Welding pin grinding device

Abstract

The utility model discloses a welding pin grinding device which comprises a positioning base and a grinding handle, the bottom face of the positioning base is a plane, the positioning base is connected to tiled abrasive paper in a pressed mode through the bottom face, a vertically-through sliding space is arranged in the middle of the positioning base, and the grinding handle comprises a handle body and an installation portion connected to the handle body. The handle body is provided with a vertically-through welding pin mounting hole, the handle body is arranged in the sliding space so that the welding pin can make contact with the abrasive paper located on the lower side of the sliding space, the mounting part is slidably arranged on the positioning base, the positioning base limits the mounting part to slide on the first plane, the first plane is parallel to the bottom face, and when the mounting part slides on the positioning base, the welding pin can be welded to the abrasive paper. And the welding pin is vertical to the bottom surface. The utility model is favorable for improving the flatness of the bottom surface of the welding needle after grinding, avoiding the situation that the bottom surface of the welding needle is not vertical to the welding needle, and avoiding the safety risk caused by the situation.

Description

Technical Field

[0001] The utility model relates to the field of welding pin processing, in particular to a welding pin grinding device. Background Art

[0002] At present, cylindrical power batteries such as lithium-ion and sodium-ion have gradually become mainstream products in the new energy industry due to their high energy density, good capacity consistency, and ability to support high-rate charge and discharge. More and more manufacturers continue to pursue high stability and high production capacity of cylindrical power batteries. However, there are still the following common problems:

[0003] In order to increase the production capacity of cylindrical power batteries, a resistance welding structure of the shell bottom (and the current collector) is generally preferred, and this resistance welding structure often prefers a flat-head structure welding pin to increase the welding area. However, in the production of flat-head welding pins, when problems such as explosion points and sticking needles occur, the welding surface at the bottom of the welding pin is easily damaged, resulting in a small welding area. When the vehicle is loaded and vibrated, the internal winding core is easily bounced and directly impacts the welding position, bringing the risk of open circuit failure of the battery.

[0004] Therefore, cylindrical power batteries have high requirements on the flatness of the bottom plane of the flat-head welding pin, the verticality of the welding pin, and other precision requirements. When grinding the welding pin by hand, it is easy for the bottom of the welding pin to be uneven or the bottom plane of the welding pin to be not perpendicular to the welding pin, resulting in a small welding area of ​​the welding pin, and the risk of open circuit failure of the cylindrical power battery cannot be avoided. Utility Model Content

[0005] The utility model aims to provide a welding needle grinding device, which is beneficial to improving the flatness of the bottom surface of the welding needle after grinding, avoiding the situation that the bottom surface of the welding needle is not perpendicular to the welding needle, and is beneficial to avoiding the safety risks caused by this.

[0006] In order to achieve the above object, the utility model provides a welding needle grinding device, comprising:

[0007] A positioning base, the bottom surface of which is a plane, the positioning base is pressed onto the flat sandpaper through the bottom surface, and a sliding space penetrating from top to bottom is provided in the middle of the positioning base;

[0008] A grinding handle, the grinding handle includes a handle body and a mounting portion connected to the handle body, the handle body is provided with a welding pin mounting hole which passes through the handle body from top to bottom, the handle body is arranged in the sliding space so that the welding pin contacts the sandpaper located at the lower side of the sliding space, the mounting portion is slidably arranged on the positioning base, the positioning base limits the mounting portion from sliding on a first plane, the first plane is parallel to the bottom surface, and when the mounting portion slides on the positioning base, the welding pin remains perpendicular to the bottom surface.

[0009] Optionally, the mounting portion is connected at a position close to the bottom of the handle body.

[0010] Optionally, two opposite sides of the handle body extend outward to form the two mounting portions.

[0011] Optionally, the positioning base includes a base and a positioning cover fixedly mounted on the base, the bottom surface of the positioning base is formed on the base, the sliding space is formed on the base and the positioning cover, and the mounting portion is slidably disposed between the base and the positioning cover.

[0012] Optionally, the base is provided with first slide rails protruding upwards on both sides of the sliding space, and the grinding handle is mounted on the first slide rails through the mounting portion.

[0013] Optionally, the positioning cover plate is provided with second slide rails protruding downwards on both sides of the sliding space, and the mounting portion is slidably disposed on the second slide rails.

[0014] Optionally, the grinding handle includes a first handle part and a second handle part arranged opposite to each other, the inner side surface of the first handle part forms a first groove running through the upper and lower parts, and the inner side surface of the second handle part forms a second groove running through the upper and lower parts, and when the first handle part and the second handle part are combined, the first groove and the second groove jointly form the welding pin mounting hole.

[0015] Optionally, the first groove is an arc groove adapted to the welding needle, and the second groove is a V-shaped groove, and two side walls of the V-shaped groove are used to abut against the welding needle.

[0016] Optionally, the mounting portion is formed on the first handle portion, and the top of the second handle portion protrudes toward one side of the first handle portion to form a limiting portion, and the limiting portion is arranged on the top surface of the first handle portion.

[0017] In the utility model, the sandpaper is positioned by pressing the bottom surface of the positioning base, and the positioning base limits the mounting portion to slide on the first plane parallel to the bottom surface, so that the welding pin installed on the handle body can be driven to grind on the sandpaper and can remain perpendicular to the sandpaper, which is conducive to improving the flatness of the bottom surface of the welding pin after grinding, effectively reducing the situation where the bottom surface of the welding pin is not perpendicular to the welding pin, and thus can effectively avoid the risk of open circuit failure of the power battery caused by this, and is also conducive to improving the grinding efficiency of the welding pin. At the same time, because the utility model directly uses the bottom surface of the positioning base to press the flat sandpaper, it is easy to quickly replace the sandpaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the welding needle grinding device according to an embodiment of the utility model.

[0019] Figure 2It is a front view of the welding needle grinding device according to an embodiment of the utility model.

[0020] Figure 3 It is a schematic diagram of the exploded structure of the welding needle grinding device according to an embodiment of the utility model.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the grinding handle according to the embodiment of the utility model.

[0022] Figure 5 This is a schematic diagram of the exploded structure of the grinding handle according to an embodiment of the utility model.

[0023] Figure 6 It is a top view and a partially enlarged view of the welding needle grinding device according to an embodiment of the utility model.

[0024] Figure 7 It is a front view of the first handle portion of the embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to explain the technical content, structural features and effects achieved by the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0027] See also Figures 1 to 7 The utility model discloses a welding needle grinding device, including a positioning base 1 and a grinding handle 2. The bottom surface of the positioning base 1 is a plane. The positioning base 1 is pressed on the flat sandpaper 3 through the bottom surface. A sliding space 11 is provided in the middle of the positioning base 1 and runs through from top to bottom. The grinding handle 2 includes a handle body 21 and a mounting portion 22 connected to the handle body 21. The handle body 21 is provided with a welding needle mounting hole 23 running through from top to bottom. The handle body 21 is arranged in the sliding space 11 so that the welding needle 4 contacts the sandpaper 3 located at the lower side of the sliding space 11. The mounting portion 22 is slidably arranged on the positioning base 1. The positioning base 1 limits the mounting portion 22 from sliding on a first plane. The first plane is parallel to the bottom surface. When the mounting portion 22 slides on the positioning base 1, the welding needle 4 remains perpendicular to the bottom surface.

[0028] In the present invention, the sandpaper 3 is positioned by pressing the bottom surface of the positioning base 1, and the positioning base 1 limits the mounting portion 22 to slide on the first plane parallel to the bottom surface, so that the welding pin 4 installed on the handle body 21 can be driven to grind on the sandpaper 3 and can remain perpendicular to the sandpaper 3, which is conducive to improving the flatness of the bottom surface of the welding pin 4 after grinding, and effectively reduces the situation where the bottom surface of the welding pin 4 is not perpendicular to the welding pin 4, thereby effectively avoiding the risk of open circuit failure of the power battery caused by this, and is also conducive to improving the grinding efficiency of the welding pin 4. At the same time, because the present invention directly uses the bottom surface of the positioning base 1 to press the flat sandpaper 3, it is easy to quickly replace the sandpaper 3.

[0029] See also Figures 1 to 5 In some embodiments, the mounting portion 22 is connected near the bottom of the handle body 21 .

[0030] Specifically, two opposite sides of the handle body 21 extend outwards to form two mounting portions 22. Of course, the present invention does not limit the specific form of the mounting portion 22.

[0031] See also Figure 1 and Figure 3 In some embodiments, the positioning base 1 includes a base 12 and a positioning cover plate 13 fixedly mounted on the base 12, the bottom surface of the positioning base 1 is formed on the base 12, the sliding space 11 is formed between the base 12 and the positioning cover plate 13, and the mounting portion 22 is slidably disposed between the base 12 and the positioning cover plate 13. By mounting the mounting portion 22 between the positioning cover plate 13 and the base 12, the grinding handle 2 can be limited to limit the movement of the grinding handle 2 in the vertical direction, which is conducive to keeping the welding needle 4 perpendicular to the grinding plane during grinding.

[0032] See also Figure 6 Specifically, the positioning cover plate 13 is fixed to the base 12 by screws 16. Of course, the present invention does not limit the fixing method of the positioning cover plate 13 and the base 12.

[0033] See also Figure 3 Specifically, the base 12 is provided with first slide rails 14 protruding upwards on both sides of the sliding space 11 , and the grinding handle 2 is mounted on the first slide rails 14 through the mounting portion 22 .

[0034] Specifically, the positioning cover plate 13 is provided with second slide rails 15 protruding downwards on both sides of the sliding space 11 , respectively, and the mounting portion 22 is slidably disposed on the second slide rails 15 .

[0035] Since the mounting portion 22 is slidably disposed between the first slide rail 14 and the second slide rail 15 , it is not only convenient for the mounting portion 22 to slide, but also can ensure that the mounting portion 22 slides on the first plane, which is beneficial to improving the grinding efficiency.

[0036] See also Figure 4 and Figure 5 In some embodiments, the grinding handle 2 includes a first handle portion 24 and a second handle portion 25 arranged opposite to each other, the inner side surface of the first handle portion 24 forms a first groove 231 that runs through the inner side surface of the second handle portion 25, and the inner side surface of the second handle portion 25 forms a second groove 232 that runs through the inner side surface of the second handle portion 25. When the first handle portion 24 and the second handle portion 25 are combined, the first groove 231 and the second groove 232 jointly form a welding pin installation hole 23. Of course, the grinding handle 2 of the present invention is not limited to the above form.

[0037] See also Figure 6 Specifically, the first groove 231 is a circular arc groove adapted to the welding pin, and the second groove 232 is a V-shaped groove, and the two side walls of the V-shaped groove are used to abut the welding pin 4. By providing the V-shaped groove, it is easy to fix the welding pin 4, so that the welding pin 4 will not easily rotate along the welding pin mounting hole 23 during grinding. Of course, the utility model is not limited to this.

[0038] In a specific example, the angle a of the V-shaped groove is preferably 90-135°. Of course, the size of the angle of the V-shaped groove is not limited thereto.

[0039] See also Figure 4 In some embodiments, the mounting portion 22 is formed on the first handle portion 24 , and the top of the second handle portion 25 protrudes toward one side of the first handle portion 24 to form a limiting portion 26 , which is arranged on the top surface of the first handle portion 24 .

[0040] After the first handle portion 24 is mounted on the positioning base 1, the second handle portion 25 is combined with the first handle portion 24, so that during grinding, the top of the welding needle 4 can be pressed while holding the grinding handle 2. In the specific example, the number of the limiting portions 26 is two, but it is certainly not limited to this. In addition, the present invention is not limited to the manner in which the second handle portion 25 is mounted on the top of the first handle portion 24 through the limiting portion 22.

[0041] See also Figure 7 Specifically, the included angle b between the two mounting portions 22 and the first groove 231 is preferably in the range of 90°±0.5°.

[0042] Specifically, the grinding handle 2 and the positioning base 1 can be made of high-hardness metal such as steel. Of course, the present invention is not limited to this.

[0043] In order to facilitate the understanding of the present invention, the use process of the welding needle grinding device in the example of the present invention is briefly described below, which should not be regarded as a limitation of the present invention.

[0044] First, the mounting portion 22 of the first handle portion 24 is placed on the first slide rails 14 on both sides of the base 12, and then the positioning cover plate 13 is covered on the upper part of the base 12, wherein the upper part of the first handle portion 24 passes through the middle hollow of the positioning cover plate 13. The positioning cover plate 13 and the base 12 are fixed with screws 16.

[0045] Next, the assembly of the positioning base 1 and the first handle portion 24 is placed on the sandpaper 3 , so that the sliding space 11 corresponds to the middle grinding area of ​​the sandpaper 3 .

[0046] Next, place the welding needle 4 in the arc groove of the first handle part 24, and then combine the second handle part 25 to the first handle part 24, wherein the V-shaped groove of the second handle part 25 fits snugly with the outer wall of the welding needle 4, and the two limiting parts 26 of the second handle part 25 rest on the top of the first handle part 24.

[0047] Next, pinch the first handle portion 24 and the second handle portion 25 by hand, fix the welding needle 4 in the welding needle mounting hole 23, and press down the top end of the welding needle 4 by hand so that the bottom end of the welding needle 4 fits with the sandpaper 3;

[0048] Next, hold the first handle part 24 and the second handle part 25, slide back and forth along the first slide rail 14 and the second slide rail 15, and press down the top of the welding needle 4 in real time, so that the bottom end of the welding needle 4 is attached to the sandpaper 3 and ground until the bottom surface of the welding needle 4 is ground flat.

[0049] The above disclosure is only a preferred example of the present invention, and its role is to facilitate the technical personnel in this field to understand and implement it. Of course, it cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the utility model patent of the present invention still fall within the scope covered by the present invention.

Claims

1. A welding needle grinding device, characterized in that: include: A positioning base, the bottom surface of which is a plane, the positioning base is pressed onto the flat sandpaper through the bottom surface, and a sliding space penetrating from top to bottom is provided in the middle of the positioning base; A grinding handle, the grinding handle includes a handle body and a mounting portion connected to the handle body, the handle body is provided with a welding pin mounting hole which passes through the handle body from top to bottom, the handle body is arranged in the sliding space so that the welding pin contacts the sandpaper located at the lower side of the sliding space, the mounting portion is slidably arranged on the positioning base, the positioning base limits the mounting portion from sliding on a first plane, the first plane is parallel to the bottom surface, and when the mounting portion slides on the positioning base, the welding pin remains perpendicular to the bottom surface.

2. The welding needle grinding device according to claim 1, characterized in that: The mounting portion is connected at a position close to the bottom of the handle body.

3. The welding needle grinding device according to claim 1, characterized in that: The two opposite sides of the handle body extend outwards to form two mounting parts.

4. The welding needle grinding device according to claim 1, characterized in that: The positioning base includes a base and a positioning cover fixedly mounted on the base, the bottom surface of the positioning base is formed on the base, the sliding space is formed on the base and the positioning cover, and the mounting portion is slidably disposed between the base and the positioning cover.

5. The welding needle grinding device according to claim 4, characterized in that: The base is provided with first slide rails protruding upwards on both sides of the sliding space, and the grinding handle is mounted on the first slide rails through the mounting portion.

6. The welding needle grinding device according to claim 5, characterized in that: The positioning cover plate is provided with second slide rails protruding downwards on both sides of the sliding space respectively, and the mounting portion is slidably arranged on the second slide rails.

7. The welding needle grinding device according to claim 1, characterized in that: The grinding handle includes a first handle part and a second handle part arranged opposite to each other, the inner side surface of the first handle part forms a first groove running through from top to bottom, and the inner side surface of the second handle part forms a second groove running through from top to bottom, and when the first handle part and the second handle part are combined, the first groove and the second groove jointly form the welding pin mounting hole.

8. The welding needle grinding device according to claim 7, characterized in that: The first groove is an arc groove adapted to the welding needle, and the second groove is a V-shaped groove, and the two side walls of the V-shaped groove are used to abut against the welding needle.

9. The welding needle grinding device according to claim 7 or 8, characterized in that: The mounting portion is formed on the first handle portion, and the top of the second handle portion protrudes toward one side of the first handle portion to form a limiting portion, and the limiting portion is arranged on the top surface of the first handle portion.

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