Pole sealing structure

Abstract

The utility model discloses a pole sealing structure and belongs to the technical field of lead-acid storage batteries. The storage battery cover pole hole structure overcomes the defect that in the prior art, a pole sealing ring of a traditional storage battery cover pole hole structure is poor in sealing performance. The main body structure comprises a battery cover, a pole is installed on the battery cover in a matched mode, an external thread is arranged on a copper core of the pole, a plastic bolt and a sealing ring arranged below the plastic bolt are installed in a pole hole between the pole and the battery cover, and an internal thread matched with the external thread is arranged in the plastic bolt. And the pole is in threaded connection with the plastic bolt through the external thread and the internal thread. The lead-acid storage battery is mainly applied to lead-acid storage batteries.

Description

Technical Field

[0001] This utility model belongs to the field of lead-acid battery technology, and more specifically, it relates to a terminal sealing structure. Background Technology

[0002] Battery terminals are key components of a battery. Their basic structure consists of a cylinder with an embedded copper core and a base. (The basic structure is as follows...) Figure 5 As shown, it is formed by lead alloy casting. Terminal sealing technology is a key technology in the battery production process. Terminal sealing typically uses a sealing ring, and the design of the terminal sealing ring structure is determined by the terminal hole structure of the battery cover. There are generally two types: one is a structure without internal threads, such as... Figure 6 As shown, another type of structure with internal threads, such as... Figure 7 As shown; however, the shortcomings of the above two pole hole structures in pole sealing are:

[0003] 1. Due to the threadless structure for fastening, such as Figure 8 As shown, it cannot compress the pole seal ring; 2. The pole seal ring has poor sealing performance.

[0004] For example, Chinese utility model patent with authorization announcement number CN 209896113U discloses a battery terminal sealing structure, which uses an elastic ring to seal between the terminal and the cover plate. However, its shortcomings are: the locking nut is easy to loosen, resulting in poor sealing effect, and the sealing ring cannot guarantee the compression amount and is easily damaged. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a pole seal structure.

[0006] To achieve the above objectives, this utility model employs the following technical solution:

[0007] A terminal sealing structure includes a battery cover, on which a terminal is fitted. The copper core of the terminal has an external thread. A plastic bolt and a sealing ring located below the plastic bolt are installed in the terminal hole between the terminal and the battery cover. The plastic bolt has an internal thread that mates with the external thread. The terminal is threadedly connected to the plastic bolt through the external thread and the internal thread.

[0008] Preferably, the plastic bolt has a blind hole groove at its internal thread, and the blind hole groove is filled with sealant.

[0009] Preferably, the blind hole groove is a rectangular blind hole groove.

[0010] Preferably, the external thread is a triangular thread.

[0011] Preferably, the sealing ring is an O-ring.

[0012] Preferably, the pole and the plastic bolt are tightened downwards to press the sealing ring at the bottom of the plastic bolt, and the deformation of the sealing ring after the plastic bolt is tightened to the bottom is adjusted by the height of the external thread.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The external thread of the copper core of the pole is a triangular thread, which is formed by machining on the copper core. This solves the problem that the triangular thread cast from lead alloy has insufficient teeth and low hardness, which leads to poor engagement with plastic threads and easy stripping.

[0015] 2. A rectangular blind hole groove is made at the internal thread of the plastic bolt to store sealant. By pouring sealant into the groove, the connection between the internal thread of the plastic bolt and the external thread of the pole is prevented from loosening, thus avoiding the problem of the plastic bolt loosening after long-term use and causing the sealing ring to fail.

[0016] 3. This utility model can maintain an appropriate compression amount for O-rings of different diameters by adjusting the height of the external thread of the pole according to different inner diameter D1 of the pole hole, thereby ensuring the sealing quality of the O-ring;

[0017] 4. This utility model has a simple structure and is easy to operate. It can effectively solve the problem of poor sealing performance of the terminal seal ring caused by the absence of internal threaded terminal hole structure on the battery cover, and has great application and promotion value. Attached Figure Description

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the external thread in this utility model;

[0020] Figure 3 This is a top view of the plastic bolt in this utility model;

[0021] Figure 4 This is a schematic diagram showing the dimensions of Embodiments 3 and 4 of this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of existing battery terminals;

[0023] Figure 6 This is a schematic diagram of the structure of the terminal hole in an existing battery cover;

[0024] Figure 7 This is a schematic diagram of the structure of another type of battery cover terminal hole;

[0025] Figure 8 This is a schematic diagram of the sealing process using an existing pole seal ring.

[0026] In the diagram: 1. Terminal post; 2. Sealant; 3. Plastic bolt; 4. Sealing ring; 5. External thread; 6. Blind hole groove; 7. Battery cover; 8. Terminal post hole. Detailed Implementation

[0027] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

[0028] Example 1:

[0029] like Figure 1-3 As shown, a terminal sealing structure includes a battery cover 7, on which a terminal 1 is fitted. The copper core of the terminal 1 is provided with an external thread 5. A plastic bolt 3 and a sealing ring 4 located below the plastic bolt 3 are installed in the terminal hole 8 between the terminal 1 and the battery cover 7. The plastic bolt 3 is provided with an internal thread that mates with the external thread 5. The terminal 1 is threadedly connected to the plastic bolt 3 through the external thread 5 and the internal thread.

[0030] Example 2:

[0031] A pole sealing structure differs from Embodiment 1 in that the pole 1 and the plastic bolt 3 are tightened downwards to press the sealing ring 4 at the bottom of the plastic bolt 3, and the deformation of the sealing ring 4 after the plastic bolt 3 is tightened to the bottom is adjusted by the height of the external thread 5.

[0032] like Figure 3 As shown, a blind hole groove 6 is provided at the internal thread of the plastic bolt 3, and sealant 2 is poured into the blind hole groove 6; by pouring sealant 2 into the groove, the internal thread of the plastic bolt 3 and the external thread 5 of the pole post are prevented from loosening, thus avoiding the problem of the plastic bolt loosening after long-term use and causing the sealing ring 4 to fail.

[0033] Furthermore, the blind hole groove 6 is a rectangular blind hole groove, and multiple rectangular blind hole grooves can be provided.

[0034] Furthermore, the external thread 5 is a triangular thread, which is formed by machining on the copper core. This solves the problem that the triangular thread cast from lead alloy has incomplete teeth and low hardness, which leads to poor engagement with plastic threads and easy stripping.

[0035] Furthermore, the sealing ring 4 is an O-ring.

[0036] The manufacturing method of this utility model is as follows:

[0037] This utility model involves machining an external thread 5 onto the copper core of the pole post 1, such as... Figure 2As shown, a matching internally threaded plastic bolt 3 with appropriate thread profile and pitch is provided. A rectangular blind hole groove is cut into the internal thread of the plastic bolt 3, as shown... Figure 3 As shown, the sealing ring 4 at the bottom of the plastic bolt 3 is pressed together by the copper external thread 5 of the pole post 1 and the internal thread of the plastic bolt 3. The deformation of the sealing ring 4 after the plastic bolt 3 is fully tightened is adjusted by the height of the external thread 5 to ensure that the sealing ring 4 has sufficient compression. Finally, sealant 2 is poured into the groove of the internal thread of the plastic bolt 3 to prevent the internal thread of the plastic bolt 3 from loosening with the external thread 5 of the pole post 1. The specific structure is as follows. Figure 1 As shown.

[0038] Example 3:

[0039] like Figure 4 As shown, the inner diameter D1 of the pole hole is Φ44mm, the machined external thread 5 is a triangular external thread, and the diameter of the external thread 5 is M28×2mm; the inner thread diameter D2 of the plastic bolt is M28×2mm, and three injection grooves (i.e., blind hole grooves 6) are opened at the thread; the depth H1 of the pole hole is 26mm, the depth H2 of the pole thread is 20mm, and the cross-sectional diameter of the O-ring is 8mm; the plastic bolt 3 is screwed to the bottom to the maximum thread depth, the thickness of the sealing ring 4 after compression is 6mm, and the compression amount of the sealing ring 4 is 25%; finally, epoxy resin sealant 2 is poured into the injection groove of the plastic bolt.

[0040] Example 4:

[0041] For example Figure 4 As shown, the inner diameter D1 of the pole hole is Φ32mm, the machined external thread 5 is a triangular external thread, and the diameter of the external thread 5 is M22×2mm; the inner thread diameter D2 of the plastic bolt is M22×2mm, and four injection grooves (i.e., blind hole grooves 6) are opened at the thread; the depth H1 of the pole hole is 18mm, the depth H2 of the pole thread is 14mm, and the cross-sectional diameter of the O-ring is 5mm; the plastic bolt 3 is screwed to the bottom to the maximum thread depth, the O-ring is compressed to a thickness of 4mm, and the compression of the sealing ring 4 is 25%; finally, epoxy resin sealant 2 is poured into the injection groove of the plastic bolt.

Claims

1. A terminal sealing structure, comprising a battery cover (7), characterized in that: The battery cover (7) is fitted with a terminal post (1). The copper core of the terminal post (1) is provided with an external thread (5). A plastic bolt (3) and a sealing ring (4) are installed in the terminal post hole (8) between the terminal post (1) and the battery cover (7). The plastic bolt (3) is provided with an internal thread that matches the external thread (5). The terminal post (1) is threadedly connected to the plastic bolt (3) through the external thread (5) and the internal thread. The plastic bolt (3) has a blind hole groove (6) at its internal thread, and the blind hole groove (6) is filled with sealant (2).

2. The pole sealing structure according to claim 1, characterized in that: The blind hole groove (6) is a rectangular blind hole groove.

3. The pole sealing structure according to claim 1 or 2, characterized in that: The external thread (5) is a triangular thread.

4. The pole sealing structure according to claim 1 or 2, characterized in that: The sealing ring (4) is an O-ring.

5. The pole sealing structure according to claim 1 or 2, characterized in that: The pole (1) and the plastic bolt (3) are tightened downwards to press the sealing ring (4) at the bottom of the plastic bolt (3), and the deformation of the sealing ring (4) after the plastic bolt (3) is tightened to the bottom is adjusted by the height of the external thread (5).

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