Spraying arm mechanism and dish washing machine thereof

Abstract

The utility model discloses a gushing arm mechanism and dish-washing machine thereof, the gushing arm mechanism includes: a first gushing arm including a main gushing arm and a driving member, the driving member is fixedly connected to the middle of the top of the main gushing arm; the two second gushing arms are arranged above the main gushing arm and located on the left outer side and the right outer side of the driving part respectively, each second gushing arm comprises an auxiliary gushing arm and a driven part, and the driven parts are fixedly connected to the auxiliary gushing arms; and the driving piece is in transmission connection with the driven pieces of the two second spraying arms through the transmission assembly. According to the spraying arm mechanism, the flushing angle is increased, the spraying mode is enriched, and the cleaning effect of the dish washing machine is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dish washer technical field especially relates to a spray arm mechanism and dish washer thereof. BACKGROUND

[0002] The household dish washer usually is under the scouring action of the spray water column, combines the washing consumables, heating and so on auxiliary means, reaches the purpose that the utensil on the pollutant is washed clean. However, the middle layer waterway water pressure of existing dish washer is small, the dish washer middle part spray arm mostly adopts single circular spray mode, only has single washing angle and position, simultaneously exists many dead angle that cannot be washed, such as the inner wall of higher depth container. SUMMARY

[0003] The utility model aims at at least in a certain extent solves one of the problems existing in prior art related, for this purpose, the utility model provides a spray arm mechanism, increases the washing angle, enriches the spray mode, effectively improves the cleaning effect of dish washer. The utility model also provides a dish washer.

[0004] According to the spray arm mechanism provided in the above, the following technical scheme is used to realize it:

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

[0006] In some embodiments, the driving member is a first rotating disc, a variable-pitch spiral rib arranged in the circumferential direction is arranged on the side of the first rotating disc away from the main spray arm; the driven member is a second gear; the transmission assembly comprises a connecting rod, a connecting gear and two first gears, the connecting rod is arranged outside the side of the first rotating disc away from the main spray arm, the connecting gear is fixedly connected to the middle part of the connecting rod and engaged with the variable-pitch spiral rib, and the two first gears are respectively fixedly connected to the left and right ends of the connecting rod and respectively engaged with the second gears of the two second spray arms.

[0007] In some embodiments, the number of turns of the variable-pitch spiral rib is greater than one turn; the connecting gear has teeth uniformly arranged in the circumferential direction thereof, and the distance between adjacent two turns of the variable-pitch spiral rib is n times the arc length between adjacent two teeth.

[0008] In some embodiments, the variable pitch helical rib is equiangularly and uniformly variable pitch, and / or the n is 1-5.

[0009] In some embodiments, the driving member is a second rotary disc, a helical thread is formed on the outer wall of the second rotary disc and spirally extends upward, the driven member is a second gear, and the transmission assembly comprises a connecting rod and two first gears. The connecting rod is arranged on the front or rear side of the first rotary disc, a protrusion is formed on the outer surface of the middle part of the connecting rod and uniformly spaced along the circumferential direction of the connecting rod, the protrusion is engaged with the helical thread, and the two first gears are respectively fixedly connected to the left and right ends of the connecting rod and engaged with the second gears of the two second spray arms.

[0010] In some embodiments, the helical thread has a number of spiral turns greater than n, and the distance between adjacent two spiral turns is m times the arc length between adjacent two protrusions.

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

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

[0013] In some embodiments, the transmission ratio of the turbine to the worm is 10-20.

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

[0015] In some embodiments, a water pipe assembly is further included, which comprises a main water pipe and two branch water pipes. The water inlet ends of the two branch water pipes are in communication with or not in communication with the water inlet end of the main water pipe. The main spray arm is rotationally connected to the water outlet end of the main water pipe, and the first water inlet is in communication with the water outlet end of the main water pipe. The two auxiliary spray arms are respectively rotationally connected to the water outlet ends of the two branch water pipes, and the second water inlets of the auxiliary spray arms are in communication with the water outlet ends of the corresponding branch water pipes.

[0016] According to the above-mentioned dish washing machine, the technical scheme is as follows:

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

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

[0019] The spray arm mechanism has the beneficial effects that: the driving member is fixedly connected to the main spray arm, the two second spray arms are arranged on the left and right outer sides of the driving member in parallel and in the same direction, the driving member is in transmission connection with the two second spray arms through the transmission assembly, the main spray arm can drive the two second spray arms simultaneously, and the washing angle can be increased and the spraying mode can be enriched under the cooperation of the first spray arm and the two second spray arms, so that the cleaning effect of the dishwasher is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structural schematic view of the spray arm mechanism in the embodiment 1 of the dishwasher;

[0021] Figure 2 is an exploded view of the spray arm mechanism in the embodiment 1 of the dishwasher;

[0022] Figure 3 is a structural schematic view of the first rotating disc in the embodiment 1 of the dishwasher;

[0023] Figure 4 is a top view of the first rotating disc in the embodiment 1 of the dishwasher;

[0024] Figure 5 is an exploded view of the second spray arm in the embodiment 1 of the dishwasher;

[0025] Figure 6 is an exploded view of the transmission assembly in the embodiment 1 of the dishwasher;

[0026] Figure 7 is a schematic view of the connecting gear and the transition section in the embodiment 1 of the dishwasher;

[0027] Figure 8 is a structural schematic view of the basket assembly and the spray arm mechanism in the embodiment 1 of the dishwasher;

[0028] Figure 9 is a structural schematic view of the spray arm mechanism in the embodiment 2 of the dishwasher;

[0029] Figure 10 is a structural schematic view of the second rotating disc in the embodiment 2 of the dishwasher;

[0030] Figure 11Is the cross section view of the second turntable in the embodiment 2 of the utility model;

[0031] Figure 12 Is the explosion view of the cross section view of the transmission assembly in the embodiment 2 of the utility model;

[0032] Figure 13 Is the cross section view of the transmission assembly in another angle in the embodiment 2 of the utility model;

[0033] Figure 14 Is the structure schematic view of the spray arm mechanism in the embodiment 3 of the utility model;

[0034] Figure 15 Is the structure schematic view of the turbine in the embodiment 3 of the utility model Figure 1 ;

[0035] Figure 16 Is the structure schematic view of the turbine in the embodiment 3 of the utility model;

[0036] Figure 17 Is the explosion view of the cross section view of the transmission assembly in the embodiment 3 of the utility model.

[0037] In the drawing: 1 - first spray arm, 11 - main spray arm, 111 - first water inlet, 112 - first spray hole, 12 - turntable, 1201 - variable pitch helical rib, 1202 - mounting portion, 1203 - center hole, 1204 - lattice hole, 1205 - clearance, 121 - inner ring, 122 - outer ring wall, 123 - connecting rib, 124 - reinforcing rib, 13 - second turntable, 1301 - threaded portion, 1302 - center through hole, 1303 - annular positioning column, 1304 - mounting boss, 1305 - clearance hole, 1306 - reinforcing rib, 131 - disc body, 132 - outer ring wall, 14 - turbine, 141 - groove, 142 - toothed 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 - driven member;

[0039] 3 - water pipe assembly, 31 - main water pipe, 311 - water distribution port, 32 - water receiving pipe, 321 - water outlet connector;

[0040] 4 - rotating shaft assembly, 41 - spray arm rotating 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 - drive assembly, 6101 - protrusion, 61 - connecting rod, 611 - left connecting segment, 612 - right connecting segment, 613 - transition segment, 62 - connecting gear, 621 - gear tooth, 63 - first gear, 64 - worm;

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

[0044] The following examples are used to illustrate the present application, but the present application is not limited by these examples. Modifications to the specific embodiments of the present application or equivalent replacements to some technical features are made without departing from the spirit of the present application, which should be covered in the technical solution range claimed by the present application.

[0045] Example 1

[0046] Reference Figures 1-2 The present embodiment provides a spray arm mechanism, which comprises a first spray arm 1, two second spray arms and a drive assembly 6. The first spray arm 1 comprises a main spray arm 11 and a driving 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 to the plurality of first spray holes 112. In the present embodiment, the first water inlet 111 is arranged at the middle of the top of the main spray arm 11 in the left-right direction. The plurality of first spray holes 112 are arranged at the top of the main spray arm 11 and are spaced apart along the length direction of the main spray arm 11. A spray arm shaft 41 is arranged vertically at the first water inlet 111 and is rotationally connected to the main spray arm 11. The driving member is fixedly connected to the middle of the top of the main spray arm 11 and is coaxially arranged with the first water inlet 111. In this way, when the main spray arm 11 is rotated by the water flow, the driving member can be rotated synchronously. At the same time, the arrangement of the driving member can prevent the stability of the rotation of the main spray arm from being affected.

[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 at the left and right outer sides of the driving member. The second spray arm 2 comprises a secondary spray arm 21 and a driven member 22. The secondary 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 member 22 is fixedly connected to the secondary spray arm 21. The drive assembly 6 is arranged at the front side or the rear side of the driving member. The driving member is drivingly connected to the driven members 22 of the two second spray arms 2 through the drive assembly 6. In the present embodiment, the secondary spray arm 21 is preferably a circular spray arm. The two second spray arms 2 and the drive assembly 6 are surrounded to form an H-shaped structure. The distance between the two second spray arms 2 is greater than the diameter of the driving member.

[0048] When the main spray arm 11 is driven to rotate by water flow, the main member can be synchronously rotated, and the main member can be linked with the two secondary spray arms 21 to rotate at the same time through the transmission assembly 6, so that the spray water column formed by the main spray arm 11 and the two secondary spray arms 21 is crossed, the spray diversity is enriched, the flushing angle is increased, and the cleaning effect of the dishwasher is effectively improved. In addition, by arranging the transmission assembly 6, the size of the main member is not limited between the two secondary spray arms 2, the rotating force is transmitted to the farther side, and the spray effect of the four-corner position of the inner container is further improved.

[0049] Reference Figures 1-3 The main member is a first rotating disc 12, the first rotating disc 12 is connected and fixed at the top of the first spray arm 11 and coaxially arranged with the first water inlet 111, and a variable-pitch spiral rib 1201 is arranged on the top of the first rotating disc 12 along the circumferential direction thereof. The driven member 22 is a second gear. The transmission assembly 6 includes a connecting rod 61, a connecting gear 62 and two first gears 63. The connecting rod 61 is arranged on the front side or the rear side above the first rotating disc 12. The connecting gear 62 is fixedly connected to the middle part outside the connecting rod 61 and is engaged 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 disc 12 can be regarded as the cooperation of a cam mechanism, and the first rotating disc plays a role of 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 engaged with the second gears of the two secondary spray arms 2 to form two secondary transmissions. In this embodiment, the first gear 63 and the second gear are preferably bevel gears. Thus, the cooperation of the variable-pitch spiral rib 1201, the connecting gear 62, the first gear 63 and the second gear forms a secondary transmission, the rotating force can be transmitted to the farther side, and the spray effect of the four-corner position is further improved, and the cleaning effect is further improved.

[0050] Reference Figures 1-7 Specifically, the number of turns of the variable-pitch spiral rib 1201 is greater than 1 turn; the connecting gear 62 has teeth 621 uniformly arranged along the circumferential direction thereof, the distance Q1Q2 between adjacent two turns is n times of the arc length M1M2 between adjacent two teeth 621, so that the first rotating disc 12 rotates one turn following the main spray arm 11, and the connecting gear 62 rotates n teeth. It is particularly pointed out that Figure 4 The dashed line P1P2 is a ray on the first rotating disc 12, wherein Q1 and Q2 are the intersection points of the ray and the variable-pitch spiral rib 1201, and the distance between Q1 and Q2 is a specific distance; and Figure 7 The circular dashed line L is a division circle on the connecting gear 62, wherein M1 and M2 are respectively the intersection points of the middle points of adjacent two teeth 621 on the division circle of the connecting gear 62.

[0051] More specifically, the variable-pitch helical rib 1201 is equiangular and uniform variable-pitch, and / or n is 1-5. In the present embodiment, the variable-pitch helical rib 1201 has a winding number 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. In this case, the main spray arm 11 drives the first rotating disc 12 to rotate one full circle, and the connecting gear 62 rotates one gear tooth.

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

[0053] With reference to Figures 1-4 In the present embodiment, the first rotating disc 12 has a circular structure, and a central hole 1203 is arranged at the center of the first rotating disc 12 for the vertical passage of the rotating shaft assembly 4. The central hole 1203 is coaxially arranged with the first water inlet 111, and the diameter of the central hole 1203 is smaller than the diameter of the first water inlet 111. At least two mounting portions 1202 are arranged on the first rotating disc 12, and the at least two mounting portions 1202 are circumferentially spaced between the variable-pitch helical rib 1201 and the central hole 1203. Each mounting portion 1202 is fixedly connected to the main spray arm 11 by a connecting member (such as a screw), a buckle structure or other connecting structure, so as to realize the fixed installation of the first rotating disc 12 on the top of the main spray arm 11.

[0054] The first rotating disc 12 includes an inner ring 121, an outer ring 122 and a plurality of connecting ribs 123. The outer ring 122 is arranged at the periphery of the inner ring 121, and the plurality of connecting ribs 123 are circumferentially spaced between the inner ring 121 and the outer ring 122. The opposite ends of the connecting rib 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 by the connecting rib 123. The central hole 1203 is arranged at the center of the inner ring 121, and the variable-pitch helical rib 1201 is arranged 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 rib 123 gradually decreases from inside to outside, so that the rotating disc 12 is arranged with the middle part being higher and the outer edge being lower.

[0055] The reinforcing ribs 124 are connected between the adjacent connecting ribs 123, and the lattice holes 1204 are formed between the adjacent connecting ribs 123, so as to effectively reduce the overall weight of the rotating disc 12 and facilitate reduction of the influence of the rotating disc 12 on the rotation of the main spray arm 11. The mounting portions 1202 are arranged at two opposite lattice holes 1204, and the mounting portions 1202 are integrally formed on the inner ring radially inward. In addition, the empty portions 1205 are arranged at the positions of the inner ring 121 corresponding to the mounting portions 1202, so as to provide sufficient mounting space for the rotating disc, and facilitate detachable connection of the mounting portions 1202 on the rotating disc 12 with the top of the main spray arm 11 by the connecting members (such as screws).

[0056] Reference Figures 6-7 In the embodiment, the connecting rod 61 is a hollow rod, so as to reduce the weight and reduce the consumption. The connecting rod 61 includes a left connecting segment 611, a right connecting segment 612, and a transition segment 613. The transition segment 613 is arranged between the left connecting segment and the right connecting segment, and the transition segment 613 is threadedly connected with the left connecting segment and the right connecting segment respectively. The first gear 63 is arranged on the end of the left connecting segment 611 and the end of the right connecting segment 612 away from the transition segment 613 respectively, and the connecting gear 62 is arranged on the transition segment 613.

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

[0058] The first kind, referring to Figures 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 communicated with the second spray arm body 212 through the connecting pipe 213, the second water inlet 2101 communicated with the water receiving pipe 32 is arranged on the first spray arm body 211, and the driven member 22 is fixedly connected to the periphery of the connecting pipe 213. In the embodiment, the first spray arm body 211 and the second spray arm body 212 are threadedly connected with the connecting pipe 213 respectively.

[0059] The second kind is different from the first kind in that the second spray arm body and the connecting pipe are omitted, 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, the rear end is provided with a second water inlet, the second water inlet is communicated with the water outlet connector 321 of the water receiving pipe 32, and the first spray arm body 211 can rotate relative to the water outlet connector 321 of the water receiving pipe 32, and the driven member 22 is fixedly connected to the front end or the middle part of the first spray arm body 211.

[0060] Reference Figures 1-2Further, the spray arm mechanism further comprises a water pipe assembly 3 and a rotating shaft assembly 4. The water pipe assembly 3 comprises 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 end of the main water pipe 31. Specifically, the opposite outer sides of the water inlet end of the main water pipe 31 are respectively provided with water distribution openings 311 extending towards the water receiving pipes 32, and one end of each water receiving pipe 32 close to the main water pipe 31 is connected to and communicates with the corresponding water distribution opening 311. In other embodiments, the water inlet ends of the two water receiving pipes 32 are not connected to the water inlet end of the main water pipe 31, and the water inlet ends of the two water receiving pipes 32 are configured to communicate with the inner water pipe of the dishwasher.

[0061] The first spray arm 1 is arranged below the main water pipe 31, and the main spray arm 11 is rotatably connected to the water outlet end 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, and the first water inlet opening 111 of the main spray arm 11 communicates with the water outlet end of the main water pipe 31. The two secondary spray arms 21 are respectively rotatably connected to the water outlet ends of the two water receiving pipes 32, and the second water inlet opening 2101 of the secondary spray arm 21 communicates with the water outlet end of the corresponding water receiving pipe 32. In this embodiment, a water outlet connector 321 is arranged at the water outlet end of the water receiving pipe 32, the water outlet connector 321 is inserted into the second water inlet opening 2101 of the secondary spray arm 21, and the second spray arm 2 can rotate relative to the water outlet connector 321. In this way, the main water pipe 31 can supply water to the first spray arm 1 and the two secondary spray arms 2 through the two water receiving pipes 32, and under the cooperation of the first spray arm 1 and the two secondary spray arms 2, the washing angle can be increased, the spraying mode can be enriched, and the cleaning effect of the dishwasher can be effectively improved.

[0062] Reference Figure 2 The rotating shaft assembly 4 comprises a spray arm rotating shaft 41, a spray arm support 42, and a gasket 43. The spray arm rotating shaft 41 is vertically arranged in the central hole of the first rotating disc 12 and the first water inlet opening of the main spray arm 11, and the upper end of the spray arm rotating shaft 41 is fixedly connected to and communicates with the main water pipe, and the lower end is rotatably connected to the main spray arm 11. The spray arm support 42 is sleeved on the outside of the spray arm rotating shaft 41 and located between the first rotating disc 12 and the main water pipe 31, and the gasket 43 is sleeved on the outside of the spray arm rotating shaft 41 and clamped between the spray arm support 42 and the annular flange of the upper end of the spray arm rotating shaft.

[0063] Reference Figures 1-2 and Figure 8The embodiment also provides a dishwasher, which comprises a basket assembly 7, a connecting assembly 5 and the spray arm mechanism as described above, the basket assembly 7 is arranged on the top of the spray arm assembly, the basket assembly 7 is detachably connected with the main water pipe 31 in the spray arm mechanism, and the basket assembly 7 is detachably connected with the two secondary spray arms 21 respectively through the connecting assembly 5, and the secondary spray arms 21 can rotate relative to the connecting assembly 5. Thus, under the action of the spray arm mechanism, the washing angle is increased, the diversity of the spraying is enriched, and the cleaning effect of the dishwasher is effectively improved.

[0064] Reference Figures 1-2 The connecting assembly 5 comprises two connecting blocks 51, the two connecting blocks 51 are respectively clamped from bottom to top outside the two secondary spray arms 21 and are detachably connected with the bottom of the basket assembly 7, and the secondary spray arms 21 can rotate relative to the corresponding connecting blocks 51, so that the second spray arms 2 can be stably and reliably installed on the bottom of the basket assembly 7 through the connecting blocks 51, and reliable support for the second spray arms is realized. In the embodiment, a limiting groove 512 opening upward is arranged on the connecting block 51, a ring-shaped convex rib 2104 is protruded on the outer side wall of the secondary spray arm 21 at a position corresponding to the limiting groove 512, and the ring-shaped convex rib 2104 is rotatably inserted into the limiting groove 512, so that the second spray arms 2 can be reliably supported while being limited in the front-back direction. A plurality of first bottom steel wires 711 arranged side by side and spaced apart in the left-right direction and a plurality of second bottom steel wires 712 arranged side by side and spaced apart in the front-back direction are formed on the bottom of the basket assembly 7, and the first bottom steel wires 711 are welded and fixed on the top of the second bottom steel wires 712. A buckle part 511 extending upward is arranged on one end of the connecting block 51, and / or a clamping groove 513 opening upward is arranged on the other end of the connecting block 51, the buckle part 511 is clamped in cooperation with one of the first bottom steel wires 711 arranged close thereto, and the clamping groove 513 is clamped in cooperation with one of the second bottom steel wires 712 arranged close thereto, so as to detachably install the connecting block 51 on the basket assembly 7. In addition, an avoiding gap is arranged on the top of the buckle part 511, and the avoiding gap is used for the second bottom steel wire 712 arranged close thereto to pass through transversely.

[0065] Reference Figures 9-13The difference between the embodiment and the embodiment 1 is that the specific structure of the driving member and the transmission assembly 6 is different. Specifically, the driving member is a second rotating disc 13 which is fixedly connected to the top of the main spray arm and coaxially arranged with the first water inlet 111, and a threaded portion 1301 is protruded on the outer side wall of the second rotating disc 13 and spirally upward. 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 on the front side or the rear side of the first rotating disc 12, and a plurality of protrusions 6101 are protruded on the outer surface of the connecting rod 61 and uniformly arranged along the circumferential direction of the connecting rod 61, and the protrusions 6101 are engaged 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 respectively engaged with the second gears of the two second spray arms 2 to form a secondary transmission. Thus, the threaded portion 1301 on the second rotating disc 13, the plurality of protrusions 6101 on the connecting rod 61, the first gears 63 and the second gears cooperate to form a secondary transmission, which can transmit the rotating force to a farther side, and at the same time, improve the spraying effect at the four-corner position and further improve the cleaning effect.

[0066] More specifically, the number of spiral turns of the threaded portion 1301 is greater than 3, and the distance between the adjacent two spiral turns is m times of the arc length M3M4 between the adjacent two protrusions 6101. In this way, when the second rotating disc 13 rotates one circle with the main spray arm 11, the connecting rod 61 rotates m protrusions 6101. It is particularly pointed out that, referring to Figure 13 , the circular dashed line N is the index circle of the transmission assembly 6 at the protrusions 6101, and M3 and M4 are respectively the intersection points of the adjacent two protrusions 6101 on the index circle of the transmission assembly 6. In the embodiment, the protrusions 6101 are in a cylindrical shape, and / or m is 1-5. When m is 1, the distance between the adjacent two spiral turns is equal to the arc length M3M4, and at this time, the main spray arm 11 rotates one circle, and the connecting rod 15 rotates one protrusion 6101.

[0067] Referring to Figures 9-11 , the second rotating disc 13 is in a circular structure, a center through hole 1302 for the spray arm shaft 41 to vertically pass through is arranged at the center position of the second rotating disc 13, an annular positioning column 1303 which extends downward and is located at the periphery of the center through hole 1302 is integrally formed at the bottom of the second rotating disc 13, and mounting bosses 1304 which extend outward are respectively protruded at the opposite two outer sides of the lower end of the annular positioning column 1303, and the mounting bosses 1304 are detachably connected with the top of the main spray arm 11. A clearance hole 1305 is arranged at the position of the second rotating disc 13 corresponding to the mounting bosses 1304, so as to facilitate the disconnection and connection of the connecting screws between the mounting bosses 1304 and the main spray arm 11. Reinforcing ribs 1306 are respectively arranged at the top and / or the bottom of the second rotating disc 13, so as to reinforce the overall strength of the second rotating disc.

[0068] In the embodiment, the second rotating disc 13 comprises a disc body 131 and an outer ring wall 132 integrally formed at the periphery of the disc body 131, and a threaded portion 1301 is integrally formed on the outer surface of the outer ring wall 132. The disc body 131 is provided with a central through hole 1302, an annular positioning column 1303, a clearance hole 1305 and a reinforcing rib 1306.

[0069] Reference Figures 12-13 In the embodiment, the connecting rod 61 is a hollow rod to reduce weight and consumption. The connecting rod 61 comprises a left connecting segment 611, a right connecting segment 612 and a transition segment 613, the transition segment 613 is arranged between the left connecting segment and the right connecting segment, and the transition segment 613 is threadedly connected with the left connecting segment and the right connecting segment respectively. A first gear 63 is arranged on the end of the left connecting segment 611 and the right connecting segment 612 away from the transition segment 613 respectively, and a plurality of protruding portions 6101 extending outward and uniformly distributed in the circumference are integrally formed on the middle part of the outer surface of the transition segment 613.

[0070] Embodiment 3

[0071] Reference Figures 14-17 The difference between the embodiment and the embodiment 2 is that the specific structure of the driving member and the transmission assembly 6 is different. Specifically, the driving member is a turbine 14, and the driven member 22 is a second gear. The transmission assembly 6 comprises a connecting rod 61, a worm 64 and two first gears 63, the connecting rod 61 is arranged on 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 engaged 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 turbine worm transmission. The two first gears 63 are respectively fixedly connected to the left and right ends of the connecting rod 61 and respectively engaged with the second gears of the two second spray arms 2 to form a secondary transmission. Thus, the secondary transmission is formed by the cooperation of the turbine 141, the worm 64, the first gear 63 and the second gear, the rotating force can be transmitted to a farther side, and the spraying effect of the four-corner position is improved, and the cleaning effect is further improved.

[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 (i.e. the secondary spray arms 21) on both sides rotate 10-20 turns.

[0073] Reference Figures 14-16, the turbine 14 is circular structure, in the center position of turbine 14 is provided with center through hole 1302, center through hole is used for the spray arm to pass through vertically.In the bottom of turbine 14 integrally formed with the annular positioning column 1303 that extends downwards and is located in the peripheral of center through hole 1302, the opposite two outer sides of the lower end of annular positioning column 1303 are respectively provided with the mounting boss 1304 that extends outward, the mounting boss 1304 is detachably connected with the top of main spray arm 11, so that the volute is detachably fixedly installed on the top of main spray arm.In the position of turbine 14 corresponding mounting boss 1304 is provided with the empty hole 1305, in order to facilitate disassembly and assembly.In the top of turbine 14 is recessed with the recess 141 that extends downwards and opens upward, the diameter of recess 141 is greater than the diameter of rotating shaft assembly 4, so that the recess 141 can accommodate the rotating shaft support 42 in rotating shaft assembly 4.In the center position of recess 141 bottom is provided with center through hole 1302 and empty hole 1305, and the lower surface of recess 141 bottom is provided with annular positioning column 1303.

[0074] Reference Figure 17 In the embodiment, the connecting rod 61 is a hollow rod to reduce weight and reduce consumables. The connecting rod 61 includes a left connecting segment 611, a right connecting segment 612, and a transition segment 613. The transition segment 613 is disposed between the left connecting segment and the right connecting segment, and the transition segment 613 is threadedly connected with the left connecting segment and the right connecting segment, respectively. A first gear 63 is disposed on an end of the left connecting segment 611 and the right connecting segment 612 away from the transition segment 613. A helical structure is disposed on an outer surface of the transition segment 613. The helical structure is engaged with a toothed structure uniformly distributed on the turbine 12. In this case, the transition segment 613 with the helical structure constitutes a worm 64.

[0075] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are all within the scope of the present application.

Claims

1. A spray arm mechanism, characterized by, The utility model provides a kind of water spraying device, comprising: First spray arm (1), including main spray arm (11) and driving element, the main spray arm (11) is equipped with first water inlet (111) and multiple first spray hole (112), the driving element is fixedly connected to the middle part 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 at the left and right outer sides of the driving element, and the second spray arm (2) includes sub-spray arm (21) and driven element (22), the sub-spray arm (21) is equipped with second water inlet (2101) and multiple second spray hole (2102), and the driven element (22) is fixedly connected to the sub-spray arm (21) arranged on the sub-spray arm (21);And Transmission assembly (6), the driving element is respectively connected with the driven element (22) of two second spray arms (2) through the transmission assembly (6).

2. A spray arm mechanism according to claim 1, wherein The driving element is a first rotating disc (12), and a variable-pitch helical rib (1201) is arranged on the side of the first rotating disc (12) away from the main spray arm (11) in the circumferential direction;The driven element (22) is a second gear; The transmission assembly (6) includes a connecting rod (61), a connecting gear (62) and two first gears (63), the connecting rod (61) is arranged outside the side of the first rotating disc (12) away from the main spray arm (11), the connecting gear (62) is fixedly connected to the middle part of the connecting rod (61) and is engaged with the variable-pitch helical rib (1201), and two first gears (63) are respectively fixedly connected to the left and right ends of the connecting rod (61) and are respectively engaged with the second gears of two second spray arms (2).

3. A spray arm mechanism according to claim 2, wherein The number of turns of the variable-pitch helical rib (1201) is greater than 1 turn;The connecting gear (62) has teeth (621) uniformly arranged in the circumferential direction thereof, and the distance between adjacent two turns is n times the arc length between adjacent two teeth (621).

4. A spray arm mechanism according to claim 3, wherein The variable-pitch helical rib (1201) is uniformly variable-pitched at equal angles, and / or n is 1-5.

5. A spray arm mechanism according to claim 2, wherein The driving element is a second rotating disc (13), and a threaded portion (1301) is protruded from the outer side wall of the second rotating disc (13) in a helical upward direction;The driven element (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 or rear side of the first rotating disc (12), a protruding portion (6101) is protruded from the middle outer surface of the connecting rod (61) and is uniformly and spacedly arranged in the circumferential direction thereof, the protruding portion (6101) is engaged with the threaded portion (1301), and two first gears (63) are respectively fixedly connected to the left and right ends of the connecting rod (61) and are respectively engaged with the second gears of two second spray arms (2).

6. A spray arm mechanism according to claim 5, wherein The number of turns of the threaded portion (1301) is greater than 3 turns, and the distance between adjacent two helical turns is m times the arc length between adjacent two protruding portions (6101).

7. A jet arm mechanism according to claim 6, wherein The protruding part (6101) is cylindrical, and / or the m is 1-5.

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

9. A jet arm mechanism according to claim 8, wherein The transmission ratio of the turbine (14) to the worm (64) is 10-20.

10. A spray arm mechanism according to claim 1, wherein The rotation axis of the main spray arm (11) is perpendicular to the rotation axis of the auxiliary spray arm (21), and / or the angle between the orientation of the first spray hole (112) and the rotation plane of the first spray arm (1) is 40-90°, and the angle between the orientation 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, wherein, The water pipe assembly (3) comprises a main water pipe (31) and two water receiving pipes (32), and the water inlet ends of the two water receiving pipes (32) are in communication or not in communication with 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 in communication with the water outlet end of the main water pipe (31). The two auxiliary spray arms (21) are respectively rotatably connected to the water outlet ends of the two water receiving pipes (32), and the second water inlets (2101) of the auxiliary spray arms (21) are in communication with the water outlet ends of the corresponding water receiving pipes (32).

12. A dishwasher, characterized in that The bowl basket assembly (7) is arranged on the top of the spray arm mechanism, the bowl basket assembly (7) is 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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