Spray arm structure for cleaning machine and cleaning machine

Abstract

The present invention relates to a spray arm structure for a cleaning machine and a cleaning machine, wherein the spray arm structure comprises a first spray arm, wherein the first spray arm is hollow inside, one end of which is closed and the other end is open, and a spray hole in fluid communication with the inside of the first spray arm is provided on the first spray arm; a joint, which is hollow inside and tubular, comprises a fixed seat, which is vertically arranged; a movable seat, which is fixedly connected to the first spray arm in the axial direction of the first spray arm, and the movable seat is in fluid communication with the open end of the first spray arm, and the movable seat is rotatably connected to the fixed seat through a pin shaft, and the pin shaft extends along the width direction of the movable seat, so that the center line of the fixed seat and the center line of the movable seat are coincident or perpendicular. When not in use, the first spray arm can be rotated to a position where it does not occupy the space of other components.

Description

Technical Field

[0001] The invention relates to the technical field of dishwashers, and in particular to a spray arm structure for a washing machine and the washing machine. Background Art

[0002] In people's daily life, washing dishes such as bowls, plates, and basins has become an indispensable thing in life. In order to reduce people's housework and tedious labor, humans have developed various tableware washing machines, among which the most important one is the spray dishwasher, and the water spray device is the most important component of the spray dishwasher. The water spray device of the spray dishwasher currently available on the market is a rotary arm water spray device, which is composed of an electric pump, a flat horizontal arm water sprayer, a water pipe shaft with a drain hole, a water sprayer top cap, a sealing gasket and a movable shaft sleeve. A flat horizontal arm water sprayer with water spray holes inclined in different directions is provided, which is installed on the water pipe shaft with a drain hole. The torque generated by the reaction force of the sprayed water flow during operation drives the horizontal arm water sprayer to rotate rapidly around the water pipe shaft, thereby spraying a three-dimensional rotating jet to the tableware. However, the three-dimensional jet directions provided by the water spray device are all in the vertical or oblique vertical direction. Since tableware has various shapes, the vertical jet can only spray directly onto the tableware surface in the vertical direction, while the tableware surface in the left and right horizontal direction, especially the deep horizontal tableware surface, is difficult to be fully sprayed by the vertical jet water. The tableware surface that cannot be sprayed will inevitably have the problem of not being clean.

[0003] In view of the above problems, the Chinese utility model patent with patent number CN200920171918.7 (publication number CN201393992Y) discloses a novel water spray device for dishwasher, which includes an inverted T-shaped water pipe with a water spray hole, wherein a hollow water pipe shaft is arranged in the vertical pipe, and the upper and lower side walls of the hollow water pipe shaft are respectively provided with water drain holes; one end of the hollow water pipe shaft extends out of the vertical pipe, and a sealing cap is arranged on the extended end of the vertical pipe; the other end of the hollow water pipe shaft extends out of the horizontal pipe, and the extended end of the horizontal pipe is connected to the water inlet pipe, and the other end of the water inlet pipe is connected to the water pump and the motor. This patent can not only provide a rotating jet in the vertical direction, but also provide a rotating jet in the horizontal direction, and realize a combined rotating jet in the vertical direction and the horizontal direction, so that the tableware surfaces in the vertical direction and the horizontal direction in the dishwasher can be directly sprayed and cleaned, thereby helping to improve the cleanliness of tableware cleaning.

[0004] However, the lengths of the horizontal and vertical pipes of the T-shaped water pipe of the patent are fixed and cannot be adjusted, and the spraying range cannot be adjusted either, so further improvement is needed; and the T-shaped water pipe takes up more space both horizontally and vertically, resulting in a large occupied space.

[0005] In addition, after the dishwasher is finished washing, there is a lot of residual water in the inner tank and on the dishes, and this residual water is dried by the residual heat of the inner tank and the dishes. However, due to the large amount of residual water in the inner tank and the rapid cooling of the inner tank, the residual heat of the inner tank is not enough to evaporate the residual water, so that there is still a lot of water in the inner tank for a long time after washing the dishes. When the dishwasher door is closed for a long time, the odor in the dishwasher will be heavier and it is easy to breed bacteria, so it is necessary to set a drying structure on the dishwasher. For example, the Chinese utility model patent with patent number CN202120070986.5 (publication number CN215838910U) discloses a "Drying Device for a Dishwasher", which includes a drying fan assembly arranged on the inner tank body and an exhaust assembly arranged on the inner tank body. The drying fan assembly heats the external air and sends it into the inner tank body to dry the inner tank body, and then discharges it through the exhaust assembly.

[0006] The drying fan assembly is arranged on the outer wall of the inner tank, and enters the inner tank through the air inlet on the inner tank to dry the washing cavity and tableware. The airflow entering the washing cavity may be blocked by tableware, etc., resulting in poor airflow convection effect, affecting the drying effect, and the fan will cause noise and increase costs. Summary of the invention

[0007] The first technical problem to be solved by the present invention is to provide a foldable spray arm structure for a cleaning machine in view of the current status of the prior art.

[0008] The second technical problem to be solved by the present invention is to provide a spray arm structure for a cleaning machine with an adjustable spray range in view of the current status of the prior art.

[0009] The third technical problem to be solved by the present invention is to provide a spray arm structure for a cleaning machine capable of multi-directional spraying in view of the current status of the prior art.

[0010] The fourth technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned spray arm structure in view of the current status of the prior art.

[0011] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a spray arm structure for a cleaning machine, characterized in that: it includes:

[0012] a first spray arm, wherein the first spray arm is hollow inside, one end of which is closed and the other end is open, and the first spray arm is provided with a spray hole in fluid communication with the interior thereof;

[0013] It is characterized by: it also includes

[0014] A fitting, hollow and tubular inside, comprising

[0015] Fixed seat, vertical setting;

[0016] The movable seat is fixedly connected to the first spray arm in the axial direction of the first spray arm, and the movable seat is fluidically connected to the open end of the first spray arm. The movable seat is rotatably connected to the fixed seat through a pin shaft, and the pin shaft extends along the width direction of the movable seat, so that the center line of the fixed seat and the center line of the movable seat coincide with or are perpendicular.

[0017] The movable seat can be rotated manually, but this is troublesome, so for convenience, the spray arm structure also includes a driving mechanism, and the driving mechanism is connected to the pin shaft or the first spray arm driving.

[0018] The driving mechanism can have a variety of structural forms, such as a motor and a push rod connected to the motor drive, the push rod drives the movable seat to rotate, preferably, the pin is arranged on the outer wall surface of the movable seat and is rotatably mounted on the fixed seat, the driving mechanism is connected to the pin drive, the driving mechanism includes a motor, a first gear connected to the output end of the motor drive, and a second gear mounted on the end of the pin, the first gear and the second gear are directly meshed or indirectly meshed through an intermediate gear, and the second gear is coaxial with the pin. This structural form of the driving mechanism is compact and occupies little space.

[0019] The technical solution adopted by the present invention to solve the above second technical problem is: the first spray arm includes at least two arm bodies arranged in sequence along the axial direction, the two adjacent arm bodies are plug-fitted and matched, and the two adjacent arm bodies can produce relative displacement in the axial direction, each arm body is hollow inside, the internal parts of the two adjacent arm bodies are fluidically connected, and each arm body is provided with a spray hole that is fluidically connected to the internal part thereof;

[0020] One of the arms located at the end is fixedly connected to the movable seat in the axial direction and the two are in fluid communication, and the first spray arm as a whole can rotate relative to the joint around the axis of the first spray arm.

[0021] In order to make the movable seat connected with the corresponding arm body in rotation and fixed in the axial direction, the structure is simple. A circle of embedding grooves is provided on the outer peripheral wall of the movable seat, and a convex rib is provided on the inner peripheral wall of the arm body. The convex rib is embedded in the embedding groove and can rotate around the embedding groove. The convex rib cooperates with the embedding groove, which not only prevents the movable seat and the arm body from being separated in the axial direction, but also guides and limits the circumferential rotation trajectory of the two.

[0022] In order to guide the axial movement trajectory of the arm body, one of the two adjacent arm bodies is provided with a guide column connected to it, and the guide column extends along the axial direction of the arm body. The guide column is provided with a guide groove extending along its axial direction, and the other arm body is provided with a guide rod, and the guide rod can be axially movably inserted in the guide groove.

[0023] In the above scheme, the arm body has two parts, namely, the first arm body and the second arm body, both ends of the first arm body are open, one end of the second arm body is closed and the other end is open, one end of the first arm body is sleeved on the open end of the second arm body, the other end of the first arm body is connected to the movable seat, the second arm body can move axially relative to the first arm body, the guide column is arranged in the first arm body, the guide rod is arranged in the second arm body, and the spray arm structure includes an electric air pump connected to the guide groove so as to drive the guide rod to move. The cooperation of the guide rod and the guide column is not only convenient for guiding the movement of the second arm body, but also can cooperate with the electric air pump to drive the second arm body to move.

[0024] In order to further guide the moving trajectory of the second arm, a strip groove extending along its axial direction is provided on the inner peripheral wall of the first arm, and a protrusion capable of moving along the strip groove is provided at a position adjacent to the end of the second arm.

[0025] The technical solution adopted by the present invention to solve the above-mentioned third technical problem is: the spray arm structure also includes a second spray arm connected to the first spray arm, the extension direction of the second spray arm is perpendicular to the extension direction of the first spray arm, the interior of the second spray arm is hollow, and the second spray arm is open at one end facing the first spray arm. The first spray arm is provided with a water outlet corresponding to the open end of the second spray arm, and the second spray arm is provided with a nozzle connected to the fluid inside thereof, and the second spray arm can rotate around the axis of the first spray arm under the action of water flow.

[0026] In order to further reduce the space occupied by the spray arm structure, the second spray arm is rotatably connected to the first spray arm via a rotating shaft, the rotating shaft extends along the width direction of the first spray arm, and the second spray arm can be rotated to a state where its extension direction is perpendicular or parallel to the first spray arm. In this way, when the spray arm structure sprays fluid, the extension direction of the second spray arm is perpendicular to the extension direction of the first spray arm, and multi-directional spraying can be performed; when the spray arm structure is not working, the extension direction of the second spray arm is parallel to the extension direction of the first spray arm, reducing the space occupied by the spray arm structure.

[0027] In order to drive the second spray arm to rotate, the arm body has two parts, namely the first arm body and the second arm body. The first arm body has two open ends, the second arm body has one closed end and one open end, one end of the first arm body is sleeved on the open end of the second arm body, the other end of the first arm body is connected to the movable seat, and the second arm body can move axially relative to the first arm body; the rotating shaft is fixedly connected to the second spray arm, and the rotating shaft is rotatably mounted on the first arm body, the outer peripheral wall of the second arm body is provided with a strip plate extending along its axial direction, the strip plate is provided with a driving member, the second spray arm is provided with a driven assembly, the driving member is connected to the driven assembly, so that the second spray arm can rotate around the rotating shaft. In this way, the movement of the second spray arm is used as a power source, and there is no need to set up a power source separately, the structure is simple, and the design is ingenious.

[0028] The first matching form of the driving member and the driven assembly is: the driving member is a toothed portion provided on the strip plate, the toothed portion has a plurality of teeth and is sequentially arranged along the length direction of the strip plate, the driven assembly includes a third gear provided at the end of the rotating shaft, the toothed portion can be indirectly meshed with the third gear through the fourth gear. This matching structure of the driving member and the driven assembly is compact.

[0029] The second form of cooperation between the driving member and the driven component is: the driven component includes a connecting rod and a slide groove arranged on the first arm body, the slide groove is inclined in the direction away from the second arm body and in the direction away from the second spray arm, the first end of the connecting rod is rotatably connected to the side wall of the second spray arm, the second end of the connecting rod is provided with an insert block, and the insert block is slidably inserted in the slide groove, the driving part is a baffle, the extension direction of the baffle is perpendicular to the extension direction of the strip plate, and the insert block is located on the moving path of the baffle and can resist the baffle.

[0030] In order to ensure the smooth rotation of the first spray arm, the second spray arms are provided in two pieces, symmetrically arranged on both sides of the first spray arm, and correspondingly, the driving member and the driven assembly are provided in two sets, and the two sets of driving members are respectively arranged on both sides of the rack. In this way, the forces on both sides of the first spray arm are balanced, and the two second spray arms have a larger spray range than one second spray arm.

[0031] In order to prevent the two first spray arms from deflecting at the same time, which may easily interfere with the bowl rack, the two groups of driving components are arranged at intervals in the length direction of the strip plate.

[0032] In order to prevent the strip plate from interfering with the first arm body and affecting the movement of the second arm body when the second arm body moves axially, a mounting plate is provided at the bottom of the outer peripheral wall of the second arm body, the bottom of the strip plate is mounted on the mounting plate, there is a gap between the strip plate and the second arm body, and a strip groove is provided on the outer peripheral wall of the first arm body, the strip plate is embedded in the strip groove and can slide along the strip groove. The strip groove plays a role of avoidance, and the strip plate slides along the strip groove during the movement of the second arm body.

[0033] In order to enable the second spray arm to rotate around the axis of the first spray arm under the action of water flow, the spray port is provided on the front wall or rear wall of the second spray arm, and the spray port is also provided on the upper wall and / or lower wall of the second spray arm.

[0034] The technical solution adopted by the present invention to solve the fourth technical problem is: a cleaning machine using the above-mentioned spray arm structure, characterized in that it also includes

[0035] A box body has a washing cavity inside, and a through hole connected to the washing cavity is opened on the top wall of the box body, and the fixing seat is inserted into the through hole;

[0036] A dish rack is arranged in the washing chamber, the first spray arm vertically passes through the dish rack and can rotate relative to the dish rack, in which state, the second spray arm is located below the dish rack;

[0037] The pipe body is used to transport water or hot air flow. The pipe body is arranged on the top wall of the box body and is located outside the box body. The pipe body is fluidically connected with the fixing seat.

[0038] Compared with the prior art, the advantages of the present invention are as follows: 1. The present invention divides the joint into a fixed seat and a movable seat, and the fixed seat and the movable seat are rotatably connected. Since the first spray arm is fixedly connected to the movable seat in the axial direction, it is equivalent to that the first spray arm can rotate relative to the fixed seat. In this way, when not in use, the first spray arm can be rotated to a position that does not occupy the space of other components; when the spray arm structure of the present invention is applied to a washing machine, when not in use, the first spray arm can be rotated to a horizontal state and located above or below the dish rack, without occupying too much space in the washing chamber of the washing machine. When in use, the first spray arm is rotated to a vertical state to spray water or hot air to wash or dry the tableware; 2. The present invention The first spray arm includes at least two arm bodies that are plugged in and matched, that is, the first spray arm can be extended and retracted, so that the length of the first spray arm can be adjusted. When not in use, the first spray arm can be retracted, further reducing the space occupied by the spray arm structure; when the first spray arm is washing, the first spray arm can be extended to have a large spray range; in addition, by adjusting the length of the first spray arm, the spray range of the first spray arm can be adjusted to reduce the cleaning dead angle; 3. The present invention is also provided with a second spray arm, and the second spray arm has the following functions: a. drives the first spray arm to rotate, increasing the coverage range of the fluid sprayed by the first spray arm; b. when working, the first spray arm extends vertically and the second spray arm extends horizontally, and the two cooperate to spray in multiple directions, and the spray effect is good;

[0039] The spray arm structure of the present invention is not only suitable for spraying water to wash tableware with good washing effect, but also suitable for spraying hot air flow to dry tableware with good drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention (the spray arm structure is in working state);

[0041] Figure 2 for Figure 1 A cross-sectional view of

[0042] Figure 3 for Figure 1 A schematic diagram of the structure without the box body;

[0043] Figure 4 for Figure 3 A schematic diagram of the structure without the bowl rack;

[0044] Figure 5 for Figure 4 Schematic diagram of the local structure;

[0045] Figure 6 for Figure 4 A cross-sectional view of

[0046] Figure 7 for Figure 6 A magnified image of point A;

[0047] Figure 8 for Figure 6 The enlarged view of point B;

[0048] Fig. 9 for Figure 4 A cross-sectional view in another direction;

[0049] Fig.10 for Figure 4 A schematic structural diagram of one of the second spray arms;

[0050] Fig.11 This is a structural schematic diagram of Example 1 of the present invention (the spray arm structure is in a non-working state);

[0051] Fig.12 for Fig.11 Schematic diagram of the spray arm structure and the pipe body structure;

[0052] Fig.13 This is a schematic diagram of the structure of Example 2 of the present invention without the box body (the spray arm structure is in working state);

[0053] Fig.14 for Fig.13 A schematic diagram of the local structure of the spray arm structure;

[0054] Fig.15 This is one of the states of the spray arm structure of Example 2 of the present invention;

[0055] Fig.16 This is another state of the spray arm structure of Example 2 of the present invention;

[0056] Fig.17 This is another state of the spray arm structure of Example 2 of the present invention;

[0057] Fig.18 This is the non-working state of the spray arm structure of Example 2 of the present invention. DETAILED DESCRIPTION

[0058] The present invention is further described in detail below with reference to the accompanying drawings.

[0059] Example 1

[0060] like Figures 1 to 12As shown, the cleaning machine of this preferred embodiment includes a box body 5, a bowl rack 6, a pipe body 7 and a spray arm structure A.

[0061] like Figures 4 to 10 As shown, the spray arm structure A includes a first spray arm 1, a joint 3 and a second spray arm 2, etc.

[0062] The first spray arm 1 is hollow inside, with one end closed and the other end open. The first spray arm 1 is provided with a spray hole 10 in fluid communication with the inside thereof. In this embodiment, the first spray arm 1 can be extended and retracted in its axial direction, which is specifically achieved in the following manner:

[0063] The first spray arm 1 includes at least two arm bodies arranged in sequence along the axial direction, the two adjacent arm bodies are inserted and matched, and the two adjacent arm bodies can produce relative displacement in the axial direction, each arm body is hollow inside, the internal phases of the two adjacent arm bodies are fluidly connected, and each arm body is provided with a spray hole 10 in fluid communication with the internal phases. Among the two adjacent arm bodies, one of the arm bodies is provided with a guide column 111 connected thereto, the guide column 111 extends along the axial direction of the arm body, and the guide column 111 is provided with a guide groove 1111 extending along the axial direction thereof, and the other arm body is provided with a guide rod 121, and the guide rod 121 can be inserted in the guide groove 1111 so as to be axially movable.

[0064] like Figures 6 to 9 As shown, in this embodiment, there are two arms, namely a first arm 11 and a second arm 12 . In the use state, the first arm 11 is located above the second arm 12 .

[0065] The first arm body 11 is open at both ends, the second arm body 12 is closed at one end and open at the other end, one end of the first arm body 11 is sleeved on the open end of the second arm body 12, the second arm body 12 can move axially relative to the first arm body 11, the guide column 111 is arranged in the first arm body 11, the guide rod 121 is arranged in the second arm body 12, and the spray arm structure includes an electric air pump 13 connected to the guide groove 1111 so as to drive the guide rod 121 to move. In this embodiment, the electric air pump 13 is fluidly connected to the guide groove 1111 through the air intake channel, and the electric air pump 13 adopts the existing structure, which will not be repeated here.

[0066] In addition, a strip groove 112 extending along the axial direction is provided on the inner peripheral wall of the first arm body 11 , and a protrusion 122 movable along the strip groove 112 is provided near the end of the second arm body 12 to guide the axial movement trajectory of the second arm body 12 .

[0067] like Figure 4 , 5As shown in FIGS. 9 and 10 , the second spray arm 2 is connected to the first spray arm 1 , and the extension direction of the second spray arm 2 is perpendicular to the extension direction of the first spray arm 1 , that is, in use, the first spray arm 1 is vertically arranged, and the second spray arm 2 is horizontally arranged.

[0068] The interior of the second spray arm 2 is hollow, and one end of the second spray arm 2 facing the first spray arm 1 is open. The first spray arm 1 is provided with a water outlet 14 corresponding to the open end of the second spray arm 2, and the second spray arm 2 is provided with a nozzle 20 in fluid communication with the interior thereof, so that the second spray arm 2 can rotate around the axis of the first spray arm 1 under the action of the water flow. In this embodiment, the nozzle 20 is provided on the front wall or the rear wall of the second spray arm 2, and the nozzle 20 is also provided on the upper wall and / or the lower wall of the second spray arm 2, so that the second spray arm 2 can rotate under the drive of the water flow. Of course, the nozzle 20 may not be of the design form of this embodiment, as long as it can drive the second spray arm 2 to drive the first spray arm 1 to rotate. A driving mechanism that drives the first spray arm 1 to rotate around its axis may also be provided, so that the first spray arm 1 drives the second spray arm 2 to rotate.

[0069] The second spray arm 2 is rotatably connected to the first spray arm 1 via a rotating shaft 21, the rotating shaft 21 is fixedly connected to the second spray arm 2, the rotating shaft 21 extends along the width direction of the first spray arm 1, and the rotating shaft 21 is rotatably mounted on the first arm body 11. A strip plate 123 extending along its axial direction is provided on the outer peripheral wall of the second arm body 12, a driving member is provided on the strip plate 123, a driven assembly is provided on the second spray arm 2, and the driving member is drivingly connected to the driven assembly, so that the second spray arm 2 can rotate around the rotating shaft 21 until its extension direction is perpendicular or parallel to the first spray arm 1.

[0070] In this embodiment, the driving member is a toothed portion 1231 disposed on the strip plate 123, and there are a plurality of toothed portions 1231 disposed sequentially along the length direction of the strip plate 123. The driven assembly includes a third gear 22 disposed at the end of the rotating shaft 21, and the toothed portion 1231 can be indirectly meshed with the third gear 22 through the fourth gear 113 mounted on the first arm 11. This matching structure of the driving member and the driven assembly is compact.

[0071] The bottom of the outer peripheral wall of the second arm body 12 is provided with a mounting plate 124, the bottom of the strip plate 123 is mounted on the mounting plate 124, there is a distance between the strip plate 123 and the second arm body 12, the outer peripheral wall of the first arm body 11 is provided with an avoidance groove 114 extending along its axial direction, the strip plate 123 is embedded in the avoidance groove 114 and can slide along the avoidance groove 114. The avoidance groove 114 plays a role of avoidance, and the strip plate 123 slides along the avoidance groove 114 during the movement of the second arm body 12.

[0072] When the second arm 12 moves upward, the strip plate 123 moves synchronously. When the tooth portion 1231 is engaged with the third gear 22, the shaft 21 rotates, driving the second spray arm 2 to deflect upward until it is parallel to the first spray arm 1; otherwise, the second spray arm 2 deflects downward until it is perpendicular to the first spray arm 1.

[0073] In this embodiment, there are two second spray arms 2, which are symmetrically arranged on both sides of the first spray arm 1. Correspondingly, there are two groups of driving members and driven components, and the two groups of driving members are respectively arranged on both sides of the rack. In this way, the forces on both sides of the first spray arm 1 are balanced, and the two second spray arms 2 have a larger spray range than one second spray arm 2. The two groups of driving members are arranged at intervals in the length direction of the strip plate 123, so that the two second spray arms 2 will not deflect at the same time. Combined with the deflection of the first spray arm 1 relative to the joint 3 described below, the bowl rack 6 can be avoided; of course, an avoidance area 61 can also be set on the bowl rack 6 to avoid the rotation of the second spray arm 2.

[0074] When the spray arm structure sprays fluid, the extension direction of the second spray arm 2 is perpendicular to the extension direction of the first spray arm 1, so that multi-directional spraying can be performed; when the spray arm structure is not working, the extension direction of the second spray arm 2 is parallel to the extension direction of the first spray arm 1, reducing the space occupied by the spray arm structure.

[0075] like Figure 4 , 7 As shown, the connector 3 is hollow inside and tubular, and includes a fixed seat 31 and a movable seat 32. The fixed seat 31 is vertically arranged, and the movable seat 32 is fixedly connected to the first arm body 11 in the axial direction of the first arm body 11. The movable seat 32 is in fluid communication with the first arm body 11, and the first spray arm 1 as a whole can rotate around the axis of the first spray arm 1 relative to the connector 3. In this embodiment, a circle of embedded grooves 320 is provided on the outer peripheral wall of the movable seat 32, and a convex rib 115 is provided on the inner peripheral wall of the first arm body 11. The convex rib 115 is embedded in the embedded groove 320 and can rotate around the embedded groove 320.

[0076] The movable seat 32 is rotatably connected to the fixed seat 31 through a pin shaft 321, and the driving mechanism 4 is rotatably connected to the pin shaft 321. The pin shaft 321 extends along the width direction of the movable seat 32. The pin shaft 321 is arranged on the outer wall surface of the movable seat 32 and rotatably mounted on the fixed seat 31. The driving mechanism 4 includes a motor 41, a first gear 42 drivingly connected to the output end of the motor 41, and a second gear 43 mounted on the end of the pin shaft 321. The first gear 42 and the second gear 43 are directly meshed or indirectly meshed through an intermediate gear, and the second gear 43 is coaxial with the pin shaft 321. When the motor 41 works, it drives the first gear 42 to rotate, and then drives the second gear 43 to rotate, and the pin shaft 321 rotates synchronously, so that the movable seat 32 rotates around the axis of the pin shaft 321, so that the center line of the fixed seat 31 and the center line of the movable seat 32 coincide or are perpendicular.

[0077] like Figures 1 to 3 As shown, the box body 5 has a washing chamber 51 inside, and a through hole 52 connected to the washing chamber 51 is opened on the top wall of the box body 5, and the fixing seat 31 is inserted into the through hole 52. The pipe body 7 is used to transport water or hot air flow. The pipe body 7 is arranged on the top wall of the box body 5 and located outside the box body 5. The pipe body 7 is in fluid communication with the fixing seat 31.

[0078] The dish rack 6 is arranged in the washing chamber 51, and the first spray arm 1 vertically passes through the dish rack 6 and can rotate relative to the dish rack 6. In this state, the second spray arm 2 is located below the dish rack 6, and an avoidance area 61 is arranged on the dish rack 6 to avoid the second spray arm 2 from rotating.

[0079] The working process of the cleaning machine of this embodiment is as follows:

[0080] In the non-working state, Fig.11 , 12 As shown, the second arm body 12 is retracted in the first arm body 11, the second spray arm 2 is attached to the first arm body 11, the center line of the fixed seat 31 is perpendicular to the center line of the movable seat 32, and the spray arm structure is located at the top of the box body 5 as a whole;

[0081] When work is needed:

[0082] First, the movable seat 32 is rotated to an angle of about 45 degrees between its center line and the center line of the fixed seat 31, and then the second arm body 12 is axially moved downward for a certain distance. At this time, the second spray arm 2 on the left side is located in the avoidance area of ​​the bowl rack 6, so that the second spray arm 2 on the left side is deflected downward to be perpendicular to the first spray arm 1 (refer to the embodiment 2). Fig.15 status);

[0083] Then the movable seat 32 rotates until its center line is perpendicular to the center line of the fixed seat 31 (see Example 2). Fig.16 status);

[0084] Then the second arm body 12 moves downward and completely extends out of the first arm body 11. During the downward movement of the second arm body 12, the second spray arm 2 on the right is synchronously deflected downward (refer to the embodiment 2). Fig.17 When the second arm body 12 moves down to the limit position, the second spray arm 2 is perpendicular to the first spray arm 1. Figure 3 In the state shown, water or hot air flow can be introduced into the tube body 7 to wash or dry the dishes.

[0085] After the work is completed, the storage process of the spray arm structure is carried out in the reverse direction.

[0086] Example 2

[0087] like Figures 13 to 18As shown, the difference between Example 2 and Example 1 is that the structures of the driving component and the driven component are different. For other details, please refer to Example 1.

[0088] The driven assembly includes a connecting rod 125 and a slide groove 116 provided on the first arm body 11. The slide groove 116 is inclined in a direction away from the second arm body 12 and in a direction away from the second spray arm 2. The first end of the connecting rod 125 is rotatably connected to the side wall of the second spray arm 2. The second end of the connecting rod 125 is provided with an insert block 1251, which is slidably inserted in the slide groove 116. The driving part is a baffle 1232. The extension direction of the baffle 1232 is perpendicular to the extension direction of the strip plate 123. The insert block 1251 is located on the moving path of the baffle 1232 and can resist the baffle 1232.

[0089] The strip plate 123 is also provided with a groove 1233 extending along its axial direction, and the groove 1233 is connected to the end of the blocking bar 1232; when the insert block 1251 is in a state of abutting against the upper end of the slide groove 116, the insert block 1251 slides into the groove 1233 and relative sliding can occur between the two, which will not affect the upward movement of the second arm body 12.

[0090] During the axial movement of the second arm body 12 , the blocking bar 1232 drives the inserting block 1251 to move along the sliding groove 116 , thereby achieving the deflection of the second spray arm 2 .

[0091] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0092] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A spray arm structure for a cleaning machine, characterized in that: include A first spray arm (1), the first spray arm (1) is hollow inside, one end of which is closed and the other end is open, and the first spray arm (1) is provided with a spray hole (10) in fluid communication with the interior thereof; It is characterized by: it also includes The connector (3) is hollow and tubular, comprising A fixing seat (31) is arranged vertically; A movable seat (32) is fixedly connected to the first spray arm (1) in the axial direction of the first spray arm (1), the movable seat (32) is in fluid communication with the open end of the first spray arm (1), the movable seat (32) is rotatably connected to the fixed seat (31) via a pin shaft (321), and the pin shaft (321) extends along the width direction of the movable seat (32), so that the center line of the fixed seat (31) and the center line of the movable seat (32) are coincident or perpendicular to each other; The first spray arm (1) comprises at least two arm bodies arranged in sequence along the axial direction, the two adjacent arm bodies are plug-fitted and matched, and the two adjacent arm bodies can produce relative displacement in the axial direction, each arm body is hollow inside, the internal parts of the two adjacent arm bodies are fluidically connected, and each arm body is provided with a spray hole (10) that is fluidically connected to its interior; One of the arms located at the end is fixedly connected to the movable seat (32) in the axial direction and the two are in fluid communication, and the first spray arm (1) as a whole can rotate relative to the joint (3) around the axis of the first spray arm (1); The spray arm structure also includes a second spray arm (2) connected to the first spray arm (1); the extension direction of the second spray arm (2) is perpendicular to the extension direction of the first spray arm (1); the interior of the second spray arm (2) is hollow; one end of the second spray arm (2) facing the first spray arm (1) is open; the first spray arm (1) is provided with a water outlet (14) corresponding to the open end of the second spray arm (2); the second spray arm (2) is provided with a nozzle (20) in fluid communication with the interior thereof; and the second spray arm (2) can rotate around the axis of the first spray arm (1) under the action of water flow.

2. The spray arm structure according to claim 1, characterized in that: The spray arm structure further comprises a driving mechanism (4), wherein the driving mechanism (4) is drivingly connected to the pin shaft (321) or the first spray arm (1).

3. The spray arm structure according to claim 2, characterized in that: The pin shaft (321) is arranged on the outer wall surface of the movable seat (32) and is rotatably mounted on the fixed seat (31); the driving mechanism (4) is drivingly connected to the pin shaft (321); the driving mechanism (4) comprises a motor (41), a first gear (42) drivingly connected to the output end of the motor (41), and a second gear (43) mounted on the end of the pin shaft (321); the first gear (42) and the second gear (43) are directly meshed or indirectly meshed through an intermediate gear; and the second gear (43) is coaxial with the pin shaft (321).

4. The spray arm structure according to claim 1, characterized in that: The outer peripheral wall of the movable seat (32) is provided with a circle of embedding grooves (320), and the inner peripheral wall of the arm body is provided with convex ribs (115). The convex ribs (115) are embedded in the embedding grooves (320) and can rotate around the embedding grooves (320).

5. The spray arm structure according to claim 1, characterized in that: Of the two adjacent arm bodies, one of the arm bodies is provided with a guide column (111) connected thereto, the guide column (111) extending along the axial direction of the arm body, the guide column (111) is provided with a guide groove (1111) extending along the axial direction thereof, and the other arm body is provided with a guide rod (121), the guide rod (121) being inserted into the guide groove (1111) in an axially movable manner.

6. The spray arm structure according to claim 5, characterized in that: The arm body comprises two arms, namely a first arm body (11) and a second arm body (12); both ends of the first arm body (11) are open, and one end of the second arm body (12) is closed and the other end is open; one end of the first arm body (11) is sleeved on the open end of the second arm body (12); the other end of the first arm body (11) is connected to a movable seat (32); the second arm body (12) can move axially relative to the first arm body (11); the guide column (111) is arranged in the first arm body (11); the guide rod (121) is arranged in the second arm body (12); and the spray arm structure further comprises an electric air pump (13) which is connected to the guide groove (1111) so as to drive the guide rod (121) to move.

7. The spray arm structure according to claim 6, characterized in that: The inner peripheral wall of the first arm body (11) is provided with a strip groove (112) extending along its axial direction, and the second arm body (12) is provided with a protrusion (122) movable along the strip groove (112) at a position adjacent to its end.

8. The spray arm structure according to claim 1, characterized in that: The second spray arm (2) is rotatably connected to the first spray arm (1) via a rotating shaft (21); the rotating shaft (21) extends along the width direction of the first spray arm (1); and the second spray arm (2) can be rotated to a state where its extension direction is perpendicular or parallel to the first spray arm (1).

9. The spray arm structure according to claim 8, characterized in that: The arm body comprises two arms, namely a first arm body (11) and a second arm body (12). Both ends of the first arm body (11) are open, and one end of the second arm body (12) is closed and the other end is open. One end of the first arm body (11) is sleeved on the open end of the second arm body (12), and the other end of the first arm body (11) is connected to the movable seat (32). The second arm body (12) can move axially relative to the first arm body (11). The rotating shaft (21) is fixedly connected to the second spray arm (2), and the rotating shaft (21) is rotatably mounted on the first arm body (11). A strip plate (123) extending along the axial direction thereof is provided on the outer peripheral wall of the second arm body (12), and a driving member is provided on the strip plate (123). A driven component is provided on the second spray arm (2), and the driving member is drivingly connected to the driven component, so that the second spray arm (2) can rotate around the rotating shaft (21).

10. The spray arm structure according to claim 9, characterized in that: The driving member is a toothed portion (1231) provided on the strip plate (123), and the toothed portion (1231) is provided in plurality and is arranged in sequence along the length direction of the strip plate (123). The driven component comprises a third gear (22) provided at the end of the rotating shaft (21), and the toothed portion (1231) can be indirectly meshed with the third gear (22) via a fourth gear (113) installed on the first arm body (11).

11. The spray arm structure according to claim 9, characterized in that: The driven component comprises a connecting rod (125) and a slide groove (116) provided on the first arm body (11); the slide groove (116) is inclined in a direction away from the second arm body (12) and in a direction away from the second spray arm (2); the first end of the connecting rod (125) is rotatably connected to the side wall of the second spray arm (2); the second end of the connecting rod (125) is provided with an insert block (1251); the insert block (1251) is slidably inserted in the slide groove (116); the driving part is a baffle (1232); the extension direction of the baffle (1232) is perpendicular to the extension direction of the strip plate (123); the insert block (1251) is located on the moving path of the baffle (1232).

12. The spray arm structure according to claim 11, characterized in that: The strip plate (123) is also provided with a groove (1233) extending along its axial direction, and the groove (1233) is connected to the end of the stop bar (1232); when the insert block (1251) and the upper end of the slide groove (116) are in contact with each other, the insert block (1251) slides into the groove (1233) and relative sliding can occur between the two.

13. The spray arm structure according to claim 9, characterized in that: There are two second spray arms (2), which are symmetrically arranged on both sides of the first spray arm (1). Correspondingly, there are two groups of driving components and driven components, and the two groups of driving components are respectively arranged on both sides of the rack.

14. The spray arm structure according to claim 13, characterized in that: The two groups of driving members are arranged at intervals in the length direction of the strip plate (123).

15. The spray arm structure according to claim 9, characterized in that: A mounting plate (124) is provided at the bottom of the outer peripheral wall of the second arm body (12), and the bottom of the strip plate (123) is mounted on the mounting plate (124). There is a distance between the strip plate (123) and the second arm body (12). An avoidance groove (114) extending along its axial direction is provided on the outer peripheral wall of the first arm body (11), and the strip plate (123) is embedded in the avoidance groove (114) and can slide along the avoidance groove (114).

16. The spray arm structure according to claim 1, characterized in that: The nozzle (20) is provided on the front wall or the rear wall of the second spray arm (2), and the nozzle (20) is also provided on the upper wall and / or the lower wall of the second spray arm (2).

17. A cleaning machine using the spray arm structure according to any one of claims 1 to 16, characterized in that: Also includes A box body (5) has a washing chamber (51) inside, and a through hole (52) communicating with the washing chamber (51) is provided on the top wall of the box body (5), and the fixing seat (31) is inserted into the through hole (52); A dish rack (6) is arranged in the washing chamber (51), wherein the first spray arm (1) vertically passes through the dish rack (6) and can rotate relative to the dish rack (6), and in this state, the second spray arm (2) is located below the dish rack (6); The pipe body (7) is used to transport water or hot air flow. The pipe body (7) is arranged on the top wall of the box body (5) and is located outside the box body (5). The pipe body (7) is fluidically connected to the fixing seat (31).

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