CN218128462U - Spray arm assembly and dish washing machine - Google Patents

Abstract

The utility model discloses a spray arm subassembly and dish washer, the spray arm subassembly includes spray arm seat, pivot, main spray arm, vice spray arm and transmission, the spray arm seat has the centre bore, the pivot is worn to locate the centre bore, main spray arm fixed connection is in the tip of pivot, main spray arm is provided with the second shaft, vice spray arm, rotate and connect in main spray arm; the transmission device comprises a central gear, a turntable gear and a pinion, wherein the central gear is sleeved in the middle of the rotating shaft, the pinion is sleeved in the second shaft, the central gear is relatively fixed with the spray arm seat, the turntable gear can rotate relative to the rotating shaft, the central gear and the turntable gear are both meshed with the pinion, the number of teeth of the central gear is different from that of teeth of the turntable gear by one, the turntable gear is provided with a trigger part, and the trigger part is used for pushing the auxiliary spray arm to rotate so as to change the water spraying direction. The small gear revolves around the central gear and rotates simultaneously, the small gear rotates for a circle around the central gear, the turntable gear rotates for an angle corresponding to one tooth, and the turntable gear pushes the auxiliary spraying arm to rotate through the trigger part so as to enable the spraying water to swing.

Description

Spray arm assembly and dish washing machine

Technical Field

The utility model relates to the technical field of household appliances, in particular to spray arm subassembly and dish washer.

Background

With the improvement of living standard, dish washing machines capable of freeing hands are gradually becoming standard for quality life. Compared with the traditional hand washing, the dish washing machine has the advantages of cleaning, sterilizing, saving water and labor and the like. The dish washer generally adopts a spraying mode, under the driving of a washing pump, water flow sprays through a rotating spray arm component to wash the surface of the tableware, and the cleaning effect of the dish washer is closely related to the design of the spray arm.

In the related art, the spray arm assembly has a single spraying effect and a poor scouring effect, and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a spray arm subassembly can effectively improve the washing effect to the tableware.

The utility model discloses provide above-mentioned spray arm subassembly's dish washer simultaneously.

According to the utility model discloses spray arm subassembly of first aspect embodiment, including spray arm seat, pivot, main spray arm, vice spray arm and transmission, the spray arm seat has the centre bore, the pivot is worn to locate in the centre bore, main spray arm fixed connection is in the tip of pivot, main spray arm is provided with the secondary shaft, vice spray arm, rotate and connect in main spray arm; the transmission device comprises a central gear, a turntable gear and a pinion, wherein the central gear is sleeved in the middle of the rotating shaft, the pinion is sleeved in the second shaft, the central gear and the spray arm seat are relatively fixed, the turntable gear can rotate relative to the rotating shaft, the central gear and the turntable gear are both meshed with the pinion, the number of teeth of the central gear is different from that of teeth of the turntable gear by one, the turntable gear is provided with a trigger part, and the trigger part is used for pushing the auxiliary spray arm to rotate so as to change the water spraying direction.

According to the utility model discloses spray arm subassembly of first aspect embodiment has following beneficial effect at least: the main spray arm and the auxiliary spray arm drive the rotating shaft to rotate, namely, the second shaft also rotates around the rotating shaft, because the central gear is fixed, therefore, the pinion not only revolves around the central gear, but also rotates simultaneously, the central gear and the turntable gear differ by one tooth, according to the Fragren gear transmission paradox, the pinion rotates a circle around the central gear, then the turntable gear rotates an angle corresponding to one tooth, namely, the turntable gear rotates slowly, the turntable gear pushes the auxiliary spray arm to rotate through the trigger part, thereby the water flow sprayed by the auxiliary spray arm swings, tableware is washed from different angles, the washing effect on the tableware is effectively improved, and the washing efficiency of the dish washing machine is improved.

According to some embodiments of the first aspect of the present invention, the trigger portion is a first protrusion disposed on the face of the turntable gear, the first protrusion faces the auxiliary spray arm, and the auxiliary spray arm is provided with a second protrusion cooperating with the first protrusion.

According to some embodiments of the first aspect of the present invention, the axis of rotation of the auxiliary spray arm is perpendicular to the axis of the rotary shaft, and the second protrusion is located at a side of the auxiliary spray arm.

According to some embodiments of the first aspect of the present invention, the carousel gear is provided with a plurality of the first protrusions, a plurality of the first protrusions are along the circumferential distribution of the carousel gear.

According to some embodiments of the first aspect of the present invention, the periphery of the carousel gear is provided with an annular sideboard, a plurality of the first protrusion set up in the annular sideboard.

According to the utility model discloses some embodiments of first aspect, sun gear is provided with a plurality of extension boards, and is a plurality of the extension board centers on spout the arm seat, the extension board is provided with first buckle, it is provided with the second buckle of the first buckle of cooperation to spout the arm seat.

According to some embodiments of the first aspect of the present invention, the outer wall of the rotating shaft is provided with a support ring, the sun gear is provided with a recess cooperating with the support ring.

According to some embodiments of the first aspect of the present invention, the two end faces of the support ring respectively abut against the sun gear and the spray arm base.

According to some embodiments of the first aspect of the present invention, the turntable gear is provided with a collar facing the sun gear, the end face of the collar being an arc face and abutting the sun gear.

According to the utility model discloses some embodiments of the first aspect, the second buckle does the third of spray arm seat outer wall is protruding, sun gear is provided with a plurality of interval arrangement's locating plate, the third arch clamps between two adjacent locating plates.

According to the utility model discloses some embodiments of the first aspect, the tip outer wall of pivot is provided with bellied fixture block, main spray arm is provided with the cooperation the draw-in groove of fixture block.

According to the utility model discloses some embodiments of the first aspect, the tip of pivot is provided with the neck that contracts in, the fixture block is located the outer wall of neck, main spray arm is provided with and is used for holding the storage tank of neck.

According to the utility model discloses some embodiments of first aspect, the sun gear with the centre bore inner wall of carousel gear all is provided with dodges the groove so that the fixture block passes.

According to the utility model discloses some embodiments of the first aspect, the second shaft is provided with axial elastic groove, the outer wall of second shaft is provided with keeps off the ring, the diameter that keeps off the ring is greater than the centre bore diameter of pinion, the periphery that keeps off the ring is provided with the direction inclined plane.

According to some embodiments of the first aspect of the present invention, the axis of rotation of the secondary spray arm is perpendicular to the axis of the rotation shaft.

The dishwasher according to the second aspect of the present invention comprises the spray arm assembly as described in the first aspect of the present invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a spray arm assembly according to an embodiment of the present invention;

fig. 2 is a first exploded view of a spray arm assembly according to an embodiment of the present invention;

fig. 3 is a second exploded view of the spray arm assembly according to the first embodiment of the present invention;

fig. 4 is a main perspective sectional view of a spray arm assembly according to an embodiment of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is a bottom view of the spray arm assembly in accordance with an embodiment of the first aspect of the present invention;

fig. 7 is a left side view of a spray arm assembly in accordance with an embodiment of the first aspect of the present invention;

fig. 8 is a schematic structural view of the spray arm seat in the first embodiment of the present invention;

fig. 9 is a schematic structural view of a rotating shaft in an embodiment of the first aspect of the present invention;

fig. 10 is a schematic structural view of a sun gear according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a turntable gear in an embodiment of the first aspect of the present invention;

fig. 12 is a schematic structural view of the main spray arm in the first embodiment of the present invention.

The reference numbers are as follows:

the spray arm comprises a spray arm seat 100, a central hole 101, a second buckle 102 and a limiting ring 103;

the rotating shaft 200, the water delivery channel 201, the support ring 202, the fixture block 203, the neck 204 and the convex edge 205;

the nozzle comprises a main spray arm 300, a first cavity 301, a first spray hole 302, a mounting seat 310, a mounting column 311, an inner cavity 312, a clamping groove 313, a second shaft 320, a retaining ring 321 and an elastic groove 322;

the auxiliary spray arm 400, the second cavity 401, the second spray hole 402, the bearing 410 and the second protrusion 420;

the gear 500, the central gear 510, the support plate 511, the first buckle 512, the groove 513, the positioning plate 514, the turntable gear 520, the trigger 521, the annular side plate 522, the annular rib 523, the convex ring 524 and the pinion 530.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The dish washer is used to automatically clean tableware such as dish, chopsticks, dish, knife and fork. The full-automatic dish washing machine on the market can be divided into two types of families, such as household dish washing machines and commercial dish washing machines, the household dish washing machines are suitable for most of families at present, the dish washing machines can replace hand washing, hands of people are liberated, and the dish washing machines gradually become standard preparations of quality life. Compared with the traditional hand washing of bowls and chopsticks, the dish washing machine has the advantages of cleaning, sterilization, water and labor saving and the like. In the related art, a dish washing machine generally adopts a cleaning mode that a spray arm component sprays, water flow sprays through the rotary spray arm component under the driving of a washing pump to wash the surface of tableware, the cleaning effect of the dish washing machine is closely related to the design of the spray arm, and the existing spray arm component has single spraying effect and poor washing effect and needs to be improved.

Referring to fig. 1 to 5, the embodiment of the first aspect of the present invention provides a spray arm assembly for a dishwasher, the dishwasher generally has an upper spray arm assembly and a lower spray arm assembly, and the dishware is washed from an upper direction and a lower direction respectively, the spray arm assembly of the first aspect of the present invention can be used as the upper spray arm assembly or the lower spray arm assembly, the following spray arm assembly is described as an example, the spray arm assembly includes a spray arm base 100, a rotating shaft 200, a main spray arm 300 and an auxiliary spray arm 400, the spray arm base 100 is used for being fixedly mounted on the dishwasher, is a mounting base of the spray arm assembly, the spray arm base 100 is stationary in operation, the center of the spray arm assembly is provided with a through center hole 101, the rotating shaft 200 is mounted in the center hole 101 and can rotate, the rotating shaft 200 is provided with a water delivery passage 201 arranged along an axial direction inside, the water delivery passage 201 runs through to both ends of the rotating shaft 200, the main spray arm 300 has a mounting base 310, the mounting base 310 is fixedly connected to the upper end of the rotating shaft 200, the mounting base 310 is provided with a mounting post 311, a bearing 410 is mounted on the mounting post 311, the auxiliary spray arm 400 is mounted on the rotating shaft 410, and the rotating shaft 410, the rotating shaft 400 is perpendicular to rotate the auxiliary spray arm 400, and the rotating shaft 410.

It can be understood that the main spray arm 300 is formed with a first cavity 301 therein, the sub spray arm 400 is formed with a second cavity 401 therein, the mounting seat 310 is provided with an inner cavity 312, the first cavity 301 and the second cavity 401 are communicated with the water delivery passage 201 through the inner cavity 312, the main spray arm 300 is formed with a plurality of first spray holes 302 communicated with the first cavity 301, the sub spray arm 400 is formed with a plurality of second spray holes 402 communicated with the second cavity 401, and the washing water path is inputted from the water delivery passage 201 of the rotation shaft 200, branched to the first cavity 301 of the main spray arm 300 and the second cavity 401 of the sub spray arm 400, and then sprayed from the first spray holes 302 and the second spray holes 402 to spray-wash dishes.

As shown in fig. 1, the main spray arm 300 is provided with five first spray holes 302, the directions of the five first spray holes 302 are consistent and inclined, and the high-speed water flow sprayed from the five first spray holes 302 washes the dishes corresponding to the rotation direction of the rotating shaft 200, so that the uniform spraying effect is achieved; the auxiliary spray arm 400 is provided with five second spray holes 402, the orientation of the five second spray holes 402 is inclined, along the direction far away from the mounting seat 310, the spray directions of the 1 st and the 2 nd second spray holes 402 are consistent and face inwards, the spray directions of the 3 rd and the 4 th second spray holes 402 are consistent and face outwards, the spray direction of the 5 th spray hole is an axis far away from the rotating shaft 200, when the auxiliary spray arm 400 rotates, the five second spray holes 402 spray water flows in various directions, washing in various directions is applied to tableware, and the washing effect is better.

The spray arm assembly is connected with a transmission device 500, the transmission device 500 comprises a central gear 510, a turntable gear 520 and a pinion 530, the central gear 510 and the turntable gear 520 are sleeved on the middle part of the rotating shaft 200, the main spray arm 300 is provided with a second shaft 320 parallel to the rotating shaft 200, the second shaft 320 is positioned on the outer side of the rotating shaft 200, and the pinion 530 is sleeved on the second shaft 320. Wherein the central gear 510 is fixed like the spray arm stand 100, the turntable gear 520 can freely rotate with respect to the rotation shaft 200, the pinion 530 can freely rotate with respect to the second shaft 320, both the central gear 510 and the turntable gear 520 are engaged with the pinion 530, and the central gear 510 has one more tooth or one less tooth than the turntable gear 520. It should be understood that, as shown in fig. 6, although the central gear 510 and the turntable gear 520 are different, the pitch of the central gear 510 and the turntable gear 520 are relatively close, and the meshing position between the central gear 510 and the turntable gear 520 and the pinion gear 530 is only 2 to 3 teeth, so that the central gear 510 and the turntable gear 520 can mesh with the pinion gear 530 at the same time and realize transmission.

It can be understood that the dial gear 520 is located above the sun gear 510 and close to the sub spray arm 400, the upper end surface of the dial gear 520 is provided with a trigger 521, and the trigger 521 is used for pushing the sub spray arm 400 to rotate around the mounting post 311, so that the direction of the water flow sprayed from the second spray hole 402 is changed.

It can be understood that the main spray arm 300 and the auxiliary spray arm 400 rotate the rotating shaft 200 under the reaction force of the water jet, that is, the second shaft 320 also rotates around the rotating shaft 200, because the central gear 510 is fixed, the pinion 530 both revolves around the central gear 510 and simultaneously rotates around the second shaft 320, the transmission device 500 is designed according to the frictionson gear transmission paradox, the pinion 530 rotates around the central gear 510, the number of teeth of the rotary plate gear 520 and the central gear 510 in cooperation with the pinion 530 is the same, because the central gear 510 has one tooth more than that of the rotary plate gear 520, the rotary plate gear 520 rotates by an angle corresponding to one tooth, that is, the rotary plate gear 520 rotates slowly relative to the central gear 510, and when the pinion 530 rotates around the central gear 510 by one circle, the rotary plate gear 520 rotates by one tooth, so that the rotary plate gear 520 and the auxiliary spray arm 400 rotate at different speeds, during the relative rotation, the rotary plate gear 520 pushes the auxiliary spray arm 400 to rotate around the mounting column 311 by a certain angle through the trigger 521, thereby making the second spray holes 402 of the auxiliary spray arm swing, the water jet, which can improve the washing efficiency of the dish washer, and can be beneficial to the dish washer to the improvement of the dish washer.

Referring to fig. 7, it can be understood that the trigger 521 is a first protrusion disposed on the turntable gear 520, the first protrusion extends toward the sub-spray arm 400 and has a curved surface in the shape of an arc, the sub-spray arm 400 is provided with a second protrusion 420, the second protrusion 420 protrudes toward the turntable gear 520, because the rotation speeds of the turntable gear 520 and the rotating shaft 200 are different and opposite, the two rotate relatively, and in the process of relative rotation, the first protrusion contacts with the second protrusion 420 to push the sub-spray arm 400 to rotate around the mounting post 311 by a certain angle, so that the water flow ejected from the second nozzle 402 of the sub-spray arm 400 swings, and the washing effect on the tableware is improved.

Referring to fig. 7, it can be appreciated that the second projection 420 is offset from the axis of the sub spray arm 400 and is disposed at a side of the sub spray arm 400. When the second protrusion 420 passes through the position of the first protrusion, since the second protrusion 420 is disposed at the side of the auxiliary spraying arm 400, the first protrusion pushes the auxiliary spraying arm 400 to rotate by a certain angle through the second protrusion 420, so that the water flow sprayed from the second spraying holes 402 swings, the washing angle is changed, and the washing effect on the tableware is improved.

Referring to fig. 11, it can be understood that five first protrusions are disposed on the upper end surface of the turntable gear 520, the five first protrusions are circumferentially distributed on the edge of the turntable gear 520, the five first protrusions may be evenly spaced and distributed, the turntable gear 520 rotates one circle relative to the rotating shaft 200, the turntable gear 520 pushes the auxiliary spray arm 400 to change the water spray direction five times through the five first protrusions, and the frequency of changing the water spray direction is also changed due to the different rotating speeds of the turntable gear 520 and the rotating shaft 200, so that various flushes are applied to the dishes, which is helpful for improving the flushing effect, and the washing is cleaner and faster. The five first bulges can also be distributed at uneven intervals, so that the change frequency of the water spraying direction is further changed, and the flushing effect is better.

Referring to fig. 11, it can be understood that an annular side plate 522 is disposed at the outer circumference of the turntable gear 520, the annular side plate 522 and five first protrusions are integrally formed on the turntable gear 520, and the annular side plate 522 serves as a reinforcing rib to improve the structural strength of the turntable gear 520. The upper end face of the turntable gear 520 is also provided with an annular convex rib 523, and the annular convex rib 523 surrounds the central hole of the turntable gear 520, so that the structural strength is increased, and the risk of breakage is reduced.

It can be understood that the triggering portion 521 can also be a convex edge disposed on the upper end surface, the upper edge of the convex edge is a continuously changing curved surface, the high point of the curved surface pushes the auxiliary spray arm 400 to rotate around the mounting post 311 by a certain angle when contacting the auxiliary spray arm 400, and the low point of the curved surface has a gap with the auxiliary spray arm 400, and does not contact the auxiliary spray arm 400. The water flow sprayed from the second spray holes 402 can swing, the washing angle is changed, and the washing effect on the tableware is improved.

Referring to fig. 2 to 5, it can be understood that a connection structure is provided between the sun gear 510 and the spray arm seat 100, the sun gear 510 is provided with a plurality of support plates 511 surrounding the spray arm seat 100, the support plates 511 are provided with first fasteners 512 towards the side walls of the spray arm seat 100, the outer wall of the spray arm seat 100 is provided with second fasteners 102, and after assembly, the first fasteners 512 of the support plates 511 fasten the second fasteners 102, so that the connection between the sun gear 510 and the spray arm seat 100 is realized, and the axial position of the sun gear 510 is also helped to be positioned.

Referring to fig. 2 to 5, it can be understood that a support ring 202 is formed on an outer wall of the rotation shaft 200 to be protruded radially, a recess 513 is formed on the sun gear 510, the support ring 202 is received in the recess 513, the support ring 202 is disposed below the sun gear 510, and the sun gear 510 is supported by the support ring 202 while defining an axial position. The upper end surface of the arm rest 100 abuts against the lower end surface of the support ring 202, and the arm rest 100 and the sun gear 510 sandwich the support ring 202. In the axial direction of the rotating shaft 200, the spray arm seat 100 supports the central gear 510 through the support ring 202, and the first catch 512 of the central gear 510 catches the second catch 102 of the spray arm seat 100, so as to connect the central gear 510, the rotating shaft 200 and the spray arm seat 100 into an integral structure. The contact surfaces of the support ring 202, the spray arm base 100 and the central gear 510 are smooth surfaces, which facilitates the smooth rotation of the rotating shaft 200.

It can be understood that the lower end surface of the dial gear 520 is provided with the protruding ring 524, the end surface of the protruding ring 524 is an arc surface, the arc surface abuts against the upper end surface of the sun gear 510, the upper end surface of the sun gear 510 is a smooth plane, and the friction between the protruding ring 524 and the upper end surface of the sun gear 510 is small, which is beneficial for the dial gear 520 to rotate. And the central gear 510 supports the turntable gear 520 by the convex ring 524, and the mounting seat 310 abuts against the upper end surface of the turntable gear 520, so as to define the turntable gear 520, and the position of the turntable gear 520 is stable, which is beneficial for the trigger part 521 to push the auxiliary spray arm 400 to rotate around the mounting column 311.

Referring to fig. 10, it can be understood that the sun gear 510 is provided with four positioning plates 514 surrounding the spray arm socket 100, the four positioning plates 514 are circumferentially spaced, as shown in fig. 8, the second catch 102 adopts a third protrusion on the outer wall of the spray arm socket 100, and the number of the second catches 102 is two, and two adjacent positioning plates 514 sandwich one third protrusion, thereby defining the relative angle of the sun gear 510 and the spray arm socket 100, so that the sun gear 510 is fixed with respect to the spray arm socket 100. The four positioning plates 514 surround and attach the spray arm base 100, which is beneficial to improving the stability of the central gear 510 and preventing shaking. Each positioning plate 514 is connected with the central gear 510 through a reinforcing rib, so that the structural strength and rigidity of the positioning plates 514 are improved.

Of course, the second latch 102 can also be a latch slot or pin on the outer wall of the spray arm base 100, and can also be matched with the first latch 512 for latching.

Referring to fig. 3 and 5, it can be understood that four circumferentially and uniformly distributed fixture blocks 203 are arranged on the outer wall of the upper end of the rotating shaft 200, the fixture blocks 203 protrude in the radial direction of the rotating shaft 200, the mounting seat 310 is provided with a fixture groove 313, and after the rotating shaft 200 is assembled with the mounting seat 310, the fixture blocks 203 are clamped in the fixture groove 313, so that the rotating shaft 200 is fixedly connected with the mounting seat 310. The opening of the clamping groove 313 is arranged on one side departing from the rotating direction of the mounting seat 310, the clamping block 203 cannot be separated after being arranged in the clamping groove 313, and the reliability of the use process is higher.

Referring to fig. 9, it can be understood that the upper end of the rotating shaft 200 is provided with a neck 204 which is retracted inward, four latches 203 are circumferentially and uniformly distributed on the outer wall of the neck 204, the mounting seat 310 is provided with an accommodating groove for accommodating the neck 204, and the locking groove 313 is arranged on the inner wall of the accommodating groove. When the main nozzle arm 300 is assembled, the mounting seat 310 is sleeved on the neck 204, the mounting seat 310 is limited in the radial direction, the clamping block 203 is arranged in the clamping groove 313, the mounting seat 310 is limited in the axial direction, and the rotating shaft 200 is fixedly connected with the main nozzle arm 300. Because the neck 204 is of a retraction structure, a step is formed at the lower end of the neck 204, and the step and the fixture block 203 cooperate to clamp a part of the mounting seat 310, so that the connection stability is further improved.

Referring to fig. 5 and 9, the outer wall of the rotating shaft 200 is further provided with two convex edges 205, and the two convex edges 205 are abutted to the inner wall of the central hole 101, so that the concentricity of the rotating shaft 200 and the spray arm seat 100 is improved, the contact area between the rotating shaft 200 and the spray arm seat 100 is reduced, and smooth rotation of the rotating shaft 200 is facilitated. The inner wall of the central hole 101 is further provided with a limiting ring 103, the lower end of the rotating shaft 200 abuts against the limiting ring 103, the rotating shaft 200 is supported by the limiting ring 103, and the limiting ring 103 and the central gear 510 are matched to clamp the rotating shaft 200, so that the axial positioning accuracy is improved.

Referring to fig. 10 and 11, in consideration of the fact that the central gear 510 and the dial gear 520 are installed on the rotating shaft 200 in assembly, and the installation seat 310 is installed at the upper end of the rotating shaft 200, in order that the rotating shaft 200 can smoothly pass through the central holes of the central gear 510 and the dial gear 520, the inner walls of the central holes of the central gear 510 and the dial gear 520 are respectively provided with an avoidance groove, the avoidance grooves are matched with the shape and the position of the latch 203, the latch 203 can pass through, and the latch 203 is prevented from interfering with the central gear 510 and the dial gear 520.

Referring to fig. 2, 3 and 12, it can be understood that the outer wall of the second shaft 320 is provided with two retainer rings 321, the diameter of each of the two retainer rings 321 is larger than the diameter of the central hole of the pinion gear 530, and the two retainer rings 321 cooperatively grip the pinion gear 530 to define the pinion gear 530 in the axial direction to prevent the pinion gear 530 from being separated from the second shaft 320. For convenience of installation, the lower end face of the second shaft 320 is provided with an elastic groove 322, the elastic groove 322 extends along the axial direction of the second shaft 320, the periphery of the baffle ring 321 positioned below is provided with a guide inclined surface, when the pinion 530 is installed, the central hole of the pinion 530 is aligned with the second shaft 320, and due to the existence of the elastic groove 322, the pinion 530 can push the second shaft 320 to contract by using the guide inclined surface, so that the baffle ring 321 below passes through the central hole of the pinion 530, the installation is completed, and the operation is convenient. After the installation, the second shaft 320 is automatically reset due to the elasticity, and the lower stop ring 321 blocks the pinion 530 to prevent the disengagement.

The embodiment of the second aspect of the utility model provides a dishwasher, contain the spray arm subassembly as the embodiment of the first aspect, the spray arm subassembly is including spray arm seat 100, pivot 200, main spray arm 300, vice spray arm 400 and transmission 500, spray arm seat 100 fixed mounting is on dishwasher, the inside of pivot 200 is equipped with along the axial arranges water delivery passageway 201, water delivery passageway 201 runs through to the both ends of pivot 200, main spray arm 300 has mount pad 310, mount pad 310 fixed connection is in the upper end of pivot 200.

It can be understood that the main spray arm 300 is internally formed with a first cavity 301, the auxiliary spray arm 400 is internally formed with a second cavity 401, the mounting seat 310 is provided with an inner cavity 312, the first cavity 301 and the second cavity 401 are communicated with the water delivery channel 201 through the inner cavity 312, the main spray arm 300 is formed with a plurality of first spray holes 302 communicated with the first cavity 301, the auxiliary spray arm 400 is formed with a plurality of second spray holes 402 communicated with the second cavity 401, and the washing water is input from the water delivery channel 201 of the rotating shaft 200, is branched to the first cavity 301 of the main spray arm 300 and the second cavity 401 of the auxiliary spray arm 400, and is sprayed from the first spray holes 302 and the second spray holes 402 to spray and wash dishes.

The spray arm assembly is connected with a transmission device 500, the transmission device 500 comprises a central gear 510, a turntable gear 520 and a pinion 530, the central gear 510 and the turntable gear 520 are sleeved on the middle part of the rotating shaft 200, the main spray arm 300 is provided with a second shaft 320 parallel to the rotating shaft 200, the second shaft 320 is positioned on the outer side of the rotating shaft 200, and the pinion 530 is sleeved on the second shaft 320. The central gear 510 is fixed, like the spray arm base 100, the turntable gear 520 is rotatable with respect to the rotation shaft 200, the pinion gear 530 is rotatable with respect to the second shaft 320, the central gear 510 and the turntable gear 520 are engaged with the pinion gear 530, and the central gear 510 has one more tooth than the turntable gear 520. It should be understood that, as shown in fig. 6, although the central gear 510 and the turntable gear 520 are different, the pitch of the central gear 510 and the turntable gear 520 are relatively close, and the meshing position between the central gear 510 and the turntable gear 520 and the pinion 530 is only 2 to 3 teeth, so that the central gear 510 and the turntable gear 520 can be meshed with the pinion 530 at the same time, and transmission is realized.

It can be understood that the main spray arm 300 drives the rotation shaft 200 to rotate, that is, the second shaft 320 also rotates around the rotation shaft 200, because the central gear 510 is fixed, the pinion 530 both revolves around the central gear 510 and rotates simultaneously, the transmission device 500 is designed according to the frictionson of the fragson gear transmission, the pinion 530 rotates around the central gear 510 by one circle, the numbers of teeth of the dial 520 and the central gear 510 matching with the pinion 530 are the same, because the central gear 510 has one more tooth than the dial 520, the dial 520 rotates by one more angle, that is, the dial 520 rotates slowly relative to the central gear 510, the pinion 530 rotates around the central gear 510 by one circle, the dial 520 rotates by one tooth, the rotational speeds of the dial 520 and the sub spray arm 400 are different, during the relative rotation, the dial 520 pushes the sub spray arm 400 to rotate around the mounting post 311 by a certain angle through the trigger 521, thereby realizing the water flow sprayed from the second spray holes 402 of the sub spray arm 400, and the swinging water flow from different angles, effectively improving the washing effect on the washing efficiency of the dish washer, and realizing the energy saving and the dish washer.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge scope of those skilled in the art.

Claims (15)

1. Spray arm subassembly, its characterized in that includes:

the spray arm seat is provided with a central hole;

the rotating shaft penetrates through the central hole;

the main spray arm is fixedly connected to the end part of the rotating shaft and is provided with a second shaft;

the auxiliary spray arm is rotatably connected with the main spray arm;

the transmission device comprises a central gear, a turntable gear and a pinion, wherein the central gear is sleeved in the middle of the rotating shaft, the pinion is sleeved in the second shaft, the central gear and the spray arm seat are relatively fixed, the turntable gear can rotate relative to the rotating shaft, the central gear and the turntable gear are both meshed with the pinion, the number of teeth of the central gear is different from that of teeth of the turntable gear by one, the turntable gear is provided with a trigger part, and the trigger part is used for pushing the auxiliary spray arm to rotate so as to change the water spraying direction.

2. The spray arm assembly of claim 1 wherein said trigger is a first projection disposed on said face of said turret gear, said first projection facing said secondary spray arm, said secondary spray arm being provided with a second projection that engages said first projection.

3. The spray arm assembly of claim 2 wherein said secondary spray arm axis of rotation is perpendicular to said spindle axis, said second projection being located on a side of said secondary spray arm.

4. The spray arm assembly of claim 2 or 3, wherein the turntable gear is provided with a plurality of the first protrusions, the plurality of the first protrusions being distributed along a circumferential direction of the turntable gear.

5. The spray arm assembly of any one of claims 2 to 4, wherein the outer periphery of the turntable gear is provided with an annular edge plate, and the first protrusion is provided on the annular edge plate.

6. The spray arm assembly of any one of claims 1 to 5 wherein the sun gear is provided with a plurality of struts surrounding the spray arm socket, the struts being provided with first catches and the spray arm socket being provided with second catches engaging the first catches.

7. The spray arm assembly of claim 6 wherein the outer wall of the spindle is provided with a support ring and the sun gear is provided with a recess that engages the support ring.

8. The spray arm assembly of claim 7 wherein the support ring has two end surfaces that abut the sun gear and the spray arm mount, respectively.

9. The spray arm assembly of any one of claims 6 to 8, wherein the turntable gear is provided with a convex ring facing the central gear, an end surface of the convex ring being a circular arc surface and abutting against the central gear.

10. The spray arm assembly of any one of claims 6 to 9, wherein the second catch is a third projection on the outer wall of the spray arm base, the sun gear being provided with a plurality of spaced apart locating plates, the third projection being captured between two adjacent locating plates.

11. The spray arm assembly of any one of claims 1 to 10, wherein the outer wall of the end of the rotating shaft is provided with a raised fixture block, and the main spray arm is provided with a clamping groove matched with the fixture block.

12. The spray arm assembly of claim 11, wherein the end of the shaft is provided with a neck portion that is recessed, the latch is located on an outer wall of the neck portion, and the main spray arm is provided with a receiving groove for receiving the neck portion.

13. The spray arm assembly of claim 11 or 12, wherein the central gear and the inner wall of the central hole of the turntable gear are provided with an avoiding groove for the fixture block to pass through.

14. The spray arm assembly of any one of claims 1 to 13 wherein the second shaft is provided with an axial resilient groove, the outer wall of the second shaft is provided with a stop ring, the diameter of the stop ring is greater than the diameter of the central bore of the pinion, and the outer periphery of the stop ring is provided with a guide ramp.

15. Dishwasher, characterized in that it comprises a spray arm assembly according to any of claims 1 to 14.

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