Welding device for top cover of washing machine

Abstract

The utility model discloses a welding device for a top cover of a washing machine. Comprising a welding machining table, an ultrasonic welding machine body installed on the welding machining table, a welding head fixedly installed at the output end of the ultrasonic welding machine body and used for welding a washing machine top cover and a control panel, and a U-shaped fixing base fixedly installed on the welding machining table and used for fixing the washing machine top cover. An unwinding roller and a winding roller are rotationally arranged on the portions, located on the two sides of the U-shaped fixing base, of the welding machining table correspondingly, the unwinding roller is sleeved with a washing machine top cover protection mold, a clamping assembly for clamping and winding the washing machine top cover protection mold is arranged on the winding roller, and long-strip-shaped holes allowing the washing machine top cover protection mold to penetrate through are formed in the two sides of the U-shaped fixing base; the bottom of the long-strip-shaped hole is flush with the inner bottom of the U-shaped fixing base, and a rotating assembly for controlling the unwinding roller and the winding roller to rotate synchronously is arranged on the welding machining table. The utility model has the following advantages and effects: the protective film is easy and convenient to replace, clean and sanitary.

Description

Technical Field

[0001] The utility model relates to the technical field of washing machine production and manufacturing, in particular to a welding device for a washing machine top cover. Background Art

[0002] The top cover of existing vertical washing machines is generally equipped with a control panel for controlling the start and stop functions of the washing machine. Since the control panel and the top cover of the washing machine are both made of plastic, an ultrasonic welding machine is usually used for welding when the two are assembled. At present, in the actual welding process of the washing machine top cover and the control panel, in order to prevent the welding head of the ultrasonic welding machine from leaving indentations on the outer surface of the washing machine top cover and the control panel, it is usually necessary to pad a layer of protective film on the bottom of the fixing seat that fixes the washing machine top cover and the side of the control panel that contacts the welding head. The control panel itself has a protective film, and workers do not need to lay it frequently, but the protective film at the bottom of the fixing seat requires workers to use tape to stick it to the bottom of the fixing seat. Not only is it very inconvenient to replace the protective film, but the tape will also leave offset marks on the bottom of the fixing seat, making it more difficult to clean the fixing seat. Utility Model Content

[0003] The utility model aims to provide a welding device for a washing machine top cover, which has the effects of easy and convenient replacement of a protective film and clean and sanitary effects.

[0004] The above technical purpose of the utility model is achieved through the following technical solutions: a welding device for a washing machine top cover, comprising a welding processing table, an ultrasonic welding machine body installed on the welding processing table, a welding head fixedly installed on the output end of the ultrasonic welding body and used for welding the washing machine top cover and the control panel, and a U-shaped fixing seat fixedly installed on the welding processing table and used for fixing the washing machine top cover, the welding processing table is located on both sides of the U-shaped fixing seat and is rotatably provided with a unwinding roller and a winding roller, the unwinding roller is sleeved with a washing machine top cover protection mold, the winding roller is provided with a clamping assembly for clamping and winding the washing machine top cover protection mold, long strip holes are opened on both sides of the U-shaped fixing seat for the washing machine top cover protection mold to pass through, and the bottom of the long strip hole is flush with the inner bottom of the U-shaped fixing seat, and a rotating assembly for controlling the unwinding roller and the winding roller to rotate synchronously is provided on the welding processing table.

[0005] The utility model is further configured as follows: the clamping assembly includes a fixed clamping cylinder fixedly mounted on the winding roller, a pair of connecting rods one end of which is fixedly connected to the winding roller and located on both sides of the fixed clamping cylinder, a rotating clamping rod parallel to the fixed clamping cylinder, a pair of hinged shafts fixedly connected to both ends of the rotating clamping rod and respectively rotating through the two connecting rods one, a knob fixed to one end of an hinged shaft, a torsion spring mounted on a hinged shaft and fixedly connected to the knob and the connecting rod one at both ends, the hinged shaft is eccentrically connected to the rotating clamping rod, and the farthest distance from the axis center of the hinged shaft to the contour surface of the rotating clamping rod is greater than or equal to the distance from the axis center of the hinged shaft to the contour surface of the fixed clamping cylinder.

[0006] The utility model is further configured as follows: the rotating assembly includes a rotating shaft rotatably arranged on the welding processing table and vertically rotating through a U-shaped fixed seat, a pair of worm gears respectively fixedly installed on one end of the unwinding roller and the winding roller, a pair of worms fixedly installed on the rotating shaft and respectively meshing with the two worm gears, and a hand crank fixedly installed on one end of the rotating shaft.

[0007] The utility model is further configured as follows: a pair of tension rollers parallel to the unwinding rollers or the winding rollers are rotatably arranged on both sides of the U-shaped fixing seat, and the tension rollers are located below the long hole, and the bottoms of the long hole are tangent.

[0008] The utility model is further configured as follows: the welding processing table is located at both ends of the unwinding roller and are respectively provided with a fixed support and a movable support for supporting the rotation of the unwinding roller; the fixed support is fixed to the welding processing table, and one end of the unwinding roller is rotatably connected to the fixed support; the movable support includes an articulated seat fixed to the welding processing table, a pair of connecting rods whose one ends are jointly hinged to the articulated seat, a pair of support wheels respectively rotated on the upper ends of the two connecting rods, and a locking plate that movably passes through the gap between the articulated seat and the lower ends of the two connecting rods; the sides of the lower ends of the two connecting rods that are close to each other are rounded corners, and the sides that are away from each other are angular corners, and the top of the locking plate is in parallel contact with the end of the lower end of the two connecting rods, and one end of the unwinding roller is placed on the two support wheels.

[0009] The utility model is further configured as follows: the locking plate is provided with a square through hole penetrating the top and the bottom thereof, and the square through hole is close to one end of the locking plate.

[0010] The beneficial effects of the utility model are:

[0011] 1. By adopting the above-mentioned unwinding roller, winding roller, rotating assembly and other structures, when it is necessary to replace the washing machine top cover protection mold, first manually crank the hand crank to rotate the rotating shaft, and then the two worm gears on the rotating shaft will respectively engage and drive the two worm wheels, so that the unwinding roller and the winding roller connected to the two worm wheels respectively rotate synchronously, and then the new part of the washing machine top cover protection mold will be released from the unwinding roller and pass through the long strip hole into the U-shaped fixing seat, while the old part will pass through another long strip hole to pass through the U-shaped fixing seat, and finally be wound onto the winding roller. Not only can the new and old washing machine top cover protection molds be replaced in this way, but also due to the self-locking characteristics of the worm wheel and the worm, the new washing machine top cover protection mold can be stably fixed on the inner bottom of the U-shaped fixing seat. Compared with the traditional manual replacement and tape fixing of the washing machine top cover protection mold, this structure is easier and more convenient to replace the washing machine top cover protection mold, and there is no need to fix it with tape or the like. Among them, the tensioning rollers on both sides of the U-shaped fixing seat can ensure that the washing machine top cover protection mold passes through the long hole safely and smoothly.

[0012] 2. By adopting the above-mentioned structures such as the winding roller, the clamping assembly and the movable support, when the washing machine top cover protection mold on the unwinding roller is used up, first use scissors and other tools to clean the old washing machine top cover protection mold on the winding roller and the U-shaped fixed seat, then manually pull out the locking plate in the gap between the hinge seat and the second connecting rod to release the lock of the second connecting rod relative to the hinge seat, and then manually break the two connecting rods apart to facilitate the staff to put a new washing machine top cover protection mold coil from one end of the unwinding roller, and then close the two connecting rods again and insert the locking plate back, so that the support wheel at the upper end of the second connecting rod can lift one end of the unwinding roller again to ensure stable unwinding of the unwinding roller, and then manually shake the hand crank to pull out part of the washing machine protective film in the coil, and at the same time manually guide this part of the washing machine top cover protection mold through the two ends of the U-shaped fixed seat. The long hole, when the top cover protective film of the washing machine passes through the long hole to the side of the winding roller, the knob is manually turned to rotate the rotating clamp rod between the connecting rods. Since the hinge shaft of the rotating connecting rod is eccentrically connected to the rotating clamp rod, the rotating clamp rod will gradually move away from the fixed clamp barrel on the winding roller during the rotation process and open a gap. Finally, the top cover protective film of the washing machine is manually guided through the gap, and the knob is released. The torsion spring will rebound quickly, causing the hinge shaft to drive the rotating clamp rod to rotate in the opposite direction. Because the farthest distance from the axis of the hinge shaft to the contour surface of the rotating clamp rod is greater than or equal to the distance from the axis of the hinge shaft to the contour surface of the fixed clamp barrel, the rotating clamp rod will clamp the top cover protective film of the washing machine passing through the gap during the reverse rotation process, thereby realizing a stable connection between the top cover protective film of the washing machine and the winding roller. Among them, the square through hole on the locking plate can facilitate the user to quickly pull out the locking plate from the gap between the hinge seat and the second connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 Schematic diagram of the three-dimensional structure of this embodiment;

[0015] Figure 2 Schematic diagram of the positional relationship between the U-shaped fixing seat, the unwinding roller and the winding roller of this embodiment;

[0016] Figure 3 is a schematic diagram of the structure of the clamping assembly of this embodiment;

[0017] Figure 4 Schematic diagram of the connection between the unwinding roller and the welding processing table of this embodiment;

[0018] Figure 5 is a schematic diagram of the positional relationship between the hinge seat, the second connecting rod and the locking plate of this embodiment;

[0019] In the figure, 1, welding processing table; 2, ultrasonic welding machine body; 3, welding head; 4, U-shaped fixed seat; 41, long strip hole; 5, unwinding roller; 6, winding roller; 7, washing machine top cover protection mold; 8, clamping assembly; 81, fixed clamping cylinder; 82, connecting rod one; 83, rotating clamping rod; 84, hinge shaft; 85, knob; 86, torsion spring; 9, rotating assembly; 91, rotating shaft; 92, worm gear; 93, worm; 94, hand crank; 10, tensioning roller; 11, fixed support; 12, movable support; 121, hinged seat; 122, connecting rod two; 123, support wheel; 124, locking plate; 125, square through hole. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment: A welding device for a washing machine top cover, such as Figure 1 , Figure 2As shown, it includes a welding processing table 1, an ultrasonic welding machine body 2 installed on the welding processing table 1, a welding head 3 fixedly installed on the output end of the ultrasonic welding body and used for welding the washing machine top cover and the control panel, and a U-shaped fixing seat 4 fixedly installed on the welding processing table 1 and used for fixing the washing machine top cover. The welding processing table 1 is located on both sides of the U-shaped fixing seat 4 and is rotatably provided with a unwinding roller 5 and a winding roller 6, the unwinding roller 5 is sleeved with a washing machine top cover protection mold 7, and the winding roller 6 is provided with a clamping component 8 for clamping and winding the washing machine top cover protection mold 7. Long strip holes 41 for the washing machine top cover protection mold 7 to pass through are opened on both sides of the U-shaped fixing seat 4, and the bottom of the long strip hole 41 is flush with the inner bottom of the U-shaped fixing seat 4, and a rotating component 9 for controlling the unwinding roller 5 and the winding roller 6 to rotate synchronously is provided on the welding processing table 1. Among them, a pair of tensioning rollers 10 parallel to the unwinding rollers 5 or the winding rollers 6 are rotatably arranged on both sides of the U-shaped fixing seat 4. The tensioning rollers 10 are located below the long hole 41, and the bottoms of the long hole 41 are tangent.

[0022] like Figure 2 , Figure 3 As shown, the clamping assembly 8 includes a fixed clamping cylinder 81 fixedly mounted on the winding roller 6, a pair of connecting rods 82 fixedly connected at one end to the winding roller 6 and located on both sides of the fixed clamping cylinder 81, a rotating clamping rod 83 parallel to the fixed clamping cylinder 81, a pair of hinge shafts 84 fixedly connected at both ends of the rotating clamping rod 83 and respectively rotating through the two connecting rods 82, a knob 85 fixed at one end of a hinge shaft 84, and a torsion spring 86 mounted on the hinge shaft 84 and fixedly connected at both ends to the knob 85 and the connecting rod 82, the hinge shaft 84 is eccentrically connected to the rotating clamping rod 83, and the farthest distance from the axis of the hinge shaft 84 to the contour surface of the rotating clamping rod 83 is greater than or equal to the distance from the axis of the hinge shaft 84 to the contour surface of the fixed clamping cylinder 81.

[0023] like Figure 2 As shown, the rotating assembly 9 includes a rotating shaft 91 rotatably arranged on the welding processing table 1 and vertically rotating through the U-shaped fixed seat 4, a pair of worm gears 92 respectively fixedly installed on one end of the unwinding roller 5 and the winding roller 6, a pair of worms 93 fixedly installed on the rotating shaft 91 and respectively meshing with the two worm gears 92, and a hand crank 94 fixedly installed on one end of the rotating shaft 91.

[0024] like Figure 2 , Figure 4 , Figure 5As shown, the welding processing table 1 is located at both ends of the unwinding roller 5 and is respectively provided with a fixed support 11 and a movable support 12 for supporting the rotation of the unwinding roller 5. The fixed support 11 is fixed on the welding processing table 1, and one end of the unwinding roller 5 is rotatably connected to the fixed support 11. The movable support 12 includes an articulated seat 121 fixed on the welding processing table 1, a pair of connecting rods 122 whose one ends are jointly hinged to the articulated seat 121, a pair of support wheels 123 respectively rotated on the upper ends of the two connecting rods 122, and a locking plate 124 that movably passes through the gap between the articulated seat 121 and the lower end of the connecting rod 122. The side of the lower end of the connecting rod 122 that is close to each other is a rounded corner, and the side that is away from each other is an angular corner, and the top of the locking plate 124 is in parallel contact with the end of the lower end of the connecting rod 122, and one end of the unwinding roller 5 is placed on the two support wheels 123. The locking plate 124 is provided with a square through hole 125 penetrating the top and bottom thereof, and the square through hole 125 is close to one end of the locking plate 124 .

[0025] The working principle of this embodiment:

[0026] When it is necessary to replace the washing machine top cover protection mold 7, first manually crank the hand crank handle 94 to rotate the rotating shaft 91, and then the two worm gears 93 on the rotating shaft 91 will respectively engage and drive the two worm wheels 92, so that the unwinding roller 5 and the winding roller 6 respectively connected to the two worm wheels 92 rotate synchronously, and then the new part of the washing machine top cover protection mold 7 will be released from the unwinding roller 5 and pass through the long strip hole 41 into the U-shaped fixing seat 4, while the old part will pass through another long strip hole 41 to pass through the U-shaped fixing seat 4 and finally be wound onto the winding roller 6. Not only can the new and old washing machine top cover protection molds 7 be replaced in this way, but also due to the self-locking characteristics of the worm wheel 92 and the worm gear 93 themselves, it can also ensure that the new washing machine top cover protection mold 7 is stably fixed on the inner bottom of the U-shaped fixing seat 4. Compared with the traditional manual replacement and tape fixing of the washing machine top cover protection mold 7, this structure is easier and more convenient to replace the washing machine top cover protection mold 7, and there is no need to use tape or other methods to fix it. The tensioning rollers 10 on both sides of the U-shaped fixing seat 4 can ensure that the washing machine top cover protection mold 7 passes through the long hole 41 safely and smoothly.

[0027] When the washing machine top cover protection mold 7 on the unwinding roller 5 is used up, first use scissors or other tools to clean the old washing machine top cover protection mold 7 on the winding roller 6 and the U-shaped fixing seat 4, then manually pull out the locking plate 124 of the gap between the hinge seat 121 and the second connecting rod 122 to release the locking of the second connecting rod 122 relative to the hinge seat 121, and then manually pry apart the two second connecting rods 122 to facilitate the staff to put a new washing machine top cover protection mold 7 roll from one end of the unwinding roller 5, then close the two second connecting rods 122 again, and insert the locking plate 124 back, so that the supporting wheel 123 at the upper end of the second connecting rod 122 can lift one end of the unwinding roller 5 again to ensure that the unwinding roller 5 is stably unwound, and then manually shake the hand crank 94 to pull out part of the washing machine protective film in the roll, and at the same time manually guide this part of the washing machine top cover protection mold 7 through the two long holes 41 of the U-shaped fixing seat 4, and wait until the washing machine is finished. When the top cover protective film of the washing machine passes through the long hole 41 to the side of the winding roller 6, the knob 85 is manually turned to rotate the rotating clamp rod 83 between the connecting rod 82. Since the hinge shaft 84 of the rotating connecting rod is eccentrically connected to the rotating clamp rod 83, the rotating clamp rod 83 will gradually move away from the fixed clamp cylinder 81 on the winding roller 6 during the rotation process and open a gap. Finally, the washing machine top cover protective film is manually guided through the gap and the knob 85 is released. The torsion spring 86 will rebound quickly, causing the hinge shaft 84 to drive the rotating clamp rod 83 to rotate in the opposite direction. Because the maximum distance from the axis of the hinge shaft 84 to the contour surface of the rotating clamp rod 83 is greater than or equal to the distance from the axis of the hinge shaft 84 to the contour surface of the fixed clamp cylinder 81, the rotating clamp rod 83 will clamp the washing machine top cover protective film passing through the gap during the reverse rotation process, thereby achieving a stable connection between the washing machine top cover protective film and the winding roller 6. The square through hole 125 on the locking plate 124 can facilitate the user to quickly pull out the locking plate 124 from the gap between the hinge seat 121 and the second connecting rod 122 .

Claims

1. A welding device for a washing machine top cover, comprising a welding processing table (1), an ultrasonic welding machine body (2) mounted on the welding processing table (1), a welding head (3) fixedly mounted on the output end of the ultrasonic welding body and used for welding the washing machine top cover and the control panel, and a U-shaped fixing seat (4) fixedly mounted on the welding processing table (1) and used for fixing the washing machine top cover, characterized in that: The welding processing table (1) is located on both sides of a U-shaped fixed seat (4) and is rotatably provided with an unwinding roller (5) and a winding roller (6), the unwinding roller (5) is sleeved with a washing machine top cover protection mold (7), the winding roller (6) is provided with a clamping component (8) for clamping and winding the washing machine top cover protection mold (7), both sides of the U-shaped fixed seat (4) are provided with long holes (41) for the washing machine top cover protection mold (7) to pass through, and the bottom of the long hole (41) is flush with the inner bottom of the U-shaped fixed seat (4), and the welding processing table (1) is provided with a rotating component (9) for controlling the unwinding roller (5) and the winding roller (6) to rotate synchronously.

2. A welding device for a washing machine top cover according to claim 1, characterized in that: The clamping assembly (8) comprises a fixed clamping cylinder (81) fixedly mounted on the winding roller (6), a pair of connecting rods (82) fixedly connected at one end to the winding roller (6) and located on both sides of the fixed clamping cylinder (81), a rotating clamping rod (83) parallel to the fixed clamping cylinder (81), a pair of hinge shafts (84) fixedly connected at both ends of the rotating clamping rod (83) and respectively rotating through the two connecting rods (82), a knob (85) fixed at one end of a hinge shaft (84), and a torsion spring (86) mounted on a hinge shaft (84) and fixedly connected at both ends to the knob (85) and the connecting rod (82), wherein the hinge shaft (84) is eccentrically connected to the rotating clamping rod (83), and the farthest distance from the axis of the hinge shaft (84) to the contour surface of the rotating clamping rod (83) is greater than or equal to the distance from the axis of the hinge shaft (84) to the contour surface of the fixed clamping cylinder (81).

3. A welding device for a washing machine top cover according to claim 1, characterized in that: The rotating assembly (9) comprises a rotating shaft (91) rotatably mounted on the welding processing table (1) and vertically rotating through the U-shaped fixing seat (4), a pair of worm gears (92) respectively fixedly mounted on one end of the unwinding roller (5) and the winding roller (6), a pair of worms (93) fixedly mounted on the rotating shaft (91) and respectively meshing with the two worm gears (92), and a hand crank (94) fixedly mounted on one end of the rotating shaft (91).

4. A welding device for a washing machine top cover according to claim 1, characterized in that: A pair of tensioning rollers (10) parallel to unwinding rollers (5) or winding rollers (6) are rotatably arranged on both sides of the U-shaped fixing seat (4); the tensioning rollers (10) are located below the long hole (41) and are tangent to the bottom of the long hole (41).

5. A welding device for a washing machine top cover according to claim 1, characterized in that: The welding processing table (1) is provided with a fixed support (11) and a movable support (12) at both ends of the unwinding roller (5) for supporting the unwinding roller (5) to rotate, respectively; the fixed support (11) is fixed on the welding processing table (1), and one end of the unwinding roller (5) is rotatably connected to the fixed support (11); the movable support (12) comprises an articulated seat (121) fixed on the welding processing table (1), a pair of connecting rods (121) whose one end is jointly articulated to the articulated seat (121), and a movable support (12) disposed on the welding processing table (1). 122), a pair of supporting wheels (123) respectively rotating on the upper ends of the two connecting rods (122), and a locking plate (124) movably passing through the gap between the hinge seat (121) and the lower end of the connecting rod (122), the sides of the lower ends of the connecting rods (122) close to each other are rounded, and the sides away from each other are angular, and the top of the locking plate (124) is in parallel contact with the end of the lower end of the connecting rod (122), and one end of the unwinding roller (5) is placed on the two supporting wheels (123).

6. A welding device for a washing machine top cover according to claim 5, characterized in that: The locking plate (124) is provided with a square through hole (125) penetrating the top and bottom thereof, and the square through hole (125) is close to one end of the locking plate (124).

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