Plasma arc welding device for machining inner container of dish washing machine

Abstract

The invention relates to the technical field of welding equipment, in particular to a plasma arc welding device for dish-washing machine inner container machining, which comprises a working bearing plate, a movable welding assembly is arranged on the working bearing plate, an inner container and a top cover are welded through the movable welding assembly, and the movable welding assembly is connected with a top cover positioning assembly. The top cover positioning assembly is connected with an inner container positioning assembly, alignment positioning of a top cover and an inner container is achieved through cooperation of the top cover positioning assembly and the inner container positioning assembly, when seamless welding of the inner container and the top cover is carried out, the inner container is positioned through an inner container limiting sleeve, and then an electric telescopic rod is started to drive a driving carrier to move. The rotating bearing ring can be driven to move downwards along with downward movement of the strip-shaped frame, then the top cover is inserted into the top cover limiting sleeve from the upper portion of the top cover limiting sleeve, rapid alignment and positioning of the top cover and the inner container are achieved, and welding work is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, in particular to a plasma arc welding device for processing the inner tank of a dishwasher. Background Art

[0002] The top cover is the top part of the dishwasher's inner tank, which is usually connected to the outer cover. During the production of the inner tank, the top cover and the inner tank need to be seamlessly welded together through automatic or semi-automatic arc welding equipment. Welding the top cover and the inner tank body can ensure that the entire inner tank forms a complete sealed space to prevent water or steam from leaking during the washing process. When welding the top cover to the inner end, the staff often need to spend more time on positioning the inner tank and the top cover, because the staff need to use a clamp to align the top cover and the inner tank. The alignment operation is not convenient enough, which makes the staff's work intensity greater and also affects the welding work efficiency. Moreover, when welding the two, since multiple surfaces need to be welded, it is often necessary to set up welders in multiple directions for welding. The control operation is relatively complicated and the device cost is high. Summary of the Invention

[0003] The object of the present invention is to provide a plasma arc welding device for processing the inner tank of a dishwasher, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A plasma arc welding device for processing the inner tank of a dishwasher comprises a work plate, on which a movable welding assembly is provided, and the inner tank and the top cover are welded by the movable welding assembly; The movable welding assembly is connected to a top cover positioning assembly, and the top cover positioning assembly is connected to an inner liner positioning assembly; The top cover positioning assembly and the inner liner positioning assembly cooperate to achieve alignment and positioning of the top cover and the inner liner, and the top cover positioning assembly and the inner liner positioning assembly can rotate synchronously; The work plate is also equipped with a positioning assembly fixing mechanism, which can fix the top cover positioning assembly and the inner tank positioning assembly to ensure the stability of the two during the welding process; The movable welding assembly is also provided with a rotary drive assembly, which drives the top cover positioning assembly and the liner positioning assembly to rotate, and the rotary drive assembly can also limit the positioning assembly fixing mechanism.

[0005] Preferably, the movable welding assembly is a driving carrier, and a welder is fixedly mounted on one side of the driving carrier.

[0006] Preferably, the top cover positioning assembly includes a strip frame, a rotating bearing ring and a rotating bearing column. The strip frame is movably mounted on the working support plate. The strip frame is connected to the driving carrier, and the driving carrier drives the strip frame to move.

[0007] Preferably, a rotating bearing ring is movably mounted on the strip frame, and a top cover limiting sleeve is fixedly arranged inside the rotating bearing ring.

[0008] Preferably, the upper end of the rotating support column is connected to the rotating support ring, and the lower end of the rotating support column is connected to the inner liner positioning assembly.

[0009] Preferably, the inner liner positioning component is an inner liner limiting sleeve, and the inner liner limiting sleeve is movably mounted on the working support plate, and the inner liner limiting sleeve positions the inner liner.

[0010] Preferably, the positioning assembly fixing mechanism includes a connecting frame plate and a movable fixed ring plate, the connecting frame plate is movably connected to the movable fixed ring plate, and the movable fixed ring plate can be restricted by the connecting frame plate.

[0011] Preferably, a movable fixed ring rod is fixedly provided at the lower end of the movable fixed ring plate, and a fixed ring ball is fixedly provided at the lower end of the movable fixed ring rod, and the inner liner limiting sleeve is positioned by the fixed ring ball.

[0012] Preferably, the rotation drive assembly includes a rack and a fixed bar block, and the rack can drive the inner liner limiting sleeve to rotate.

[0013] Preferably, the fixed bar block cooperates with the rack to support the rack.

[0014] Preferably, when the rack limits the connection frame plate, the fixed ring plays a role in fixing the inner liner limiting sleeve.

[0015] Compared with the prior art, the present invention has the following advantages: 1. When seamlessly welding the liner and the top cover, position the liner through the liner limit sleeve, then start the electric telescopic rod to drive the carrier to move, and then drive the bar frame to move downward. As the bar frame moves downward, the rotating bearing ring can be driven to move downward. Then, insert the top cover from the top cover limit sleeve into the top cover limit sleeve to achieve the alignment of the liner and the top cover, and realize the positioning of the top cover so that the two are in contact with each other, so as to achieve rapid alignment and positioning of the top cover and the liner, and facilitate the welding work.

[0016] 2. After the two are aligned, start the electric telescopic rod and continue to move it, so that the welder can be driven to weld the weld on one side. After welding, start the electric telescopic rod to move in the opposite direction. In the process of driving the carrier to move in the opposite direction, the electric telescopic rod will drive the inner liner limit sleeve and the rotating bearing ring to rotate, so that the unwelded surface can be rotated to the side of the welder, and the welder can weld it. That is, the welding work can be completed using one welder through the synchronous rotation of the inner liner and the top cover, which is very convenient.

[0017] 3. In addition, during the welding process, the rotating wheel of the welder can limit the connecting frame plate, and then limit the fixed ball so that it can be stably inserted in the spherical groove, thereby fixing the inner liner limit sleeve and the rotating bearing ring, ensuring the smooth progress of the welding work. After one side is welded, the continued movement of the driving carrier will cause the rack to move downward, thereby removing the restriction on the connecting frame plate, and the inner liner limit sleeve and the rotating bearing ring are in an unlocked state. The rack can drive them to rotate, thereby achieving a smooth conversion of the welding surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a first-person perspective diagram of the work platform assembly.

[0019] Figure 2 A second-view diagram of the work deck assembly.

[0020] Figure 3 It is a structural diagram of the working support plate.

[0021] Figure 4 The figure shows the assembly diagram of the drive carrier.

[0022] Figure 5 Schematic diagram of the structure of the driving carrier.

[0023] Figure 6 Schematic diagram of the structure of the strip frame.

[0024] Figure 7 This is a schematic diagram of the assembly of the bar frame, rotating bearing ring and rotating bearing column.

[0025] Figure 8 This is a first-person perspective diagram of the assembly of the inner tank limit sleeve and the connecting frame plate.

[0026] Figure 9 This is a second-angle diagram of the assembly of the inner tank limit sleeve and the connecting frame plate.

[0027] Figure 10 Schematic diagram of the connection between the frame plate, rack and top bar block.

[0028] Figure: 1, working plate; 11, supporting vertical plate; 12, electric telescopic rod; 13, supporting guide rod; 14, first side bearing bar; 141, upper push inclined plane; 15, second side bearing bar; 151, side push inclined plane; 16, mounting bearing plate; 161, lower plug connection hole; 162, first loading hole; 17, supporting outer convex plate; 171, limiting channel; 18, outer bearing bar; 181, second loading hole; 19, convex Lifting plate; 191, matching bearing hole; 2, driving carrier; 21, upper convex connecting block; 22, matching guide channel; 23, side bearing convex plate; 24, supporting push-down block; 25, first side support bar; 26, welding support plate; 27, welding device; 28, second side support bar; 29, upper top carrier; 291, installing vertical pole; 292, matching top block; 293, installing vertical plate; 294, installing through hole; 3, strip frame; 31, pull-down Groove; 32, pull-down retaining groove; 33, support pole; 34, load-bearing top plate; 35, support arc bar; 4, rotating bearing ring; 41, top cover limit sleeve; 42, rotating bearing groove; 43, meshing teeth; 5, rotating bearing column; 51, gear column; 52, assembly bearing; 53, gear; 6, liner limit sleeve; 61, load-bearing column; 62, matching bearing; 63, gear ring; 64, spherical groove; 7, connecting frame plate; 70, moving Guide rod; 71, movable connecting rod; 72, movable fixed ring plate; 73, connecting convex plate; 74, movable fixed ring rod; 75, fixed ring ball; 8, rack; 81, lower convex matching plate; 82, load-bearing mounting plate; 83, load-bearing mounting hole; 84, first spring; 85, limiting vertical plate; 86, positioning socket; 87, limiting frame; 88, rotating wheel; 9, fixed bar block; 91, matching convex column; 92, fixed bar rod; 93, second spring. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] The present invention provides a technical solution: like Figure 1 and Figure 2As shown, a plasma arc welding device for processing the inner tank of a dishwasher comprises a working plate 1, on which a movable welding assembly is provided, through which the inner tank and the top cover are welded, the movable welding assembly is connected to a top cover positioning assembly, which is connected to an inner tank positioning assembly, and the top cover positioning assembly and the inner tank positioning assembly cooperate to achieve alignment and positioning of the top cover and the inner tank, and the top cover positioning assembly and the inner tank positioning assembly can rotate synchronously, a positioning assembly fixing mechanism is also installed on the working plate 1, and the top cover positioning assembly and the inner tank positioning assembly can be fixed by the positioning assembly fixing mechanism to ensure the stability of the two during the welding process, a rotary drive assembly is also installed on the movable welding assembly, and the rotary drive assembly drives the top cover positioning assembly and the inner tank positioning assembly to rotate, and the rotary drive assembly can also limit the positioning assembly fixing mechanism.

[0031] like Figure 3 As shown, the two ends of the working carrier plate 1 are symmetrically fixed with supporting vertical carrier plates 11, one of the supporting vertical carrier plates 11 is fixedly installed with an electric telescopic rod 12, and a supporting guide rod 13 is fixedly provided between the two supporting vertical carrier plates 11, one side of the supporting vertical carrier plate 11 is fixedly provided with a first side bearing bar 14, and the first side bearing bar 14 is provided with an upward push inclined surface 141, and the other side of the supporting vertical carrier plate 11 is fixedly provided with a second side bearing bar 15, and the second side bearing bar 15 is provided with a side push inclined surface 151, and the upper end of the supporting vertical carrier plate 11 is also fixedly provided with The mounting plate 16 is installed, and lower plug-in connection holes 161 are symmetrically opened on the mounting plate 16. A first loading hole 162 is opened on the mounting plate 16 between the lower plug-in connection holes 161, and supporting outer convex plates 17 are symmetrically fixedly provided at both ends of the mounting plate 16, and a limiting channel 171 is opened on the supporting outer convex plate 17. An outer bearing bar 18 is also fixedly provided on one side of the mounting plate 16, and a second loading hole 181 is opened on the outer bearing bar 18, and a protruding plate 19 is fixedly provided on the outer bearing bar 18, and a matching bearing hole 191 is opened on the protruding plate 19.

[0032] like Figure 1 and Figure 5As shown, the mobile welding assembly is a driving carrier 2, a welder 27 is fixedly installed on one side of the driving carrier 2, the driving carrier 2 is fixedly mounted on the electric telescopic rod 12, an upper convex connecting block 21 is fixedly provided on the upper end of the driving carrier 2, a matching guide channel 22 is provided on the upper convex connecting block 21, a supporting guide rod 13 is inserted into the matching guide channel 22, side bearing convex plates 23 are symmetrically fixedly provided on both sides of the driving carrier 2, a supporting push-down block 24 is fixedly provided on the side bearing convex plates 23, and a first side support bar 25 is also fixedly provided on one side of the driving carrier 2. A welding support plate 26 is fixedly provided at the upper end of the first side support bar 25, and a welder 27 is fixedly mounted on the welding support plate 26. A second side support bar 28 is also fixedly provided on the other side of the driving carrier 2, and an upper support plate 29 is fixedly provided on the second side support bar 28. Mounting vertical rods 291 are symmetrically fixedly provided on the upper support plate 29, and a matching top block 292 is fixedly provided on the upper end of the mounting vertical rods 291. A mounting vertical plate 293 is fixedly provided on the upper support plate 29 between the mounting vertical rods 291, and a mounting through hole 294 is opened on the mounting vertical plate 293.

[0033] like Figure 1 and Figure 6 As shown, the top cover positioning assembly includes a bar frame 3, a rotating bearing ring 4 and a rotating bearing column 5. The bar frame 3 is movably installed on the working bearing plate 1. The bar frame 3 is connected to the driving carrier 2, and the bar frame 3 is driven to move by the driving carrier 2. The bar frame 3 is symmetrically provided with a pull-down groove 31 on both sides, and the pull-down groove 31 is connected to the pull-down retaining groove 32. The support push-down block 24 is inserted into the pull-down groove 31, and the support push-down block 24 is in contact with the inner wall of the pull-down groove 31, and the height of the pull-down groove 31 and the pull-down retaining groove 32 are equal. The two ends of the bar frame 3 are symmetrically fixed with support vertical rods 33, and the support vertical rods 33 are inserted in the limiting channel 171, and the upper end of the support vertical rod 33 is fixed with a bearing top plate 34, and the bearing top plate 34 is fixed with a support arc bar 35.

[0034] like Figure 2 and Figure 7 As shown, a rotating bearing ring 4 is movably installed on the bar frame 3, and a top cover limiting sleeve 41 is fixedly provided inside the rotating bearing ring 4. The upper end of the rotating bearing column 5 is connected to the rotating bearing ring 4, and the lower end of the rotating bearing column 5 is connected to the inner tank positioning assembly. A rotating bearing groove 42 is provided on the outside of the rotating bearing ring 4, and the supporting arc bar 35 is inserted in the rotating bearing groove 42. The lower end circumference of the rotating bearing ring 4 is provided with meshing teeth 43, and the upper end of the rotating bearing column 5 is fixedly provided with a gear column 51, which meshes with the meshing teeth 43. An assembly bearing 52 is sleeved on the gear column 51, and the assembly bearing 52 is installed in the second loading hole 181, and a gear 53 is also fixedly provided on the lower end of the rotating bearing column 5.

[0035] like Figure 1 、 Figure 8 and Figure 9 As shown, the inner liner positioning component is an inner liner limiting sleeve 6, which is movably installed on the working support plate 1. The inner liner limiting sleeve 6 positions the inner liner. A bearing column 61 is fixedly provided at the lower end of the inner liner limiting sleeve 6, and a matching bearing 62 is sleeved on the bearing column 61. The matching bearing 62 is installed in the first loading hole 162, and a gear ring 63 is fixedly provided at the lower end of the bearing column 61. The gear ring 63 is engaged with the gear 53, and a spherical groove 64 is opened on the circumference of the gear ring 63.

[0036] like Figure 2 、 Figure 8 and Figure 9 As shown, the positioning assembly fixing mechanism includes a connecting frame plate 7 and a movable fixed ring plate 72. The connecting frame plate 7 is movably connected to the movable fixed ring plate 72. The movable fixed ring plate 72 can be restricted by the connecting frame plate 7. A movable fixed ring rod 74 is fixedly provided at the lower end of the movable fixed ring plate 72. A fixed ball 75 is fixedly provided at the lower end of the movable fixed ring rod 74. The inner liner limit sleeve 6 is positioned by the fixed ball 75. A movable guide rod 70 is fixedly provided on the connecting frame plate 7. The movable guide rod 70 is inserted in the matching bearing hole 191, and the two ends of the connecting frame plate 7 are symmetrically hinged with movable connecting rods 71. A connecting protrusion 73 is fixedly provided on the movable fixed ring plate 72. The connecting protrusion 73 is hinged to the lower end of the movable connecting rod 71. The movable fixed ring rod 74 is inserted in the lower plug-in connecting hole 161, and the fixed ball 75 is partially inserted in the spherical groove 64.

[0037] like Figure 2 、 Figure 4 and Figure 10As shown, the rotary drive assembly includes a rack 8 and a fixed bar block 9. The rack 8 can drive the inner liner limiting sleeve 6 to rotate. The fixed bar block 9 cooperates with the rack 8 to support the rack 8. When the rack 8 limits the connecting frame plate 7, the fixed ball 75 fixes the inner liner limiting sleeve 6. One end of the rack 8 is fixedly provided with a lower convex matching plate 81, and a bearing mounting plate 82 is symmetrically fixed on the rack 8. A bearing mounting hole 83 is provided on the bearing mounting plate 82. A mounting vertical rod 291 is inserted into the bearing mounting hole 83. A first spring 84 is sleeved on the mounting vertical rod 291. The two ends of the first spring 84 are respectively fixed on the matching top block 292 and the bearing mounting plate 82. The rack 8 between the bearing mounting plates 82 A limiting vertical plate 85 is also fixedly provided on it, and a positioning socket 86 is provided at the lower end of the limiting vertical plate 85, and a limiting frame 87 is fixedly provided on the upper end. A rotating wheel 88 is installed on the limiting frame 87, and the rotating wheel 88 contacts the connecting frame plate 7 when it plays a limiting role on the connecting frame plate 7. A matching boss 91 is fixedly provided at the lower end of the fixed bar block 9, and a fixed bar rod 92 is also fixedly provided on the fixed bar block 9, and the fixed bar rod 92 is inserted in the mounting through hole 294. A second spring 93 is sleeved on the fixed bar rod 92, and the two ends of the second spring 93 are respectively fixed on the fixed bar block 9 and the mounting vertical plate 293, and the fixed bar rod 92 is inserted in the positioning socket 86 when it plays a supporting role on the rack 8. In addition, the second spring 93 is always in a compressed state.

[0038] When seamlessly welding the inner liner and the top cover, the inner liner is placed in the inner liner limiting sleeve 6, and is positioned by the inner liner limiting sleeve 6, and then the electric telescopic rod 12 is started to drive the driving carrier 2 to move in the direction of the second side bearing bar 15, so that the support push-down block 24 and the pull-down groove 31 cooperate to drive the strip frame 3 to move downward until the support push-down block 24 moves into the pull-down holding groove 32, and the lower convex matching plate 81 reaches the upper push inclined surface 141 at this time. Since the rack 8 is supported by the fixed bar 92 at this time, the height of the rack 8 is higher than the height of the gear 53, so the rack 8 will not engage with the gear 53 when it continues to move, and the rotating wheel 88 is in contact with the connecting frame plate 7 at this time, so that the connecting frame plate 7 can be connected. The limit is imposed so that the connecting frame plate 7 cannot move, and the fixed ball 75 can be fixed in the spherical groove 64, and the inner liner limiting sleeve 6 can be fixed under the action of the fixed ball 75, and the rotating bearing ring 4 can be driven to move downward until it moves down to work. At the same time, the gear column 51 will not be separated from the meshing teeth 43, and then the top cover is placed from the top of the top cover limiting sleeve 41 into the top cover limiting sleeve 41, and the top cover can be positioned by the top cover limiting sleeve 41, and at the same time, the top cover is aligned with the inner liner. After the top cover is lowered, it contacts the inner liner, realizing rapid alignment and positioning of the top cover and the inner liner. Then, when the support push-down block 24 moves along the pull-down holding groove 32, the welder 27 can weld the welding surface. When a welding surface is welded After the connection is completed, as the driving carrier 2 moves, the rack 8 passes over the gear 53, and the cooperating boss 91 will contact the side push inclined surface 151. Under the action of the side push inclined surface 151, the fixed bar block 9 will be pushed to move, so that the fixed bar rod 92 exits the positioning socket 86, the second spring 93 is in a stretched state, and the rack 8 moves downward under the action of gravity. The fixed bar rod 92 contacts the limiting vertical plate 85. After the rack 8 drops, the rack 8 and the gear 53 are at the same height. At this time, the rotating wheel 88 is also separated from the connecting frame plate 7, and the connecting frame plate 7 is in an unlocked state. The fixed ring 75 can move, so that when the rack 8 moves in the opposite direction, it can drive the gear 53 to rotate, and then drive the inner liner limit sleeve 6 and the rotating bearing ring 4 to rotate synchronously, thereby realizing the rotation of the welding surface. When the fixed ball 75 is aligned with the other spherical groove 64 again, it is inserted into the spherical groove 64 under the action of gravity to realize the positioning of the inner liner limit sleeve 6 to prevent it from rotating incorrectly. After the rack 8 moves in the opposite direction and separates from the gear 53, as the rack 8 continues to reset, the lower convex matching plate 81 will contact the upward push inclined surface 141, thereby causing the rack 8 to move up again until the fixed bar rod 92 is aligned with the positioning socket 86 and is inserted into the positioning socket 86 under the action of the second spring 93 to fix the rack 8. Then the carrier 2 is driven to move again to perform welding again. The process is repeated until all welding surfaces are welded. At this time, the carrier 2 is driven to reset, and the rotating bearing ring 4 is moved upward to separate from the top cover, and the welded top cover and inner liner can be removed.The operation is simple and convenient.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A plasma arc welding device for processing the inner tank of a dishwasher, comprising a work plate, characterized in that: The work plate is provided with a movable welding assembly, through which the inner tank and the top cover are welded; The movable welding assembly is connected to a top cover positioning assembly, and the top cover positioning assembly is connected to an inner liner positioning assembly; The top cover positioning assembly and the inner liner positioning assembly cooperate to achieve alignment and positioning of the top cover and the inner liner, and the top cover positioning assembly and the inner liner positioning assembly can rotate synchronously; The work plate is also equipped with a positioning assembly fixing mechanism, which can fix the top cover positioning assembly and the inner tank positioning assembly to ensure the stability of the two during the welding process; The movable welding assembly is also provided with a rotary drive assembly, which drives the top cover positioning assembly and the liner positioning assembly to rotate, and the rotary drive assembly can also limit the positioning assembly fixing mechanism.

2. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 1, characterized in that: The movable welding assembly is a driving carrier, and a welder is fixedly mounted on one side of the driving carrier.

3. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 2, characterized in that: The top cover positioning assembly includes a strip frame, a rotating bearing ring and a rotating bearing column. The strip frame is movably installed on the working support plate. The strip frame is connected to the driving carrier and is driven to move by the driving carrier.

4. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 3, characterized in that: A rotating bearing ring is movably mounted on the strip frame, and a top cover limiting sleeve is fixedly arranged inside the rotating bearing ring.

5. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 4, characterized in that: The upper end of the rotating support column is connected to the rotating support ring, and the lower end of the rotating support column is connected to the inner liner positioning assembly.

6. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 5, characterized in that: The inner liner positioning component is an inner liner limiting sleeve, which is movably installed on the working support plate and positions the inner liner.

7. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 6, characterized in that: The positioning assembly fixing mechanism includes a connecting frame plate and a movable fixed ring plate. The connecting frame plate is movably connected to the movable fixed ring plate, and the movable fixed ring plate can be restricted by the connecting frame plate.

8. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 7, characterized in that: A movable fixed ring rod is fixedly provided at the lower end of the movable fixed ring plate, and a fixed ring ball is fixedly provided at the lower end of the movable fixed ring rod, and the inner liner limiting sleeve is positioned by the fixed ring ball.

9. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 8, characterized in that: The rotary drive assembly includes a rack and a fixed bar block, and the rack can drive the inner liner limiting sleeve to rotate.

10. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 9, characterized in that: The fixed bar block cooperates with the rack to support the rack.

11. The plasma arc welding device for processing the inner tank of a dishwasher according to claim 10, characterized in that: When the rack limits the connection frame plate, the fixed ring plays a role in fixing the inner liner limiting sleeve.

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