Self-locking coupler knuckle capable of improving fatigue strength

Abstract

The utility model relates to the technical field of car couplers, and discloses a self-locking coupler knuckle capable of improving fatigue strength, which comprises a coupler knuckle main body, a coupler knuckle pin hole is arranged in the coupler knuckle main body in a penetrating manner, and a ventilation mechanism is arranged in a heat dissipation hole; the spiral flow guide groove is formed in the coupler knuckle protruding block, the spiral flow guide groove is used for forcing airflow to rotate to form vortex, the heat dissipation efficiency and the structural performance are remarkably improved, the spiral flow guide groove guides airflow to do spiral motion along the hole wall, the thickness of a boundary layer is damaged, and the heat conduction mode is converted into efficient turbulent mixing from low-efficiency molecular diffusion. The spiral track enables the actual flowing path of air flow in the hole to be prolonged by 30%-50%, the heat exchange time is prolonged, the coupler knuckle is particularly suitable for continuous heat dissipation in a low-heat-flux scene, the heat dissipation effect of the coupler knuckle is better, the situation that the fatigue strength is reduced due to long-time friction of the coupler knuckle protruding block is avoided, and therefore the practicability of the coupler knuckle in the using process is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of coupler technology, specifically to a self-locking coupler tongue that improves fatigue strength. Background Technology

[0002] The coupler tongue is the tongue-shaped component of the coupler. It is located at the head of the coupler and is connected to the coupler on the other side. The coupler tongues rotate directly due to the collision between them, which causes the two coupler tongues to restrict and grip each other. During the mutual restriction process, the two coupler tongues will have frequent contact and friction for a long time, making it the component most prone to fatigue damage.

[0003] For example, a coupler tongue and its application disclosed in CN105083315B include a coupler tongue traction surface. The coupler tongue traction surface is provided with a coupler tongue pin hole. The coupler tongue pin hole is composed of n sequentially connected circular holes with coincident centerlines and different diameters between adjacent segments, where n is an odd number greater than or equal to 5. The coupler tongue pin hole provided by this invention allows the fatigue strength on the inner wrist side of the coupler tongue to be adjusted accordingly according to the magnitude of the fatigue load it bears, which greatly alleviates the problem of unreasonable fatigue strength distribution on the inner wrist side of the coupler tongue traction surface, thereby greatly improving the fatigue life of the coupler tongue.

[0004] However, the aforementioned patent only uses a heat-conducting plate to pour air into the heat dissipation through-hole for heat dissipation. Since no spiral guide groove is opened inside the heat dissipation through-hole, the airflow disturbance inside the heat dissipation through-hole is insufficient. The airflow inside the through-hole is in a laminar state, and the boundary layer close to the hole wall is relatively thick. Heat conduction is mainly based on inefficient molecular diffusion, which makes it difficult to effectively remove heat from the hole wall. The airflow is prone to forming "dead volume" (such as corners or low-speed areas) inside the hole, resulting in local heat accumulation. This leads to low heat dissipation efficiency, reduces the fatigue strength of the self-locking hook tongue, and thus reduces the practicality of the storage and transportation vehicle in use.

[0005] Therefore, we propose a self-locking hook tongue to improve fatigue strength in order to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a self-locking hook tongue that improves fatigue strength, thereby solving the problem mentioned in the background art that the lack of a spiral guide groove inside the heat dissipation hole results in insufficient airflow disturbance inside the heat dissipation hole.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a self-locking hook tongue for improving fatigue strength, comprising a hook tongue body, a hook tongue pin hole through which the hook tongue body is provided, a hook tongue protrusion block installed at one end of the hook tongue body, the hook tongue body and the hook tongue protrusion block being an integral structure, a heat dissipation hole through which the hook tongue protrusion block is provided, and a ventilation mechanism being provided inside the heat dissipation hole;

[0008] The ventilation mechanism includes a connecting plate, heat-conducting blocks, support columns, spiral guide grooves, mounting platforms, rubber joints, and a metal frame. The connecting plate is located at the top and bottom of the heat dissipation holes. Multiple heat-conducting blocks are installed inside the heat dissipation holes. Support columns are installed between the heat-conducting blocks. Mounting platforms are installed at both the top and bottom of the support columns. A rubber joint is installed at the middle position of one end of each mounting platform. A metal frame is installed at one end of each rubber joint. One end of each metal frame is connected to one end of the connecting plate. Spiral guide grooves are formed inside the heat dissipation holes.

[0009] Preferably, mounting bases are installed on both sides of one end of the mounting platform, and a universal ball joint is provided inside the mounting base through a limiting ring, and a guide plate is installed at the top of the universal ball joint.

[0010] Preferably, two guide vanes are provided at one end of the installation platform, and both guide vanes are arc-shaped.

[0011] Preferably, the heat-conducting block has a fixing hole inside, and each fixing hole is provided with a heat dissipation fin.

[0012] Preferably, the fixing hole inside the heat-conducting block has a stepped design, with the fixing hole being larger at the top and smaller at the bottom.

[0013] Preferably, multiple fixing holes are provided inside the heat-conducting block, and the multiple fixing holes are distributed at equal intervals inside the heat-conducting block.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By creating a spiral guide groove inside the hook tongue protrusion, the spiral guide groove can generate vortices by forcing airflow to rotate, which significantly improves heat dissipation efficiency and structural performance. The spiral guide groove guides the airflow to move in a spiral motion along the hole wall, destroying the boundary layer thickness and changing the heat conduction mode from inefficient molecular diffusion to efficient turbulent mixing. The spiral trajectory extends the actual flow path of the airflow in the hole by 30% to 50%, increasing the heat exchange time. It is especially suitable for continuous heat dissipation in low heat flux density scenarios, making the heat dissipation effect of the hook tongue better and avoiding fatigue strength reduction caused by long-term friction of the hook tongue protrusion, thereby greatly improving the practicality of the hook tongue in use.

[0016] 2. By incorporating a fixing hole, rubber joint, metal frame, mounting base, universal ball joint, and guide plate, the fixing hole design utilizes the Venturi effect to accelerate fluid flow, enhance heat dissipation or cleaning effect, and improve heat dissipation efficiency. Compared with a constant diameter hole, the heat exchange coefficient is significantly improved. The design of the rubber joint and metal frame allows the connecting plate to swing slightly with the deformation of the hook tongue, avoiding stress concentration caused by rigid connection. The design of the mounting base, universal ball joint, and guide plate allows the guide plate to rotate in the horizontal or vertical direction, guiding the airflow to the inlet of the heat dissipation through hole and increasing the speed at which air enters the heat dissipation hole 4. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the ventilation mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall structure of the heat-conducting block of this utility model;

[0020] Figure 4 This is a schematic diagram of the overall structure of the guide plate of this utility model;

[0021] Figure 5 For the present utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0022] In the diagram: 1. Hook tongue body; 2. Hook tongue pin hole; 3. Hook tongue protrusion block; 4. Heat dissipation hole; 5. Connecting plate; 6. Heat conduction block; 7. Support column; 8. Spiral guide groove; 9. Fixing hole; 10. Heat dissipation fins; 11. Mounting platform; 12. Rubber joint; 13. Metal frame; 14. Mounting base; 15. Universal ball joint; 16. Guide plate. Detailed Implementation

[0023] 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.

[0024] Example 1

[0025] Please see Figure 1-5A self-locking hook tongue for improving fatigue strength includes a hook tongue body 1, a hook tongue pin hole 2 is provided through the interior of the hook tongue body 1, a hook tongue protrusion block 3 is installed at one end of the hook tongue body 1, the hook tongue body 1 and the hook tongue protrusion block 3 are integrally structured, a heat dissipation hole 4 is provided through the interior of the hook tongue protrusion block 3, and a ventilation mechanism is provided inside the heat dissipation hole 4.

[0026] In this embodiment, the ventilation mechanism includes a connecting plate 5, heat-conducting blocks 6, support columns 7, spiral guide grooves 8, mounting platforms 11, rubber joints 12, and a metal frame 13. The connecting plate 5 is disposed at the top and bottom of the heat dissipation hole 4. Multiple heat-conducting blocks 6 are installed inside the heat dissipation hole 4, and support columns 7 are installed between the heat-conducting blocks 6. Mounting platforms 11 are installed at both the top and bottom of the support columns 7. A rubber joint 12 is installed at the middle position of one end of the mounting platform 11, and a metal frame 13 is installed at one end of each rubber joint 12. One end of each metal frame 13 is connected to one end of the connecting plate 5. A spiral guide groove 8 is formed inside the heat dissipation hole 4 to guide airflow. The groove 8 can form a vortex by forcing the airflow to rotate, which significantly improves the heat dissipation efficiency and structural performance. The spiral guide groove 8 guides the airflow to move in a spiral motion along the hole wall, destroying the boundary layer thickness and changing the heat conduction mode from inefficient molecular diffusion to efficient turbulent mixing. The spiral trajectory extends the actual flow path of the airflow in the hole by 30% to 50%, increasing the heat exchange time. It is especially suitable for continuous heat dissipation in low heat flux density scenarios, making the heat dissipation effect of the hook tongue better and avoiding the fatigue strength reduction caused by long-term friction of the hook tongue protrusion 3. This greatly improves the practicality of the hook tongue in use. The design of the rubber joint 12 and the metal skeleton 13 allows the connecting plate 5 to swing slightly with the deformation of the hook tongue, avoiding stress concentration caused by rigid connection.

[0027] Specifically, mounting bases 14 are installed on both sides of one end of the mounting platform 11. A universal ball joint 15 is provided inside the mounting base 14 through a limiting ring. A guide plate 16 is installed at the top of the universal ball joint 15. In use, with the cooperation of the mounting base 14, the universal ball joint 15 and the limiting ring, the guide plate 16 can be allowed to rotate in the horizontal or vertical direction, guiding the airflow to the inlet of the heat dissipation hole, increasing the speed at which the air enters the heat dissipation hole 4, and enhancing the air guiding effect of the guide plate 16.

[0028] Specifically, two of the deflector plates 16 are provided at one end of the mounting platform 11. Both deflector plates 16 are arc-shaped. The arc-shaped deflector plates 16 utilize the Bernoulli effect to generate aerodynamic lift, causing the deflector plates 16 to automatically turn towards the wind direction under the action of wind force.

[0029] Example 2

[0030] This embodiment is an improvement upon embodiment 1. For details, please refer to [link / reference]. Figure 1-5 The heat-conducting block 6 has a fixing hole 9 inside, and each fixing hole 9 is provided with a heat dissipation fin 10. The fixing hole 9 inside the heat-conducting block 6 has a stepped design, with the upper part being larger than the lower part. There are multiple fixing holes 9 inside the heat-conducting block 6, and the multiple fixing holes 9 are distributed at equal intervals inside the heat-conducting block 6. The heat generated by the hook tongue is discharged through the heat-conducting block 6 and dissipated by the heat dissipation fin 10. The airflow passes through the fixing hole 9, and the venturi effect is used to accelerate the fluid, enhance the heat dissipation or cleaning effect, and improve the heat dissipation efficiency. The reduction in temperature of the hook tongue protrusion 3 can improve fatigue strength.

[0031] Working principle: When using this self-locking hook tongue, external air enters the interior of the heat dissipation hole 4 through the guide plate 16. With the cooperation of the mounting base 14, the universal ball joint 15 and the limiting ring, the guide plate 16 can rotate, which enhances the air guiding effect of the guide plate 16. After the air enters the interior of the heat dissipation hole 4, it rotates to form a vortex with the cooperation of the spiral guide groove 8. The spiral guide groove 8 guides the airflow to make spiral motion along the hole wall, which makes the heat dissipation effect better. The heat generated by the hook tongue is discharged through the heat conduction block 6 and dissipated by the heat dissipation fins 10. The airflow passes through the fixing hole 9 and accelerates the fluid by utilizing the Venturi effect, which enhances the heat dissipation or cleaning effect and improves the heat dissipation efficiency. The reduction in temperature of the hook tongue protrusion block 3 can improve fatigue strength.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-locking hook tongue for improving fatigue strength, comprising a hook tongue body (1), characterized in that: The hook tongue body (1) has a through hook tongue pin hole (2) inside, and a hook tongue protrusion block (3) is installed at one end of the hook tongue body (1). The hook tongue body (1) and the hook tongue protrusion block (3) are an integral structure. A heat dissipation hole (4) is opened through the inside of the hook tongue protrusion block (3). A ventilation mechanism is provided inside the heat dissipation hole (4). The ventilation mechanism includes a connecting plate (5), a heat-conducting block (6), a support column (7), a spiral guide groove (8), an installation platform (11), a rubber joint (12), and a metal frame (13). The connecting plate (5) is located at the top and bottom of the heat dissipation hole (4). Multiple heat-conducting blocks (6) are installed inside the heat dissipation hole (4). Support columns (7) are installed between the heat-conducting blocks (6). Installation platforms (11) are installed at both the top and bottom of the support columns (7). A rubber joint (12) is installed at the middle position of one end of the installation platform (11). A metal frame (13) is installed at one end of each rubber joint (12). One end of the metal frame (13) is connected to one end of the connecting plate (5). A spiral guide groove (8) is opened inside the heat dissipation hole (4).

2. The self-locking hook tongue for improving fatigue strength according to claim 1, characterized in that: Mounting bases (14) are installed on both sides of one end of the mounting platform (11). A universal ball joint (15) is provided inside the mounting base (14) through a limiting ring. A guide plate (16) is installed at the top of the universal ball joint (15).

3. The self-locking hook tongue for improving fatigue strength according to claim 2, characterized in that: Two of the guide plates (16) are provided at one end of the mounting platform (11), and both guide plates (16) are arc-shaped.

4. The self-locking hook tongue for improving fatigue strength according to claim 1, characterized in that: The heat-conducting block (6) has a fixing hole (9) inside, and heat dissipation fins (10) are provided inside the fixing hole (9).

5. A self-locking hook tongue for improving fatigue strength according to claim 4, characterized in that: The fixing hole (9) is designed in a stepped shape inside the heat-conducting block (6), and the fixing hole (9) is designed to be larger at the top and smaller at the bottom.

6. A self-locking hook tongue for improving fatigue strength according to claim 5, characterized in that: Multiple fixing holes (9) are provided inside the heat-conducting block (6), and the multiple fixing holes (9) are distributed at equal intervals inside the heat-conducting block (6).

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