Bolt mounting structure and vehicle bogie

Abstract

The utility model provides a kind of bolt mounting structure and vehicle bogie, it is related to railway vehicle technical field, bolt mounting structure is applied to vehicle bogie, and vehicle bogie includes framework and drive system;Bolt mounting structure includes connecting flange, multiple mounting seat, mounting nut and bolt rod;Connecting flange is located between framework and drive system;Multiple mounting seat is located in the cavity of framework, and mounting nut is located on multiple mounting seat;Bolt rod is through the outer wall of framework, connecting flange and drive system, and one end is matched with mounting nut, and the other end extends to the mounting hole outside drive system shell. Through external bolt rod and built-in linkage type mounting seat cooperation, fastening operation is completed completely in external space. Realize the convenient installation and visual maintenance of bogie framework and drive system. Operating personnel can complete bolt fastening operation without entering cavity, significantly reduce installation difficulty and time cost.

Description

Technical Field

[0001] This utility model relates to the field of rail vehicle technology, and more specifically, to a bolt-mounted structure and a vehicle bogie. Background Technology

[0002] The bogie is a core component of rail vehicles, and the reliability of its connection between the drive system and the bogie, as well as the ease of installation and maintenance, directly affects the train's operational safety and operating costs. Traditional connection methods typically involve bolts penetrating the bogie's sidewalls and connecting flanges from the outside, finally screwing into threaded holes on the drive system housing, or using a separate nut for tightening from the inside of the drive system. However, both methods have significant drawbacks:

[0003] 1. The internal space of the drive system mounting cavity of the bogie frame is usually extremely small. When it is necessary to fix the nut in the internal cavity or use a wrench to prevent rotation, it is difficult for the operator to enter, or there is not enough operating space for a regular wrench, which makes the installation process time-consuming and laborious, with low installation efficiency, and is prone to introducing safety hazards due to insufficient tightening torque.

[0004] 2. The nut is located inside the enclosed frame cavity, making it impossible to observe directly during routine inspections and maintenance. Maintenance personnel must use specialized tools or open the inspection hole to check if the nut is loose. This not only increases the complexity and time cost of maintenance but may also leave operational risks due to oversight. Utility Model Content

[0005] The purpose of this utility model is to provide a bolt-mounted structure and a vehicle bogie to improve the convenience of installation and maintenance and reduce safety hazards.

[0006] To solve the above problems, this utility model provides a bolt mounting structure and a vehicle bogie.

[0007] In a first aspect, this utility model provides a bolt mounting structure applied to a vehicle bogie, the vehicle bogie including a frame and a drive system; the bolt mounting structure includes a connecting flange, a multi-mounted mounting base, a mounting nut, and a bolt shank; the connecting flange is located between the frame and the drive system; the multi-mounted mounting base is located in the cavity of the frame, and the mounting nut is located on the multi-mounted mounting base; the bolt shank penetrates the outer wall of the frame, the connecting flange, and the drive system, with one end cooperating with the mounting nut and the other end extending to the outside of the mounting hole of the drive system housing.

[0008] The beneficial effects of the bolt mounting structure in this embodiment of the utility model are:

[0009] The connecting flange is clamped between the frame end face and the drive system housing to form a pressure transmission interface. The multi-unit mounting base is pre-fixed at a specific position inside the cavity, and the mounting nut is secured within the multi-unit mounting base. During installation, the operator inserts the bolt shank sequentially through the outer wall through-hole, the connecting flange center hole, and the drive system mounting hole from the outside of the frame, finally screwing it into the nut inside the multi-unit mounting base to form a threaded connection. The exposed end of the bolt shank extends to the outside of the drive system, forming a visual operating interface and transferring the installation reference to an accessible area. Through the cooperation of the external bolt shank and the built-in linkage mounting base, the tightening operation is completed entirely in the external space, achieving convenient installation and visual maintenance of the bogie frame and drive system. Operators can complete bolt tightening without entering the cavity, significantly reducing installation difficulty and time costs. The exposed bolt shank end allows direct observation of the connection status during routine inspections, avoiding the workload of disassembling inspection holes. The multi-unit mounting base forms a stable support system, ensuring even load distribution across multiple connection points and improving structural reliability.

[0010] Optionally, the multi-unit mounting base includes a nut seat and a connector; multiple nut seats are connected in series via the connector; and mounting nuts are installed inside the nut seats.

[0011] Optionally, the connecting member is a rigid connecting rod, and the nut seat is integrally cast with the rigid connecting rod or fixed by welding.

[0012] Optionally, the nut seat has a nut groove; the mounting nut is fitted into the nut groove.

[0013] Optionally, two of the opposite outer walls of the mounting nut are fitted against the groove wall of the nut groove to restrict the rotation of the mounting nut within the nut groove.

[0014] Optionally, a limiting groove is provided in the groove wall of the nut groove; the mounting nut is installed in the limiting groove.

[0015] Optionally, a limiting hole is provided at the bottom or wall of the nut groove; a recess is provided at the corresponding position of the nut installation; an elastic limiting element is provided in the limiting hole or recess; the elastic limiting element protrudes to engage with the recess or limiting hole.

[0016] Optionally, the number of multi-unit mounting bases shall not be less than two, and the not less than two multi-unit mounting bases shall be distributed at circumferential intervals along the connecting flange.

[0017] Optionally, the end of the bolt rod extending outside the drive system is provided with an anti-loosening structure, which is a double nut structure or a threaded section coated with thread-locking adhesive.

[0018] Secondly, this utility model provides a vehicle bogie, including the bolt mounting structure described above. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the bolt-mounted structure connection frame and drive system in the embodiment;

[0020] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 This is a diagram showing the distribution of the multi-unit mounting brackets on the connecting flange.

[0022] Figure 4 for Figure 3 Enlarged view of the structure at point B;

[0023] Figure 5 This is a schematic diagram of the multi-unit mounting bracket.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Frame; 20. Drive system; 30. Multi-unit mounting base; 31. Nut seat; 32. Nut groove; 33. Connector; 40. Connecting flange; 50. Mounting nut; 60. Bolt rod. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0027] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0028] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0029] like Figure 1-5 As shown, an embodiment of this utility model discloses a bolt mounting structure applied to a vehicle bogie. The vehicle bogie includes a frame 10 and a drive system 20. The bolt mounting structure includes a connecting flange 40, a multi-mount seat 30, a mounting nut 50, and a bolt shank 60. The connecting flange 40 is located between the frame 10 and the drive system 20. The multi-mount seat 30 is located in the cavity of the frame 10, and the mounting nut 50 is located on the multi-mount seat 30. The bolt shank 60 penetrates the outer wall of the frame 10, the connecting flange 40, and the drive system 20, with one end cooperating with the mounting nut 50 and the other end extending to the outside of the mounting hole of the drive system 20 housing.

[0030] The connecting flange 40 is an annular load-bearing component located between the frame 10 and the drive system 20. It can be made of forged steel plate and is used to transfer the load of the drive system 20 to the main structure of the frame 10. The multi-unit mounting base 30 is a combined support structure formed by multiple independent units connected in series. It can be made of cast alloy and is used to form a continuous nut positioning reference inside the cavity. The mounting nut 50 is a standard fastener with internal threads, specifically a hexagonal nut, used to form a threaded connection with the bolt rod 60. The bolt rod 60 is a rod-shaped part with external threads, specifically made of high-strength alloy steel, used to apply axial preload to achieve structural fixation.

[0031] It should be noted that the frame 10 is a support structure formed by multiple enclosures, and the space formed by the multiple enclosures is the cavity of the frame 10; the drive system 20 is an existing integrated drive component, which includes a housing, in which a motor, drive shaft, etc. are integrated, and the housing is used for assembly and connection with the frame.

[0032] Specifically, the connecting flange 40 is clamped between the end face of the frame 10 and the housing of the drive system 20 to form a pressure transmission interface. The multi-unit mounting base 30 is pre-fixed in a specific position inside the cavity, and the mounting nut 50 is fixed inside the multi-unit mounting base 30. During installation, the operator passes the bolt rod 60 sequentially through the outer wall through hole, the center hole of the connecting flange 40, and the mounting hole of the drive system 20 from the outside of the frame 10, and finally screws it into the nut inside the multi-unit mounting base 30 to form a threaded connection. The exposed end of the bolt rod 60 extends to the outside of the drive system 20, forming a visual operation interface. This embodiment transfers the installation reference to an accessible area. By cooperating with the built-in linkage mounting base, the tightening operation can be completed entirely in the external space. This achieves convenient installation and visual maintenance of the bogie frame 10 and the drive system 20. The operator can complete the bolt tightening operation without entering the cavity, significantly reducing the installation difficulty and time cost. The exposed end of the bolt rod 60 allows for direct observation of the connection status during daily inspections, avoiding the workload of disassembling the inspection hole. The multi-unit mounting base 30 forms a stable support system, ensuring that the load is evenly distributed at multiple connection points and improving structural reliability.

[0033] Optionally, the multi-unit mounting base 30 includes a nut seat 31 and a connector 33; multiple nut seats 31 are connected in series via the connector 33; and mounting nuts 50 are installed inside the nut seats 31.

[0034] The nut seat 31 is a load-bearing component used to accommodate the mounting nut 50. It can be implemented as a metal block structure with an inner cavity, the shape of which matches the outer contour of the mounting nut 50 to form a constraint. The connector 33 is a connecting component used to connect multiple nut seats 31 in series. It can be implemented as a rod-shaped or plate-shaped metal component, and the multiple nut seats 31 are rigidly connected to form an integral structure.

[0035] Specifically, multiple nut seats 31 are connected in series via connectors 33, forming an integrated installation unit within the cavity of the frame 10. The mounting nuts 50 are pre-fixed within the nut seats 31. During installation, the multi-unit mounting base 30 is simply positioned to the preset position within the cavity of the frame 10 to achieve synchronous positioning of multiple mounting points. This structure integrates the dispersed nut seats 31 into a continuously arranged assembly, avoiding the need to adjust the nut positions individually in a confined space, and also preventing the multi-unit mounting base 30 from rotating along with the bolt rod 60. In this embodiment, multiple nut seats 31 are connected in series via connectors 33, allowing for the fixing of multiple nuts with a single positioning during installation, significantly reducing the number of operations within the cavity. This solves the problem of insufficient operating space when installing nuts 50 individually within the enclosed cavity of the bogie frame 10. The series structure of the multi-unit mounting base 30 allows multiple nuts to be arranged in a compact space, enabling operators to position the entire installation unit without entering the cavity, and facilitating centralized observation of the nut status during subsequent maintenance.

[0036] Optionally, the connector 33 is a connecting rod, and the nut seat 31 is integrally cast with the connecting rod or fixed by welding.

[0037] The connecting rod refers to a rod-shaped structure with bending resistance, which can be made of metal through casting or forging processes. It is used to connect multiple nut seats 31 in series and maintain their relative positional relationship. The integral casting or welding fixation refers to the formation of a non-detachable connection between the nut seat 31 and the rigid connecting rod through the solidification of molten metal or high-temperature welding. This can be achieved using mold casting or arc welding processes, and is used to eliminate assembly gaps in split structures and improve the overall structural stability.

[0038] Specifically, when a multi-unit mounting base 30 is installed within the cavity of the frame 10, the rigid connecting rod is integrated with the nut seat 31 through integral molding or welding to form a continuous rigid frame. For example, casting can mold multiple nut seats 31 and connecting rods as a single component, avoiding positioning errors caused by separate assembly; welding can form a fixed connection between the prefabricated nut seats 31 and connecting rods, ensuring that the mounting base maintains positional accuracy in a confined space. Thus, when the multi-unit mounting base 30 is subjected to bolt preload or vehicle vibration, the rigid connection structure can prevent nut deflection or loosening due to local deformation.

[0039] Optionally, the nut seat 31 has a nut groove 32; the mounting nut 50 is embedded in the nut groove 32.

[0040] The nut groove 32 refers to a recessed structure on the nut seat 31 used to accommodate the mounting nut 50. Specifically, the groove can be formed on the surface of the nut seat 31 by machining or casting. The mounting nut 50 being embedded in the nut groove 32 means that the mounting nut 50 is embedded in the groove and fixed by the constraint of the groove wall. Specifically, this can be achieved by interference fit or snap-fit.

[0041] Specifically, the nut seat 31, by creating a nut groove 32, allows the mounting nut 50 to be confined to a specific position within the groove. During installation, the mounting nut 50 is pre-embedded in the nut groove 32, eliminating the need for manual adjustment of the nut's position or the use of additional tools in confined spaces. The groove wall of the nut groove 32 provides physical constraint on the circumference of the mounting nut 50, preventing it from rotating when the bolt shank 60 is screwed in. During maintenance and inspection, because the mounting nut 50 is fixed within the groove, maintenance personnel can directly determine whether there is any looseness or misalignment by observing the position of the mounting nut 50 within the nut groove 32.

[0042] Optionally, two of the opposite outer walls of the mounting nut 50 are fitted against the groove wall of the nut groove 32 to restrict the rotation of the mounting nut 50 within the nut groove 32.

[0043] The nut groove 32 refers to the recessed area set on the nut seat 31. Specifically, it can be implemented by a rectangular groove or an irregular groove. The groove wall forms a fitting gap with the outer wall of the mounting nut 50, and the gap size can be controlled within the range of 0.05-0.2 mm.

[0044] Specifically, when the mounting bolt 60 is tightened, the symmetrical outer wall of the mounting nut 50 forms surface contact with the corresponding groove wall of the nut groove 32. The frictional torque generated by this surface contact can counteract the rotational torque generated during bolt tightening, keeping the mounting nut 50 stationary during the tightening process. For example, when a hexagonal nut is used, its two sets of parallel opposite sides fit against the straight groove wall of the nut groove 32, forming a stable anti-rotation structure, allowing the operator to tighten the bolt without using a wrench.

[0045] Optionally, a limiting groove is formed in the groove wall of the nut groove 32; the mounting nut 50 is installed in the limiting groove.

[0046] The limiting groove refers to a continuous or intermittent annular groove structure formed by the indentation of the side wall of the nut groove 32. It can be machined or cast simultaneously during the forming stage of the nut seat 31. Its depth and width match the external dimensions of the mounting nut 50, constraining the circumferential freedom of the mounting nut 50 within the groove. Installing the mounting nut 50 within the limiting groove means embedding the outer circumferential surface of the mounting nut 50 into the limiting groove. Geometric interference is formed through the contact surface between the side wall of the limiting groove and the mounting nut 50, which can be achieved through press-fitting or interference fit. This restricts the rotation of the mounting nut 50 during tightening.

[0047] Specifically, during the machining of the nut seat 31, a limiting groove is pre-set in the groove wall, and the mounting nut 50 is directly positioned by the geometric constraint of the limiting groove. During the screwing of the bolt rod 60 into the mounting nut 50, the side wall of the limiting groove contacts the outer wall of the mounting nut 50, preventing the mounting nut 50 from rotating due to the rotational torque of the bolt rod 60. This avoids the need for an additional wrench to tighten the nut in traditional installation methods. During maintenance, the visibility of the limiting groove allows maintenance personnel to quickly determine whether the mounting nut 50 has shifted or loosened without disassembling the component, using visual inspection or simple tools.

[0048] Optionally, a limiting hole is provided at the bottom or wall of the nut groove 32; a recess is provided at the corresponding position of the mounting nut 50; an elastic limiting element is provided in the limiting hole or recess; the elastic limiting element protrudes to be engaged in the recess or limiting hole.

[0049] The limiting hole refers to a hole structure formed in the bottom or wall of the nut groove 32, which can be implemented as a through hole or a blind hole, used to accommodate the fixed end of the elastic limiting component. The recess refers to a recessed area on the outer surface of the mounting nut 50, which can be formed by machining, used to mate with the protruding part of the elastic limiting component. The elastic limiting component refers to a limiting element with elastic deformation capability, which can be implemented as a spring steel sheet or a rubber column, and part of its structure can be embedded in the limiting hole or recess to restrict the rotation of the mounting nut 50 through elastic force.

[0050] Specifically, when the mounting nut 50 is embedded in the nut groove 32 of the multi-mount base 30, the protruding part of the elastic limiting member is deformed under pressure. When the nut reaches the preset position, the elastic limiting member springs back and locks into the recess or limiting hole. For example, when the elastic limiting member is a spring steel sheet, its bent part is embedded in the recess, forming a mechanical lock; when the elastic limiting member is a rubber column, its compressed part returns to its original shape and fills the gap of the limiting hole. Thus, the mounting nut 50 is restricted from circumferential rotation in the nut groove 32, but can be disassembled by overcoming the resistance of the elastic limiting member with external force. This solves the problem of difficulty in detecting nut loosening in a closed cavity. The locking state of the elastic limiting member can directly reflect the tightness of the nut. During maintenance, it is only necessary to observe whether the elastic limiting member has disengaged from the limiting hole or recess to complete the inspection, which significantly improves maintenance efficiency and connection reliability.

[0051] Optionally, the number of multi-unit mounting bases 30 is not less than two, and the not less than two multi-unit mounting bases 30 are distributed at circumferential intervals along the connecting flange 40.

[0052] The circumferential spacing distribution refers to the arrangement of multiple multi-unit mounting seats 30 around the circumference of the connecting flange 40 at a certain interval. Specifically, it can be arranged in a uniform or non-uniform interval manner. For example, a multi-unit mounting seat 30 can be set every 90 degrees or 120 degrees. Its function is to balance the bolt tightening force through symmetrical layout and avoid local stress concentration.

[0053] Specifically, within the cavity of the bogie frame 10, at least two multi-mount brackets 30 are arranged around the connecting flange 40. Each multi-mount bracket 30 includes multiple nut seats 31 connected in series to secure the corresponding mounting nuts 50. Through circumferential distribution, the tightening force of the bolt shanks 60 is evenly transmitted to the connecting flange 40 and the drive system 20, thereby reducing the load on individual mounting points. For example, when three multi-mount brackets 30 are distributed at 120-degree intervals, each bracket bears one-third of the total load, thus reducing the risk of wear on individual nut seats 31. Furthermore, the circumferential distribution design allows for optimized installation paths within a limited space, avoiding interference between the operating tools and the inner wall of the frame 10. This embodiment, through the circumferential distribution of multiple multi-mount brackets 30, distributes the load to different areas while simplifying the installation process. Operators do not need to repeatedly adjust tool angles in confined spaces; they only need to tighten the bolts sequentially at preset intervals. This design solves the problems of uneven load distribution and operational difficulties caused by the single installation point in traditional bogie connection structures. It achieves uniform distribution of bolt tightening force, improves connection reliability and maintenance efficiency, and reduces the risk of structural failure caused by local stress concentration.

[0054] Optionally, the end of the bolt rod 60 extending outside the drive system 20 is provided with an anti-loosening structure, which is a double nut structure or a threaded section coated with thread-locking adhesive.

[0055] The anti-loosening structure refers to a device used to prevent the bolt shank 60 from loosening due to vibration or load changes. This can be achieved through double-nut stacking or thread surface curing bonding, maintaining the stability of the threaded connection through mechanical locking or chemical bonding. The double-nut structure refers to two nuts being screwed sequentially onto the threaded section of the bolt shank 60. This can be achieved by stacking two standard hexagonal nuts, creating a self-locking effect through the interaction between the two nuts. The thread-locking adhesive refers to a liquid curing adhesive applied to the threaded surface of the bolt shank 60. This can be achieved using an anaerobic thread-locking adhesive, which fills the thread engagement gap and cures to form a shear-resistant adhesive layer.

[0056] Specifically, after the bolt shank 60 penetrates the outer wall of the frame 10, the connecting flange 40, and the drive system 20, its threaded section extending to the mounting hole of the drive system 20 is configured as an anti-loosening structure. When a double-nut structure is used, the two nuts are tightened sequentially at the ends of the threaded section, and the friction generated by their mutual compression prevents relative rotation of the threaded pair; when thread-locking adhesive is used, the adhesive cures in the thread engagement gap to form a rigid filling layer, suppressing the slight displacement of the threaded pair caused by vibration.

[0057] In some specific embodiments, the two nuts in the double-nut structure can have different thicknesses or different tooth profiles, such as a combination of a thin anti-loosening nut and a standard thick nut; the thread-locking adhesive can cover at least three turns of thread at the end of the threaded section, for example, uniformly applying adhesive within a 5-8 mm length from the end of the bolt shank 60. This embodiment enables visual inspection of the anti-loosening structure, eliminating maintenance blind spots caused by enclosed spaces in traditional solutions, while avoiding tool interference when operating the anti-loosening device in confined spaces, significantly reducing the time cost and operational risks of maintenance work.

[0058] An embodiment of this utility model also discloses a vehicle bogie, including the bolt mounting structure described above.

[0059] The advantages of the vehicle bogie in this embodiment compared to the prior art are the same as those of the bolt-mounted structure described above, and will not be repeated here.

[0060] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A bolt-mounted structure applied to a vehicle bogie, the vehicle bogie comprising a frame (10) and a drive system (20); characterized in that, The bolt mounting structure includes a connecting flange (40), a multi-unit mounting base (30), a mounting nut (50), and a bolt shank (60); the connecting flange (40) is located between the frame (10) and the drive system (20); the multi-unit mounting base (30) is located in the cavity of the frame (10), and the mounting nut (50) is located on the multi-unit mounting base (30); the bolt shank (60) penetrates the outer wall of the frame (10), the connecting flange (40), and the drive system (20), with one end cooperating with the mounting nut (50) and the other end extending to the outside of the mounting hole of the drive system (20) housing.

2. The bolt mounting structure according to claim 1, characterized in that, The multi-unit mounting base (30) includes a nut seat (31) and a connector (33); multiple nut seats (31) are connected in series via the connector (33); the mounting nut (50) is installed in the nut seat (31).

3. The bolt mounting structure according to claim 2, characterized in that, The connecting member (33) is a connecting rod, and the nut seat (31) is integrally cast with the connecting rod or fixed by welding.

4. The bolt mounting structure according to claim 2, characterized in that, The nut seat (31) has a nut groove (32); the mounting nut (50) is embedded in the nut groove (32).

5. The bolt mounting structure according to claim 4, characterized in that, Two of the opposite outer walls of the mounting nut (50) are fitted against the groove wall of the nut groove (32) to restrict the mounting nut (50) from rotating within the nut groove (32).

6. The bolt mounting structure according to claim 4, characterized in that, The groove wall of the nut groove (32) is provided with a limiting groove; the mounting nut (50) is installed in the limiting groove.

7. The bolt mounting structure according to claim 4, characterized in that, The bottom or wall of the nut groove (32) has a limiting hole; the corresponding position of the mounting nut (50) has a recess; an elastic limiting member is provided in the limiting hole or the recess; the elastic limiting member protrudes to be inserted into the recess and / or the limiting hole.

8. The bolt mounting structure according to claim 1, characterized in that, The number of the multi-unit mounting bases (30) is not less than two, and the not less than two multi-unit mounting bases (30) are distributed at circumferential intervals along the connecting flange (40).

9. The bolt mounting structure according to any one of claims 1-8, characterized in that, The bolt rod (60) is provided with an anti-loosening structure at one end extending outside the drive system (20). The anti-loosening structure is a double nut structure or a threaded section coated with thread locking adhesive.

10. A vehicle bogie, characterized in that, Includes the bolt-mounted structure as described in any one of claims 1 to 9.

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