Spray Arm Assembly and Dishwasher

Abstract

The present disclosure relates to the technical field of kitchen appliances, and more particularly to a spray arm assembly and a dishwasher. The spray arm assembly includes an incomplete gear and a secondary spray arm. The incomplete gear is drivingly connected to the secondary spray arm so that the secondary spray arm can rotate in the inner cavity of the dishwasher, and during the rotation process, the spray trajectory of the secondary spray arm covers the four corners of the inner cavity of the dishwasher. Through the driving connection between the incomplete gear and the secondary spray arm, the secondary spray arm can rotate in the inner cavity of the dishwasher. At the same time, during the rotation process, the secondary spray arm can extend to the four corners of the inner cavity of the dishwasher, thereby spraying and cleaning the tableware at the four corners of the inner cavity of the dishwasher, improving the cleaning effect.

Description

Technical Field

[0001] The present disclosure relates to the technical field of kitchen appliances, and more particularly to a spray arm assembly and a dishwasher. Background Art

[0002] Currently, when most dishwashers clean tableware, the spray arm in the dishwasher rotates around the axis of the central axis of the spray arm seat, and the spray trajectory is circular. However, since the cross-sectional shape of the inner cavity of the existing dishwasher is usually square, the four corners of the inner liner cannot be covered, resulting in cleaning dead corners at the four corner positions, and the tableware at the four corner positions cannot be cleaned properly. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a spray arm assembly and a dishwasher to alleviate the technical problem in the prior art that due to the circular spray trajectory of the existing spray arm and the usually square cross-sectional shape of the inner cavity of the existing dishwasher, the four corners of the inner liner cannot be covered, resulting in cleaning dead corners at the four corner positions and the tableware at the four corner positions cannot be cleaned properly.

[0004] Based on the above purpose, the present disclosure provides a spray arm assembly, including an incomplete gear and a secondary spray arm, the incomplete gear is in transmission connection with the secondary spray arm, so that the secondary spray arm can rotate in the inner cavity of the dishwasher, and during the rotation process, the spray trajectory of the secondary spray arm covers the four corners of the inner cavity of the dishwasher.

[0005] Further, in some optional embodiments, the secondary spray arm is provided with a spray arm gear, and the transmission ratio between the incomplete gear and the spray arm gear is not greater than 1:4.

[0006] Further, in some optional embodiments, the incomplete gear is in transmission connection with the spray arm gear through a transmission mechanism, and the transmission ratio between the incomplete gear and the spray arm gear is 1:4.

[0007] Further, in some optional embodiments, a first stop member is fixedly arranged on the incomplete gear, and a second stop member connected to the secondary spray arm is arranged on one side of the first stop member, and the first stop member cooperates with the second stop member to limit the movement of the secondary spray arm.

[0008] Further, in some optional embodiments, the first stop member includes four stop pieces, the four stop pieces are evenly spaced along the axis of the incomplete gear, and the four stop pieces all have an arc-shaped edge coaxially arranged with the incomplete gear, and the radius of the arc-shaped edge is greater than the radius of the incomplete gear;

[0009] The arc-shaped edge of the stop piece can be adapted to the edge of the second stop member after the first transmission gear is separated from the toothed section of the incomplete gear.

[0010] Further, in some alternative embodiments, the second stop member is approximately square-shaped, and the four edges of the second stop member are bent towards the direction close to the center of the second stop member.

[0011] Further, in some alternative embodiments, the incomplete gear is provided with a first fixing portion, and the first stop member is provided with a first fixing and mating portion. The first fixing portion and the first fixing and mating portion cooperate to fix the first stop member on the incomplete gear.

[0012] Further, in some alternative embodiments, the first fixing portion is a pin shaft, and the first fixing and mating portion is a pin hole, or the first fixing portion is a pin hole, and the first fixing and mating portion is a pin shaft.

[0013] Further, in some alternative embodiments, a second fixing portion is further included. The secondary spray arm is connected to the second fixing portion. The second stop member is provided with a second fixing and mating portion. The second fixing portion and the second fixing and mating portion cooperate to connect the second stop member to the secondary spray arm.

[0014] Further, in some alternative embodiments, the second fixing portion is a pin shaft, and the second fixing and mating portion is a pin hole, or the second fixing portion is a pin hole, and the second fixing and mating portion is a pin shaft.

[0015] Further, in some alternative embodiments, the four stop pieces are integrally formed.

[0016] Further, in some alternative embodiments, the transmission mechanism includes a first transmission gear, a second transmission gear, and a third transmission gear, and the first transmission gear, the second transmission gear, and the third transmission gear are the same;

[0017] The circumferential surface of the incomplete gear is evenly spaced with four toothed sections. The first transmission gear meshes with the toothed section, and the third transmission gear meshes with the spray arm gear; the transmission ratio between the incomplete gear and the first transmission gear is 1:2, and the transmission ratio between the third transmission gear and the spray arm gear is 1:2.

[0018] Further, in some alternative embodiments, the spray arm assembly further includes a main spray arm, and the secondary spray arm is rotatably connected to the main spray arm.

[0019] Further, in some alternative embodiments, the number of the secondary spray arms is two, and the two secondary spray arms are respectively arranged at two ends of the main spray arm; the center line of the main spray arm coincides with the center line of the incomplete gear.

[0020] Further, in some alternative embodiments, the spray arm assembly further includes a spray arm seat, and the gear shaft of the incomplete gear is fixedly connected to the spray arm seat.

[0021] Further, in some alternative embodiments, the spray arm seat is provided with a receiving groove, the groove wall of the receiving groove is provided with a limiting portion, the circumferential surface of the gear shaft of the incomplete gear is provided with a limiting and cooperating portion, and the limiting portion cooperates with the limiting and cooperating portion to fix the gear shaft in the receiving groove.

[0022] Further, in some alternative embodiments, the secondary spray arm is connected to the main spray arm through a connecting shaft of a spray arm gear, through holes are provided in the circumferential side wall of the connecting shaft, and the inner cavities of the secondary spray arm and the main spray arm are both communicated with the inner cavity of the connecting shaft.

[0023] Further, in some alternative embodiments, the secondary spray arm is provided with a sleeve, and the axis of the sleeve coincides with the center line of the secondary spray arm.

[0024] Further, in some alternative embodiments, a first limiting protrusion is provided on the inner wall of the sleeve, the first limiting protrusion extends along the axial direction of the sleeve, and a first limiting groove cooperating with the first limiting protrusion is provided on the circumferential surface of the connecting shaft; a second limiting protrusion is provided on the inner wall of the sleeve, the second limiting protrusion extends along the circumferential direction of the sleeve, and a second limiting groove cooperating with the second limiting protrusion is provided on the circumferential surface of the connecting shaft.

[0025] Based on the above object, the present disclosure also provides a dishwasher including the above-mentioned spray arm assembly.

[0026] Compared with the prior art, the beneficial effects of the present disclosure are as follows:

[0027] The spray arm assembly provided by the present disclosure includes an incomplete gear and a secondary spray arm, and the incomplete gear is in transmission connection with the secondary spray arm, so that the secondary spray arm can rotate in the inner cavity of the dishwasher, and the spray trajectory of the secondary spray arm covers the four corners of the inner cavity of the dishwasher during the rotation process.

[0028] Based on this structure, the spray arm assembly provided by the present disclosure enables the secondary spray arm to rotate in the inner cavity of the dishwasher through the transmission connection between the incomplete gear and the secondary spray arm. At the same time, during the rotation process, the spray trajectory of the secondary spray arm can cover the four corners of the inner cavity of the dishwasher, thereby spraying and cleaning the tableware at the four corners of the inner cavity of the dishwasher, improving the cleaning effect.

[0029] Furthermore, the secondary spray arm is provided with a spray arm gear, and the transmission ratio between the incomplete gear and the spray arm gear is not greater than 1:4. In this way, it can be ensured that the spray trajectory of the secondary spray arm is generated outside the original circular spray trajectory. The spray trajectory of the secondary spray arm is an arc protruding towards the groove wall of the inner cavity of the dishwasher, that is, the spray trajectory of the secondary spray arm is closer to the four corners of the inner cavity of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present disclosure or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is a schematic structural diagram of the spray arm assembly provided by an embodiment of the present disclosure;

[0032] Figure 2 is an exploded view of the spray arm assembly provided by an embodiment of the present disclosure;

[0033] Figure 3 is an exploded view of the main spray arm, incomplete gear and spray arm seat in the spray arm assembly provided by an embodiment of the present disclosure;

[0034] Figure 4 is a cross-sectional view of the main spray arm, incomplete gear and spray arm seat in the spray arm assembly provided by an embodiment of the present disclosure;

[0035] Figure 5 is a schematic structural diagram of the secondary spray arm in the spray arm assembly provided by an embodiment of the present disclosure;

[0036] Figure 6 is a schematic structural diagram of the spray arm gear in the spray arm assembly provided by an embodiment of the present disclosure;

[0037] Figure 7 is a cross-sectional view of the secondary spray arm and the spray arm gear in the spray arm assembly provided by an embodiment of the present disclosure;

[0038] Figure 8 is a schematic diagram of the spray arm assembly provided by an embodiment of the present disclosure in the initial position;

[0039] Figure 9 The spray arm assembly provided by the embodiment of the present disclosure rotates by 22.5° from Figure 8 the initial position shown in the figure;

[0040] Figure 10 The spray arm assembly provided by the embodiment of the present disclosure rotates by 22.5° from Figure 9 the position shown in the figure;

[0041] Figure 11 The spray arm assembly provided by the embodiment of the present disclosure Figure 10 rotates by 45° from the position shown in the figure;

[0042] Figure 12 The spray arm assembly provided by the embodiment of the present disclosure rotates by 22.5° from Figure 11 the position shown in the figure;

[0043] Figure 13 is a schematic diagram of the spray arm assembly provided by the embodiment of the present disclosure rotating 180° from the initial position;

[0044] Figure 14 is the spray trajectory of the spray arm assembly provided by the embodiment of the present disclosure.

[0045] Icon: 100 - spray trajectory; 101 - incomplete gear; 102 - secondary spray arm; 103 - main spray arm; 104 - machine frame; 105 - toothed section; 106 - spray arm seat; 107 - water supply channel; 108 - water inlet channel; 109 - limiting part; 110 - limiting mating part; 111 - spray arm gear; 112 - connecting shaft; 113 - through hole; 114 - sleeve; 115 - first limiting protrusion; 116 - first limiting groove; 117 - second limiting protrusion; 118 - second limiting groove; 121 - first driving gear; 122 - second driving gear; 123 - third driving gear; 124 - first stopper; 1241 - arc edge; 125 - second stopper; 126 - first fixing part; 127 - first fixing mating part; 128 - second fixing part; 129 - second fixing mating part; 130 - dishwasher inner tank. Detailed implementation manners

[0046] Next, the technical solutions of the present disclosure will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0047] In the description of the present disclosure, it should be noted that when terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present disclosure. In addition, when terms such as "first", "second", "third" appear, they are only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] In the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, when terms such as "installation", "connection", "coupling" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0049] See Figures 1 to 14 As shown, this embodiment provides a spray arm assembly, including an incomplete gear 101 and a secondary spray arm 102. The incomplete gear 101 is in transmission connection with the secondary spray arm 102, so that the secondary spray arm 102 can rotate in the dishwasher inner tank 130, and during the rotation, the spray trajectory of the secondary spray arm 102 covers the four corners of the dishwasher inner tank 130.

[0050] Based on this structure, for the spray arm assembly provided in this embodiment, through the transmission connection between the incomplete gear 101 and the secondary spray arm 102, the secondary spray arm 102 can rotate in the dishwasher inner tank 130. At the same time, during the rotation, the spray trajectory of the secondary spray arm 102 can cover the four corners of the dishwasher inner tank 130, thereby spraying and cleaning the tableware at the four corners of the dishwasher inner tank 130, improving the cleaning effect.

[0051] Furthermore, in some optional embodiments, see Figure 1 As shown, the spray arm assembly further includes a main spray arm 103, and the secondary spray arm 102 is rotatably connected to the main spray arm 103.

[0052] The main spray arm 103 is provided with spray holes. The spraying trajectory 100 of the main spray arm 103 is circular. The secondary spray arm 102 is rotatably connected to the main spray arm 103. When the main spray arm 103 rotates, it drives the secondary spray arm 102 to rotate around the axis of the main spray arm 103. At the same time, the secondary spray arm 102 can rotate around its own axis through transmission connection with the incomplete gear 101. When the main spray arm 103 rotates to a position where its length direction substantially coincides with the diagonal of the dishwasher inner tank 130, the length direction of the secondary spray arm 102 is the same as that of the main spray arm 103, which is equivalent to lengthening the main spray arm 103. At this time, the secondary spray arm 102 can extend to the corner of the dishwasher inner tank 130 to spray and clean the tableware in this corner.

[0053] Further, in some alternative embodiments, the number of the secondary spray arms 102 is two, and the two secondary spray arms 102 are respectively arranged at both ends of the main spray arm 103; the center line of the main spray arm 103 coincides with the center line of the incomplete gear 101.

[0054] Specifically, the two secondary spray arms 102 are symmetrically arranged at both ends of the main spray arm 103. When the main spray arm 103 rotates, it rotates around the center of the incomplete gear 101, and the running resistance is relatively small.

[0055] It should be noted that the number of the secondary spray arms 102 can also be one. The secondary spray arm 102 is rotatably connected to one end of the main spray arm 103, and the center line of the main spray arm 103 coincides with the center line of the incomplete gear 101.

[0056] In some alternative embodiments, the spray arm assembly further includes a frame 104. The frame 104 has a receiving cavity, and the incomplete gear 101 is located in the receiving cavity. The main spray arm 103 is fixedly connected to the frame 104.

[0057] It should be noted that the incomplete gear 101 can also be arranged in the inner cavity of the main spray arm 103.

[0058] Further, in some alternative embodiments, the spray arm assembly further includes a spray arm seat 106. The gear shaft of the incomplete gear 101 is fixedly connected to the spray arm seat 106.

[0059] See Figure 4 As shown, the spray arm seat 106 is provided with a water supply channel 107, and the incomplete gear 101 is provided with a water inlet channel 108. Both the water supply channel 107 and the water inlet channel 108 are communicated with the inner cavity of the main spray arm 103.

[0060] The rack 104 is provided with a through hole, and the gear shaft of the incomplete gear 101 passes through the through hole and is fixedly connected to the spray arm base 106. When the spray arm assembly is working, water flows from the water supply channel 107 into the water inlet channel 108, then into the inner cavity of the main spray arm 103, and is ejected from the spray holes of the main spray arm 103. Driven by the reaction force of the water flow, the main spray arm 103 starts to rotate around its own axis, and the secondary spray arm 102 rotates with the main spray arm 103. Since the incomplete gear 101 is fixed, the secondary spray arm 102 can rotate relative to the incomplete gear 101. Through the transmission relationship, the secondary spray arm 102 can rotate around its own axis and extend to the four corners of the dishwasher inner cavity 130.

[0061] Further, in some alternative embodiments, the spray arm base 106 is provided with a receiving groove, the groove wall of the receiving groove is provided with a limiting portion 109, and the circumferential surface of the gear shaft of the incomplete gear 101 is provided with a limiting and mating portion 110. The limiting portion 109 and the limiting and mating portion 110 cooperate to fix the gear shaft in the receiving groove.

[0062] Specifically, the cross-sectional shape of the receiving groove is circular, and the bottom of the receiving groove is provided with a water inlet, which is communicated with the water supply channel 107.

[0063] In a possible design, as shown in Figure 3 Shown, the limiting portion 109 is a limiting groove, and the limiting and mating portion 110 is a limiting rib. Optionally, the number of limiting grooves is four, and the four limiting grooves are evenly spaced on the inner surface of the groove wall of the receiving groove. The length direction of the limiting groove is parallel to the axial direction of the receiving groove. Correspondingly, the number of limiting ribs is also four, and the positions of the limiting ribs correspond to the positions of the limiting grooves one by one. The limiting ribs are limited in the limiting grooves, which can prevent the incomplete gear 101 from rotating.

[0064] In another possible design, the limiting portion 109 is a limiting rib, and the limiting and mating portion 110 is a limiting groove.

[0065] Further, in some alternative embodiments, the secondary spray arm 102 is provided with a spray arm gear 111, and the transmission ratio between the incomplete gear 101 and the spray arm gear 111 is not greater than 1:4. In this way, it can be ensured that the spray trajectory 100 of the secondary spray arm 102 is generated outside the original circular spray trajectory 100. The spray trajectory 100 of the secondary spray arm 102 is an arc protruding towards the inner wall of the dishwasher inner cavity 130, that is, the spray trajectory 100 of the secondary spray arm 102 is closer to the four corners of the dishwasher inner cavity 130.

[0066] Further, in some alternative embodiments, the secondary spray arm 102 is connected to the main spray arm 103 through the connecting shaft 112 of the spray arm gear 111. Among them, the connecting shaft 112 can be tubular, as shown in Figure 6As shown, through holes 113 are provided on the circumferential side wall of the connecting shaft 112, and the inner cavities of the secondary spray arm 102 and the main spray arm 103 are both communicated with the inner cavity of the connecting shaft 112.

[0067] Specifically, the spray arm gear 111 is arranged in the accommodating cavity of the frame 104. The secondary spray arm 102 is located outside the main spray arm 103. In this embodiment, the secondary spray arm 102 is located on the side of the main spray arm 103 away from the frame 104. The main spray arm 103 is provided with a mounting hole, and the connecting shaft 112 of the spray arm gear 111 passes through the mounting hole. The secondary spray arm 102 is fixedly connected to the spray arm gear 111.

[0068] Further, in some alternative embodiments, as shown in Figure 5 the secondary spray arm 102 is provided with a sleeve 114, and the axis of the sleeve 114 coincides with the center line of the secondary spray arm 102.

[0069] Wherein, a first limiting protrusion 115 may be provided on the inner wall of the sleeve 114. The first limiting protrusion 115 extends along the axial direction of the sleeve 114. A first limiting groove 116 that cooperates with the first limiting protrusion 115 is provided on the circumferential surface of the connecting shaft 112; a second limiting protrusion 117 is provided on the inner wall of the sleeve 114. The second limiting protrusion 117 extends along the circumferential direction of the sleeve 114. A second limiting groove 118 that cooperates with the second limiting protrusion 117 is provided on the circumferential surface of the connecting shaft 112.

[0070] Optionally, the number of the first limiting protrusions 115 is two, and the two first limiting protrusions 115 are symmetrically arranged along the radial direction of the sleeve 114. The number of the first limiting grooves 116 is also two, and the two first limiting grooves 116 are symmetrically arranged along the radial direction of the connecting shaft 112. The connecting shaft 112 passes through the sleeve 114, and the first limiting protrusion 115 is limited in the first limiting groove 116, so as to prevent the secondary spray arm 102 from rotating relative to the connecting shaft 112.

[0071] The second limiting protrusion 117 may be an annular protrusion. In this embodiment, the second limiting protrusion 117 includes two arc-shaped protrusions, and the two arc-shaped protrusions and the two first limiting protrusions 115 are alternately arranged along the circumferential direction of the sleeve 114. The second limiting groove 118 is an annular groove, and the second limiting groove 118 is communicated with the first limiting groove 116. The connecting shaft 112 passes through the sleeve 114, and the second limiting protrusion 117 is limited in the second limiting groove 118, so as to prevent the secondary spray arm 102 from separating from the spray arm gear 111.

[0072] Optionally, in this embodiment, the incomplete gear 101 is in transmission connection with the spray arm gear 111 through a transmission mechanism, and the transmission ratio between the incomplete gear 101 and the spray arm gear 111 is 1:4.

[0073] Further, in some alternative embodiments, the transmission mechanism includes a first transmission gear 121, a second transmission gear 122, and a third transmission gear 123, and the first transmission gear 121, the second transmission gear 122, and the third transmission gear 123 are identical; four toothed segments 105 are evenly spaced on the circumferential surface of the incomplete gear 101, the first transmission gear 121 meshes with the toothed segment 105, and the third transmission gear 123 meshes with the spray arm gear 111; the transmission ratio between the incomplete gear 101 and the first transmission gear 121 is 1:2, and the transmission ratio between the third transmission gear 123 and the spray arm gear 111 is 1:2.

[0074] In this embodiment, the number of transmission mechanisms is two, and the two secondary spray arms 102 are respectively drivingly connected to the incomplete gear 101 through a transmission mechanism.

[0075] Further, in some alternative embodiments, a first stop 124 is fixedly arranged on the incomplete gear 101, a second stop 125 connected to the secondary spray arm 102 is arranged on one side of the first stop 124, and the first stop 124 and the second stop 125 cooperate to limit the movement of the secondary spray arm 102.

[0076] When the secondary spray arm 102 is provided with a spray arm gear 111 and the incomplete gear 101 is drivingly connected to the spray arm gear 111 through a transmission mechanism, the second stop 125 can be arranged on the transmission mechanism so as to be connected to the secondary spray arm 102 through the transmission mechanism. Further, the second stop 125 can be fixedly arranged on the first transmission gear 121 in the transmission mechanism.

[0077] The first stop 124 is located between two adjacent toothed segments 105, and the outer contour of the second stop 125 is inside the root circle of the teeth of the first transmission gear 121, ensuring that the first transmission gear 121 can mesh with the toothed segment 105 of the incomplete gear 101.

[0078] When the first transmission gear 121 is separated from the toothed segment 105, the first stop 124 can cooperate with the second stop 125, and at this time, the secondary spray arm 102 stops rotating.

[0079] Figure 8 The dash line in... represents one diagonal line, and the double dash line represents the other diagonal line.

[0080] During use, the spray arm assembly is installed in the dishwasher inner tank 130. Currently, the dishwasher inner tank 130 is usually a square inner tank. Refer to Figure 8As shown, at the initial position, the angle θ between the length direction of the main spray arm 103 and the diagonal of the inner tank is 22.5°. The length directions of the secondary spray arms 102 are perpendicular to the length direction of the main spray arm 103. The first stopper 124 and the second stopper 125 cooperate, and the incomplete gear 101 and the first transmission gear 121 are just about to start meshing. Driven by water flow, the main spray arm 103 starts to rotate. In this embodiment, the main spray arm 103 rotates in the direction of arrow A.

[0081] See Figure 9 As shown, after the main spray arm 103 starts to rotate, the first stopper 124 and the second stopper 125 separate, and the toothed section 105 of the incomplete gear 101 meshes with the first transmission gear 121, thereby driving the spray arm gear 111 to rotate. When the first transmission gear 121 rotates 22.5°, the length direction of the main spray arm 103 is generally aligned with the diagonal of the inner tank. Since the transmission ratio between the incomplete gear 101 and the spray arm gear 111 is 1:4, the spray arm gear 111 rotates 90°, so that the spray arm gear 111 and the main spray arm 103 are both on a diagonal of the inner tank and the overall length is the longest, thereby ensuring the cleaning of the two diagonals of the inner tank.

[0082] See Figure 10 As shown, when the first transmission gear 121 continues to rotate 22.5°, the spray arm gear 111 rotates another 90°, and the length direction of the secondary spray arm 102 returns to the state perpendicular to the length direction of the main spray arm 103, so that the overall length of the main spray arm 103 and the secondary spray arms 102 is the shortest, facilitating smooth passage through the narrowest part of the dishwasher inner tank 130 and avoiding collision with the two opposite side walls of the dishwasher inner tank 130. At this time, the first stopper 124 and the second stopper 125 come into contact again, and the first transmission gear 121 is about to separate from the toothed section 105 of the incomplete gear 101. As the main spray arm 103 rotates, the first stopper 124 and the second stopper 125 slide relative to each other, the first transmission gear 121 does not rotate, and the secondary spray arms 102 do not rotate. See Figure 11 As shown, when the main spray arm 103 rotates 45°, the first stopper 124 is about to separate from the second stopper 125, and the incomplete gear 101 and the first transmission gear 121 start to mesh again.

[0083] See Figure 12 As shown, when the first transmission gear 121 continues to rotate 22.5°, the length direction of the main spray arm 103 is generally aligned with the diagonal of the dishwasher inner tank 130, and the spray arm gear 111 rotates 90°, so that the secondary spray arms 102 and the main spray arm 103 are both on the other diagonal of the inner tank and the overall length is the longest, thereby ensuring the cleaning of the other two diagonals of the inner tank.

[0084] Then the main spray arm 103 continues to rotate. SeeFigure 13 As shown, when the main spray arm 103 rotates to an angle θ between the length direction thereof and the diagonal line of the inner tank ( Figure 13 shown by the dotted line in the figure) of 22.5°, the main spray arm 103 rotates 180° from the initial position, and then the above process is repeated until the main spray arm 103 rotates 360°. At this time, the spraying trajectory 100 is as Figure 14 shown. When the main spray arm 103 rotates 360°, it can complete the cleaning of the four corners of the inner tank twice, improving the cleaning effect and the cleaning efficiency.

[0085] Further, in some optional embodiments, the first stopper 124 includes four stopper pieces. The four stopper pieces are evenly spaced along the axis of the incomplete gear 101, and the four stopper pieces all have arc-shaped edges 1241 coaxially arranged with the incomplete gear 101. The radius of the arc-shaped edge 1241 is greater than the radius of the incomplete gear 101; the arc-shaped edge 1241 of the stopper piece can be adapted to the edge of the second stopper 125 after the incomplete gear 101 is disengaged from the transmission connection with the secondary spray arm 102.

[0086] Since the circumferential side of the incomplete gear 101 is not fully covered with teeth, there is a part of the incomplete gear 101 without teeth rotating to one side of the secondary spray arm 102. At this time, the incomplete gear 101 is disengaged from the transmission connection with the secondary spray arm 102.

[0087] Specifically, if the secondary spray arm 102 is provided with a spray arm gear 111, the incomplete gear 101 is in transmission connection with the spray arm gear 111 through a transmission mechanism and the transmission mechanism includes a first transmission gear 121, when the incomplete gear 101 is disengaged from the transmission connection with the secondary spray arm 102, the first transmission gear 121 is separated from the toothed section 105 of the incomplete gear 101.

[0088] Wherein, the second stopper 125 can be in a quasi-square shape, and the four edges of the second stopper 125 are bent towards the direction close to the center of the second stopper 125.

[0089] Optionally, the radian of the arc-shaped edge 1241 of the stopper piece is the same as the radian of the edge of the second stopper 125. After the first transmission gear 121 is separated from the toothed section 105 of the incomplete gear 101, as the main spray arm 103 rotates, the arc-shaped edge 1241 of the stopper piece can fit and slide with the edge of the second stopper 125, ensuring that the first transmission gear 121 does not rotate and the secondary spray arm 102 does not rotate.

[0090] Optionally, the incomplete gear 101 is provided with a first fixing portion 126, and the first stopper 124 is provided with a first fixing and cooperating portion 127. The first fixing portion 126 and the first fixing and cooperating portion 127 cooperate to fix the first stopper 124 on the incomplete gear 101.

[0091] In a possible design, as shown in Figure 2 FIG. [not shown], the first fixing portion 126 is a pin shaft, and the first fixing and mating portion 127 is a pin hole. Optionally, the number of pin shafts is two, and the two pin shafts are symmetrically arranged on both sides of the gear shaft along the radial direction of the incomplete gear 101. The number of pin holes is also two, and the two pin holes are respectively arranged on two opposite stop pieces.

[0092] In another possible design, the first fixing portion 126 is a pin hole, and the first fixing and mating portion 127 is a pin shaft.

[0093] Further, in some alternative embodiments, the spray arm assembly further includes a second fixing portion 128. The secondary spray arm 102 is connected to the second fixing portion 128. The second stopper 125 is provided with a second fixing and mating portion 129. The second fixing portion 128 cooperates with the second fixing portion 128 to connect the second stopper 125 to the secondary spray arm 102.

[0094] Specifically, when the secondary spray arm 102 is provided with a spray arm gear 111, and the incomplete gear 101 is drivingly connected to the spray arm gear 111 through a transmission mechanism and the transmission mechanism includes a first transmission gear 121, the second fixing portion 128 can be fixedly arranged on the first transmission gear 121. At this time, the second fixing portion 128 is connected to the secondary spray arm 102 through the first transmission gear 121. The second fixing portion 128 is used to cooperate with the second fixing and mating portion 129 to fix the second stopper 125 on the first transmission gear 121.

[0095] In a possible design, as shown in Figure 2 FIG. [not shown], the second fixing portion 128 is a pin shaft, and the second fixing and mating portion 129 is a pin hole.

[0096] In another possible design, the second fixing portion 128 is a pin hole, and the second fixing and mating portion 129 is a pin shaft.

[0097] Optionally, the four stop pieces in this embodiment are integrally formed.

[0098] This embodiment further provides a dishwasher, including the spray arm assembly provided in this embodiment.

[0099] For the dishwasher provided in this embodiment, since the spray arm assembly provided in this embodiment is used, during the process of washing tableware, the secondary spray arm 102 can extend to the four corners of the dishwasher inner tank 130, so as to spray and wash the tableware at the four corners of the dishwasher inner tank 130, improving the washing effect.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A spray arm assembly, characterized in that, It includes an incomplete gear (101) and a secondary spray arm (102). The incomplete gear (101) is in transmission connection with the secondary spray arm (102) so that the secondary spray arm (102) can rotate in the inner liner (130) of the dishwasher, and during the rotation, the spray trajectory of the secondary spray arm (102) covers the four corners of the inner liner (130) of the dishwasher. The spray arm assembly further includes a main spray arm (103), and the secondary spray arm (102) is rotatably connected to the main spray arm (103). The spray arm assembly further includes a frame (104). The frame (104) has a receiving cavity. The incomplete gear (101) is located in the receiving cavity. The main spray arm (103) is fixedly connected to the frame (104). The frame (104) is provided with a through hole, and the gear shaft of the incomplete gear (101) passes through the through hole and is fixedly connected to a spray arm seat (106). The secondary spray arm (102) is provided with a spray arm gear (111). The incomplete gear (101) is in transmission connection with the spray arm gear (111) through a transmission mechanism. The transmission mechanism includes a first transmission gear (121), a second transmission gear (122), and a third transmission gear (123). Four toothed segments (105) are evenly spaced on the circumferential surface of the incomplete gear (101). The first transmission gear (121) meshes with the toothed segment (105), and the third transmission gear (123) meshes with the spray arm gear (111). When the spray arm assembly is working, the main spray arm (103) rotates around its own axis. After the main spray arm (103) starts to rotate, when the toothed segment (105) of the incomplete gear (101) meshes with the first transmission gear (121), the spray arm gear (111) rotates.

2. The spray arm assembly according to claim 1, characterized in that, The transmission ratio between the incomplete gear (101) and the spray arm gear (111) is not greater than 1:

4.

3. The spray arm assembly according to claim 2, wherein The transmission ratio between the incomplete gear (101) and the spray arm gear (111) is 1:

4.

4. The spray arm assembly according to claim 1, wherein, The incomplete gear (101) is fixedly provided with a first stop member (124). One side of the first stop member (124) is provided with a second stop member (125) connected to the secondary spray arm (102). The first stop member (124) cooperates with the second stop member (125) to limit the movement of the secondary spray arm (102).

5. The spray arm assembly according to claim 4, characterized in that, The first stop member (124) includes four stop pieces. The four stop pieces are evenly spaced along the axis of the incomplete gear (101), and each of the four stop pieces has an arc-shaped edge (1241) coaxially arranged with the incomplete gear (101). The radius of the arc-shaped edge (1241) is greater than the radius of the incomplete gear (101). The arc-shaped edge (1241) of the stop piece can be adapted to the edge of the second stop member (125) after the incomplete gear (101) is disengaged from the transmission connection with the secondary spray arm (102).

6. The spray arm assembly according to claim 5, characterized in that, The second stopper (125) is approximately square-shaped, and the four edges of the second stopper (125) are bent towards the direction close to the center of the second stopper (125).

7. The spray arm assembly according to claim 4, wherein, The incomplete gear (101) is provided with a first fixing portion (126), the first stopper (124) is provided with a first fixing mating portion (127), and the first fixing portion (126) is engaged with the first fixing mating portion (127) to fix the first stopper (124) on the incomplete gear (101).

8. The spray arm assembly according to claim 7, wherein, The first fixing portion (126) is a pin shaft, and the first fixing mating portion (127) is a pin hole, or the first fixing portion (126) is a pin hole, and the first fixing mating portion (127) is a pin shaft.

9. The spray arm assembly according to claim 4, wherein, It further includes a second fixing portion (128), the secondary spray arm (102) is connected to the second fixing portion (128), the second stopper (125) is provided with a second fixing mating portion (129), and the second fixing portion (128) is engaged with the second fixing mating portion (129) to connect the second stopper (125) with the secondary spray arm (102).

10. The spray arm assembly according to claim 9, characterized in that, The second fixing portion (128) is a pin shaft, and the second fixing mating portion (129) is a pin hole, or the second fixing portion (128) is a pin hole, and the second fixing mating portion (129) is a pin shaft.

11. The spray arm assembly according to claim 6, characterized in that, The four stoppers are integrally formed.

12. The spray arm assembly according to claim 3, characterized in that, The first transmission gear (121), the second transmission gear (122) and the third transmission gear (123) are the same; The transmission ratio between the incomplete gear (101) and the first transmission gear (121) is 1:2, and the transmission ratio between the third transmission gear (123) and the spray arm gear (111) is 1:

2.

13. The spray arm assembly according to any one of claims 1 to 12, characterized in that, The number of the secondary spray arms (102) is two, and the two secondary spray arms (102) are respectively arranged at both ends of the main spray arm (103); the center line of the main spray arm (103) coincides with the center line of the incomplete gear (101).

14. The spray arm assembly according to any one of claims 1 to 12, characterized in that, The spray arm seat (106) is provided with a receiving groove, the groove wall of the receiving groove is provided with a limiting portion (109), the circumferential surface of the gear shaft of the incomplete gear (101) is provided with a limiting mating portion (110), and the limiting portion (109) is engaged with the limiting mating portion (110) to fix the gear shaft in the receiving groove.

15. The spray arm assembly according to any one of claims 1 to 12, characterized in that, The secondary spray arm (102) is connected to the main spray arm (103) through the connecting shaft (112) of the spray arm gear (111), through holes (113) are arranged on the circumferential side wall of the connecting shaft (112), and the inner cavities of the secondary spray arm (102) and the main spray arm (103) are both communicated with the inner cavity of the connecting shaft (112).

16. The spray arm assembly according to claim 15, wherein, The secondary spray arm (102) is provided with a sleeve (114), and the axis of the sleeve (114) coincides with the center line of the secondary spray arm (102).

17. The spray arm assembly according to claim 16, wherein, The inner wall of the sleeve (114) is provided with a first limiting protrusion (115), the first limiting protrusion (115) extends along the axial direction of the sleeve (114), and a first limiting groove (116) that cooperates with the first limiting protrusion (115) is provided on the circumferential surface of the connecting shaft (112); the inner wall of the sleeve (114) is provided with a second limiting protrusion (117), the second limiting protrusion (117) extends along the circumferential direction of the sleeve (114), and a second limiting groove (118) that cooperates with the second limiting protrusion (117) is provided on the circumferential surface of the connecting shaft (112).

18. A dishwasher, characterized in that, Comprising the spray arm assembly according to any one of claims 1 to 17.

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