Axle end cable bracket structure having high vibration resistance performance

Abstract

The present invention relates to the technical field of urban rail vehicles, and provides an axle end cable bracket structure having high vibration resistance performance. The axle end cable bracket structure comprises a mounting surface, a bearing surface, a first side surface and a second side surface. The mounting surface and the bearing surface are oppositely arranged, and the first side surface and the second side surface are oppositely arranged. Two ends of the mounting surface are respectively connected to the first side surface and the second side surface, and two ends of the bearing surface are respectively connected to the first side surface and the second side surface. The side where the second side surface is located is taken as the left side, and the side where the first side surface is located is taken as the right side. A weight-reducing elongated hole is formed in the first side surface. The upper portion of the second side surface is flush with the upper portion of the first side surface, and the lower portion of the second side surface is higher than the lower portion of the first side surface. The present invention aims to solve the problems in the prior art of poor vibration resistance performance and easy breakage. The following properties can be mainly implemented: the static strength and quasi-static fatigue strength verification can meet the requirements of the standard BS EN 13749, and the random vibration fatigue strength verification meets the requirements of the standard GB / T 21563.

Description

A shaft end cable bracket structure with high vibration resistance Technical Field

[0001] The present invention relates to the technical field of urban rail vehicles, and in particular to an axle-end cable bracket structure with high vibration resistance. Background Art

[0002] Bogies are a crucial component of urban rail vehicles. Cable brackets are designed at the ends of their axleboxes to support and secure the axle-end cables, ensuring proper operation. However, existing axle-end cable brackets often suffer from poor vibration resistance and are prone to breakage due to track impact and random vibration during operation, impacting vehicle safety and reliability.

[0003] An existing shaft-end cable bracket, shown in Figures 1 and 2, is a bent plate bracket. It is constructed from Q235 steel, bent into shape, and pre-tightened with bolts to the bottom of the axlebox. While this cable bracket meets the requirements of BS EN 13749 through static and quasi-static fatigue strength checks, random vibration fatigue analysis reveals that the maximum sum of damage in the vertical, transverse, and longitudinal directions reaches 105.2, far exceeding 1. This indicates that the total damage to the structure in random vibration simulations far exceeds the level of destruction, failing to meet the requirements of GB / T 21563.

[0004] Another existing axle-end cable bracket, shown in Figures 3 and 4, is a welded bracket. It is constructed from Q345E steel plates, welded together, and pre-tightened with bolts to the bottom of the axlebox. Although this cable bracket meets the requirements of BS EN 13749 through static and quasi-static fatigue strength checks, random vibration fatigue analysis reveals that the maximum sum of vertical, transverse, and longitudinal damage reaches 24.2, which is greater than 1. This indicates that the total damage to the structure in random vibration simulations has reached the point of destruction, failing to meet the requirements of GB / T 21563.

[0005] Summary of the Invention

[0006] In response to the aforementioned issues of poor vibration resistance and susceptibility to breakage in existing cable supports, a novel axle-end cable support structure with high vibration resistance is provided. This invention primarily provides an axle-end cable support for urban rail vehicle bogies with high vibration resistance, achieving the following performance: static strength and quasi-static fatigue strength tests meet the requirements of BS EN 13749, and random vibration fatigue strength tests meet the requirements of GB / T 21563.

[0007] The technical means adopted in the present invention are as follows:

[0008] A shaft-end cable bracket structure with high vibration resistance includes a mounting surface, a bearing surface, a first side surface, and a second side surface. The mounting surface and the bearing surface are arranged opposite to each other, the first side surface and the second side surface are arranged opposite to each other, two ends of the mounting surface are connected to the first side surface and the second side surface respectively, and two ends of the bearing surface are connected to the first side surface and the second side surface respectively.

[0009] The direction of the second side surface is considered as the left, and the direction of the first side surface is considered as the right;

[0010] A connecting hole is provided on the mounting surface, and the shaft-end cable support structure with high vibration resistance is connected to the shaft box body through the connecting hole, and a first weight-reducing arc area is provided on the mounting surface on the left side of the connecting hole;

[0011] An inwardly concave process groove is provided on the upper portion of the right side of the bearing surface, a process hole is provided on the lower portion of the process groove, and a cable clamp elongated hole is provided on the surface of the left side of the bearing surface; a second weight-reducing arc area is provided on the bearing surface to the left of the cable clamp elongated hole;

[0012] The first side surface is provided with a weight-reducing elongated hole;

[0013] The upper portion of the second side surface is flush with the upper portion of the first side surface, and the lower portion of the second side surface is higher than the lower portion of the first side surface.

[0014] Furthermore, the mounting surface, the bearing surface, the first side surface and the second side surface are designed as an integrated structure.

[0015] Furthermore, the connection between the mounting surface and the first side surface and the second side surface is a rounded structure, and the connection between the bearing surface and the first side surface and the second side surface is a rounded structure.

[0016] Furthermore, the shaft-end cable support structure with high vibration resistance is made of square steel.

[0017] Furthermore, the number of the connecting holes is two, and they are arranged one above the other.

[0018] Furthermore, the cable clamp elongated hole is arranged obliquely, the upper portion of the cable clamp elongated hole is close to the second side surface, and the lower portion of the cable clamp elongated hole is close to the first side surface.

[0019] Furthermore, the arc radius of the first weight-reducing arc zone is 30 mm, and the arc radius of the second weight-reducing arc zone is 10 mm.

[0020] Furthermore, the process groove and the process hole are used to install the connecting bolt using a sleeve.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The invention solves the problems of poor vibration resistance and easy breakage in the existing technology of the axle end cable bracket of the urban railway vehicle bogie.

[0023] This bracket is made of rectangular tubing, eliminating the need for welding and offering the advantages of low cost and excellent manufacturability. Through simulation-optimized structural design, it achieves modal frequency avoidance and lightweight design while ensuring sufficient rigidity and strength. Furthermore, the design utilizes all-base metal processing without welding, resulting in minimal cumulative damage from random vibration, excellent vibration resistance, and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative labor.

[0025] FIG1 is an assembly diagram of a first conventional shaft-end cable bracket.

[0026] FIG2 is a structural diagram of a first conventional shaft-end cable bracket.

[0027] FIG3 is an assembly diagram of a second conventional shaft-end cable bracket.

[0028] FIG4 is a structural diagram of a second conventional shaft-end cable bracket.

[0029] FIG5 is an assembly diagram of the shaft-end cable bracket of the present invention.

[0030] FIG6 is a schematic diagram of the cable support structure according to the present invention from a first angle.

[0031] FIG. 7 is a second perspective view of the cable support structure of the present invention.

[0032] FIG8 is a schematic diagram of the cable support structure from a third angle of the present invention.

[0033] In the figure: 1. Installation surface; 2. Bearing surface; 3. First side surface; 4. Second side surface; 5. Connection hole; 6. Axle box body; 7. First weight-reducing arc area; 8. Process groove; 9. Process hole; 10. Cable clamp strip hole; 11. Second weight-reducing arc area; 12. Weight-reducing strip hole. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0038] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0040] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] As shown in Figures 5-8, the present invention provides a shaft-end cable bracket structure with high vibration resistance, characterized in that it includes a mounting surface 1, a bearing surface 2, a first side surface 3, and a second side surface 4. The mounting surface 1 is arranged opposite to the bearing surface 2, and the first side surface 3 is arranged opposite to the second side surface 4. The two ends of the mounting surface 1 are respectively connected to the first side surface 3 and the second side surface 4, and the two ends of the bearing surface 2 are respectively connected to the first side surface 3 and the second side surface 4. The mounting surface 1, the bearing surface 2, the first side surface 3, and the second side surface 4 are designed as an integrated structure. The connection between the mounting surface 1 and the first side surface 3 and the second side surface 4 is a rounded structure, and the connection between the bearing surface 2 and the first side surface 3 and the second side surface 4 is also a rounded structure.

[0042] The direction of the second side surface 4 is considered left, and the direction of the first side surface 3 is considered right;

[0043] The mounting surface 1 is provided with two connection holes 5, arranged one above the other. The highly vibration-resistant shaft-end cable support structure is connected to the shaft housing 6 via the connection holes 5 and is pre-tightened with bolts mounted on the raised seat on the side of the shaft housing 6. A first weight-reducing arc area 7 is provided on the mounting surface 1 to the left of the connection hole 5.

[0044] An inwardly recessed process groove 8 is provided on the upper portion of the right side of the bearing surface 2, and a process hole 9 is provided below the process groove 8. The process groove 8 and process hole 9 are used to install connecting bolts using sleeves and reduce the overall mass of the bracket. A cable clip slot 10 is provided on the surface of the left side of the bearing surface 2. The cable clip slot 10 is arranged at an angle, with the upper portion of the cable clip slot 10 close to the second side surface 4 and the lower portion of the cable clip slot 10 close to the first side surface 3. A second weight-reducing arc area 11 is provided on the bearing surface 2 to the left of the cable clip slot 10.

[0045] The first side surface 3 is provided with a weight-reducing elongated hole 12, which is used to reduce the total mass of the bracket while ensuring that the entire bracket structure meets the vibration strength requirements;

[0046] The upper portion of the second side surface 4 is flush with the upper portion of the first side surface 3 , and the lower portion of the second side surface 4 is higher than the lower portion of the first side surface 3 .

[0047] The shaft end cable support structure with high vibration resistance adopts square steel profile 110×50×6.

[0048] The arc radius of the first weight-reducing arc zone 7 is 30 mm, which is used to reduce the total mass of the bracket while ensuring that the entire bracket structure meets the vibration strength requirements; the arc radius of the second weight-reducing arc zone 11 is 10 mm, which is used to reduce the total mass of the bracket while ensuring that the entire bracket structure meets the vibration strength requirements;

[0049] The process groove 8 and the process hole 9 are used to install the connecting bolt using a sleeve.

[0050] The static strength analysis of the shaft-end cable support structure with high vibration resistance of the present invention is as follows:

[0051] Through static strength analysis, the maximum stress of the bracket structure under static strength conditions is 262.8MPa, which is less than the allowable stress of 309MPa of the material in Table 1, indicating that the static strength meets the requirements of standard BS EN 13749.

[0052] Table 1 Mechanical properties of materials

[0053] The quasi-static fatigue strength analysis of the shaft-end cable support structure with high vibration resistance of the present invention is as follows:

[0054] Through quasi-static fatigue strength analysis, the maximum utilization rate of the stress amplitude of all nodes of the bracket structure is 0.51, indicating that the maximum and minimum stress values ​​are within the fatigue limit range determined by the Goodman curve, indicating that the fatigue strength meets the requirements of the standard BS EN 13749.

[0055] The random vibration fatigue analysis of the shaft-end cable support structure with high vibration resistance of the present invention is as follows:

[0056] Through random vibration fatigue analysis, the maximum sum of the three-dimensional damage of the bracket structure is 0.18, which is much less than 1. This shows that the total damage in the random vibration fatigue simulation does not reach the level of destruction and meets the requirements of the standard GB / T 21563.

[0057] 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 above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shaft end cable support structure with high vibration resistance, characterized in that: The device comprises a mounting surface (1), a bearing surface (2), a first side surface (3) and a second side surface (4); the mounting surface (1) and the bearing surface (2) are arranged opposite to each other, the first side surface (3) and the second side surface (4) are arranged opposite to each other, two ends of the mounting surface (1) are respectively connected to the first side surface (3) and the second side surface (4), and two ends of the bearing surface (2) are respectively connected to the first side surface (3) and the second side surface (4); The direction of the second side surface (4) is regarded as the left, and the direction of the first side surface (3) is regarded as the right; The mounting surface (1) is provided with a connection hole (5), the shaft end cable support structure with high vibration resistance is connected to the shaft box (6) through the connection hole (5), and a first weight-reducing arc area (7) is provided on the mounting surface (1) on the left side of the connection hole (5); An inwardly recessed process groove (8) is provided on the upper portion of the right side of the bearing surface (2), a process hole (9) is provided on the lower portion of the process groove (8), and a cable clamping strip hole (10) is provided on the surface of the left side of the bearing surface (2); a second weight-reducing arc area (11) is provided on the bearing surface (2) on the left side of the cable clamping strip hole (10); The first side surface (3) is provided with a weight-reducing elongated hole (12); The upper height of the second side surface (4) is flush with the upper height of the first side surface (3), and the lower height of the second side surface (4) is higher than the lower height of the first side surface (3).

2. The shaft end cable support structure with high vibration resistance according to claim 1, characterized in that: The mounting surface (1), the bearing surface (2), the first side surface (3) and the second side surface (4) are of integrated structural design.

3. The shaft end cable support structure with high vibration resistance according to claim 1, characterized in that: The connection between the mounting surface (1) and the first side surface (3) and the second side surface (4) is a rounded structure, and the connection between the bearing surface (2) and the first side surface (3) and the second side surface (4) is a rounded structure.

4. The shaft end cable support structure with high vibration resistance according to claim 1, characterized in that: The shaft end cable support structure with high vibration resistance is made of square steel.

5. The shaft end cable support structure with high vibration resistance according to claim 1, characterized in that: The number of the connecting holes (5) is two, which are arranged vertically.

6. The shaft end cable support structure with high vibration resistance according to claim 1, characterized in that: The cable clamp elongated hole (10) is arranged obliquely, the upper portion of the cable clamp elongated hole (10) is close to the second side surface (4), and the lower portion of the cable clamp elongated hole (10) is close to the first side surface (3).

7. The shaft end cable support structure with high vibration resistance according to claim 1, characterized in that: The arc radius of the first weight-reducing arc zone (7) is 30 mm, and the arc radius of the second weight-reducing arc zone (11) is 10 mm.

8. The shaft end cable support structure with high vibration resistance according to claim 1, characterized in that: The process groove (8) and the process hole (9) are used to install the connecting bolt using a sleeve.

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