A spray arm mechanism and dishwasher thereof

Abstract

The present invention discloses a spray arm mechanism and a dishwasher thereof, the spray arm mechanism comprising: a first spray arm, comprising a main spray arm and an active member, the active member being fixedly connected to the middle of the top of the main spray arm; two second spray arms, arranged above the main spray arm and respectively located on the left and right outer sides of the active member, the second spray arm comprising an auxiliary spray arm and a driven member, the driven member being fixedly connected to the auxiliary spray arm; and a transmission assembly, the active member being respectively transmission-connected to the driven members of the two second spray arms through the transmission assembly. The spray arm mechanism of the present invention increases the flushing angle, enriches the spraying mode, and effectively improves the cleaning effect of the dishwasher.

Description

Technical Field

[0001] The present invention relates to the technical field of dishwashers, and in particular to a spray arm mechanism and a dishwasher thereof. Background Art

[0002] Household dishwashers usually use the flushing effect of spray water columns, combined with auxiliary means such as washing consumables and heating, to clean the contaminants on tableware. However, the water pressure in the middle water channel of existing dishwashers is low, and the middle spray arm of the dishwasher mostly adopts a single circular spray mode, with only a single flushing angle and position. At the same time, there are many dead corners that cannot be flushed, such as the inner wall of a higher depth container. Summary of the invention

[0003] The present invention aims to solve at least one of the problems existing in the prior art to a certain extent, and for this purpose, the present invention proposes a spray arm mechanism to increase the flushing angle, enrich the spraying mode, and effectively improve the cleaning effect of the dishwasher. The present invention also proposes a dishwasher.

[0004] According to the above-mentioned spray arm mechanism, it is realized by the following technical solution:

[0005] A spray arm mechanism comprises: a first spray arm, comprising a main spray arm and an active member, the main spray arm is provided with a first water inlet and a plurality of first spray holes, the active member is fixedly connected to the middle part of the top of the main spray arm; two second spray arms are arranged above the main spray arm and are respectively located on the left and right outer sides of the active member, the second spray arm comprises an auxiliary spray arm and a driven member, the auxiliary spray arm is provided with a second water inlet and a plurality of second spray holes, the driven member is fixedly connected to the auxiliary spray arm; and a transmission assembly, the active member is transmission-connected to the driven members of the two second spray arms respectively through the transmission assembly.

[0006] In some embodiments, the active member is a first turntable, and a variable pitch spiral rib arranged along the circumferential direction is provided on the side of the first turntable facing away from the main spray arm; the driven member is a second gear; the transmission assembly includes a connecting rod, a connecting gear and two first gears, the connecting rod is arranged on the side of the first turntable facing away from the main spray arm, the connecting gear is fixedly connected to the middle part of the connecting rod and meshed with the variable pitch spiral rib, the two first gears are respectively fixedly connected to the left and right ends of the connecting rod, and are respectively meshed with the second gears of the two second spray arms.

[0007] In some embodiments, the number of windings of the variable pitch spiral rib is greater than 1000 circles; the connecting gear has gear teeth evenly arranged along its circumferential direction, and the distance between two adjacent windings is n times the arc length between two adjacent gear teeth.

[0008] In some embodiments, the variable pitch spiral ribs are uniformly variable pitch at equal angles, and / or n is 1-5.

[0009] In some embodiments, the active member is a second turntable, and a threaded portion spiraling upward along the outer wall of the second turntable is protruded from the outer wall of the second turntable; the driven member is a second gear; the transmission assembly includes a connecting rod and two first gears, and the connecting rod is arranged outside the front or rear side of the first turntable, and a protrusion evenly spaced along its circumferential direction is protruded from the middle outer surface of the connecting rod, and the protrusion is meshed with the threaded portion, and the two first gears are respectively fixedly connected to the left and right ends of the connecting rod, and are respectively meshed with the second gears of the two second spray arms.

[0010] In some embodiments, the number of spiral windings of the threaded portion is greater than 100, and the distance between two adjacent spiral windings is m times the arc length between two adjacent protrusions.

[0011] In some embodiments, the protrusion is cylindrical, and / or m is 1-5.

[0012] In some embodiments, the active member is a turbine; the driven member is a second gear; the transmission assembly includes a connecting rod, a worm and two first gears, the connecting rod is arranged outside the front or rear side of the turbine, the worm is fixedly connected to the middle part of the connecting rod and meshes with the turbine, and the two first gears are respectively fixedly connected to the left and right ends of the connecting rod, and are respectively meshed with the second gears of the two second spray arms.

[0013] In some embodiments, a transmission ratio between the turbine and the worm is 10-20.

[0014] In some embodiments, the rotation axis of the main spray arm and the rotation axis of the auxiliary spray arm are perpendicular to each other; and / or the angle range between the direction of the first spray hole and the rotation plane of the first spray arm is 40-90°, and the angle range between the direction of the second spray hole and the rotation plane of the second spray arm is 0-50°.

[0015] In some embodiments, a water pipe assembly is also included, which includes a main water pipe and two water connecting pipes, the water inlet ends of the two water connecting pipes are connected or not connected to the water inlet end of the main water pipe; the main spray arm is rotatably connected to the water outlet end of the main water pipe, and the first water inlet is connected to the water outlet end of the main water pipe; the two auxiliary spray arms are respectively rotatably connected to the water outlet ends of the two water connecting pipes, and the second water inlet of the auxiliary spray arm is connected to the water outlet end of the corresponding water connecting pipe.

[0016] According to the above-mentioned dishwasher, it is realized by the following technical solution:

[0017] A dishwasher comprises a bowl basket assembly, a connecting assembly and a spray arm mechanism as described above, wherein the bowl basket assembly is arranged on the top of the spray arm mechanism, the bowl basket assembly is respectively connected to two auxiliary spray arms through the connecting assembly, and the auxiliary spray arms can rotate relative to the connecting assembly.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The spray arm mechanism of the present invention connects and fixes an active part on a main spray arm, and two second spray arms are arranged in parallel and in the same direction on the left and right outer sides of the active part. The active part is connected to the two second spray arms through a transmission assembly, so that the main spray arm can simultaneously link the two second spray arms. With the cooperation of the first spray arm and the two second spray arms, the flushing angle can be increased, the spraying mode can be enriched, and the cleaning effect of the dishwasher can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the spray arm mechanism in Embodiment 1 of the present invention;

[0021] Figure 2 is an exploded view of the spray arm mechanism in Example 1 of the present invention;

[0022] Figure 3 is a schematic structural diagram of the first rotating disk in Embodiment 1 of the present invention;

[0023] Figure 4 is a top view of the first rotating disk in Example 1 of the present invention;

[0024] Figure 5 is an exploded view of a cross-sectional view of the second spray arm in Embodiment 1 of the present invention;

[0025] Figure 6 is an exploded view of a cross-sectional view of a transmission assembly in Embodiment 1 of the present invention;

[0026] Figure 7 is a schematic diagram of connecting gears and transition sections in Example 1 of the present invention;

[0027] Figure 8 is a structural schematic diagram of a bowl-basket assembly and a spray arm mechanism in Embodiment 1 of the present invention;

[0028] Fig. 9 is a schematic structural diagram of the spray arm mechanism in Embodiment 2 of the present invention;

[0029] Fig.10 is a schematic structural diagram of the second rotating disk in Embodiment 2 of the present invention;

[0030] Fig.11 is a cross-sectional view of the second rotating disk in Embodiment 2 of the present invention;

[0031] Fig.12 is an exploded view of a cross-sectional view of a transmission assembly in Embodiment 2 of the present invention;

[0032] Fig.13 is a cross-sectional view of the transmission assembly in Embodiment 2 of the present invention from another angle;

[0033] Fig.14 is a schematic structural diagram of the spray arm mechanism in Embodiment 3 of the present invention;

[0034] Fig.15 The structure of the turbine in the third embodiment of the present invention is shown in FIG. Figure 1 ;

[0035] Fig.16 is a schematic diagram of the structure of the turbine in Example 3 of the present invention;

[0036] Fig.17 It is an exploded view of the cross-sectional view of the transmission component in Example 3 of the present invention.

[0037] In the figure: 1-first spray arm, 11-main spray arm, 111-first water inlet, 112-first spray hole, 12-rotating disk, 1201-variable pitch spiral rib, 1202-mounting part, 1203-center hole, 1204-grid hole, 1205-air-avoiding part, 121-inner ring, 122-outer ring, 123-connecting rib, 124-reinforcing rib, 13-second rotating disk, 1301-threaded part, 1302-center through hole, 1303-annular positioning column, 1304-mounting boss, 1305-air-avoiding hole, 1306-reinforcing rib, 131-disc body, 132-outer ring wall, 14-turbine, 141-groove, 142-tooth structure;

[0038] 2-second spray arm, 21-auxiliary spray arm, 2101-second water inlet, 2102-second spray hole, 2103-second flow channel, 2104-annular convex rib, 211-first spray arm body, 212-second spray arm body, 213-connecting pipe, 22-follower;

[0039] 3-water pipe assembly, 31-main water pipe, 311-water outlet, 32-water connecting pipe, 321-water outlet joint;

[0040] 4-shaft assembly, 41-spray arm shaft, 42-spray arm support, 43-gasket;

[0041] 5-connecting assembly, 51-first connecting block, 511-buckle portion, 512-limiting groove, 513-clamping groove;

[0042] 6-transmission assembly, 6101-protrusion, 61-connecting rod, 611-left connecting section, 612-right connecting section, 613-transition section, 62-connecting gear, 621-gear teeth, 63-first gear, 64-worm;

[0043] 7-bowl basket assembly, 711-first bottom steel wire, 712-second bottom steel wire. DETAILED DESCRIPTION

[0044] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0045] Example 1

[0046] refer to Figure 1-2 The present embodiment provides a spray arm mechanism, which includes a first spray arm 1, two second spray arms and a transmission assembly 6. The first spray arm 1 includes a main spray arm 11 and an active member (not shown in the figure). The main spray arm 11 is provided with a first flow channel (not shown in the figure), a first water inlet 111 and a plurality of first spray holes 112. The first flow channel is connected with the plurality of first spray holes 112 through the first flow channel. In the present embodiment, the first water inlet 111 is provided in the middle of the left-right direction of the top of the main spray arm 11. The plurality of first spray holes 112 are all provided at the top of the main spray arm 11 and are arranged at intervals along the length direction of the main spray arm 11. A spray arm rotating shaft 41 arranged vertically and rotatably connected to the main spray arm 11 is provided at the first water inlet 111. The active member is fixedly connected to the middle of the top of the main spray arm 11, and the active member is arranged coaxially with the first water inlet 111, so that the main spray arm 11 can be rotated by the water flow to synchronously drive the active member to rotate, and at the same time, the stability of the rotation of the main spray arm can be prevented from being affected by the setting of the active member.

[0047] The two second spray arms 2 are arranged in parallel and in the same direction above the main spray arm 11 and are respectively located on the left and right outer sides of the active part. The second spray arm 2 includes an auxiliary spray arm 21 and a driven part 22. The auxiliary spray arm 21 is provided with a second flow channel 2103, a second water inlet 2101 and a plurality of second spray holes 2102. The second water inlet 2101 is connected to the plurality of second spray holes 2102 through the second flow channel 2103. The driven part 22 is fixedly connected to the auxiliary spray arm 21. The transmission assembly 6 is arranged on the front side or the rear side of the active part, and the active part is respectively connected to the driven parts 22 of the two second spray arms 2 through the transmission assembly 6. In the present embodiment, the auxiliary spray arm 21 is preferably a circular spray arm, and the two second spray arms 2 and the transmission assembly 6 are enclosed to form an H shape, and the distance between the two second spray arms 2 is greater than the diameter of the active part.

[0048] When the main spray arm 11 rotates under the drive of water flow, it can synchronously drive the active part to rotate. When the active part rotates, it can simultaneously link the two auxiliary spray arms 21 to rotate through the transmission component 6. In this way, under the cooperation of the main spray arm 11 and the two second spray arms 2, the spray water columns formed by the main spray arm 11 and the auxiliary spray arms 21 are crossed, which enriches the spray diversity, increases the flushing angle, and effectively improves the cleaning effect of the dishwasher. In addition, by setting the transmission component 6, the two second spray arms 2 are not limited by the size of the active part, and the rotation force is transmitted to the farther side, which is conducive to further strengthening the spray effect at the four corners of the inner tank.

[0049] refer to Figure 1-3 , the active part is the first rotating disk 12, the first rotating disk 12 is connected and fixed to the top of the first spray arm 11 and is coaxially arranged with the first water inlet 111, and a variable pitch spiral rib 1201 arranged along its circumferential direction is provided on the top of the first rotating disk 12, and the driven part 22 is a second gear. The transmission assembly 6 includes a connecting rod 61, a connecting gear 62 and two first gears 63, and the connecting rod 61 is arranged on the front side or the rear side above the first rotating disk 12. The connecting gear 62 is fixedly connected to the outside of the middle part of the connecting rod 61 and meshes with the variable pitch spiral rib 1201 to form a primary transmission. At this time, the cooperation between the connecting gear 62 and the variable pitch spiral rib 1201 on the top of the first rotating disk 12 can be regarded as a cam mechanism cooperation, and the first rotating disk plays a role in reliably supporting the transmission assembly 6. The two first gears 63 are respectively fixedly connected to the left and right ends of the connecting rod 61, and are respectively meshed with the second gears of the two second spray arms 2 to form two secondary transmissions. In this embodiment, the first gear 63 and the second gear are preferably bevel gears. Thus, a two-stage transmission is formed by the cooperation of the variable pitch spiral rib 1201, the connecting gear 62, the first gear 63 and the second gear, which can transmit the rotational force to a farther side, while further improving the spraying effect at the four corners and further enhancing the cleaning effect.

[0050] refer to Figure 1-7 Specifically, the number of turns of the variable pitch spiral rib 1201 is greater than 1 turn; the connecting gear 62 has gear teeth 621 evenly arranged along its circumferential direction, and the distance Q1Q2 between two adjacent turns is n times the arc length M1M2 between two adjacent gear teeth 621, so that the first rotating disk 12 rotates one circle following the main spray arm 11, and the connecting gear 62 rotates n gear teeth. Special note, refer to Figure 4 , the dotted line P1P2 is a ray on the first rotating disk 12, wherein Q1 and Q2 are the intersection points of the ray and the variable pitch spiral rib 1201, and the distance between Q1Q2 is a specific distance; Figure 7 , the circular dotted line L is the pitch circle on the connecting gear 62 , wherein M1 and M2 are the intersection points of the midpoints of two adjacent gear teeth 621 on the pitch circle of the connecting gear 62 .

[0051] More specifically, the variable pitch spiral rib 1201 is uniformly variable at equal angles, and / or n is 1-5. In this embodiment, the number of turns of the variable pitch spiral rib 1201 is greater than 1 and less than 2, the gear teeth 621 are preferably straight teeth, and n is preferably 1, so that the distance Q1Q2 is equal to the arc length M1M2, at which time the main spray arm 11 drives the first rotating disk 12 to rotate one circle, and the connecting gear 62 rotates one gear tooth.

[0052] refer to Figure 1-2 , the rotation axis of the second spray arm 2 is perpendicular to the rotation axis of the first spray arm 1, specifically, the rotation axis of the main spray arm 11 is perpendicular to the rotation axis of the auxiliary spray arm 21. The angle between the orientation of the first spray hole 112 and the rotation plane of the first spray arm 1 is 40-90°, preferably 45-90°; the angle between the orientation of the second spray hole 2102 and the rotation plane of the second spray arm 2 is 0-50°, preferably 0-45°, so that the spray water columns of the first spray arm 1 and the second spray arm 2 form an intersection, enriching the spray diversity and effectively enhancing the cleaning effect of the dishwasher. It is particularly noted that the rotation plane of the first spray arm 1 is a horizontal plane, which is perpendicular to the rotation axis of the first spray arm 1; the rotation plane of the second spray arm 2 is a vertical plane, and the rotation axis of the second spray arm 2 is perpendicular.

[0053] refer to Figure 1-4 In this embodiment, the first rotating disk 12 is a circular structure, and a center hole 1203 for the rotating shaft assembly 4 to vertically pass through is provided at the center position of the first rotating disk 12. The center hole 1203 is coaxially arranged with the first water inlet 111, and the diameter of the center hole 1203 is smaller than the diameter of the first water inlet 111. At least two mounting portions 1202 are provided on the first rotating disk 12, and the at least two mounting portions 1202 are circumferentially spaced and arranged between the variable pitch spiral rib 1201 and the center hole 1203. Each mounting portion 1202 is fixedly connected to the main spray arm 11 through a connecting piece (such as a screw), a snap structure or other connecting structure, so as to realize the fixed installation of the first rotating disk 12 on the top of the main spray arm 11.

[0054] The first rotating disk 12 includes an inner ring 121, an outer ring 122 and a plurality of connecting ribs 123. The outer ring 122 is arranged outside the inner ring 121. The plurality of connecting ribs 123 are arranged between the inner ring 121 and the outer ring 122 at intervals in the circumferential direction. The opposite ends of the connecting ribs 123 in the radial direction are fixedly connected to the inner ring 121 and the outer ring 122 respectively, so that the outer ring 122 and the inner ring 121 are fixedly connected as a whole through the connecting ribs 123. A center hole 1203 is provided at the center position of the inner ring 121, and a variable pitch spiral rib 1201 is provided on the side of the outer ring 122 away from the main spray arm 11. The bottom of the inner ring 121 is flush with the bottom of the outer ring 122, the top of the inner ring 121 is higher than the top of the outer ring 122, and the height of the connecting ribs 123 gradually decreases from the inside to the outside, so that the rotating disk 12 is arranged with a high middle and a low outer edge.

[0055] Reinforcing ribs 124 are connected between adjacent connecting ribs 123, and grille holes 1204 are formed between adjacent connecting ribs 123, which effectively reduces the overall weight of the turntable 12 and helps reduce the influence of the turntable 12 on the rotation of the main spray arm 11. Mounting portions 1202 are provided at two of the grille holes 1204 that are arranged opposite to each other, and the radial inner side of the mounting portion 1202 is integrally formed with the inner ring. In addition, a clearance portion 1205 is provided at a position of the inner ring 121 corresponding to the mounting portion 1202, so that the turntable has sufficient installation space, and it is convenient for the connector (such as a screw) to detachably connect the mounting portion 1202 on the turntable 12 with the top of the main spray arm 11 as a whole.

[0056] refer to Figure 6-7 In this embodiment, the connecting rod 61 is a hollow rod to reduce weight and consumables. The connecting rod 61 includes a left connecting section 611, a right connecting section 612 and a transition section 613. The transition section 613 is arranged between the left connecting section and the right connecting section, and the transition section 613 is threadedly connected to the left connecting section and the right connecting section respectively. A first gear 63 is respectively arranged outside the end of the left connecting section 611 and the right connecting section 612 away from the end of the transition section 613, and a connecting gear 62 is arranged outside the transition section 613.

[0057] Specifically, the specific structure of the auxiliary spray arm 21 includes but is not limited to any of the following:

[0058] The first one, reference Figure 1-2 and Figure 5 The auxiliary spray arm 21 includes a first spray arm body 211 having a plurality of second spray holes 2102, a second spray arm body 212 having a plurality of second spray holes 2102, and a connecting pipe 213. The connecting pipe 213 is connected between the first spray arm body 211 and the second spray arm body 212. The first spray arm body 211 is connected to the second spray arm body 212 through the connecting pipe 213. The first spray arm body 211 is provided with a second water inlet 2101 connected to the water receiving pipe 32. The follower 22 is fixedly connected to the periphery of the connecting pipe 213. In this embodiment, the first spray arm body 211 and the second spray arm body 212 are respectively threadedly connected to the connecting pipe 213.

[0059] The second type is different from the first type in that the second spray arm body and the connecting pipe are omitted. At this time, the first spray arm body is provided with a second flow channel and a plurality of second spray holes 2102. The front end of the first spray arm body 211 is closed, and the rear end is provided with a second water inlet, which is connected to the water outlet joint 321 of the water receiving pipe 32, and the first spray arm body 211 can rotate relative to the water outlet joint 321 of the water receiving pipe 32, and the follower 22 is fixedly connected to the front end or the middle part of the first spray arm body 211.

[0060] refer to Figure 1-2Furthermore, the spray arm mechanism further includes a water pipe assembly 3 and a rotating shaft assembly 4. The water pipe assembly 3 includes a main water pipe 31 and two water receiving pipes 32 arranged on the left and right outer sides of the main water pipe 31. In this embodiment, the water inlet ends of the two water receiving pipes 32 are respectively connected to the water inlet ends of the main water pipe 31. Specifically, water diversion ports 311 extending toward the water receiving pipe 32 are respectively arranged on the opposite outer sides of the water inlet end of the main water pipe 31. One end of the water receiving pipe 32 close to the main water pipe 31 is connected and connected to the corresponding water diversion port 311. In other embodiments, the water inlet ends of the two water receiving pipes 32 are not connected to the water inlet ends of the main water pipe 31. In this case, the water inlet ends of the two water receiving pipes 32 are configured to be connected to the inner water pipe of the dishwasher.

[0061] The first spray arm 1 is arranged below the main water pipe 31. The main spray arm 11 is rotatably connected to the water outlet of the main water pipe 31 through the rotating shaft assembly 4. At this time, the first spray arm 1 can rotate around the spray arm rotating shaft 41 in the rotating shaft assembly 4. The first water inlet 111 of the main spray arm 11 is connected to the water outlet of the main water pipe 31. The two auxiliary spray arms 21 are rotatably connected to the water outlets of the two water receiving pipes 32 respectively. The second water inlet 2101 of the auxiliary spray arm 21 is connected to the water outlet of the corresponding water receiving pipe 32. In this embodiment, a water outlet joint 321 is provided at the water outlet of the water receiving pipe 32. The water outlet joint 321 is inserted into the second water inlet 2101 of the auxiliary spray arm 21. The second spray arm 2 can rotate relative to the water outlet joint 321. In this way, the main water pipe 31 can supply water to the first spray arm 1, and can also supply water to the two second spray arms 2 through the two water receiving pipes 32. With the cooperation of the first spray arm 1 and the two second spray arms 2, the flushing angle can be increased, the spraying mode can be enriched, and the cleaning effect of the dishwasher can be effectively improved.

[0062] refer to Figure 2 The shaft assembly 4 includes a spray arm shaft 41, a spray arm support 42 and a gasket 43. The spray arm shaft 41 is vertically inserted through the center hole of the first rotating disk 12 and the first water inlet of the main spray arm 11, and the upper end of the spray arm shaft 41 is fixedly connected and communicated with the main water pipe, and the lower end is rotatably connected with the main spray arm 11. The spray arm support 42 is sleeved outside the spray arm shaft 41 and is located between the first rotating disk 12 and the main water pipe 31. The gasket 43 is sleeved outside the arm shaft 41 and is clamped between the spray arm support 42 and the annular flange at the upper end of the spray arm shaft.

[0063] refer to Figure 1-2 and Figure 8The present embodiment also provides a dishwasher, which includes a bowl basket assembly 7, a connecting assembly 5 and a spray arm mechanism as described above, wherein the bowl basket assembly 7 is arranged on the top of the spray arm assembly, the bowl basket assembly 7 is detachably connected to the main water pipe 31 in the spray arm mechanism, and the bowl basket assembly 7 is detachably connected to two auxiliary spray arms 21 through the connecting assembly 5, respectively, and the auxiliary spray arms 21 can rotate relative to the connecting assembly 5. Therefore, under the action of the above-mentioned spray arm mechanism, the flushing angle is increased, the diversity of spraying is enriched, and the cleaning effect of the dishwasher is effectively improved.

[0064] refer to Figure 1-2 The connection assembly 5 includes two connection blocks 51, which are respectively clamped outside the two auxiliary spray arms 21 from bottom to top and are detachably connected to the bottom of the bowl basket assembly 7. The auxiliary spray arm 21 can rotate relative to the corresponding connection block 51, so that the second spray arm 2 can be stably and reliably installed on the bottom of the bowl basket assembly 7 through the connection block 51, and the second spray arm can be reliably supported. In this embodiment, a limiting groove 512 opening upward is provided on the connection block 51, and an annular convex rib 2104 is convexly provided at the position of the outer wall of the auxiliary spray arm 21 corresponding to the limiting groove 512. The annular convex rib 2104 is rotatably inserted into the limiting groove 512, so that the second spray arm 2 can be reliably supported and the second spray arm 2 can be limited forward and backward. A plurality of first bottom steel wires 711 arranged side by side and spaced in the left-right direction and a plurality of second bottom steel wires 712 arranged side by side and spaced in the front-back direction are formed at the bottom of the bowl basket assembly 7. The first bottom steel wire 711 is welded and fixed to the top of the second bottom steel wire 712. A buckle portion 511 extending upward is provided at one end of the connection block 51, and / or a buckle groove 513 opening upward is provided at the other end of the connection block 51. The buckle portion 511 is engaged with one of the first bottom steel wires 711 arranged near it, and the buckle groove 513 is engaged with one of the second bottom steel wires 712 arranged near it, so that the connection block 51 can be detachably mounted on the bowl basket assembly 7. In addition, an avoidance notch is provided at the top of the buckle portion 511, and the avoidance notch is used for the second bottom steel wire 712 arranged near it to pass horizontally. Embodiment 2

[0065] refer to Figure 9-13, the difference between this embodiment and embodiment 1 is that the specific structures of the active member and the transmission assembly 6 are different. Specifically, the active member is the second turntable 13, the second turntable 13 is fixedly connected to the top of the main spray arm and is coaxially arranged with the first water inlet 111, and a threaded portion 1301 spirally upward along the outer wall of the second turntable 13 is convexly provided on the outer wall of the second turntable 13. The driven member 22 is a second gear. The transmission assembly 6 includes a connecting rod 61 and two first gears 63, the connecting rod 61 is arranged outside the front side or the rear side of the first turntable 12, and a protrusion 6101 evenly spaced along its circumferential direction is convexly provided on the outer surface of the middle part of the connecting rod 61, and the protrusion 6101 is meshed with the threaded portion 1301 to form a primary transmission; the two first gears 63 are respectively fixedly connected to the left and right ends of the connecting rod 61, and are respectively meshed with the second gears of the two second spray arms 2 to form a secondary transmission. Thus, a two-stage transmission is formed by the cooperation of the threaded portion 1301 on the second turntable 13, the multiple protrusions 6101 on the connecting rod 61, the first gear 63 and the second gear, which can transmit the rotational force to a farther side, while further improving the spraying effect at the four corners and further enhancing the cleaning effect.

[0066] More specifically, the number of spiral turns of the threaded portion 1301 is greater than 3, and the distance between two adjacent spiral turns is m times the arc length M3M4 between two adjacent protrusions 6101, so that the second rotating disk 13 rotates one circle following the main spray arm 11, and the connecting rod 61 rotates m protrusions 6101. Fig.13 , the dotted circular line N is the pitch circle of the transmission assembly 6 at the protrusion 6101, wherein M3 and M4 are the intersection points of two adjacent protrusions 6101 on the pitch circle of the transmission assembly 6. In this embodiment, the protrusion 6101 is cylindrical, and / or m is 1-5. When m is 1, the distance between two adjacent spiral coils is equal to the arc length M3M4, at which time the main spray arm 11 rotates one circle, and the connecting rod 15 rotates one protrusion 6101.

[0067] refer to Figure 9-11 The second rotating disk 13 is a circular structure. A central through hole 1302 is provided at the center of the second rotating disk 13 for the spray arm rotating shaft 41 to vertically pass through. An annular positioning column 1303 extending downward and located at the periphery of the central through hole 1302 is integrally formed at the bottom of the second rotating disk 13. Mounting bosses 1304 extending outward are respectively provided on the two opposite outer sides of the lower end of the annular positioning column 1303. The mounting bosses 1304 are detachably connected to the top of the main spray arm 11. An air avoidance hole 1305 is provided at the position of the second rotating disk 13 corresponding to the mounting boss 1304, so as to facilitate the disassembly and assembly of the connecting screws between the mounting boss 1304 and the main spray arm 11. Reinforcing ribs 1306 are respectively provided at the top and / or bottom of the second rotating disk 13 to achieve the purpose of strengthening the overall strength of the second rotating disk.

[0068] In this embodiment, the second rotating disk 13 includes a disk body 131 and an outer ring wall 132. The outer ring wall 132 is integrally formed and arranged on the outer periphery of the disk body 131. A threaded portion 1301 is integrally formed and convexly provided on the outer surface of the outer ring wall 132. The disk body 131 is provided with a central through hole 1302, an annular positioning column 1303, an air avoidance hole 1305 and a reinforcing rib 1306.

[0069] refer to Figure 12-13 In this embodiment, the connecting rod 61 is a hollow rod to reduce weight and consumables. The connecting rod 61 includes a left connecting section 611, a right connecting section 612 and a transition section 613. The transition section 613 is arranged between the left connecting section and the right connecting section, and the transition section 613 is threadedly connected to the left connecting section and the right connecting section respectively. A first gear 63 is respectively provided outside the end of the left connecting section 611 and the right connecting section 612 away from the end of the transition section 613, and a plurality of protrusions 6101 extending outward and uniformly distributed circumferentially are integrally formed in the middle of the outer surface of the transition section 613.

[0070] Example 3

[0071] refer to Figure 14-17 , the difference between this embodiment and embodiment 2 is that the specific structures of the active member and the transmission assembly 6 are different. Specifically, the active member is the turbine 14, and the driven member 22 is the second gear. The transmission assembly 6 includes a connecting rod 61, a worm 64 and two first gears 63. The connecting rod 61 is arranged outside the front side or the rear side of the turbine 14. The worm 64 is fixedly connected to the middle part of the connecting rod 61 and meshes with the turbine 14 to form a primary transmission. At this time, the cooperation between the turbine 14 and the worm 64 on the connecting rod 61 is a turbine worm transmission. The two first gears 63 are respectively fixedly connected to the left and right ends of the connecting rod 61, and are respectively meshed with the second gears of the two second spray arms 2 to form a secondary transmission. Thus, a secondary transmission is formed under the cooperation of the turbine 141, the worm 64, the first gear 63 and the second gear, which can transmit the rotational force to a farther side, and at the same time further improve the spraying effect at the four corners, further improving the cleaning effect.

[0072] Specifically, the transmission ratio of the turbine 14 to the worm 64 is 10-20. When the main spray arm 11 rotates, the circular spray arms (ie, the auxiliary spray arms 21 ) on both sides rotate 10-20 circles.

[0073] refer to Figure 14-16The turbine 14 is a circular structure, and a central through hole 1302 is provided at the center of the turbine 14, and the central through hole is used for the spray arm to pass through vertically. An annular positioning column 1303 extending downward and located at the periphery of the central through hole 1302 is integrally formed at the bottom of the turbine 14, and mounting bosses 1304 extending outward are respectively provided on the two opposite outer sides of the lower end of the annular positioning column 1303. The mounting bosses 1304 are detachably connected to the top of the main spray arm 11, so that the volute can be detachably fixedly installed on the top of the main spray arm. An air avoidance hole 1305 is provided at the position of the turbine 14 corresponding to the mounting boss 1304, so as to facilitate disassembly and assembly. A groove 141 extending downward and opening upward is recessed at the top of the turbine 14, and the diameter of the groove 141 is larger than the diameter of the shaft assembly 4, so that the groove 141 can accommodate the shaft support 42 in the shaft assembly 4. A central through hole 1302 and a clearance hole 1305 are provided at the center of the bottom of the groove 141 , and an annular positioning column 1303 is provided on the lower surface of the bottom of the groove 141 .

[0074] refer to Fig.17 In this embodiment, the connecting rod 61 is a hollow rod to reduce weight and consumables. The connecting rod 61 includes a left connecting section 611, a right connecting section 612 and a transition section 613. The transition section 613 is arranged between the left connecting section and the right connecting section, and the transition section 613 is threadedly connected to the left connecting section and the right connecting section respectively. A first gear 63 is respectively arranged outside the end of the left connecting section 611 and the right connecting section 612 away from the end of the transition section 613, and a spiral structure is arranged on the outer surface of the transition section 613. The spiral structure is meshed with the toothed structure evenly distributed on the turbine 12. At this time, the transition section 613 with the spiral structure constitutes a worm 64.

[0075] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A spray arm mechanism, characterized in that: include: A first spray arm (1), comprising a main spray arm (11) and an active component, wherein the main spray arm (11) is provided with a first water inlet (111) and a plurality of first spray holes (112), and the active component is fixedly connected to the middle portion of the top of the main spray arm (11); Two second spray arms (2) are arranged above the main spray arm (11) and are respectively located on the left and right outer sides of the active member, the second spray arm (2) comprises an auxiliary spray arm (21) and a driven member (22), the auxiliary spray arm (21) is provided with a second water inlet (2101) and a plurality of second spray holes (2102), and the driven member (22) is fixedly connected to the auxiliary spray arm (21); and A transmission assembly (6), wherein the active member is respectively connected to the driven members (22) of the two second spray arms (2) through the transmission assembly (6).

2. A spray arm mechanism according to claim 1, characterized in that: The active member is a first rotating disk (12), and a variable pitch spiral rib (1201) arranged along the circumferential direction is provided on a side of the first rotating disk (12) away from the main spray arm (11); the driven member (22) is a second gear; The transmission assembly (6) comprises a connecting rod (61), a connecting gear (62) and two first gears (63); the connecting rod (61) is arranged on the outside of the side of the first turntable (12) away from the main spray arm (11); the connecting gear (62) is fixedly connected to the outside of the middle part of the connecting rod (61) and meshes with the variable pitch spiral rib (1201); the two first gears (63) are respectively fixedly connected to the left and right ends of the connecting rod (61) and respectively mesh with the second gears of the two second spray arms (2).

3. A spray arm mechanism according to claim 2, characterized in that: The number of windings of the variable pitch spiral rib (1201) is greater than 1; the connecting gear (62) has gear teeth (621) evenly arranged along its circumferential direction, and the distance between two adjacent windings is n times the arc length between two adjacent gear teeth (621).

4. A spray arm mechanism according to claim 3, characterized in that: The variable pitch spiral ribs (1201) are uniformly variable pitched at equal angles, and / or n is 1-5.

5. A spray arm mechanism according to claim 1, characterized in that: The active member is a second rotating disk (13), and a threaded portion (1301) is protruded on the outer wall of the second rotating disk (13) and spirally extends upward along the outer wall of the second rotating disk (13); the driven member (22) is a second gear; The transmission assembly (6) comprises a connecting rod (61) and two first gears (63); the connecting rod (61) is arranged outside the front or rear side of the first turntable (12); a protrusion (6101) is protruded on the outer surface of the middle part of the connecting rod (61) and is evenly spaced along its circumferential direction; the protrusion (6101) is meshed with the threaded portion (1301); the two first gears (63) are respectively fixedly connected to the left and right ends of the connecting rod (61) and are respectively meshed with the second gears of the two second spray arms (2).

6. A spray arm mechanism according to claim 5, characterized in that: The number of spiral windings of the threaded portion (1301) is greater than 3, and the distance between two adjacent spiral windings is m times the arc length between two adjacent raised portions (6101).

7. A spray arm mechanism according to claim 6, characterized in that: The protrusion (6101) is cylindrical, and / or m is 1-5.

8. A spray arm mechanism according to claim 1, characterized in that: The active component is a turbine (14); the driven component (22) is a second gear; The transmission assembly (6) comprises a connecting rod (61), a worm gear (64) and two first gears (63); the connecting rod (61) is arranged outside the front or rear side of the turbine (14); the worm gear (64) is fixedly connected to the middle part of the connecting rod (61) and meshes with the turbine (14); the two first gears (63) are respectively fixedly connected to the left and right ends of the connecting rod (61) and respectively mesh with the second gears of the two second spray arms (2).

9. A spray arm mechanism according to claim 8, characterized in that: The transmission ratio between the turbine (14) and the worm (64) is 10-20.

10. A spray arm mechanism according to claim 1, characterized in that: The rotation axis of the main spray arm (11) and the rotation axis of the auxiliary spray arm (21) are perpendicular to each other; and / or the angle range between the direction of the first spray hole (112) and the rotation plane of the first spray arm (1) is 40-90°, and the angle range between the direction of the second spray hole (2102) and the rotation plane of the second spray arm (2) is 0-50°.

11. A spray arm mechanism according to any one of claims 1 to 10, characterized in that: It also comprises a water pipe assembly (3), the water pipe assembly (3) comprising a main water pipe (31) and two water receiving pipes (32), the water inlet ends of the two water receiving pipes (32) being connected to or not connected to the water inlet end of the main water pipe (31); The main spray arm (11) is rotatably connected to the water outlet end of the main water pipe (31), and the first water inlet (111) is connected to the water outlet end of the main water pipe (31); The two auxiliary spray arms (21) are rotatably connected to the water outlet ends of the two water receiving pipes (32), respectively, and the second water inlet (2101) of the auxiliary spray arm (21) is connected to the water outlet end of the corresponding water receiving pipe (32).

12. A dishwasher, characterized in that: It comprises a bowl-basket assembly (7), a connecting assembly (5) and a spray arm mechanism as claimed in any one of claims 1 to 11, wherein the bowl-basket assembly (7) is arranged on the top of the spray arm mechanism, the bowl-basket assembly (7) is respectively connected to the two auxiliary spray arms (21) through the connecting assembly (5), and the auxiliary spray arms (21) can rotate relative to the connecting assembly (5).

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