Roller washing machine

Abstract

The invention discloses a roller washing machine. The roller washing machine comprises a box body; the inner cylinder is arranged in the box body; the tripod is arranged at the bottom of the inner cylinder and comprises a rotating shaft and at least three supporting arms; wherein the supporting arm comprises a bottom wall, side walls and an end wall, the side walls extend from the two opposite ends of the bottom wall in the direction away from the inner barrel, the end wall is connected with the bottom wall and the two side walls and located at the end, away from the rotating shaft, of the bottom wall, the two side walls, the end wall and the outer periphery of the rotating shaft are combined to form a groove, and a first positioning block is fixedly arranged in the groove; a first fixing hole and a first via hole are formed in the corresponding positions of the end, away from the rotating shaft, of the first positioning block and the end wall respectively, the inner diameter of the first via hole is larger than that of the first fixing hole, and the supporting arm penetrates through the first fixing hole and the first via hole through a first fixing piece to be fixedly connected with the barrel edge of the inner barrel. The defects caused by metal plate stamping forming of the tripod can be overcome, the split type structural design of the tripod is achieved, the quality of the tripod is improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of laundry equipment, and in particular to a drum washing machine. Background Art

[0002] The drum of a drum washing machine includes an inner drum and an outer drum. The inner drum is arranged in the outer drum. A tripod is fixed to the bottom of the inner drum, and a driving mechanism is connected to the rotating shaft in the center of the tripod to drive the inner drum to rotate, thereby washing clothes.

[0003] In the prior art, a tripod consists of a centrally located rotating shaft and three support arms spaced circumferentially around the shaft. The ends of the support arms, distal from the shaft, are secured to the sides of an inner tube via screws. The tripod itself is formed using cast aluminum. Due to the limitations of this technology, the tripod is structurally a one-piece design. However, typical defects of this technology, such as pores, pinholes, cracks, and segregation, remain unresolved, resulting in high costs and significant potential quality risks over time.

[0004] If the support arms were formed separately using sheet metal stamping technology, since sheet metal stamping is a cold stamping process, it produces less pollution, does not have the aforementioned defects of cast aluminum molding, and has high part stability and low cost, which can greatly improve the quality of the tripod. However, since the accuracy of the punching position in sheet metal stamping is difficult to ensure, it is easy for the fixed connection with the inner tube to not align correctly, resulting in a low yield rate. In addition, the support arms are directly stamped and stretched from sheet material, and the end away from the rotating shaft is thin. If they are directly punched and screwed to the inner tube, the force is weak and the connection is less stable. These technical issues have delayed the manufacture of tripods using sheet metal stamping technology. Summary of the Invention

[0005] The present application provides a drum washing machine that can solve the defects caused by a tripod formed by sheet metal stamping, realize a split structural design of the tripod, improve the quality of the tripod and reduce the cost.

[0006] A drum washing machine, comprising: a housing; an inner drum disposed in the housing; a tripod disposed at the bottom of the inner drum, the tripod comprising a rotating shaft and at least three support arms, the at least three support arms being spaced apart along the circumference of the rotating shaft, and one end of each support arm being fixedly connected to the rotating shaft;

[0007] In which, the support arm includes a bottom wall, side walls extending from opposite ends of the bottom wall in a direction away from the inner cylinder, and end walls connecting the bottom wall and the two side walls, the end wall is located at the end of the bottom wall away from the rotating shaft, the bottom wall, the two side walls, the end wall and the outer periphery of the rotating shaft form a groove, a first positioning block is fixedly provided in the groove, the end of the first positioning block away from the rotating shaft is in contact with the end wall, a first fixing hole and a first through hole are respectively opened at the end of the first positioning block away from the rotating shaft and the corresponding positions on the end wall, the inner diameter of the first through hole is larger than the inner diameter of the first fixing hole, and the support arm is fixedly connected to the tube edge of the inner cylinder through a first fixing member passing through the first fixing hole and the first through hole.

[0008] In an exemplary embodiment of the present disclosure, the bottom wall portion protrudes in a direction away from the inner cylinder to form a first positioning portion, the first positioning block forms a first recess corresponding to the first positioning portion, the first recess is docked with the first positioning portion, and a second fixing hole and a third fixing hole are respectively provided at positions corresponding to the first positioning block and the first positioning portion, and the first positioning block is fixedly connected to the bottom wall through a second fixing member passing through the second fixing hole and the third fixing hole.

[0009] In an exemplary embodiment of the present disclosure, two first fixing holes are provided on the first positioning block at intervals along the width direction of the support arm, and two second fixing holes are provided on the first positioning block at intervals along the length direction of the support arm, and the two second fixing holes are located between the two first fixing holes.

[0010] In an exemplary embodiment of the present disclosure, a second positioning block is further provided in the groove, the second positioning block is fixedly connected to the bottom wall, a second through hole is opened on the bottom wall at a position corresponding to the second positioning block, a positioning pin is provided on the second positioning block, the positioning pin passes through the second through hole, and the inner diameter of the second through hole is larger than the outer diameter of the positioning pin.

[0011] In an exemplary embodiment of the present disclosure, an inner diameter of the first through hole is 3 mm to 5 mm larger than an inner diameter of the first fixing hole.

[0012] In an exemplary embodiment of the present disclosure, the bottom wall portion protrudes in a direction away from the inner cylinder to form a second positioning portion, and the second positioning block forms a second recess corresponding to the second positioning portion, and the second recess and the second positioning portion are docked.

[0013] In an exemplary embodiment of the present disclosure, a fourth fixing hole and a fifth fixing hole are respectively provided at corresponding positions of the second positioning block and the second positioning portion, and the second positioning block is fixedly connected to the bottom wall through a third fixing member passing through the fourth fixing hole and the fifth fixing hole; the second through hole is opened on the second positioning portion, and the positioning pin is arranged at a corresponding position on the second recess.

[0014] In an exemplary embodiment of the present disclosure, the bottom wall portion protrudes in a direction away from the inner cylinder to form a reinforcing rib, and the reinforcing rib extends along a length direction of the support arm.

[0015] In an exemplary embodiment of the present disclosure, the support arm also includes a side wing formed by extending outward from one end of the side wall away from the bottom wall, and a plurality of reinforcing portions are provided at intervals along the length direction of the support arm at the junction of the side wing and the side wall, and the reinforcing portions protrude toward the inner cylinder.

[0016] In an exemplary embodiment of the present disclosure, the support arm is fixed to the rotating shaft by welding.

[0017] Beneficial effects:

[0018] In the present application, the structural strength of one end of the support arm connected to the inner cylinder is improved by setting the first positioning block, and the depth of the hole connected to the first fixing member is longer, which can withstand greater force. When the support arm is connected to the inner cylinder, the first fixing member is connected to the reinforcement member, which indirectly realizes the function of fixing the first reinforcement member to the support arm, and solves the problem that when the support arm is formed by sheet metal stamping, the end wall of the support arm is thin and the force is weak, resulting in low stability when the opening is connected to the inner cylinder. At the same time, when the first through hole deviates from the stamping position, the position of the first fixing hole can be fine-tuned. At this time, since the inner diameter is larger than the inner diameter of the first fixing hole, the first fixing hole has a certain position adjustment margin, avoiding direct adjustment of the support arm. Instead, the first positioning block can be adjusted with a small adjustment force, which can reduce costs. After the first fixing hole and the corresponding positions on the edge of the inner tube are aligned, the first fixing part passes through the first through hole to connect the first fixing hole and the edge of the inner tube. Thereafter, batch manufacturing can be carried out according to this, thereby solving the defects caused by the sheet metal stamping process when making the support arm, realizing the split structural design of the tripod, improving the quality of the tripod and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of assembling an inner cylinder and a tripod according to some embodiments is shown.

[0020] Figure 2 A schematic diagram of the rear side structure of the bottom of the inner cylinder according to some embodiments is shown.

[0021] Figure 3 A schematic structural diagram of a tripod according to some embodiments is shown.

[0022] Figure 4 An exploded schematic diagram of a tripod is shown in accordance with some embodiments.

[0023] Figure 5 A schematic diagram of assembling the support arm, the first positioning block, and the second positioning block according to some embodiments is exemplarily shown.

[0024] Figure 6 A schematic structural diagram of a support arm according to some embodiments is exemplarily shown.

[0025] Figure 7 A schematic structural diagram of a support arm from another perspective according to some embodiments is exemplarily shown.

[0026] Figure 8 A schematic structural diagram of a first positioning block according to some embodiments is exemplarily shown.

[0027] Figure 9 A schematic structural diagram of the first positioning block from another perspective according to some embodiments is exemplarily shown.

[0028] Figure 10 A schematic structural diagram of a second positioning block according to some embodiments is exemplarily shown.

[0029] Figure 11 A schematic structural diagram of a second positioning block from another perspective according to some embodiments is exemplarily shown.

[0030] Description of reference numerals:

[0031] Inner cylinder 1, cylinder edge 10, accommodating groove 11, tripod 2, support arm 21, bottom wall 210, side wall 211, end wall 212, groove 213, first through hole 214, first positioning portion 215, third fixing hole 216, second through hole 217, second positioning portion 218, fifth fixing hole 219, rotating shaft 22, first positioning block 23, first fixing hole 230, first recess 231, second fixing hole 232, second fixing member 233, second positioning block 24, positioning pin 240, second recess 241, fourth fixing hole 242, rib plate 243, reinforcing rib 25, side wing 26, reinforcing portion 260, sleeve 27. DETAILED DESCRIPTION

[0032] In order to make the purpose and implementation of this application clearer, the exemplary implementation of this application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only part of the embodiments of this application, not all of the embodiments.

[0033] It should be noted that the brief description of the terms in this application is only for the convenience of understanding the following described embodiments, rather than intending to limit the embodiments of this application. Unless otherwise specified, these terms should be understood in their ordinary and common meanings.

[0034] In this application, terms such as "first", "second", "third", etc. in the specification, claims and the above-mentioned drawings are used to distinguish similar or homogeneous objects or entities, and do not necessarily mean to limit a specific order or sequence, unless otherwise noted. It should be understood that such terms can be interchanged under appropriate circumstances.

[0035] The terms "comprising" and "having" and any variations thereof are intended to cover but not exclusively include. For example, a product or device comprising a series of components does not necessarily have to be limited to all the components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0036] In the related art, a tripod includes a rotating shaft located at the center and three support arms circumferentially spaced along the rotating shaft. One end of the support arm away from the rotating shaft is fixed to the edge of the inner cylinder by screws. The tripod itself is formed by casting aluminum technology. Limited by the characteristics of casting aluminum technology, the tripod has an integral design structure in terms of structure. However, typical defects such as pores, sand holes, cracks and segregation in this technology can never be completely cured, resulting in a high cost of the tripod and great potential quality hazards in long-term use.

[0037] If the support arms are formed independently by sheet metal stamping technology, since sheet metal stamping technology is a cold stamping technology, it has less pollution and no such defects as casting aluminum forming. Moreover, the stability of the parts is high and the cost is also low, which can greatly improve the quality of the tripod. However, due to the difficulty in ensuring the punching position accuracy of sheet metal stamping, it is easy to fail to dock when fixedly connecting with the inner cylinder, resulting in a low yield rate. And the support arm is directly stamped and stretched from the sheet material. One end of the support arm away from the rotating shaft is a thin wall. If holes are directly drilled and connected to the inner cylinder by screws, the force received is weak and the connection stability is low. The above technical problems have led to the tripod being unable to be manufactured by sheet metal stamping technology for a long time. To solve this problem, this application particularly proposes a drum washing machine.

[0038] For the convenience of understanding, when the drum washing machine is placed upright on the ground, the side direction facing the user and where the user operates is defined as the front side direction of the drum washing machine, and the direction facing away from the user of the drum washing machine is defined as the rear side direction of the drum washing machine.

[0039] Figure 1 Shows an assembly schematic diagram of the inner cylinder and the tripod according to some embodiments. Figure 2 Shows a schematic diagram of the rear side structure of the bottom of the inner cylinder according to some embodiments.

[0040] See Figure 1 and Figure 2 , a drum washing machine, which includes a cabinet (not shown in the figure), a drum and a tripod 2. Among them, the cabinet encloses a cylindrical shape extending vertically, and the whole is rectangular. Of course, it can also be other shapes, such as circular, which is not limited here. A base may be provided at the bottom of the cabinet to support the cabinet, and components such as feet protruding downward and contacting the ground are installed on the base, so that there is a certain gap between the whole base and the ground.

[0041] The drum is arranged in the cabinet. A washing cavity is formed inside the drum, and clothes are placed in the washing cavity during washing for washing clothes. Specifically, the drum includes an outer drum (not shown in the figure) arranged in the cabinet and an inner drum 1 arranged in the outer drum. The inner drum 1 is rotatable relative to the outer drum, and there is a certain interval between the inner drum 1 and the outer drum to form a water-containing cavity. Water passing holes communicating with the water-containing cavity are provided on the inner peripheral wall of the inner drum 1, and a drain port is provided at the bottom of the outer drum. The washing water in the inner drum 1 can be discharged to the outer drum through the water passing holes, and the washing water is discharged from the washing machine through a drain pipe assembly connected to the drain port at the bottom of the outer drum. The internal cavity of the inner drum 1 constitutes the washing cavity. In this embodiment, the openings of the drum body and the cabinet are provided on the front side thereof, and the rotation axis of the drum body is arranged in the horizontal direction.

[0042] In this embodiment, a drum edge 10 is formed by extending the bottom of the inner drum 1 backward. The drum edge 10 protrudes from the bottom of the inner drum 1. The tripod 2 is arranged at the bottom of the inner drum 1. A receiving groove 11 matching the shape of the tripod 2 is formed at the bottom of the inner drum 1. The tripod 2 is located in the receiving groove 11. The receiving groove 11 can be formed by protruding from the bottom of the inner drum 1 toward the front side direction. A convex part is correspondingly formed inside the inner drum 1. This convex part can rub against the clothes when washing clothes, and at the same time, the above-mentioned water passing holes can be provided at the position of the convex part to accelerate the exchange of washing water between the inner drum 1 and the outer drum.

[0043] Figure 3 Shows a schematic structural diagram of a tripod according to some embodiments. Figure 4 Shows an exploded view of a tripod according to some embodiments.

[0044] Continue to refer to Figure 3 and Figure 4 , in this embodiment, the tripod 2 includes a rotating shaft 22 and at least three support arms 21. The at least three support arms 21 are circumferentially spaced apart along the rotating shaft 22, and one end of the support arm 21 is fixedly connected to the rotating shaft 22. It can be understood that the rotating shaft 22 is located at the center of the tripod 2 and also at the center of the bottom of the inner drum 1. The support arm 21 is fixedly connected to the bottom of the inner drum 1, so that the tripod 2 is fixedly connected to the inner drum 1 to be able to drive the inner drum 1 to rotate. Among them, the rotating shaft 22 is connected to the driving mechanism of the washing machine to achieve the purpose of driving the inner drum 1 to rotate through the tripod 2. As for how the driving mechanism drives the rotating shaft 22 and the inner drum to rotate belongs to the prior art and will not be elaborated here.

[0045] In this embodiment, preferably three support arms 21 are provided. The three support arms 21 are evenly distributed at intervals along the circumferential direction of the rotating shaft 22, and the included angle between adjacent support arms 21 is 120°. In this way, while maintaining a stable connection with the inner cylinder 1, the number of support arms 21 can be reduced, and the influence on the bottom structure of the inner cylinder 1 can be reduced. Of course, in some embodiments, the number of support arms 21 can also be four or more.

[0046] Figure 5 An exemplary assembly diagram of the support arm, the first positioning block, and the second positioning block according to some embodiments is shown. Figure 6 An exemplary structural diagram of the support arm according to some embodiments is shown. Figure 7 An exemplary structural diagram of the support arm from another perspective according to some embodiments is shown.

[0047] Continue to refer to Figures 5 to 7 , in this embodiment, each support arm 21 is independently manufactured. After manufacturing, it is assembled and fixed with the rotating shaft 22 to form a complete tripod 2. Specifically, the support arm 21 includes a bottom wall 210, side walls 211 extending from opposite ends of the bottom wall 210 in a direction away from the inner cylinder 1, and end walls 212 connecting the bottom wall 210 and the two side walls 211. The end walls 212 are located at one end of the bottom wall 210 away from the rotating shaft 22. A groove 213 is formed by enclosing the outer periphery of the bottom wall 210, the two side walls 211, the end walls 212, and the rotating shaft 22. That is to say, one end of the support arm 21 connected to the rotating shaft 22 is fixedly connected to the outer periphery of the rotating shaft 22 by the bottom wall 210 and the two side walls 211, and the end walls 212 form two groove walls of the groove 213 with the outer periphery of the rotating shaft 22 at one end of the bottom wall 210 away from the rotating shaft 22. During manufacturing, cold-rolled steel plates can be used as the base material, and the support arm 21 can be obtained by stamping and stretching through sheet metal working.

[0048] In this embodiment, the support arm 21 is fixed to the rotating shaft 22 by welding. By using the welding method to fix the support arm 21 and the rotating shaft 22, the connection problem during the assembly of the split structure can be solved, and the strength after connection can be ensured. Moreover, the operation is relatively convenient, and no structural changes need to be made to the rotating shaft 22 and the support arm 21. It can be understood that one end of the bottom wall 210 and the two side walls 211 close to the rotating shaft 22 are welded to the outer periphery of the rotating shaft 22 along their contours.

[0049] In some embodiments, the support arm 21 can also be connected and fixed to the outer periphery of the rotating shaft 22 by mortise-and-tenon joints. For example, a tenon is provided at one end of the support arm 21 close to the rotating shaft 22, and a mortise is provided at the corresponding position on the rotating shaft 22. The two are docked to fixedly connect the support arm 21 and the rotating shaft 22, and the connection between the two is stable when the inner cylinder 1 rotates.

[0050] Figure 8A schematic structural diagram of a first positioning block according to some embodiments is exemplarily shown. Figure 9 A schematic structural diagram of the first positioning block from another perspective according to some embodiments is exemplarily shown.

[0051] Continue to see Figure 8 and Figure 9 The first fixing member 212 is fixed to the inner tube 1 by the first fixing member 230, and the first through-hole 214 is fixed to the inner tube 1 by the first fixing member 23.

[0052] At the same time, in this embodiment, the inner diameter of the first through hole 214 is larger than the inner diameter of the first fixing hole 230, which can solve the problem of poor accuracy of the punching position of the forming side when the sheet metal stamping supports the arm 21. At this time, the first through hole 214 does not play the role of fixed connection. When the first through hole 214 deviates from the stamping position, the position of the first fixing hole 230 can be fine-tuned. At this time, since the inner diameter of the first through hole 214 is larger than the inner diameter of the first fixing hole 230, the first fixing hole 230 has a certain position adjustment margin, avoiding direct adjustment of the support arm 21. Instead, the first positioning block 23 can be adjusted with a small adjustment force, which can reduce costs. After the first fixing hole 230 and the corresponding position on the edge of the inner tube 1 are aligned, the first fixing part passes through the first through hole 214 to connect the first fixing hole 230 and the edge of the inner tube 1. After that, batch manufacturing can be carried out according to this.

[0053] In summary, by providing the first positioning block 23 and providing the first fixing hole 230 on the first positioning block 23, the connection between the support arm 21 and the inner tube 1 is achieved through the first fixing hole 230, which solves the technical problems existing in the sheet metal stamping process, making it feasible to use sheet metal stamping to manufacture each support arm 21 of the tripod 2 separately, thereby avoiding the various defects caused by the use of cast aluminum integrated manufacturing, greatly improving the quality of the tripod 2 and reducing the cost of the tripod 2.

[0054] In this embodiment, considering the punching error in stamping forming and the designed opening size, the inner diameter of the first through hole 214 is 3 mm to 5 mm larger than the inner diameter of the first fixing hole 230. Within this range, by adjusting the position of the first fixing hole 230 on the first positioning block 23, the requirement that the first fixing member is fixed to the barrel wall of the inner barrel 1 through the first fixing hole 230 can be met. For example, the inner diameter of the first through hole 214 is 3 mm, 4 mm or 5 mm larger than the inner diameter of the first fixing hole 230, etc.

[0055] It should be noted that in this embodiment, mounting holes are provided at positions corresponding to the support arms 21 on the barrel wall of the inner barrel 1. The specific positions of the mounting holes correspond to the first fixing holes 230. In this way, when the support arms 21 and the inner barrel 1 are fixedly connected, the first fixing member passes through the mounting holes, the first through holes 214 and the first fixing holes 230 to firmly connect the support arms 21 and the inner barrel 1 together. It can be understood that the first fixing member can be a screw fastener, and the first fixing hole 230 can be a threaded hole. The head of the screw fastener is located outside the mounting hole, and its rod part extends into the mounting hole, the first through hole 214 and the first fixing hole 230, so as to be screwed with the first positioning block 23 to fixedly connect the support arms 21 and the inner barrel 1.

[0056] In some embodiments, the first fixing member can be a rivet, which is riveted on the mounting holes, the first through holes 214 and the first fixing holes 230, and the barrel wall of the inner barrel 1, the support arms 21 and the first positioning block 23 are riveted and fixed.

[0057] In this embodiment, the bottom wall portion bulges towards the direction away from the inner barrel 1 to form a first positioning portion 215. The first positioning portion 215 can be formed by the bottom wall itself bulging towards the direction away from the inner barrel 1. At this time, a concave cavity is formed at the position of the bottom wall corresponding to the first positioning portion 215 in the direction towards the inner barrel 1. After the overall laminate-shaped bottom wall is processed like this, the structural strength is improved at the first positioning portion 215. Among them, the first positioning portion 215 can be formed by stamping towards the direction away from the inner barrel 1 through a sheet metal stamping process. In some embodiments, it can also be that the first positioning portion 215 is formed by the surface of the bottom wall facing away from the inner barrel 1 bulging, and the thickness of the bottom wall corresponding to the positioning portion is thicker than that at other positions, which can also play a role in strengthening the structure.

[0058] Correspondingly, the first positioning block 23 is formed with a first concave portion 231 corresponding to the first positioning portion 215. The first concave portion 231 and the first positioning portion 215 are butted through an uneven surface, so as to be able to position the first positioning block 23. When setting, just buckle the first concave portion 231 on the first positioning portion 215, and the installation efficiency can be improved whether it is manual installation or automated installation.

[0059] Further, second fixing holes 232 and third fixing holes 216 are respectively provided at corresponding positions of the first positioning block 23 and the first positioning portion 215. The second fixing holes 232 and the third fixing holes 216 are opposite to each other. The first positioning block 23 is fixedly connected to the bottom wall through a second fixing member 233 passing through the second fixing holes 232 and the third fixing holes 216, so as to fixedly connect the first positioning block 23 and the support arm 21. It can be understood that the second fixing member 233 can be a rivet, riveted to the second fixing holes 232 and the third fixing holes 216, and the first positioning block 23 and the bottom wall are riveted and fixed. The second fixing member 233 can also be a screw, and the second fixing holes 232 and the third fixing holes 216 are screw holes, and the first positioning block 23 and the bottom wall are screwed and fixed. It should be noted that by arranging the second fixing holes 232 at positions corresponding to the first positioning portion 215, the advantage of the large structural strength of the first recess 231 can be utilized, so that the connection of the second fixing member 233 is more stable. And since a concave cavity is formed at the position of the bottom wall corresponding to the first positioning portion 215, after the second fixing member 233 passes through the second fixing holes 232 and the third fixing holes 216, it can be received in the concave cavity, avoiding protruding from the side of the bottom wall facing the inner cylinder 1 and interfering with the connection relationship between the bottom wall and the inner cylinder 1.

[0060] In some embodiments, there may be at least two mounting holes provided on the cylinder side of the inner cylinder 1 corresponding to one support arm 21, and the two are spaced circumferentially along the inner cylinder 1. Correspondingly, there are at least two first through holes 214 provided on the end wall 212 and at least two first fixing holes 230 provided on the first positioning block 23. By providing at least two, the connection strength can be enhanced, making the connection between the support arm 21 and the inner cylinder 1 more stable. The second fixing holes 232 and the third fixing holes 216 are respectively provided with at least two at intervals along the length direction of the support arm 21, and the second fixing holes 232 are located between the two first fixing holes 230, and there is no interference between the first fixing holes 230 and the second fixing holes 232, without affecting their respective connection strengths. In this embodiment, two mounting holes, first fixing holes 230, second fixing holes 232 and third fixing holes 216 are all provided.

[0061] Figure 10 Exemplarily shows a schematic structural view of a second positioning block according to some embodiments. Figure 11 Exemplarily shows a schematic structural view of the second positioning block from another perspective according to some embodiments.

[0062] Continue to refer to Figure 10 and Figure 11, in some embodiments, a second positioning block 24 is further provided in the groove 213. The second positioning block 24 is fixedly connected to the bottom wall 210. A second through hole 217 is formed in the bottom wall 210 at a position corresponding to the second positioning block 24. A positioning pin 240 is provided on the second positioning block 24. The positioning pin 240 passes through the second through hole 217. By providing the positioning pin 240, when assembling the inner cylinder 1 and the tripod 2 on an automated production line, the support arm 21 is positioned by the positioning pin 240, so as to facilitate aligning the tripod 2 and the inner cylinder 1, so as to facilitate the fixed connection between the inner cylinder 1 and the tripod 2.

[0063] It can be understood that since the support arm 21 is made by a sheet metal stamping process, the hole accuracy on the forming surface of the support arm 21 is inaccurate. If a positioning hole is directly formed in the support arm 21 for the fixture on the automated production line to position the support arm 21, it may cause the fixture to be unable to position the support arm 21, so that the support arm 21 cannot be assembled with the inner cylinder 1.

[0064] Therefore, in this embodiment, a second through hole 217 is formed in the bottom wall at a position corresponding to the second positioning block 24. By providing the second positioning block 24 in the groove 213 and providing the positioning pin 240 on the second positioning block 24, the positioning pin 240 passes through the second through hole 217 to play a positioning role. At the same time, the inner diameter of the second through hole 217 is larger than the outer diameter of the positioning pin 240, so that the positioning pin 240 has a certain adjustment margin in the second through hole 217. When the position of the second through hole 217 deviates due to the stamping forming, the position of the positioning pin 240 can be adjusted slightly. Instead of directly adjusting the support arm 21, the second positioning block 24 can be adjusted. The adjustment force is small and the cost can be reduced. After the included angle between the positioning pin 240 and the fixture is aligned, the second positioning block 24 can be mass-produced according to this thereafter. Thus, the tripod 2 and the inner cylinder 1 can be automatically assembled by an automated production line, avoiding manual assembly of the tripod 2 and the inner cylinder 1 and improving the production and manufacturing efficiency.

[0065] In this embodiment, considering the punching error in the stamping forming and the designed opening size, the inner diameter of the second through hole 217 is 3-5 mm larger than the outer diameter of the positioning pin 240. Within this range, by adjusting the position of the positioning pin 240 on the second positioning block 24, it can be ensured that the positioning pin 240 can be aligned with the fixture on the automated production line after fine-tuning the position. For example, the inner diameter of the second through hole 217 is 3 mm, 4 mm or 5 mm larger than the outer diameter of the positioning pin 240, etc.

[0066] In this embodiment, the bottom wall portion protrudes toward the direction away from the inner cylinder 1 to form a second positioning portion 218. The second positioning portion 218 can be formed by the bottom wall itself protruding toward the direction away from the inner cylinder 1. At this time, a concave cavity is formed at the position of the bottom wall corresponding to the second positioning portion 218 in the direction toward the inner cylinder 1. After the overall laminate bottom wall is processed in this way, the structural strength is improved at the second positioning portion 218. Among them, the second positioning portion 218 can be formed by stamping in the direction away from the inner cylinder 1 through a sheet metal stamping process. In some embodiments, the second positioning portion 218 can also be formed by the surface of the bottom wall away from the inner cylinder 1 protruding, and the thickness of the bottom wall corresponding to the second positioning portion 218 is thicker than that at other positions, which can also play a role in strengthening the structure. It can be understood that the second positioning portion 218 is closer to the rotating shaft 22 than the first positioning portion 215, and both are formed by the portions at different positions of the bottom wall 210 protruding toward the direction away from the inner cylinder 1.

[0067] Correspondingly, the second positioning block 24 is formed with a second concave portion 241 corresponding to the second positioning portion 218. The second concave portion 241 and the second positioning portion 218 are docked through an uneven surface, so as to be able to position the second positioning block 24. When setting, the second concave portion 241 can be buckled on the second positioning portion 218, and the installation efficiency can be improved whether it is manually installed or automatically installed.

[0068] Furthermore, a fourth fixing hole 242 and a fifth fixing hole 219 are respectively provided at the corresponding positions of the second positioning block 24 and the second positioning portion 218. The fourth fixing hole 242 and the fifth fixing hole 219 are opposite to each other. The second positioning block 24 is fixedly connected to the bottom wall 210 through a third fixing member passing through the fourth fixing hole 242 and the fifth fixing hole 219, so that the second positioning block 24 and the support arm 21 are fixedly connected. It can be understood that the third fixing member can be a rivet, riveted to the fourth fixing hole 242 and the fifth fixing hole 219, and the second positioning block 24 and the bottom wall are riveted and fixed. The third fixing member can also be a screw, and the fourth fixing hole 242 and the fifth fixing hole 219 are screw holes, and the second positioning block 24 and the bottom wall are screwed and fixed. It should be noted that by setting the fourth fixing hole 242 at the position corresponding to the second positioning portion 218, the advantage of the large structural strength of the second concave portion 241 can be utilized, so that the connection of the third fixing member is more stable. And since a concave cavity is formed at the position of the bottom wall corresponding to the second positioning portion 218, after the third fixing member passes through the fourth fixing hole 242 and the fifth fixing hole 219, it can be received in the concave cavity, avoiding protruding from the surface of the bottom wall facing the inner cylinder 1 and interfering with the connection relationship between the bottom wall and the inner cylinder 1.

[0069] In some embodiments, a plurality of rib plates 243 are further provided on a side of the second positioning block 24 facing away from the bottom wall 210. The plurality of rib plates 243 are arranged at intervals along the length direction of the support arm 21, and the rib plates 243 extend along the width direction of the support arm 21 to be connected to more than two side walls 211. The fourth fixing hole 242 is located between two rib plates. The plurality of rib plates 243 can strengthen the structural strength of the second positioning block 24 and share the acting force when the third fixing member is fixedly connected to the fourth fixing hole 242.

[0070] In some embodiments, there may be two positioning pins 240. The fourth fixing hole 242 is arranged between the two positioning pins 240. The third fixing member is a bolt fastener. The bolt fastener fixedly connects the second positioning block 24 and the bottom wall 210 through the fourth fixing hole 242 and the fifth fixing hole 219.

[0071] In some embodiments, a part of the bottom wall 210 bulges towards a direction away from the inner cylinder 1 to form a reinforcing rib 25. The reinforcing rib 25 extends along the length direction of the support arm 21, thereby strengthening the structural strength of the support arm 21 by means of the reinforcing rib 25. The reinforcing rib 25 can be formed by the bottom wall protruding towards a direction away from the inner cylinder 1 itself. At this time, a concave cavity is formed at a position corresponding to the reinforcing rib 25 on the side of the bottom wall facing the inner cylinder 1. One end of the reinforcing rib 25 can extend to be engaged with the second positioning portion 218, and the other end extends to a position close to the rotating shaft 22, so that most of the support arm 21 is structurally strengthened.

[0072] In some embodiments, the support arm 21 further includes a flank 26 extending outward from an end of the side wall 211 facing away from the bottom wall 210. The outward extension of the flank 26 means extending towards a direction away from the center of the groove 213. The two flanks 26 extend in opposite directions. In this way, when stamping and stretching the sheet material, the flank 26 is used for feeding the material to form the support arm 21 having the structure of the groove 213. A plurality of reinforcing portions 260 are arranged at intervals along the length direction of the support arm 21 at the joint of the flank 26 and the side wall 211. The reinforcing portions 260 protrude towards the inner cylinder 1 direction, so as to strengthen the connection strength between the flank 26 and the side wall 211 and improve the overall strength of the support arm 21. It can be understood that the reinforcing portion 260 can be formed by the joint of the side wall 211 and the flank 26 protruding towards the inner cylinder 1 itself.

[0073] Among them, the ends of the flanks 26 extending from the opposite side walls 211 of two adjacent support arms 21 close to the rotating shaft 22 abut against each other, so that the three support arms 21 form a whole, and can be fixed by welding at the abutting position, thereby improving the connection strength between the support arms 21.

[0074] In some embodiments, a bushing 27 is also sleeved on the rotating shaft 22. When the rotating shaft 22 is connected to the driving mechanism, the bushing 27 plays a role in sealing and limiting. When forming the rotating shaft 22 and the bushing 27, the base material can be first upset by forging, and then the required dimensions of the rotating shaft 22 and the bushing 27 can be machined. Finally, the two are press-fitted together by a press-fitting process. This forming method can use a base material with a size smaller than the finished product, achieving cost reduction.

[0075] In some embodiments, since it is made by sheet metal stamping forming process and can be made using a steel plate as the base material, after the support arm 21 and the rotating shaft 22 are fixedly connected to form a complete tripod 2, the entire tripod 2 can be coated with a protective layer on the surface of the tripod 2 through an electrophoresis process, solving the problem of surface corrosion that occurs after long-term use of existing cast aluminum formed parts.

[0076] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0077] In the present application, unless otherwise clearly specified and limited, terms such as "assembly" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the description of this specification, the descriptions referring to terms such as "some embodiments" and "exemplarily" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0078] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application. Therefore, any changes or modifications made in accordance with the claims and the specification of the present application shall fall within the scope covered by the patent of the present application.

Claims

1. A drum washing machine, characterized in that, Comprising: A box body; An inner cylinder, disposed in the box body; A tripod, disposed at the bottom of the inner cylinder, the tripod includes a rotating shaft and at least three support arms, the at least three support arms are circumferentially spaced apart along the rotating shaft, and one end of the support arm is fixedly connected to the rotating shaft; wherein, the support arm includes a bottom wall, side walls extending from opposite ends of the bottom wall in a direction away from the inner cylinder, and end walls connecting the bottom wall and the two side walls, the end walls are located at one end of the bottom wall away from the rotating shaft, the bottom wall, the two side walls, the end walls and the outer periphery of the rotating shaft enclose a groove, a first positioning block is fixedly provided in the groove, one end of the first positioning block away from the rotating shaft is attached to the end wall, a first fixing hole and a first through hole are respectively formed at corresponding positions on the end wall of the first positioning block away from the rotating shaft, the inner diameter of the first through hole is larger than the inner diameter of the first fixing hole, and the support arm is fixedly connected to the barrel edge of the inner cylinder by a first fixing member passing through the first fixing hole and the first through hole.

2. The drum washing machine according to claim 1, wherein A part of the bottom wall bulges in a direction away from the inner cylinder to form a first positioning portion, the first positioning block is correspondingly formed with a first concave portion for the first positioning portion, the first concave portion is docked with the first positioning portion, second fixing holes and third fixing holes are respectively provided at corresponding positions of the first positioning block and the first positioning portion, and the first positioning block is fixedly connected to the bottom wall by a second fixing member passing through the second fixing hole and the third fixing hole.

3. The drum washing machine according to claim 2, wherein Two of the first fixing holes are spaced apart along the width direction of the support arm on the first positioning block, and two of the second fixing holes are spaced apart along the length direction of the support arm on the first positioning block, and the two second fixing holes are located between the two first fixing holes.

4. The drum washing machine according to claim 1, wherein A second positioning block is further provided in the groove, the second positioning block is fixedly connected to the bottom wall, a second through hole is formed at a position corresponding to the second positioning block on the bottom wall, a positioning pin is provided on the second positioning block, and the positioning pin passes out of the second through hole, and the inner diameter of the second through hole is larger than the outer diameter of the positioning pin.

5. The drum washing machine according to claim 1, wherein The inner diameter of the first through hole is 3 mm to 5 mm larger than the inner diameter of the first fixing hole.

6. The drum washing machine according to claim 4, wherein A part of the bottom wall bulges in a direction away from the inner cylinder to form a second positioning portion, the second positioning block is correspondingly formed with a second concave portion for the second positioning portion, and the second concave portion is docked with the second positioning portion.

7. The drum washing machine according to claim 6, wherein A fourth fixing hole and a fifth fixing hole are respectively provided at corresponding positions of the second positioning block and the second positioning portion, and the second positioning block is fixedly connected to the bottom wall through a third fixing member passing through the fourth fixing hole and the fifth fixing hole; the second through hole is opened on the second positioning portion, and the positioning pin is arranged at a corresponding position on the second recess.

8. The drum washing machine according to claim 1, characterized in that: The bottom wall portion protrudes in a direction away from the inner cylinder to form a reinforcing rib, and the reinforcing rib extends along the length direction of the support arm.

9. The drum washing machine according to claim 1, characterized in that: The support arm also includes a side wing extending outward from one end of the side wall away from the bottom wall, and a plurality of reinforcing parts are provided at intervals along the length direction of the support arm at the junction of the side wing and the side wall, and the reinforcing parts protrude toward the inner cylinder.

10. The drum washing machine according to claim 1, characterized in that: The support arm is fixed on the rotating shaft by welding.

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