CN117752280A - Spraying mechanism and cleaning machine - Google Patents

Abstract

Spray mechanism and cleaning machine, spray mechanism including: the length direction of the main spray arm is a first longitudinal direction, a main runner extending along the first longitudinal direction is arranged in the main spray arm, and a water inlet for supplying water into the main runner is formed in the main spray arm; the auxiliary spray arm is arranged on the main spray arm in a mode of moving back and forth along the first longitudinal direction, a secondary flow channel communicated with the main flow channel is arranged in the auxiliary spray arm, and a spray hole for water supply and spray outflow is formed in the auxiliary spray arm; the auxiliary spray arm and the main spray arm are provided with a conversion piece therebetween, and the conversion piece can drive the auxiliary spray arm to rotate under the action force of the movement of the auxiliary spray arm so as to change the orientation of the spray hole. Compared with the prior art, the auxiliary spray arm can rotate to change the direction of the spray holes when moving back and forth, so that the spray range of the spray arm can be increased, and the cleaning effect is improved.

Description

Spraying mechanism and cleaning machine

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a spraying mechanism and a cleaning machine capable of cleaning bowls, chopsticks and/or fruits and vegetables.

Background

The existing cleaning machine sprays water onto tableware by a spray arm, and food residues on the tableware are washed down by repeated washing.

The spraying mechanism with the spraying arm is as disclosed in patent application No. 202010151519.5, publication No. CN111329425B, and the spraying arm for the cleaning machine comprises a main spraying arm, a main flow passage is formed in the main spraying arm, and a water inlet passage for water to flow into the main flow passage is formed in the main spraying arm; the auxiliary spray arm is internally provided with a diversion channel which is in fluid communication with the main channel, and at least one of the auxiliary spray arm and the main spray arm is provided with a spray hole; the main spray arm is internally provided with a cavity which is not communicated with the main flow channel and the water inlet channel; the auxiliary spray arm can be arranged on the main spray arm in a back-and-forth moving way along the length direction of the main spray arm; the spray arm also comprises a fixing piece which is positioned in the water inlet channel, and the main spray arm is arranged to rotate around the fixing piece; and the linkage assembly is at least partially positioned in the cavity and used for enabling the auxiliary spray arm to move back and forth along the length direction of the main spray arm, the output end of the linkage assembly is in transmission connection with the auxiliary spray arm, and the input end of the linkage assembly is arranged to be capable of rotating around the fixing piece.

The above patent reliably expands and contracts through the spray arm to increase the cleaning area, but since the head and flow of the water pump are fixed, the size and number of spray holes on the spray arm are limited in order to ensure the spray pressure, and the spray holes are distributed at intervals (the interval distance is generally 20-70 mm), which results in uneven coverage of the spray holes, the places where the spray holes cannot be scanned can be cleaned by the sputtering of water only, and the water scouring force of the sputtering is reduced by an order of magnitude, thereby affecting the cleaning ability.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a spraying mechanism capable of improving the spraying range aiming at the current state of the art.

The second technical problem to be solved by the invention is to provide a cleaning machine with the spraying mechanism.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a spray mechanism, comprising:

the length direction of the main spray arm is a first longitudinal direction, a main runner extending along the first longitudinal direction is arranged in the main spray arm, and a water inlet for supplying water into the main runner is formed in the main spray arm;

the auxiliary spray arm is arranged on the main spray arm in a mode of moving back and forth along the first longitudinal direction, a secondary flow channel communicated with the main flow channel is arranged in the auxiliary spray arm, and a spray hole for water supply and spray outflow is formed in the auxiliary spray arm;

the method is characterized in that:

the auxiliary spray arm and the main spray arm are provided with a conversion piece therebetween, and the conversion piece can drive the auxiliary spray arm to rotate under the action force of the movement of the auxiliary spray arm so as to change the orientation of the spray hole.

Therefore, when the auxiliary spray arm moves back and forth, the auxiliary spray arm can rotate to change the direction of the spray hole, so that the spray range of the spray arm can be improved, and the cleaning effect is improved.

Preferably, the auxiliary spray arm and the main spray arm are coaxially arranged, and the axis is the rotation axis of the auxiliary spray arm.

In order to enable the auxiliary spray arm to move back and forth, preferably, the first end of the auxiliary spray arm is open and longitudinally inserted into the end part of the main spray arm to communicate the auxiliary flow channel with the main flow channel, and the second end of the auxiliary spray arm is a closed free end positioned outside the main spray arm, so that the auxiliary spray arm can move outwards under the action of water flow;

the auxiliary spray arm is provided with an elastic piece which acts on the auxiliary spray arm so that the auxiliary spray arm always has a trend of inward movement.

Therefore, the auxiliary spray arm can move outwards under the action of water flow, and can move inwards to reset under the action of the elastic piece after the water flow stops, so that driving mechanisms such as telescopic pieces and the like are not required to be additionally arranged.

In order to enable the conversion member to rotate the auxiliary spray arm under the action of the movement of the auxiliary spray arm so as to change the orientation of the spray hole, preferably, the end portion of the main spray arm is provided with a circumferential wall extending along the first longitudinal direction, the inner circumferential surface of the circumferential wall is provided with a guide groove extending obliquely along the circumferential direction, the auxiliary spray arm is provided with a guide block capable of being inserted into the guide groove and moving along the guide groove, and the guide block and the guide groove form the conversion member.

Therefore, when the auxiliary spray arm moves back and forth, the guide block on the auxiliary spray arm can be driven to move along the guide groove, and as the guide groove extends obliquely along the circumferential direction, namely, the extending direction of the guide groove forms an included angle with the circumferential direction and forms an included angle with the first longitudinal direction, the auxiliary spray arm can rotate in the circumferential direction while moving, and the direction of the spray hole is changed.

Preferably, the guide groove has a first section which is sequentially communicated and extends obliquely inward in a first circumferential direction which is clockwise or counterclockwise, a second section which extends obliquely inward in a second circumferential direction which is opposite to the first circumferential direction from an inner end of the first section, a third section which extends obliquely outward in the second circumferential direction from an inner end of the second section, a fourth section which extends obliquely inward in the second circumferential direction from an outer end of the third section, and a fifth section which extends obliquely outward in the first circumferential direction from an inner end of the fourth section, and an outer end of the fifth section is engaged with an outer end of the first section. Thus, the orientation of the spray holes can be changed with each back and forth movement of the secondary spray arm.

Preferably, the inner peripheral surface of the annular wall is provided with a groove, the side wall of the groove is provided with a first part which extends obliquely inwards along the first circumferential direction, a second part which extends obliquely inwards along the second circumferential direction from the inner end part of the first part, a third part which extends obliquely outwards along the second circumferential direction from the inner end part of the second part, a fourth part which extends obliquely inwards along the second circumferential direction from the outer end part of the third part, and a fifth part which extends obliquely outwards along the first circumferential direction from the inner end part of the fourth part, and the outer end part of the fifth part is connected with the outer end part of the first part;

the side wall of the groove is surrounded by a center, a baffle strip is arranged at the center of the side wall of the groove, a first end part of the baffle strip is opposite to an inner end part of the first part at intervals, a second end part of the baffle strip is opposite to an inner end part of the fourth part at intervals, the baffle strip is provided with a first strip-shaped part extending outwards obliquely from the first end part of the baffle strip along a second circumferential direction, a second strip-shaped part extending inwards obliquely from an outer end part of the first strip-shaped part to the second end part along the second circumferential direction, the outer end part of the first part of the side wall of the groove and the outer end part of the third part of the side wall of the baffle strip are staggered with the outer end part of the first strip-shaped part in a first longitudinal direction and are opposite to the first strip-shaped part, and the side wall of the groove and the baffle strip jointly define the guide groove.

In each of the above schemes, there may be only one or two auxiliary spray arms, and when there are two auxiliary spray arms, both the two auxiliary spray arms may move back and forth and rotate, or one of the two auxiliary spray arms is a fixed spray arm, and the other one may move back and forth and rotate. Preferably, the two auxiliary spray arms are respectively arranged at two ends of the main spray arm in the first longitudinal direction in a mode of being capable of moving back and forth and rotating along the first longitudinal direction;

the two conversion parts are also arranged, the guide grooves of the conversion parts are respectively arranged corresponding to the two ends of the main spray arm, and the guide blocks of the conversion parts are respectively arranged on the corresponding auxiliary spray arms;

the water inlet hole is positioned at the center of the first longitudinal direction of the main spray arm.

Further, the guide grooves of the two conversion parts are symmetrically arranged with the water inlet hole as a center, so that the rotation directions of the two auxiliary spray arms are opposite. Therefore, the spray holes on the two auxiliary spray arms are opposite in direction, and the spray range is further improved.

Preferably, a restraint piece used for ensuring that the two auxiliary spray arms rotate in opposite directions is further arranged in the main spray arm.

Preferably, the restraint includes:

a sun gear rotatably provided at the center of the main shower arm in the first longitudinal direction thereof about a rotation axis perpendicular to the first longitudinal direction;

two side gears with opposite rotation directions are arranged at two sides of the central gear at intervals along the first longitudinal direction, are arranged in the main spray arm in a manner of being capable of rotating around the axis of the main spray arm, and are meshed with the central gear; the two side gears are provided with guide arms extending along the first longitudinal direction in opposite postures, each guide arm is provided with a strip-shaped hole extending along the length direction, and the first end of each auxiliary spray arm is respectively provided with a convex column which can be inserted into the corresponding strip-shaped hole.

Further, the two elastic pieces are respectively arranged corresponding to the respective auxiliary spray arms, so that the two auxiliary spray arms always have a trend of being relatively close.

In order to prevent the elastic member from affecting the movement and rotation of the auxiliary spray arm, preferably, the elastic member is a spring disposed in the main spray arm and extending along the first longitudinal direction, one end of the spring is constrained to the rotating shaft, and the other end of the spring is constrained to the central position of the opening of the first end of the corresponding auxiliary spray arm. Therefore, the elastic energy drives the auxiliary spray arm to move inwards and simultaneously plays a role of a torsion spring, so that the auxiliary spray arm has a tendency of rotating to an initial position.

The invention solves the second technical problem by adopting the technical proposal that: a cleaning machine characterized by having the spraying mechanism as described above.

Compared with the prior art, the invention has the advantages that: through setting up the conversion piece between auxiliary spray arm and main spray arm for can also rotate and change the orientation of spraying the hole when auxiliary spray arm round trip movement, thereby can improve the spray range of spray arm, improve cleaning performance.

Drawings

FIG. 1 is a schematic view showing a partial structure of a cleaning machine according to a first embodiment of the present invention;

FIG. 2 is a partial sectional view of a washer according to a first embodiment of the present invention;

FIG. 3 is an exploded perspective view of a spray mechanism according to a first embodiment of the present invention;

FIG. 4 is a longitudinal cross-sectional view of a primary spray arm in accordance with a first embodiment of the present invention;

FIG. 5 is a schematic view of a guide slot according to a first embodiment of the present invention;

FIG. 6 is a view showing the state of use of the spray mechanism (the sub spray arm moves inward, the guide block is located at the inner end of the fourth section of the guide groove) according to the first embodiment of the present invention;

FIG. 7 is a schematic view of the structure of FIG. 6 from another perspective;

FIG. 8 is a view showing the state of use of the spray mechanism (the sub spray arm moves outwards, the guide block is located at the outer end of the first section of the guide groove) according to the first embodiment of the present invention;

FIG. 9 is a schematic view of the structure of FIG. 8 from another perspective;

FIG. 10 is a view showing the state of use of the spray mechanism (the sub spray arm moves outwards, and the guide block is located at the outer end of the third section of the guide groove) according to the first embodiment of the present invention;

FIG. 11 is a schematic view of the structure of FIG. 10 from another perspective;

FIG. 12 is a longitudinal cross-sectional view of a spray mechanism in accordance with a second embodiment of the present invention;

fig. 13 is another longitudinal cross-sectional view of a spray mechanism in accordance with a second embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the embodiments of the drawings.

Embodiment one:

as shown in fig. 1 to 11, a spraying mechanism and a cleaning machine according to a preferred embodiment of the present invention, the spraying mechanism includes a main spray arm 1, a sub spray arm 2, an elastic member 3, and a constraint member 4.

The length direction of the main spray arm 1 is a first longitudinal direction (the first longitudinal direction in this embodiment extends horizontally), the main spray arm 1 has a main flow channel 10 extending along the first longitudinal direction and penetrating, and a water inlet 11 for supplying water into the main flow channel 10 is formed in the center of the main spray arm 1 in the first longitudinal direction. Both ends of the main shower arm 1 in the first longitudinal direction have annular walls 1a extending in the first longitudinal direction, and the annular walls 1a have a circular cross section.

The number of the auxiliary spray arms 2 is two, and the auxiliary spray arms 2 are respectively arranged corresponding to the two ends of the main spray arm 1 in the first longitudinal direction, and the auxiliary spray arms 2 and the main spray arm 1 are coaxially arranged. Specifically, each auxiliary spray arm 2 is internally provided with an auxiliary flow channel 20 extending along the first longitudinal direction, each auxiliary spray arm 2 is provided with a plurality of spray holes 21 for water to flow out, and the spray holes 21 are distributed at intervals along the first longitudinal direction. Meanwhile, the first end of each auxiliary spray arm 2 is opened and longitudinally inserted into the annular wall 1a of the corresponding main spray arm 1, and is communicated with the auxiliary flow channel 20 and the main flow channel 10, and the second end of each auxiliary spray arm 2 is a closed free end positioned outside the main spray arm 1, so that the auxiliary spray arms 2 can move outwards under the action of water flow.

The elastic members 3 are springs extending along the first longitudinal direction, and two springs are respectively arranged corresponding to the respective auxiliary spray arms 2, so that the two auxiliary spray arms 2 always have a tendency to move inwards and relatively close.

In this embodiment, a conversion member is disposed between the main spray arm 1 and each auxiliary spray arm 2, and the conversion member can drive the auxiliary spray arm 2 to rotate under the action force of the movement of the auxiliary spray arm 2 to change the orientation of the spray hole 21, where the rotation axis of the auxiliary spray arm 2 is the central axis of the main spray arm 1 (the central axis of the main spray arm 1 extends along the first longitudinal direction and passes through the center of the circle corresponding to each annular wall 1 a). The structure of the conversion member in this embodiment is as follows:

the inner peripheral surface of the annular wall 1a is provided with a guide groove 12 extending obliquely in the circumferential direction, and the sub shower arm 2 is provided with a guide block 22 which can be inserted into the guide groove 12 and move along the guide groove 12, and the guide block 22 and the guide groove 12 constitute the conversion member.

The guide groove 12 of the present embodiment is defined by a groove 100 provided on the inner peripheral surface of the annular wall 1a and a stopper strip 110 provided in the center of the groove 100, the side wall of the groove 100 has a first portion 101 extending obliquely inward in a first circumferential direction clockwise or counterclockwise, a second portion 102 extending obliquely inward in a second circumferential direction opposite to the first circumferential direction from the inner end of the first portion 101, a third portion 103 extending obliquely outward in the second circumferential direction from the inner end of the second portion 102, a fourth portion 104 extending obliquely inward in the second circumferential direction from the outer end of the third portion 103, a fifth portion 105 extending obliquely outward in the first circumferential direction from the inner end of the fourth portion 104, and the outer end of the fifth portion 105 is engaged with the outer end of the first portion 101; the first end of the barrier rib 110 is spaced opposite to the inner end of the first portion 101, the second end of the barrier rib 110 is spaced opposite to the inner end of the fourth portion 104, and the barrier rib 110 has a first bar portion 111 extending obliquely outwardly from the first end thereof in the second circumferential direction, a second bar portion 112 extending obliquely inwardly from the outer end of the first bar portion 111 in the second circumferential direction to the second end, the outer end of the first portion 101 and the outer end of the third portion 103 of the side wall of the groove 100 are both staggered in the first longitudinal direction from the outer end of the first bar portion 111 and are both opposite to the first bar portion 111, so that the first portion 101 of the side wall of the groove 100 and the first bar portion 111 of the barrier rib 110 define a first section 121 of the guide groove 12, the first section 121 extending obliquely inwardly in the first circumferential direction; the first portion 102 of the side wall of the recess 100 and the first end of the bar 110 define a second section 122 of the guide slot 12, the second section 122 extending obliquely inward in a second circumferential direction from the inner end of the first section 121; the third portion 103 of the sidewall of the groove 100 and the first strip portion 111 of the barrier rib 110 define a third section 123 of the guide groove 12, the third section 123 extending obliquely outwardly from the inner end of the second section 122 in the second circumferential direction; the fourth portion 104 of the sidewall of the groove 100 and the second strip-shaped portion 112 of the barrier rib 110 define a fourth section 124 of the guide groove 12, the fourth section 124 extending obliquely inward in the second circumferential direction from the outer end of the third section 123; the fifth portion 105 of the sidewall of the groove 100 and the second strip portion 112 of the barrier rib 110 define a fifth section 125 of the guide groove 12, the fifth section 125 extending obliquely outwardly in the first circumferential direction from the inner end of the fourth section 124, the outer end of the fifth section 125 being engaged with the outer end of the first section 121.

In the initial state, under the action of the elastic member 3, the guide block 22 is located at the junction of the fourth portion 104 and the fifth portion 105 of the side wall of the groove 100 (i.e. the S1 position in fig. 5), and the orientation of the spray holes 21 on the auxiliary spray arm 2 is shown in fig. 6 and 7; when the spraying mechanism works, water sequentially enters the main runner 10 and the auxiliary runner 20 from the water inlet hole 11, the auxiliary spray arm 2 moves outwards against the elastic force of the elastic piece 3 under the impact of water flow, in the process, the guide block 22 moves to the joint of the fifth part 105 and the first part 101 of the side wall of the groove 100 along the fifth section 125 of the guide groove 12 (namely, the S2 position in FIG. 5), the auxiliary spray arm 2 rotates in the circumferential direction during the movement, and the direction of the spray hole 21 on the auxiliary spray arm 2 is shown in FIG. 8 and 9; after stopping water supply in the spraying mechanism, the auxiliary spraying arm 2 moves inwards under the action of the elastic piece 3, in the process, the guide block 22 moves inwards to the position of the first strip-shaped part 111 of the barrier strip 110, then moves to the first end part of the barrier strip 110 along the first strip-shaped part 111, then moves to the junction of the second part 102 and the third part 103 of the side wall of the groove 100 (namely, the S3 position in fig. 5), and in the moving process, the auxiliary spraying arm 2 rotates in the circumferential direction; the spraying mechanism works again, water sequentially enters the main runner 10 and the auxiliary runner 20 from the water inlet hole 11, the auxiliary spray arm 2 overcomes the elasticity of the elastic piece 3 to move outwards under the impact of water flow, in the process, the guide block 22 moves outwards to the position of the first strip-shaped part 111 of the barrier strip 110, then moves to the included angle between the first strip-shaped part 111 and the second strip-shaped part 112 along the first strip-shaped part 111 (namely, the S4 position in fig. 5), the auxiliary spray arm 2 rotates in the circumferential direction during the movement, and the direction of the spray hole 21 on the auxiliary spray arm 2 is shown in fig. 10 and 11; after the water supply in the spraying mechanism is stopped, the auxiliary spraying arm 2 moves inwards under the action of the elastic piece 3, and in the process, the guide block 22 moves to the junction of the fourth part 104 and the fifth part 105 of the side wall of the groove 100 along the fourth section 124 of the guide groove 12 (namely, the S1 position in fig. 5) to finish resetting.

In this embodiment, the guide grooves 12 of the two switching members are symmetrically arranged with the water inlet 11 as a center, so that the rotation directions of the two auxiliary shower arms 2 are opposite.

The restraining piece 4 is arranged in the main spray arm 1 and is used for ensuring that the two auxiliary spray arms 2 rotate in opposite directions. Specifically, the restraint member 4 includes a sun gear 41 and two side gears 42 having opposite rotation directions, and the sun gear 41 is provided at a central position in the first longitudinal direction in the main shower arm 1 so as to be rotatable about an axis extending up and down perpendicular to the first longitudinal direction; the two side gears 42 are arranged at two sides of the central gear 41 along the first longitudinal direction at intervals, are arranged in the main spray arm 1 in a manner of being capable of rotating around the central axis of the main spray arm 1, and are meshed with the central gear 41; the two side gears 42 are provided with guide arms 43 extending in the first longitudinal direction in opposite postures, each guide arm 43 is provided with a strip-shaped hole 430 extending in the length direction, and the first end of each auxiliary spray arm 2 is respectively provided with a convex column 23 which can be inserted into the corresponding strip-shaped hole 430. In this way, the boss 23 can move along the guide arm 43 and also can rotate along with the guide arm 43.

As shown in fig. 1 and 2, the cleaning machine of this embodiment has the above-mentioned spraying mechanism, a box 5 and a water pump, in which the box 5 has a cleaning chamber, the main spray arm 1 of the spraying mechanism is provided in the box 5 in such a manner as to be rotatable about an axis extending vertically in the center thereof, and the water inlet 11 of the main spray arm 1 is directed downward and communicates with the water pump outlet, so that when the water pump is discharged, water can enter the spraying mechanism and then be sprayed out from the spray hole 21 on the sub spray arm 2, and when sprayed out, water flow can drive the spraying mechanism to rotate.

Embodiment two:

as shown in fig. 12 and 13, a spraying mechanism and a cleaning machine according to a second preferred embodiment of the present invention are basically the same as the first preferred embodiment, except that in this preferred embodiment, the sun gear 41 is rotatably disposed at the center of the main spray arm 1 in the first longitudinal direction about the rotation axis 40 perpendicular to the first longitudinal direction, each elastic member 3 is a spring disposed in the main spray arm 1 and extending in the first longitudinal direction, one end of the spring is restrained to the rotation axis 40, and the other end of the spring is restrained to the center of the opening of the first end of the corresponding sub spray arm 2.

In the description and claims of the present invention, terms indicating directions, such as "upper", "lower", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the invention may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Claims (13)

1. A spray mechanism, comprising:

the length direction of the main spray arm (1) is a first longitudinal direction, a main runner (10) extending along the first longitudinal direction is arranged in the main spray arm (1), and a water inlet hole (11) for water to flow into the main runner (10) is formed in the main spray arm (1);

the auxiliary spray arm (2) is arranged on the main spray arm (1) in a mode of moving back and forth along the first longitudinal direction, an auxiliary flow channel (20) communicated with the main flow channel (10) is arranged in the auxiliary spray arm (2), and a spray hole (21) for water supply to flow out is formed in the auxiliary spray arm (2);

the method is characterized in that:

a conversion piece is arranged between the auxiliary spray arm (2) and the main spray arm (1), and the conversion piece can drive the auxiliary spray arm (2) to rotate under the action force of the movement of the auxiliary spray arm (2) so as to change the orientation of the spray holes (21).

2. The spray mechanism of claim 1, wherein: the auxiliary spray arm (2) and the main spray arm (1) are coaxially arranged, and the axis is the rotation axis of the auxiliary spray arm (2).

3. The spray mechanism of claim 2, wherein: the first end of the auxiliary spray arm (2) is opened and is longitudinally inserted into the end part of the main spray arm (1) to communicate the auxiliary flow channel (20) with the main flow channel (10), and the second end of the auxiliary spray arm (2) is a closed free end positioned outside the main spray arm (1), so that the auxiliary spray arm (2) can move outwards under the action of water flow;

the auxiliary spray arm (2) is provided with an elastic piece (3) which acts on the auxiliary spray arm (2) so that the auxiliary spray arm (2) always has a trend of inward movement.

4. A spray mechanism as claimed in claim 3, wherein: the end part of the main spray arm (1) is provided with a ring wall (1 a) extending along the first longitudinal direction, the inner circumferential surface of the ring wall (1 a) is provided with a guide groove (12) extending along the circumferential direction in an inclined manner, the auxiliary spray arm (2) is provided with a guide block (22) which can be inserted into the guide groove (12) and move along the guide groove (12), and the guide block (22) and the guide groove (12) form the conversion piece.

5. The spray mechanism of claim 4, wherein: the guide groove (12) is provided with a first section (121) which is communicated in sequence and extends obliquely inwards along a clockwise or anticlockwise first circumferential direction, a second section (122) which extends obliquely inwards along a second circumferential direction opposite to the first circumferential direction from the inner end part of the first section (121), a third section (123) which extends obliquely outwards along the second circumferential direction from the inner end part of the second section (122), a fourth section (124) which extends obliquely inwards along the second circumferential direction from the outer end part of the third section (123), and a fifth section (125) which extends obliquely outwards along the first circumferential direction from the inner end part of the fourth section (124), wherein the outer end part of the fifth section (125) is connected with the outer end part of the first section (121).

6. The spray mechanism of claim 5, wherein: the inner peripheral surface of the annular wall (1 a) is provided with a groove (100), the side wall of the groove (100) is provided with a first part (101) extending inwards in an inclined manner along the first circumferential direction, a second part (102) extending inwards in an inclined manner along the second circumferential direction from the inner end part of the first part (101), a third part (103) extending outwards in an inclined manner along the second circumferential direction from the inner end part of the second part (102), a fourth part (104) extending inwards in an inclined manner along the second circumferential direction from the outer end part of the third part (103), and a fifth part (105) extending outwards in an inclined manner along the first circumferential direction from the inner end part of the fourth part (104), and the outer end part of the fifth part (105) is connected with the outer end part of the first part (101);

the center of the side wall circumference composition of the groove (100) is provided with a baffle strip (110), a first end part of the baffle strip (110) is opposite to the inner end part of the first part (101) at intervals, a second end part of the baffle strip is opposite to the inner end part of the fourth part (104) at intervals, the baffle strip (110) is provided with a first strip-shaped part (111) which extends outwards obliquely along a second circumferential direction from the first end part of the baffle strip, a second strip-shaped part (112) which extends inwards obliquely along the second circumferential direction from the outer end part of the first strip-shaped part (111) to the second end part of the baffle strip (110), the outer end parts of the first part (101) and the third part (103) of the side wall of the groove (100) are staggered with the outer end part of the first strip-shaped part (111) in a first longitudinal direction and are opposite to the first strip-shaped part (111), and the side wall of the groove (100) and the baffle strip (110) jointly define the guide groove (12).

7. The spray mechanism of any one of claims 4 to 6, wherein: the two auxiliary spray arms (2) are respectively arranged at two ends of the main spray arm (1) in the first longitudinal direction in a mode of being capable of moving back and forth and rotating along the first longitudinal direction;

the number of the conversion parts is two, the guide grooves (12) of each conversion part are respectively arranged corresponding to the two ends of the main spray arm (1), and the guide blocks (22) of each conversion part are respectively arranged on the corresponding auxiliary spray arm (2);

the water inlet hole (11) is positioned at the center of the first longitudinal direction of the main spray arm (1).

8. The spray mechanism of claim 7, wherein: the guide grooves (12) of the two conversion parts are symmetrically arranged with the water inlet hole (11) as a center, so that the rotation directions of the two auxiliary spray arms (2) are opposite.

9. The spray mechanism of claim 8, wherein: and a restraint piece (4) used for ensuring the two auxiliary spray arms (2) to rotate in the opposite direction is further arranged in the main spray arm (1).

10. The spray mechanism of claim 9, wherein: the restraint (4) comprises:

a sun gear (41) rotatably provided in the center of the main shower arm (1) in the first longitudinal direction about a rotation axis (40) perpendicular to the first longitudinal direction;

two side gears (42) with opposite rotation directions are arranged at two sides of the central gear (41) along the first longitudinal direction at intervals, are arranged in the main spray arm (1) in a manner of being capable of rotating around the axis of the main spray arm (1), and are meshed with the central gear (41); guide arms (43) extending along the first longitudinal direction and in opposite postures are arranged on the two side gears (42), strip-shaped holes (430) extending along the length direction are formed in the guide arms (43), and protruding columns (23) capable of being inserted into the corresponding strip-shaped holes (430) are respectively arranged at the first ends of the auxiliary spray arms (2).

11. The spray mechanism of claim 10, wherein: the two elastic pieces (3) are respectively arranged corresponding to the respective auxiliary spray arms (2) so that the two auxiliary spray arms (2) always have a trend of being relatively close.

12. The spray mechanism of claim 11, wherein: the elastic piece (3) is a spring which is arranged in the main spray arm (1) and extends along the first longitudinal direction, one end of the spring is restrained to the rotating shaft (40), and the other end of the spring is restrained to the central position of the opening of the first end of the corresponding auxiliary spray arm (2).

13. A cleaning machine having a spray mechanism as claimed in any one of claims 1 to 12.