CN213405938U

CN213405938U - Door opening and closing mechanism and dish washing machine using same

Info

Publication number: CN213405938U
Application number: CN202021792523.1U
Authority: CN
Inventors: 王小强; 孙博
Original assignee: Jiangsu Leili Motor Co Ltd
Current assignee: Jiangsu Leili Motor Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-06-11
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a door opening and closing mechanism and a dish washing machine using the same, comprising a rack, an output gear with one end connected with the rack, a slipping component connected with the other end of a reduction gear component, and a power output component connected with the slipping component; wherein the slip assembly comprises at least a first rotating body and a second rotating body which are coaxially matched and suitable for relatively rotating; the second rotating body is connected with the output gear, and the first rotating body is connected with the power output assembly. The utility model discloses can improve the stability of the subassembly user state of skidding.

Description

Door opening and closing mechanism and dish washing machine using same

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a switching door mechanism and use dish washer of this switching door mechanism.

Background

The automatic door opening technology is characterized in that a motor is used for driving a reduction gear set, a gear is connected with a rack, and the rack is connected with a door of the dish washing machine. The system controls the positive and negative rotation of the motor to realize opening and closing. The dishwasher door can stay at a set position to perform actions such as heat dissipation, air exhaust and the like. But the door of the dish washer can not be automatically closed after heat dissipation and exhaust, so that foreign matters can enter the compartment to destroy the dish washing effect. The switch door mechanism is equipped with the mechanism of skidding simultaneously, hinders with great external force when meetting, and the mechanism of skidding can skid the integrality that comes protection system, and the mechanism of skidding that uses among the prior art directly meshes with the rack mutually, and the external force that the mechanism of skidding receives is great, and is also big to the moment requirement of skidding, so have higher requirement to component intensity and the corresponding material that constitutes the mechanism of skidding promptly, can increase manufacturing cost like this. In addition, the existing slipping design has the defect that the slipping mechanism slips when the dishwasher door is blocked and cannot move continuously, and the slipping mechanism still works when the dishwasher door accelerates or decelerates under external force. This situation may cause the slipping mechanism to be in an operating state all the time when encountering an abnormality, and the life of the slipping mechanism is reduced. Meanwhile, the slipping moment of the motor cannot be well determined, and when the motor encounters external force to perform reverse thrust, the slipping mechanism possibly does not work, so that the motor rotates reversely, current is generated, and a control circuit is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a first purpose provides an on-off door mechanism to solve and improve the structural stability in use technical problem that skids.

The second purpose of the utility model is to provide a dish washer to solve the structure stability in use technical problem that skids that improves the switching door mechanism.

The utility model discloses a switch door mechanism realizes like this:

an opening and closing door mechanism comprising: the device comprises a rack, an output gear, a slipping component and a power output component, wherein one end of the output gear is connected with the rack, the slipping component is connected with the other end of the output gear, and the power output component is connected with the slipping component; wherein

The slipping assembly at least comprises a first rotating body and a second rotating body which are coaxially matched and suitable for relatively rotating;

the second rotating body is connected with the output gear, and the first rotating body is connected with the power output assembly.

In the preferred embodiment of the present invention, a track groove is recessed around the center of the first rotating body at the end surface of the first rotating body facing the second rotating body, and the circumferential groove wall of the track groove is a plurality of ratchet teeth distributed in a continuous arrangement; and

the second rotating body comprises an upper fluted disc and a pawl disc, wherein the upper fluted disc is fixedly connected with the pawl disc, the pawl disc is suitable for being embedded in the track groove, and a plurality of pawls suitable for being abutted to the ratchets are arranged on the circumferential side wall of the pawl disc at intervals around the center of the pawl disc; the pawl disc is also provided with a plurality of arc-shaped hollow grooves which are respectively in one-to-one correspondence with the pawls and are suitable for realizing the deformation of the pawls under the extrusion of the ratchets, and the arc-shaped hollow grooves are communicated with the circumferential side edge of the pawl disc; i.e. when the pawl is deformed by the ratchet pressure, the second rotation body is adapted to swivel relative to the first rotation body.

In a preferred embodiment of the present invention, a hollow cylindrical fitting portion is convexly provided at the center of the end surface of the first rotating body facing the second rotating body; and

the end face, facing the first rotating body, of the pawl disc is provided with a cylindrical matching hole suitable for being matched with the cylindrical matching part, namely the first rotating body and the second rotating body are coaxially matched through matching of the cylindrical matching part and the cylindrical matching hole.

In a preferred embodiment of the present invention, the power output assembly includes a power generating portion and a reduction gear assembly connected to the power generating portion;

the power generation part comprises a motor and a worm fixedly connected with the motor;

the reduction gear assembly comprises a power gear connected with the worm and a transmission gear connected with at least one stage of transmission connected with the power gear;

and a tooth-shaped part which is suitable for being meshed and connected with the output gear is arranged on the side end surface of the rack which is contacted with the output gear.

In a preferred embodiment of the present invention, the door opening and closing mechanism further includes a micro switch set adapted to abut against a side end of the rack away from the reduction gear assembly;

the micro switch group comprises a first micro switch and a second micro switch which are arranged side by side; wherein

And the transmission elements of the first micro switch and the second micro switch are abutted to the rack.

In a preferred embodiment of the present invention, a protruding portion is integrally formed on each of the head portion and the tail portion of the rack adapted to abut against the side end surfaces of the first micro switch and the second micro switch;

the convex part at the head part of the side end face of the rack is suitable for abutting against the transmission element of the first microswitch, and the convex part at the tail part of the side end face of the rack is suitable for abutting against the transmission element of the second microswitch.

In a preferred embodiment of the present invention, the door opening and closing mechanism further comprises an outer housing adapted to form a housing accommodating the rack, the reduction gear assembly, the slip assembly and the power take-off assembly;

the outer shell comprises a lower shell body and an upper cover body, wherein an accommodating cavity is formed in the lower shell body;

the lower shell and the upper cover body are suitable for being connected in a buckling and matching mode.

In a preferred embodiment of the present invention, a pair of guide rails adapted to guide the movement of the rack is provided on the upper cover body along the movement direction of the rack; namely, a pair of guide rails forms a movable interval of rack movement;

and a convex block which is suitable for stopping the tail end of the rack from being separated from the guide rail is arranged at the end part of the guide rail, which is close to the reduction gear set.

In a preferred embodiment of the present invention, an opening adapted to the rack bar to extend out is provided on the side wall of the lower housing; and

a lug which is suitable for limiting the movement direction of the rack is convexly arranged on the end surface of the lower shell facing the upper cover body and close to the opening; and correspondingly, a concave pit suitable for being matched with the convex block is arranged on the end surface of the rack facing to the lower shell.

In a preferred embodiment of the present invention, a pair of barbs adapted to be hooked and connected to the tail portion of the rack are provided in the lower housing at a portion away from the opening;

a spring piece suitable for compression deformation is arranged between the side end face of the pair of the barbs and the inner wall of the lower shell.

The utility model discloses dish washer realizes like this:

a dishwasher comprises the door opening and closing mechanism.

By adopting the technical scheme, the utility model discloses following beneficial effect has: the utility model discloses a dish washer of switch door mechanism and use this switch door mechanism, because the subassembly that skids of switch door mechanism does not directly mesh with the rack mutually, consequently the external force that receives of the condition of direct engagement rack among the prior art is less relatively, require also little to the moment of skidding like this, also can reduction in production cost like this, and can confirm easily to the moment of skidding under the less condition of moment of skidding requirement, when meeting external force backstep, the subassembly that skids can normally work, thereby avoid the motor to turn over and produce the electric current and then cause the condition of damage to control circuit and take place.

Drawings

Fig. 1 is a schematic view of the overall structure of the door opening mechanism of the present invention;

fig. 2 is an exploded view of the door opening mechanism of the present invention;

fig. 3 is a schematic view of the lower housing of the door opening mechanism and the interior thereof;

fig. 4 is a schematic view of the upper cover body of the door opening mechanism and the interior thereof;

fig. 5a is a schematic view of the door opening mechanism of the present invention in a state where the rack is fully extended;

FIG. 5b is an enlarged view of the portion C of FIG. 5 a;

fig. 6a is a schematic view of a first viewing angle surface of an upper cover body of the door opening mechanism of the present invention;

fig. 6b is a schematic view of a second viewing angle surface of the upper cover body of the door opening mechanism of the present invention;

fig. 7 is a schematic view of the lower housing of the door opening mechanism of the present invention;

fig. 8 is a schematic view of the tail portion of the rack of the door opening mechanism of the present invention and the mating portion of the lower housing;

fig. 9a is a schematic view of a sliding assembly of the door opening mechanism of the present invention;

fig. 9b is a schematic view of the first rotating body of the sliding assembly of the door opening mechanism of the present invention;

fig. 9c is a schematic view of a second rotating body of the sliding assembly of the door opening mechanism of the present invention;

fig. 10 is a schematic view of the engagement between the rack of the door opening mechanism and the micro switch in the fully retracted state;

fig. 11 is a schematic view of the rack of the door opening mechanism cooperating with the micro switch in a fully extended state.

In the figure: the gear rack comprises a gear rack 1, a first rotating body 2, a motor 3, a worm 4, an output gear 5, a track groove 6, a ratchet 7, an upper fluted disc 8, a pawl disc 9, a pawl 10, an arc-shaped hollow groove 11, a cylindrical matching part 12, a cylindrical matching hole 14, a bolt 15, a first micro switch A, a second micro switch B, a transmission element 16, a clamping groove 18, a buckle 19, a guide rail 20, a convex block 21, a square pit 22, a protrusion 23, a square small protrusion 25, an opening 30, a protrusion 31, a barb 34, a spring leaf 32, a rectangular small protrusion 36, a small stop 37, a clamping groove 38, a clamping hook 39 and a wiring terminal 41.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

Example 1:

referring to fig. 1 to 11, the present embodiment provides a door opening and closing mechanism, including: the device comprises a rack 1, an output gear 5 with one end connected with the rack 1, a slipping component connected with the other end of the output gear 5, and a power output component connected with the slipping component; wherein the slip assembly comprises at least a first rotating body 2 and a second rotating body which are coaxially matched and are suitable for relatively rotating; the second rotation body is connected to the output gear 5, while the first rotation body 2 is connected to the power take-off assembly. The relative rotation between the first rotation body 2 and the second rotation body can be a clockwise rotation or a counterclockwise rotation. It should be noted that, the output gear 5 may be replaced by a worm, and the present embodiment is only an example of the output gear 5 in conjunction with the drawings, and is not to be considered as an absolute limitation.

Taking an alternative embodiment as an example in connection with the drawings of the embodiment, the power output assembly comprises a power generation part and a reduction gear assembly connected with the power generation part. The power generation part comprises a motor 3 and a worm 4 fixedly connected with the motor 3. The worm 4 has a self-locking function, and when the slipping assembly breaks down, the motor 3 can be prevented from generating current due to external force reversal, and damage to a circuit system is avoided. The reduction gear assembly comprises a power gear 13 connected with the worm 4 and a transmission gear 17 connected with at least one stage of transmission connected with the power gear 13; a tooth-shaped part M suitable for being meshed and connected with the output gear 5 is arranged on the side end surface of the rack 1 contacted with the output gear 5.

It should be noted that the reduction gear assembly of the present embodiment may be a plurality of transmission gears that are meshed and connected, or may be a planetary reduction mechanism structure that is integrated with the power generation unit, and this embodiment is not limited in any way.

This is achieved for the relative rotation between the second rotation body and the first rotation body 2: an orbit groove 6 is recessed around the center of the first rotating body 2 at the end surface of the first rotating body 2 facing the second rotating body, and the circumferential groove wall of the orbit groove 6 is a plurality of ratchet teeth 7 which are continuously distributed in an array way. The second rotating body comprises an upper toothed disc 8 and a pawl disc 9 which are fixedly connected and are suitable for being embedded in the track groove 6, wherein the fixedly connecting between the upper toothed disc 8 and the pawl disc 9 can be of an integrated structure. A plurality of pawls 10 adapted to abut against the ratchet teeth 7 are provided at intervals around the center of the pawl plate 9 at a circumferential side wall of the pawl plate 9; the pawl disc 9 is further provided with a plurality of arc-shaped hollowed-out grooves 11 which are respectively in one-to-one correspondence with the plurality of pawls 10 and are suitable for realizing the deformation of the pawls 10 under the extrusion of the ratchets 7, the arc-shaped hollowed-out grooves 11 are communicated with the circumferential side edge of the pawl disc 9, namely, the circumferential side edge of the pawl disc 9 is provided with a gap which is used for being communicated with the arc-shaped hollowed-out grooves 11, so that the pawls 10 can realize the extrusion transformation of the pawls 10 by utilizing the hollowed-out grooves provided by the arc-shaped hollowed-out grooves 11 under the extrusion action of the ratchets; the second rotation body is adapted to swivel relative to the first rotation body 2 when the pawls 10 are deformed under the pressing of the ratchet teeth 7.

As for the specific matching structure between the first rotating body 2 and the second rotating body, in an alternative embodiment, a hollow cylindrical matching part 12 is convexly arranged at the center of the end surface of the first rotating body 2 facing the second rotating body; and a cylindrical matching hole 14 suitable for matching with the cylindrical matching part 12 is arranged on the end face, facing the first rotating body 2, of the pawl disc 9, and the cylindrical matching hole 14 is also of a hollow structure, namely the coaxial matching of the first rotating body 2 and the second rotating body is realized through the matching of the cylindrical matching part 12 and the cylindrical matching hole 14. It should be noted here that, for the engagement between the cylindrical engagement portion 12 and the cylindrical engagement hole 14, which is a relatively rotatable engagement relationship, the relative rotation is generated only when the second rotating body rotates relative to the first rotating body 2, i.e., when the slip assembly slips, the slip assembly does not normally perform the slip motion, but only when the transmission function between the reduction gear assembly and the power output assembly is performed, the second rotating body rotates synchronously with the first rotating body 2. That is to say, the sliding component plays a transmission role when the door opening and closing mechanism operates normally. When the system is interfered by external force and the door opening and closing mechanism cannot normally operate, the motor 3 is locked, the detection system detects the locked current of the motor 3, and the system is directly powered off. When the system is accelerated by external force (door is closed and opened), the slipping component can slip forwards or backwards, so that the whole power output component is not damaged, and the functional integrity of the power output component is protected.

In summary, for the sliding assembly of the present embodiment, the relative rotation between the second rotating body and the first rotating body 2 is realized by the cooperation of the pawls 10 and the ratchet teeth 7, the overall structure is simple, the assembly is easy, and the production cost is low.

When the door opening and closing mechanism is applied to a dishwasher, for example but not limited to, one end of the rack 1 is connected with the door, and the embodiment defines that one end of the rack 1, which is used for connecting the door, is a head end, and one end of the rack 1, which is far away from the door, is a tail end; the head end of the rack 1 is provided with a bolt 15 which is used for connecting with a machine door hook. Namely, the rack 1 realizes the opening and the closing of the machine door respectively when the stretching and the retracting movement relative to the output gear 5 are realized under the action of the output gear 5.

In order to acquire different moving positions of the rack 1 in the door opening and closing process, particularly two extreme positions of the rack 1, one extreme position is that the machine door is completely opened in place, and the other extreme position is that the machine door is completely closed in place, the door opening and closing mechanism of the embodiment further comprises a micro switch group which is suitable for being abutted against one side end of the rack 1, which is far away from the reduction gear assembly; the micro-gap switch group includes two first micro-gap switch A and the second micro-gap switch B that set up side by side, and first micro-gap switch A and second micro-gap switch B's transmission element all with rack 1 butt in order to be used for gathering the concrete position of rack 1 that corresponds under above-mentioned two extreme position respectively.

In view of detecting the two extreme positions of the tooth movement, the present embodiment integrally forms bosses 50 at the head and tail portions of the rack 1 adapted to abut against the side end surfaces of the first and second micro switches a and B, respectively; the boss 50 located at the head of the side end face of the rack 1 is adapted to press against the transmission element of the first microswitch a, while the boss 50 located at the tail of the side end face of the rack 1 is adapted to press against the transmission element of the second microswitch B. That is to say at the side end face that rack 1 deviates from the profile of tooth portion, first micro-gap switch A and second micro-gap switch B can not triggered when not contacting boss 50, just can not send position signal yet, and only boss 50 triggers the touching element of first micro-gap switch A and second micro-gap switch B just can make first micro-gap switch A and second micro-gap switch B send corresponding position signal.

It should be noted that, the first microswitch a and the second microswitch B of the present embodiment may also be equivalently replaced by sensing components such as hall elements, and the first microswitch a and the second microswitch B are merely exemplified in the present embodiment and are not considered to be absolutely limited.

In addition, it should be specified that the door opening and closing mechanism further comprises an outer casing adapted to form a housing for the rack 1, the reduction gear assembly, the skid assembly and the power take-off assembly; the outer shell comprises a lower shell 45 with a containing cavity and an upper cover body 43 suitable for covering the lower shell 45; the lower housing 45 and the upper cover 43 are adapted to be connected by a snap fit, for example, but not limited to, the upper cover 43 is provided with a slot 18, and the lower housing 45 is provided with a snap 19. Of course, the lower housing 45 and the upper housing 43 may be fastened and coupled by screws, and this embodiment is not limited to this.

In particular, a pair of guide rails 20 adapted to guide the movement of the rack 1 are provided on the upper cover body 43 along the movement direction of the rack 1; namely, an active interval of the movement of the rack 1 is formed by the pair of guide rails 20, and such an active interval forms a 'runway' for the movement of the rack 1, so that the rack 1 is not easy to generate a deviation phenomenon during the movement. A bump 21 adapted to stop the rear end of the rack 1 from being separated from the guide rail 20 is provided at the end of the guide rail 20 adjacent to the reduction gear set.

In more detail, the upper cover 43 has a plurality of square pits 22 (corresponding to the opposite protrusions) on the surface facing away from the lower cover 45, and the square pits 22 can better solve the problem of surface flatness. Secondly, a number of small structures are designed on the end surface of the upper cover 43 facing the lower housing 45 for cooperating with structures inside the lower housing 45, such as a reduction gear assembly and a slip assembly. Furthermore, the end surface of the upper cover 43 facing the lower cover 45 is further provided with 2 rectangular protrusions 23 and four small square protrusions 25, wherein the rectangular protrusions 23 are matched with the surface of the motor 3 to limit the up-and-down movement of the motor 3. The four small square bulges 25 are matched with the surface of the microswitch to limit the up-and-down movement of the microswitch. In addition, the end face of the upper cover body 43 facing the lower cover body 45 is also provided with 4 shaft holes 26, metal shafts are arranged in the shaft holes and matched with the gear of the reduction gear assembly and the sliding assembly, and meanwhile, the shaft holes are matched with small round bosses on the upper surface of the gear, a little gap is reserved, the normal operation of the gear is ensured, and the up-and-down movement of the gear is limited. Finally, the upper cover 43 is also provided with a buckle which is matched with the small salient point on the lower cover 45 to keep fixing.

It should be noted that, with respect to the lower case 45, first, the opening 30 adapted to extend the rack 1 is provided in the side wall of the lower case 45; a bump 31 which is suitable for limiting the movement direction of the rack 1 is convexly arranged on the end surface of the lower shell 45 facing the upper cover body 43 and close to the opening; correspondingly, recesses (not shown) are provided in the end face of the toothed rack 1 facing the lower housing 45, which recesses are adapted to cooperate with the projections 31.

Secondly, a pair of barbs 34 suitable for being hooked and connected with the tail part of the rack 1 are arranged on the part, far away from the opening, in the lower shell 45; a spring piece 32 suitable for compression deformation is arranged between the side end face of the pair of barbs 34 and the inner wall of the lower shell 45, so that the barbs 31 have certain elasticity to ensure the matching with the rack 1. Specifically, the two spring pieces 32 are arranged at the tail part of the lower shell 45, so that the barb 31 at the tail part of the lower shell 45 has certain elasticity, the barb 31 and the tail part of the rack 1 are mutually matched through inclined planes in an ejecting manner, the sliding-in and sliding-out can be realized, and the reduction gear assembly is matched with the locking rack 1.

In addition, the inner side of the lower housing 45 is provided with a number of small structures to fit the components mounted thereon. For example, referring to fig. 3 and 8, a space X (for connecting the motor 3 and the microswitch) for installing a terminal is provided at the leftmost side. And the right side is the place Y for installing the motor 3, and the motor 3 is ensured to be fixed by adopting line-surface matching. The surface is equipped with 4 shaft holes 35, installation metal axle in the shaft hole 35, metal axle and gear cooperation, and the upper surface in shaft hole 35 and the cooperation of the little protruding round platform of gear bottom play the supporting role simultaneously. And micro switches are arranged on two small rectangular bosses 36 on the side and are matched with the side of the rack 1 for determining the moving position of the rack 1 and sending signals outwards. The edge is provided with a small stop block 37 for ensuring that the connecting wire is clamped in the wiring groove and does not overflow outwards. The upper part of the right side is provided with a clamping groove 38 which is matched with a clamping hook 39 of the upper cover body 43 to keep the whole stability, and the upper side and the lower side of the left side are also provided with an embedding groove 48 which is matched with a clamping block 49 of the upper cover body 43 to play a positioning role. The edge is provided with a buckle 19 which is matched with the clamping groove 18 on the edge of the upper cover body 43 and used for locking the upper cover and preventing the upper cover from falling off.

As shown in fig. 2, 3 and 4, the connection terminal 41 is installed on the left side of the lower housing 45, and is connected with the inside and the outside of the housing in cooperation with a wire, and is responsible for signal transmission.

The specific operating principle for the door opening and closing mechanism of the present embodiment when used in a dishwasher is as follows:

the door opening and closing mechanism is integrally arranged on the surface of the upper shell of the dish washing machine, the rack 1 is connected with a lock catch inside the machine door, and the motor 3 drives the rack 1 to stretch out and return to realize pushing and pulling the machine door. The user transmits the door opening instruction through the induction element on the dishwasher body, the circuit is electrified, and the dish washing starts. After the work of washing the dishes is ended, motor 3 receives the signal and begins the operation, drives 1 outwards movements of rack through reduction gear assembly, reaches the position of opening the door of setting for, and the machine door can suspend at that period, carries out the work of the heat dissipation of exhausting, waits for the setting time to pass, and the machine door can self-closing, keeps the chamber of washing the dishes clean and tidy. When the dish washing work is finished, the mechanism has three working states of opening, stopping and closing the door.

As shown in fig. 10, the position at this point is the fully closed position, i.e., the locked position. At the moment, the first microswitch A is pressed by the bulge part of the head part of the side end surface of the rack 1, and the second microswitch B is in a relaxed state.

When the work of washing the dishes is accomplished, the motor 3 circular telegram operation, rack 1 outside motion, first micro-gap switch A and second micro-gap switch B all are in the state of relaxing this moment, and motor 3 lasts the operation, is in the state of opening the door.

When the rack 1 moves to the full-open position, as shown in fig. 11, the second microswitch B is in contact with the protruding portion of the tail portion of the side end face of the rack 1, the second microswitch B is in a pressed state, and the first microswitch a is in a relaxed state. The second microswitch B sends a signal to the control circuit, the motor 3 stops running, and the door opening is finished. According to the preset time, the machine door stays at the side for a period of time, and heat dissipation and exhaust are started. After the set time is up, the motor 3 rotates reversely to drive the door to return, and the state shown in fig. 11 is reached, and the door is closed. So as to prevent foreign matters from entering the cavity and ensure the cleanness of the cavity. The above is the action that the dishwasher completes by itself in the state that the user is not beside.

After the complete door opening state is achieved, the user continues to pull the door outwards, the bolt 15 at the head end of the rack 1 is separated from the door lock hook, an inductor in the door is triggered, the circuit is powered on, the motor 3 rotates reversely to drive the rack 1 to move back, when the rack moves to the position shown in fig. 11, a signal is sent to the control circuit, the rack 1 reaches the designated position, and the circuit is powered off. After the user can take or put the bowl dish that will wash well, close the quick-witted door, the action is locked to 1 spring bolt 15 of rack and quick-witted door latch hook completion of quick-witted door, and sensor sends the signal in the quick-witted door, and the quick-witted door is accomplished and is locked, selects required function by the user again, decides whether dish washer can begin work.

When the locomotive runs into and hinders and can't close or open, the direct detection motor 3 locked rotor electric current, the system outage, when the locomotive opened the door or closed the door with higher speed under the exogenic action, the subassembly that skids begins to skid, is favorable to prolonging the life-span of the subassembly that skids like this.

Example 2:

on the basis of the door opening and closing mechanism of embodiment 1, the present embodiment provides a dishwasher including the door opening and closing mechanism of embodiment 1.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the mechanism or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Claims

1. A door opening and closing mechanism, comprising: the device comprises a rack, an output gear, a slipping component and a power output component, wherein one end of the output gear is connected with the rack, the slipping component is connected with the other end of the output gear, and the power output component is connected with the slipping component; wherein

2. The door opening and closing mechanism according to claim 1, wherein a track groove is recessed around the center of the first rotating body at the end surface of the first rotating body facing the second rotating body, and the circumferential groove wall of the track groove is a plurality of ratchet teeth which are continuously distributed in an array manner; and

3. The door opening and closing mechanism according to claim 2, wherein a hollow cylindrical fitting portion is convexly provided at the center of an end surface of the first rotating body facing the second rotating body; and

4. The door opening and closing mechanism according to claim 1, wherein the power output assembly includes a power generation portion and a reduction gear assembly connected to the power generation portion;

5. The door opening and closing mechanism according to claim 1, further comprising a micro switch group adapted to abut with a side end of said rack bar facing away from said reduction gear assembly;

6. The switch door mechanism according to claim 5, wherein a boss is integrally formed at a head portion and a tail portion of the rack adapted to abut against side end surfaces of the first and second micro switches, respectively;

7. The opening and closing mechanism according to claim 1, further comprising an outer housing adapted to form a housing accommodating the rack gear, the reduction gear assembly, the skid assembly and the power take-off assembly;

8. The door opening and closing mechanism according to claim 7, wherein a pair of guide rails adapted to guide the movement of the rack are provided on the upper cover body in the movement direction of the rack; namely, a pair of guide rails forms a movable interval of rack movement;

9. The door opening and closing mechanism according to any one of claims 7 or 8, wherein an opening adapted to the rack gear to protrude is provided at a side wall of the lower housing; and

10. The door opening and closing mechanism according to claim 9, wherein a pair of barbs adapted to be hooked and connected to a tail portion of the rack are provided in a portion of the lower housing remote from the opening;

11. A dishwasher, comprising the door opening and closing mechanism according to any one of claims 1 to 10.