A welding splint

Abstract

The invention discloses a weld splint, which includes a main body having a front surface, a back surface, a top surface and a bottom surface; the front surface includes a matching arc surface with a radius slightly smaller than that of a steel rail, a weld avoidance groove recessed inwardly along the Z axis is provided on the front surface, a reinforcing boss is provided at a position opposite to the weld avoidance groove on the back surface, the reinforcing boss protrudes from the back surface along the Z axis, the top surface has a wheel avoidance groove adjacent to the back surface, the wheel avoidance groove includes a horizontal groove surface and an inclined groove surface, the weld avoidance groove is formed at the junction of the reinforcing boss and the bottom surface, and extends toward the top surface along the X axis by a preset width value, and a notch is formed on the reinforcing boss. The invention can better disperse the stress at the junction of the edge of the avoidance groove and the side surface of the groove.

Description

Technical Field

[0001] The invention relates to the technical field of rail joint clamps, in particular to a welding seam clamp. Background Art

[0002] In order to meet the seamless requirements on railway lines, more and more rail welding joints are used to connect two rails by welding. However, affected by many factors such as welding technology and on-site process operation, the welded rail welding joints will have a certain degree of welding defects and damage problems during post-welding inspection and use for a period of time. When a problem is found in the rail, some remedial measures can be taken using the rail welding joint, such as cutting it off and re-welding it or using plywood reinforcement to ensure driving safety. Among them, re-welding requires sawing off at least 6 meters of rails at both ends of the weld, and then putting in a new rail for re-welding. This repair method has the advantages of long service life and high safety factor. However, re-welding also has the disadvantages of cumbersome operation, complex installation, and being greatly affected by external factors such as weather. Weld splints are usually used for temporary or short-term repairs. During reinforcement, the weld splints need to be reinforced on the welds or severely injured parts on both sides of the rails to prevent the weld injury from spreading. Summary of the invention

[0003] An object of the present invention is to provide a weld clamp to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides a weld splint, which includes a main body, the thickness direction of the main body is the Z axis, the width direction is the X axis, and the length direction is the Y axis; the main body has a front surface, a back surface, a top surface and a bottom surface, the front surface and the back surface are relatively arranged on the Z axis, the top surface and the bottom surface are relatively arranged on the X axis, the front surface includes a matching arc surface with a radius slightly smaller than the rail, the front surface is provided with a weld avoidance groove which is recessed inwardly along the Z axis, and a reinforcing boss is provided on the back surface at a position opposite to the weld avoidance groove, the reinforcing boss protrudes from the back surface along the Z axis and protrudes by a preset thickness value, the size of the reinforcing boss in the Y axis direction is a preset length value, and is larger than the weld avoidance groove. The size of the groove in the Y-axis direction, the top surface has a wheel avoidance groove adjacent to the back surface, the wheel avoidance groove includes a horizontal groove surface and an inclined groove surface, the top surface also includes an upper inclined surface adjacent to the front surface, the horizontal groove surface is closer to the bottom surface than the upper inclined surface, the weld avoidance groove passes through the upper inclined surface along the X-axis, one side of the reinforcing boss extends along one direction of the X-axis to be flush with the horizontal groove surface, and the other side extends along the other direction of the X-axis to the bottom surface, the weld avoidance groove passes through the reinforcing boss along the X-axis on the front side, and forms a preset width value extending along the X-axis toward the top surface at the junction of the reinforcing boss and the bottom surface, forming a notch on the reinforcing boss.

[0005] Furthermore, the upper inclined surface is connected to the upper portion of the matching curved surface through a transition curved surface, and the bottom surface is connected to the lower portion of the matching curved surface through a transition curved surface.

[0006] Furthermore, an insulating layer is provided on the upper inclined surface, the lower inclined surface, the matching arc surface and the transition arc surface.

[0007] Furthermore, the two ends of the weld avoidance groove respectively pass through the top surface and the bottom surface along the X-axis, the lowest point of the concave of the weld avoidance groove is a rectangular plane, the distance between the rectangular plane and the front side along the Z-axis is a preset value, and the edges on both sides of the rectangular surface gradually extend outward and inclined toward the front side along the direction between the Y-axis and the Z-axis to form two arc surfaces, and the radius of the arc surface is not less than the preset value, so that the concave surface of the weld avoidance groove composed of the rectangular plane and the arc surface can be used to disperse the stress concentration in the area adjacent to the weld avoidance groove.

[0008] Furthermore, the radius of the arc surface is not less than the preset value, and the two arc surfaces are symmetrically arranged along the X-axis and the Y-axis relative to the rectangular surface.

[0009] Furthermore, the preset value and the radius of the arc surface are both 22 mm.

[0010] Furthermore, the weld is forged to avoid the groove.

[0011] Furthermore, the preset thickness value is set within the range of 8 mm to 10 mm, and the preset length value is set within the range of 120 mm to 150 mm.

[0012] Furthermore, the weld clamp also includes a plurality of bolt holes extending in two directions along the Y-axis and spaced apart from each other, penetrating the front and back surfaces, and the preset length value of the reinforcing boss is such that its edge is disposed adjacent to the bolt holes.

[0013] The present invention adopts the above technical solution, which has the following advantages:

[0014] The avoidance groove of the present invention can better avoid the weld joint structure, and the inner concave surface shape of the avoidance groove can better disperse the stress at the junction of the edge of the avoidance groove and the side surface of the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 and Figure 2 A schematic diagram of the three-dimensional structure of a weld splint provided in an embodiment of the present invention;

[0016] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the weld splint from the back side perspective;

[0017] Figure 4 for Figure 1 The front view of the weld splint from the back side;

[0018] Figure 5 for Figure 1 A top view of the welded joint plate in FIG.

[0019] Figure 6 for Figure 1 A side view of the welded joint plate in FIG.

[0020] Figure 7 for Figure 1 Schematic diagram of the use status of the weld splint;

[0021] Figure 8 for Figure 7 Schematic diagram of the weld splint after assembly;

[0022] Figures 9 to 11 for Figure 1 Schematic diagram of stress test distribution corresponding to three different arc surface radii of the weld splint.

[0023] Reference numerals:

[0024] 1 Welding splint 2 Rail 3 bolt 11 front 12 back 13 Top 14 Bottom 15 End face 16 Weld avoidance groove 17 Bolt Holes 18 Strengthening boss 21 Belly 22 Wing plate 111 Upper transition arc 131 Horizontal groove surface 132 upper slope 133 Inclined groove surface 161 Rectangular Face 162 Arc surface 181 Gap DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 5 As shown, the weld splint provided in this embodiment includes a long strip-shaped plate-shaped main body 1, the width direction of the main body 1 is the X-axis, the length direction is the Y-axis, and the thickness direction is the Z-axis. The Z-axis is perpendicular to the X-axis and the Y-axis in the figure at the same time, but is not shown in the figure.

[0027] The main body 1 has a front surface 11, a back surface 12, a top surface 13, a bottom surface 14 and an end surface 15. The front surface 11 and the back surface 12 are arranged opposite to each other on the Z axis, the top surface 13 and the bottom surface 14 are arranged opposite to each other on the X axis, and the two end surfaces 15 are arranged opposite to each other on the Y axis.

[0028] The front side 11 is configured to be a curved surface that can be attached to the outer side of the rail 2 in a face-to-face manner. The "outside" in this and other places in this article is relative to the overall structure of the entire object, that is, the direction from the geometric center of the object to the outside of the object is considered "outward". "Face-to-face attachment" can be understood as the surfaces of two objects being attached together.

[0029] In this embodiment, the front face 11 includes a matching arc surface 113. The arc surface (matching arc surface 113) of the front face 11 of the weld clamp 1 is designed to fit the rail, thereby facilitating installation and providing good support. The radius of the matching arc surface 113 is slightly smaller than the corresponding arc surface of the rail. For example, the radius of the corresponding arc surface of the rail is 400 mm; the radius of the matching arc surface is 398 mm, or 398.5 mm, or a value between 398.5 mm and 398 mm.

[0030] like Figure 6 The side view of the main body 1 is shown, from which the end face 15 of the main body 1 can be seen, and the shape of the front face 11 can also be seen. The front face 11 of the weld clamp 1 of the embodiment of the present invention is the face that matches the side face of the rail cavity of the rail; the back face 12 is the face opposite to the outer side face, and matches the outer side face with the nut on the bolt 3 to achieve clamping of the rail 2 from both sides. In the present invention, the thickness of the weld clamp refers to the distance between the front face 11 and the side face 12, that is, Figure 1 and Figure 2 The weld clamping plate 1 also has a top surface and a bottom surface. The top surface includes, for example, a wheel avoidance groove. The bottom surface includes, for example, a horizontal bottom 141.

[0031] A weld avoidance groove 16 is provided on the front side 11 and is recessed inwardly along the Z axis. The two ends of the weld avoidance groove 16 respectively penetrate the top surface 13 and the bottom surface 14 along the X axis to avoid the weld ribs of the damaged rails, making it convenient for the on-site installation of the weld splint in a complex railway environment.

[0032] However, computer software-assisted calculations show that after the weld clamp is installed on the rail 2, it will be subjected to stress, and the stress concentration area mainly includes Figure 1 The position marked by the middle circle is distributed at the junction of the edge of the weld avoidance groove 16 and the side of the groove (such as Figure 1 The positions of the four circles shown).

[0033] In order to reduce or disperse these concentrated stresses, the lowest point of the weld avoidance groove 16 is set as a rectangular plane 161, and the distance between the rectangular plane 161 and the front surface 11 along the Z axis is a preset value H (such as Figure 5 The preset value H is the depth of the weld avoidance groove 16. The edges on both sides of the rectangular surface 161 gradually extend outward and obliquely toward the front surface 11 along the direction between the Y axis and the Z axis to form two arc surfaces 162, and the two arc surfaces 162 are symmetrically arranged along the X axis and the Y axis relative to the rectangular surface 161.

[0034] Computer software-assisted calculations also show that the differences in radius, position, and implementation of the arc surface 162 of the weld avoidance groove 16 will lead to changes in the stress concentration area and strength of the weld splint.

[0035] In view of this, firstly, with respect to the radius of the arc surface 162, considering the dimensional rigidity requirements of the rail 2 and the weld clamp, the test verified that the depth H of the weld avoidance groove 16 was set to 22 mm, and the radius of the arc surface 162 was 10 mm, 15 mm, and 22 mm respectively, and the stress distribution diagram under the same load was an example. Figures 9 to 11 As shown in the figure Fig. 9 The radius of the corresponding arc surface 162 is 10 mm. Fig.10 The radius of the corresponding arc surface 162 is 15 mm. Fig.11 The radius of the corresponding arc surface 162 is 22 mm. Fig. 9 , Fig.10 and Fig.11 As you can see, Fig. 9 and Fig.10 There will still be a relatively concentrated stress area. It can be intuitively observed that this stress concentration area is always accompanied by the junction between the edge of the weld avoidance groove 16 and the side of the groove (the position with more arrows). Fig.11It can be clearly observed that the stress concentration area at the weld avoidance groove 16 disappears. Then, the radius of the arc surface 162 should fully cover the depth range of the groove. The larger the arc surface, the better the force dispersion effect, that is, the arc radius R is equal to the groove depth H or close to the groove depth. Therefore, the radius of the arc surface 162 in this embodiment is set to be not less than the preset value H, so that the concave surface of the weld avoidance groove 16 composed of the rectangular plane 161 and the arc surface 162 can be used to maximize the dispersion of stress concentration in the area adjacent to the weld avoidance groove 16. This embodiment greatly reduces the stress concentration from the rail 2 that the weld clamp 2 is subjected to during use by adding the arc surface 162 of the weld avoidance groove 16 for transition.

[0036] Secondly, with regard to the position of the arc surface 162 , it should be ensured that the arc surface 162 can envelop the entire weld avoidance groove 16 , so as to minimize stress concentration.

[0037] Furthermore, in the implementation of the arc surface 162, the weld avoidance groove 16 is forged without other machining, thereby obtaining a more complete metal streamline fiber surface and retaining the forging strength. At the same time, the concave arc surface of the weld avoidance groove 16 can reduce stress concentration.

[0038] In one embodiment, the connection between the front surface 11 and the top surface 13 is configured as a transition arc surface 111, and the connection between the front surface 11 and the bottom surface 14 is also configured as a transition arc surface 111. The transition arc surface is helpful to disperse the stress borne by the weld splint.

[0039] In one embodiment, the top surface 13 includes a wheel avoidance groove adjacent to the back surface 12, and the wheel avoidance groove includes a horizontal groove surface 131, an upper inclined surface 132, and an inclined groove surface 133 located between the horizontal groove surface 131 and the upper inclined surface 132, so as to avoid the shaft of the train. Generally, the plywood has such a design, in which the horizontal groove surface 131 is closer to the bottom surface 14 than the upper inclined surface 132, and the weld avoidance groove 16 passes through the upper inclined surface 132 along the X-axis.

[0040] In one embodiment, Figure 3 As shown, in order to solve the problem that the thickness of the weld splint becomes thinner due to the weld avoidance groove 16 and cannot meet the strength requirements, a reinforcing boss 18 is provided on the back 12 at a position opposite to the weld avoidance groove 16. The reinforcing boss 18 protrudes from the back 12 along the Z axis, and the dimension of the reinforcing boss 18 in the Y axis direction is a preset length value and is greater than the dimension of the weld avoidance groove 16 in the Y axis direction. This embodiment increases the product thickness at the weakest position of the weld splint, so that the product can be ensured to have sufficient strength.

[0041] like Figure 7 and Figure 8As shown, when the weld splint 1 is used, the weld splint 1 is symmetrically arranged on both sides of the rail 2 to form a weld splint joint. The rail 2 has a web portion 21 and a wing portion 22. The web portion 21 is provided with a plurality of bolt holes spaced apart along its length direction. Correspondingly, the weld splint 1 also includes a plurality of bolt holes 17 extending in two directions of the Y axis and spaced apart from each other, which penetrate the front face 11 and the back face 12. The weld splint 1 can be fixedly connected to the rail 2 by using bolts 3 and gaskets through the bolt holes 17 and the bolt holes on the web portion 21. The preset length value of the reinforcing boss 18 is that its edge is arranged adjacent to the bolt hole 17. Therefore, the length of the reinforcing boss 18 in two directions of the Y axis is greater than the weld avoidance groove 16, and is greater than the preset length value. The preset length value is required to ensure that the bolts 3 and nuts on both sides have sufficient installation and wrench space, and also completely cover the length of the weld avoidance groove 16 in the Y axis direction, such as 70 mm. Therefore, the preset length values ​​of the reinforcing boss 18 along the two directions of the Y axis are set within the range of 120 mm to 150 mm, for example, preferably about 135 mm.

[0042] After the weld clamp 1 is installed on the rail 2, it is also necessary to install a gauge baffle (not shown in the figure) on the outside of the weld clamp 1. In order to ensure the installation reliability of the gauge baffle, the wing plate portion 22 at the bottom of the rail 2 that provides an upward support force for the bottom surface 14 of the weld clamp 1 also needs to provide an upward support force for the gauge baffle. Therefore, the wing plate portion 22 at the bottom of the rail 2 protrudes outward along the Z axis from the outer edge of the reinforcing boss 18 and the gauge baffle after the weld clamp 1 and the gauge baffle are simultaneously installed on the rail 2, so that the normal installation of the gauge baffle can be ensured. Therefore, it is appropriate to set the projection preset thickness value of the reinforcing boss 18 within the range of 8mm to 10mm.

[0043] For example: after the weld clamp 1 is installed on the rail 2, the outer edge of the flange 22 of the rail 2 is a 6-gauge baffle, and there is a 6mm installation position between the bottom outer edge A of the reinforcing boss 18 and the outer edge of the flange 22 of the rail 2. Similarly, the outer edge of the flange 22 of the rail 2 is a 10-gauge baffle, and there is a 15mm installation position between the outer edge B of the portion outside the reinforcing boss 18 on the back 12 and the outer edge of the flange 22 of the rail 2. When the thickness of the weld clamp 1 along the Z axis except the reinforcing boss 18 is 50mm, the outer edge of the flange 22 of the rail 2 is a 10-gauge baffle, and there is a 15.5mm installation position between the outer edge B of the portion outside the reinforcing boss 18 on the back 12 and the outer edge of the flange 22 of the rail 2.

[0044] In one embodiment, the upper inclined surface 132 is connected to the upper part of the matching curved surface 113 through a transition curved surface (upper transition curved surface 111), and the bottom surface 14 includes, for example, a horizontal bottom 141, and the horizontal bottom 141 is connected to the lower part of the matching curved surface 113 through a transition curved surface (lower transition curved surface 112). Due to the inclined shapes of the upper inclined surface 132 and the lower inclined surface 142, the upper inclined surface 132 can also be regarded as a part of the front surface 11, and the lower inclined surface 142 can also be regarded as a part of the bottom surface 14. Of course, multiple sections of transition curved surfaces can be respectively provided between the matching curved surface 113 and the upper inclined surface 132, and between the matching curved surface 113 and the lower inclined surface 142. Advantageously, the transition curved surface is provided according to the size of the corresponding part of the rail, and generally maintains the same or substantially the same gap as the matching curved surface.

[0045] In the prior art, the matching arc surface, upper inclined surface, and lower inclined surface of the front side of the weld clamp 1 are designed to fit the rail exactly or to have a uniform gap with the rail. The exactly fitting or uniform gap is conducive to making the adhesive layer between the weld clamp and the rail more uniform, so that the adhesive layer can have better overall consistency.

[0046] However, the inventors of the present invention have found that, in fact, due to the existence of processing errors and installation errors, there will be a situation where the matching arc surface, the upper inclined surface, and the lower inclined surface do not contact the rail at any random point. When the upper inclined surface and the lower inclined surface do not contact the rail, the pressure of the rail cannot be effectively shared by the weld splint, and the reinforcement performance of the weld splint will be greatly reduced. Therefore, it is necessary to overcome the technical prejudice of setting a uniform gap or a uniform thickness adhesive layer in the prior art.

[0047] The embodiments of the present invention are intended to avoid this situation by designing the product's own structure. The embodiments of the present invention provide a weld splint, a weld splint processing method or a rail joint structure to allow processing errors to a certain extent, so as to achieve a good fit between the weld splint and the rail. In one embodiment, an insulating layer 4 is provided on the upper inclined surface 132, the lower inclined surface 142 and the matching arc surface 113; in the case of the aforementioned transition arc surface, an insulating layer 4 is also provided on the transition arc surface. The insulating layer 4 can be made of any suitable material and molding method. The thickness of the insulating layer 4 can be set as needed. For example, the thickness of the insulating layer is set in the range of 0.5mm-3mm; or in the range of 0.8mm-2.0mm.

[0048] In order to ensure that the upper inclined surface 132 and the lower inclined surface 142 support the rail, the thickness of the first insulating layer at the matching arc surface 113 is greater than the thickness of the second insulating layer at the upper inclined surface 132 and the lower inclined surface 142. Because the elasticity (compression deformation capability) of the insulating layer is better than the elasticity of the weld clamp, when the weld clamp is fixed to the rail, it can ensure that the upper inclined surface 132 and the lower inclined surface 142 press the rail tightly and provide good support for the rail. The weld clamp is made of steel.

[0049] Specifically, the difference between the thickness of the first insulating layer and the thickness of the second insulating layer is greater than or equal to 0.3 mm and less than or equal to 1.0 mm. More specifically, the difference in thickness is, for example, set within the range of 0.5 mm-0.8 mm.

[0050] The thickness of the first insulating layer and the thickness of the second insulating layer can be set according to specific circumstances. In one embodiment, the thickness of the first insulating layer at the matching arc surface 113 is set in the range of 1.3mm-1.6mm; the thickness of the second insulating layer at the upper inclined surface 132 and the lower inclined surface 142 is set in the range of 0.8mm-1.2mm. The method of forming the different insulating layer thicknesses can adopt any appropriate method in the prior art.

[0051] The design of the present invention can also be used for a series of products in the same field such as adhesively bonded insulating splints and fish plates for reinforcing and connecting both sides of the rail waist.

[0052] The embodiment of the present invention provides a more reasonable product type - the arc surface avoids air and the inclined surface is raised to ensure that the upper and lower inclined surfaces can contact the rails and play a supporting role. The above structure is used to ensure that the pressure of the rails is shared, eliminating the uncertainty in the processing of existing products, and the product reinforcement performance is more stable.

[0053] There are two key points in the above embodiment. One is that the upper and lower inclined surfaces are slightly higher than the theoretical position to ensure that the two points can completely contact the rail; or, the other is that the matching arc is required to be smaller than the theoretical position (i.e. thinner or indented in the thickness direction, for example, indented by 0.5mm-1.5mm).

[0054] The specific implementation method can realize this design scheme by welding pads on the upper and lower inclined surfaces based on the original process, or by grinding the arc surface deeper, etc. The key point is that the upper and lower inclined surfaces are processed higher than the theoretical value, or the front convexity is the theoretical value, while the arc surface is lower than the theoretical value. As a result, there is a very small gap between the waist of the rail and the metal arc surface of the splint after installation; or after applying the insulating layer, the thickness of the insulating layer at the matching arc surface is slightly larger than the thickness of the insulating layer at the upper and lower inclined surfaces.

[0055] That is to say, in an optional embodiment of the present invention, relative to the standard design scheme in which the front face of the weld splint and the side face of the rail cavity are evenly spaced, the upper bevel 132 and the lower bevel 142 are raised by 0.5mm-1.5mm. In another optional embodiment of the present invention, relative to the standard design scheme in which the front face of the weld splint and the side face of the rail cavity are evenly spaced, the upper bevel 132 and the lower bevel 142 are moved forward by 0.5mm-1.5mm with respect to the matching arc surface 113; or the matching arc surface 113 is moved backward by 0.5mm-1.5mm with respect to the upper bevel 132 and the lower bevel 142. The equal-spaced matching of the present invention includes a zero-spaced matching mode. The standard design scheme refers to an ideal design scheme in which the front face of the weld splint and the side face of the rail cavity fit perfectly or have a constant spacing.

[0056] In one embodiment, one side of the reinforcing boss 18 extends along one direction of the X-axis to be flush with the horizontal groove surface 131, and the other side extends along the other direction of the X-axis to be flush with the bottom surface 14. The weld avoidance groove 16 penetrates the reinforcing boss 18 along the X-axis on the front side 11, and is formed at the junction of the reinforcing boss 18 and the bottom surface 14, extending along the X-axis toward the top surface 13 with a preset width value, and a notch 181 is formed on the reinforcing boss 18, so that the arc surface 162 of the weld avoidance groove 16 surrounds the entire weld avoidance groove 16, fully covering the junction between the groove side and the groove bottom, thereby maximally dispersing the stress distribution.

[0057] The more complex the shape and structure, the more difficult it is to manufacture, and accordingly, the manufacturing cost will also increase significantly. Such complex curved surfaces can be processed through specific mechanical processing such as machining centers, but there is a disadvantage of low processing efficiency. At the same time, because this groove only needs to avoid the weld ribs and does not require very high precision, it is not cost-effective to obtain such a curved surface through mechanical processing. Therefore, choosing to forge the shape through a forging die in one step not only improves production efficiency, but also greatly reduces production costs. In addition, a good forging process can enhance the overall strength of the groove part - the arc of the product obtained in this way has very good initial strength - without the need for secondary processing.

[0058] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some of the technical features thereof may be replaced by equivalents; these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A weld splint, characterized in that: The invention comprises a main body (1), wherein the thickness direction of the main body (1) is the Z axis, the width direction is the X axis, and the length direction is the Y axis; the main body (1) comprises a front surface (11), a back surface (12), a top surface (13), and a bottom surface (14); the front surface (11) and the back surface (12) are arranged opposite to each other on the Z axis, the top surface (13) and the bottom surface (14) are arranged opposite to each other on the X axis, the front surface (11) comprises a matching arc surface (113) whose radius is slightly smaller than that of the rail (2); a weld avoidance groove (16) which is recessed inwardly along the Z axis is provided on the front surface (11); a reinforcing boss (18) is provided on the back surface (12) at a position opposite to the weld avoidance groove (16); the reinforcing boss (18) protrudes from the back surface (12) along the Z axis and protrudes by a preset thickness value; the dimension of the reinforcing boss (18) in the Y axis direction is a preset length value and is larger than the dimension of the weld avoidance groove (16) in the Y axis direction; The front surface (13) has a wheel avoidance groove adjacent to the back surface (12), the wheel avoidance groove includes a horizontal groove surface (131) and an inclined groove surface (133), the top surface (13) also includes an upper inclined surface (132) adjacent to the front surface (11), the horizontal groove surface (131) is closer to the bottom surface (14) than the upper inclined surface (132), the weld avoidance groove (16) passes through the upper inclined surface (132) along the X-axis, and one side of the reinforcing boss (18) The weld avoidance groove (16) extends along one direction of the X-axis to be flush with the horizontal groove surface (131), and the other side extends along another direction of the X-axis to the bottom surface (14); the weld avoidance groove (16) penetrates the reinforcing boss (18) along the X-axis on the front side (11), and forms a notch (181) extending along the X-axis toward the top surface (13) at the junction of the reinforcing boss (18) and the bottom surface (14). The two ends of the weld avoidance groove (16) respectively penetrate the top surface (13) and the bottom surface (14) along the X-axis; the lowest point of the inner concave of the weld avoidance groove (16) is a rectangular plane (161); the distance between the rectangular plane (161) and the front surface (11) along the Z-axis is a preset value (H); both side edges of the rectangular plane (161) gradually extend outwards and obliquely toward the front surface (11) along the direction between the Y-axis and the Z-axis to form two arc surfaces (162); the radius of the arc surface (162) is not less than the preset value (H), so that the inner concave surface of the weld avoidance groove (16) composed of the rectangular plane (161) and the arc surface (162) can be used to disperse the stress concentration of the part adjacent to the weld avoidance groove (16); The weld avoidance groove (16) is forged.

2. The weld splint according to claim 1, characterized in that: The upper inclined surface (132) is connected to the upper part of the matching curved surface (113) through a transition curved surface, and the bottom surface is connected to the lower part of the matching curved surface (113) through a transition curved surface.

3. The weld splint according to claim 2, characterized in that: An insulating layer (4) is provided on the upper inclined surface (132), the lower inclined surface (142), the matching arc surface (113) and the transition arc surface.

4. The weld splint according to claim 3, characterized in that: The two arc surfaces (162) are arranged symmetrically along the X-axis and the Y-axis relative to the rectangular plane (161).

5. The weld splint according to claim 4, characterized in that: The preset value (H) and the radius of the arc surface (162) are both 22 mm.

6. The weld splint according to claim 3, characterized in that: The preset thickness value is set within the range of 8 mm to 10 mm, and the preset length value is set within the range of 120 mm to 150 mm.

7. The weld splint according to claim 4, characterized in that: It also includes a plurality of bolt holes (19) that extend in two directions along the Y axis and are spaced apart and penetrate the front surface (11) and the back surface (12); the preset length value of the reinforcing boss (18) is such that its edge is disposed adjacent to the bolt holes (19).

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