Cable fixing structure and rail transit vehicle

Abstract

The utility model discloses a cable fixing structure and a rail transit vehicle, and relates to the technical field of vehicle manufacturing. The wire clamp support is connected with the mounting rack, the wire clamp support comprises two assembling rings which are connected with each other, and the assembling rings are combined to form a closed ring shape; the limiting rolling ball is arranged on the circumferential inner side of the assembling ring in a rolling mode, and a fixing hole is formed in the axis position of the limiting rolling ball. According to the cable fixing structure, the technical problem that the tail end of a cable outlet point is prone to breakage due to large stress caused by the fact that the cable is continuously stressed in the movement process and fixing points at the two ends of the cable are located at improper outlet angles in the relative movement process is solved, and the limiting rolling ball adjusts the posture of the cable according to the stress direction of the cable; therefore, the cable outlet angle of the cable fixing point is adjusted, small-amplitude optimization of the length of the cable is achieved, the stress condition of the dynamic cable is improved, the cable outlet point position of the cable is prevented from being broken due to large stress, and the effect of protecting the cable is achieved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to a cable fixing structure and a rail transit vehicle. Background Technology

[0002] When rail transit vehicles are in operation, there is relative displacement between vehicles and between the car body and the bogie. The connecting cables at these locations differ from those at other locations because their two fixed points are in relative motion, experiencing periods of tension and compression. These cables are called dynamically installed cables, or simply dynamic cables. Because the relative positions of the fixed points at both ends of a dynamic cable are constantly changing, the length of the dynamic cable must be precisely defined. This ensures that when the fixed points are at their farthest distance, the cable length is long enough to prevent damage to the cable or other components due to tension, while simultaneously ensuring that when the fixed points are at their closest distance, the cable is short enough to avoid excessive space occupation in one direction due to cable compression, which could interfere with other components or exceed limits.

[0003] However, the relative displacement of the fixed points at both ends of the dynamic cable also causes changes in the outlet angle. The dynamic cable itself is constantly under stress during movement, and the relative movement of the fixed points can easily place it at an unsuitable outlet angle, resulting in significant stress at the outlet ends. During long-term vehicle operation, cable fatigue can lead to breakage. Therefore, a cable fixing structure and a rail transit vehicle designed to address these problems are proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a cable fixing structure and rail transit vehicle, which solves the technical problem that the cable itself is constantly subjected to force during movement, and the fixing points at both ends of the cable are easily placed at an unsuitable exit angle during relative movement, resulting in fatigue problems and breakage of the cable exit point end after long-term exposure to large stress.

[0005] To achieve the above objectives, this utility model provides a cable fixing structure, comprising:

[0006] Mounting rack;

[0007] A wire clamp bracket, connected to the mounting bracket, the wire clamp bracket comprising: two interconnected assembly rings, the assembly rings being combined to form a closed ring shape;

[0008] A limiting ball is rolled inside the circumference of the assembly ring, and a fixing hole for the cable body to pass through is provided at the axial position of the limiting ball.

[0009] Preferably, the inner surface of the assembly ring is spherical, the limiting ball is ellipsoidal in shape, and the inner surface of the assembly ring abuts against the outer surface of the limiting ball.

[0010] Preferably, the inner diameter of the assembly ring gradually decreases along the direction from the middle part of the assembly ring towards both ends of the assembly ring.

[0011] Preferably, the outer surface of the limiting ball has two symmetrical end faces, and the inner diameter of the assembly ring gradually decreases along the direction from the middle part of the limiting ball to the two end faces of the limiting ball.

[0012] Preferably, when the assembly ring is coaxial with the fixing hole, both end faces of the limiting ball protrude from both end faces of the assembly ring.

[0013] Preferably, the limiting ball is composed of two hemispheres with identical structures joined together.

[0014] Preferably, the two ends of the assembly ring are integrally provided with hanging ears, the side of the hanging ears is provided with a through first connecting hole, the end of the mounting bracket is provided with a through second connecting hole, and the bolt passes through the first connecting hole and the second connecting hole to fix the wire clamp bracket on the mounting bracket.

[0015] Preferably, the two ends of the fixing hole are provided with rounded corners.

[0016] Preferably, the mounting bracket is Z-shaped, and the lower end of the mounting bracket is provided with an assembly groove, which is used to provide installation space for the wire clamp bracket.

[0017] A rail transit vehicle comprising a cable fixing structure as described in any of the preceding claims.

[0018] Compared to the aforementioned background technology, the cable fixing structure provided by this utility model has the following beneficial effects: After the limiting ball is fixed on the cable, it is confined to the inner side of the two interconnected assembly rings by the cooperation of two assembly rings, so as to limit the cable to a certain extent. When the cable is subjected to external forces in different directions, the limiting ball will adjust its own posture according to the direction of the force on the cable, thereby adjusting the exit angle of the cable fixing point, so that the cable can achieve a certain degree of automatic adjustment under stress. By adjusting the angle of the limiting ball at both ends of the cable, the cable length can be optimized slightly, the stress condition of the dynamic cable can be improved, and the cable exit point can be prevented from being broken due to large stress, thus protecting the cable and extending the service life of the dynamic cable. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 A three-dimensional structural diagram of the cable fixing structure provided in the embodiment of this utility model;

[0021] Figure 2 This is a side view of the cable fixing structure provided in an embodiment of the present utility model;

[0022] Figure 3 A side view of another structural state of the cable fixing structure provided in this embodiment of the utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the wire clamp bracket provided in an embodiment of the present utility model.

[0024] Specifically, 1-mounting bracket; 101-assembly slot; 2-wire clamp bracket; 201-assembly ring; 202-hanging ear; 3-limiting ball; 301-fixing hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1 As shown, to achieve the above objectives, this utility model provides a cable fixing structure, including: a mounting frame 1 and a wire clamp bracket 2 disposed on the mounting frame 1. The mounting frame 1 is fixedly mounted on two locomotives requiring cable connection, or it can be mounted on the car body and bogie requiring cable connection. The specific installation position of the mounting frame 1 is not limited; its purpose is to ensure that the mounting frame 1 is positioned at the cable outlet point on two devices with relative movement.

[0028] The mounting bracket 1 is connected to the cable clamp bracket 2 by bolts. The cable clamp bracket 2 is mainly used to fix the cable. Specifically, the cable clamp bracket 2 includes two interconnected assembly rings 201. The assembly rings 201 are combined to form a closed ring shape. The middle part of the assembly rings 201 is semi-circular, and the two ends of the assembly rings 201 are flat. After the two ends of the assembly rings 201 are joined together, the middle part of the two assembly rings 201 will form a closed circular ring.

[0029] A limiting ball 3 is provided on the inner circumferential side of the assembly ring 201. Through tolerance fitting, the limiting ball 3 is prevented from coming out of the wire clamp bracket 2, while allowing it to rotate at a certain angle within the bracket. Furthermore, a fixing hole 301 for the cable body is provided at the axial position of the limiting ball 3. The fixing hole 301 is interference-fitted with the cable, preventing the limiting ball 3 from sliding relative to the cable along its axial direction, thus ensuring the limiting ball 3 is stably fitted onto the outer circumference of the cable. After the limiting ball 3 is fixed onto the cable, it is confined within the two interconnected assembly rings 201, providing a certain degree of cable restraint. When the cable is subjected to external forces in different directions, the limiting ball 3 adjusts its posture according to the direction of the force, improving the cable exit angle at the fixing point, reducing stress at the dynamic cable exit point, and alleviating dynamic cable fatigue. Preferably, the limiting ball 3 is composed of two hemispheres with identical structures, which makes it easier for the limiting ball 3 to be sleeved on the outer side of the cable, thereby improving the overall efficiency of the cable fixing structure for assembly and disassembly.

[0030] During installation, the mounting bracket 1 is fixed at the cable exit point on two devices with relative movement. Simultaneously, a limiting ball 3 is fitted onto the outer circumference of the cable exit point. Two assembly rings 201 are fitted onto the outer surface of the limiting ball 3, and the two ends of the assembly rings 201 are connected by bolts. The two assembly rings 201 combine to form a clamp bracket 2, with the limiting ball 3 confined within the circumferential inner side of the clamp bracket 2. When the two devices move relative to each other, the cable is subjected to external forces in different directions. The limiting ball 3 adjusts its posture according to the direction of the force on the cable, adjusting the exit angle of the cable fixing point. This achieves a slight optimization of the cable length, improves the stress condition of the dynamic cable, prevents breakage due to excessive stress at the cable exit point, protects the cable, and extends the service life of the dynamic cable.

[0031] like Figure 2 and Figure 3As shown, in one embodiment of this utility model, the inner surface of the assembly ring 201 is set as a spherical surface, and the limiting ball 3 is generally ellipsoidal. The inner surface of the assembly ring 201 abuts against the outer surface of the limiting ball 3 to ensure that the limiting ball 3 can rotate freely relative to the assembly ring 201 at a certain angle. When the limiting ball 3 rotates to a certain angle, the limiting ball 3 stops rotating, thereby ensuring that the cable will not be contacted and worn by the wire clamp bracket 2, thus protecting the cable and further improving the service life of the cable.

[0032] Of course, the limiting ball 3 can also be set as a ball shape. At the same time, a limiting part (not shown in the figure) is integrally set on both ends of the limiting ball 3. The limiting part protrudes from the outer side of the limiting ball 3. When the limiting ball 3 rotates to a certain angle, the limiting part will abut against the edge of the assembly ring 201, and stop the limiting ball 3 from continuing to rotate, preventing the cable from contacting the clamp bracket 2, avoiding the cable from being worn by the clamp bracket 2, and further protecting the cable.

[0033] It should be noted that the inner diameter of the assembly ring 201 gradually decreases from the middle part to both ends of the assembly ring 201. That is, the wire clamp bracket 2 is wider in the middle and the width of the wire clamp bracket 2 gradually shrinks at both ends along the arc. This ensures that after the wire clamp bracket 2 is fitted onto the outer side of the limiting ball 3, the limiting ball 3 will not come loose from the inner circumference of the wire clamp bracket 2, thus ensuring the structural stability of the overall cable fixing structure.

[0034] In addition, two end faces are symmetrically arranged on the outer surface of the limiting ball 3. Along the direction from the middle of the limiting ball 3 towards its two end faces, the inner diameter of the assembly ring 201 gradually decreases. That is, the limiting ball 3 is wider in the middle and its width gradually narrows at both ends along the arc. This allows the limiting ball 3 to fit into the wire clamp bracket 2, further ensuring that the limiting ball 3 will not loosen from the circumferential inner side of the wire clamp bracket 2, thus improving the structural stability of the overall cable fixing structure.

[0035] In one embodiment of this utility model, both end faces of the limiting ball 3 protrude from both end faces of the assembly ring 201. That is, when the axis of the assembly ring 201 is coaxial with the axis of the fixing hole 301 and the included angle between the axis of the assembly ring 201 and the axis of the fixing hole 301 is at its maximum value, the length of the limiting ball 3 is greater than the thickness of the assembly ring 201 along the direction from the middle part of the assembly ring 201 to both ends of the assembly ring 201. This ensures that the cable will never contact the wire clamp bracket 2 within the limited rotation angle range of the limiting ball 3, thereby ensuring that the cable will not be worn by the wire clamp bracket 2, thus protecting the cable and further improving the service life of the cable.

[0036] To prevent the limiting ball 3 from sliding relative to the cable along the cable axis, a positioning strip can be pre-fitted onto the outer circumference of the cable. The positioning strip is glued to the cable exit point and is compatible with it. A positioning groove is provided on the inner circumference of the limiting ball 3. After the limiting ball 3 is fitted onto the cable exit point, the positioning strip is further engaged with the positioning groove to further ensure that the limiting ball 3 can be stably fitted onto the outer circumference of the cable.

[0037] In one embodiment of this utility model, the two ends of the assembly ring 201 are integrally provided with hanging ears 202. The hanging ears 202 are generally flat. When the two assembly rings 201 are sleeved on the limiting ball 3, the facing sides of the two hanging ears 202 can fit together to improve the structural stability when the two assembly rings 201 are spliced. In addition, the side of the hanging ear 202 is provided with a through first connecting hole, and the end of the mounting bracket 1 is provided with a through second connecting hole. During specific assembly, the bolt passes through the first connecting hole and the second connecting hole. When the bolt passes through the first connecting hole on the two assembly rings 201, the two assembly rings 201 are combined to form a wire clamp bracket 2. At this time, the bolt also passes through the second connecting hole to fix the wire clamp bracket 2 on the mounting bracket 1.

[0038] Preferably, rounded corners are provided at both ends of the fixing hole 301. The rounded corners can further increase the angle adjustment range of the cable. When the angle of the limiting ball 3 is adjusted to the limit position, the cable can be further adjusted slightly at the rounded corner position, thereby increasing the angle adjustment range of the cable. Moreover, by providing rounded corners at both ends of the fixing hole 301, the friction force on the cable at the end position of the fixing hole 301 can be reduced, preventing the cable from being damaged due to long-term dynamic adjustment of its own angle, thus protecting the cable.

[0039] In one embodiment of this utility model, the mounting bracket 1 is Z-shaped. The Z-shaped mounting bracket 1 makes it easier for the wire clamp bracket 2 to be installed on the corresponding equipment. Of course, the mounting bracket 1 can also be set in other structural shapes. The purpose is to enable the wire clamp bracket 2 to be positioned and installed as required to adapt to the cable outlet point.

[0040] It should be noted that an assembly groove 101 is provided at the lower end of the mounting bracket 1. The assembly groove 101 provides installation space for the wire clamp bracket 2, ensuring the smooth installation of the wire clamp bracket 2. Moreover, a certain gap is reserved between the assembly groove 101 and the wire clamp bracket 2, so that the limiting ball 3 on the inner side of the wire clamp bracket 2 can rotate freely within a certain range, thereby flexibly adjusting the exit angle of the cable fixing point.

[0041] In use, the mounting bracket 1 is fixed at the cable exit point on two devices with relative movement. Simultaneously, a limiting ball 3 is fitted onto the outer circumference of the cable exit point. Two assembly rings 201 are fitted onto the outer surface of the limiting ball 3, and the two ends of the assembly rings 201 are connected by bolts. The two assembly rings 201 combine to form a cable clamp bracket 2, and the limiting ball 3 is confined to the circumferential inner side of the cable clamp bracket 2. When the devices at both ends of the two cables move relative to each other, the cable exit point is subjected to external forces in different directions. The limiting ball 3 adjusts its posture according to the direction of the force at the cable exit point, adjusting the exit angle of the cable fixing point, thus achieving dynamic adjustment of the cable exit angle, slightly shortening the required cable length, and improving cable space utilization.

[0042] In addition to the cable fixing structure described above, this utility model also provides a rail transit vehicle that includes the cable fixing structure disclosed in the above embodiments. For the structure of other parts of the rail transit vehicle, please refer to the prior art, which will not be described in detail here.

[0043] In summary, the limiting ball 3 adjusts its own posture according to the direction of force on the cable, thereby adjusting the exit angle of the cable fixing point, achieving a slight optimization of the cable length, improving the stress situation of the dynamic cable, preventing the cable from breaking due to excessive stress at the exit point, thus protecting the cable and extending the service life of the dynamic cable.

[0044] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0045] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A cable fixing structure, characterized in that, include: Mounting rack; A wire clamp bracket, connected to the mounting bracket, the wire clamp bracket comprising: two interconnected assembly rings, the assembly rings being combined to form a closed ring shape; A limiting ball is rolled inside the circumference of the assembly ring, and a fixing hole for the cable body to pass through is provided at the axial position of the limiting ball.

2. The cable fixing structure according to claim 1, characterized in that, The inner surface of the assembly ring is spherical, the limiting ball is ellipsoidal, and the inner surface of the assembly ring abuts against the outer surface of the limiting ball.

3. The cable fixing structure according to claim 2, characterized in that, The inner diameter of the assembly ring gradually decreases from the middle portion of the assembly ring towards both ends.

4. The cable fixing structure according to claim 3, characterized in that, The outer surface of the limiting ball has two symmetrical end faces, and the inner diameter of the assembly ring gradually decreases along the direction from the middle part of the limiting ball to the two end faces of the limiting ball.

5. A cable fixing structure according to claim 4, characterized in that, Both end faces of the limiting ball protrude from both end faces of the assembly ring.

6. A cable fixing structure according to claim 4, characterized in that, The limiting ball is composed of two hemispheres with identical structures joined together.

7. A cable fixing structure according to claim 1, characterized in that, The two ends of the assembly ring are integrally provided with hanging ears, and the side of the hanging ear is provided with a through first connecting hole. The end of the mounting bracket is provided with a through second connecting hole. The bolt passes through the first connecting hole and the second connecting hole to fix the wire clamp bracket on the mounting bracket.

8. A cable fixing structure according to claim 1, characterized in that, The two ends of the fixing hole are rounded.

9. A cable fixing structure according to claim 1, characterized in that, The mounting bracket is Z-shaped, and an assembly groove is provided at the lower end of the mounting bracket to provide installation space for the wire clamp bracket.

10. A rail transit vehicle, characterized in that, The cable fixing structure includes any one of claims 1-9 above.

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