Intermediate crossbeam clamping nut tightening device

Abstract

This utility model discloses a tightening device for a middle crossbeam clamping nut, belonging to the technical field of electric vehicle assembly equipment. It includes a wrench, a collar, and two clamping blocks. The lower part of each clamping block is larger than its upper part, and the two clamping blocks can fit together. The lower parts of the two clamping blocks can be fitted onto the outer wall of the clamping nut. The upper surfaces of the two clamping blocks that fit together have slots. When the two clamping blocks are fitted together, the two slots form a tightening hole. The collar fits onto the upper parts of the two clamping blocks. One end of the wrench has a column, and the column has a tightening bit adapted to the tightening hole. This utility model solves the problem that existing open-end wrenches, when tightening clamping nuts, suffer from insufficient tightening torque due to interference from the T-beam and the battery cell, leading to loosening of the clamping nut.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric vehicle assembly equipment, specifically relating to a tightening device for the clamping nut of the middle crossbeam of a battery pack. Background Technology

[0002] A common type of battery pack for electric vehicles mainly includes a lower housing 1, an upper housing 2, and a cell module 3, with the cell module 3 located between the lower housing 1 and the upper housing 2 (e.g., Figure 1 As shown), the lower housing 1 is provided with multiple lifting posts 11, and the upper housing 2 has screw holes 21 on the top cover corresponding to the lifting posts 11. The battery cell module 3 includes a middle crossbeam 31 and a T-shaped beam. The lifting posts 11 of the lower housing 1 pass through the middle crossbeam 31 of the battery cell module 3, and then the clamping nuts 4 with screws at the bottom are screwed into the screw holes of the lifting posts 11 (as shown). Figure 2 As shown), tighten the clamping nut 4 so that its head presses against the middle crossbeam 31. Then, the upper casing 2 is placed on top of the lower casing 1. Finally, bolts are screwed into the clamping nut 4 through the screw hole 21 on the upper casing to complete the battery pack assembly. However, the clamping nut 4 can currently only be tightened using the existing open-end wrench 5. During the process of clamping and turning the clamping nut 4, the open-end wrench 5 will interfere with the T-beam 32 and the battery cell 33 (e.g., Figure 3 As shown in the figure, the tightening torque of the clamping nut 4 is insufficient, resulting in the lower housing 1 and the battery cell module 3 becoming loose, which poses a safety hazard. Utility Model Content

[0003] The problem solved by this utility model is to provide a tightening device for the intermediate crossbeam clamping nut, so as to solve the problem that the existing open-end wrench is subject to interference from the T-beam and the battery cell when tightening the clamping nut, resulting in insufficient tightening torque and loosening of the clamping nut.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows: it includes a screw wrench, a collar, and two clamping blocks. The lower part of the clamping blocks is larger than the upper part. The two clamping blocks can fit together. The lower part of the two clamping blocks can be fitted onto the outer wall of the clamping nut. The upper parts of the two clamping blocks have grooves on their mating surfaces. After the two clamping blocks are fitted together, the two grooves form a screw-on hole. The collar fits onto the upper part of the two clamping blocks. One end of the screw wrench is provided with a column. The column is provided with a screw-on bit that matches the screw-on hole.

[0005] A more specific technical solution than the above-mentioned technical solution is that the lower inner wall of the clamping block is provided with a clamping surface that fits against the tightening surface of the clamping nut.

[0006] Furthermore, the height of the column is greater than the height of the T-beam.

[0007] Furthermore: the two slots form a polygonal screw hole, and the column is provided with a polygonal screw bit that is adapted to the screw hole.

[0008] Furthermore: the screw hole is a square through hole, and the screw bit is a square bit.

[0009] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: by using the lower part of two clamping blocks to fit onto the outer wall of the clamping nut, and then using a collar to fit onto the upper part of the two clamping blocks to clamp the two clamping blocks together, the clamping nut can be tightened by inserting the tightening bit of the wrench into the tightening hole formed between the two clamping blocks. The column can effectively prevent the wrench from being interfered with by the T-beam and the battery cell during the tightening process, ensuring that the clamping nut has sufficient tightening torque to make the lower housing and the battery cell module tightly connected, effectively avoiding the problem of loosening. Attached Figure Description

[0010] Figure 1 This is an assembly diagram of the battery pack.

[0011] Figure 2 This is a schematic diagram showing the connection between the lower casing and the battery cell module.

[0012] Figure 3 This is a schematic diagram of how to tighten a nut using an existing open-end wrench.

[0013] Figure 4 This is a schematic diagram of the structure of this utility model.

[0014] Figure 5 This is a schematic diagram of the clamping block and collar of this utility model.

[0015] Figure 6 and Figure 7 This is an assembly diagram of tightening the nut using this utility model.

[0016] In the diagram: 1. Lower housing; 11. Lifting point column; 2. Upper housing; 21. Top cover screw hole; 3. Battery cell module; 31. Middle crossbeam; 32. T-beam; 33. Battery cell; 4. Compression nut; 41. Tightening surface; 5. Open-end wrench; 6. Clamping block; 61. Clamping surface; 62. Groove; 63. Upper part; 64. Tightening hole; 7. Collar; 8. Tightening wrench; 81. Column; 82. Tightening bit. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and examples:

[0018] like Figures 4 to 7The shown intermediate crossbeam clamping nut tightening device includes a wrench 8, a collar 7, and two clamping blocks 6. The lower part of the clamping block 6 is larger than the upper part 63. The two clamping blocks 6 can fit together. The lower part of the two clamping blocks 6 can fit onto the outer wall of the clamping nut 4. The lower inner wall of the clamping block 6 is provided with a clamping surface 61 that fits against the tightening surface 41 of the clamping nut 4. The surfaces of the upper parts 63 of the two clamping blocks 6 that fit together are provided with slots 62. After the two clamping blocks 6 are fitted together, the two slots 62 form a tightening hole. 64. Two slots 62 form a square screw hole 64. The column 81 is provided with a square screwdriver bit 82 that matches the screw hole 64. The collar 7 is fitted onto the upper part 63 of the two clamping blocks 6, clamping the two clamping blocks 6 together. One end of the screwdriver 8 is provided with a column 81. The height of the column 81 is greater than the height of the T-beam 32. The screwdriver 8 will not touch the T-beam 32 and the battery cell 33 when rotating. The column 81 is provided with a screwdriver bit 82 that matches the screw hole 64.

[0019] In use, the lifting post 11 of the lower housing 1 passes through the middle crossbeam 31 of the cell 33 module 3. Then, the clamping nut 4 with a screw at the bottom is screwed into the screw hole of the lifting post 11. Then, the lower part of the two clamping blocks 6 is fitted onto the outer wall of the clamping nut 4, so that the clamping surface 61 of the clamping block 6 is in contact with the tightening surface 41 of the clamping nut 4. Then, the collar 7 is fitted onto the upper part 63 of the two clamping blocks 6, so that the two clamping blocks 6 are clamped together. Finally, the square screwdriver bit 82 of the screw wrench 8 is inserted into the square screw hole 64 formed between the two clamping blocks 6 to tighten the clamping nut 4, so that the lower housing 1 and the cell 33 module 3 are tightly connected. Finally, the upper housing 2 is covered onto the lower housing 1, and the bolt is screwed into the clamping nut 4 from the screw hole 21 of the upper cover to complete the assembly of the battery pack.

Claims

1. An intermediate cross member compression nut tightening device, characterized by: The device includes a wrench, a collar, and two clamping blocks. The lower part of each clamping block is larger than the upper part. The two clamping blocks can fit together. The lower parts of the two clamping blocks can be fitted onto the outer wall of a clamping nut. The upper surfaces of the two clamping blocks that fit together have slots. When the two clamping blocks are fitted together, the two slots form a screw-on hole. The collar fits onto the upper parts of the two clamping blocks. One end of the wrench has a post with a screwdriver bit that matches the screw-on hole.

2. The intermediate crossbeam clamping nut tightening device according to claim 1, characterized in that: The lower inner wall of the clamping block is provided with a clamping surface that fits against the tightening surface of the clamping nut.

3. The intermediate crossbeam clamping nut tightening device according to claim 2, characterized in that: The height of the column is greater than the height of the T-beam.

4. The intermediate crossbeam clamping nut tightening device according to claim 3, characterized in that: The two slots form a polygonal screw hole, and the column is provided with a polygonal screw bit that is adapted to the screw hole.

5. The intermediate crossbeam clamping nut tightening device according to claim 4, characterized in that: The screw hole is a square through hole, and the screw bit is a square bit.

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