A riveting gun head and riveting gun for riveting nuts for water-cooled plates of new energy batteries

Abstract

This utility model relates to a riveting gun head and a riveting gun for riveting nuts on water-cooled plates of new energy batteries. It is used to position the riveting nut, which includes a flange with a flange face and a boss. The riveting gun head includes a gun head body with an abutment surface at its front end. The abutment surface has a countersunk hole, the width of which is greater than the width of the boss, and the depth of which is equal to the height of the boss. The boss is inserted into the countersunk hole, and the abutment surface is in close contact with the flange face. This utility model effectively improves the perpendicularity between the riveting gun head and the riveting nut, ensuring that the riveting gun head can evenly press down on the flange, and the sealant at the bottom of the flange is compressed evenly, thereby improving the product yield.

Description

Technical Field

[0001] This utility model relates to the field of riveting technology, and in particular to a riveting gun head and riveting gun for riveting nuts for water-cooled plates of new energy batteries. Background Technology

[0002] In the production process of the new energy battery casing roll forming box project, a water-cooled plate needs to be connected to the bottom protective plate of the roll forming box to dissipate heat from the battery modules inside the roll forming box. According to current production requirements, after the bottom protective plate is riveted with nuts, the gap between the nuts and the water-cooled plate must be less than or equal to 0.05mm to ensure that the product's airtightness meets the standard. However, in actual production, it was found that when 100 nuts are riveted, only about 40% of the rivet nuts have a gap that meets the standard with the water-cooled plate, while the remaining 60% of the rivet nuts have a gap greater than 0.05mm. This is because it is difficult to ensure the perpendicularity of the riveting gun head to the nut during riveting. When the riveting gun head presses down on the rivet nut, the sealant under the large flange surface of the rivet nut is not effectively and evenly compressed, resulting in an excessive gap between the rivet nut and the water-cooled plate after riveting, ultimately leading to the risk of insufficient airtightness in the product.

[0003] In an attempt to temporarily improve the pass rate of airtightness testing, the production site adopted an emergency measure of manually applying sealant to unqualified rivets. This not only increased production costs but also extended the production cycle, severely restricting production efficiency. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the large perpendicularity deviation between the riveting gun head and the flange in the prior art, which causes uneven axial pressure of the riveting gun head on the flange, and the sealant at the bottom of the flange is not compressed evenly. As a result, there is a gap of more than 0.05 mm between the flange and the water-cooling plate after riveting, leading to insufficient airtightness of the product. Therefore, this utility model provides a riveting gun head and riveting gun for riveting nuts of water-cooling plates for new energy batteries, which effectively improves the perpendicularity between the riveting gun head and the riveting nut, ensures that the riveting gun head can press down on the flange evenly, and compresses the sealant at the bottom of the flange evenly, thereby improving the product yield.

[0005] To solve the above-mentioned technical problems, this utility model provides a riveting gun head for riveting nuts on water-cooled plates of new energy batteries. It is used to position the riveting nut, which includes a flange with a flange face and a boss. The riveting gun head includes…

[0006] The gun head body has an abutment surface at its front end, and the abutment surface has a countersunk hole. The width of the countersunk hole is greater than the width of the boss, and the depth of the countersunk hole is equal to the height of the boss. The boss is inserted into the countersunk hole, and the abutment surface is in close contact with the flange surface.

[0007] In one embodiment of this utility model, the countersunk hole is located at the center of the abutment surface.

[0008] In one embodiment of this utility model, the gun head body is provided with a through hole that passes through the countersunk hole, and the axis of the through hole is perpendicular to the abutment surface.

[0009] In one embodiment of this utility model, the gun head body is provided with a receiving cavity, and the receiving cavity communicates with the through hole.

[0010] In one embodiment of this utility model, the rear end of the gun head body is provided with external threads.

[0011] In one embodiment of this utility model, a step is provided at the junction of the front end and the rear end.

[0012] In one embodiment of this utility model, the front end is a cylinder, and the end face of the cylinder is set as the abutment surface.

[0013] In one embodiment of this utility model, the cylinder and the flange are coaxially arranged.

[0014] In one embodiment of this utility model, the countersunk hole is configured as a circular countersunk hole or a polygonal countersunk hole.

[0015] In one embodiment of this utility model, the countersunk hole and the through hole are coaxially arranged, and the diameter of the countersunk hole is larger than the diameter of the through hole.

[0016] A riveting gun, comprising the aforementioned riveting gun head.

[0017] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0018] The riveting gun head of this utility model, during riveting, inserts the boss into the countersunk hole. The precise fit between the countersunk hole and the boss achieves accurate axial and radial positioning of the flange, and the contact surface is tightly attached to the flange surface. This not only increases the contact area between the riveting nut and the gun head body, improving the contact stability between the flange and the gun head body, but also avoids off-center loading, ensuring that the axis of the riveting nut coincides with the pressure of the gun head body. This, in turn, ensures the perpendicularity between the riveting nut and the riveting gun head, allowing the sealant to be compressed evenly by the flange, effectively improving the problem of insufficient airtightness after riveting and reducing production costs. Attached Figure Description

[0019] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the riveting gun head in a preferred embodiment of the present invention;

[0021] Figure 2 for Figure 1 The cross-sectional view of the riveting gun head shown;

[0022] Figure 3 for Figure 1 The cross-sectional view of the riveting gun head is shown.

[0023] Explanation of reference numerals in the accompanying drawings: 1. Gun head body; 11. Front end; 111. Abutment surface; 112. Countersunk hole; 113. Through hole; 114. Step; 12. Rear end; 121. External thread; 13. Receiving cavity; 2. Rivet nut; 21. Threaded section; 22. Deformed section; 23. Flange; 231. Boss; 232. Flange face; 24. Connecting hole; 3. Pull bolt; 4. Sealant; 5. Clearance. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention. Example 1

[0025] Reference Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment of this utility model, a riveting gun head for riveting nuts to water-cooled plates of new energy batteries is disclosed. This head is used to position the riveting nut 2. The riveting nut 2 includes a flange 23, the flange 23 having a flange face 232, and the flange face 232 having a boss 231. The riveting gun head includes…

[0026] The gun head body 1 has a front end 11 with an abutment surface 111. The abutment surface 111 has a countersunk hole 112. The width of the countersunk hole 112 is greater than the width of the boss 231. The depth of the countersunk hole 112 is equal to the height of the boss 231. The boss 231 is inserted into the countersunk hole 112. The abutment surface 111 is in close contact with the flange surface 232.

[0027] The riveting gun head for riveting nuts of water-cooled plates for new energy batteries described in this embodiment inserts the boss 231 into the countersunk hole 112 during riveting. The precise fit between the countersunk hole 112 and the boss 231 achieves precise axial and radial positioning of the flange 23, and the contact surface 111 is in close contact with the flange surface 232. This not only increases the contact area between the riveting nut 2 and the gun head body 1 and improves the contact stability between the flange 23 and the gun head body 1, but also avoids off-center loading and ensures that the axis of the riveting nut 2 coincides with the pressure of the gun head body 1. This ensures the perpendicularity between the riveting nut 2 and the riveting gun head, allowing the sealant 4 to be compressed evenly by the flange 23. This effectively improves the problem of insufficient air tightness after riveting and reduces production costs.

[0028] Reference Figure 2 As shown, in one embodiment of this utility model, the riveting nut 2 further includes a deformable section 22 connecting the flange 23 and a threaded section 21 connecting the deformable section 22. The flange 23 is provided with a connecting hole 24 that extends through the deformable section 22 and the threaded section 21. The hole wall of the threaded section 21 is provided with internal threads. The boss 231 is configured as an annular boss 231 surrounding the end of the connecting hole 24. When the axial tensile force on the threaded section 21 reaches a set value, the deformable section 22 can expand and deform radially. The deformable section 22 and the flange 23 rivet the water-cooling plate and the bottom guard plate tightly from both sides.

[0029] Reference Figure 3 As shown, in one embodiment of this utility model, the countersunk hole 112 is located at the center of the abutment surface 111, so that the pressure of the gun head body 1 is strictly transmitted along the axis of the riveting nut 2, reducing the warping of the flange 23 caused by the eccentric bending moment.

[0030] Reference Figure 2 As shown, in one embodiment of this utility model, the gun head body 1 is provided with a through hole 113 that passes through the countersunk hole 112. The through hole 113 is used for the core-pulling bolt 3 to pass through. The core-pulling bolt 3 is used to provide axial tension to the threaded section 21, so that the deformable section 22 expands and deforms. The axis of the through hole 113 is perpendicular to the abutment surface 111, ensuring that the axial tension of the core-pulling bolt 3 is perpendicular to the abutment surface 111, and the pressure of the abutment surface 111 is uniformly applied to the flange surface 232.

[0031] Reference Figure 3 As shown, in one embodiment of this utility model, the gun head body 1 is provided with a receiving cavity 13, and the receiving cavity 13 communicates with the through hole 113. The receiving cavity 13 is used to collect debris and can also be used to install the core bolt 3. Before riveting, the core bolt 3 passes through the through hole 113 and out of the gun head body 1, and is inserted into the connecting hole 24 and threadedly connected to the internal thread until the boss 231 is inserted into the countersunk hole 112, and the abutting surface 111 is close to the flange surface 232, so as to realize the clamping of the riveting nut 2.

[0032] Reference Figure 3 As shown, in one embodiment of the present invention, the rear end 12 of the gun head body 1 is provided with an external thread 121, and the gun head body 1 is connected to the internal thread interface of the riveting gun through the external thread 121, so as to realize the detachable connection between the two.

[0033] Reference Figure 3 As shown, in one embodiment of the present invention, a step 114 is provided at the junction of the front end 11 and the rear end 12. The step 114 provides a limit for the gun head body 1, ensuring that the gun head body 1 is quickly connected in place.

[0034] Reference Figure 2 As shown, in one embodiment of this utility model, the front end 11 is a cylinder, and the end face of the cylinder is set as the abutment surface 111. The circular end face of the cylinder acts on the flange surface 232, which can make the flange 23 be subjected to uniform pressure and avoid the flange surface 232 from failing to uniformly compress the bottom sealant 4 due to local stress concentration.

[0035] Reference Figure 2 As shown, in one embodiment of this utility model, the cylinder and the flange 23 are coaxially arranged, and the center of the circular end face of the cylinder coincides with the center of the flange 23. The flange 23 can be evenly pressed by the gun head body 1, and the sealant 4 at the bottom of the flange 23 can be compressed evenly and adhered to the water cooling plate, thereby reducing the gap caused by the sealant 4 not being compressed evenly.

[0036] Reference Figure 2 As shown, in one embodiment of this utility model, the countersunk hole 112 is set as a circular countersunk hole 112, which matches the circular boss 231. The diameter of the countersunk hole 112 is 10.5mm, and the diameter of the boss 231 is 10mm. A 0.25mm single-sided clearance is formed between the inner wall of the countersunk hole 112 and the side wall of the boss 231. In other embodiments, the countersunk hole 112 can be set as a polygonal countersunk hole 112, such as a regular hexagonal countersunk hole 112. The regular hexagonal countersunk hole 112 can match the regular hexagonal boss 231 to prevent the flange 23 from slipping.

[0037] Reference Figure 3 As shown, in one embodiment of the present invention, the countersunk hole 112 and the through hole 113 are coaxially arranged, and the diameter of the countersunk hole 112 is larger than the diameter of the through hole 113.

[0038] In one embodiment of this utility model, the width refers to the radial length of the rivet nut, and the width and height refer to the axial length of the rivet nut.

[0039] The working principle of the riveting gun head described in this utility model is as follows:

[0040] By rotating the core-pulling bolt 3, one end is screwed into the connecting hole 24 of the riveting nut 2 until the abutment surface 111 is in contact with the flange surface 232 and the boss 231 is inserted into the countersunk hole 112, the riveting nut 2 is clamped. Then, the deformed section 22 and the threaded section 21 of the clamped riveting nut 2 are passed through the riveting holes of the water-cooling plate and the bottom guard plate until the sealant 4 under the flange 23 contacts the water-cooling plate. Then, keeping the gun head body 1 still, the core-pulling bolt 3 is pulled axially. The core-pulling bolt 3 generates axial tension, which drives the threaded section 21 to approach the water-cooling plate. When the tension of the core-pulling bolt 3 reaches the set value, the deformed section 22 expands and deforms radially, so that the deformed section 22 and the flange 23 form a biting force on both sides of the water-cooling plate and the bottom guard plate, completing the riveting. Then, the core-pulling bolt 3 is unscrewed out of the connecting hole 24. Example 2

[0041] A riveting gun includes a riveting gun head, the external thread 121 of which is connected to the threaded interface of the riveting gun, and a driving mechanism of the riveting gun for driving the core-pulling bolt 3 to rotate and move along an axis.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A riveting gun head for riveting nuts on water-cooled plates of new energy batteries, used for positioning the riveting nut, wherein the riveting nut includes a flange, the flange has a flange face, and the flange face has a boss, characterized in that... The riveting gun head includes, The gun head body has an abutment surface at its front end, and the abutment surface has a countersunk hole. The width of the countersunk hole is greater than the width of the boss, and the depth of the countersunk hole is equal to the height of the boss. The boss is inserted into the countersunk hole, and the abutment surface is in close contact with the flange surface.

2. The riveting gun head for riveting the nut of the water cooling plate of the new energy battery according to claim 1, characterized in that, The countersunk hole is located at the center of the contact surface.

3. The riveting gun head for riveting the nut of the water cooling plate of the new energy battery according to claim 1, characterized in that, The gun head body is provided with a through hole that passes through the countersunk hole, and the axis of the through hole is perpendicular to the abutment surface.

4. The riveting gun head for riveting the nut of the water cooling plate of the new energy battery according to claim 3, characterized in that, The gun head body is provided with a receiving cavity, and the receiving cavity communicates with the through hole.

5. The riveting gun head for riveting nuts on a water-cooled plate of a new energy battery according to claim 1, characterized in that, The rear end of the gun head body is provided with external threads.

6. The riveting gun head for riveting the nut of the water cooling plate of the new energy battery according to claim 5, characterized in that, A step is provided at the junction of the front end and the rear end.

7. The riveting gun head for riveting the nut of the water cooling plate of the new energy battery according to claim 1, characterized in that, The front end is a cylinder, and the end face of the cylinder is set as the abutment surface.

8. The riveting gun head for riveting the nut of the water cooling plate of the new energy battery according to claim 7, characterized in that, The cylinder is coaxially arranged with the flange.

9. The riveting gun head for riveting the nut of the water cooling plate of the new energy battery according to claim 1, characterized in that, The countersunk hole is configured as a circular countersunk hole or a polygonal countersunk hole.

10. A rivet gun characterized by, Includes the riveting gun head as described in any one of claims 1-9.

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