CN107028573B - Spray arm device for dish washing machine and dish washing machine with same - Google Patents

Spray arm device for dish washing machine and dish washing machine with same Download PDF

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Publication number
CN107028573B
CN107028573B CN201611146252.0A CN201611146252A CN107028573B CN 107028573 B CN107028573 B CN 107028573B CN 201611146252 A CN201611146252 A CN 201611146252A CN 107028573 B CN107028573 B CN 107028573B
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CN
China
Prior art keywords
spray arm
gear
spray
arm body
water pipe
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Application number
CN201611146252.0A
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Chinese (zh)
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CN107028573A (en
Inventor
黎铭峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Original Assignee
Midea Group Co Ltd
Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
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Priority to CN201611146252.0A priority Critical patent/CN107028573B/en
Publication of CN107028573A publication Critical patent/CN107028573A/en
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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
    • A47L15/42—Details
    • A47L15/4278—Nozzles
    • A47L15/428—Rotary nozzles
    • 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
    • A47L15/23—Rotary spraying devices moved by means of the sprays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • 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
    • A47L2601/00—Washing methods characterised by the use of a particular treatment
    • A47L2601/03—Pressurised, gaseous medium, also used for delivering of cleaning liquid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Washing And Drying Of Tableware (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

The invention discloses a spray arm device for a dish washer and the dish washer with the same, the spray arm device for the dish washer comprises: a spray arm water pipe; the central gear is arranged at the water outlet of the spray arm water pipe, and the relative positions of the central gear and the spray arm water pipe are fixed; the planetary gear is in transmission connection with the central gear; the gear carrier, the sun gear and the planetary gear are rotatably arranged on the gear carrier; the spray arm body is fixedly connected with the planetary gear relatively, and a spray hole communicated with a spray arm water pipe is formed in the spray arm body. According to the spray arm device for the dish washer, water flow entering the spray arm water pipe can be further sprayed out of the spray holes through the spray arm body from the water outlet of the spray arm water pipe. The spray arm body and the planetary gear can synchronously revolve around the central shaft of the spray arm body, and simultaneously the spray arm body and the planetary gear can synchronously revolve around the central shaft of the gear frame, so that a preset spray track can be formed through spray holes on the spray arm body, and tableware can be washed better.

Description

Spray arm device for dish washing machine and dish washing machine with same
Technical Field
The invention relates to the technical field of household appliances, in particular to a spray arm device for a dish washer and the dish washer with the same.
Background
In the related art, the working principle of the household dish washer is as follows: the tableware is subjected to continuous covering, spraying and washing through the rotary spraying of a plurality of spray arms in the tableware, and the tableware is washed by combining the functions of water reflection, splashing, flowing and the like. For a typical dishwasher, the cross-sectional shape of the interior washing area is approximately square due to the close width and depth dimensions, while the general spray arm rotates to a circular spray area, such that the four corners of the square are not covered, which significantly affects the overall cleaning effect.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a spray arm device for a dishwasher, which has an enlarged cleaning coverage and a good cleaning effect.
Another object of the present invention is to propose a dishwasher provided with a spray arm device as described above for a dishwasher.
According to an embodiment of the first aspect of the present invention, a spray arm device for a dishwasher includes: a spray arm water pipe; the central gear is arranged at the water outlet of the spray arm water pipe, and the relative positions of the central gear and the spray arm water pipe are fixed; the planetary gear is in transmission connection with the central gear; the sun gear and the planet gears are rotatably arranged on the gear carrier; the spray arm body is fixedly connected with the planetary gear relatively, and a spray hole communicated with the spray arm water pipe is formed in the spray arm body.
According to the spray arm device for the dish washer, water flow entering the spray arm water pipe can be further sprayed out of the spray hole through the spray arm body from the water outlet of the spray arm water pipe. The spray arm body and the planetary gear can synchronously revolve around the central shaft of the spray arm body, and simultaneously the spray arm body and the planetary gear can synchronously revolve around the central shaft of the gear frame, so that a preset spray track can be formed through spray holes on the spray arm body, and tableware can be washed better.
In addition, the spray arm device for a dishwasher according to the above embodiment of the present invention has the following additional technical features:
according to some embodiments of the invention, the spray arm device further comprises a transmission gear rotatably provided on the gear frame, and the transmission gear is externally meshed with the sun gear and the planetary gear, respectively.
According to some embodiments of the invention, the sun gear and the planet gears have a gear ratio of 4:3.
According to some embodiments of the invention, the distance from the center axis of the spray arm body to the center axis of the gear frame is in the range of 30mm to 75 mm.
According to some embodiments of the invention, the spray arm body is formed with a central column extending upwards, a connecting shaft is formed at the upper end of the central column, the planetary gear is formed with a shaft hole matched with the connecting shaft, the connecting shaft is inserted into the shaft hole, and the connecting shaft is in spline connection with the shaft hole.
According to some embodiments of the invention, the spray arm device comprises a clamping block, wherein the clamping block is rotatably connected with the central gear, the clamping block is connected with the gear frame, and the relative position of the clamping block and the gear frame is fixed.
Further, the sun gear includes: the gear ring is clamped with the spray arm water pipe; the first shaft sleeve is connected with the gear ring and is positioned in the gear ring, the first shaft sleeve is coaxial with the gear ring and is spaced apart, the clamping block is rotatably connected with the first shaft sleeve, one end of the clamping block penetrates through the first shaft sleeve to be connected with the gear rack in a clamping mode, and a water passing hole which is communicated with the spray arm water pipe and the gear rack is formed in the clamping block.
Further, a second shaft sleeve is arranged at the water outlet of the spray arm water pipe, the second shaft sleeve is inserted between the gear ring and the first shaft sleeve, the second shaft sleeve is clamped with the gear ring, a limiting flange is arranged at the other end of the clamping block, and the limiting flange is rotatably arranged between the end face of the first shaft sleeve and the inner surface of the spray arm water pipe.
According to some embodiments of the invention, the spray arm body includes a plurality of spray arms spaced about a rotational central axis of the spray arm body, each of the spray arms having the spray orifice formed therein.
According to some embodiments of the invention, the sun gear cooperates with the planet gears to conform the trajectory formed by the orifices to the parametric equation: x=a+b (ang/3), y=a (ang) -B (ang/3), wherein ang is the angle through which the gear rack rotates, a is the distance from the central axis of the spray arm body to the central axis of the gear rack, and B is the distance from the spray orifice to the central axis of the spray arm body.
According to a second aspect of the present invention, an embodiment of a dishwasher includes: a dishwasher body in which a washing chamber is formed; the spray arm device is arranged in the washing cavity, and the spray arm device is the spray arm device for the dish washer.
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
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic view of the overall structure of a spray arm device according to an embodiment of the present invention.
Fig. 2 is an exploded view of the assembly relationship of the spray arm device according to the embodiment of the present invention.
Fig. 3 is an enlarged view of a portion of the spray arm assembly of fig. 2 in an exploded view in partial assembly relationship.
Fig. 4 is a schematic cross-sectional structure of a spray arm device according to an embodiment of the present invention.
Fig. 5 is a partial enlarged view at a circle C in fig. 4.
Fig. 6 is a schematic view of the overall structure of a boom pipe according to an embodiment of the present invention.
Fig. 7 is a schematic view of a partial cross-sectional structure of a carrier according to an embodiment of the present invention.
Fig. 8 is a schematic view of the overall structure of a spray arm body according to an embodiment of the present invention, wherein a broken line shows a spray trajectory of a spray orifice.
Fig. 9 is a schematic diagram showing the meshing relationship of the sun gear, the transmission gear, and the planetary gear in the spray arm device according to the embodiment of the invention.
Fig. 10 is a schematic view of a transmission mechanism of a sun gear, a transmission gear, and a planetary gear in the spray arm device of fig. 9.
FIG. 11 is a schematic diagram of a spray trajectory corresponding to a spray orifice on a spray arm in a spray arm device according to an embodiment of the present invention, wherein a dashed border on the outer periphery of the diagram represents a square border within a dishwasher.
Fig. 12 is a schematic view of a spray trajectory corresponding to a spray hole on another spray arm in the spray arm device according to an embodiment of the present invention, wherein a dashed border on the outer periphery of the figure represents a square border in the dishwasher.
Fig. 13 is a schematic view of a spray trajectory corresponding to a spray hole on a further spray arm in the spray arm device according to an embodiment of the present invention, wherein a dotted border on the outer periphery of the figure represents a square border in the dishwasher.
Fig. 14 is a schematic view of injection trajectories corresponding to injection holes on a plurality of spray arms in a spray arm device according to an embodiment of the present invention, wherein a dashed border on the outer periphery of the drawing represents a square border in a dishwasher.
Reference numerals:
a spray arm apparatus 100 for a dishwasher,
a spray arm water pipe 1, a water outlet 11 of the spray arm water pipe 1, a second shaft sleeve 12, a second clamping hook 13,
a sun gear 2, a gear ring 21, a first sleeve 22, a second catch 23,
the planetary gears 3, the shaft holes 31,
the gear frame 4, the central shaft 41 of the gear frame 4, the transmission shaft 42, the sleeve 43, the first hook 431, the water inlet 432, the water outlet 44, the water channel 45,
the spray arm body 5, the spray orifice 51, the central column 52, the connecting shaft 521, the spray arm 53, the central shaft 54 of the spray arm body 5, the water inlet 55,
the transmission gear wheel 6 is provided with a transmission gear,
the clamping block 7, the water passing hole 71, the limiting flange 72 and the first clamping protrusion 73.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A spray arm device 100 for a dishwasher according to an embodiment of the present invention is described in detail with reference to fig. 1 to 14.
Referring to fig. 1, 2 and 8, a spray arm device 100 for a dishwasher according to an embodiment of a first aspect of the present invention includes: spray arm water pipe 1, sun gear 2, planetary gear 3, gear carrier 4 and spray arm body 5.
Specifically, referring to fig. 6 and 3, the sun gear 2 is provided at the water outlet 11 of the boom pipe 1, so that the water flow entering the boom pipe 1 can flow from the water outlet 11 of the boom pipe 1 to the boom body 5 further. And the relative position of the sun gear 2 and the spray arm water pipe 1 is fixed. This ensures the reliability of the use of the spray arm device 100.
Referring to fig. 1 and 2, the planetary gear 3 is in driving connection with the sun gear 2, which facilitates a further transmission of power. The sun gear 2 and the planet gears 3 are both rotatably arranged on a carrier 4. That is, the sun gear 2 is rotatably provided on the carrier 4; the planetary gears 3 are rotatably provided on the carrier 4. Thereby, the rotation of the carrier 4 around the sun gear 2 is facilitated, the carrier 4 rotates with the planetary gears 3, the carrier 4 also revolves around the central axis 41 of the carrier 4, and the central axis of the sun gear 2 is the central axis 41 of the carrier 4.
The spray arm body 5 is fixedly connected with the planetary gear 3 relatively, so that synchronous rotation of the spray arm body 5 and the planetary gear 3 can be realized. The spray arm body 5 is provided with a spray hole 51, and the spray hole 51 is communicated with the spray arm water pipe 1. So that the water flow entering the spray arm water pipe 1 can be sprayed out from the spray hole 51 through the spray arm body 5 by the water outlet 11 of the spray arm water pipe 1, and the tableware is washed by combining the functions of water flow reflection, splashing, flowing and the like.
The water flow entering the spray arm water pipe 1 can be further sprayed from the spray hole 51 through the spray arm body 5 from the water outlet 11 of the spray arm water pipe 1. In the process, as the water flow has a certain pressure, the water flow can drive the spray arm body 5 and the planetary gear 3 to synchronously rotate; the planet gears 3 are rotatably arranged on the gear frame 4, so that the gear frame 4 can rotate around the central shaft 54 of the spray arm body 5 through the rotation of the planet gears 3 (at the moment, the gear frame 4 can rotate around the central shaft 54 of the spray arm body 5 along with the planet gears 3); since the planetary gears 3 are in driving connection with the sun gear 2, the sun gear 2 can be driven to rotate by the rotation of the planetary gears 3, and since the sun gear 2 is rotatably provided on the carrier 4, the rotation of the carrier 4 relative to the sun gear 2 is easy to achieve (at this time, the carrier 4 can also revolve around the central axis 41 of the carrier 4). Thus, the spray arm 5 can rotate around the central axis 54 of the spray arm 5 in synchronization with the planetary gear 3, and the spray arm 5 can also revolve around the central axis 41 of the gear frame 4 in synchronization with the planetary gear 3, so that a predetermined spray trajectory (for example, a square-like spray trajectory) can be formed through the spray holes 51 on the spray arm 5, and washing of tableware can be better realized.
According to the spray arm device 100 for a dishwasher of the embodiment of the present invention, the water flow entering the spray arm water pipe 1 can be further sprayed from the spray hole 51 through the spray arm body 5 from the water outlet 11 of the spray arm water pipe 1. Since the spray arm 5 can rotate around the central axis 54 of the spray arm 5 in synchronization with the planetary gear 3, and the spray arm 5 and the planetary gear 3 can also revolve around the central axis 41 of the gear frame 4 in synchronization, a predetermined spray track can be formed through the spray holes 51 on the spray arm 5, and tableware can be washed better.
Referring to fig. 9 and 10, in accordance with some embodiments of the present invention, the spray arm device 100 further includes a drive gear 6, the transmission gear 6 is rotatably provided on the carrier 4, and the transmission gear 6 is externally meshed with the sun gear 2 and the planetary gears 3, respectively. In other words, the transmission gear 6 is externally meshed with the sun gear 2, and the transmission gear 6 and the planetary gears 3 are also externally meshed. This ensures that the rotation direction of the planetary gear 3 is opposite to the rotation direction of the sun gear 2, that is, the synchronous rotation direction of the planetary gear 3 with the spray arm body 5 is opposite to the synchronous revolution direction of the planetary gear 3 with the spray arm body 5.
Specifically, the power can be transmitted to the transmission gear 6 and further to the sun gear 2 by the rotation of the planetary gear 3, so that the carrier 4 can not only rotate about the central axis 54 of the spray arm body 5 but also revolve around the central axis 41 of the carrier 4, thereby enabling the spray holes 51 to further form a predetermined spray trajectory.
Of course, the invention is not limited thereto, and in other embodiments of the invention, the transmission gear 6 and the planetary gear 3 may also form a planetary gear assembly, which is externally meshed with the sun gear 2, and all gears in the planetary gear assembly are externally meshed. Further, other gears than the planetary gears and the sun gear 2 are called transmission gears. The planetary gear assembly and the sun gear 2 form a gear train transmission which is a double-stage transmission. Preferably, the gear train transmission mechanism is a two-stage transmission or a four-stage transmission. Since the sun gear 2 is fixed, it is known from the double-stage transmission that the rotation direction and the revolution direction of the planetary gear 3 are opposite, that is, the rotation direction and the revolution direction of the spray arm body 5 are opposite, which can provide an advantage for forming a predetermined spray trajectory.
For convenience of description, the present invention will be described by taking the gear train transmission mechanism as an example of a two-stage transmission, but this should not be construed as limiting the scope of the present invention.
Referring to fig. 7 in combination with fig. 2, the carrier 4 is formed with a drive shaft 42 for mounting and positioning the drive gear 6, the drive shaft 42 extending upward (upward as viewed in fig. 2); the transmission gear 6 is formed with a hole extending in a direction (for example, up-down direction) parallel to the central axis 41 of the carrier 4, the hole being fitted with the transmission shaft 42, and the transmission gear 6 being fitted with the shaft hole of the carrier 4. Thereby, an efficient transmission of power can be achieved by the cooperation of the gear carrier 4 and the transmission gear 6.
Referring to FIG. 2 in combination with FIGS. 9 and 10, the sun gear 2 and the planet gears 3 have a tooth ratio of 4:3 according to some embodiments of the invention. For example, the number of teeth of the sun gear 2 is 48, the number of teeth of the planetary gears 3 is 36, and the number of teeth of the transmission gear 6 is 18. Further, since the sun gear 2 is fixed, it is known that the rotation speed ratio of the rotation and revolution of the planetary gear 3 together with the spray arm body 5 is 1-3, i.e., the rotation and revolution directions are opposite, and the rotation speed is one third of the revolution speed, based on the gear ratio and the meshing relationship. This may provide an advantage for forming a predetermined injection trajectory.
Referring to fig. 4 and 2, according to some embodiments of the present invention, the distance from the center axis 54 of the spray arm body 5 to the center axis 41 of the gear rack 4 (refer to the distance a in fig. 4) may be in the range of 30mm to 75 mm. The distance a from the center axis 54 of the spray arm body 5 to the center axis 41 of the carrier 4 is the revolution radius of the planetary gear 3, which is determined by the size design of the gear mechanism.
Preferably, the distance from the center axis 54 of the spray arm body 5 to the center axis 41 of the gear rack 4 (refer to the distance a in fig. 4) may be in the range of 40mm to 60 mm. Thus, the structure of the spray arm device 100 can be made more compact while forming a predetermined spray trajectory.
The distance from the central axis 54 of the spray arm body 5 to the central axis 41 of the gear rack 4 may be 30mm, 35 mm, 40mm, 45mm, 50 mm, 55 mm, 60mm, 65 mm, 70 mm, 75mm, or the like. The distance from the central axis 54 of the spray arm body 5 to the central axis 41 of the gear rack 4 can be adaptively set according to actual needs.
Referring to fig. 2 and 3 and fig. 9, according to some embodiments of the present invention, a center post 52 is formed on the spray arm body 5, the center post 52 extends upward, a connection shaft 521 (e.g., a spline shaft, etc.) is formed at an upper end of the center post 52 (referring to an upper end of the center post 52 in fig. 3), a shaft hole 31 (referring to fig. 9, the shaft hole 31 may be a spline hole, etc.) is formed on the planetary gear 3, the shaft hole 31 is engaged with the connection shaft 521, the connection shaft 521 is inserted into the shaft hole 31, and the connection shaft 521 is spline-connected with the shaft hole 31. Thereby, torque can be transmitted through the spline connection, so that synchronous rotation of the planetary gear 3 and the spray arm body 5 is realized.
As shown in fig. 2 and 3, according to some embodiments of the present invention, the spray arm device 100 includes a latch 7, the latch 7 is rotatably connected to the sun gear 2, and the latch 7 is connected to the gear frame 4, and the relative positions of the latch 7 and the gear frame 4 are fixed. Thereby, the sun gear 2 can be restrained between the latch 7 and the gear frame 4, thereby improving the reliability of use of the spray arm device 100.
Further, as shown in fig. 3, the sun gear 2 includes: a ring gear 21 and a first sleeve 22. Specifically, the gear ring 21 is clamped with the spray arm water pipe 1, the first shaft sleeve 22 is connected with the gear ring 21, the first shaft sleeve 22 is located in the gear ring 21, the first shaft sleeve 22 is far away from the central line of the sun gear 2, and the gear ring 21 is adjacent to the central line of the sun gear 2. And the first sleeve 22 is coaxial with and spaced apart from the ring gear 21. That is, the central axis of the first boss 21 is coaxial with the central axis of the ring gear 21, and the radial dimensions of the first boss 21 and the ring gear 21 may not be equal. Thereby, a fixed connection between the sun gear 2 and the boom water pipe 1 can be achieved.
The clamping block 7 is rotatably connected with the first shaft sleeve 22, and one end (referring to the lower end of the clamping block 7 in fig. 3) of the clamping block 7 passes through the first shaft sleeve 22 to be clamped with the gear rack 4, a water passing hole 71 is formed in the clamping block 7, and the water passing hole 71 is communicated with the spray arm water pipe 1 and the gear rack 4. In this way, the water flow entering the spray arm water pipe 1 can be sprayed out from the spray hole 51 through the water outlet 11 of the spray arm water pipe 1, the water passing hole 71 formed in the clamping block 7 and the spray arm body 5, so that the tableware can be washed better.
For example, referring to fig. 2, 3 and 7, a sleeve 43 extending upward is formed at one end of the carrier 4, a plurality of first hooks 431 are formed in the sleeve 43 at intervals along the circumferential direction of the sleeve 43, and a plurality of first hooks 73 engaged with the plurality of first hooks 431 are provided at the lower peripheral edge of the clip 7. Thereby, the reliable connection between the gear frame 4 and the latch 7 can be achieved by the cooperation of the first latch 73 and the first latch 431.
Referring to fig. 7, a water inlet 432 is formed in the sleeve 43, a water outlet 44 communicating with the water inlet 432 is formed at the other end of the carrier 4, and a water passage 45 is formed between the water inlet 432 and the water outlet 44.
Referring to fig. 2 and 8, the spray arm body 5 is formed with a water inlet 55 communicating with the water outlet 44, and water is sprayed from the water inlet 44 through the plurality of spray holes 51.
The water flow Cheng Juti through the spray arm device 100 for a dishwasher according to an embodiment of the present invention is: the water flow entering the spray arm water pipe 1 can flow from the water outlet 11 of the spray arm water pipe 1, through the water passing hole 71 formed in the clamping block 7, through the water flow inlet 432 on the gear rack 4, flow through the water flow channel 45, flow into the water inlet 55 on the spray arm body 5 through the water flow outlet 44, and then be further sprayed out from the spray hole 51 through the spray arm body 5, so that the tableware can be washed better.
Further, referring to fig. 3 to 6, a second sleeve 12 is disposed at the water outlet 11 of the spray arm water pipe 1, the second sleeve 12 is inserted between the gear ring 21 and the first sleeve 22, the second sleeve 12 is clamped with the gear ring 21, a limit flange 72 is disposed at the other end of the clamping block 7 (refer to the upper end of the clamping block 7 in fig. 3), and the limit flange 72 is rotatably disposed between the end surface of the first sleeve 22 and the inner surface of the spray arm water pipe 1. This makes it possible to reliably position the upper end of the clip 7 between the sun gear 2 and the boom pipe 1, thereby improving the reliability of use of the boom apparatus 100.
Specifically, referring to fig. 3 and 6, the gear ring 21 of the sun gear 2 is provided with a plurality of second engaging protrusions 23, and the second sleeve 12, which is the outer periphery of the water outlet 11 of the boom water pipe 1, is provided with a plurality of second engaging hooks 13 engaged with the plurality of second engaging protrusions 23. Thereby, the reliable connection between the sun gear 2 and the spray arm water pipe 1 can be realized through the cooperation of the second clamping convex 23 and the second clamping hook 13.
Referring to fig. 1, 2 and 8, according to some embodiments of the present invention, the spray arm body 5 includes a plurality of spray arms 53, the plurality of spray arms 53 being spaced around a rotation center axis of the spray arm body 5 (i.e., a center axis 54 of the spray arm body 5), and each spray arm 53 having a spray hole 51 formed thereon. Thus, a square-like spray trajectory can be formed by the cooperation of the plurality of spray arms 53, and the coverage of the spray trajectory can be enlarged, so that the washing effect can be improved.
For example, in the embodiment of the present invention shown in fig. 8, the spray arm body 5 includes three spray arms 53, and the three spray arms 53 are arranged at regular intervals around the rotation center axis of the spray arm body 5, that is, the angle between adjacent two of the three spray arms 53 is 120 °. This balances the force, and thus improves the operational stability and operational reliability of the spray arm device 100 to some extent.
The spray holes 51 formed on each spray arm 53 may be a plurality of spray holes 51 spaced apart, that is, the spray trajectories formed by the corresponding spray holes 51 on each spray arm 53 may not overlap, or the spray trajectories formed by the spray holes 51 on the spray arm body 5 may not overlap. Thus being beneficial to avoiding the dead angle of cleaning, expanding the cleaning range and improving the cleaning effect.
Referring to fig. 4 in combination with fig. 1, according to some embodiments of the invention, sun gear 2 cooperates with planet gears 3 to conform the trajectory formed by orifices 51 to the parametric equation:
x=a×cos (ang) +b×cos (ang/3), y=a×sin (ang) -b×sin (ang/3), where ang is the angle through which the gear rack 4 rotates, a is the distance from the central axis 54 of the spray arm body 5 to the central axis 41 of the gear rack 4, and B is the distance from the spray orifice 51 to the central axis 54 of the spray arm body 5 (for example, the distance B in fig. 4 shows the distance from one spray orifice 51 to the central axis 54 of the spray arm body 5). Thus, a square-like spray trace line can be formed, and the coverage of the spray trace can be enlarged, thereby improving the washing effect.
According to a second aspect of the invention, a dishwasher (not shown in the drawings) comprises: a dishwasher body in which a washing chamber is formed; the spray arm device is arranged in the washing cavity, and the spray arm device is the spray arm device 100 for the dish washing machine. Thus, by providing the spray arm device 100 for a dishwasher of the above-described first aspect embodiment on the dishwasher, the washing effect of the dishwasher can be effectively improved.
The operation of the spray arm device 100 for a dishwasher according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 14.
Specifically, the water flow entering the spray arm water pipe 1 can flow from the water outlet 11 of the spray arm water pipe 1, through the water passing hole 71 formed in the fixture block 7, through the water flow inlet 432 on the gear rack 4, flow through the water flow channel 45, flow into the water inlet 55 on the spray arm body 5 through the water outlet 44, and further be sprayed out from the spray hole 51 through the spray arm body 5, so that the tableware can be washed better. The operation of the spray arm device 100 for a dishwasher according to an embodiment of the present invention is completed.
The spray arm device 100 for a dishwasher according to an embodiment of the present invention mainly includes: a sun gear 2 fixed at the water outlet 11 of the boom pipe 1 (e.g., the upper boom pipe), and a carrier 4 mounted on the sun gear 2, the carrier 4 and the sun gear 2 being not fixedly connected to each other, so that the carrier 4 can freely rotate with respect to the sun gear 2. The gear frame 4 is provided with a group of planetary gear mechanisms which are externally meshed with the sun gear 2, and the planetary gear 3 at the outermost end is fixedly connected to the spray arm body 5. Further, the spray arm body 5 is provided with three spray arms 53, every two spray arms are separated by 120 degrees, each spray arm 53 is provided with a plurality of spray holes 51, the spray holes 51 form a motion track line with characteristics, and coverage spray washing of a square washing area can be realized.
In particular, the planetary gear mechanism is a double-stage transmission, especially two-stage and four-stage. The outermost planetary gear is a first planetary gear (for example, the planetary gear 3), and the first planetary gear is integrally connected with the spray arm body 5 through a spline structure, so that synchronous rotation of the first planetary gear and the spray arm body is realized. Further, other planetary gears are called transmission gears in addition to the first planetary gear and the sun gear 2.
Specifically, the external engagement mode is adopted for the cooperation between the gears. Since the sun gear 2 is fixed, it is known from the double-stage transmission relation that the rotation direction and the revolution direction of the first planetary gear are opposite, that is, the rotation direction and the revolution direction of the spray arm body 5 are opposite.
Specifically, the ratio of the sun gear 2 to the first planetary gears is 4:3, for example, the sun gear 2 has 48 teeth and the first planetary gear is 36 teeth. Further, since the sun gear 2 is fixed, it is known that the rotation speed ratio of the first planetary gear together with the rotation and revolution of the spray arm body 5 is 1 to 3, i.e., the rotation and revolution directions are opposite, and the rotation speed is one third of the revolution speed, based on the gear ratio and the meshing relationship.
Specifically, the distance a from the rotation axis of the first planetary gear (e.g., the center axis 54 of the spray arm body 5) to the revolution axis thereof (e.g., the center axis 41 of the carrier 4) is the revolution radius of the first planetary gear, which is determined by the size design of the gear mechanism. The invention sets the value range of A to be 30mm to 75mm, especially 40mm to 60 mm.
In particular, the sun gear 2 is fixed on the spray arm water pipe 1, fixed with respect to the dishwasher. For the spray arm device 100 for the dish washer, the sun gear 2 is arranged at the water outlet 11 of the spray arm water pipe 1, the sun gear 2 is provided with a plurality of small bosses (namely second clamping bosses 23), correspondingly, the periphery of the water outlet 11 of the spray arm water pipe 1 is provided with the second clamping hooks 13, and the two are matched to realize the fixed connection of the sun gear 2 and the spray arm water pipe 1.
Specifically, the carrier 4 is mounted on the sun gear 2, and the sleeve 43 of the carrier 4 is passed through the first sleeve 22 of the sun gear 2 when mounted, and then the latch 7 is mounted, and the sun gear 2 is restrained between the latch 7 and the carrier 4. The center of the clamping block 7 is provided with a water passing hole 71, and at this time, the water outlet 11 of the spray arm water pipe 1 flows out of the washing water, and passes through the water passing hole 71 on the clamping block 7 and is led to the inner cavity (namely, the water flow channel 45) of the gear frame 4. The other end of the gear rack 4 is provided with a water outflow port 44, and the water outflow port 44 opens into the spray arm body 5.
Specifically, the carrier 4 serves as a carrier for all the planetary gears, and the carrier 4 revolves around a central shaft (central shaft 41 of the carrier 4) together with all the planetary gears as the planetary gears rotate. Further, the first planetary gear is located above the gear frame 4, and the spray arm body 5 is located below the gear frame 4. The center post 52 of the spray arm body 5 is inserted through the water outflow port 44 (e.g., through hole) of the gear frame 4 at the time of installation, and the end of the center post 52 (e.g., the upper end of the center post 52) is provided with a connecting shaft 521 such as a spline structure. Correspondingly, the first planetary gear has a shaft hole 31, such as a splined hole, at the center thereof. After the first planetary gear is sleeved into the central column 52, a screw is screwed, so that the first planetary gear and the spray arm body 5 can be fixedly connected, and the spray arm body 5 can freely rotate relative to the gear frame 4.
Specifically, the spray arm body 5 is provided with an inner cavity, a water inlet 55 is arranged in the middle position, and the water inlet 55 is communicated with the water outlet 44 of the gear frame 4 during installation. The spray arm body 5 is provided with three spray arms 53, every two spray arms are separated by 120 degrees, and each spray arm 53 is provided with a plurality of spray holes 51. And, typically, the number of orifices 51 on each of the spray arms 53 is the same, the spray angle is upward.
Specifically, the trajectory lines formed by the movement of the spray holes are special curves which are close to squares, and the trajectory lines meet the following parameter equations: x=a+b (ang/3), y=a (ang) -B (ang/3), wherein ang is the angle through which the carrier 4 rotates, i.e., the revolution angle. A is a distance from the center axis 54 of the spray arm 5 to the center axis 41 of the gear rack 4, and B is a distance from the spray hole 51 to the center axis 54 of the spray arm 5. Because the rotation speed ratio of the rotation and revolution of the spray arm body 5 is 1-3, the spray arm body 5 needs to revolve three times to complete one circle of rotation, so that each spray hole 51 can complete one cycle after the spray arm body 5 revolves three times, and the corresponding whole special track line which is nearly square is completed.
Further, the phase difference angle of the two track lines is equal to 3/4 of the phase difference angle between the two spray holes 51 and the central axis 54 of the spray arm body 5. The three spray arms 53 of the spray arm body 5 are respectively provided with a first spray hole, a second spray hole and a third spray hole, and the phase difference between the spray holes 51 of the two spray arms 53 is 120 degrees, so that the phase difference of the track lines of the two spray holes is 90 degrees, and all spray holes 51 are overlapped to just form a series of concentric track lines, as shown in fig. 14.
In summary, the spray orifice 51 of the spray arm device 100 provided by the invention has a special trace line close to a square, and a plurality of spray orifices 51 form a series of concentric trace lines, so that the whole square washing area can be well covered, thereby eliminating a washing dead zone and improving the whole washing effect.
A specific embodiment of a spray arm device 100 for a dishwasher according to the present invention is described in detail below with reference to fig. 1 to 14.
Specifically, fig. 1 to 14 are views showing an embodiment of a spray arm device 100 for a dishwasher, which mainly includes: a sun gear 2 fixed at the water outlet 11 of the boom pipe 1 (e.g., the upper boom pipe), and a carrier 4 mounted on the sun gear 2, but the carrier 4 and the sun gear 2 are not fixedly connected to each other, so that the carrier 4 can freely rotate with respect to the sun gear 2. The gear frame 4 is provided with a group of two-stage transmission planetary gear mechanisms which are externally meshed with the sun gear 2, and the planetary gear 3 at the outermost end is a first planetary gear which is fixedly connected to the spray arm body 5. Further, the spray arm body 5 is provided with three spray arms 53, every two spray arms are separated by 120 degrees, each spray arm 53 is provided with a plurality of spray holes 51, the spray holes 51 form a motion track line with characteristics, and coverage spray washing of a square washing area can be realized.
In this embodiment, the first planetary gear is integrally connected with the spray arm body 5 through a spline structure, so as to realize synchronous rotation of the first planetary gear and the spray arm body. Between the first planetary gear and the sun gear 2, a transmission gear 6 is provided. The gears are engaged with each other in an external engagement manner, and the sun gear 2 is fixed, and it is known from the two-stage transmission relationship that the rotation direction and the revolution direction of the first planetary gear are opposite, that is, the rotation direction and the revolution direction of the spray arm body 5 are opposite.
In this embodiment, the ratio of the sun gear 2 to the first planetary gear is 4:3. Specifically, the sun gear 2 has 48 teeth, and the first planetary gear is 36 teeth. The number of teeth of the transmission gear 6 is 18, and it is understood that the distance between the central axis 54 of the spray arm 5 and the central axis 41 of the gear frame 4 is the revolution radius of the spray arm 5, which is 2.5 times the pitch radius of the sun gear 2, specifically 18mm×2.5=45 mm.
In the present embodiment, since the sun gear 2 is fixed, it is known that the rotation speed ratio of the first planetary gear together with the spray arm body 5 for rotation and revolution is 1 to 3, i.e., the rotation and revolution directions are opposite, and the rotation speed is one third of the revolution speed, based on the gear ratio and the meshing relationship.
Specifically, in the present embodiment, the sun gear 2 is fixed to the shower arm water pipe 1, being fixed with respect to the dishwasher. For the spray arm device 100 for the dish washer, the sun gear 2 is arranged at the water outlet 11 of the spray arm water pipe 1, the sun gear 2 is provided with a plurality of small bosses (namely second clamping bosses 23), correspondingly, the periphery of the water outlet 11 of the spray arm water pipe 1 is provided with the second clamping hooks 13, and the two are matched to realize the fixed connection of the sun gear 2 and the spray arm water pipe 1.
Specifically, the carrier 4 is mounted on the sun gear 2, and the sleeve 43 of the carrier 4 is passed through the first sleeve 22 of the sun gear 2 when mounted, and then the latch 7 is mounted, and the sun gear 2 is restrained between the latch 7 and the carrier 4. The center of the clamping block 7 is provided with a water passing hole 71, and at this time, the water outlet 11 of the spray arm water pipe 1 flows out of the washing water, and passes through the water passing hole 71 on the clamping block 7 and is led to the inner cavity (namely, the water flow channel 45) of the gear frame 4. The other end of the gear rack 4 is provided with a water outflow port 44, and the water outflow port 44 opens into the spray arm body 5.
Specifically, the carrier 4 serves as a carrier for all the planetary gears (e.g., the first planetary gear and the transmission gear 6), and the carrier 4 revolves around a central shaft (central shaft 41 of the carrier 4) together with all the planetary gears as the planetary gears rotate. Further, the first planetary gear is located above the gear frame 4, and the spray arm body 5 is located below the gear frame 4. The center post 52 of the spray arm body 5 is installed through the position (e.g., through hole) of the water outflow port 44 of the gear frame 4, and the end portion (e.g., upper end of the center post 52) of the center post 52 is provided with a connecting shaft 521 such as a spline structure. Correspondingly, the first planetary gear has a shaft hole 31, such as a splined hole, at the center thereof. After the first planetary gear is sleeved into the central column 52, a screw is screwed, so that the first planetary gear and the spray arm body 5 can be fixedly connected, and the spray arm body 5 can freely rotate relative to the gear frame 4.
Specifically, the spray arm body 5 is provided with an inner cavity, a water inlet 55 is arranged in the middle position, and the water inlet 55 is communicated with the water outlet 44 of the gear frame 4 during installation. The spray arm body 5 is provided with three spray arms 53, every two spray arms are separated by 120 degrees, and each spray arm 53 is provided with four spray holes 51 which mainly face upwards.
Specifically, the trajectory lines formed by the movement of the nozzle holes 51 are all special curves approaching to a square, and satisfy the following parameter equations:
x=a+b (ang/3), y=a (ang) -B (ang/3), wherein ang is the angle through which the carrier 4 rotates, i.e., the revolution angle. A is a distance from the center axis 54 of the spray arm 5 to the center axis 41 of the gear rack 4, and B is a distance from the spray hole 51 to the center axis 54 of the spray arm 5. Because the rotation speed ratio of the rotation and revolution of the spray arm body 5 is 1-3, the spray arm body 5 needs to revolve three times to complete one circle of rotation, so that each spray hole 51 can complete one cycle after the spray arm body 5 revolves three times, and the corresponding whole special track line which is nearly square is completed.
Further, the phase difference angle of the two track lines is equal to 3/4 of the phase difference angle between the two spray holes 51 and the central axis 54 of the spray arm body 5. The three spray arms 53 of the spray arm body 5 are respectively provided with a first spray hole, a second spray hole and a third spray hole, and the phase difference between the spray holes 51 of the two spray arms 53 is 120 degrees, so that the phase difference of the track lines of the two spray holes is 90 degrees, and all spray holes are overlapped to just form a series of concentric track lines, as shown in fig. 14.
In summary, the spray orifice 51 of the spray arm device 100 provided by the invention has a special trace line close to a square, and a plurality of spray orifices 51 form a series of concentric trace lines, so that the whole square washing area can be well covered, thereby eliminating a washing dead zone and improving the whole washing effect.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (7)

1. A spray arm assembly for a dishwasher, comprising:
a spray arm water pipe;
the central gear is arranged at the water outlet of the spray arm water pipe, and the relative positions of the central gear and the spray arm water pipe are fixed;
the planetary gear is in transmission connection with the central gear;
the sun gear and the planet gears are rotatably arranged on the gear carrier;
the spray arm body is fixedly connected with the planetary gear relatively, and a spray hole communicated with the spray arm water pipe is formed in the spray arm body;
the transmission gear is rotatably arranged on the gear frame and is respectively in external engagement with the sun gear and the planetary gears; the gear frame is provided with a transmission shaft extending upwards, the transmission gear is provided with a hole extending along the direction parallel to the central axis of the gear frame, and the transmission gear is matched with the gear frame shaft hole;
the spray arm body is provided with a central column extending upwards, the upper end of the central column is provided with a connecting shaft, the planetary gear is provided with a shaft hole matched with the connecting shaft, the connecting shaft is inserted into the shaft hole, and the connecting shaft is in spline connection with the shaft hole;
the spray arm device comprises a clamping block, wherein the clamping block is rotatably connected with the central gear, the clamping block is connected with the gear rack, and the relative position of the clamping block and the gear rack is fixed;
the sun gear includes:
the gear ring is clamped with the spray arm water pipe;
a first sleeve connected to and located within the gear ring and coaxial with and spaced apart from the gear ring,
the clamping block is rotatably connected with the first shaft sleeve, one end of the clamping block penetrates through the first shaft sleeve to be connected with the gear rack in a clamping mode, and a water passing hole which is communicated with the spray arm water pipe and the gear rack is formed in the clamping block.
2. The spray arm device for a dishwasher of claim 1, wherein the ratio of the number of teeth of the sun gear and the planetary gear is 4:3.
3. Spray arm device for a dishwasher according to any of claims 1-2, characterized in that the distance from the central axis of the spray arm body to the central axis of the gear rack is in the range of 30mm to 75 mm.
4. The spray arm device for a dishwasher according to claim 1, wherein a second sleeve is provided at a water outlet of the spray arm water pipe, the second sleeve is inserted between the gear ring and the first sleeve, the second sleeve is engaged with the gear ring, a limit flange is provided at the other end of the fixture block, and the limit flange is rotatably provided between an end surface of the first sleeve and an inner surface of the spray arm water pipe.
5. The spray arm device for a dishwasher according to claim 1, wherein the spray arm body includes a plurality of spray arms spaced around a rotation center axis of the spray arm body, each of the spray arms having the spray holes formed thereon.
6. The spray arm device for a dishwasher of claim 1, wherein the sun gear cooperates with the planetary gear for fitting the trajectory formed by the spray orifices to the parameter equation: x=a+b (ang/3), y=a (ang) -B (ang/3), wherein ang is the angle through which the gear rack rotates, a is the distance from the central axis of the spray arm body to the central axis of the gear rack, and B is the distance from the spray orifice to the central axis of the spray arm body.
7. A dishwasher, comprising:
a dishwasher body in which a washing chamber is formed;
spray arm device provided in the washing chamber, the spray arm device being according to any one of claims 1-6 for a dishwasher.
CN201611146252.0A 2016-12-13 2016-12-13 Spray arm device for dish washing machine and dish washing machine with same Active CN107028573B (en)

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CN108354560A (en) * 2018-02-07 2018-08-03 宁波美高厨具有限公司 A kind of kitchen basin dish-washing machine
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CN109622479B (en) * 2019-02-14 2024-01-19 北斗星智能电器有限公司 Spray set and cleaning machine
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