Spot welding joint capable of preventing electrode cap from falling off

Abstract

The spot welding head comprises an electrode contact, an electrode handle and the electrode cap which are sequentially sleeved, a first reinforcing sleeve is sleeved on the outer side of the electrode cap, the upper end of the first reinforcing sleeve is open, the lower end of the first reinforcing sleeve is provided with a first limiting plate, and the first limiting plate is provided with a first avoiding hole with the same section size as the electrode cap. First internal threads are arranged on the inner surface of the upper end of the first reinforcing sleeve, and first external threads matched with the first internal threads are arranged on the outer surface of the lower end of the electrode handle. A first clamping spring surrounding the circumferential surface of the electrode cap is clamped to the electrode cap, and after the first reinforcing sleeve is in threaded connection with the electrode handle, the first clamping spring can be supported on the first limiting plate. The electrode cap has the advantages that the first clamping spring is clamped on the surface of the electrode cap, the electrode cap and the first reinforcing sleeve can be connected into a whole, the electrode cap can be effectively prevented from falling off due to the limiting effect between the first clamping spring and the first limiting plate, and then normal welding efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of spot welding technology, specifically to a spot weld joint that prevents the electrode cap from falling off. Background Technology

[0002] Spot welding is a device that uses resistance heating to join metals. It applies a current to the metal workpieces, generating high temperatures at the contact points, and then uses pressure to join the workpieces together in a short time. In terms of mechanical structure, a spot welding machine mainly consists of a welding head, a clamping device, and a pressure device. The welding head itself comprises an electrode connector, an electrode handle, and an electrode cap.

[0003] In the existing technology, the upper end of the electrode cap is provided with a conical groove, and the lower end of the electrode handle is set with a conical structure. The electrode handle and the electrode cap are connected by the conical fit. In actual use, there is a certain risk of the electrode cap falling off, especially when welding galvanized sheets. The electrode cap is easy to stick to the sheet and cause the electrode cap to fall off. This not only affects the welding efficiency, but also cannot guarantee the safe use of the spot welding machine. Utility Model Content

[0004] In view of this, the present invention provides a spot welding head that prevents the electrode cap from falling off, aiming to avoid the electrode cap falling off and ensure normal welding efficiency.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A spot welding head for preventing electrode cap detachment includes an electrode handle, with an electrode connector and an electrode cap respectively connected to the upper and lower ends of the electrode handle. The electrode cap is characterized by: a first reinforcing sleeve fitted on its outer side; the upper end of the first reinforcing sleeve is open, and the lower end has a first limiting plate; the first limiting plate has a first clearance hole with the same cross-sectional size as the electrode cap; the inner surface of the upper end of the first reinforcing sleeve has a first internal thread; the lower end of the electrode handle has a first external thread that mates with the first internal thread; the electrode cap is secured with a first retaining spring that surrounds its circumferential surface; after the first reinforcing sleeve is threadedly connected to the lower end of the electrode handle, the first retaining spring can be supported on the first limiting plate.

[0007] With the above structure, the electrode cap and the first reinforcing sleeve are connected as one unit by the first retaining spring. Under the restriction of the first retaining spring and the first limiting plate, the electrode cap can be effectively prevented from falling down, thereby ensuring normal welding efficiency.

[0008] Preferably, a second reinforcing sleeve is fitted onto the outer side of the electrode handle. The upper end of the second reinforcing sleeve is open, and the lower end has a second limiting plate. The second limiting plate has a second clearance hole with the same cross-sectional size as the electrode handle. The inner surface of the upper end of the second reinforcing sleeve has a second internal thread, and the outer surface of the lower end of the electrode connector has a second external thread that mates with the second internal thread. The electrode handle is secured with a second retaining spring that wraps around its circumferential surface. After the second reinforcing sleeve is threaded onto the electrode connector, the second retaining spring can support it on the second limiting plate. With the above structure, the electrode handle and the second reinforcing sleeve are connected as one unit by the second retaining spring. The constraint between the second retaining spring and the second limiting plate can effectively prevent the electrode handle from falling downwards.

[0009] Preferably, the electrode cap surface is provided with a first annular groove, the first retaining ring is fitted into the first annular groove, and the outer ring of the first retaining ring protrudes beyond the outer surface of the electrode cap. This structure facilitates a more stable mounting of the first retaining ring onto the electrode cap surface, while also making the interference between the first retaining ring and the first limiting plate more pronounced, further preventing the electrode cap from falling off.

[0010] Preferably, the electrode handle surface is provided with a second annular groove, the second retaining ring is fitted into the second annular groove, and the outer ring of the second retaining ring protrudes beyond the outer surface of the electrode handle. This structure facilitates a more stable mounting of the second retaining ring onto the electrode handle surface, while also making the interference between the second retaining ring and the second limiting plate more pronounced, further preventing the electrode handle from falling off.

[0011] Preferably, the lower end of the second limiting plate extends downward with a sleeve, the inner diameter of which is the same as the cross-sectional size of the electrode handle, and the first external thread is provided on the outer surface of the lower end of the sleeve. This structure allows the first and second reinforcing sleeves to be connected as a single unit, ensuring the structural strength of the entire welded joint.

[0012] Preferably, both the first and second external threads are threaded with tightening nuts. With this structure, the tightening nuts connect to the first and second reinforcing sleeves respectively, ensuring stable installation of the first and second reinforcing sleeves without easy loosening.

[0013] Preferably, the electrode handle has a first tapered portion at its upper end, the electrode connector has a first tapered hole at its lower end that corresponds to the first tapered portion, the electrode handle has a second tapered portion at its lower end, and the electrode cap has a second tapered hole at its upper end that corresponds to the second tapered portion; the second annular groove is located in the area between the first and second tapered portions. This structure facilitates the installation of the electrode connector, electrode handle, and electrode cap.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The spot welding head for preventing electrode cap detachment provided by this utility model can connect the electrode cap and the first reinforcing sleeve into one piece by attaching a first retaining spring to the surface of the electrode cap. Under the restriction between the first retaining spring and the first limiting plate, the electrode cap can be effectively prevented from falling downward, thereby ensuring normal welding efficiency.

[0016] 2. By attaching a second retaining ring to the surface of the electrode handle, the electrode handle and the second reinforcing sleeve can be connected as one unit. Due to the restraining effect between the second retaining ring and the second limiting plate, the electrode handle can be effectively prevented from falling downward.

[0017] 3. The reinforcing sleeve, assembled solely by threads, can prevent the electrode cap and electrode handle from falling off. The reinforcing sleeve not only has the advantages of simple structure and low cost, but also strengthens the overall connection strength of the spot weld joint. Attached Figure Description

[0018] Figure 1 A cross-sectional view of the welded joint to prevent the electrode cap from falling off;

[0019] Figure 2 for Figure 1 Explosion diagram of a midpoint weld joint;

[0020] Figure 3 for Figure 1 An explosion diagram of the reinforcing sleeve in the middle. Detailed Implementation

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0022] like Figures 1 to 3 As shown, a spot welding head for preventing electrode cap detachment includes an electrode handle 2. The upper and lower ends of the electrode handle 2 are respectively connected to an electrode connector 1 and an electrode cap 3. A first reinforcing sleeve 5 is fitted on the outer side of the electrode cap 3. The upper end of the first reinforcing sleeve 5 is open, and the lower end is formed with a first limiting plate 5a. The first limiting plate 5a is formed with a first clearance hole 5a1 with the same cross-sectional size as the electrode cap 3. The inner surface of the upper end of the first reinforcing sleeve 5 is provided with a first internal thread 5b. The outer surface of the lower end of the electrode handle 2 is provided with a first external thread 2a that mates with the first internal thread 5b. The electrode cap 3 is fitted with a first retaining spring 4 that surrounds its circumferential surface. After the first reinforcing sleeve 5 is threadedly connected to the lower end of the electrode handle 2, the first retaining spring 4 can be supported on the first limiting plate 5a.

[0023] The electrode cap 3 and the first reinforcing sleeve 5 can be connected as one unit by the first retaining spring 4. The first reinforcing sleeve 5 is threaded onto the electrode handle 2. When the electrode cap 3 is subjected to a downward force, the limiting effect between the first retaining spring 4 and the first limiting plate 5a can effectively prevent the electrode cap 3 from detaching from the electrode handle 2.

[0024] Furthermore, the electrode cap 3 has a first annular groove 3a formed on its surface, and the first retaining spring 4 is fitted inside the first annular groove 3a. The outer ring of the first retaining spring 4 protrudes beyond the outer surface of the electrode cap 3. This design allows the first retaining spring 4 to be more securely engaged and also restricts its movement, preventing the electrode cap 3 from moving downwards relative to the first retaining spring 4. Alternatively, the first retaining spring 4 can be integrally formed on the surface of the electrode cap 3 to ensure that the restraining effect between the first retaining spring 4 and the first limiting plate 5a prevents the electrode cap 3 from falling downwards.

[0025] Since electrode connector 1 and electrode handle 2 are also installed using a tapered insertion method, electrode handle 2 is also at risk of falling off. Therefore, this embodiment also includes protective measures for electrode handle 2, specifically as follows: Figure 1 As shown, a second reinforcing sleeve 7 is fitted onto the outside of the electrode handle 2. The upper end of the second reinforcing sleeve 7 is open, and a second limiting plate 7a is formed at the lower end. A second clearance hole 7a1 with the same cross-sectional size as the electrode handle 2 is formed on the second limiting plate 7a. A second internal thread 7b is provided on the inner surface of the upper end of the second reinforcing sleeve 7, and a second external thread 1a that mates with the second internal thread 7b is provided on the outer surface of the lower end of the electrode connector 1. A second retaining spring 6 is fitted around the circumferential surface of the electrode handle 2. When the second reinforcing sleeve 7 is threadedly connected to the electrode connector 1, the second retaining spring 6 can be supported on the second limiting plate 7a. The second retaining spring 6 can connect the electrode handle 2 and the second reinforcing sleeve 7 into one unit. Because the second reinforcing sleeve 7 is threadedly fitted onto the electrode connector 1, when the electrode handle 2 is subjected to a downward force, the restraining effect between the second retaining spring 6 and the second limiting plate 7a can prevent the electrode handle 2 from detaching downward.

[0026] Furthermore, a second annular groove 2b is formed on the surface of the electrode handle 2, and the second retaining spring 6 is fitted into the second annular groove 2b, with the outer ring of the second retaining spring 6 protruding outward beyond the outer surface of the electrode handle 2. This design allows the second retaining spring 6 to be engaged more securely and also restricts the second retaining spring 6, preventing the electrode handle 2 from moving downward relative to the second retaining spring 6. Similarly, the second retaining spring 6 can also be integrally formed on the surface of the electrode handle 2, thus ensuring that the restrictive effect between the second retaining spring 6 and the second limiting plate 7a can prevent the electrode handle 2 from falling downward.

[0027] In this embodiment, both the first external thread 2a and the second external thread 1a are threaded with tightening nuts 8, which are connected to the first reinforcing sleeve 5 and the second reinforcing sleeve 7 respectively, so as to ensure that the first reinforcing sleeve 5 and the second reinforcing sleeve 7 are more securely fitted and not easily loosened.

[0028] In this embodiment, the first reinforcing sleeve 5 and the second reinforcing sleeve 7 can be installed separately or connected as a whole, as shown in the following example. Figure 3 As shown, a sleeve 7c extends downward from the lower end of the second limiting plate 7a. The inner diameter of the sleeve 7c is the same as the cross-sectional size of the electrode handle 2. At this time, the first external thread 2a is formed on the outer surface of the lower end of the sleeve 7c, and the second reinforcing sleeve 7 is threadedly installed at the lower end of the sleeve 7c. With this design, when the first reinforcing sleeve 5 and the second reinforcing sleeve 7 are both threadedly assembled, they can completely cover the electrode handle 2. This not only protects the electrode handle 2 from being adhered to by the splashed welding material, but also increases the overall structural strength of the spot weld joint.

[0029] like Figure 2 As shown, the upper end of the electrode handle 2 is formed with a first conical portion 2c, the lower end of the electrode connector 1 is provided with a first conical hole 1b that is adapted to the first conical portion 2c, the lower end of the electrode handle 2 is formed with a second conical portion 2d, and the upper end of the electrode cap 3 is formed with a second conical hole 3b that is adapted to the second conical portion 2d. The taper fit allows the electrode connector 1, the electrode handle 2 and the electrode cap 3 to be connected as one unit. The second annular groove 2b is formed between the first conical portion 2c and the second conical portion 2d. In this embodiment, the second annular groove 2b is preferably formed in a position close to the first conical portion 2c. At this time, after the second reinforcing sleeve 7 is threaded onto the electrode connector 1, the upper end of the second retaining spring 6 can be close to the bottom of the electrode connector 1. This design can prevent the electrode handle 2 from moving downward and causing shaking.

[0030] In actual use, firstly, the electrode connector 1, electrode handle 2, and electrode cap 3 are assembled in a tapered fit. Then, the first retaining spring 4 is inserted into the first annular groove 3a, and the second retaining spring 6 is inserted into the second annular groove 2b. Next, the second reinforcing sleeve 7 is fitted upwards from the lower end of the electrode cap 3. The second reinforcing sleeve 7 is rotated to engage with the threaded connection of the electrode connector 1 until the second reinforcing sleeve 7 cannot be rotated. At this time, the lower end of the second retaining spring 6 is tightly against the second limiting plate 7a. The nut 8 is then rotated downwards and tightened to make it tightly together with the second reinforcing sleeve 7. Then, the first reinforcing sleeve 5 is fitted upwards from the lower end of the electrode cap 3. The first reinforcing sleeve 5 is rotated to engage with the threaded connection of the electrode handle 2 or sleeve 7c until the first reinforcing sleeve 5 cannot be rotated. At this time, the lower end of the first retaining spring 4 is tightly against the first limiting plate 5a. Finally, the nut 8 is rotated downwards and tightened to make it tightly together with the first reinforcing sleeve 5, thus completing the assembly of the spot weld joint that prevents the electrode cap from falling off.

[0031] The reinforcing sleeve assembled by threads and the snap ring mutually restrict each other, which can effectively prevent the electrode handle 2 and electrode cap 3 from falling off. The overall structure is very simple and low cost. After the reinforcing sleeve is installed, the original spot welded joint also increases the overall structural strength.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A spot welding head for preventing electrode cap detachment, comprising an electrode handle (2), wherein an electrode connector (1) and an electrode cap (3) are respectively connected to the upper and lower ends of the electrode handle (2), characterized in that: The electrode cap (3) is fitted with a first reinforcing sleeve (5) on its outer side. The first reinforcing sleeve (5) has an open upper end and a first limiting plate (5a) at its lower end. The first limiting plate (5a) has a first clearance hole (5a1) with the same cross-sectional size as the electrode cap (3). The inner surface of the upper end of the first reinforcing sleeve (5) has a first internal thread (5b). The lower end of the electrode handle (2) has a first external thread (2a) that matches the first internal thread (5b). The electrode cap (3) is fitted with a first retaining ring (4) that surrounds its circumferential surface. After the first reinforcing sleeve (5) is threadedly connected to the lower end of the electrode handle (2), the first retaining ring (4) can be supported on the first limiting plate (5a).

2. The spot weld joint for preventing electrode cap detachment according to claim 1, characterized in that: The electrode handle (2) is fitted with a second reinforcing sleeve (7) on the outside. The upper end of the second reinforcing sleeve (7) is open, and the lower end has a second limiting plate (7a). The second limiting plate (7a) is provided with a second clearance hole (7a1) with the same cross-sectional size as the electrode handle (2). The upper inner surface of the second reinforcing sleeve (7) is provided with a second internal thread (7b). The lower outer surface of the electrode connector (1) is provided with a second external thread (1a) that matches the second internal thread (7b). The electrode handle (2) is fitted with a second retaining ring (6) that surrounds its circumferential surface. After the second reinforcing sleeve (7) is threadedly connected to the electrode connector (1), the second retaining ring (6) can be supported on the second limiting plate (7a).

3. The spot weld joint for preventing electrode cap detachment according to claim 1, characterized in that: The electrode cap (3) has a first annular groove (3a) on its surface, and the first retaining ring (4) is fitted into the first annular groove (3a), with the outer ring of the first retaining ring (4) protruding beyond the outer surface of the electrode cap (3).

4. The spot weld joint for preventing electrode cap detachment according to claim 2, characterized in that: The electrode handle (2) has a second annular groove (2b) on its surface. The second snap ring (6) is fitted into the second annular groove (2b), and the outer ring of the second snap ring (6) protrudes beyond the outer surface of the electrode handle (2).

5. The spot weld joint for preventing electrode cap detachment according to claim 2, characterized in that: The lower end of the second limiting plate (7a) extends downward with a sleeve (7c), the inner diameter of the sleeve (7c) is the same as the cross-sectional size of the electrode handle (2), and the first external thread (2a) is provided on the outer surface of the lower end of the sleeve (7c).

6. The spot weld joint for preventing electrode cap detachment according to claim 2, characterized in that: Both the first external thread (2a) and the second external thread (1a) are threaded with tightening nuts (8).

7. The spot weld joint for preventing electrode cap detachment according to claim 4, characterized in that: The electrode handle (2) has a first tapered part (2c) at its upper end, the electrode connector (1) has a first tapered hole (1b) inside its lower end that is adapted to the first tapered part (2c), the electrode handle (2) has a second tapered part (2d) at its lower end, and the electrode cap (3) has a second tapered hole (3b) at its upper end that is adapted to the second tapered part (2d). The second annular groove (2b) is disposed in the area between the first conical portion (2c) and the second conical portion (2d).

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