CN117982074A - Spray arm mechanism and dish washer - Google Patents

Abstract

The application relates to a spray arm mechanism and a dish washer. The shower arm has a rotation axis and is configured to be rotatable about the rotation axis. The spray arm is configured with a lateral drive orifice configured to be disposed axially parallel to a first plane, the axis of rotation intersecting the first plane. The deflection structure is arranged on a flow path of the first jet flow sprayed out of the lateral driving jet hole and is used for deflecting the flow direction of the first jet flow to intersect with the first plane. The first jet flow sprayed by the spray hole is not directly sprayed to the side wall of the dish washer, but is sprayed to the deflection structure, and deflected under the guidance of the deflection structure. Therefore, the deflection structure can reduce the water quantity directly rushing to the side wall of the dish washer, and further reduce noise and hidden danger of sealing caused by the water quantity. The deflection structure also changes the jet flow from concentration to diffusion, which is favorable for fully spraying the detergent on the tableware and softening pollutants during washing.

Description

Spray arm mechanism and dish washer

Technical Field

The application relates to the technical field of cleaning equipment, in particular to a spray arm mechanism and a dish washing machine.

Background

The dish washer pumps water at the bottom of the inner container through the washing pump, pressurized water flows to the spray arm to be sprayed out, and sprayed jet flow impacts the surface of the tableware to peel off pollutants and then falls back to the bottom of the inner container to circulate all the time, so that the purpose of cleaning the tableware is achieved.

In the related art, besides the cleaning spray hole facing the tableware, the spray arm is additionally provided with a lateral driving spray hole, and water flow sprayed by the lateral driving spray hole can generate a reaction force to drive the spray arm to rotate so as to continuously change the cleaning position, so that the aim of fully cleaning is fulfilled. However, since the lateral side driving spray hole is not always directed towards the tableware, the water flow sprayed by the spray hole does not participate in washing, but directly impacts the wall surface of the inner container of the dish washer, so that great noise is generated, and meanwhile, the lateral side driving spray hole is a great challenge for sealing the inner container and the door body, so that the sealing failure of the inner container and the door body is possibly caused.

Disclosure of Invention

In view of the above, it is desirable to provide a spray arm mechanism and a dishwasher that can reduce impact of a water jet on a dishwasher liner while driving the spray arm mechanism to rotate by the water jet.

A spray arm mechanism comprising:

a shower arm having a rotation axis and configured to be rotatable about the rotation axis; the spray arm is provided with a lateral driving spray hole, the axial direction of the lateral driving spray hole is parallel to a first plane, and the rotating shaft is intersected with the first plane; and

The deflection structure is arranged on the flow path of the first jet flow sprayed out of the lateral driving jet hole and is used for deflecting the flow direction of the first jet flow to intersect with the first plane.

The first jet flow sprayed by the spray hole is not directly sprayed to the side wall of the dish washer, but is sprayed to the deflection structure, and deflected under the guidance of the deflection structure. Because the deflected water flow still has high forward speed, the momentum loss is not large, and enough momentum still drives the spray arm to rotate. Therefore, the spray arm mechanism utilizes the lateral driving spray hole to generate rotary driving force, and simultaneously utilizes the deflection structure to reduce the water quantity directly rushing to the side wall of the dish washer, thereby reducing noise and hidden danger of sealing caused by the water quantity. In addition, the water flow after deflection is in an inclined direction, which is favorable for spraying into the gap between tableware and tableware. The deflection structure also has the function of scattering the first jet flow, so that the jet flow is changed from concentrated to diffused, and the detergent is favorably sprayed onto tableware fully during washing, and the pollutants are softened.

In one embodiment, the deflection structure is configured with a flow guiding surface, and the flow guiding surface is provided with an incident end and an emergent end; the flow guiding surface is configured to receive the first jet by the incidence end and guide the first jet to be emitted by the emission end;

The plane of the emergent end or the tangent plane of the emergent end is intersected with the first plane.

Thus, the first jet flows towards the deflection structure, is blocked by the deflection structure, is guided by the guide surface of the first jet, and deflects and shoots out relative to the original direction after changing the flow direction.

In one embodiment, the deflecting structure is configured with a guide surface, the guide surface is arc-shaped, and an included angle between a tangential plane of the guide surface and the first plane is gradually increased in a direction away from the lateral driving nozzle.

In this way, the first jet can gradually undergo an angular deflection under the guidance of the curved guide surface. In other words, the first jet is guided by the guide surface of the deflecting structure to gradually rise in angle.

In one embodiment, the spray arm mechanism further comprises a deflection arm connected with the spray arm, wherein the deflection arm is provided with a deflection structure, and the deflection structure deflects the flow direction of the first jet flow to be obliquely intersected with the rotating shaft.

Thus, the deflection arm is used for forming a deflection structure, so that the deflection structure can be positioned in the direction of the lateral driving spray hole. In addition, the deflection arm is connected with the spray arm and can rotate along with the spray arm, so that the deflection structure can be static relative to the lateral driving spray hole in the rotation process of the spray arm and is always positioned in the direction of the lateral driving spray hole, and is blocked between the lateral driving spray hole and the side wall of the dish washer. In addition, the flow direction of the deflected first jet flow obliquely intersects with the rotating shaft, and the moment for driving the spray arm to rotate around the rotating shaft can be finally generated.

In one embodiment, the spray arm mechanism comprises a plurality of spray arms and a plurality of deflection arms, and each deflection arm is connected between two adjacent spray arms.

Therefore, the lateral driving spray holes of each spray arm are arranged between two ends of the spray arm in the longitudinal direction, and the deflection arms form deflection structures at positions corresponding to the lateral driving spray holes. The first jet flow generated by the lateral driving jet hole is deflected by the deflecting structure of the deflecting arm correspondingly arranged.

In one embodiment, each deflection arm comprises an arm body and two baffles, and the arm body is provided with an arc-shaped surface; the two baffles are arranged on the arm body at intervals, and the two baffles and the arc-shaped surface between the two baffles form the deflection structure together.

Therefore, the deflection structure is simple in structure, easy to manufacture, and easy to receive and emit the first jet after deflection.

In one embodiment, the relationship between the width W of the deflection structure in the longitudinal direction of the spray arm and the diameter D of the lateral drive orifice is: w is more than or equal to 2D.

Therefore, considering that the first jet ejected from the lateral driving jet orifice can generate certain diffusion after being ejected in the actual process, in order to make the first jet fully deflect the structure, the width W of the deflecting structure needs to be not less than 2 times of the diameter D of the lateral driving jet orifice.

In one embodiment, the spray arm is further configured with a wash spray orifice, and the deflecting structure deflects the flow direction of the first jet toward the wash spray orifice.

When the spray hole is driven laterally to spray the first jet, the generated reaction force can push the spray arm mechanism to rotate around the rotating shaft. The cleaning nozzle is arranged to face the dish basket, i.e. the dishes to be cleaned, and to continuously emit a second jet during rotation, flushing the dishes. The deflecting structure deflects the flow direction of the first jet flow towards the washing spray hole, so that the deflected first jet flow can be used for washing tableware.

In one embodiment, the cleaning nozzle is configured to be disposed axially parallel to a rotational axis, the lateral drive nozzle is configured to the peripheral side of the spray arm, and the first plane is perpendicular to the rotational axis.

So, when spray arm mechanism used, its first plane was the horizontal plane, and the rotation axis sets up along vertical direction, washs the orifice setting up. The first jet flows from the lateral driving jet holes along the horizontal direction, deflected by the deflecting structure and then ejected upwards along the inclined direction.

A dish washer includes the spray arm mechanism.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a spray arm mechanism according to an embodiment of the application.

FIG. 2 is a schematic cross-sectional view of the spray arm mechanism shown in FIG. 1 at A-A.

Fig. 3 is a schematic view of another angle structure of the spray arm mechanism shown in fig. 1.

Reference numerals illustrate: 100. a spray arm mechanism; 10. a spray arm; 11. laterally driving the spray holes; 13. cleaning the spray holes; 30. a deflection structure; 31. a flow guiding surface; 311. an incident end; 313. an exit end; 50. a deflection arm; 51. an arm body; 511. an arc surface; 53. a baffle; 101. a top surface; 103. a bottom surface; 1031. and a water inlet.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, if the terms "and/or", "and/or" are presented as merely one type of association relationship describing the associated object, it means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. These terms "first," "second," if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1 to 3, a spray arm mechanism 100 according to an embodiment of the present application includes a spray arm 10 and a deflection structure 30. The shower arm 10 has a rotation axis (the rotation axis is parallel to the Y direction as in fig. 2) and is configured to be rotatable about the rotation axis. The spray arm 10 is configured with a lateral drive spray orifice 11, the lateral drive spray orifice 11 being configured to be disposed axially (as shown in the X-direction in fig. 2) parallel to a first plane (corresponding to the paper surface of fig. 1), the lateral drive spray orifice 11 being configured to spray a first jet and thereby generate a driving force that drives the spray arm 10 to rotate about a rotational axis. The rotation axis intersects the first plane. The deflecting structure 30 is disposed on the flow path of the first jet (as shown by the arrows in fig. 1 and 2) for deflecting the flow direction of the first jet to intersect the first plane.

It will be appreciated that the spray arm mechanism 100 may be used in a dishwasher, and that the spray arm mechanism 100 may have a plurality of spray arms 10, all spray arms 10 configured to rotate about a rotational axis, the axes of the lateral drive spray orifices 11 of all spray arms 10 being coplanar and disposed about the rotational axis. The axis of the lateral driving spray hole 11 is arranged at the different surface from the rotating shaft so as to generate a moment for driving the spray arm 10 to rotate around the rotating shaft when the first jet is sprayed. Furthermore, the shower arm 10 is also constructed with cleaning spray holes 13, the cleaning spray holes 13 being arranged axially parallel to the rotation axis.

In this way, when the first jet is ejected from the lateral drive nozzle hole 11, the reaction force generated can push the arm mechanism 100 to rotate about the rotation axis. The cleaning nozzle 13 is then arranged to be directed towards the dish basket, i.e. towards the dishes to be cleaned, and to continuously emit a second jet of water during rotation, flushing the dishes. The deflector 30 deflects the flow direction of the first jet towards the wash nozzle 13 so that the deflected first jet can also be used for washing dishes.

The initial direction of the first jet ejected from the lateral driving nozzle 11 is parallel to the first plane, and the initial direction of the second jet ejected from the cleaning nozzle 13 intersects with the first plane. In use, the axis of rotation of the spray arm 10 may be arranged in a vertical direction.

It is understood that deflecting the flow direction of the first jet to intersect the first plane means changing the flow direction of the first jet such that the flow direction of the first jet is no longer parallel to the first plane, i.e. intersects the flow direction before deflection.

Specifically, the lateral drive spray holes 11 are directed toward the side walls of the dishwasher and the wash spray holes 13 are directed toward the top or bottom wall of the dishwasher. The deflecting structure 30 is disposed in the direction of the lateral driving nozzle 11, that is, between the lateral driving nozzle 11 and the side wall of the dishwasher, the first jet ejected from the lateral driving nozzle 11 will impact the deflecting structure 30, but not directly impact the side wall of the dishwasher.

The first jet ejected from the nozzle arm mechanism 100 and the side-driving nozzle 11 is not directly ejected to the side wall of the dishwasher, but is directed to the deflecting structure 30 and deflected under the guidance of the deflecting structure 30. Since the deflected water still has a high forward velocity, there is little loss of momentum and enough momentum is still available to drive the spray arm 10 to rotate. In this way, the spray arm mechanism 100 utilizes the lateral driving spray hole 11 to generate a rotation driving force, and simultaneously utilizes the deflection structure 30 to reduce the water quantity directly rushing to the side wall of the dish washer, thereby reducing the noise and the hidden danger of sealing caused by the water quantity.

In addition, the water flow after deflection is in an inclined direction, which is favorable for spraying into the gap between tableware and tableware. The deflection structure 30 is arranged outside the spray arm 10, so that the space of the spray arm 10 is not occupied, and the stability of water flow in the spray arm 10 is hardly affected. The deflector 30 also has the effect of breaking up the first jet from concentrated to diffuse, facilitating the adequate spraying of detergent onto the dishes during washing, softening the contaminants. Under the action of the deflection structure 30, the spray arm mechanism 100 can reduce spray dead angles, improve the utilization rate of water flow of the lateral driving spray holes 11, and the spray becomes diffused to be beneficial to sweeping down pollutants falling into the dish washing basket.

In some embodiments, the spray arm mechanism 100 has a top surface 101 and a bottom surface 103 disposed opposite to each other, and the cleaning nozzle 13 is configured on the top surface 101. The lateral driving spray holes 11 are formed on the circumferential side surface of the spray arm 10, and the first plane is perpendicular to the rotation axis.

The bottom surface 103 is provided with a water inlet 1031, and all the spray arms 10 can share the same water inlet 1031, and water flows from the water inlet 1031 along the respective longitudinal directions and then is sprayed from the lateral driving spray holes 11 and the cleaning spray holes 13, wherein the flowing directions are shown by arrows in fig. 3.

Thus, when the spray arm mechanism 100 is in use, the first plane thereof is a horizontal plane, the rotation axis is disposed along the vertical direction, and the cleaning nozzle 13 is disposed upward. The first jet is emitted from the lateral driving nozzle 11 along the horizontal direction, deflected by the deflecting structure 30, and emitted obliquely upward.

In some embodiments, the deflecting structure 30 is configured with a guiding surface 31, and the guiding surface 31 has an incident end 311 and an exit end 313. The flow guiding surface 31 is configured to receive the first jet from the incident end 311 and guide the first jet to be emitted from the emitting end 313. The plane of the exit end 313 or the tangential plane of the exit end 313 intersects the first plane.

After the incident end 311 receives the first jet, the flow guiding surface 31 guides the first jet to change the flow direction, and the first jet is emitted from the emitting end 313, and the first jet is deflected in the process of flowing along the flow guiding surface 31. The direction of flow of the deflected first jet is substantially parallel to the plane of the exit end 313 or the tangential plane of the exit end 313.

Thus, the first jet, while being directed towards the deflecting structure 30 and blocked by it, is also guided by its guiding surface 31, and deflected out relative to the original direction after changing the flow direction.

It will be appreciated that in other embodiments, the deflector 30 may also form a draft tube, an impingement impeller, etc., as long as the direction of the first jet is deflected to reduce the amount of water directed toward the dishwasher sidewall, without limitation.

In some embodiments, the flow guiding surface 31 is arc-shaped, and the angle between the tangential surface of the flow guiding surface 31 and the first plane increases gradually in the direction away from the lateral driving nozzle hole 11. Specifically, in a direction away from the lateral driving nozzle 11, an included angle between a tangential plane of the guide surface 31 and the rotation axis is gradually reduced, and tangential planes of the guide surface 31 may intersect with the rotation axis.

The curved flow guiding surface 31 can better guide the first jet to be deflected, wherein the tangential plane of the flow guiding surface 31 at the incidence end 311 can intersect or be parallel to the first plane. The inclined surface may even have a problem of spreading the first jet in a large amount compared to the cambered surface, and thus not being deflected effectively.

In this way, the first jet can gradually undergo an angular deflection guided by the curved guide surface 31. In other words, the first jet is guided by the guide surface 31 of the deflecting structure 30 to gradually rise in angle.

In some embodiments, the spray arm mechanism 100 further includes a deflector arm 50 coupled to the spray arm 10, the deflector arm 50 having a deflector structure 30 configured thereon, the deflector structure 30 deflecting the direction of flow of the first jet to diagonally intersect the axis of rotation.

The deflecting arm 50 is used to form the deflecting structure 30, so that the deflecting structure 30 can be oriented to laterally drive the nozzle 11. In addition, the deflection arm 50 is connected with the spray arm 10 and can rotate along with the spray arm 10, so that the deflection structure 30 can be static relative to the lateral driving spray hole 11 and always located in the direction of the lateral driving spray hole 11 to be blocked between the lateral driving spray hole 11 and the side wall of the dish washer in the rotation process of the spray arm 10. In addition, the direction of flow of the deflected first jet obliquely intersects the axis of rotation, and ensures that ultimately a moment is generated that drives the spray arm 10 to rotate about the axis of rotation.

Further, the spray arm mechanism 100 includes a plurality of spray arms 10 and a plurality of deflection arms 50, each deflection arm 50 being connected between two adjacent spray arms 10. Wherein, a plurality of spray arms 10 and a plurality of deflection arms 50 can be integrally arranged.

In this way, the lateral driving nozzle 11 of each spray arm 10 is disposed between two ends of the spray arm in the longitudinal direction, and the deflecting arm 50 forms a deflecting structure 30 at a position corresponding to the lateral driving nozzle 11. The first jet generated by the lateral driving jet hole 11 is deflected by the deflecting structure 30 of the deflecting arm 50 correspondingly arranged.

Further, each deflection arm 50 includes an arm body 51 and two baffles 53, and the arm body 51 is configured with an arcuate surface 511. The two baffles 53 are spaced apart from each other on the arm 51, and form the deflection structure 30 together with the arc surface 511 therebetween. The two baffles 53 may be disposed parallel to each other and spaced apart from each other in the longitudinal direction of the shower arm 10.

It will be appreciated that the portion of the arcuate surface 511 of each deflector arm 50 between the two baffles 53 is the arcuate flow guide surface 31.

In this way, the deflecting structure 30 is simple in structure, easy to manufacture, and easy to receive and emit the first jet after deflection.

It will be appreciated that in other embodiments, the deflector arms 50 may be spaced apart from the outer periphery of the spray arms 10 without connecting the spray arms 10 and form an annular deflector structure 30 around the spray arms 10. Thus, even if the deflection arm 50 does not rotate with the spray arm 10, the deflection structure 30 can be positioned in the direction of the lateral driving spray hole 11 and blocked between the lateral driving spray hole 11 and the side wall of the dishwasher to exert deflection effect no matter the spray arm 10 rotates to any position. The deflection arm 50 is not connected to the shower arm 10, and does not apply a force to the shower arm 10, so that the flow direction of the deflected first jet can be parallel to the rotation axis.

In some embodiments, the relationship between the width W of the deflector 30 in the lengthwise direction of the spray arm 10 and the diameter D of the lateral drive orifice 11 is: w is more than or equal to 2D.

It is to be understood that the width W of the deflector 30 in the longitudinal direction of the shower arm 10 can also be understood as the distance between two baffles 53.

Considering that the first jet ejected from the lateral driving nozzle 11 will generate a certain diffusion after being ejected in the actual process, in order to fully deflect the first jet into the structure 30, the width W of the deflecting structure 30 needs to be not less than 2 times the diameter D of the lateral driving nozzle 11.

The application also provides a dish washer comprising the spray arm mechanism 100.

It will be appreciated that the dishwasher further comprises a liner, a wash pump, a basket, etc. for its normal function, and will not be described in detail herein.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. A spray arm mechanism, the spray arm mechanism comprising:

A shower arm (10) having a rotation axis and configured to be rotatable about the rotation axis; the spray arm (10) is provided with a lateral driving spray hole (11), the axial direction of the lateral driving spray hole (11) is parallel to a first plane, and the rotating shaft is intersected with the first plane; and

And the deflection structure (30) is arranged on the flow path of the first jet flow sprayed out of the lateral driving spray hole (11) and is used for deflecting the flow direction of the first jet flow to intersect with the first plane.

2. The spray arm mechanism according to claim 1, wherein the deflecting structure (30) is configured with a guide surface (31), the guide surface (31) having an entrance end (311) and an exit end (313); the flow guiding surface (31) is configured to receive the first jet from the incidence end (311) and to guide the first jet to be emitted from the emission end (313);

the plane of the emergent end (313) or the tangent plane of the emergent end (313) is intersected with the first plane.

3. The spray arm mechanism according to claim 1, wherein the deflection structure (30) is configured with a guide surface (31), the guide surface (31) is arc-shaped, and an included angle between a tangential plane of the guide surface (31) and the first plane is gradually increased in a direction away from the lateral driving spray hole (11).

4. The spray arm mechanism of claim 1, further comprising a deflector arm (50) coupled to the spray arm (10), the deflector arm (50) having the deflector structure (30) formed thereon, the deflector structure (30) deflecting the direction of flow of the first jet to diagonally intersect the axis of rotation.

5. The spray arm mechanism of claim 4, wherein the spray arm mechanism comprises a plurality of said spray arms (10) and a plurality of said deflection arms (50), each of said deflection arms (50) being connected between two adjacent spray arms (10).

6. The spray arm mechanism according to claim 4, wherein each deflection arm (50) comprises an arm body (51) and two baffles (53), the arm body (51) being configured with an arcuate surface (511); the two baffles (53) are arranged on the arm body (51) at intervals, and form the deflection structure (30) together with the arc-shaped surface (511) between the two baffles.

7. The spray arm mechanism according to claim 1, characterized in that the relation between the width W of the deflecting structure (30) in the longitudinal direction of the spray arm (10) and the diameter D of the lateral drive nozzle orifice (11) is: w is more than or equal to 2D.

8. The spray arm mechanism of claim 1, wherein the spray arm (10) is further configured with a wash nozzle (13), the deflecting structure (30) deflecting the flow direction of the first jet towards the wash nozzle (13).

9. Spray arm mechanism according to claim 8, characterized in that the cleaning spray orifice (13) is arranged axially parallel to a rotational axis, the lateral drive spray orifice (11) being configured at the peripheral side of the spray arm (10) and the first plane being perpendicular to the rotational axis.

10. A dishwasher comprising a spray arm mechanism as claimed in any one of claims 1 to 9.