A laser welding machine and process for welding an electric toothbrush motor

Abstract

The present invention belongs to the technical field of the production process of electric toothbrushes, and particularly relates to a laser welding machine and process for welding an electric toothbrush motor, which comprises a welding table, a driving guide rail, and a sliding sleeve that are slidably matched, the sliding sleeve, a plastic fixing plate, a circuit board, and a motor body; a gantry and a welding assembly are installed on the welding table, the welding assembly includes a welding machine and a welding needle, an isolation sleeve is fixedly installed at the bottom of the welding machine, the welding needle is located inside the isolation sleeve, a rubber telescopic cylinder is installed at the bottom of the isolation sleeve, and air holes are formed at the top of the isolation sleeve. During the rotation of the guide rod of the present invention, the pressing block on the guide rod presses the rubber telescopic cylinder, and the gas inside the rubber telescopic cylinder is discharged from the air holes at the top of the isolation sleeve through the bottom of the isolation sleeve. After the welding heat is discharged from the air holes at the top of the isolation sleeve, it can effectively prevent the discharged heat from contacting the devices around the power welding head and affecting the devices.

Description

Technical Field

[0001] The present invention belongs to the technical field of the production process of electric toothbrushes, and particularly relates to a laser welding machine and process for welding an electric toothbrush motor. Background Art

[0002] An electric toothbrush is a toothbrush that makes the brush head generate high-frequency vibration through the rapid rotation or vibration of a motor core, thereby realizing the cleaning of teeth. An electric toothbrush mainly consists of multiple components such as a plastic shell, a motor, a circuit board, a plastic fixing plate, and a battery. The production process of an electric toothbrush is as follows: First, the motor, battery, and circuit board are installed on the plastic fixing plate, then the battery and the motor are connected to the circuit board through a wire harness, and finally the plastic fixing plate is inserted into the plastic shell to complete the installation of the electric control components of the electric toothbrush.

[0003] During the welding process of the motor circuit and the power supply welding head of the circuit board, the high temperature generated by the welding machine easily melts the components near the power supply welding head. Usually, an isolation device is used to isolate the welding needle to avoid the conduction of welding heat to the components near the power supply welding head. However, although the isolation device can isolate the welding needle, the welding heat will also accumulate in the isolation device, resulting in slow cooling of the welding part and poor welding efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser welding machine and process for welding an electric toothbrush motor in view of the deficiencies of the prior art.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A laser welding machine for welding an electric toothbrush motor, which includes a welding table. A driving guide rail is installed on the welding table, and the driving guide rail is slidably matched with a sliding sleeve. The motor body, the plastic fixing plate, and the circuit board are respectively placed on the sliding sleeve. The motor body and the circuit board are respectively installed on both sides of the plastic fixing plate, and the motor body is connected to the circuit board; A gantry is installed on the welding table, and a welding assembly is installed on the gantry. The welding assembly includes a welding machine and a welding needle on the welding machine. An isolation sleeve is fixedly installed at the bottom of the welding machine, the welding needle is located inside the isolation sleeve, a rubber telescopic cylinder is installed at the bottom of the isolation sleeve, air holes are opened at the top of the isolation sleeve, and the air outlet of the rubber telescopic cylinder faces the inside of the isolation sleeve. By pressing the rubber telescopic cylinder, the gas at the bottom of the isolation sleeve is accelerated to be discharged through the air holes at the top of the isolation sleeve.

[0006] As a further optimization or improvement of this solution, a rotating sleeve is installed on the isolation sleeve, a spiral groove is opened on the isolation sleeve, a slider is installed inside the rotating sleeve, and the slider is slidably matched with the spiral groove; A cylinder is fixedly installed on the isolation sleeve, the output end of the cylinder is connected to a push block, and the push block is rotatably matched with the rotating sleeve.

[0007] As a further optimization or improvement of this solution, an annular groove is opened on the rotating sleeve, and the push block is slidably matched with the annular groove.

[0008] As a further optimization or improvement of this solution, a liftable guide rod is installed at the bottom of the rotating sleeve, and a pressing block is fixedly installed on the guide rod. The pressing block presses the rubber telescopic cylinder. When the cylinder is started, the cylinder drives the push block and the rotating sleeve to move downward. The rotating sleeve rotates downward in a spiral manner in cooperation with the slider and the spiral groove.

[0009] As a further optimization or improvement of this solution, a return spring is installed inside the rotating sleeve, and the return spring is connected to the guide rod.

[0010] As a further optimization or improvement of this solution, the circuit board includes a power supply welding head and a wire storage groove installed near the power supply welding head. A baffle is installed at the top of the wire storage groove, and a clamping block is installed on the side wall of the wire storage groove. The guide rod is slidably matched with the wire storage groove. A wire passing hole is opened on the plastic fixing plate, and the wire of the motor body passes through the wire passing hole and is placed on the power supply welding head. A pressing pad is installed at the bottom of the isolation sleeve, and the pressing pad presses the wire of the motor body.

[0011] As a further optimization or improvement of this solution, a material box is installed at the bottom of the push block, and several buckles are installed inside the material box. The buckles are clamped with the clamping blocks on the wire storage groove; the cylinder penetrates the push block to press the buckles inside the material box, and clamps the buckles with the clamping blocks on the wire storage groove.

[0012] A laser welding process for welding an electric toothbrush motor, which is applied to the laser welding machine for welding an electric toothbrush motor as described above. The method includes the following steps:

[0013] Step S1: Fix the motor body and the circuit board at both ends of the plastic fixing plate respectively, reduce the influence of the working vibration of the motor body on the circuit board, and at the same time, the power supply wire of the motor body passes through the wire passing hole and is placed on the power supply welding head. Place the assembled motor body and circuit board into the sliding sleeve, and the driving guide rail transports the sliding sleeve to the bottom of the welding assembly;

[0014] Step S2: Start the welding assembly. The welding assembly drives the isolation sleeve to move downward, sleeved the isolation sleeve on the power supply welding head, isolates the power supply welding head from the nearby devices through the isolation sleeve. At the same time, the pressing pad at the bottom of the isolation sleeve presses the power supply wire of the motor body;

[0015] Step S3: When the welding assembly welds the power supply welding head and the power supply wire of the motor body, the isolation sleeve isolates the welding heat inside the isolation sleeve, so that the heat accumulated inside the isolation sleeve accelerates the melting of the solder joints on the power supply welding head;

[0016] Step S4: During the welding process, the cylinder is started. The cylinder pushes the push block to move downward. Under the sliding cooperation of the slider and the spiral groove, the rotating sleeve rotates downward in a spiral manner. The guide rod retracts into the rotating sleeve and presses the return spring. At the same time, the rotating sleeve drives the guide rod to rotate;

[0017] Step S5: During the rotation of the guide rod, the pressing block on the guide rod presses the rubber telescopic cylinder, discharging the gas inside the rubber telescopic cylinder from the bottom of the isolation sleeve through the air holes at the top of the isolation sleeve, and the welding heat is discharged from the air holes at the top of the isolation sleeve.

[0018] As a further optimization or improvement of this solution, step S4 specifically includes the following steps:

[0019] Step S41: During the rotation of the guide rod, the guide rod drives the redundant power supply lines of the motor body to be pushed into the storage wire groove, introducing the redundant power supply lines into the interior of the storage wire groove;

[0020] Step S42: As the air cylinder drives the push block to move downward, the material box at the bottom of the push block moves downward accordingly. When the material box contacts the storage wire groove, the air cylinder pushes the buckle inside the material box downward, causing the buckle to engage with the latch on the storage wire groove, fixing the redundant power supply lines inside the storage wire groove.

[0021] Advantages of the present invention:

[0022] (1) In the present invention, the welding assembly drives the isolation sleeve to move downward, sleeving the isolation sleeve on the power supply welding head. The isolation sleeve isolates the power supply welding head from the nearby devices. At the same time, the gasket at the bottom of the isolation sleeve presses the power supply lines of the motor body. When the welding assembly welds the power supply welding head and the power supply lines of the motor body, the isolation sleeve isolates the welding heat inside the isolation sleeve, causing the heat accumulated inside the isolation sleeve to accelerate the melting of the solder joints on the power supply welding head, improving the welding efficiency, and at the same time avoiding the influence of the welding heat on the devices near the power supply welding head.

[0023] (2) During the welding process, the air cylinder pushes the push block downward. Under the sliding fit of the slider and the spiral groove, the rotating sleeve rotates downward in a spiral manner, the guide rod retracts into the rotating sleeve and presses the return spring. At the same time, the rotating sleeve drives the guide rod to rotate, and the guide rod drives the redundant power supply lines of the motor body to be pushed into the storage wire groove, introducing the redundant power supply lines into the interior of the storage wire groove, tightening the loose power supply lines, and avoiding abrasion between the power supply lines and the plastic housing during the assembly of the electric toothbrush.

[0024] (3) During the rotation of the guide rod of the present invention, the pressing block on the guide rod presses the rubber telescopic cylinder, discharging the gas inside the rubber telescopic cylinder from the bottom of the isolation sleeve through the air holes at the top of the isolation sleeve. After the welding heat is discharged from the air holes at the top of the isolation sleeve, it can effectively prevent the discharged heat from contacting the devices around the power supply welding head and affecting the devices. The present invention accelerates the gas flow at the welding part by pressing the rubber telescopic cylinder, improving the welding efficiency. Description of the drawings

[0025] The following further illustrates the present invention with reference to the drawings.

[0026] Figure 1Schematic diagram of the overall structure of the present invention.

[0027] Figure 2 Front view of the overall structure of the present invention.

[0028] Figure 3 Schematic diagram of the connection structure between the plastic fixing plate, the circuit board and the motor body.

[0029] Figure 4 is Figure 3 Enlarged view of the structure of part A of

[0030] Figure 5 Schematic diagram of the welding assembly structure.

[0031] Figure 6 Schematic diagram of the connection structure between the electric welding machine and the isolation sleeve.

[0032] Figure 7 Exploded view of the overall structure of the welding assembly.

[0033] Figure 8 Cross-sectional view of the overall structure of the welding assembly.

[0034] Figure 9 is Figure 8 Enlarged view of the structure of part B of

[0035] Figure 10 Schematic diagram of the internal structure of the material box.

[0036] In the figure, the markings are: 1. Welding table; 2. Gantry; 3. Driving guide rail; 4. Sliding sleeve; 5. Motor body; 6. Welding assembly; 601. Electric welding machine; 602. Welding needle; 603. Isolation sleeve; 604. Air hole; 605. Spiral groove; 606. Rubber telescopic cylinder; 607. Cylinder; 608. Pusher block; 609. Material box; 610. Rotating sleeve; 611. Guide rod; 612. Return spring; 613. Pressing block; 614. Pressing pad; 615. Slide block; 616. Ring groove; 617. Buckle; 7. Plastic fixing plate; 8. Circuit board; 801. Power supply welding head; 802. Cable storage groove; 803. Block; 804. Baffle; 9. Wire passing hole. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] See Figures 1-9, A laser welding machine for welding an electric toothbrush motor, which includes a welding table 1. A driving guide rail 3 is installed on the welding table 1. The driving guide rail 3 is slidably matched with a sliding sleeve 4. An electric motor body 5, a plastic fixing plate 7 and a circuit board 8 are respectively placed on the sliding sleeve 4. The electric motor body 5 and the circuit board 8 are respectively installed on both sides of the plastic fixing plate 7, and the electric motor body 5 is connected to the circuit board 8; A gantry 2 is installed on the welding table 1, and a welding assembly 6 is installed on the gantry 2. The welding assembly 6 includes a welding machine 601 and a welding needle 602 on the welding machine 601. An isolation sleeve 603 is fixedly installed at the bottom of the welding machine 601. The welding needle 602 is located inside the isolation sleeve 603. A rubber telescopic cylinder 606 is installed at the bottom of the isolation sleeve 603. An air hole 604 is opened at the top of the isolation sleeve 603. The air outlet of the rubber telescopic cylinder 606 faces the inside of the isolation sleeve 603. By pressing the rubber telescopic cylinder 606, the gas at the bottom of the isolation sleeve 603 is accelerated to be discharged through the air hole 604 at the top of the isolation sleeve 603.

[0039] Specifically, a rotating sleeve 610 is installed on the isolation sleeve 603. A spiral groove 605 is opened on the isolation sleeve 603. A slider 615 is installed inside the rotating sleeve 610. The slider 615 is slidably matched with the spiral groove 605; A cylinder 607 is fixedly installed on the isolation sleeve 603. The output end of the cylinder 607 is connected to a push block 608. The push block 608 is rotatably matched with the rotating sleeve 610.

[0040] Specifically, a ring groove 616 is opened on the rotating sleeve 610. The push block 608 is slidably matched with the ring groove 616.

[0041] Specifically, a liftable guide rod 611 is installed at the bottom of the rotating sleeve 610. A pressing block 613 is fixedly installed on the guide rod 611. The pressing block 613 presses the rubber telescopic cylinder 606; When the cylinder 607 is started, the cylinder 607 drives the push block 608 and the rotating sleeve 610 to move downward. The rotating sleeve 610 rotates downward in a spiral manner under the cooperation of the slider 615 and the spiral groove 605.

[0042] Specifically, a return spring 612 is installed inside the rotating sleeve 610. The return spring 612 is connected to the guide rod 611.

[0043] The assembly process of the electric toothbrush is as follows; First, the electric motor body 5 and the circuit board 8 are respectively fixed at both ends of the plastic fixing plate 7. The plastic fixing plate 7 separates the electric motor body 5 and the circuit board 8, reducing the influence of the working vibration of the electric motor body 5 on the circuit board 8. At the same time, the power line of the electric motor body 5 passes through the wire passing hole 9 and is placed on the power welding head 801. This operation can be completed by a robotic arm. The assembled electric motor body 5 and circuit board 8 are placed on the sliding sleeve 4. Since the driving guide rail 3 transports the sliding sleeve 4 to the bottom of the welding assembly 6.

[0044] During welding, the welding assembly 6 is started. The welding assembly 6 drives the isolation sleeve 603 to move downward, sleeving the isolation sleeve 603 on the power supply welding head 801. The power supply welding head 801 is isolated from nearby devices through the isolation sleeve 603. At the same time, the pressing pad 614 at the bottom of the isolation sleeve 603 presses the power supply line of the motor body 5.

[0045] When the welding assembly 6 welds the power supply welding head 801 and the power supply line of the motor body 5, the isolation sleeve 603 isolates the welding heat inside the isolation sleeve 603, causing the heat accumulated inside the isolation sleeve 603 to accelerate the melting of the solder joints on the power supply welding head 801, improving the welding efficiency. At the same time, it avoids the influence of the welding heat on the devices near the power supply welding head 801.

[0046] During actual use, the reserved length of the power supply line of the motor body 5 is generally relatively long, which facilitates the welding of the power supply line to the power supply welding head 801. However, after welding, the power supply line is in a loose state. During the assembly of the electric toothbrush, the motor body 5 and the circuit board 8 fixed on the plastic fixing plate 7 need to be inserted into the plastic housing together. During this process, the loose power supply line of the motor body 5 is very likely to be caught by the plastic housing, resulting in welding failure.

[0047] During the welding process, the air cylinder 607 is started. The air cylinder 607 pushes the push block 608 to move downward. Under the sliding fit of the slider 615 and the spiral groove 605, the rotating sleeve 610 rotates downward in a spiral manner. The guide rod 611 retracts into the rotating sleeve 610 and presses the return spring 612. At the same time, the rotating sleeve 610 drives the guide rod 611 to rotate. The guide rod 611 drives the excess power supply line of the motor body 5 to be pushed into the storage groove 802, introducing the excess power supply line into the storage groove 802, tightening the loose power supply line, and avoiding abrasion between the power supply line and the plastic housing during the assembly of the electric toothbrush. At the same time, during this process, since the pressing pad 614 presses the power supply line at the welding end, under the action of the pressing pad 614, it is avoided that the movement of the guide rod 611 interferes with the power supply line at the welding end.

[0048] Specifically, during the rotation of the guide rod 611, the pressing block 613 on the guide rod 611 presses the rubber telescopic cylinder 606, discharging the gas inside the rubber telescopic cylinder 606 from the bottom of the isolation sleeve 603 through the air holes 604 at the top of the isolation sleeve 603, accelerating the dissipation of the welding heat inside the isolation sleeve 603. After the welding heat is discharged from the air holes 604 at the top of the isolation sleeve 603, it can effectively prevent the discharged heat from contacting the devices around the power supply welding head 801 and affecting the devices.

[0049] It should be noted that the air holes 604 are arranged at intervals, and the air cylinder 607 is installed at the intervals of the air holes 604. Therefore, the heat discharged from the air holes 604 will not affect the air cylinder 607.

[0050] See Figures 3-10 As shown, the circuit board 8 includes a power supply solder head 801 and a wire storage groove 802 installed near the power supply solder head 801. A baffle 804 is installed at the top of the wire storage groove 802, and a clamping block 803 is installed on the side wall of the wire storage groove 802. The guide rod 611 is slidably engaged with the wire storage groove 802. A wire passing hole 9 is formed in the plastic fixing plate 7, and the wire of the motor body 5 passes through the wire passing hole 9 and is placed on the power supply solder head 801. A pressing pad 614 is installed at the bottom of the isolation sleeve 603, and the pressing pad 614 presses the wire of the motor body 5.

[0051] Specifically, a material box 609 is installed at the bottom of the push block 608, and a number of buckles 617 are installed in the material box 609. The buckles 617 are clamped with the clamping blocks 803 on the wire storage groove 802; the air cylinder 607 penetrates through the push block 608 to press the buckles 617 inside the material box 609, and clamps the buckles 617 with the clamping blocks 803 on the wire storage groove 802.

[0052] It should be noted that, see Figure 4 Figure 4 , after the guide rod 611 introduces the redundant power supply wire of the motor body 5 into the wire storage groove 802, the air cylinder 607 drives the guide rod 611 to reset, so that the guide rod 611 disengages from the wire storage groove 802. At this time, the redundant power supply wire is blocked inside the wire storage groove 802 by the baffle 804 at the top of the wire storage groove 802. In order to prevent the power supply wire of the motor body 5 from disengaging from the wire storage groove 802 during the assembly process.

[0053] During the welding process, the air cylinder 607 is started, and the air cylinder 607 pushes the push block 608 to move downward. Under the sliding cooperation of the slider 615 and the spiral groove 605, the rotating sleeve 610 rotates downward in a spiral manner. At the same time, the rotating sleeve 610 drives the guide rod 611 to rotate, and the guide rod 611 drives the redundant power supply wire of the motor body 5 to be pushed into the wire storage groove 802, introducing the redundant power supply wire into the wire storage groove 802. At the same time, as the air cylinder 607 drives the push block 608 to move downward, the material box 609 at the bottom of the push block 608 moves downward accordingly. When the material box 609 contacts the wire storage groove 802, see Figure 10 Figure 10 , the air cylinder 607 pushes the buckles 617 inside the material box 609 downward, so that the buckles 617 are clamped with the clamping blocks 803 on the wire storage groove 802, fixing the redundant power supply wire in the wire storage groove 802 and preventing the wire from disengaging from the wire storage groove 802.

[0054] Please refer to Figures 1-9 As shown, the present invention is a laser welding process for welding an electric toothbrush motor. The process is applied to the laser welding machine for welding an electric toothbrush motor as described in the above embodiment. The method includes the following steps:

[0055] Step S1: Fix the motor body 5 and the circuit board 8 at both ends of the plastic fixing plate 7 respectively to reduce the impact of the vibration of the motor body 5 during operation on the circuit board 8. At the same time, the power line of the motor body 5 passes through the wire passing hole 9 and is placed on the power solder head 801. Place the assembled motor body 5 and circuit board 8 into the sliding sleeve 4, and the driving guide rail 3 transports the sliding sleeve 4 to the bottom of the welding assembly 6;

[0056] Step S2: Start the welding assembly 6. The welding assembly 6 drives the isolation sleeve 603 to move downward, sleeving the isolation sleeve 603 on the power solder head 801 to isolate the power solder head 801 from the nearby devices through the isolation sleeve 603. At the same time, the pressure pad 614 at the bottom of the isolation sleeve 603 presses the power line of the motor body 5;

[0057] Step S3: When the welding assembly 6 welds the power solder head 801 and the power line of the motor body 5, the isolation sleeve 603 isolates the welding heat inside the isolation sleeve 603, so that the heat accumulated inside the isolation sleeve 603 accelerates the melting of the solder joints on the power solder head 801;

[0058] Step S4: During the welding process, the air cylinder 607 is started. The air cylinder 607 pushes the push block 608 to move downward. Under the sliding fit of the slider 615 and the spiral groove 605, the rotating sleeve 610 rotates downward in a spiral manner, and the guide rod 611 retracts into the rotating sleeve 610 and presses the return spring 612. At the same time, the rotating sleeve 610 drives the guide rod 611 to rotate;

[0059] Step S5: During the rotation of the guide rod 611, the pressing block 613 on the guide rod 611 presses the rubber telescopic cylinder 606, and the gas inside the rubber telescopic cylinder 606 is discharged from the bottom of the isolation sleeve 603 through the air hole 604 at the top of the isolation sleeve 603, accelerating the dissipation of the welding heat inside the isolation sleeve 603, and the welding heat is discharged from the air hole 604 at the top of the isolation sleeve 603.

[0060] As Figures 2-10 shown, as a preferred embodiment of the present invention, step S4 specifically includes the following steps:

[0061] Step S41: During the rotation of the guide rod 611, the guide rod 611 drives the redundant power line of the motor body 5 to be pushed into the storage groove 802, and the redundant power line is introduced into the storage groove 802;

[0062] Step S42: As the air cylinder 607 drives the push block 608 to move downward, the cartridge 609 at the bottom of the push block 608 moves downward accordingly. When the cartridge 609 contacts the storage groove 802, the air cylinder 607 pushes the buckle 617 inside the cartridge 609 downward, so that the buckle 617 is engaged with the block 803 on the storage groove 802, and the redundant power line is fixed inside the storage groove 802.

[0063] The implementation principle of the present invention is as follows:

[0064] Before use, first fix the motor body 5 and the circuit board 8 at both ends of the plastic fixing plate 7 respectively. The plastic fixing plate 7 separates the motor body 5 and the circuit board 8, reducing the impact of the working vibration of the motor body 5 on the circuit board 8. At the same time, the power line of the motor body 5 passes through the wire passing hole 9 and is placed on the power solder head 801. Place the assembled motor body 5 and circuit board 8 into the sliding sleeve 4, and the driving guide rail 3 transports the sliding sleeve 4 to the bottom of the welding assembly 6.

[0065] During use, start the welding assembly 6. The welding assembly 6 drives the isolation sleeve 603 to move downward, sleeving the isolation sleeve 603 on the power solder head 801, isolating the power solder head 801 from nearby components through the isolation sleeve 603. At the same time, the pressure pad 614 at the bottom of the isolation sleeve 603 presses the power line of the motor body 5.

[0066] When the welding assembly 6 welds the power solder head 801 and the power line of the motor body 5, the isolation sleeve 603 isolates the welding heat inside the isolation sleeve 603, causing the heat accumulated inside the isolation sleeve 603 to accelerate the melting of the solder joints on the power solder head 801, improving the welding efficiency, and at the same time avoiding the impact of the welding heat on the components near the power solder head 801.

[0067] In actual use, the reserved length of the power line of the motor body 5 is generally relatively long, which is convenient for welding the power line to the power solder head 801. However, after welding, the power line is in a loose state. During the assembly of the electric toothbrush, it is necessary to insert the motor body 5 and the circuit board 8 fixed on the plastic fixing plate 7 into the plastic shell together. During this process, the loose power line of the motor body 5 is very likely to be hung up by the plastic shell, resulting in welding failure.

[0068] During the welding process, the air cylinder 607 is started. The air cylinder 607 pushes the push block 608 to move downward. Under the sliding fit of the slider 615 and the spiral groove 605, the rotating sleeve 610 rotates downward in a spiral manner, and the guide rod 611 retracts into the rotating sleeve 610 and presses the return spring 612. At the same time, the rotating sleeve 610 drives the guide rod 611 to rotate, and the guide rod 611 drives the redundant power line of the motor body 5 to be pushed into the storage groove 802, introducing the redundant power line into the storage groove 802, tightening the loose power line, avoiding the rubbing of the power line against the plastic shell during the assembly of the electric toothbrush. At the same time, during this process, since the pressure pad 614 presses the power line at the welding end, under the action of the pressure pad 614, it is avoided that the movement of the guide rod 611 interferes with the power line at the welding end.

[0069] Specifically, during the rotation of the guide rod 611, the pressing block 613 on the guide rod 611 presses the rubber telescopic cylinder 606, and the gas inside the rubber telescopic cylinder 606 is discharged from the bottom of the isolation sleeve 603 through the air hole 604 at the top of the isolation sleeve 603, accelerating the dissipation of the welding heat inside the isolation sleeve 603. After the welding heat is discharged from the air hole 604 at the top of the isolation sleeve 603, it can effectively prevent the discharged heat from contacting the devices around the power supply welding head 801 and affecting the devices.

[0070] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A laser welding machine for welding an electric toothbrush motor, characterized in that: It includes a soldering table (1), on which a driving guide rail (3) is installed. The driving guide rail (3) is slidably matched with a sliding sleeve (4). An electric motor body (5), a plastic fixing plate (7) and a circuit board (8) are respectively placed on the sliding sleeve (4). The electric motor body (5) and the circuit board (8) are respectively installed on both sides of the plastic fixing plate (7), and the electric motor body (5) is connected to the circuit board (8). A gantry (2) is installed on the soldering table (1), and a welding assembly (6) is installed on the gantry (2). The welding assembly (6) includes an electric welding machine (601) and a welding needle (602) on the electric welding machine (601). An isolation sleeve (603) is fixedly installed at the bottom of the electric welding machine (601). The welding needle (602) is located inside the isolation sleeve (603). A rubber telescopic cylinder (606) is installed at the bottom of the isolation sleeve (603). An air hole (604) is opened at the top of the isolation sleeve (603). The air outlet of the rubber telescopic cylinder (606) faces the inside of the isolation sleeve (603). By pressing the rubber telescopic cylinder (606), the gas at the bottom of the isolation sleeve (603) is accelerated to be discharged through the air hole (604) at the top of the isolation sleeve (603). A rotating sleeve (610) is installed on the isolation sleeve (603). A spiral groove (605) is opened on the isolation sleeve (603). A slider (615) is installed inside the rotating sleeve (610). The slider (615) is slidably matched with the spiral groove (605). A cylinder (607) is fixedly installed on the isolation sleeve (603). The output end of the cylinder (607) is connected to a push block (608). The push block (608) is rotatably matched with the rotating sleeve (610). An annular groove (616) is opened on the rotating sleeve (610). The push block (608) is slidably matched with the annular groove (616). A liftable guide rod (611) is installed at the bottom of the rotating sleeve (610). A pressing block (613) is fixedly installed on the guide rod (611). The pressing block (613) presses the rubber telescopic cylinder (606). When the cylinder (607) is started, the cylinder (607) drives the push block (608) and the rotating sleeve (610) to move downward. The rotating sleeve (610) rotates downward in a spiral manner under the cooperation of the slider (615) and the spiral groove (605). A return spring (612) is installed inside the rotating sleeve (610). The return spring (612) is connected to the guide rod (611). The circuit board (8) includes a power supply welding head (801) and a wire storage groove (802) installed near the power supply welding head (801). A baffle (804) is installed at the top of the wire storage groove (802). A clamping block (803) is installed on the side wall of the wire storage groove (802). The guide rod (611) is slidably matched with the wire storage groove (802). A wire passing hole (9) is opened on the plastic fixing plate (7). The wire of the electric motor body (5) passes through the wire passing hole (9) and is placed on the power supply welding head (801). A pressing pad (614) is installed at the bottom of the isolation sleeve (603). The pressing pad (614) presses the wire of the electric motor body (5). The bottom of the pushing block (608) is installed with a cartridge (609). A number of buckles (617) are installed in the cartridge (609), and the buckles (617) are snap-connected with the clamping blocks (803) on the storage wire groove (802); the cylinder (607) penetrates through the pushing block (608) to press the buckles (617) inside the cartridge (609), and snap-fits the buckles (617) with the clamping blocks (803) on the storage wire groove (802).

2. A laser welding process for welding an electric toothbrush motor, characterized in that, The process is applied to a laser welding machine for welding an electric toothbrush motor as described in claim 1, and the process includes the following steps: Step S1: Fix the motor body (5) and the circuit board (8) at both ends of the plastic fixing plate (7) respectively, reduce the influence of the working vibration of the motor body (5) on the circuit board (8), and at the same time, the power line of the motor body (5) passes through the wire passing hole (9) and is placed on the power welding head (801). Place the assembled motor body (5) and circuit board (8) into the sliding sleeve (4), and the driving guide rail (3) transports the sliding sleeve (4) to the bottom of the welding assembly (6); Step S2: Start the welding assembly (6). The welding assembly (6) drives the isolation sleeve (603) to move down, sleeved the isolation sleeve (603) on the power welding head (801), isolate the power welding head (801) from the nearby devices through the isolation sleeve (603), and at the same time, the pressing pad (614) at the bottom of the isolation sleeve (603) presses the power line of the motor body (5); Step S3: When the welding assembly (6) welds the power welding head (801) and the power line of the motor body (5), the isolation sleeve (603) isolates the welding heat inside the isolation sleeve (603), so that the heat accumulated inside the isolation sleeve (603) accelerates the melting of the solder joints on the power welding head (801); Step S4: During the welding process, the cylinder (607) is started. The cylinder (607) pushes the pushing block (608) to move down. Under the sliding fit of the slider (615) and the spiral groove (605), the rotating sleeve (610) rotates downward in a spiral manner, and the guiding rod (611) retracts into the rotating sleeve (610) and presses the return spring (612). At the same time, the rotating sleeve (610) drives the guiding rod (611) to rotate; Step S5: During the rotation of the guiding rod (611), the pressing block (613) on the guiding rod (611) presses the rubber telescopic cylinder (606), and the gas inside the rubber telescopic cylinder (606) is discharged from the bottom of the isolation sleeve (603) through the air holes (604) at the top of the isolation sleeve (603), accelerating the dissipation of the welding heat inside the isolation sleeve (603), and the welding heat is discharged from the air holes (604) at the top of the isolation sleeve (603).

3. The laser welding process for welding an electric toothbrush motor according to claim 2, characterized in that, The specific steps of step S4 include the following steps: Step S41: During the rotation of the guiding rod (611), the guiding rod (611) drives the redundant power line of the motor body (5) to be pushed into the storage wire groove (802), and introduces the redundant power line into the storage wire groove (802). Step S42: As the cylinder (607) drives the pushing block (608) to move downward, the cartridge (609) at the bottom of the pushing block (608) moves downward accordingly. When the cartridge (609) contacts the storage wire groove (802), the cylinder (607) pushes the buckle (617) inside the cartridge (609) downward, so that the buckle (617) engages with the locking block (803) on the storage wire groove (802), and the excess power line is fixed inside the storage wire groove (802).

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