A forged knuckle with a profiled weight-reducing groove

Abstract

The application discloses a forged coupler knuckle with a special-shaped weight-reducing groove, which comprises a main body, the inner side of the main body is provided with an S-shaped connecting surface, the inner side of the main body is respectively provided with a mounting pin hole and a hoisting hole, the axes of the mounting pin hole and the hoisting hole are parallel and consistent, the side wall of the main body is respectively provided with two groups of first thickening portions and second thickening portions, the bottom of the main body is provided with two groups of weight-reducing grooves, and the inner side of the weight-reducing groove is provided with a special-shaped inclined surface groove. The transition structure of the two groups of concave inclined surfaces changes the weight-reducing system of the existing straight groove through type structure, the direction angle of the weight-reducing groove and the transition of the inner side inclined surface are improved, the special-shaped weight-reducing groove body is used to prolong the fatigue property and service life of the weight-reducing structure, the novel weight-reducing groove not only improves the weight-reducing effect of the forged coupler knuckle, but also greatly improves the fatigue life of the forged coupler knuckle.

Description

Technical Field

[0001] This invention relates to the field of coupler technology, specifically to a forged coupler tongue with an irregularly shaped weight-reducing groove. Background Technology

[0002] The railway freight car coupler is subjected to traction load and compressive load during operation. The existing forged coupler weight reduction groove is a straight through groove type, which reduces the weight of the forged coupler and also makes the forged coupler have better hardenability during quenching.

[0003] The existing straight-slot through-type weight reduction groove bears a large pressure during actual operation of the hook tongue. Under the continuous pressure, the weight reduction effect produced by the hook tongue weight reduction groove is slightly insufficient, which has a significant impact on the fatigue durability of the forged hook tongue. It usually results in a short service life and frequent replacement, leading to increased costs. Summary of the Invention

[0004] The purpose of this invention is to provide a forged hook tongue with an irregularly shaped weight-reducing groove to solve the related problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a forged hook tongue with an irregularly shaped weight-reducing groove, comprising a main body, wherein the inner side of the main body is provided with an S-shaped connecting surface, and the interior of the main body is provided with mounting pin holes and lifting holes, wherein the axes of the mounting pin holes and lifting holes are parallel and consistent, wherein the sidewalls of the main body are respectively provided with two sets of first thickened parts and second thickened parts, and the bottom of the main body is provided with two sets of weight-reducing grooves, wherein the inner side of the weight-reducing grooves is provided with irregularly shaped inclined grooves.

[0006] Preferably, the top of the first thickened portion of both sets is provided with an arc portion, and the arc portion is concentric with the first connecting hole.

[0007] Preferably, the thickness of the two sets of second thickened portions is at least 4 mm, the thickness of the two sets of first thickened portions is at least 5 mm, and the two sets of second thickened portions and first thickened portions are integrally connected to the side wall of the main body.

[0008] Preferably, the two sets of irregularly shaped inclined grooves are arranged on the inner side of the weight reduction groove in a slope transition structure.

[0009] Preferably, the bottom of the main body is integrally connected with reinforcing ribs, and the two sets of weight-reducing grooves are symmetrically arranged at the bottom of the main body in the same extending direction.

[0010] Preferably, the S-shaped connecting surface is a forging, and the inner side of the S-shaped connecting surface is provided with an arc-shaped traction surface.

[0011] Preferably, a wear-resistant layer is provided on the inner side of the arc-shaped portion at the top of the two sets of first thickened portions.

[0012] Preferably, the concave surfaces of the two sets of weight-reducing grooves are irregularly shaped, and the inner sides of the two sets of irregularly shaped structures are sloping and symmetrically arranged in the same extending direction.

[0013] Compared with the prior art, the present invention provides a forged hook tongue with an irregularly shaped weight-reducing groove, which has the following beneficial effects:

[0014] This invention modifies the existing straight groove through-type weight reduction system by using a transition structure with two sets of concave slopes. This improves the direction angle of the weight reduction groove and the transition of the inner slope, thereby reducing the wear of the two sets of grooves and extending the fatigue resistance and service life of the weight reduction structure. This new type of weight reduction groove not only improves the weight reduction effect of the forging hook tongue, but also greatly improves the fatigue life of the forging hook tongue. Attached Figure Description

[0015] Figure 1 This is a first perspective view of the present invention;

[0016] Figure 2 This is a second perspective view of the present invention;

[0017] Figure 3 This is a third perspective view of the present invention;

[0018] Figure 4 This is a comparison diagram of the old and new weight reduction grooves of the present invention.

[0019] In the figure: 1. Main body; 2. Mounting pin hole; 3. First thickened part; 4. Second thickened part; 5. Lifting hole; 6. S-shaped connecting surface; 7. Weight reduction groove; 8. Irregular sloping groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-4 The present invention provides a technical solution: a forged hook tongue with an irregular weight-reducing groove, comprising a main body 1, an S-shaped connecting surface 6 on the inner side of the main body 1, mounting pin holes 2 and lifting holes 5 respectively opened inside the main body 1, and the axes of the mounting pin holes 2 and the lifting holes 5 are parallel and consistent, two sets of first thickened parts 3 and second thickened parts 4 are respectively installed on the side wall of the main body 1, and two sets of weight-reducing grooves 7 are opened at the bottom of the main body 1, and an irregular inclined groove 8 is opened on the inner side of the weight-reducing groove 7.

[0022] As a preferred embodiment, the top of the two sets of first thickened portions 3 are provided with arc-shaped portions, and the arc-shaped portions are concentric with the first connecting holes 2. While thickening the structure, it provides a connection calibration position at the position of the S-shaped connecting surface 6 so as to install the hook tongue.

[0023] As a preferred embodiment, the thickness of the two sets of second thickened parts 4 is at least 4 mm, the thickness of the two sets of first thickened parts 3 is at least 5 mm, and the two sets of second thickened parts 4 and first thickened parts 3 are integrally connected to the side wall of the main body 1. By using the specified thickness of the thickened structure, the outer wall of the main body 1 is protected against wear, ensuring the qualified indicators of the actual operation of the hook tongue and improving the safety of use.

[0024] As a preferred embodiment, two sets of irregularly shaped inclined grooves 8 are arranged on the inner side of the weight reduction groove 7 with a slope transition structure. The shape of the groove is changed from the existing straight groove through-type structure, and the inner slope is extended at an inclination. In this way, the wear resistance of the hook tongue weight reduction groove is improved by utilizing the irregular structure.

[0025] As a preferred embodiment, the bottom of the main body 1 is integrally connected with reinforcing ribs, and two sets of weight-reducing grooves 7 are symmetrically arranged at the bottom of the main body 1 in the same extending direction, which increases the firmness of the bottom structure of the main body 1 and, in conjunction with the use of the weight-reducing grooves, increases the stability of the hook tongue traction state.

[0026] As a preferred embodiment, the S-shaped connecting surface 6 is a forging. The inner side of the S-shaped connecting surface 6 is provided with an arc-shaped traction surface. By using the forging process, the material cost of the hook tongue is reduced, thus avoiding manufacturing defects such as sand holes, shrinkage cavities, and shrinkage porosity caused by the casting process. This reduces potential fatigue crack sources. Furthermore, since the fatigue limit of the forging is higher than that of the casting, the fatigue life of the hook tongue is also improved.

[0027] As a preferred embodiment, the inner side of the arc-shaped portion at the top of the two sets of first thickened portions 3 is provided with a wear-resistant layer to further enhance the wear resistance of the thickened structure.

[0028] As a preferred embodiment, the concave surfaces of the two sets of weight-reducing grooves 7 are irregularly shaped, and the inner sides of the two sets of irregularly shaped structures are sloped and symmetrically arranged in the same extending direction, which improves the weight-reducing effect of the forging hook tongue and extends the fatigue life of the forging hook tongue.

[0029] Example 1, as Figure 1 , 2 As shown in Figure 3, the concave surfaces of the two sets of weight-reducing grooves 7 are irregularly shaped, and the inner sides of the two sets of irregularly shaped structures are sloping and symmetrically arranged in the same extending direction. Through the weight-reducing grooves with irregularly shaped structures, the hook tongue structure used in actual use can be safely buffered, thereby meeting the high-intensity working requirements and enhancing the weight-reducing effect of the weight-reducing grooves.

[0030] Example 2, as Figure 4 As shown, compared with the existing straight through-type weight reduction groove, the new weight reduction groove increases the weight reduction effect by 10%. Through finite element analysis and fatigue test, the fatigue life of the hook tongue of the new weight reduction groove is increased by 25% compared with the original, which greatly extends the service life of the hook tongue and eliminates the defects and inconveniences of insufficient weight reduction and frequent replacement of the existing hook tongue. The new weight reduction groove has a better ability to resist deformation stress than the old weight reduction groove.

[0031] Note: This invention mainly focuses on the innovative protection of the weight reduction method for forged couplers. Under the same load spectrum, fatigue tests were conducted on two types of forged couplers with weight reduction grooves, both new and old, on a fatigue testing machine. The test standard adopted the load spectrum for fatigue tests of couplers of trains with a weight of 20,000t and below, as specified in Article 6.2.2 of Q / CRRC J 162-2023 "Specification for Fatigue Testing and Evaluation of Couplers and Tongues of Railway Freight Cars". The test equipment was a comprehensive performance fatigue test bench for couplers. The test object was a forged coupler.

[0032] Test data: Old weight reduction tank: 95.2, 98.5, 96.3, 97.6 (ten thousand cycles);

[0033] New weight reduction tanks: 123.7, 135.4, 122.6, 127.3 (ten thousand times).

[0034] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A forged hook tongue with an irregularly shaped weight-reducing groove, comprising a main body (1), characterized in that: The inner side of the main body (1) is provided with an S-shaped connecting surface (6). The interior of the main body (1) is provided with mounting pin holes (2) and lifting holes (5), and the axes of the mounting pin holes (2) and lifting holes (5) are parallel and consistent. The side walls of the main body (1) are provided with two sets of first thickened parts (3) and second thickened parts (4). The bottom of the main body (1) is provided with two sets of weight-reducing grooves (7), and the inner side of the weight-reducing grooves (7) is provided with irregular inclined grooves (8).

2. A forged hook tongue with an irregularly shaped weight-reducing groove according to claim 1, characterized in that: The top of the first thickened part (3) of both sets is provided with an arc part, and the arc part is concentric with the mounting pin hole (2).

3. A forged hook tongue with an irregularly shaped weight-reducing groove according to claim 1, characterized in that: The thickness of the two sets of second thickened portions (4) is at least 4 mm, the thickness of the two sets of first thickened portions (3) is at least 5 mm, and the two sets of second thickened portions (4) and first thickened portions (3) are integrally connected to the side wall of the main body (1).

4. A forged hook tongue with an irregularly shaped weight-reducing groove according to claim 1, characterized in that: The two sets of irregular inclined grooves (8) are arranged in a slope transition structure on the inner side of the weight reduction groove (7).

5. A forged hook tongue with an irregularly shaped weight-reducing groove according to claim 1, characterized in that: The bottom of the main body (1) is integrally connected with reinforcing ribs, and the two sets of weight-reducing grooves (7) are symmetrically arranged at the bottom of the main body (1) in the same extending direction.

6. A forged hook tongue with an irregularly shaped weight-reducing groove according to claim 1, characterized in that: The S-shaped connecting surface (6) is a forging, and the inner side of the S-shaped connecting surface (6) is provided with an arc-shaped traction surface.

7. A forged hook tongue with an irregularly shaped weight-reducing groove according to claim 2, characterized in that: The inner side of the arc-shaped portion at the top of the first thickened portion (3) of both groups is provided with a wear-resistant layer.

8. A forged hook tongue with an irregularly shaped weight-reducing groove according to claim 1, characterized in that: The concave surfaces of the two sets of weight-reducing grooves (7) are irregularly shaped, and the inner sides of the two sets of irregularly shaped structures are sloped and symmetrically arranged in the same extending direction.

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