A portable strong pulling screw for thin plate mold assembly

Abstract

The utility model provides a strong pulling screw rod for a portable thin plate mold assembly, comprising a connecting rod, one end of the connecting rod is provided with a rectangular thread, the other end is vertically fixed with a limit block, the connecting rod and the limit block form a T-shaped structure as a whole; the connecting rod and the limit block can be formed in one piece or spliced ​​in parts; during the loading and unloading process, one end with the limit block only needs to be rotated 90 degrees, and the other end is tightened or loosened by a nut, so that the mold of the epoxy resin dry-type transformer coil can be assembled and disassembled. The utility model has the characteristics of convenient loading and unloading, high efficiency, good wear resistance, long service life and anti-slip.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformer mold assembly, in particular to a strong pulling screw for portable thin plate mold assembly. Background Art

[0002] In the prior art, the assembly of the epoxy resin dry-type transformer coil mold is to insert four pull screws (material: Q235A; the thread is ordinary thread and both ends are threaded) from the lower end plate of the coil before the inner mold is assembled, and the upper end press frame is inserted, and the inner and outer molds are tightened by tightening the nuts at the upper ends of the pull screws, so as to achieve a tightening and sealing effect. Each coil requires four pull screws, and the insertion and extraction of the pull screws require the lower end plate to be erected. When inserting the pull screws, the four pull screws are prone to scattering around, and the lower end of the pull screw needs to be fixed with a wrench when tightening and loosening the nuts. However, when installing and disassembling the pull screws, the lower end plate needs to be erected, and then the four pull screws are inserted or pulled out, and the upper and lower ends of the screws are locked with nuts. The operation is cumbersome and the operating efficiency is extremely low. The wear resistance of the screws is poor and the service life is short. At the same time, there is also a safety hazard of slipping of the screws during the lifting of the mold. Summary of the invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the utility model is to provide a portable strong pulling screw for thin plate mold assembly, by setting a limiting block at one end of the connecting rod, so that the whole forms a T-shaped structure; during the loading and unloading process, the end with the limiting block only needs to be rotated 90°, and the other end is tightened or loosened by tightening the nut, so that the mold assembly and disassembly of the epoxy resin dry-type transformer coil can be realized, which has the characteristics of convenient loading and unloading, high efficiency, good wear resistance, long service life, and anti-slip.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A portable strong pulling screw for thin plate mold assembly comprises a connecting rod 1, one end of which is provided with a rectangular thread 4, and the other end is vertically fixed with a limit block 2, and the connecting rod 1 and the limit block 2 form a T-shaped structure as a whole.

[0006] The connecting rod 1 and the limiting block 2 can be formed in one piece or in separate pieces.

[0007] The limiting block 2 is provided with a groove 3 matched with the connecting rod 1 , and the connecting rod 1 is welded in the groove 3 .

[0008] A Tr12 rectangular thread 4 is provided at a position of 100 to 160 mm on one end of the connecting rod 1 , and the pitch of the rectangular thread 4 is 2 to 3 mm.

[0009] The size of the limit block 2 is 30-50 mm in length, 12-16 mm in width, and 12-16 mm in height.

[0010] The dimensions of the groove 3 are groove width 12-16 mm, groove depth 4-6 mm, and groove length 12-16 mm.

[0011] The material of the connecting rod 1 and the limit block 2 is 45# steel grade 8.8.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. The utility model designs the strong pull screw into a T-shaped structure. When using it, you only need to align it with the oblong hole reserved on the lower end plate, insert it, and then rotate it 90° to complete the installation operation; when removing the pull screw, you only need to rotate it 90° and then pull it out, making the whole process of loading and unloading more convenient.

[0014] 2. Compared with the traditional method of fastening nuts at both ends, the T-shaped structure is more stable, less likely to slip, and has higher operational safety performance.

[0015] 3. The connecting rod 1 and the limit block 2 can be formed in one piece or welded in parts, which is flexible in design and can be applied to different usage scenarios. The one-piece forming method can simplify the production process, reduce assembly steps, and improve production efficiency; the split splicing method can weld the limit block 2 on the basis of the traditional pull screw, which reduces the production cost and has higher economic benefits.

[0016] 4. The material selection of the connecting rod 1 and the limit block 2 of the utility model is 45# steel grade 8.8, and the thread is set as a rectangular thread 4, which improves the wear resistance of the pull screw, reduces the generation of iron filings, and avoids the annealing of the pull screw due to long-term use in a high temperature environment, resulting in the "disengagement" phenomenon. The pitch of the rectangular thread 4 is increased to 2-3mm, which increases the service life of the thread, and also shortens the time of screwing the nut 9, enhances the connection performance, and improves production efficiency.

[0017] In summary, the utility model designs the traditional pull screw into a unique T-shaped structure, so that the installation and disassembly process is simpler and faster, and at the same time improves the stability of the product, prolongs the service life, and has higher economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the connecting rod 1 and the limiting block 2 of the utility model formed in one piece.

[0019] Figure 2 It is a schematic structural diagram of the separate splicing of the connecting rod 1 and the limiting block 2 of the utility model.

[0020] Figure 3It is a schematic diagram of the overall structure of the utility model in the installed state.

[0021] Figure 4 It is a schematic diagram of the structure when the utility model is installed when viewed from above.

[0022] Figure 5 It is a schematic diagram of the top view of the structure of the utility model in the installed state. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] See also Figure 1 , Figure 2 A portable strong pulling screw for thin plate mold assembly includes a connecting rod 1, one end of the connecting rod 1 is provided with a rectangular thread 4, and the other end is vertically fixed to the connecting rod 1 and a limit block 2 is provided, and the connecting rod 1 and the limit block 2 form a T-shaped structure as a whole. Compared with the traditional method of fastening nuts at both ends, the T-shaped structure is more stable, not easy to slip, and has higher operating safety performance.

[0025] The connecting rod 1 and the limiting block 2 can be formed in one piece or in separate pieces.

[0026] like Figure 2 As shown, a groove 3 adapted to the connecting rod 1 is formed in the limiting block 2 , and the connecting rod 1 is welded in the groove 3 .

[0027] like Figure 1 , Figure 2 As shown, a Tr12 rectangular thread 4 is provided at a position of 100 to 160 mm at one end of the connecting rod 1, and the pitch of the rectangular thread 4 is 2 to 3 mm. The increased pitch shortens the time for screwing the nut, enhances the connection performance, and further improves the work efficiency.

[0028] The size of the limit block 2 is 30-50 mm in length, 12-16 mm in width, and 12-16 mm in height.

[0029] The dimensions of the groove 3 are groove width 12-16 mm, groove depth 4-6 mm, and groove length 12-16 mm.

[0030] The material of the connecting rod 1 and the limit block 2 is 45# steel grade 8.8. The rectangular thread 4 set at one end of the connecting rod 1 greatly improves the wear resistance of the pull screw, reduces the generation of iron filings, and avoids the pull screw annealing and "disengagement" caused by long-term use in high temperature environment.

[0031] The working principle of the utility model is:

[0032] See also Figure 3 , Figure 4 and Figure 5In the process of forming the epoxy resin dry-type transformer coil, four T-shaped strong pulling screws can be inserted through the long holes 8 of the lower end plate 7 of the coil before forming the inner mold, and the upper press-fit frame 5 can be passed out. The lower end plate 7 and the press-fit frame 5 have corresponding long holes 8. The connecting rod 1 only needs to be aligned with the long hole 8 reserved on the lower end plate 7 and inserted. After the limit block 2 is rotated 90° at the innermost large circular hole position of the long hole 8 of the lower end plate 7, the installation operation can be completed by moving it to any position of the long hole 8. The upper part is tightened by tightening the nut 9 on the connecting rod 1 to tighten the inner mold 6, so as to achieve a tightening and sealing effect. When removing the pulling screw, first loosen the nut 9 on the upper press-fit frame 5, and then rotate the lower limit block 2 90° and pull it out from the long hole 8. The whole process is convenient for loading and unloading, and there is no need to flip the lower end plate 7 back and forth, thereby improving production efficiency.

Claims

1. A strong pulling screw for portable thin plate mold assembly, characterized in that: The invention comprises a connecting rod (1), one end of which is provided with a rectangular thread (4), and the other end of which is provided with a limit block (2) vertically fixed to the connecting rod (1); the connecting rod (1) and the limit block (2) form a T-shaped structure as a whole.

2. A strong pulling screw for portable thin plate mold assembly according to claim 1, characterized in that: The connecting rod (1) and the limiting block (2) can be formed in one piece or can be spliced ​​in parts.

3. A strong pulling screw for portable thin plate mold assembly according to claim 1, characterized in that: The limiting block (2) is provided with a groove (3) adapted to the connecting rod (1), and the connecting rod (1) is welded in the groove (3).

4. A portable strong pulling screw for thin plate mold assembly according to claim 1, characterized in that: A Tr12 rectangular thread (4) is provided at a position 100 to 160 mm on one end of the connecting rod (1), and the pitch of the rectangular thread (4) is 2 to 3 mm.

5. A portable strong pulling screw for thin plate mold assembly according to claim 1, characterized in that: The dimensions of the limit block (2) are 30 to 50 mm in length, 12 to 16 mm in width, and 12 to 16 mm in height.

6. A strong pulling screw for portable thin plate mold assembly according to claim 3, characterized in that: The dimensions of the groove (3) are groove width 12-16 mm, groove depth 4-6 mm, and groove length 12-16 mm.

7. A portable strong pulling screw for thin plate mold assembly according to any one of claims 1 to 5, characterized in that: The material selected for the connecting rod (1) and the limit block (2) is 45# steel grade 8.8.

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