WO2024045356A1 - 喷臂以及洗碗机 - Google Patents

喷臂以及洗碗机 Download PDF

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Publication number
WO2024045356A1
WO2024045356A1 PCT/CN2022/132593 CN2022132593W WO2024045356A1 WO 2024045356 A1 WO2024045356 A1 WO 2024045356A1 CN 2022132593 W CN2022132593 W CN 2022132593W WO 2024045356 A1 WO2024045356 A1 WO 2024045356A1
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WO
WIPO (PCT)
Prior art keywords
spray arm
main
auxiliary
ring body
main spray
Prior art date
Application number
PCT/CN2022/132593
Other languages
English (en)
French (fr)
Inventor
张婧宜
杜光辉
李翔
熊好平
陈盈杰
黄瑶
叶明才
Original Assignee
芜湖美的智能厨电制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202222327989.XU external-priority patent/CN218356139U/zh
Priority claimed from CN202211057734.4A external-priority patent/CN117652987A/zh
Application filed by 芜湖美的智能厨电制造有限公司 filed Critical 芜湖美的智能厨电制造有限公司
Publication of WO2024045356A1 publication Critical patent/WO2024045356A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/14—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber
    • A47L15/18—Washing or rinsing machines for crockery or tableware with stationary crockery baskets and spraying devices within the cleaning chamber with movably-mounted spraying devices
    • A47L15/22—Rotary spraying devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details

Definitions

  • the present application relates to the technical field of dishwashers, and in particular to a spray arm and a dishwasher.
  • the spray arm includes a main spray arm and a auxiliary spray arm.
  • the auxiliary spray arm is rotatably connected to the main spray arm to receive water flow from the main spray arm. In this way, the washing effect is improved. .
  • the application aims to solve, at least to a certain extent, a technical problem in the relevant technology.
  • this application proposes a spray arm.
  • the auxiliary spray arm on the spray arm can minimize the impact on the rotation of the main spray arm to ensure the washing effect.
  • a spray arm which includes: a main spray arm, which is suitable for rotating around its rotation axis, and the torque of the main spray arm is Mc; and an auxiliary spray arm, which is rotatably provided on the Main spray arm, the rotation axis of the auxiliary spray arm and the rotation axis of the main spray arm are non-coaxial, the torque generated by the auxiliary spray arm on the main spray arm is Ms, and Mc/Ms>3/ 2.
  • Figure 1 is a schematic structural diagram of a spray arm in some embodiments
  • Figure 2 is a top view of a spray arm in some embodiments
  • Figure 3 is a cross-sectional view of A-A in Figure 2;
  • Figure 4 is an enlarged view shown by one of the dotted lines in Figure 3;
  • Figure 5 is an enlarged view shown by another dotted line in Figure 3;
  • Figure 6 is an exploded schematic diagram of the spray arm structure in some embodiments.
  • Figure 7 is an enlarged view shown by the dotted line in Figure 6;
  • Figure 8 is a schematic structural diagram of the first bearing/second bearing in some embodiments.
  • Figure 9 is an enlarged view shown by the dotted line in Figure 8.
  • Figure 10 is a schematic structural diagram of the mounting bracket in some embodiments.
  • Figure 11 is an exploded schematic diagram of the spray arm structure in some embodiments.
  • Main spray arm 100 cleaning nozzle 101, driving nozzle 102, main spray arm upper piece 110, water outlet 111, first mounting groove 112, second convex ring 113, third convex ring 114, first clamping hole 115, first Vertical groove 116, first guide groove 117, second accommodation cavity 118, main spray arm lower piece 120, water inlet pipe 121;
  • Spray arm base 300 mounting base 310, mounting frame 320, second mounting slot 321, slot wall 322 of the second mounting slot, second clamping hole 323, second vertical slot 324, second guide slot 325, claw 362 ;
  • connection can be a fixed connection, a detachable connection, or an integral body; it can It can be directly connected, or it can be indirectly connected through an intermediate medium. It can be the internal connection between two elements or the interaction between two elements.
  • a first feature being "on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. touch.
  • the spray arm is a structure that sprays water flow.
  • a dishwasher is taken as an example to illustrate the spray arm.
  • a dishwasher is a device that can automatically clean tableware.
  • a dishwasher includes a base, an inner tank, and a door.
  • the inner tank is installed on the base.
  • the inner tank is equipped with a washing chamber.
  • the door, inner tank, and/or Or the base can be rotated and connected to close or open the washing cavity.
  • the washing cavity is equipped with a bowl basket that can be pulled out or pushed in. When the door body opens the washing cavity, the bowl basket can be pulled out of the washing cavity. At this time, the bowl basket can be placed in the washing cavity.
  • Some larger dishwashers are divided into upper, middle and lower spray arms.
  • the spray arm is connected to the washing pump in the base through the waterway.
  • the washing pump is also connected to the washing chamber.
  • the spray arm is equipped with a nozzle.
  • the water flow is ejected from the nozzle of the spray arm under the action of pressure.
  • the reverse driving force of the water flow ejected from the nozzle of the spray arm is Under the action, the spray arm is prompted to rotate, so that the water flow is sprayed onto the tableware to clean the tableware.
  • the water sprayed by the spray arm falls back into the washing chamber.
  • the water is filtered by the filter and continues to circulate under the action of the washing pump until the washing is completed and the water is discharged by the drainage pump.
  • the entire spray arm rotates around the rotation axis.
  • the driving force generated by most of the nozzles on the arm body on one side of the rotation axis is in the same direction, driving the entire spray arm.
  • the spray arm is modified into a main spray arm and a secondary spray arm to improve the cleaning effect.
  • the impact of the rotation of the secondary spray arm on the main spray arm is ignored in the related technology, thereby affecting the cleaning effect. Therefore, this application proposes a new spray arm to solve the above problems.
  • the spray arm includes a main spray arm 100 and a secondary spray arm 200.
  • the main spray arm 100 passes through the spray arm base 300 Rotably installed on the inner tank, the spray arm base 300 is connected with the water outlet of the washing pump, so that the water extracted from the washing chamber by the washing pump can be transported to the main spray arm 100 through the spray arm base 300.
  • the main spray arm 100 is provided with a cleaning nozzle 101 and a driving nozzle 102.
  • the driving nozzle 102 of the main spray arm 100 is more inclined relative to the cleaning nozzle 101 of the main spray arm 100. The more inclined here is where the driving nozzle 102 of the main spray arm 100 is.
  • the component force of the generated jet water in the horizontal direction is larger than the component force of the jet water generated by the cleaning nozzle 101 of the main spray arm 100 in the horizontal direction.
  • the driving nozzle 102 of the main spray arm 100 is located at the outermost side of the main spray arm 100 and mainly plays the role of providing driving force.
  • the cleaning nozzle 101 of the main spray arm 100 is relatively located on the inner side and mainly plays the role of cleaning tableware. It can be understood that the driving nozzle 102 of the main spray arm 100 can also provide a certain cleaning ability, and the cleaning nozzle 101 of the main spray arm 100 can also provide a certain driving force in the horizontal direction.
  • the horizontal component of the jet water produced by a single nozzle on the main spray arm 100 is multiplied by the moment arm to form a torque.
  • the torques of all the nozzles add up to the total torque Mc.
  • the main spray arm 100 mainly rotates Rotation is achieved under the action of moment Mc (the driving force generated by the water sprayed by the main spray arm 100 is Fc).
  • the auxiliary spray arm 200 is rotatably disposed on the main spray arm 100.
  • the auxiliary spray arm 200 is located above, the main spray arm 100 is located below, and the auxiliary spray arm 200 is located above the main spray arm 100.
  • the end of the arm 100 makes the rotation axis of the auxiliary spray arm 200 and the rotation axis of the main spray arm 100 inconsistent. Except for a part of the water flow input to the main spray arm 100 that is ejected through the driving nozzle 102 and the cleaning nozzle 101 on the main spray arm 100, most of the water flow is input to the auxiliary spray through the rotating connection between the main spray arm 100 and the auxiliary spray arm 200.
  • the auxiliary spray arm 200 is provided with corresponding driving nozzles 202 and cleaning nozzles 201, which are similar to the driving nozzles 102 and cleaning nozzles 101 of the main spray arm 100.
  • the driving nozzles 202 of the auxiliary spray arm are opposite to the cleaning nozzles of the auxiliary spray arm.
  • 201 is more inclined, the driving nozzle 202 of the auxiliary spray arm mainly plays the role of improving the driving force, and the cleaning nozzle 201 of the auxiliary spray arm mainly plays the role of cleaning tableware.
  • the auxiliary spray arm 200 sprays water and can rotate freely on the main spray arm 100. Therefore, it can superimpose and rotate simultaneously with the rotation of the main spray arm 100. That is, in addition to being able to rotate around itself, the auxiliary spray arm 200 can also It can realize revolution around the rotation axis of the main spray arm 100 . In this way, the nozzles (cleaning nozzle 201 and driving nozzle 202) on the auxiliary spray arm 200 will form a non-fixed trajectory, thereby increasing the diversity of spray washing and enhancing the washing effect.
  • the horizontal component force of the spray water generated by the nozzle on the auxiliary spray arm 200 indirectly affects the main spray arm 100. This part of the horizontal component force multiplied by the force arm forms an opposition.
  • the torque Ms generated by the main spray arm 100 (the driving force generated by the water jetted by the auxiliary spray arm 200 is Fs) satisfies Mc/Ms>3/2.
  • the design can be carried out in the following ways, for example, calculating the spray angle of the driving nozzle 202 on the auxiliary spray arm 200, or adjusting the driving nozzle 202 and the auxiliary spray arm 200 on the auxiliary spray arm 200.
  • the distance between the rotation axes on the auxiliary spray arm 200 may also be calculated by calculating the number of nozzles on the auxiliary spray arm 200 .
  • the main spray arm 100 and the auxiliary spray arm 200 are designed to rotate non-coaxially, thereby increasing the movement trajectory of the nozzle of the auxiliary spray arm 200, thereby enhancing the washing effect.
  • the auxiliary spray arm 200 and the main spray arm are The spray arm 100 is designed to satisfy the torque condition Mc/Ms>3/2. This can minimize the impact of the rotation of the auxiliary spray arm 200 on the main spray arm 100, make the rotation of the main spray arm 100 more stable, and prevent the main spray arm 100 from locally swinging or slowing, so that The main spray arm 100 rotates at a nearly uniform speed as a whole, thereby avoiding under-washed areas on the tableware and ensuring the washing effect.
  • the momentum generated by the secondary spray arm 200 on the main spray arm 100 is M1
  • the momentum generated by the main spray arm itself is M2
  • the superimposed momentum of the momentum M1 and M2 is superimposed on the main spray arm momentum M3, then M3min/M3max>25%, where M3min is the minimum value of the main spray arm superimposed momentum M3; M3max is the maximum value of the main spray arm superimposed momentum M3. Controlling the maximum superimposed momentum within 4 times of the minimum superimposed momentum can effectively reduce The influence of the auxiliary spray arm on the main spray arm speed.
  • the rotation direction of the auxiliary spray arm 200 is opposite to the rotation direction of the main spray arm 100 .
  • the main spray arm 100 rotates in a clockwise direction
  • the auxiliary spray arm 200 rotates in a counterclockwise direction.
  • the opposite rotation directions of the auxiliary spray arm 200 and the main spray arm 100 can be realized by the design of respective driving nozzles, or by the design of respective driving nozzles and cleaning nozzles. Since the rotation directions of the auxiliary spray arm 200 and the main spray arm 100 are different, the sprayed water flows onto the tableware at different angles, which further improves the washing effect of the tableware.
  • the auxiliary spray arm 200 can spray onto the front surface of the tableware, and the water jet can well cover the front surface of the tableware, but the water flow sprayed by the auxiliary spray arm 200 is difficult to cover the back surface of the tableware.
  • the rotation direction of the main spray arm 100 is opposite, the water flow sprayed by the main spray arm 100 can clean the back surface of the tableware very well.
  • the combination of the main spray arm 100 and the auxiliary spray arm 200 can effectively clean the tableware.
  • the main spray arm 100 and the auxiliary spray arm 200 need to satisfy Mc/Ms>3/2, the effect of Ms and Mc on the rotation of the main spray arm 100 will be minimal and will not affect the rotation of the main spray arm 100. Turning has too much negative impact.
  • the rotation speed of the auxiliary spray arm 200 is designed to be greater than the rotation speed of the main spray arm 100 .
  • the rotation speed of the auxiliary spray arm 200 can be controlled within a certain range, and the same is true for the rotation speed of the main spray arm 100 .
  • the rotation speed of the main spray arm 100 is defined as n2
  • the rotation speed of the auxiliary spray arm 200 is defined as n1, satisfying n1/n2>1 and n1/n2 ⁇ 1.5, or satisfying n1/n2>2.
  • the rotation speed of the auxiliary spray arm 200 is designed to be at least
  • the rotational speed of the main spray arm 100 is twice that of the main spray arm 100, so as to avoid washing dead spots, and the number of nozzles on the auxiliary spray arm 200 can be as small as possible to ensure the pressure of the spray water.
  • the sub-spray arm 200 needs to be equipped with two nozzles for rotation and cleaning, namely the cleaning nozzle 201 and the driving nozzle 202.
  • the angles of the cleaning nozzle 201 and the driving nozzle 202 of the sub-spray arm are inconsistent. .
  • only the cleaning nozzle 201 can be provided.
  • the cleaning nozzle 201 is slightly set at a certain angle and can also play a driving role.
  • the auxiliary spray arm 200 is provided with a driving nozzle 202 .
  • the driving nozzle 202 of the auxiliary spray arm mainly plays a role in driving the rotation of the auxiliary spray arm 200 .
  • the driving nozzle 202 of the auxiliary spray arm 202 is located in the length direction of the auxiliary spray arm 200 .
  • symmetrically distributed for example, one end of the auxiliary spray arm 200 is provided with a driving nozzle 202, and the other end of the auxiliary spray arm 200 is provided with a driving nozzle 202.
  • the distance between the two driving nozzles 202 and the rotation axis of the auxiliary spray arm 200 can be the same. It is understood that the directions of the two driving nozzles 202 are different, so that the rotation of the auxiliary spray arm 200 is achieved.
  • the main spray arm 100 is provided with driving nozzles 102.
  • the driving nozzles 102 can be symmetrically distributed on the main spray arm 100, or can be provided only on one side.
  • the main spray arm 100 is provided with a driving nozzle 102 .
  • the driving nozzle 102 of the main spray arm 100 is only located on one side of the main spray arm 100 , and there is no driving nozzle on the other side of the main spray arm 100 .
  • the main spray arm 100 is divided into a first arm body and a second arm body, which are divided by the rotation axis of the main spray arm 100.
  • the part of the main spray arm 100 located on one side of the rotation axis is the first arm body, and the main spray arm 100 is located on The part on the other side of the rotation axis is the second arm body, and the driving nozzle 102 of the main spray arm 100 is arranged on the first arm body.
  • the driving nozzle 102 and the auxiliary spray arm 200 of the main spray arm 100 are arranged in the first arm body and the second arm body respectively, the water flow sprayed by the driving nozzle 102 of the main spray arm 100 will not be blocked by the auxiliary spray arm 200, thereby The design of the nozzles on the main spray arm 100 is simplified.
  • the driving nozzle 102 is only provided on one side of the main spray arm 100, which can effectively avoid the loss of water pressure on the premise of ensuring the normal rotation of the main spray arm 100.
  • the main spray arm 100 is also provided with a cleaning nozzle 101 , and the cleaning nozzle 101 of the main spray arm 100 is only provided on the first arm body.
  • the nozzles (cleaning nozzle 101 and driving nozzle 102) on the main spray arm 100 are only provided on the first arm body.
  • the water flow sprayed by the main spray arm 100 will not be blocked, avoiding the need to set the cleaning nozzle 101 on the second arm body of the main spray arm 100 and the need to consider the problem that the spray water flow is blocked by the auxiliary spray arm 200, thereby ensuring Reduce water flow pressure and avoid water pressure loss.
  • the auxiliary spray arm 200 is provided with a cleaning nozzle 201 .
  • the rotation range of the cleaning nozzle 201 of the outermost auxiliary spray arm is outside the body of the first arm. In this way, when the auxiliary spray arm 200 rotates, Ms can be minimized, thereby reducing the impact on the rotation of the main spray arm 100 and making the rotation of the main spray arm 100 more stable.
  • connection between the auxiliary spray arm 200 and the main spray arm 100 adopts a snap-turn connection method. This method is easy to cause leakage.
  • Water leakage and other phenomena as shown in Fig. 4 to Fig.
  • the auxiliary spray arm 200 and the main spray arm 100 are connected through a first bearing 400.
  • the first bearing 400 includes a first outer ring body 420 and a first inner ring body 410 that are nested with each other.
  • the first outer ring body 420 is arranged around the first inner ring body 410, and a first ball 440 is arranged between the first outer ring body 420 and the first inner ring body 410.
  • the first ball 440 can be multiple to form a ball group, so that it can be realized
  • the rolling connection between the first outer ring body 420 and the first inner ring body 410 means that the first outer ring body 420 and the first inner ring body 410 can rotate relative to each other, so that the first inner ring body 410 is connected.
  • the first inner ring body 410 and the auxiliary spray arm 200 are fixedly connected and cannot rotate relative to each other.
  • the first outer ring body 420 and the main spray arm 100 are fixedly connected and cannot rotate relative to each other.
  • the friction between the auxiliary spray arm 200 and the main spray arm 100 is in the form of rolling friction, so that , rolling friction produces less resistance to the rotation of the auxiliary spray arm 200, so the problem of hydraulic loss caused by friction can be reduced.
  • the auxiliary spray arm 200 is provided with a water inlet 221 on one side close to the main spray arm 100 , and the auxiliary spray arm 200 is also provided with a first convex ring 222 surrounding the water inlet 221
  • the main spray arm 100 is provided with a water outlet 111 on one side close to the auxiliary spray arm 200.
  • the main spray arm 100 is also provided with a second convex ring 113 surrounding the water outlet 111 and a third convex ring 114 surrounding the second convex ring 113.
  • a first mounting groove 112 for mounting the first bearing 400 is formed between the second convex ring 113 and the third convex ring 114 .
  • the first convex ring 222 of the auxiliary spray arm 200 is sleeved outside the second convex ring 113 of the main spray arm 100, and there is a clearance fit between the first convex ring 222 and the second convex ring 113, so that the rotation of the auxiliary spray arm 200 is not limited.
  • the first bearing 400 is installed into the first installation groove 112, in which the first outer ring body 420 and the third convex ring 114 of the first bearing 400 are fixed, and the first inner ring body 410 of the first bearing 400 is fixed.
  • the auxiliary spray arm 200 drives the first inner ring body 410 to rotate relative to the first outer ring body 420, thereby effectively reducing frictional resistance.
  • the third convex ring 114 is provided with a first latching hole 115
  • the first outer ring body 420 of the first bearing 400 is provided with a first latching protrusion 421 , so that the first bearing 400 is installed in the first installation groove.
  • the first latching protrusion 421 on the first outer ring body 420 is embedded in the fixed first latching hole 115 and cannot move, thus achieving effective fixation.
  • the number of the first latching protrusions 421 may be multiple.
  • the first latching holes 115 and the first latching protrusions 421 correspond one to one.
  • the plurality of first latching protrusions 421 are arranged at intervals along the circumferential direction of the first outer ring body 420.
  • the first clamping holes 115 are arranged at intervals along the circumferential direction of the third convex ring 114, which greatly improves the fixing effect.
  • the first latching protrusion 421 is provided with an inclined surface 422 to guide the first latching protrusion 421 to slide into the first latching hole 115 when the first bearing 400 is installed in the first mounting groove 112 .
  • the first bearing 400 in the direction shown in FIG. 1 , in the direction perpendicular to the axial direction of the first bearing 400 , at least part of the cross-sectional area of the first protrusion 421 gradually increases from bottom to top, thus forming a slope 422 , which can be used during installation.
  • the first bearing 400 is installed, the first bearing 400 is installed into the first installation groove 112 from top to bottom.
  • the slope 422 of the first latch 421 first touches the third flange 114, so that the first bearing 400 is Continuing to press down directly inserts the first latching protrusion 421 into the first latching hole 115 and prevents the first latching protrusion 421 from escaping from the first latching hole 115 in the opposite direction, effectively ensuring the fixation of the first bearing 400 and the first mounting groove 112 .
  • first vertical grooves 116 are provided at intervals along the circumferential direction of the third flange ring 114, and the first vertical grooves 116 extend along the axial direction of the third flange ring 114, correspondingly , the first outer ring body 420 of the first bearing 400 is provided with a first insertion rib 423 corresponding to the first vertical groove 116.
  • the cooperation between the first vertical groove 116 and the first insertion rib 423 realizes the installation of the first bearing 400. Preliminary positioning eliminates the need to adjust the position during installation of the first bearing 400, thereby improving assembly and efficiency.
  • a first guide groove 117 is provided at the bottom of the first installation groove 112, and the first guide groove 117 is connected with the first vertical groove 116. Since the spray arm is in a water environment when working, water infiltration inevitably occurs in the first installation groove 112. By setting the first guide groove 117 at the bottom of the first installation groove 112, water infiltration into the first installation groove 112 can be prevented. The water flows through the first guide groove 117 and then is discharged from the first installation groove 112 through the first vertical groove 116 .
  • the first bearing 400 also includes a first cage 430 , which is fixed to the first inner ring body 410 and the first outer ring body 420 In between, the first cage 430 is provided with a fixed part, and the first ball 440 is fixed on the fixed part of the first cage 430, so that the position of the entire ball group is relatively fixed, preventing adjacent balls from occurring. Smooth rotation caused by contact and squeezing ensures the rotation effect of the auxiliary spray arm 200.
  • the auxiliary spray arm 200 includes an upper auxiliary spray arm piece 210 and a lower auxiliary spray arm piece 220 .
  • the edge of the lower auxiliary spray arm piece 220 is opposite to the edge of the upper auxiliary spray arm piece 210 .
  • the two pass through The connection is achieved by welding, and a first accommodation cavity 223 is formed between the auxiliary spray arm lower piece 220 and the auxiliary spray arm upper piece 210.
  • the auxiliary spray arm lower piece 220 is provided with a water inlet 221, and the water inlet 221 and the first accommodation cavity 223 connected, the water flows out from the main spray arm 100 and flows into the first accommodation chamber 223 of the auxiliary spray arm 200 through the water inlet 221.
  • the nozzles of the upper spray arm piece 210 flow out, thereby reducing the manufacturing difficulty of the auxiliary spray arm 200 .
  • the main spray arm 100 includes a main spray arm upper piece 110 and a main spray arm lower piece 120.
  • the edge of the main spray arm lower piece 120 is opposite to the edge of the main spray arm upper piece 110.
  • the two are connected by welding.
  • a second accommodation cavity 118 is formed between the upper piece 120 of the main spray arm and the upper piece 110 of the main spray arm.
  • the upper piece 110 of the main spray arm is provided with a water outlet 111.
  • the outlet 111 is connected to the second accommodation cavity 118, and the water flow flows from the upper piece of the main spray arm 100.
  • the water flows out from the water outlet 111 and flows into the first receiving cavity 223 of the secondary spray arm 200 through the water outlet 111 and the water inlet 221 of the secondary spray arm 200 .
  • the main spray arm upper piece 110 is provided with a second convex ring 113 and a third convex ring 114 .
  • connection method between the main spray arm 100 and the spray arm base 300 can also be the connection method between the main spray arm 100 and the auxiliary spray arm 200, which can reduce the frictional resistance between the main spray arm 100 and the spray arm base 300.
  • the spray arm needs to be installed to the inner tank.
  • the spray arm is installed at the bottom of the inner tank, that is, the bottom of the inner tank is provided with a spray arm base 300.
  • the spray arm base 300 includes a mounting base 310 and a mounting frame 320.
  • the mounting frame 320 and the mounting base 310 are detachably connected, and the mounting base 310 is fixed in the inner tank.
  • the mounting bracket 320 is provided with a claw 362.
  • the mounting bracket 320 is detachably connected to the mounting base 310 through the claw 362.
  • the claw 362 extends along the axial direction of the mounting base 310.
  • the main spray arm 100 passes through the second bearing. 500 is connected to the mounting bracket 320.
  • the mounting base 310 is disposed at the bottom of the inner tank. Since the mounting bracket 320 and the mounting base 310 are detachably connected, the mounting bracket 320 can be connected to the main spray arm 100 through the second bearing 500 outside the inner tank. This In this case, there is no obstruction by the inner tank, which makes the connection between the main spray arm 100 and the mounting bracket 320 more convenient. After the mounting bracket 320 and the main spray arm 100 are connected through the second bearing 500, the whole body is connected to the mounting seat 310 through the mounting bracket 320, thereby realizing quick installation.
  • the second bearing 500 includes a second outer ring body 520 and a second inner ring body 510 that are nested with each other.
  • the second outer ring body 520 is arranged around the second inner ring body 510
  • the second outer ring body 520 is arranged around the second inner ring body 510 .
  • a second ball 540 is provided between the second outer ring body 520 and the second inner ring body 510.
  • Rolling connection that is, the second outer ring body 520 and the second inner ring body 510 can rotate relative to each other, so that the second inner ring body 510 is connected to the main spray arm 100, and the second outer ring body is connected to the mounting bracket.
  • the main spray arm 100 is connected to the mounting bracket 320 through the second bearing 500 , and then can be connected to the mounting base 310 through the mounting bracket 320 .
  • the second inner ring body 510 and the main spray arm 100 are fixedly connected and cannot rotate relative to each other.
  • the second outer ring body 520 and the mounting bracket 320 are fixedly connected and the two cannot rotate relative to each other.
  • the main spray arm 100 faces the spray arm base 300 with a water inlet pipe 121.
  • the water inlet pipe 121 forms a water inlet.
  • the central axis of the water inlet pipe 121 and the rotation axis of the main spray arm 100 are coaxially designed.
  • the main spray arm 100 passes through the water inlet pipe 121.
  • a mounting bracket 320 is provided.
  • the mounting bracket 320 is provided with a second mounting groove 321 surrounding the water inlet pipe 121 .
  • the second mounting groove 321 is used to install the second bearing 500 .
  • the water inlet pipe 121 of the main spray arm 100 passes through the mounting bracket 320 and is embedded in the mounting seat 310 and communicates with the mounting seat 310 .
  • the second bearing 500 is installed in the second mounting groove 321 , wherein the second bearing 500 is installed in the second mounting groove 321 .
  • the second outer ring body 520 of the second bearing 500 is connected to the groove wall 322 of the second installation groove, and the second inner ring body 510 of the second bearing 500 is fixed on the water inlet pipe 121, so that when the main spray arm 100 rotates, the main spray arm 100 drives the second inner ring body 510 to rotate relative to the second outer ring body 520, thereby reducing frictional resistance.
  • the groove wall 322 of the second installation groove is provided with a second locking hole 323
  • the second outer ring body 520 of the second bearing 500 is provided with a second locking protrusion 521 , so that when the second bearing 500 is installed on the second When the second mounting groove 321 is installed, the second latching protrusion 521 on the second outer ring body 520 is embedded and fixed in the second latching hole 323 and cannot move, thus achieving effective fixation.
  • the second latching holes 323 correspond to the second latching protrusions 521 one-to-one.
  • the plurality of second latching protrusions 521 are arranged at intervals along the circumferential direction of the second outer ring body 520 .
  • the second clamping holes 323 are arranged at intervals along the circumferential direction of the groove wall 322 of the second mounting groove, which greatly improves the fixing effect.
  • the second latching protrusion 521 is provided with an inclined surface 522 to guide the second latching protrusion 521 to slide into the second latching hole 323 when the second bearing 500 is installed in the second installation groove 321 .
  • the cross-sectional area of at least part of the second latch 521 gradually increases from bottom to top, thus forming the slope 522 .
  • the second bearing 500 Continuing to press down under the force directly inserts the second latching protrusion 521 into the second latching hole 323, and prevents the second latching protrusion 521 from escaping from the second latching hole 323 in the opposite direction, effectively ensuring that the second bearing 500 and the second latching hole 323 are securely connected. Fixing of mounting slot 321.
  • the groove wall 322 of the second installation groove is provided with second vertical grooves 324 at intervals.
  • the second vertical grooves 324 are along the second installation groove 321. The axial extension of The preliminary positioning of the second bearing 500 during installation is achieved, and there is no need to adjust the position during installation of the second bearing 500, thereby improving assembly and efficiency.
  • a second guide groove 325 is provided at the bottom of the second installation groove 321, and the second guide groove 325 is connected with the second vertical groove 324. Since the spray arm is in a water environment when working, water infiltration inevitably occurs in the second installation groove 321. By setting the second guide groove 325 at the bottom of the second installation groove 321, water infiltration into the second installation groove 321 can be prevented. The water flows through the second guide groove 325 and then is discharged from the second installation groove 321 through the second vertical groove 324 .
  • the second bearing 500 also includes a second cage 530 , and the second cage 530 is fixed to the second inner ring body 510 and the second outer ring body 520 In between, the second cage 530 is provided with a fixed portion, and the second ball 540 is fixed on the fixed portion of the third cage, so that the position of the entire ball group is relatively fixed to avoid contact between adjacent balls.
  • the rotation effect of the main spray arm 100 is guaranteed to prevent smooth rotation caused by collision and squeezing.
  • the main spray arm 100 includes an upper main spray arm piece 110 and a lower main spray arm piece 120 .
  • the edge of the lower main spray arm piece 120 is opposite to the edge of the upper main spray arm piece 110 .
  • the two pass through The connection is achieved by welding, and a second accommodation cavity 118 is formed between the main spray arm lower piece 120 and the main spray arm upper piece 110.
  • the main spray arm lower piece 120 is provided with a water inlet pipe 121, and the water inlet pipe 121 and the second accommodation cavity 118 connected, the water flow is input from the washing pump to the second accommodation chamber 118 through the water inlet pipe 121, the main spray arm upper piece 110 is provided with nozzles (cleaning nozzles and driving nozzles), the water flow flows out from the nozzles of the main spray arm upper piece 110, thus reducing the main spray arm upper piece 110.
  • the difficulty of manufacturing the spray arm 100 is provided with a water inlet pipe 121, and the water inlet pipe 121 and the second accommodation cavity 118 connected, the water flow is input from the washing pump to the second accommodation chamber 118 through the water inlet pipe 121, the main spray arm upper piece 110 is provided with nozzles (cleaning nozzles and driving nozzles), the water flow flows out from the nozzles of the main spray arm upper piece 110, thus reducing the main spray arm upper piece 110.
  • the difficulty of manufacturing the spray arm 100 is provided with a water inlet pipe

Landscapes

  • Washing And Drying Of Tableware (AREA)

Abstract

一种喷臂和包含喷臂的洗碗机，喷臂包括主喷臂(100)和副喷臂(200)，主喷臂(100)绕其自身的转动轴线转动，主喷臂(100)的转矩为Mc，副喷臂(200)可转动设于主喷臂(100)，副喷臂(200)的转动轴线与主喷臂(100)的转动轴线非共轴设计，副喷臂(200)对主喷臂(100)产生的转矩为Ms，满足Mc/Ms>3/2。

Description

喷臂以及洗碗机
相关申请的交叉引用
本申请要求于2022年08月31日提交中国专利局、申请号为CN202211057734.4、申请名称为“喷臂以及洗碗机”以及2022年08月31日提交中国专利局、申请号为CN202222327989.X、申请名称为“喷臂以及洗碗机”的中国专利申请的优先权，其全部内容以引用形式并入本文。
技术领域
本申请涉及洗碗机技术领域，特别涉及一种喷臂以及洗碗机。
背景技术
一些洗碗机中，喷臂包含了主喷臂和副喷臂，副喷臂通过可转动的方式连接到主喷臂上，以接收来自主喷臂的水流，欲通过这种方式提高洗涤效果。
申请内容
申请旨在至少在一定程度上解决相关技术中的技术问题。为此本申请提出一种喷臂，喷臂上的副喷臂能最大限度地降低对主喷臂旋转的影响，以确保洗涤效果。
为实现上述目的，本申请公开了一种喷臂，包括：主喷臂，适于绕其转动轴线转动，所述主喷臂的转矩为Mc；以及副喷臂，可转动设于所述主喷臂，所述副喷臂的转动轴线与所述主喷臂的转动轴线非共轴，所述副喷臂对所述主喷臂产生的转矩为Ms，满足Mc/Ms＞3/2。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为一些实施例中喷臂结构示意图；
图2为一些实施例中喷臂俯视图；
图3为图2中A-A剖视图；
图4为图3中其中一个虚线所示放大图；
图5为图3中另一虚线所示放大图；
图6为一些实施例中喷臂结构分解示意图；
图7为图6中虚线所示放大图；
图8为一些实施例中第一轴承/第二轴承结构示意图；
图9为图8虚线所示放大图；
图10为一些实施例中安装架结构示意图；
图11为一些实施例中喷臂结构分解示意图。
附图标记：
主喷臂100，清洗喷嘴101，驱动喷嘴102，主喷臂上片110，出水口111，第一安装槽112，第二凸环113，第三凸环114，第一卡孔115，第一竖槽116，第一导流槽117，第二容纳腔118，主喷臂下片120，进水管121；
副喷臂200，清洗喷嘴201，驱动喷嘴202，副喷臂上片210，副喷臂下片220，进水口221，第一凸环222，第一容纳腔223；
喷臂座300，安装座310，安装架320，第二安装槽321，第二安装槽的槽壁322，第二卡孔323，第二竖槽324，第二导流槽325，卡爪362；
第一轴承400，第一内环体410，第一外环体420，第一卡凸421，斜面422，第一插筋423，第一保持架430，第一滚珠440；
第二轴承500，第二内环体510，第二外环体520，第二卡凸521，斜面522，第二插筋523，第二保持架530，第二滚珠540。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
在本申请中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。
另外，在本申请中如涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的 含义是两个以上，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。
喷臂是一种将水流喷出的结构，本申请中以洗碗机为例对喷臂进行说明。
洗碗机是一种可以进行自动清洗餐具的设备，一般来说洗碗机包括底座、内胆、门体，内胆安装在底座上，内胆设有洗涤腔，门体与内胆和/或底座可转动连接，以封闭或打开洗涤腔，洗涤腔内设置有可拉出或推入的碗篮，在门体打开洗涤腔时，碗篮可被拉出洗涤腔，此时可在碗篮上装置餐具，装载完毕后将碗篮推入洗涤腔，然后使用门体封闭洗涤腔，洗涤腔内即可进行洗涤工作。洗涤腔内设置有喷臂，一些较大的洗碗机分为上中下喷臂，喷臂通过水路和底座内的洗涤泵连通，洗涤泵还与洗涤腔连通，在洗涤泵工作时，将洗涤腔内的水进行抽吸并输送到喷臂，喷臂上设置有喷嘴，水流在压力的作用下从喷臂的喷嘴中射出，在喷臂的喷嘴中射出的水流的反向驱动力的作用下，促使喷臂旋转，如此将水流喷射到餐具上以对餐具进行清洗。喷臂喷出的水流落回到洗涤腔，水流经过过滤网的过滤而继续在洗涤泵的作用下进行循环，直至洗涤结束，水被排水泵排放。
一般来说，喷臂整体绕着转动轴线进行转动，为了使得喷臂持续稳定地旋转，转动轴线一侧的臂体上的大部分的喷嘴所产生的驱动力是同向的，驱动整个喷臂做顺时针方向或者逆时针方向旋转，由于喷臂喷射的水流的方向大致是相同，因此覆盖性能有限。因此在相关技术中，通过将喷臂改造呈主喷臂加副喷臂的形式，以提高清洗效果，但是相关技术中忽略了副喷臂转动对主喷臂产生的影响，从而影响洗涤效果。因此本申请提出一种新的喷臂，以解决上述问题。
具体参见图1、图2、图3、图6和图11所示，在本申请的一些实施例中，喷臂包括主喷臂100和副喷臂200，主喷臂100通过喷臂座300可转动地安装到内胆上，喷臂座300与洗涤泵的出水口连通，这样洗涤泵抽取洗涤腔中的水便可通过喷臂座300输送至主喷臂100中。主喷臂100中设置有清洗喷嘴101和驱动喷嘴102，主喷臂100的驱动喷嘴102相对于主喷臂100的清洗喷嘴101更加倾斜，这里的更加倾斜即主喷臂100的驱动喷嘴102所产生的喷射水流在水平方向上的分力相对于主喷臂100的清洗喷嘴101所产生的喷射水流在水平方向上的分力要大。主喷臂100的驱动喷嘴102位于主喷臂100的最外侧，主要起到提供驱动力的作用，主喷臂100的清洗喷嘴101相对来说位于内侧，主要起到清洗餐具的作用。可以理解的是，主喷臂100的驱动喷嘴102也是可以提供一定的清洁能力的，而主喷臂100的清洗喷嘴101同样能在水平方向上提供一定的驱动力。
主喷臂100上的单个喷嘴所产生的喷射水流在水平方向上的分力乘以力臂即形成转矩，全部喷嘴的转矩累加起来为总的转矩Mc，主喷臂100主要在转矩Mc的作用下实现转动(主 喷臂100喷射水流产生的驱动力为Fc)。
副喷臂200可转动地设置在主喷臂100上，例如沿着副喷臂200的转动轴线的方向，副喷臂200位于上方，主喷臂100位于下方，且副喷臂200位于主喷臂100的末端，使得副喷臂200的转动轴线和主喷臂100的转动轴线不一致。输入到主喷臂100上的水流除了一部分通过主喷臂100上的驱动喷嘴102和清洗喷嘴101射出外，大部分的水流通过主喷臂100和副喷臂200的转动连接处输入到副喷臂200上，副喷臂200上设置有相应的驱动喷嘴202和清洗喷嘴201，和主喷臂100的驱动喷嘴102和清洗喷嘴101类似，副喷臂的驱动喷嘴202相对副喷臂的清洗喷嘴201更加倾斜，副喷臂的驱动喷嘴202主要起到提高驱动力的作用，副喷臂的清洗喷嘴201主要起到清洗餐具的作用。
副喷臂200喷射出水流，从而能够在主喷臂100上自由旋转，因此能随着主喷臂100的旋转而同时叠加旋转，也即副喷臂200除了能实现绕其自身自传外，还能绕主喷臂100的转动轴线实现公转。如此，副喷臂200上的喷嘴(清洗喷嘴201和驱动喷嘴202)将形成非固定的轨迹，从而增加了喷洗的多样性，加强了洗涤效果。
副喷臂200转动时，副喷臂200上的喷嘴所产生的喷射水在水平方向上的分力间接对主喷臂100产生作用，这部分水平方向上的分力乘以力臂即形成对主喷臂100产生的转矩Ms(副喷臂200喷射水流产生的驱动力为Fs)，满足Mc/Ms＞3/2。为了满足Mc/Ms＞3/2，可以通过如下方式进行设计，例如对副喷臂200上的驱动喷嘴202的喷射角度进行计算，或者对副喷臂200上的驱动喷嘴202和副喷臂200上的转动轴线的距离进行计算，还可以是通过对副喷臂200上的喷嘴的数量等进行计算等。
本申请通过将主喷臂100和副喷臂200设计为非共轴旋转，从而可以增加副喷臂200的喷嘴的运动轨迹，从而加强洗涤效果，在此基础上，将副喷臂200和主喷臂100设计成满足转矩条件Mc/Ms＞3/2。如此能最大限度地降低副喷臂200的转动对主喷臂100的影响，使得主喷臂100的转动更加平稳，防止主喷臂100出现局部摆动的现象，或出现局部缓转的现象，使得主喷臂100整体上接近于匀速转动，从而避免在餐具上出现欠洗涤区，确保洗涤效果。
在本申请的一些实施例中，副喷臂200对主喷臂100产生的动量为M1，主喷臂自身产生的动量为M2，动量M1与M2的叠加动量为主喷臂叠加动量M3，则M3min/M3max>25％，其中，M3min为主喷臂叠加动量M3的最小值；M3max为主喷臂叠加动量M3的最大值，将最大叠加动量控制在最小叠加动量的4倍以内，可以有效降低副喷臂对主喷臂转速的影响。
进一步地，副喷臂200的转动方向和主喷臂100的转动方向相反。例如主喷臂100以顺时针的方向转动，副喷臂200以逆时针的方向转动。副喷臂200和主喷臂100的转动方向相反可通过各自的驱动喷嘴的设计来实现，或者通过各自的驱动喷嘴以及清洗喷嘴的设 计来实现。由于副喷臂200和主喷臂100的转动方向不同，因此喷射的水流冲刷到餐具上也有不同的角度，这进一步地提高了餐具的洗涤效果。例如，在副喷臂200的水流喷射方向上，能喷射到餐具的迎水面，喷射水流能很好地覆盖餐具的迎水面，但副喷臂200喷射的水流则好难覆盖餐具的背水面，但由于主喷臂100的旋转方向相反，如此主喷臂100喷射的水流则很好的清洗餐具的背水面，通过主喷臂100和副喷臂200的结合实现对餐具的有效清洁。并且，由于主喷臂100和副喷臂200需要满足Mc/Ms＞3/2，Ms和Mc叠加抵消后对主喷臂100的转动产生影响也是极小的，不会对主喷臂100的转动产生太大负面影响。
进一步地，为了提高喷射水流的覆盖均匀性，副喷臂200的转速设计成大于主喷臂100的转速。例如对副喷臂200上的驱动喷嘴202进行设计(角度、位置、大小等)即可在一定的范围内控制副喷臂200的转速，对于主喷臂100的转速也是如此。进一步地将主喷臂100的转速定义为n2，副喷臂200的转速定义为n1，满足n1/n2＞1且n1/n2≠1.5，或满足n1/n2＞2。由于副喷臂200自由转动地设置在主喷臂100上，在副喷臂200的转动对主喷臂100的转动产生的影响很小的情况下，将副喷臂200的转速设计为至少为主喷臂100的转速的两倍，如此能避免存在洗涤死角，并且副喷臂200上的喷嘴数量可以尽可能的少，从而保证喷射水流射出的压力。
如上所述，一般来说，副喷臂200需要为了转动和清洗需要设置两种喷嘴，分别为清洗喷嘴201和驱动喷嘴202，副喷臂的清洗喷嘴201和驱动喷嘴202一般来说角度是不一致。但是在一些情况下，也可以只设置清洗喷嘴201，这样清洗喷嘴201略微呈现一定的角度设置，也能起到驱动的作用。结合图1所示，副喷臂200设置有驱动喷嘴202，副喷臂的驱动喷嘴202主要起到驱动副喷臂200旋转的作用，副喷臂的驱动喷嘴202在副喷臂200的长度方向上对称分布，例如副喷臂200的一端设置有一个驱动喷嘴202，副喷臂200的另一端设置有一个驱动喷嘴202，两个驱动喷嘴202和副喷臂200的转动轴线的距离一样，可以理解的是两个驱动喷嘴202的朝向是不一样的，如此实现副喷臂200的转动。通过将副喷臂200上的驱动喷嘴202设计为对称分布，如此使得副喷臂200的旋转更为平稳，最大限度降低对主喷臂100转动的影响，确保主喷臂100的均匀转动。
为了实现主喷臂100的转动，主喷臂100上设置有驱动喷嘴102，驱动喷嘴102可以在主喷臂100上呈对称分布，也可以仅设于一侧。参见图1所示，主喷臂100设置有驱动喷嘴102，主喷臂100的驱动喷嘴102仅位于主喷臂100的其中一侧，主喷臂100的另一侧不设置驱动喷嘴。具体为主喷臂100分为第一臂体和第二臂体，以主喷臂100的转动轴线划分，主喷臂100位于转动轴线一侧的部分是第一臂体，主喷臂100位于转动轴线另一侧的部分是第二臂体，主喷臂100的驱动喷嘴102设置在第一臂体。通过将主喷臂100的驱动喷嘴102和副喷臂200分设于第一臂体和第二臂体，由主喷臂100的驱动喷嘴102喷射 的水流不会受到副喷臂200的阻挡，从而简化了主喷臂100上的喷嘴的设计。而且仅在主喷臂100的一侧设置驱动喷嘴102，在保证主喷臂100正常转动的前提下，能有效避免水压的损失。
进一步的，继续参见图1所示，主喷臂100除了设置驱动喷嘴102外，还设置清洗喷嘴101，主喷臂100的清洗喷嘴101也仅仅设置在第一臂体。例如，副喷臂200上的喷嘴所喷射的水流不会受到阻挡，承担着更多的清洗任务，主喷臂100上的喷嘴(清洗喷嘴101、驱动喷嘴102)由于仅设置在第一臂体，因此主喷臂100所喷射的水流也不会受到阻挡，避免需要在主喷臂100的第二臂体上设置清洗喷嘴101而需要考虑到喷射水流受副喷臂200阻挡的问题，从而保证了水流压力，避免水压的损失。
参见图1所示，副喷臂200设有清洗喷嘴201，沿副喷臂200的长度方向，位于最外侧的副喷臂的清洗喷嘴201的转动范围在第一臂体外。这样，在副喷臂200转动时，能最大限度地减小Ms，从而减小对主喷臂100转动的影响，使得主喷臂100的转动更加平稳。
进一步地，相关技术中，副喷臂200和主喷臂100的连接采用的是卡扣转动连接的方式，这种方式容易造成泄漏，为了避免主喷臂100和副喷臂200的连接处出现漏水等现象，结合图4至图11所示，通过将副喷臂200通过轴承和主喷臂100连接，通过轴承的设置，相对于相关技术中卡扣转动连接方式，能有效减少水的泄漏，从而保证水压，而且，轴承能降低减少副喷臂200和主喷臂100之间转动时的摩擦阻力，提高副喷臂200的转动顺畅性，从而保证副喷臂200的洗涤效果。
进一步地，副喷臂200和主喷臂100之间通过第一轴承400进行连接，第一轴承400包括相互套设的第一外环体420和第一内环体410，第一外环体420环绕第一内环体410设置，并且第一外环体420和第一内环体410之间设置有第一滚珠440，第一滚珠440可以为多个，形成滚珠组，这样便能实现第一外环体420和第一内环体410之间的滚动连接，也即第一外环体420和第一内环体410之间可以相对转动，如此在将第一内环体410连接到副喷臂200时，而第一外环体420连接到主喷臂100时，副喷臂200则通过第一轴承400连接到主喷臂100。
第一内环体410和副喷臂200之间是固定连接，两者不可发生相对转动，第一外环体420和主喷臂100之间是固定连接，两者不可发生相对转动。通过设置第一轴承400，当副喷臂200射出水流时，射出的水流产生反向作用力使得副喷臂200转动，副喷臂200和主喷臂100之间的摩擦形式为滚动摩擦，这样，滚动摩擦对副喷臂200的转动所产生的阻力较小，因此可以减少由于摩擦而造成的水力损失的问题。
结合图3、图4、图6和图7所示，副喷臂200靠近主喷臂100的一侧设置有进水口221，副喷臂200还设有环绕进水口221的第一凸环222，主喷臂100靠近副喷臂200的一侧设 置有出水口111，主喷臂100还设置有环绕出水口111的第二凸环113和环绕第二凸环113的第三凸环114，第二凸环113和第三凸环114之间形成有用于安装第一轴承400的第一安装槽112。
副喷臂200的第一凸环222套设在主喷臂100的第二凸环113外，并且第一凸环222和第二凸环113之间间隙配合，使得副喷臂200的转动不会受到影响，第一轴承400安装到第一安装槽112中，其中第一轴承400的第一外环体420和第三凸环114固定，第一轴承400的第一内环体410则固定在第一凸环222上，这样在副喷臂200转动时，副喷臂200便带动第一内环体410相对于第一外环体420转动，从而有效地降低了摩擦阻力。
结合图7所示，第三凸环114设置有第一卡孔115，第一轴承400的第一外环体420设置有第一卡凸421，这样在第一轴承400安装在第一安装槽112时，第一外环体420上的第一卡凸421便嵌入固定第一卡孔115中而不能移动，实现了有效固定。
第一卡凸421的数量可以有多个，第一卡孔115和第一卡凸421一一对应，多个第一卡凸421沿着第一外环体420的周向间隔设置，多个第一卡孔115沿着第三凸环114的周向间隔设置，大大提高了固定效果。
结合图8和图9所示，第一卡凸421设置斜面422以供第一轴承400安装到第一安装槽112时，引导第一卡凸421滑入第一卡孔115。例如，于图1所示的方向，在垂直于第一轴承400的轴向的方向，第一卡凸421的至少部分的横截面面积由下而上逐渐增加，如此形成了斜面422，在安装第一轴承400时，第一轴承400由上而下安装到第一安装槽112，第一卡凸421的斜面422首先触碰到第三凸环114，如此第一轴承400在力的作用下继续下压直接第一卡凸421嵌入第一卡孔115，并且能防止第一卡凸421沿着反方向脱离第一卡孔115，有效保证了第一轴承400和第一安装槽112的固定。
为了更方便地安装第一轴承400，沿着第三凸环114的周向，间隔设置有第一竖槽116，第一竖槽116沿着第三凸环114的轴向延伸，相对应地，第一轴承400的第一外环体420设置有和第一竖槽116相对应的第一插筋423，第一竖槽116和第一插筋423的配合实现第一轴承400安装时的初步定位，不需要在第一轴承400安装时范围调试位置，提高装配和效率。
进一步地，第一安装槽112的槽底设置第一导流槽117，第一导流槽117与第一竖槽116连通。由于喷臂工作的时候处于水环境中，第一安装槽112不可避免地出现水的渗入，通过在第一安装槽112的槽底设置第一导流槽117，渗入到第一安装槽112的水通过第一导流槽117流动，继而通过第一竖槽116排出第一安装槽112。
结合图4所示，为了使得第一轴承400的转动更为顺畅，第一轴承400还包括第一保持架430，第一保持架430固定在第一内环体410和第一外环体420之间，第一保持架430 上设置有固定部，第一滚珠440固定在第一保持架430的固定部上，如此使得整个滚珠组之间的位置时相对固定的，避免相邻的滚珠发生触碰、挤压而造成的转动不顺畅的情况，保证了副喷臂200的转动效果。
结合图3和图4所示，副喷臂200包括副喷臂上片210和副喷臂下片220，副喷臂下片220的边缘和副喷臂上片210的边缘相对，两者通过焊接实现连接，在副喷臂下片220和副喷臂上片210之间形成有第一容纳腔223，副喷臂下片220设置有进水口221，该进水口221和第一容纳腔223连通，水流从主喷臂100流出，通过该进水口221流入到副喷臂200的第一容纳腔223，副喷臂上片210设置有喷嘴(清洗喷嘴201和驱动喷嘴202)，水流从副喷臂上片210的喷嘴流出，如此降低副喷臂200的制造难度。
主喷臂100包括主喷臂上片110和主喷臂下片120，主喷臂下片120的边缘和主喷臂上片110的边缘相对，两者通过焊接实现连接，在主喷臂下片120和主喷臂上片110之间形成有第二容纳腔118，主喷臂上片110设置有出水口111，该出水口111和第二容纳腔118连通，水流从主喷臂100的出水口111流出，通过该出水口111和副喷臂200的进水口221流入到副喷臂200的第一容纳腔223。主喷臂上片110设置有第二凸环113和第三凸环114。
可以理解的是，主喷臂100和喷臂座300的连接方式也可以采用主喷臂100和副喷臂200连接方式，如此能降低主喷臂100和喷臂座300之间的摩擦阻力。
喷臂需要安装到内胆，例如将喷臂安装到内胆的底部，也即内胆的底部设置有喷臂座300，假如直接将喷臂通过第二轴承500安装到喷臂座300，由于有内胆的阻挡，这样安装会造成不便。因此为了解决这样的问题，结合图5、图6和图10所示，喷臂座300包括安装座310和安装架320，安装架320和安装座310可拆卸连接，安装座310固定在内胆的底部，安装架320上设有卡爪362，安装架320通过该卡爪362与安装座310可拆卸连接，卡爪362沿着安装座310的轴向延伸，主喷臂100通过第二轴承500与安装架320连接。这样，安装座310设置在内胆的底部，由于安装架320和安装座310是可拆卸连接的，因此安装架320可在内胆外通过第二轴承500和主喷臂100进行连接，这种情况下并没有内胆的阻挡，更加方便主喷臂100和安装架320的连接。在将安装架320和主喷臂100通过第二轴承500连接后，再将整体通过安装架320连接到安装座310上，实现了快速安装。
结合图5所示，第二轴承500包括相互套设的第二外环体520和第二内环体510，第二外环体520环绕第二内环体510设置，并且第二外环体520和第二内环体510之间设置有第二滚珠540，第二滚珠540可以为多个，形成滚珠组，这样便能实现第二外环体520和第二内环体510之间的滚动连接，也即第二外环体520和第二内环体510之间可以相对转动，如此在将第二内环体510连接到主喷臂100，而第二外环体连接到安装架320时，也 即主喷臂100通过第二轴承500连接到安装架320，继而可通过安装架320连接到安装座310。
第二内环体510和主喷臂100之间是固定连接，两者不可发生相对转动，第二外环体520和安装架320之间是固定连接，两者不可发生相对转动。通过设置第二轴承500，当主喷臂100射出水流时，射出的水流产生反向作用力从而使得主喷臂100转动，主喷臂100和安装架320的摩擦形式为滚动摩擦，这样，滚动摩擦对主喷臂100的转动所产生的阻力较小，因此可以减少由于摩擦而造成的水力损失的问题。
进一步地，主喷臂100朝向喷臂座300进水管121，进水管121形成进水口，进水管121的中轴和主喷臂100的转动轴线共轴设计，主喷臂100通过进水管121穿设安装架320，安装架320设置有环绕进水管121的第二安装槽321，第二安装槽321用于安装第二轴承500。
结合图5所示，主喷臂100的进水管121穿设安装架320而嵌入于安装座310中，和安装座310连通，第二轴承500安装到第二安装槽321中，其中第二轴承500的第二外环体520和第二安装槽的槽壁322连接，第二轴承500的第二内环体510则固定在进水管121上，这样在主喷臂100转动时，主喷臂100便带动第二内环体510相对于第二外环体520转动，降低摩擦阻力。
结合图10所示，第二安装槽的槽壁322设置有第二卡孔323，第二轴承500的第二外环体520设置有第二卡凸521，这样在第二轴承500安装在第二安装槽321时，第二外环体520上的第二卡凸521便嵌入固定第二卡孔323中而不能移动，实现了有效固定。
第二卡凸521的数量可以有多个，第二卡孔323和第二卡凸521一一对应，多个第二卡凸521沿着第二外环体520的周向间隔设置，多个第二卡孔323沿着第二安装槽的槽壁322的周向间隔设置，大大提高了固定效果。
结合图9所示，第二卡凸521设置斜面522以供第二轴承500安装到第二安装槽321时，引导第二卡凸521滑入第二卡孔323。例如，于图8和9所示的方向，在垂直于第二轴承500的轴向的方向，第二卡凸521的至少部分的横截面面积由下而上逐渐增加，如此形成了斜面522，在安装第二轴承500时，第二轴承500由上而下安装到第二安装槽321，第二卡凸521的斜面522首先触碰到第二安装槽的槽壁322，如此第二轴承500在力的作用下继续下压直接第二卡凸521嵌入第二卡孔323，并且能防止第二卡凸521沿着反方向脱离第二卡孔323，有效保证了第二轴承500和第二安装槽321的固定。
为了更方便地安装第二轴承500，沿着第二安装槽321的周向，第二安装槽的槽壁322间隔设置有第二竖槽324，第二竖槽324沿着第二安装槽321的轴向延伸，相对应地，第二轴承500的第二外环体520设置有和第二竖槽324相对应的第二插筋523，第二竖槽324 和第二插筋523的配合实现第二轴承500安装时的初步定位，不需要在第二轴承500安装时范围调试位置，提高装配和效率。
进一步地，第二安装槽321的槽底设置第二导流槽325，第二导流槽325与第二竖槽324连通。由于喷臂工作的时候处于水环境中，第二安装槽321不可避免地出现水的渗入，通过在第二安装槽321的槽底设置第二导流槽325，渗入到第二安装槽321的水通过第二导流槽325流动，继而通过第二竖槽324排出第二安装槽321。
结合图5所示，为了使得第二轴承500的转动更为顺畅，第二轴承500还包括第二保持架530，第二保持架530固定在第二内环体510和第二外环体520之间，第二保持架530上设置有固定部，第二滚珠540固定在第人保持架的固定部上，如此使得整个滚珠组之间的位置是相对固定的，避免相邻的滚珠发生触碰、挤压而造成的转动不顺畅的情况，保证了主喷臂100的转动效果。
结合图3和图5所示，主喷臂100包括主喷臂上片110和主喷臂下片120，主喷臂下片120的边缘和主喷臂上片110的边缘相对，两者通过焊接实现连接，在主喷臂下片120和主喷臂上片110之间形成有第二容纳腔118，主喷臂下片120设置有进水管121，该进水管121和第二容纳腔118连通，水流从洗涤泵通过进水管121输入到第二容纳腔118，主喷臂上片110设置有喷嘴(清洗喷嘴和驱动喷嘴)，水流从主喷臂上片110的喷嘴流出，如此降低主喷臂100的制造难度。
以上所述仅为本申请的优选实施例，并非因此限制本申请的专利范围，凡是在本申请的构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (14)

  1. 一种喷臂，其中，包括：
    主喷臂，适于绕其转动轴线转动，所述主喷臂的转矩为Mc；以及
    副喷臂，可转动设于所述主喷臂，所述副喷臂的转动轴线与所述主喷臂的转动轴线非共轴，所述副喷臂对所述主喷臂产生的转矩为Ms，满足Mc/Ms＞3/2。
  2. 根据权利要求1所述的喷臂，其中，所述主喷臂与所述副喷臂的转动方向相反。
  3. 根据权利要求1或2所述的喷臂，副喷臂200对主喷臂100产生的动量为M1，主喷臂自身产生的动量为M2，动量M1与M2的叠加动量为主喷臂叠加动量M3，则M3min/M3max>25％。
  4. 根据权利要求1-3中任一项所述的喷臂，其中，所述副喷臂的转速大于所述主喷臂的转速。
  5. 根据权利要求1-4中任一项所述的喷臂，其中，所述副喷臂的转速为n1，所述主喷臂的转速为n2，满足n1/n2＞1且n1/n2≠1.5。
  6. 根据权利要求1-4中任一项所述的喷臂，其中，所述副喷臂的转速为n1，所述主喷臂的转速为n2，满足n1/n2＞2。
  7. 根据权利要求1-6中任一项所述的喷臂，其中，所述副喷臂设有驱动喷嘴，所述副喷臂的驱动喷嘴在所述副喷臂的长度方向上对称分布。
  8. 根据权利要求1-7中任一项所述的喷臂，其中，所述主喷臂设有驱动喷嘴，所述主喷臂位于其转动轴线一侧的部分为第一臂体，另一侧的部分为第二臂体，所述主喷臂的驱动喷嘴设于所述第一臂体，所述副喷臂可转动设于所述第二臂体。
  9. 根据权利要求8所述的喷臂，其中，所述主喷臂还设有清洗喷嘴，所述清洗喷嘴设于所述第一臂体。
  10. 根据权利要求8或9所述的喷臂，其中，所述副喷臂可转动设于所述第二臂体的末端。
  11. 根据权利要求1-10中任一项所述的喷臂，其中，所述副喷臂通过轴承与所述主喷臂可转动连接；和/或，所述主喷臂通过轴承与喷臂座可转动连接。
  12. 根据权利要求11所述的喷臂，其中，定义连接所述副喷臂与所述主喷臂的轴承为第一轴承，所述第一轴承包括第一内环体与第一外环体，所述第一内环体设于所述第一外环体内且与所述第一外环体可转动连接，所述第一内环体与所述第一外环体之间设有第一滚珠，所述第一内环体与所述副喷臂连接，所述第一外环体与所述主喷臂连接。
  13. 根据权利要求11或12所述的喷臂，其中，定义连接所述主喷臂与喷臂座的轴承为第二轴承，所述第二轴承包括第二内环体与第二外环体，所述第二内环体设于所述第二外 环体内且与所述第二外环体可转动连接，所述第二内环体与所述第二外环体之间设有第二滚珠，所述第二内环体与所述主喷臂连接，所述第二外环体与所述喷臂座连接。
  14. 一种洗碗机，其中，包括权利要求1至13任一项所述的喷臂。
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