Telescopic spray arm structure for dish-washing machine

Abstract

A telescopic spray arm structure for a dish-washing machine, comprising a main spray arm (1), a fixed gear plate (2), a slidable arm (3), a planetary gear (4) and a swing arm (5). The slidable arm (3) is sleeved on one end of the main spray arm (1) and is in sliding fit with the main spray arm (1); an inner cavity of the main spray arm (1) is communicated with an inner cavity of the slidable arm (3); a plurality of first spray holes (10) are formed on the main spray arm (1); a plurality of second spray holes (30) are formed on the slidable arm (3); a hollow shaft rod (11) is formed at the center of the bottom of the main spray arm (1); the hollow shaft rod (11) penetrates through the fixed gear plate (2), and the hollow shaft rod (11) can rotate relative to the fixed gear plate (2); the planetary gear (4) is located between the fixed gear plate (2) and the slidable arm (3), and the planetary gear (4) is rotatably connected to the bottom of the main spray arm (1); the planetary gear (4) meshes with the fixed gear plate (2); one end of the swing arm (5) is rotatably connected to an eccentric position of the planetary gear (4), and the other end of the swing arm (5) is rotatably connected to the slidable arm (3); and the swing arm (5) is used for driving, when the planetary gear (4) rotates, the slidable arm (3) to slide relative to the main spray arm (1). Therefore, the cleaning efficiency can be improved, water can be saved, and the cleaning quality can be improved.

Description

Telescopic spray arm structure of dishwasher Technical Field

[0001] The invention relates to a dishwasher, and in particular to a telescopic spray arm structure of a dishwasher. Background Art

[0002] During operation, a dishwasher needs to use a spray arm to spray water onto dishes. For the relevant spray arm structure, please refer to the Chinese patent publication with publication number CN108523808A, entitled "Dishwasher Spray Arm and Dishwasher", which records:

[0003] "A dishwasher spray arm and dishwasher, wherein the dishwasher spray arm comprises a spray arm body and a decorative component, the spray arm body having a hollow inner cavity, the spray arm body having a water inlet and a water outlet communicating with the hollow inner cavity; the decorative component being provided on at least the surface of the spray arm body exposed relative to the inner container wall";

[0004] In this type of mechanism, the spray arm is an integrally straight line structure, with multiple spray holes located on either side of the center of the arm. As the arm rotates, the nozzles spray water in a circular pattern. However, this type of spray arm can only form multiple concentric circular spray paths, leaving areas between adjacent circles difficult to reach. This causes the dishwasher to take a long time to rinse dishes, inefficiently washing dishes and wasting water. Furthermore, because dishwashers typically have rectangular or cube-shaped inner tanks, existing spray arms can only spray water in a circular pattern, making it difficult to fully clean dishes in the corners of the tank, thus affecting cleaning quality.

[0005] Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a telescopic spray arm structure for a dishwasher which can improve cleaning efficiency, save water and improve cleaning quality, in view of the deficiencies in the prior art.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions.

[0008] The telescopic arm of the present invention is a kind of telescopic spray arm structure of a dishwasher, which includes a main spray arm, a fixed gear plate, a telescopic arm, a planetary gear and a swing arm, wherein the telescopic arm is sleeved on one end of the main spray arm and the two are slidably matched, the internal cavity of the main spray arm and the internal cavity of the telescopic arm are communicated with each other, the main spray arm is provided with a plurality of first spray holes, the telescopic arm is provided with a plurality of second spray holes, a hollow shaft is formed at the bottom center of the main spray arm, the hollow shaft passes through the fixed gear plate, and the hollow shaft can rotate relative to the fixed gear plate, the planetary gear is located between the fixed gear plate and the telescopic arm, and the planetary gear is rotatably connected to the bottom of the main spray arm, the planetary gear and the fixed gear plate are meshed with each other, one end of the swing arm is rotatably connected to the eccentric position of the planetary gear, and the other end of the swing arm is rotatably connected to the telescopic arm, and the swing arm is used to drive the telescopic arm to telescopic movement relative to the main spray arm when the planetary gear rotates.

[0009] Preferably, the hollow shaft is communicated with the inner cavity of the main spray arm.

[0010] Preferably, a cylindrical seat is formed at the bottom of the fixed gear disc, and the hollow shaft passes through the cylindrical seat with a gap provided therebetween.

[0011] Preferably, two fixed arms are formed on the outer side of the cylindrical seat.

[0012] Preferably, an outwardly extending eccentric arm is formed at the bottom of the planetary gear, and one end of the swing arm is rotatably connected to the eccentric arm.

[0013] Preferably, a first end shaft is formed at the end of the eccentric support arm, a second end shaft is formed at the bottom of the telescopic arm, and both ends of the swing arm are rotatably connected to the first end shaft and the second end shaft respectively.

[0014] Preferably, a third end shaft is formed at the bottom of the main spray arm, and the third end shaft passes through the planetary gear and the two are rotationally connected.

[0015] Preferably, a boss is formed on the top of the telescopic arm, the boss extends along the length direction of the telescopic arm, multiple second spray holes are arranged on the boss, a water trough is formed on the inner side of the boss, and multiple second spray holes are connected to the water trough.

[0016] Preferably, a first oblique spray hole is provided at the end of the main spray arm, and a second oblique spray hole is provided at the end of the telescopic arm, and the first oblique spray hole and the second oblique spray hole are respectively directed towards two sides of the main spray arm.

[0017] Preferably, the movement trajectory of the second spray hole includes four quadrants, and the movement trajectory of the second spray hole in each quadrant is crest-shaped.

[0018] In the telescopic spray arm structure of the dishwasher disclosed in the present invention, the fixed toothed disc is fixedly installed in the water cup of the dishwasher. The main spray arm rotates around the hollow shaft during operation, and based on the meshing relationship with the fixed toothed disc, drives the planetary gear to move around the fixed toothed disc and rotate on its own. When the planetary gear rotates, the eccentric position drives the swing arm to swing, and then the swing arm is used to drive the telescopic arm to telescope relative to the main spray arm. During this process, multiple first spray holes all move along circular trajectories, and multiple second spray holes move radially as the telescopic arm extends and retracts, so that the corner areas of the dishwasher inner tank and the areas between adjacent circular trajectories can be sprayed by water columns, which not only improves the cleaning efficiency and cleaning quality, but also effectively saves water resources, and better meets application requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a perspective view of a telescopic spray arm structure of a dishwasher according to the present invention;

[0020] FIG2 is a second perspective view of the telescopic spray arm structure of the dishwasher according to the present invention;

[0021] FIG3 is an exploded view of the telescopic spray arm structure of the dishwasher according to the present invention;

[0022] FIG4 is a second exploded view of the telescopic spray arm structure of the dishwasher of the present invention;

[0023] FIG5 is a diagram showing the motion trajectory of the spray holes of the telescopic spray arm structure of the dishwasher according to the present invention;

[0024] FIG6 is a motion trajectory diagram of the second nozzle in FIG5 within a quadrant. DETAILED DESCRIPTION

[0025] The present invention discloses a telescopic spray arm structure for a dishwasher, as shown in Figures 1 to 4, which includes a main spray arm 1, a fixed gear plate 2, a telescopic arm 3, a planetary gear 4 and a swing arm 5. The telescopic arm 3 is sleeved on one end of the main spray arm 1 and the two are slidably matched. The internal cavity of the main spray arm 1 and the internal cavity of the telescopic arm 3 are connected to each other. The main spray arm 1 is provided with a plurality of first spray holes 10, and the telescopic arm 3 is provided with a plurality of second spray holes 30. A hollow shaft 11 is formed at the center of the bottom of the main spray arm 1, and the hollow shaft 11 passes through The fixed gear plate 2, and the hollow shaft 11 can rotate relative to the fixed gear plate 2, the planetary gear 4 is located between the fixed gear plate 2 and the telescopic arm 3, and the planetary gear 4 is rotatably connected to the bottom of the main spray arm 1, the planetary gear 4 and the fixed gear plate 2 are engaged with each other, one end of the swing arm 5 is rotatably connected to the eccentric position of the planetary gear 4, and the other end of the swing arm 5 is rotatably connected to the telescopic arm 3, and the swing arm 5 is used to drive the telescopic arm 3 to telescopically move relative to the main spray arm 1 when the planetary gear 4 rotates.

[0026] In the above structure, the fixed toothed disc 2 is fixedly installed in the water cup of the dishwasher. The main spray arm 1 rotates around the hollow shaft 11 during operation. Based on the meshing relationship with the fixed toothed disc 2, the planetary gear 4 is driven to move around the fixed toothed disc 2 and rotate. When the planetary gear 4 rotates, the eccentric position drives the swing arm 5 to swing, and then the swing arm 5 is used to drive the telescopic arm 3 to telescope relative to the main spray arm 1, thereby forming a motion trajectory as shown in Figure 5. During this process, the multiple first spray holes 10 all move along a circular trajectory, and the multiple second spray holes 30 move radially as the telescopic arm 3 extends and contracts, so that the corner areas of the dishwasher inner tank and the areas between adjacent circular trajectories can be sprayed by water columns, which not only improves the cleaning efficiency and cleaning quality, but also effectively saves water resources, and better meets application requirements.

[0027] In this embodiment, the cleaning water is transported into the main spray arm 1 by the hollow shaft 11 , and therefore, the hollow shaft 11 is communicated with the inner cavity of the main spray arm 1 .

[0028] In order to securely fix the fixed gear plate 2, in this embodiment, a cylindrical seat 20 is formed at the bottom of the fixed gear plate 2, and the hollow shaft 11 passes through the cylindrical seat 20 with a gap therebetween. The gap can prevent interference between the hollow shaft 11 and the cylindrical seat 20, thereby ensuring stable rotation of the hollow shaft 11.

[0029] Regarding the preferred fixing method of the cylindrical seat 20, please refer to Figure 2. Two fixing arms 21 are formed on the outer side of the cylindrical seat 20. Specifically, the fixing arms 21 are provided with fixing holes.

[0030] Because the planetary gear 4 is relatively small, in order to better coordinate with the swing arm 5, in this embodiment, an outwardly extending eccentric arm 40 is formed at the bottom of the planetary gear 4, and one end of the swing arm 5 is rotatably connected to the eccentric arm 40. The provision of the eccentric arm 40 can increase the swing amplitude of the swing arm 5, thereby increasing the telescopic motion range of the telescopic arm 3.

[0031] In order to achieve the rotational coordination relationship between the two ends of the telescopic arm 3, in this embodiment, a first end shaft 41 is formed at the end of the eccentric support arm 40, and a second end shaft 31 is formed at the bottom of the telescopic arm 3, and the two ends of the swing arm 5 are respectively rotatably connected to the first end shaft 41 and the second end shaft 31.

[0032] Furthermore, a third end shaft 12 is formed at the bottom of the main spray arm 1 , and the third end shaft 12 passes through the planetary gear 4 and the two are rotationally connected.

[0033] In actual applications, narrow slots are provided on the first end shaft 41, the second end shaft 31 and the third end shaft 12, so that the first end shaft 41, the second end shaft 31 and the third end shaft 12 are elastic, which is conducive to inserting each end shaft into the shaft hole at both ends of the swing arm 5 and the center of the planetary gear 4.

[0034] When the telescopic arm 3 performs telescopic movement, in order to avoid blocking or obstructing the second spray hole 30, in this embodiment, please refer to Figure 4, a boss 32 is formed on the top of the telescopic arm 3, and the boss 32 extends along the length direction of the telescopic arm 3. Multiple second spray holes 30 are all arranged on the boss 32, and a water trough 33 is formed on the inner side of the boss 32. Multiple second spray holes 30 are all connected to the water trough 33.

[0035] As a preferred embodiment, the end of the main spray arm 1 is provided with a first oblique spray hole 13, and the end of the telescopic arm 3 is provided with a second oblique spray hole 34. The first oblique spray hole 13 and the second oblique spray hole 34 are respectively oriented toward the two sides of the main spray arm 1. When the first oblique spray hole 13 and the second oblique spray hole 34 are respectively oriented toward the two sides, the reverse thrust of the water column can drive the entire spray arm to rotate automatically.

[0036] As a preferred embodiment of the present invention, regarding the water spraying trajectory of the second spray hole 30, as shown in Figures 5 and 6, the movement trajectory of the second spray hole 30 includes four quadrants (A, B, C, D), and the movement trajectory of the second spray hole 30 in each quadrant is crest-shaped, thereby forming a crest trajectory segment 300.

[0037] In the above trajectory, by reasonably setting the size ratio of the fixed gear plate 2 and the planetary gear 4, and reasonably setting the extended length of the eccentric support arm 40, a water spray trajectory as shown in Figure 5 can be generated, wherein the movement trajectory of the second spray hole 30 is close to a square as a whole, with an outer rounded corner shape and an inner concave shape at the corner position and the middle position of the square side, respectively. Similarly, a rounded peak-shaped trajectory as shown in Figure 6 is generated in the above four quadrants. Based on the above trajectory, the water column sprayed from the second spray hole 30 can not only be sprayed to the corner area of ​​the dishwasher inner tank, but also to the area between the two concentric circle trajectories, thereby realizing comprehensive spraying of the inner tank area, which not only improves the cleaning efficiency and cleaning quality, but also effectively saves water and avoids waste of resources.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included in the scope of protection of the present invention.

Claims

1. A telescopic spray arm structure for a dishwasher, characterized in that: The invention comprises a main spray arm (1), a fixed toothed disc (2), a telescopic arm (3), a planetary gear (4) and a swing arm (5); the telescopic arm (3) is sleeved on one end of the main spray arm (1) and the two are slidably matched; the internal cavity of the main spray arm (1) and the internal cavity of the telescopic arm (3) are communicated with each other; the main spray arm (1) is provided with a plurality of first spray holes (10); the telescopic arm (3) is provided with a plurality of second spray holes (30); a hollow shaft (11) is formed at the bottom center of the main spray arm (1); the hollow shaft (11) passes through the fixed toothed disc (2); and the hollow shaft (11) can rotate relative to the fixed toothed disc (2), the planetary gear (4) is located between the fixed toothed disc (2) and the telescopic arm (3), and the planetary gear (4) is rotatably connected to the bottom of the main spray arm (1), the planetary gear (4) and the fixed toothed disc (2) are meshed with each other, one end of the swing arm (5) is rotatably connected to the eccentric position of the planetary gear (4), and the other end of the swing arm (5) is rotatably connected to the telescopic arm (3), and the swing arm (5) is used to drive the telescopic arm (3) to telescope relative to the main spray arm (1) when the planetary gear (4) rotates.

2. The telescopic spray arm structure of a dishwasher according to claim 1, characterized in that: The hollow shaft (11) is in communication with the inner cavity of the main spray arm (1).

3. The telescopic spray arm structure of a dishwasher according to claim 1, characterized in that: A cylindrical seat (20) is formed at the bottom of the fixed toothed disc (2), and the hollow shaft (11) passes through the cylindrical seat (20) with a gap provided therebetween.

4. The telescopic spray arm structure of a dishwasher according to claim 3, characterized in that: Two fixed arms (21) are formed on the outer side of the cylindrical seat (20).

5. The telescopic spray arm structure of a dishwasher according to claim 1, characterized in that: An eccentric support arm (40) extending outward is formed at the bottom of the planetary gear (4), and one end of the swing arm (5) is rotatably connected to the eccentric support arm (40).

6. The telescopic spray arm structure of a dishwasher according to claim 5, characterized in that: A first end shaft (41) is formed at the end of the eccentric support arm (40), a second end shaft (31) is formed at the bottom of the telescopic arm (3), and both ends of the swing arm (5) are rotatably connected to the first end shaft (41) and the second end shaft (31), respectively.

7. The telescopic spray arm structure of a dishwasher according to claim 1, characterized in that: A third end shaft (12) is formed at the bottom of the main spray arm (1), and the third end shaft (12) passes through the planetary gear (4) and the two are rotatably connected.

8. The telescopic spray arm structure of a dishwasher according to claim 1, characterized in that: A boss (32) is formed at the top of the telescopic arm (3), the boss (32) extends along the length direction of the telescopic arm (3), a plurality of second spray holes (30) are arranged on the boss (32), a water containing groove (33) is formed on the inner side of the boss (32), and the plurality of second spray holes (30) are connected to the water containing groove (33).

9. The telescopic spray arm structure of a dishwasher according to claim 1, characterized in that: The end of the main spray arm (1) is provided with a first oblique spray hole (13), and the end of the telescopic arm (3) is provided with a second oblique spray hole (34), and the first oblique spray hole (13) and the second oblique spray hole (34) are respectively oriented toward two sides of the main spray arm (1).

10. The telescopic spray arm structure of a dishwasher according to claim 1, characterized in that: The movement trajectory of the second spray hole (30) includes four quadrants, and the movement trajectory of the second spray hole (30) in each quadrant is in a crest shape.

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