Portable handheld spot welding machine

Abstract

The utility model relates to a portable handheld spot welding machine which comprises a shell, a circuit module and a power module are fixedly arranged in the shell, the power module is electrically connected with the circuit module, the circuit module is fixedly and electrically connected with two spot welding terminals, the two spot welding terminals are both fixedly and electrically connected with a spot welding rod, two spot welding holes are formed in the shell in a penetrating mode, and the two spot welding holes are communicated with the circuit module. The two spot welding rods penetrate through the two spot welding holes, when the spot welding machine carries out spot welding, current flows out of the power supply module to the circuit module and then directly flows into the spot welding rods through the spot welding terminals for spot welding, and therefore the process that the current flows through a copper wire is reduced, electric connection between a circuit board and a spot welding pen through the copper wire is improved, and the production efficiency is improved. The problem that the spot welding energy utilization rate is reduced due to the fact that the portability is bound to be influenced by the existence of an extended copper wire and the resistance value generated by the extended copper wire and the connection point of the extended copper wire and the output port can generate a considerable part of Joule heat in the spot welding process is solved. The spot welding device has the effect of improving the energy utilization rate of spot welding.

Description

Technical Field

[0001] This application relates to the field of spot welding machines, and more particularly to a portable handheld spot welding machine. Background Technology

[0002] With the rapid development of the new energy industry, the demand for lithium batteries is increasing day by day. Usually, single lithium batteries are connected in series and parallel through connecting pieces to form lithium battery packs to achieve higher voltage, current or capacity. This process requires the use of spot welding machines. However, traditional industrial spot welding machines usually have a workbench, are large in size and weight, and need to be connected to the mains power to be used, making them unsuitable for outdoor operation. Therefore, mobile spot welding machines with power lithium batteries as the energy core have emerged.

[0003] Existing mobile spot welding machines typically include a housing. Two spot welding holes are provided through one side of the upper front of the housing. Several indicator light holes are provided through the side of the housing away from the spot welding holes. Two adjustment holes are provided through the front of the housing at the same level as the indicator light holes. A cover plate is fixedly connected to the upper surface of the housing. A lithium battery is fixedly connected to the bottom inside the housing. An electrode connecting piece is provided at the upper end of the lithium battery. A circuit board is fixedly connected to the upper end of the electrode connecting piece. Two spot welding terminals are fixedly connected to the upper part of the circuit board. The spot welding terminals are electrically connected to two spot welding pens through copper wires.

[0004] Spot welding machines generally employ automatic and manual trigger modes. In automatic trigger mode, two welding pens are simultaneously brought into contact with the workpiece to be welded. The circuit board then detects a short circuit between the two output poles. After a certain delay is established upon detection of the short circuit, a spot welding operation is triggered. In manual trigger mode, once both welding pens have made contact with the workpiece, the welding operation is performed by pressing or stepping on the welding switch of the spot welding machine, allowing for manual control of the welding time.

[0005] Disadvantages of existing technology:

[0006] 1. The circuit board is electrically connected to the spot welding pen via copper wires. The presence of the extended copper wires will inevitably affect portability. Furthermore, the resistance generated by the extended copper wires and the connection point between the extended copper wires and the output port will generate a considerable amount of Joule heat during the spot welding process, which will reduce the energy utilization rate of spot welding.

[0007] 2. Existing mobile spot welding machines require two hands to hold a spot welding pen for operation, thus necessitating the use of foot-operated spot welding control switches. However, in pursuit of portability, existing spot welding machines generally omit the foot-operated switches, which are not easy to carry. Consequently, existing spot welding machines typically only have one welding mode that can be automatically triggered, making it difficult for them to meet various spot welding needs.

[0008] Regarding the aforementioned technologies, the existing technologies have at least the following drawbacks: the circuit board is electrically connected to the spot welding pen via copper wires. The presence of extended copper wires inevitably affects portability. Furthermore, the resistance generated by the extended copper wires and the connection point between the extended copper wires and the output port will generate a considerable amount of Joule heat during the spot welding process, thus reducing the energy utilization rate of spot welding. Utility Model Content

[0009] To improve the energy utilization rate of spot welding, this application provides a portable handheld spot welding machine.

[0010] The portable handheld spot welding machine provided in this application adopts the following technical solution:

[0011] A portable handheld spot welding machine includes a housing. A circuit module and a power module are fixedly installed inside the housing. The power module is electrically connected to the circuit module. The circuit module is fixedly and electrically connected to two spot welding terminals. Each of the two spot welding terminals is fixedly and electrically connected to a spot welding rod. The housing has two through-holes for spot welding, and the two spot welding rods pass through the two spot welding holes.

[0012] By adopting the above technical solution, when the spot welding machine needs to perform spot welding, the user holds the housing and moves the spot welding machine to the metal workpiece to be welded. Then, both spot welding rods contact the metal workpiece and apply appropriate pressure. The spot welding machine then starts to complete the spot welding operation. This allows the current to flow directly from the power module to the circuit module and then directly to the spot welding rods through the spot welding terminals during spot welding. This reduces the current flow through the copper wire and improves the problem of the circuit board being electrically connected to the spot welding pen via copper wire. The presence of the extended copper wire inevitably affects portability, and the resistance generated by the extended copper wire and the connection point between the extended copper wire and the output port generates a considerable amount of Joule heat during spot welding, reducing the energy utilization rate of spot welding. In addition, both spot welding rods are directly fixed in position relative to the housing, allowing the spot welding operation to be completed by holding the housing with one hand, making spot welding simpler and more convenient.

[0013] Optionally, the circuit module includes a side spot welding module, and a through side spot welding groove is provided on one side of the housing. A side spot welding key is slidably fitted into the side spot welding groove, and the side spot welding key abuts against the side spot welding module.

[0014] By adopting the above technical solution, when the spot welding mode of the spot welding machine needs to be changed from automatic trigger mode to manual trigger mode, the side spot welding button is pressed and held to change the spot welding mode from automatic trigger mode to manual trigger mode. When the spot welding machine is in manual trigger mode and spot welding is required, the side spot welding button is pressed lightly to complete a spot welding operation. Thus, the spot welding machine has two spot welding modes, namely manual trigger mode and automatic trigger mode, which makes the welding mode of the spot welding machine more diverse and more suitable for different spot welding needs, thus improving its usability.

[0015] Optionally, the circuit module further includes an adjustment module, wherein an adjustment hole is provided through one side of the bottom of the housing, and an adjustment key is slidably engaged with the adjustment hole, the adjustment key abutting against the adjustment module.

[0016] By adopting the above technical solution, when the spot welding strength of the spot welding machine needs to be adjusted, simply pressing the adjustment key will complete the adjustment of the spot welding strength of the spot welding machine, thus making the adjustment of the spot welding strength of the spot welding machine simpler and more convenient, and improving its usability.

[0017] Optionally, the spot welding rod has a threaded end near the spot welding terminal, and the spot welding terminal has a threaded hole. When the spot welding rod is fixed and electrically connected to the spot welding terminal, the spot welding rod passes through and is threaded into the threaded hole.

[0018] By adopting the above technical solution, when the spot welding machine needs to replace the spot welding rod, the spot welding rod is turned to disengage from the threaded connection with the spot welding terminal, thus completing the release of the fixed connection between the spot welding rod and the spot welding terminal. Then, the new spot welding rod is re-threaded to the spot welding terminal, thus completing the replacement of the spot welding terminal. This makes the replacement of the spot welding terminal simpler and more convenient, and improves usability.

[0019] Optionally, the spot welding terminal has through-hole connecting slots on both sides, the circuit module passes through and is snapped into the connecting slots, and the connecting slots abut against the circuit module on both sides respectively.

[0020] By adopting the above technical solution, the connection groove is designed so that when the spot welding terminal is connected to the circuit module, the connection groove is snapped and fixed to the circuit module, and the two sides of the connection groove abut against the two sides of the circuit module respectively. This makes the connection between the spot welding terminal and the circuit module more stable and improves usability.

[0021] Optionally, the housing is engraved with anti-slip textures on both sides for gripping.

[0022] Optionally, the circuit module includes an LED display module. The housing has a through-hole display slot, through which the LED display module passes and is snapped into the display slot. The LED display module includes a first display section, a second display section, and a third display section. The first display section is used to display the current spot welding mode of the spot welding machine, the second display section is used to display the spot welding gear of the spot welding machine, and the third display section is used to display the power level of the power module.

[0023] Optionally, a cover is connected to one end of the housing. When the cover is snapped and fixed to the housing, the cover covers the two spot-welded rods.

[0024] Optionally, a partition plate is fixedly provided inside the cover, and when the cover covers the two spot welding rods, the two spot welding rods are respectively located on both sides of the partition plate.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When the spot welding machine needs to perform spot welding, hold the housing and move the spot welding machine to the metal workpiece to be welded. Then, make both spot welding rods contact the metal workpiece and apply appropriate pressure. The spot welding machine then starts to complete the spot welding operation. During spot welding, the current flows from the power module to the circuit module and then directly into the spot welding rods through the spot welding terminals. This reduces the current flow through the copper wire and improves the electrical connection between the circuit board and the spot welding pen via copper wire. The presence of the extended copper wire inevitably affects portability, and the resistance generated by the extended copper wire and the connection point between the extended copper wire and the output port will generate a considerable amount of Joule heat during spot welding, reducing the energy utilization rate of spot welding. In addition, the two spot welding rods are directly fixed in position relative to the housing, so that the spot welding operation can be completed by holding the housing with one hand, making spot welding simpler and more convenient.

[0027] 2. When the spot welding machine needs to switch from automatic trigger mode to manual trigger mode, press and hold the side spot welding button to switch the spot welding mode from automatic trigger mode to manual trigger mode. When the spot welding machine is in manual trigger mode and spot welding is required, lightly press the side spot welding button to complete one spot welding operation. This gives the spot welding machine two spot welding modes, namely manual trigger mode and automatic trigger mode, thus enriching the welding modes of the spot welding machine and making it more suitable for different spot welding needs, thus improving its usability.

[0028] 3. When the spot welding machine needs to replace the spot welding rod, the spot welding rod is turned to disengage it from the threaded connection with the spot welding terminal, thus releasing the fixed connection between the spot welding rod and the spot welding terminal. Then, the new spot welding rod is re-threaded to the spot welding terminal, thus completing the replacement of the spot welding terminal. This makes the replacement of the spot welding terminal simpler and more convenient, and improves usability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the shell structure according to an embodiment of this application;

[0031] Figure 3 This is an exploded view of the shell structure of an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the first shell structure according to an embodiment of this application;

[0033] Figure 5 This is a schematic diagram of the power module structure according to an embodiment of this application;

[0034] Figure 6 This is a schematic diagram of the circuit module structure according to an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the LED display module structure according to an embodiment of this application;

[0036] Figure 8 This is a schematic diagram of the spot welding terminal structure according to an embodiment of this application;

[0037] Figure 9 This is a schematic diagram of the spot welding rod structure according to an embodiment of this application;

[0038] Figure 10 This is a cross-sectional view of the overall structure of an embodiment of this application;

[0039] Figure 11 yes Figure 10 Enlarged view of part A.

[0040] Explanation of reference numerals in the attached drawings: 1. Housing; 101. Side spot welding groove; 1011. Side spot welding key; 102. Adjustment hole; 1021. Adjustment key; 103. Display groove; 104. Charging groove; 105. Spot welding hole; 11. First housing part; 111. Sealing protrusion; 112. Snap-fit ​​protrusion; 12. Second housing part; 121. Sealing groove; 122. Snap-fit ​​groove; 13. Anti-slip texture; 14. Circuit module; 141. Side spot welding module; 142. Adjustment module; 143. LED display module; 1431. First display part; 1432. Second display part; 1433. Third display part; 144. Charging module; 145. Spot welding terminal; 1451. Connecting groove; 1452. Threaded hole; 146. Spot welding rod; 15. Power module; 2. Cover; 21. Divider plate. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail.

[0042] This application discloses a portable handheld spot welding machine. (Refer to...) Figure 1 and Figure 2 A portable handheld spot welding machine includes a housing 1 and a cover 2, with the cover 2 connected to the housing 1.

[0043] Reference Figure 3 and Figure 4 The housing 1 includes a first housing portion 11 and a second housing portion 12. A sealing protrusion 111 is fixedly provided on the side of the first housing portion 11 near the second housing portion 11. The sealing protrusion 111 extends along the edge of the first housing portion 11. A sealing groove 121 is provided on the side of the second housing portion 12 near the first housing portion 11. When the first housing portion 11 and the second housing portion 12 are connected, the sealing protrusion 111 passes through the sealing groove 121. A plurality of snap-fit ​​protrusions 112 are fixedly provided on the inner side of the first housing portion 11. A plurality of through snap-fit ​​grooves 122 are provided on the second housing portion 12. When the first housing portion 11 and the second housing portion 12 are fixed, each snap-fit ​​protrusion 112 passes through and snaps into each snap-fit ​​groove 122.

[0044] Reference Figure 3 and Figure 4 The shell 1 has an elliptical cross-section, and anti-slip textures 13 are engraved on both sides of the long axis of the shell 1 for gripping, making the shell 1 more convenient to hold.

[0045] Reference Figure 3 , Figure 5 and Figure 6 Inside the housing 1, a circuit module 14 and a power module 15 are fixedly installed by screws. The power module 15 is electrically connected to the circuit module 14 and provides power to the spot welding machine. In this embodiment, the power module 15 is a lithium battery.

[0046] Reference Figure 3 , Figure 5 and Figure 6 The circuit module 14 includes a side spot welding module 141. A through-hole side spot welding groove 101 is provided on one side of the long axis of the housing 1. A side spot welding key 1011 is slidably engaged with the side spot welding groove 101. The side spot welding key 1011 abuts against the side spot welding module 141. When the spot welding mode of the spot welding machine needs to be changed from automatic trigger mode to manual trigger mode, the side spot welding key 1011 is pressed and held to change the spot welding mode of the spot welding machine from automatic trigger mode to manual trigger mode. When the spot welding machine is in manual trigger mode and spot welding needs to be performed, the side spot welding key 1011 is pressed lightly to complete a spot welding operation. Thus, the spot welding machine has two spot welding modes, namely manual trigger mode and automatic trigger mode, which makes the welding mode of the spot welding machine more abundant and makes the spot welding machine more suitable for different spot welding needs.

[0047] Reference Figure 3 , Figure 5 and Figure 6 The circuit module 14 also includes an adjustment module 142. An adjustment hole 102 is provided through one side of the bottom of the housing 1. An adjustment key 1021 is slidably engaged with the adjustment hole 102. The adjustment key 1021 abuts against the adjustment module 142. When the spot welding intensity of the spot welding machine needs to be adjusted, pressing the adjustment key 1021 will complete the adjustment of the spot welding intensity of the spot welding machine, thus making the adjustment of the spot welding intensity of the spot welding machine simpler and more convenient.

[0048] Reference Figure 5 , Figure 6 as well as Figure 7 The circuit module 14 includes an LED display module 143. A through display slot 103 is provided on one side of the housing 1 in the short axis direction. The LED display module 143 passes through and is snapped into the display slot 103. The LED display module 143 includes a first display part 1431, a second display part 1432 and a third display part 1433. The first display part 1431 is used to display the spot welding mode of the spot welding machine at this time, the second display part 1432 is used to display the spot welding gear of the spot welding machine, and the third display part 1433 is used to display the power of the power module 15.

[0049] The first display unit 1431 includes two first display lights. In this embodiment, when one first display light is lit, it indicates that the spot welding machine is in automatic trigger mode. When both first display lights are lit at the same time, it indicates that the spot welding machine is in manual trigger mode.

[0050] The second display unit 1432 includes five second display lights. In this embodiment, the number of second display lights lit indicates the spot welding level of the spot welding machine. For example, when all five second display lights are lit, the spot welding machine is in the fifth spot welding level, which is the strongest spot welding level.

[0051] The third display unit 1433 includes three third display lights. In this embodiment, the number of third display lights lit indicates the approximate remaining power of the power module 15. For example, when two third display lights are lit, it indicates that the power module 15 has approximately two-thirds of its power remaining.

[0052] Reference Figure 3 , Figure 5 and Figure 6 The circuit module 14 also includes a charging module 144, which is fixed and electrically connected to the circuit module 14. A charging slot 104 is provided on one side of the bottom of the housing 1, through which the charging module 144 passes and is snapped into the charging slot 104. The charging module 144 is used to charge the power module 15.

[0053] The circuit module also includes a lithium battery protection module, a buzzer module, a battery power detection module, a temperature detection module, a boost module, a buck regulator module, an output power control module, a spot welding trigger detection module, and a microcontroller module. (Diagrams of all the above modules are not shown.)

[0054] Reference Figure 6 , Figure 8 as well as Figure 9 The circuit module 14 is fixed and electrically connected to two spot welding terminals 145. The spot welding terminals 145 have through-hole connecting grooves 1451 on both sides. The circuit module 14 passes through and is snapped into the connecting grooves 1451. The connecting grooves 1451 abut against the circuit module 14 on both sides, so that when the spot welding terminals 145 are connected to the circuit module 14, the connecting grooves 1451 are snapped into the circuit module 14 and the connecting grooves 1451 abut against the circuit module 14 on both sides, thereby further stabilizing the connection between the spot welding terminals 145 and the circuit module 14.

[0055] Reference Figure 6 , Figure 8 as well as Figure 9Two spot welding terminals 145 are each connected to a spot welding rod 146 on the side away from the circuit module 14. The end of the spot welding rod 146 near the spot welding terminal 145 is threaded. The spot welding terminal 145 has a threaded hole 1452. When the spot welding rod 146 is fixed and electrically connected to the spot welding terminal 145, the spot welding rod 146 passes through and is threaded into the threaded hole 1452. Two through-holes 105 are provided on one side of the top of the housing 1, and the two spot welding rods 146 pass through the two spot welding holes 105. In this embodiment, the two... Both the spot welding terminal 145 and the two spot welding rods 146 are made of copper. When the spot welding machine needs to replace the spot welding rod 146, the spot welding rod 146 is unscrewed from the spot welding terminal 145 by turning the spot welding rod 146, thus releasing the fixed connection between the spot welding rod 146 and the spot welding terminal 145. Then, the new spot welding rod 146 is re-threaded to the spot welding terminal 145, thus completing the replacement of the spot welding terminal 145, making the replacement of the spot welding terminal 145 simpler and more convenient.

[0056] Reference Figure 10 and Figure 11 When the cover 2 is snapped and fixed to the housing 1, the cover 2 covers the two spot welding rods 146, thus protecting the two spot welding rods 146 when the spot welding machine is not in use, thereby extending the service life of the two spot welding rods 146. A partition plate 21 is fixedly installed inside the cover 2. When the cover 2 covers the two spot welding rods 146, the two spot welding rods 146 are located on both sides of the partition plate 21, thus preventing the two spot welding rods 146 from coming into contact with each other when the spot welding machine is not in use, avoiding potential safety hazards to the spot welding machine.

[0057] The implementation principle of a portable handheld spot welding machine according to an embodiment of this application is as follows: When the spot welding machine needs to perform spot welding, the handheld housing 1 is used to move the spot welding machine to the metal workpiece to be welded. Then, both spot welding rods 146 are brought into contact with the metal workpiece and appropriate pressure is applied to the metal workpiece. Subsequently, the spot welding machine starts to complete the spot welding operation. Thus, when the spot welding machine performs spot welding, the current flows from the power module 15 to the circuit module 14, and then directly flows into the spot welding rods 146 through the spot welding terminal 145 for spot welding. This reduces the process of current flowing through the copper wire, improving the electrical connection between the circuit board and the spot welding pen through the copper wire, because there is an extension of the copper wire. This addresses the issue of reduced energy utilization due to the inherent limitations of the extended copper wire and the resistance generated at the connection point between the extended copper wire and the output port, which would inevitably affect portability. Furthermore, the two welding rods 146 are directly fixed to the position of the housing 1, allowing the welding machine to perform spot welding operations by holding the housing 1 with one hand, making spot welding simpler and more convenient. The one-handed operation of the welding machine also provides two operating modes, and the addition of a manual trigger welding switch on the side solves the problem of existing mobile welding machines lacking manual triggering, greatly improving operability.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A portable handheld spot welding machine, characterized in that: The device includes a housing (1), inside which a circuit module (14) and a power module (15) are fixedly installed. The power module (15) is electrically connected to the circuit module (14). The circuit module (14) is fixedly and electrically connected to two spot welding terminals (145). Both spot welding terminals (145) are fixedly and electrically connected to spot welding rods (146). The housing (1) has two through-holes (105), through which the two spot welding rods (146) pass.

2. The portable handheld spot welding machine according to claim 1, characterized in that: The circuit module (14) includes a side spot welding module (141). A through side spot welding groove (101) is provided on one side of the housing (1). A side spot welding key (1011) is slidably fitted in the side spot welding groove (1011). The side spot welding key (1011) abuts against the side spot welding module (141).

3. A portable handheld spot welding machine according to claim 2, characterized in that: The circuit module (14) also includes an adjustment module (142). An adjustment hole (102) is provided through one side of the bottom of the housing (1). An adjustment key (1021) is slidably engaged with the adjustment hole (102). The adjustment key (1021) abuts against the adjustment module (142).

4. A portable handheld spot welding machine according to claim 1, characterized in that: The spot welding rod (146) has a thread engraved at one end near the spot welding terminal (145), and the spot welding terminal (145) has a threaded hole (1452). When the spot welding rod (146) is fixed and electrically connected to the spot welding terminal (145), the spot welding rod (146) passes through and is threaded into the threaded hole (1452).

5. A portable handheld spot welding machine according to claim 1, characterized in that: The spot welding terminal (145) has through-hole connecting grooves (1451) on both sides. The circuit module (14) passes through and is fixed in the connecting grooves (1451). The connecting grooves (1451) abut against the circuit module (14) on both sides respectively.

6. A portable handheld spot welding machine according to claim 1, characterized in that: The shell (1) has anti-slip textures (13) engraved on both sides for gripping.

7. A portable handheld spot welding machine according to claim 1, characterized in that: The circuit module (14) includes an LED display module (143). The housing (1) has a through-hole display slot (103). The LED display module (143) passes through and is snapped into the display slot (103). The LED display module (143) includes a first display part (1431), a second display part (1432), and a third display part (1433). The first display part (1431) is used to display the spot welding mode of the spot welding machine at this time. The second display part (1432) is used to display the spot welding gear of the spot welding machine. The third display part (1433) is used to display the power of the power module (15).

8. A portable handheld spot welding machine according to claim 1, characterized in that: One end of the housing (1) is connected to a cover (2). When the cover (2) is snapped and fixed to the housing (1), the cover (2) covers the two spot-welded rods (146).

9. A portable handheld spot welding machine according to claim 8, characterized in that: The cover (2) is fixedly provided with a partition plate (21). When the cover (2) covers the two spot welding rods (146), the two spot welding rods (146) are located on both sides of the partition plate (21).

Images