Wheel axle radial mechanism, bogie and railway wagon

Abstract

The utility model discloses a wheel axle radial mechanism, bogie and railway wagon, which has good adaptability, can be applied to various brake devices and is more convenient for assembling the bogie.

Description

Technical Field

[0001] This utility model relates to a wheel axle radial mechanism, a bogie, and a railway freight car. Background Technology

[0002] Currently, a radial mechanism for wheels and axles can be added to the traditional three main bogie components. When railway freight cars pass through curves, this radial mechanism forces the wheelset to make a radial displacement along the curve, reducing the angle of attack between the wheel and the rail, greatly improving wheel flange wear, and extending wheel and rail life.

[0003] The existing wheel axle radial mechanism has the following drawbacks: 1) The sub-frame (i.e., the frame formed by two connecting rods) of the existing wheel axle radial mechanism is located at both ends of the bolster, with the connecting rods passing through the middle hole of the bolster. This occupies too much space in the bolster mounting holes, resulting in the basic braking system being limited to lever-type brakes with pull rods, which is not well-suited for integrated braking systems. Furthermore, the structure where the connecting rods pass through the middle hole of the bolster causes them to intersect with the braking system within the bolster's middle hole, increasing the difficulty of bogie assembly and complicating subsequent maintenance. 2) The existing connecting rods and U-shaped frame use a pin connection method, resulting in low structural strength. Increasing the structural strength would increase the frame weight, leading to increased costs and affecting the ease of unloading.

[0004] One document reports a radial wheelset device for an undermount railway freight car bogie. It consists of two subframes (front and rear) and two intersecting connecting rods pinned together. The subframes are a combination of a load-bearing saddle and a transverse arm. The connecting rods are positioned below the bolster to form the undermount radial structure. The center plane of the connecting rods is lower than the center plane of the load-bearing saddle surface of the subframe. The load-bearing saddle consists of a saddle surface forming an arc-shaped saddle structure and a saddle connecting arm integral with the saddle surface structure and vertically positioned at one end of the saddle surface. The subframes are fixed to the saddle using a rivet assembly. However, assembling such a U-shaped wheelset radial device with the load-bearing saddle requires limited operating space and is difficult. Utility Model Content

[0005] In view of this, one objective of this utility model is to provide a wheel axle radial mechanism, which has good adaptability and can be applied to various braking devices, effectively improving the versatility of the bogie. Furthermore, this wheel axle radial mechanism facilitates the assembly of the bogie. Another objective of this utility model is to provide a bogie. A further objective of this utility model is to provide a railway freight car.

[0006] The present invention achieves the above objectives by adopting the following technical solution.

[0007] On one hand, this utility model provides a wheel axle radial mechanism, including a main frame, connecting rods, and a load-bearing saddle, wherein there are two connecting rods; the two connecting rods form a cross-shaped structure; each connecting rod includes a rod portion and two connecting holes; the two connecting holes are respectively connected to the two ends of the rod portion; the main frame includes a first U-shaped frame and a second U-shaped frame arranged in a basically symmetrical manner; each U-shaped frame includes a radial arm and two connecting arms; the two connecting arms are respectively connected to the radial arm, and the three form a U-shaped structure, with the radial arm being the bottom of the U-shaped structure;

[0008] The radial arm is composed of a first connecting segment, a first inclined segment, a middle segment, a second inclined segment, and a second connecting segment connected in sequence. The middle segment is a straight segment with a first mounting groove and a second mounting groove spaced apart on it. The first inclined segment and the second inclined segment are symmetrically arranged. In use, a first obtuse angle is formed between one side of the middle segment and one side of the first inclined segment. The first connecting segment and the second connecting segment are symmetrically arranged. The length direction of the first connecting segment is the same as the length direction of the first inclined segment. The connecting arm includes a connected first segment and a second segment, with a second obtuse angle formed between the first segment and the second segment. The first segments of the two connecting arms are also connected to the first connecting segment and the second connecting segment, respectively. Each second segment is provided with a load-bearing saddle connecting hole.

[0009] One connecting rod has two connecting holes respectively located in the first mounting groove of the first U-shaped frame and the second mounting groove of the second U-shaped frame; the other connecting rod has two connecting holes respectively located in the second mounting groove of the first U-shaped frame and the first mounting groove of the second U-shaped frame.

[0010] The load-bearing saddle includes a load-bearing saddle body, a rubber pad mounting seat, and a U-shaped frame mounting seat; the top of the load-bearing saddle body has a planar structure; the bottom of the rubber pad mounting seat forms a first groove structure, which is configured to allow the top of the load-bearing saddle body to be inserted; the U-shaped frame mounting seat is connected to one side of the rubber pad mounting seat, and a U-shaped frame mounting hole is provided thereon.

[0011] The load-bearing saddle connecting hole is connected to the U-shaped frame mounting hole via a connector, thereby connecting the connecting arm to one side of the load-bearing saddle. This U-shaped frame structure, after being connected to a load-bearing saddle of a specific structure, can be used with various braking devices; the connecting rod does not need to pass through the central hole of the bolster and can be placed below the bolster, thus providing more operating space and facilitating bogie assembly. Radial arms can be arranged parallel to each other on both sides of the bolster. Two connecting rods (also called connecting tie rods) are arranged crosswise below the bolster.

[0012] In this invention, the connecting arm and the radial arm can be welded together to form an integral structure. The main frame, connecting rod, and load-bearing saddle form a novel double "U"-shaped radial structure for railway freight car wheel axles through connecting parts.

[0013] In this invention, the two U-shaped frames are a first U-shaped frame and a second U-shaped frame; each U-shaped frame includes a radial arm and two connecting arms. The first U-shaped frame and the second U-shaped frame have the same structure and are symmetrically arranged. The first mounting groove of the first U-shaped frame and the first mounting groove of the second U-shaped frame are arranged opposite each other. The second mounting groove of the first U-shaped frame and the second mounting groove of the second U-shaped frame are arranged opposite each other.

[0014] In this invention, the radial arm can be a one-piece frame-type box structure made of bent and welded or cast steel or steel plate. The angle between the length direction of the first connecting segment and the length direction of the first inclined segment is 0°.

[0015] According to the radial mechanism of the wheel axle of this utility model, preferably, a first mounting hole and a second mounting hole are provided at intervals on the middle section; a first through hole is provided at a position perpendicular to the first mounting hole, and the first mounting hole and the first through hole form the first mounting groove; a second through hole is provided at a position perpendicular to the second mounting hole, and the second mounting hole and the second through hole form the second mounting groove.

[0016] Reinforcing rings are installed on the upper and lower surfaces of the two mounting holes, respectively; bushings are installed inside the two mounting holes and the corresponding reinforcing rings. This U-shaped frame, when connected to the connecting rod, can further reduce the impact force between the two, thus improving operational reliability.

[0017] In this invention, by providing reinforcing rings on the upper and lower surfaces of the first mounting hole, and by providing bushings (wear-resistant, high-strength bushings) within the mounting hole and the reinforcing rings, the impact force with the connecting rod is further reduced. In some embodiments, the reinforcing ring has a circular ring structure, and the bushing has a circular cross-section. In use, the first and second mounting holes are vertically through holes, and the first and second through holes are front-to-back through holes. The first mounting hole and the first through hole intersect, and the second mounting hole and the second through hole intersect.

[0018] According to the radial wheel and axle mechanism of this utility model, preferably, two connecting holes of one connecting rod are respectively inserted into the first through hole of the first U-shaped frame and the second through hole of the second U-shaped frame, and are configured to have an interference fit between the two connecting holes and the first mounting hole of the first U-shaped frame and the second mounting hole of the second U-shaped frame via a connector; two connecting holes of the other connecting rod are respectively inserted into the second through hole of the first U-shaped frame and the first through hole of the second U-shaped frame, and are configured to have an interference fit between the two connecting holes and the second mounting hole of the first U-shaped frame and the first mounting hole of the second U-shaped frame via a connector. This improves the flexibility, strength, and rigidity of operation.

[0019] In this utility model, when the connecting rod is connected to the U-shaped frame, the strength and stiffness of the connection can be improved by the elastic hinge sleeve with a specific structure on the connecting rod, which can improve the impact resistance. Furthermore, by adjusting the shrinkage of the inner and outer steel layers and the matching elastic body layer, the pre-compression amount and radial and axial stiffness requirements of the elastic hinge sleeve connector can be met. It can also provide different anti-diamond stiffness values ​​for the vibration damping device of railway vehicle (e.g., railway freight car) bogie.

[0020] According to the radial mechanism of the wheel axle described in this utility model, preferably, the connecting hole includes a connecting body and an elastic hinge sleeve. Both the connecting body and the elastic hinge sleeve are cylindrical structures. The elastic hinge sleeve is embedded in the connecting body, and their central axes coincide. The elastic hinge sleeve includes, from the inside out, a steel inner layer, an elastomer layer, and a steel outer layer. The steel outer layer is cylindrical. The outer surface of the elastomer layer is cylindrical. When the central axis of the elastic hinge sleeve is horizontal, the outer surface of the steel inner layer has an arched shape in longitudinal section, and the inner surface of the elastomer layer matches the outer surface of the steel inner layer. This improves the strength and stiffness of the connecting rod structure, which is beneficial for improving the reliability of the connection and extending its service life. It also improves the adaptability to harsh circuits during actual operation and can effectively mitigate the impact and vibration generated.

[0021] In this invention, the steel inner layer, the elastomer layer, and the steel outer layer can be fused together by vulcanization. Both end faces of the steel inner and outer layers are horizontal, while both end faces of the elastomer layer are concave relative to the two end faces of the steel inner layer.

[0022] In this invention, the two connecting rods can be interchanged and are not restricted by direction.

[0023] According to the radial mechanism of the wheel axle described in this utility model, preferably:

[0024] The first obtuse angle is greater than 120° and less than 180°; the second obtuse angle is greater than 100° and less than 175°;

[0025] The first inclined section, the middle section, and the second inclined section are hollow frame structures.

[0026] In this invention, a bending structure is formed between the middle section and the first inclined section, and a bending structure is formed between the middle section and the second inclined section. According to one embodiment of this invention, in use, a first obtuse angle is formed between a side surface perpendicular to the upper surface of the middle section and along the length of the middle section, and a side surface perpendicular to the upper surface of the first inclined section and along the length of the first inclined section. This first obtuse angle is greater than 125° and less than 175°.

[0027] Similarly, in use, a first obtuse angle is formed between a side perpendicular to the upper surface of the intermediate segment and along the length of the intermediate segment, and a side perpendicular to the upper surface of the second inclined segment and along the length of the second inclined segment. This first obtuse angle is greater than 120° and less than 175°.

[0028] According to one embodiment of this utility model, the second obtuse angle formed between the first segment and the second segment is greater than 120° and less than 175°. In use, the opening direction of this second obtuse angle faces the horizontal plane. This facilitates connection with the outer side of the support saddle.

[0029] In this invention, the hollow frame structure helps to reduce weight.

[0030] According to the radial mechanism of the wheel axle described in this utility model, preferably:

[0031] The outer contour of the middle section is a cuboid structure, and the length of the middle section is greater than the length of the first inclined section and greater than the length of the first connecting section.

[0032] The outer contour of the first inclined segment is close to a cuboid structure, and its perimeter is the same as that of the middle segment.

[0033] The outer contour of the first connecting segment is a cuboid or cylindrical structure, and its perimeter is smaller than that of the first inclined segment. This helps to reduce weight while ensuring strength.

[0034] According to the radial mechanism of the wheel axle of this utility model, preferably, the rubber pad mounting seat includes a flat portion, a side portion A, a side portion B, a protrusion, and a dovetail tenon; wherein, the flat portion has a planar structure, the side portions A and B are respectively perpendicularly disposed on both sides of the flat portion, and the three form the first groove structure; one end of the protrusion is connected to the side portion A; one end of the dovetail tenon is connected to the side portion B; the upper surface of the protrusion, the upper surface of the dovetail tenon, and the upper surface of the flat portion are coplanar with the upper surface of the flat portion;

[0035] The U-shaped frame mounting base is connected to side part B and the dovetail tenon. In use, the upper surface of the U-shaped frame mounting base is lower than the upper surface of the dovetail tenon, forming a second groove structure between the U-shaped frame mounting base and side part B. This type of load-bearing saddle improves the strength of the connection with the U-shaped frame, facilitates assembly, provides ample operating space, and facilitates the fixing of the axle box rubber pad.

[0036] The rubber pad mounting base of this invention facilitates a tight fit with the axle box rubber pad, better preventing the axle box rubber pad from slipping off. In this invention, the extension direction of the protrusion and dovetail tenon is the same as the length direction of the flat part, that is, perpendicular to the length direction of the U-shaped frame mounting base. In some embodiments, the upper surface of the flat part is rectangular.

[0037] According to one embodiment of this utility model, one end of the protrusion is connected to the middle of the side portion A; a T-shaped structure is formed between the protrusion and the side portion A. One end of the dovetail tenon is connected to the middle of the side portion B; a T-shaped structure is formed between the dovetail tenon and the side portion B. The thickness of both ends of the U-shaped frame mounting base is greater than the thickness of the flat portion.

[0038] According to the radial mechanism of the wheel axle described in this utility model, preferably:

[0039] The inner surface of the bearing saddle body is arc-shaped, and an arc-shaped groove is provided on the inner surface;

[0040] The lower surface of the U-shaped frame mounting base has an arc-shaped structure; in use, the arc surface of this arc-shaped structure is located above the arc surface of the inner surface of the bearing saddle body.

[0041] A trapezoidal platform-shaped protrusion is provided on the side portion B; in the use state, the upper surface of the trapezoidal platform-shaped protrusion is configured as a surface that gradually slopes downward from the edge of the flat portion; there is a gap between the trapezoidal platform-shaped protrusion and the dovetail tenon.

[0042] A trapezoidal platform-shaped protrusion is also provided on side A. This facilitates the fixation between the protrusion and the axle box rubber pad. The trapezoidal platform-shaped protrusion described in this utility model is not strictly a trapezoidal platform shape, but rather resembles a trapezoidal platform shape.

[0043] Multiple square-shaped protrusions are provided on the outer surfaces of both ends of the load-bearing saddle body; load-bearing saddle guide frames are provided on the outer surfaces of both ends of the load-bearing saddle body, and the length direction of the load-bearing saddle guide frames forms an obtuse angle with the long side direction of the upper surface of the planar part. In use, the load-bearing saddle guide frames are located below the square-shaped protrusions. In this utility model, the square-shaped protrusions are provided to mark the manufacturer, manufacturing date, and materials. Vertical positioning and guidance can be achieved through the load-bearing saddle guide frames and the side frames on both sides of the bogie, thus determining the correct position of the wheelset assembly in the bogie.

[0044] In this invention, the arc-shaped groove facilitates bearing installation and also provides convenient storage for grease and other materials. Arc-shaped side guards are provided on both sides of the bearing saddle body. These side guards help prevent bearing movement during operation.

[0045] On the other hand, this utility model also provides a bogie, which includes the wheel axle radial mechanism as described above. Using the wheel axle radial mechanism of this utility model can reduce the processing and assembly difficulty of the bogie, improve maintenance efficiency, and simultaneously allow for modular manufacturing, improving manufacturability and mass production capabilities, thus significantly enhancing economic benefits.

[0046] Furthermore, this utility model also provides a railway freight car, including the bogie described above.

[0047] The radial axle mechanism of this invention has good adaptability and can be applied to various braking devices, effectively improving the versatility of the bogie and facilitating its technical transformation and product upgrades. Furthermore, the radial axle mechanism offers a larger operating space, facilitating bogie assembly. According to the preferred technical solution of this invention, a U-shaped frame with a specific structure and a load-bearing saddle with a specific structure are used, allowing the connecting arm of the U-shaped frame to connect to the outer side of the load-bearing saddle. This radial axle mechanism is lightweight without compromising strength. In addition, the connection between the connecting rod and the main frame body via an elastic hinge sleeve, auxiliary reinforcing rings, and bushings improves the stress state of the connecting parts, enhances the reliability of the connection, extends service life, improves the safety and reliability of the entire radial axle mechanism during operation, and enhances the structural stability of the bogie. Attached Figure Description

[0048] Figure 1 This is a schematic diagram showing the relationship between the radial mechanism of the wheel axle and the rubber pad of the axle box in this utility model.

[0049] Figure 2 This is a structural diagram of the U-shaped frame (first U-shaped frame or second U-shaped frame) of this utility model.

[0050] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0051] Figure 4 This is an enlarged schematic diagram of the connecting arm of the U-shaped frame.

[0052] Figure 5 This is a schematic diagram of the connecting rod.

[0053] Figure 6 This is a three-dimensional schematic diagram of a connecting rod.

[0054] Figure 7 for Figure 6 A front view diagram (not a front view in the strict sense).

[0055] Figure 8 This is a top view of the connecting rod (not a strictly defined top view).

[0056] Figure 9 This is a longitudinal sectional view of the elastic hinge sleeve of this utility model.

[0057] Figure 10 This is a partial schematic diagram of the radial mechanism of the wheel and axle (the connection between the connecting rod and the U-shaped frame).

[0058] Figure 11 for Figure 10 A schematic diagram of its longitudinal section.

[0059] Figure 12 This is a schematic diagram of the structure of the load-bearing saddle of this utility model.

[0060] Figure 13 for Figure 12 The rear view diagram (not a strictly rear view, but a view of the load-bearing saddle from an oblique rear).

[0061] Figure 14 for Figure 12 A diagram showing the load-bearing saddle viewed from below (not a strictly vertical view, but tilted upwards).

[0062] The annotations in the attached figures are explained as follows:

[0063] 10-Main frame body; 11-Radial arm; 111-First connecting section; 112-First inclined section; 113-Intermediate section; 114-Second inclined section; 115-Second connecting section; 1131-First mounting hole; 1132-Second mounting hole; 1133-Reinforcing ring; 1134-Bushing; 12-Connecting arm; 121-First section; 122-Second section; 1221-Bearing saddle connecting hole; 131-Special bolt; 132-Washer; 133-Counternut; 134-Cotter pin;

[0064] A bending structure is formed between the middle section and the first inclined section, where α is the first obtuse angle formed between one side of the middle section and one side of the first inclined section; and β is the second obtuse angle formed between the first section and the second section.

[0065] 20-Connecting rod, 211-First rod part, 212-Intermediate rod part, 213-Second rod part, 214-Connecting hole part, 2141-Connecting part body, 2142-Elastic hinge sleeve, a-Steel inner layer, b-Elastic body layer, c-Steel outer layer;

[0066] 30-Bearing saddle, 31-Bearing saddle body, 311-Square protrusion, 312-Bearing saddle guide frame, 313-Saddle surface, 314-First arc-shaped groove, 315-Arch-shaped side guard, 32-Rubber pad mounting seat, 321-Flat surface, 324-Protrusion, 325-Dovetail tenon, 33-U-shaped frame mounting seat, 331-U-shaped frame mounting hole;

[0067] 100-Axle box rubber pad. Detailed Implementation

[0068] The present invention will be further described below with reference to specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0069] Example 1

[0070] like Figures 1 to 14 As shown, this embodiment provides a radial axle mechanism, which includes a main frame 10, a connecting rod 20, and a bearing saddle 30. An axle box rubber pad 100 can be mounted on the bearing saddle 30.

[0071] like Figure 1 As shown, the main frame 10 includes two symmetrically arranged U-shaped frames, namely the first U-shaped frame and the second U-shaped frame. Figure 2 As shown, each U-shaped frame includes a radial arm 11 and two connecting arms 12. The two connecting arms 12 are connected to both ends of the radial arm 11, forming a U-shaped structure, with the radial arm 11 being the bottom of this U-shaped structure.

[0072] The radial arm 11 is composed of a first connecting segment 111, a first inclined segment 112, an intermediate segment 113, a second inclined segment 114, and a second connecting segment 115 connected in sequence. The intermediate segment 113 is a straight segment with a first mounting groove and a second mounting groove spaced apart on it. The first inclined segment 112 and the second inclined segment 114 are symmetrically arranged on both sides of the intermediate segment 113. In use, a first obtuse angle α is formed between one side of the intermediate segment 113 and one side of the first inclined segment 112. Specifically, the outer contour of the intermediate segment 113 is a cuboid structure. In use, a first obtuse angle α is formed between one side perpendicular to the upper surface of the intermediate segment 113 and along its length, and another side perpendicular to the upper surface of the first inclined segment 112 and along its length. This first obtuse angle α is greater than 120° and less than 175°, for example, greater than 150° and less than 175°.

[0073] The first connecting segment 111 and the second connecting segment 115 are symmetrically arranged. The length direction of the first connecting segment 111 is the same as the length direction of the first inclined segment 115.

[0074] like Figure 2 and Figure 3As shown, the middle section 113 has a first mounting hole 1131 and a second mounting hole 1132 spaced apart, both of which are through holes. Reinforcing rings 1133 are respectively provided on the upper and lower surfaces of these two mounting holes; bushings 1134 are provided inside these two mounting holes and the corresponding reinforcing rings 1133. Specifically, reinforcing rings 1133 are provided on the upper and lower surfaces of the first mounting hole 1131 and the second mounting hole 1132, respectively. Bushings 1134 are provided inside the first mounting hole 1131 and the corresponding reinforcing rings 1133, with two bushings 1134 arranged vertically. Bushings 1134 are provided inside the second mounting hole 1132 and the corresponding reinforcing rings 1133, with two bushings 1134 arranged vertically. The bushings 1134 are wear-resistant, high-strength bushings.

[0075] A first through hole is provided at a position perpendicular to the first mounting hole 1131, and a second through hole is provided at a position perpendicular to the second mounting hole 1132. That is, the first and second through holes are provided on the side of the middle section 113, both being through holes and elongated oval holes. The extension direction of the first through hole is perpendicular to the extension direction of the first mounting hole 1131, and the first through hole intersects with the first mounting hole 1131, forming a first mounting groove. The extension direction of the second through hole is perpendicular to the extension direction of the second mounting hole 1132, and the second through hole intersects with the second mounting hole 1132, forming a second mounting groove.

[0076] The length of the middle segment 113 is greater than the length of the first inclined segment 112 and the length of the first connecting segment 111. The outer contour of the first inclined segment 112 is close to a cuboid structure, and its perimeter is the same as that of the middle segment 113. Similarly, the outer contour of the second inclined segment 114 is close to a cuboid structure, and its perimeter is the same as that of the middle segment 113. The outer contour of the first connecting segment 111 is a cuboid or cylindrical structure, and its perimeter is less than that of the first inclined segment 112. The outer contour of the second connecting segment 115 is a cuboid or cylindrical structure, and its perimeter is less than that of the second inclined segment 114.

[0077] The first inclined section 112, the middle section 113, and the second inclined section 114 are hollow frame structures, and the three of them are integrally formed.

[0078] The connecting arm 12 includes a first segment 121 and a second segment 122 connected together. One end of the first segment 121 of the two connecting arms 12 is connected to the other end of the first connecting segment 111 and the other end of the second connecting segment 115, respectively, in a near-perpendicular connection. A second obtuse angle β is formed between the first segment 121 and the second segment 122, where β is greater than 100° and less than 175°, for example, greater than 110° and less than 165°. In use, the opening direction of the angle formed between the first segment 121 and the second segment 122 faces the horizontal plane.

[0079] like Figures 1 to 4 As shown, when the intermediate section 113 is horizontal, the upper surface of the intermediate section 113 is not parallel to the upper surface of the second section 122. Each second section 122 is provided with two bearing saddle connecting holes 1221. The second section 122 of the connecting arm 12 is used to connect to the bearing saddle 30.

[0080] like Figures 5 to 9 As shown, there are two connecting rods 20; in use, the two connecting rods 20 form a cross-shaped structure, which can be called a sub-frame. Each connecting rod 20 includes a rod portion and two connecting hole portions 214. The two connecting hole portions 214 are respectively connected to both ends of the rod portion. The two connecting hole portions 214 are symmetrically arranged.

[0081] The rod portion includes a first rod portion 211, an intermediate rod portion 212, and a second rod portion 213 connected in sequence. The first rod portion 211 and the second rod portion 213 are symmetrically arranged at both ends of the intermediate rod portion 212. The first rod portion 211 has a first surface that is relatively parallel to each other. Figure 6 In the middle section, the upper surface of the first rod portion 211 is the first surface, and the second surface is the second surface. In use, these two surfaces are vertically opposite each other and are perpendicular to the central axis of the connecting hole portion 214. The intermediate rod portion 212 has a third surface that is arranged parallel to each other. Figure 6 In the middle, the upper surface of the intermediate rod 212 is the third surface and the fourth surface. Figure 6 In the middle, the third surface is convex upward relative to the plane containing the first surface, and the fourth surface is parallel to the third surface. In the use state, the fourth surfaces of the two connecting rods 20 are close to each other.

[0082] The centerline of the intermediate rod portion 212 along its length is parallel to the centerline of the first rod portion 211 along its length. The width of the intermediate rod portion 212 is greater than the width of the first rod portion 211 and the second rod portion 213. The length of the intermediate rod portion 212 is greater than the length of the first rod portion 211 and the second rod portion 213. The eccentricity of the connecting rod 20 is less than or equal to 15 mm. For example, the eccentricity of the connecting rod 20 is less than or equal to 10 mm. Specifically, in this embodiment, the eccentricity of the connecting rod 20 is 9 mm.

[0083] The connecting hole portion 214 includes a connecting body 2141 and an elastic hinge sleeve 2142. The connecting body 2141 is basically cylindrical. The elastic hinge sleeve 2142 is cylindrical. The elastic hinge sleeve 2142 is embedded in the connecting body 2141, and their central axes coincide. The elastic hinge sleeve 2142, from the inside out (i.e., from the inner surface to the outer surface), includes a steel inner layer a, an elastomer layer b, and a steel outer layer c. The steel outer layer c is cylindrical. The outer surface of the elastomer layer b is cylindrical. When the central axis of the elastic hinge sleeve 2142 is horizontal, the outer surface of the steel inner layer a has an arched shape in longitudinal section, and the inner surface of the elastomer layer b matches the outer surface of the steel inner layer a.

[0084] One end face of the connecting hole 214 is coplanar with the first surface of the first rod 211, and the other end face of the connecting hole 2142 is coplanar with the second surface of the first rod 211.

[0085] The rod and the connecting body 2141 are integrally formed structures.

[0086] The first mounting slot of the first U-shaped frame and the first mounting slot of the second U-shaped frame are arranged opposite to each other, and the second mounting slots of the first U-shaped frame and the second mounting slots of the second U-shaped frame are arranged opposite to each other. For example... Figure 1 , Figure 10 and Figure 11As shown, the two connecting holes 214 of one connecting rod 20 are respectively disposed in the first mounting groove of the first U-shaped frame and the second mounting groove of the second U-shaped frame. The two connecting holes 214 of the other connecting rod 20 are respectively disposed in the second mounting groove of the first U-shaped frame and the first mounting groove of the second U-shaped frame. Specifically, the two connecting holes 214 of one connecting rod 30 are respectively inserted into the first through hole of the first U-shaped frame and the second through hole of the second U-shaped frame, and are interference-fitted with the first mounting hole 1131 of the first U-shaped frame and the second mounting hole 1132 of the second U-shaped frame by connecting parts (e.g., connecting parts include special bolts 131, washers 132, countersunk nuts 133, and cotter pins 134). The two connecting holes 214 of the other connecting rod 20 are respectively inserted into the second through hole of the first U-shaped frame and the first through hole of the second U-shaped frame. The two connecting holes 214 are then connected to the second mounting hole 1132 of the first U-shaped frame and the first mounting hole 1131 of the second U-shaped frame via connecting components (e.g., a shaped bolt 131, a washer 132, a countersunk nut 133, and a cotter pin 134) with an interference fit. The shaped bolt 131 passes sequentially through the reinforcing ring 1133 on the upper surface of the intermediate section 113, the bushing 1134, the elastic hinge sleeve 2142 of the connecting hole 214, the bushing 1134, and the reinforcing ring 1133 on the lower surface of the intermediate section 113. Then, the washer 132 and the countersunk nut 133 are fitted onto the shaped bolt 131, and finally, the cotter pin 134 is passed through the shaped bolt 131 for fixation. This achieves an interference fit between the shaped bolt 131 and the elastic hinge sleeve 2142.

[0087] like Figures 12 to 14 As shown, the load-bearing saddle 30 includes a load-bearing saddle body 31, a rubber pad mounting base 32, and a U-shaped frame mounting base 33. The outer contour of the load-bearing saddle body 31 is basically arc-shaped, and the inner surface of the load-bearing saddle body 31 is also arc-shaped. The top of the load-bearing saddle body 31 is planar. The bottom of the rubber pad mounting base 32 forms a first groove structure, which is configured for the top of the load-bearing saddle body 31 to be inserted. The U-shaped frame mounting base 33 is connected to one side of the rubber pad mounting base 32, and has a U-shaped frame mounting hole 331.

[0088] like Figure 1 As shown, the bearing saddle connecting hole 1221 is connected to the U-shaped frame mounting hole 331 through a connector, thereby connecting the connecting arm 12 to one side of the bearing saddle 30.

[0089] like Figure 14As shown, the inner surface of the supporting saddle body 31 has two saddle surfaces 313, which are spaced apart. The inner surface of the supporting saddle body 31 also has arc-shaped grooves, including a first arc-shaped groove 314 and a second arc-shaped groove. The first arc-shaped groove 314 is located between the two saddle surfaces 313, and the second arc-shaped groove is located on the side of each saddle surface 313 away from the first arc-shaped groove 314. The depth of the second arc-shaped groove is less than the depth of the first arc-shaped groove 314, and the width of the second arc-shaped groove is less than the width of the first arc-shaped groove 314.

[0090] The supporting saddle body 31 also includes two arc-shaped side blocks 315, which are located on both sides of the supporting saddle body 31. The arc surface of the inner surface of the arc-shaped side blocks 315 is not the same as the arc surface of the saddle surface 313. In use, the arc surface of the inner surface of the arc-shaped side blocks 315 is lower than the arc surface of the saddle surface 313.

[0091] like Figure 12 and Figure 14 As shown, multiple square protrusions 311 are provided on the outer surfaces of both ends of the bearing saddle body 31. Bearing saddle guide frames 312 are provided on the outer surfaces of both ends of the bearing saddle body 31, and the length direction of the bearing saddle guide frame 312 forms an obtuse angle with the length direction of the upper surface of the planar portion 321. In use, the bearing saddle guide frames 312 are located below the square protrusions 311. Four bearing saddle guide frames 312 are provided, and the four bearing saddle guide frames 312 are evenly distributed on the edges of the outer surfaces of both ends of the bearing saddle body 31.

[0092] Specifically, four square protrusions 311 are evenly arranged on the outer surface of one end of the bearing saddle body 31, and two square protrusions 311 are evenly arranged on the outer surface of the other end.

[0093] like Figure 12 As shown, the rubber pad mounting base 32 includes a flat portion 321, a side portion A, a side portion B, a protrusion 324, and a dovetail portion 325. The flat portion 321 has a planar structure, and the side portions A and B are respectively vertically disposed on both sides of the flat portion 321, forming a first groove structure. The top of the bearing saddle body 31 is embedded in this first groove structure. One end of the protrusion 324 is connected to the middle of the side portion A; one end of the dovetail portion 325 is connected to the middle of the side portion B; the upper surfaces of the protrusion 324 and the dovetail portion 325 are coplanar with the upper surface of the flat portion 321.

[0094] The U-shaped frame mounting base 33 is connected to the side part B and the dovetail tenon part 325, and is provided with U-shaped frame mounting holes 331. There are two U-shaped frame mounting holes 331, located at both ends of the U-shaped frame mounting base 33.

[0095] In use, the plane containing the upper surface of the U-shaped frame mounting base 33 is lower than the plane containing the upper surface of the dovetail tenon 325, forming a second groove structure between the U-shaped frame mounting base 33 and the side portion B. Figure 12 In the middle, there are two second groove structures, which are separated by a dovetail tenon 325. One of the second groove structures has an upper opening and a front opening; the other second groove structure has an upper opening and a rear opening.

[0096] The lower surface of the U-shaped frame mounting base 33 has an arc-shaped structure; in use, the arc surface of this arc structure is located above the arc surface of the inner surface of the bearing saddle body 31. The two corners of the U-shaped frame mounting base 33 away from the side portion B are rounded.

[0097] Side portion B is provided with a trapezoidal platform-shaped protrusion (not a strictly trapezoidal platform-shaped protrusion, but a similar one); in use, the upper surface of the trapezoidal platform-shaped protrusion is a surface that gradually slopes downward from the edge of the flat portion 321; there is a gap between the trapezoidal platform-shaped protrusion and the dovetail portion 325. Side portion A is also provided with a similar trapezoidal platform-shaped protrusion.

[0098] The end of the dovetail tenon 325 away from the side portion B is located on the U-shaped frame mounting base 33. The upper surface of the dovetail tenon 325 is rectangular. Based on the short side of the rectangle closest to the U-shaped frame mounting base 33, a vertical surface is made on the upper surface of the U-shaped frame mounting base 33. This vertical surface forms a through hole structure between the upper surface of the U-shaped frame mounting base 33 and the end face of the dovetail tenon 325. The cross-section of the through hole structure is quadrilateral.

[0099] Example 2

[0100] This embodiment provides a bogie including the axle radial mechanism as described in Embodiment 1. In use, the axle radial mechanism is positioned below the bolster, and the connecting rod 20 does not need to pass through the central hole of the bolster.

[0101] Example 3

[0102] This embodiment provides a railway freight car, which includes a bogie as described in Embodiment 2.

[0103] This utility model is not limited to the above-described embodiments. Any modifications, improvements, or substitutions that can be conceived by those skilled in the art without departing from the essential content of this utility model fall within the scope of this utility model.

Claims

1. A wheel axle radial mechanism comprising a main frame body, a connecting rod and a load bearing saddle, wherein, The connecting rod consists of two rods; the two connecting rods form a cross-shaped structure; each connecting rod includes a rod portion and two connecting holes; the two connecting holes are respectively connected to the two ends of the rod portion; the main frame includes a first U-shaped frame and a second U-shaped frame arranged in a basically symmetrical manner; each U-shaped frame includes a radial arm and two connecting arms; the two connecting arms are respectively connected to the radial arm, and the three form a U-shaped structure, with the radial arm being the bottom of this U-shaped structure; characterized in that... The radial arm is composed of a first connecting segment, a first inclined segment, a middle segment, a second inclined segment, and a second connecting segment connected in sequence. The middle segment is a straight segment with a first mounting groove and a second mounting groove spaced apart on it. The first inclined segment and the second inclined segment are symmetrically arranged. In use, a first obtuse angle is formed between one side of the middle segment and one side of the first inclined segment. The first connecting segment and the second connecting segment are symmetrically arranged. The length direction of the first connecting segment is the same as the length direction of the first inclined segment. The connecting arm includes a connected first segment and a second segment, with a second obtuse angle formed between the first segment and the second segment. The first segments of the two connecting arms are also connected to the first connecting segment and the second connecting segment, respectively. Each second segment is provided with a load-bearing saddle connecting hole. One connecting rod has two connecting holes respectively located in the first mounting groove of the first U-shaped frame and the second mounting groove of the second U-shaped frame; the other connecting rod has two connecting holes respectively located in the second mounting groove of the first U-shaped frame and the first mounting groove of the second U-shaped frame. The load-bearing saddle includes a load-bearing saddle body, a rubber pad mounting seat, and a U-shaped frame mounting seat; the top of the load-bearing saddle body has a planar structure; the bottom of the rubber pad mounting seat forms a first groove structure, which is configured to allow the top of the load-bearing saddle body to be inserted; the U-shaped frame mounting seat is connected to one side of the rubber pad mounting seat, and a U-shaped frame mounting hole is provided thereon. The load-bearing saddle connecting hole is connected to the U-shaped frame mounting hole through a connector, thereby connecting the connecting arm to one side of the load-bearing saddle.

2. The axle radial mechanism of claim 1, wherein, The middle section is provided with a first mounting hole and a second mounting hole at intervals; a first through hole is provided at a position perpendicular to the first mounting hole, and the first mounting hole and the first through hole form the first mounting groove; a second through hole is provided at a position perpendicular to the second mounting hole, and the second mounting hole and the second through hole form the second mounting groove. Reinforcing rings are provided on the upper and lower surfaces of the two mounting holes respectively; bushings are provided in the two mounting holes and the corresponding reinforcing rings.

3. The axle radial mechanism of claim 2, wherein, One connecting rod has two connecting holes that pass through the first through hole of the first U-shaped frame and the second through hole of the second U-shaped frame, respectively, and is configured to have an interference fit between the two connecting holes and the first mounting hole of the first U-shaped frame and the second mounting hole of the second U-shaped frame, respectively, through a connector; the other connecting rod has two connecting holes that pass through the second through hole of the first U-shaped frame and the first through hole of the second U-shaped frame, respectively, and is configured to have an interference fit between the two connecting holes and the second mounting hole of the first U-shaped frame and the first mounting hole of the second U-shaped frame, respectively, through a connector.

4. The axle radial mechanism of claim 1, wherein, The connecting hole portion includes a connecting body and an elastic hinge sleeve. Both the connecting body and the elastic hinge sleeve are cylindrical structures. The elastic hinge sleeve is embedded in the connecting body, and their central axes coincide. The elastic hinge sleeve includes, from the inside out, a steel inner layer, an elastomer layer, and a steel outer layer. The steel outer layer is cylindrical. The outer surface of the elastomer layer is cylindrical. When the central axis of the elastic hinge sleeve is in the horizontal direction, the outer surface of the steel inner layer is arched in longitudinal section, and the inner surface of the elastomer layer matches the outer surface of the steel inner layer.

5. The wheel and axle radial mechanism according to claim 1, characterized in that: The first obtuse angle is greater than 120° and less than 180°; the second obtuse angle is greater than 100° and less than 175°; The first inclined section, the middle section, and the second inclined section are hollow frame structures.

6. The wheel and axle radial mechanism according to claim 1, characterized in that: The outer contour of the middle section is a cuboid structure, and the length of the middle section is greater than the length of the first inclined section and greater than the length of the first connecting section. The outer contour of the first inclined segment is close to a cuboid structure, and its perimeter is the same as that of the middle segment. The outer contour of the first connecting segment is a cuboid or cylindrical structure, and its perimeter is smaller than that of the first inclined segment.

7. The axle radial mechanism of claim 1, wherein, The rubber pad mounting base includes a flat portion, a side portion A, a side portion B, a protrusion, and a dovetail tenon; wherein, the flat portion has a planar structure, and the side portions A and B are respectively perpendicularly disposed on both sides of the flat portion, forming the first groove structure; one end of the protrusion is connected to the side portion A; one end of the dovetail tenon is connected to the side portion B; the upper surface of the protrusion, the upper surface of the dovetail tenon, and the upper surface of the flat portion are coplanar; The U-shaped frame mounting base is connected to the side part B and the dovetail tenon; in the use state, the plane where the upper surface of the U-shaped frame mounting base is located is lower than the plane where the upper surface of the dovetail tenon is located, and a second groove structure is formed between the U-shaped frame mounting base and the side part B.

8. The wheel and axle radial mechanism according to claim 7, characterized in that: The inner surface of the bearing saddle body is arc-shaped, and an arc-shaped groove is provided on the inner surface; The lower surface of the U-shaped frame mounting base has an arc-shaped structure; in use, the arc surface of this arc-shaped structure is located above the arc surface of the inner surface of the bearing saddle body. A trapezoidal platform-shaped protrusion is provided on the side portion B; in the use state, the upper surface of the trapezoidal platform-shaped protrusion is configured as a surface that gradually slopes downward from the edge of the flat portion; there is a gap between the trapezoidal platform-shaped protrusion and the dovetail tenon.

9. A bogie, characterized by It includes the wheel and axle radial mechanism as described in any one of claims 1 to 8.

10. A railway wagon characterised in that, Includes the bogie as described in claim 9.

Images