CN108842388B

CN108842388B - Push-pull mechanism and electrical apparatus

Info

Publication number: CN108842388B
Application number: CN201810847254.5A
Authority: CN
Inventors: 乔坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-07-27
Filing date: 2018-07-27
Publication date: 2024-03-01
Anticipated expiration: 2038-07-27
Also published as: CN108842388A

Abstract

The invention belongs to the technical field of household appliances, and particularly discloses a push-pull mechanism and an electric appliance with the push-pull mechanism. Wherein, push-and-pull mechanism includes: the push-pull executing mechanism comprises a push-pull piece and a push-pull driving assembly which are arranged separately; the push-pull clutch mechanism is connected with the push-pull driving assembly and can drive the push-pull driving assembly to move between a first position and a second position, when the push-pull driving assembly is positioned at the first position, the push-pull driving assembly can be contacted with the push-pull piece and drive the push-pull piece to move, and when the push-pull driving assembly is positioned at the second position, the push-pull driving assembly cannot be contacted with the push-pull piece. The push-pull mechanism disclosed by the invention can enable an electric appliance with the push-pull mechanism to be compatible with automatic door opening and closing operation and manual door opening and closing operation, can improve the reliability and service life of the electric appliance, and has good user experience.

Description

Push-pull mechanism and electrical apparatus

Technical Field

The invention relates to the technical field of household appliances, in particular to a push-pull mechanism and an electric appliance.

Background

The washing machine is used as a necessary household appliance for most families, has the functions of washing, drying or deodorizing clothes, towels, sheets and other clothes, saves labor force for users, and improves the life quality of the users.

The prior art discloses a drum washing machine and a control method thereof, wherein the drum washing machine comprises a shell, an opening is arranged on the shell, a door body is arranged at the opening, one side of the door body is hinged with the shell through a hinge, a door hook is fixed on the other side of the door body, a groove is arranged on the shell corresponding to the door hook, the drum washing machine further comprises a first driving mechanism and a second driving mechanism, the first driving mechanism can drive the door hook to move in a direction far away from or close to the groove, and the second driving mechanism can drive the door body to rotate in a direction of opening or closing the door. The first driving mechanism comprises a first rotating motor, a gear and a rack, the first rotating motor is fixed on the shell, the gear is sleeved on an output shaft of the first rotating motor, the rack is arranged on the door hook, the first rotating motor rotates to drive the gear to rotate, the gear is driven to move in a direction close to or far away from the groove by rotation of the gear, and accordingly the door hook is driven to move in a direction close to or far away from the groove.

The drum washing machine provided by the prior art can realize automatic door opening and door closing of the washing machine to a certain extent, when the door body is in a closed state, the gear and the rack are in an engaged state, at the moment, if a user wants to manually open the door body, the gear and the rack are in the engaged state, the door body can be blocked for the user to open, the use experience of the user is reduced, and if the user forcibly opens, the non-engaged relative movement between the gear and the rack can cause the phenomena of abrasion and the like of the gear and the rack, so that the accuracy and the stability of the engaged transmission of the gear and the rack are affected; when the door body is in an open state, when the door body is used for being manually closed, the door body rotates around the hinge shaft, when the door body is closed and rotates to a certain position, the gear can be contacted with the rack to prevent the door body from being continuously closed, the manual closing operation of a user is influenced, and if the user adopts forced closing, the gear and the rack are damaged, the use experience of the user is influenced, and the reliability and the service life of the mechanism are reduced

Disclosure of Invention

The invention aims to provide a push-pull mechanism, which enables door opening and closing equipment driving the push-pull mechanism to automatically open and close a door or manually open and close a door by a user, improves the use experience of the user, and improves the operation reliability and service life of the push-pull mechanism.

Another object of the present invention is to provide an electric appliance, which is compatible with the execution of automatic door opening and closing and manual door opening and closing, improving the convenience of door opening and closing of the electric appliance, and the reliability and service life of the door opening and closing device of the electric appliance.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

a push-pull mechanism comprising:

the push-pull executing mechanism comprises a push-pull piece and a push-pull driving assembly which are arranged separately;

the push-pull clutch mechanism is connected with the push-pull driving assembly and can drive the push-pull driving assembly to move between a first position and a second position, when the push-pull driving assembly is positioned at the first position, the push-pull driving assembly can be contacted with the push-pull piece and drive the push-pull piece to move, and when the push-pull driving assembly is positioned at the second position, the push-pull driving assembly cannot be contacted with the push-pull piece.

Further, the push-pull clutch mechanism includes:

the sliding box body is connected with the push-pull driving assembly;

and the clutch driving assembly is connected with the sliding box body and can drive the sliding box body to move.

Further, the clutch driving assembly includes:

a clutch output rack;

a clutch driving motor;

one end of the clutch gear set is connected with the output shaft of the clutch driving motor, the other end of the clutch gear set is meshed with the clutch output racks, and one of the clutch gear set and the clutch output racks is fixedly connected with the sliding box body.

Further, the clutch driving motor and the clutch gear set are fixedly connected with the sliding box body, and the sliding box body is in sliding connection with the clutch output rack.

Further, the push-pull clutch mechanism further comprises:

the fixed box body, sliding box body sliding connection is in the fixed box body, separation and reunion output rack with fixed box body is connected.

Further, the clutch output rack is in sliding connection with the fixed box body, one end of the clutch output rack, which is far away from the push-pull driving assembly, is connected with one end of a first elastic element, the other end of the first elastic element is connected with the fixed box body, and the expansion direction of the first elastic element is the same as the length direction of the clutch output rack.

Further, the clutch gear set includes:

the clutch worm is connected with an output shaft of the clutch driving motor;

a first clutch gear engaged with the clutch worm;

and the second clutch gear is respectively meshed with the first clutch gear and the clutch output rack.

Further, the push-pull clutch mechanism further comprises a disengagement assembly comprising:

the locking pressing plate comprises a first plate and a second plate which are connected with each other, wherein a preset included angle is formed between the first plate and the second plate, the lower surface of the first plate is abutted to the upper end surface of the first clutch gear, and the joint of the first plate and the second plate is rotationally connected with the sliding box body;

one end of the second elastic element is connected with the lower end of the first clutch gear, and the other end of the second elastic element is connected with the bottom plate of the sliding box body;

and one end of the pull rope is connected with the second plate, and the other end of the pull rope extends out of the outer side of the sliding box body.

Further, the push-pull drive assembly includes:

the push-pull output piece can be connected with the push-pull piece and drive the push-pull piece to move;

and an output shaft of the push-pull driving motor is connected with the push-pull output piece and can drive the push-pull output piece to rotate.

Further, the push-pull output piece is a push-pull worm, and the push-pull piece is a worm master strip;

or, the push-pull output piece is a screw rod, and the push-pull piece is a deformation nut.

The electric appliance comprises a door body and a shell, wherein one side of the door body is hinged with the shell, and the electric appliance is characterized by comprising the push-pull mechanism, the push-pull piece is arranged on the other side of the door body, and the push-pull driving assembly and the push-pull clutch mechanism are both arranged on the shell.

Further, the push-pull driving assembly and the push-pull clutch mechanism are arranged on the inner side of the shell, and push-pull perforations are formed in the position, corresponding to the push-pull piece, of the shell.

The invention has the beneficial effects that:

according to the push-pull mechanism and the electrical appliance, as the push-pull driving assembly in the push-pull mechanism is provided with the first position and the second position, when the push-pull driving assembly is in the first position, the push-pull driving assembly can be connected with the push-pull piece and drive the door body to move along the direction approaching or separating from the shell, so that the electrical appliance can automatically open and close the door; when in the second position, the push-pull driving assembly cannot be in contact with the push-pull member, so that the arrangement of the push-pull member and the push-pull driving assembly cannot obstruct the manual door opening and closing action of a user, and meanwhile, the impact on the push-pull mechanism caused by the manual door opening and closing action of the user is avoided, the electric appliance with the push-pull mechanism can be compatible with the execution of the automatic door opening and closing and the manual door opening and closing of the user, and meanwhile, the operation reliability and the operation service life of the push-pull mechanism are improved.

Drawings

Fig. 1 is a schematic structural diagram of an electric appliance in a door-closed state according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an electric appliance in a door-open state according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the inner side of an electrical appliance casing according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a split structure of a push-pull mechanism according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a push-pull mechanism according to an embodiment of the present invention in a first position;

fig. 6 is a schematic structural diagram of a disengagement assembly according to an embodiment of the present invention.

1-a housing; 11-opening;

2-door body;

3-door locks;

4-a push-pull executing mechanism; 41-push-pull member; 42-push-pull drive assembly; 421-push-pull driving motor; 422-push-pull output member; 423-push-pull worm; 424-push-pull drive gear; 43-push-pull output gear; 44-mounting plate;

5-a push-pull clutch mechanism; 51-sliding box; 511-a dodge opening; 52-fixing the box body; 53-a clutch drive assembly; 531-clutch drive motor; 532—a clutch worm; 533—a first clutch gear; 534-a second clutch gear; 535-clutching the output rack; 536-a first resilient element; 54-a disengagement assembly; 541-pulling ropes; 542-locking the platen; 543-a second elastic element; 544-limit columns; 545-a rotation shaft; 546-connecting brackets; 55-a main control board; 56-a cover;

61-a first stop assembly; 611-a first limiting block; 612—a first limit switch; 62-a second stop assembly; 621-a second limiting block; 622-a second limit switch; 63-a third limit switch;

7-a rotation mechanism.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

Fig. 1 is a schematic structural view of an electric appliance in a door-closed state provided by the present embodiment, and fig. 2 is a schematic structural view of an electric appliance in a door-open state provided by the present embodiment, as shown in fig. 1 and fig. 2, the present embodiment provides an electric appliance, which includes a housing 1, and an opening 11 is provided at one side of the housing 1; a door body 2, one side of which is rotatably connected to the housing 1 through a door hinge shaft 21 and is rotatable with respect to the housing 1 to open or close the opening 11; a door lock 3 arranged at one side of the door body 2 far from the door hinge shaft 21 for locking the door body 2 and the housing 1 relatively; the rotating mechanism 7 is connected with the door hinge shaft 21 and can drive the door body 2 to rotate around the axis of the door hinge shaft 21; the push-pull mechanism acts on the door body 2, so that the door body 2 overcomes the door opening or closing resistance of the door lock 3, and the auxiliary rotating mechanism 7 performs automatic door opening and closing actions of the door body 2.

In this embodiment, the electrical appliance is taken as a washing machine for example to describe the push-pull mechanism in detail, and in other embodiments, the electrical appliance may also be other devices with a door opening and closing function, such as a dryer, a dishwasher, etc.

The push-pull mechanism comprises a push-pull executing mechanism 4 and a push-pull clutch mechanism 5. The push-pull executing mechanism 4 comprises a push-pull member 41 arranged on the door body 2 and a push-pull driving assembly 42 arranged on the shell 1, and the push-pull driving assembly 42 can drive the push-pull member 41 to move in a direction away from the shell 1 or close to the shell 1, so that automatic door opening and closing actions of the washing machine are realized. In the use process of the washing machine, a user can select the automatic door opening and closing or the manual door opening and closing of the washing machine according to the situation, in order to avoid the contact between the push-pull member 41 and the push-pull driving assembly 42 in the push-pull executing mechanism 4 to influence the execution of the manual door opening and closing and reduce the use experience of the user, in this embodiment, the washing machine shell 1 is further provided with a push-pull clutch mechanism 5, the push-pull clutch mechanism 5 is connected with the push-pull driving assembly 42 and can drive the push-pull driving assembly 42 to slide between a first position and a second position of the shell 1, and when the push-pull driving assembly 42 is located at the first position, the push-pull driving assembly 42 can contact with the push-pull member 41 and drive the push-pull member 41 to move towards or away from the shell 1; when the push-pull driving assembly 42 is located at the second position, the push-pull driving assembly 42 is not in contact with the push-pull member 41, so that a user can conveniently and manually open and close the door of the washing machine without interference of the push-pull executing mechanism 4.

In this embodiment, when the user needs the washing machine to perform the automatic door opening and closing action, the push-pull clutch mechanism 5 drives the push-pull driving assembly 42 to the first position, so that the push-pull driving assembly 42 contacts with the push-pull member 41 and drives the push-pull member 41 to move; after the automatic door opening and closing action is completed, the push-pull clutch mechanism 5 drives the push-pull driving assembly 42 to return to the second position, and the push-pull driving assembly 42 is not contacted with the push-pull member 41, so that the arrangement of the push-pull driving assembly 42 and the push-pull member 41 can not interfere the manual door opening and closing of a user. Therefore, the washing machine provided by the embodiment can be compatible with the execution of automatic door opening and closing of the washing machine and manual door opening and closing of a user, and has good user experience; and collision or abrasion to the push-pull actuating mechanism 4 caused in the process of manually opening and closing the door by a user is avoided, and the service life, the running stability and the accuracy of the push-pull actuating mechanism 4 are improved. Meanwhile, the push-pull actuating mechanism 4 provided by the embodiment is separated from the door lock 3, so that interference to the original structure of the door lock 3 is avoided, and the safety of the structure of the door lock 3 is ensured.

In this embodiment, the push-pull clutch mechanism 5 is provided to drive the clutch driving assembly 53 to slide between the first position and the second position of the housing 1, and in other embodiments, the push-pull driving assembly 42 may be separated from the push-pull member 41 in other manners, for example, the push-pull driving assembly 42 may be rotated relative to the housing 1, so that the push-pull driving assembly 42 is located at or away from a position contacting the push-pull member 41; alternatively, the push-pull driving unit 42 may be fixed to the housing 1, and the push-pull member 41 may be slid or rotated with respect to the door body 2, so that the push-pull member 41 is moved between a third position where the push-pull member 41 is in contact with the push-pull driving unit 42 and a fourth position where the push-pull member 41 is out of contact with the driving unit. In other embodiments, the push-pull member 41 may be disposed on the housing 1 and the push-pull drive assembly 42 may be disposed on the door 2 such that one of the door 2 or the housing 1 coupled thereto has a first position or a second position.

Fig. 3 is a schematic structural diagram of the inner side of the casing 1 of the washing machine provided in this embodiment, as shown in fig. 2 and 3, the push-pull mechanism provided in this embodiment is disposed on one side of the casing 1 far away from the door body 2, which is favorable for providing enough space for the arrangement of the push-pull mechanism, avoiding the problems of increased thickness of the casing 1 caused by the push-pull mechanism disposed on the outer side of the casing 1, and improving the overall aesthetic property of the washing machine. The casing 1 is provided with push-pull perforations corresponding to the positions of the push-pull members 41, the push-pull perforations penetrate through the inner surface and the outer surface of the casing 1, and the push-pull members 41 can penetrate through the push-pull perforations to be in contact with the push-pull driving assembly 42.

In this embodiment, the inner surface of the casing 1 refers to the surface of the casing 1 facing the inside of the washing machine, and the outer surface of the casing 1 is the surface of the casing 1 facing the door 2. Similarly, the inner side of the door body 2 refers to the side of the door body 2 facing the inside of the washing machine, and the outer side of the door body 2 refers to the side of the door body 2 facing away from the outside of the washing machine.

Specifically, fig. 4 is a schematic diagram of a split structure of the push-pull mechanism provided in this embodiment, as shown in fig. 4, the push-pull clutch mechanism 5 includes a fixed box 52, a sliding box 51 and a clutch driving assembly 53, the fixed box 52 is fixedly connected with the inner surface of the housing 1, and the connection mode may be a detachable connection mode such as threaded connection, so as to facilitate maintenance and replacement of the push-pull mechanism. The sliding box body 51 is arranged inside the fixed box body 52 and can slide relative to the fixed box body 52, for example, a sliding rail can be arranged on the upper surface of the fixed box body 52 along the sliding direction of the sliding box body 51, and a sliding groove is arranged on the sliding shell 1; or a sliding groove is formed on the fixed box 52, a sliding rail is formed on the sliding box 51, and other sliding connection modes can be adopted, so that the description of the embodiment is omitted. The sliding box body 51 is provided with the cover body 56, the sliding box body 51 and the cover body 56 are surrounded to form an accommodating space, at least part of structures of the push-pull driving assembly 42 and the push-pull clutch mechanism 5 are positioned in the accommodating space, the parts in the push-pull mechanism are protected, the sliding box body 51 and the cover body 56 adopt detachable connection modes such as screws, clamping and the like, and the installation, maintenance and replacement of parts in the push-pull mechanism are facilitated. A mounting plate for mounting and connecting the push-pull driving assembly 42 and a main control board 55 for setting a control circuit are arranged between the sliding box body 51 and the cover body 56.

The clutch driving assembly 53 is connected with the sliding box body 51, the push-pull driving assembly 42 is arranged inside the sliding box body 51, and the clutch driving assembly 53 drives the sliding box body 51 to slide so that the push-pull driving assembly 42 positioned inside the sliding box body 51 moves between a first position and a second position.

Fig. 5 is a schematic structural view of the push-pull mechanism provided in the present embodiment in the first position, and, as shown in fig. 4 and 5, the clutch driving assembly 53 includes a clutch output rack 535, a clutch driving motor 531 and a clutch gear set. The clutch driving motor 531 and the clutch gear set are fixed in the slide housing 1, and the clutch output rack 535 is provided along the movement direction of the push-pull driving assembly 42 and is slidable with respect to the slide case 51.

The clutch gear set includes a clutch worm 532, a first clutch gear 533, and a second clutch gear 534. The clutch worm 532 is fixedly sleeved on the output shaft of the clutch driving motor 531, the first clutch gear 533 comprises a clutch worm gear and a clutch gear which are coaxially arranged up and down, the clutch worm gear is meshed with the clutch worm 532, and the clutch gear is meshed with the second clutch gear 534. The second clutch gear 534 is a double gear, one of which is meshed with the clutch gear and the other of which is meshed with the clutch output rack 535. The slide box 51 is provided with a avoiding opening 511 corresponding to the clutch output rack 535, and the clutch output rack 535 is connected with the bottom of the fixed box 52 through the avoiding opening 511.

When the clutch driving motor 531 is turned on, the output shaft of the clutch driving motor 531 drives the clutch worm 532 to rotate, so that the first clutch gear 533 and the second clutch gear 534 rotate. Because the clutch driving motor 531 and the clutch gear assembly are connected with the sliding box body 51, the clutch output rack 535 is connected with the fixed box body 52, and the engagement of the second clutch gear 534 with the clutch output rack 535 causes the second clutch gear 534 to move along the length direction of the clutch output rack 535, so as to drive the sliding box body 51 to move, and the sliding box body 51 drives the push-pull driving assembly 42 to move between the first position and the second position.

In the present embodiment, when the clutch driving motor 531 rotates in the forward direction, the push-pull clutch mechanism 5 drives the push-pull driving assembly 42 to move from the second position to the first position; when the clutch driving motor 531 rotates reversely, the push-pull clutch mechanism 5 drives the push-pull driving assembly 42 to move from the first position to the second position, so as to drive the push-pull driving assembly 42 to move. In other embodiments, the direction of movement of the slide case 51 may be reversed from the arrangement of the present embodiment when the clutch driving motor 531 rotates forward and backward.

In the present embodiment, the clutch driving motor 531 and the clutch gear set are provided on the slide case 51, the clutch output rack 535 is provided on the fixed case 52, and in other embodiments, the clutch driving motor 531 and the clutch gear set may be provided on the fixed case 52, and the clutch output rack 535 may be provided on the slide case 51.

In this embodiment, the sliding box 51 is driven to rotate relative to the fixed box 52 by using the clutch driving motor 531, the clutch gear set and the clutch output rack 535, so that the push-pull clutch mechanism 5 has simple structure, smaller volume, convenient control and lower cost. In other embodiments, other manners of driving the sliding box 51 to slide relative to the fixed box 52 may be adopted, such as electromagnetic driving, driving of a screw nut by a motor, and the like.

In this embodiment, the sliding box 51 is disposed inside the fixed box 52, and the push-pull driving assembly 42 and the push-pull clutch mechanism 5 are disposed inside the fixed box 52, which is beneficial to the overall installation, maintenance and replacement of the push-pull mechanism, and reduces the connection interface of the push-pull mechanism on the housing 1. In other embodiments, the fixed portion of the push-pull clutch mechanism 5 may be directly disposed on the housing 1, and the moving portion may be disposed on the sliding box 51 or the sliding plate.

As shown in fig. 5, the push-pull drive assembly 42 includes a push-pull output 422, a push-pull drive motor 421, and a push-pull gear set. The push-pull gear set comprises a push-pull worm 423 and a push-pull transmission gear 424, and the push-pull transmission gear 424 comprises a push-pull worm wheel and a push-pull gear which are coaxially arranged. The push-pull worm 423 is sleeved on the push-pull driving motor 421, and the push-pull worm wheel is meshed with the push-pull worm 423. The rotating shaft 545 of the push-pull output piece 422 is fixedly sleeved with a push-pull output gear 43, and the push-pull output gear 43 is meshed with the push-pull gear.

In this embodiment, the push-pull output member 422 is a worm, the push-pull member 41 is a worm bar, and when the worm bar contacts with the worm, the worm is meshed with the worm bar, and the push-pull driving motor 421 drives the worm to rotate through the push-pull gear set, so as to drive the worm bar to move in a direction approaching or separating from the housing 1.

In this embodiment, when the push-pull driving motor 421 rotates forward, the worm drives the worm bar to move in a direction approaching to the housing 1; when the push-pull driving motor 421 is reversed, the worm drives the worm bar to move in a direction away from the housing 1. In other embodiments, the movement of the scroll bar may be opposite to the direction set by the present embodiment when the push-pull driving motor 421 is rotated forward and backward.

In this embodiment, the push-pull output member 422 is a worm, the push-pull member 41 is a worm rack, and the worm rack is preferably a rectangular tooth, so that the radial force in the transmission process of the worm rack can be reduced, the axial thrust of the worm rack transmission can be increased, and the transmission efficiency and stability can be improved. In other embodiments, the push-pull output member 422 may be a screw rod, and the push-pull member 41 may be a deformed nut, i.e., a nut bar obtained by taking 1/2-1/5 of the nut along the circumference of the long nut and expanding the nut. When the push-pull driving motor 421 drives the screw rod to rotate, the screw rod and the screw thread of the deformation nut drive the deformation nut to move towards or away from the shell 1.

The adoption of the worm strip or the deformed nut can enable the push-pull piece 41 to have enough transmission length, and can conveniently extend into the push-pull perforation to be meshed with the worm or in threaded connection with the screw rod, so that the push-pull mechanism is arranged on the inner side of the shell 1, the number of parts on the outer side of the shell 1 is reduced, the structural design of the door body 2 and the corresponding shell 1 is simplified, the door body 2 is conveniently closed and opened, and the washing machine is attractive in appearance. In other embodiments, the push-pull output member 422 and the push-pull member 41 may be other pairs of motion that cooperate with each other and convert rotational motion to linear motion.

In this embodiment, to facilitate the engagement between the push-pull member 41 and the push-pull output member 422, a push-pull through hole is provided in the housing 1, and the push-pull member 41 can extend into the push-pull through hole to engage with the push-pull output member 422, and at the same time, the push-pull output member 422 partially extends into the push-pull through hole to reduce the required length of the push-pull member 41. Since the push-pull output member 422 is movable relative to the housing 1, the width of the push-pull aperture should be greater than the travel of the push-pull output member 422, which results in the push-pull aperture being larger in size on the housing 1 than the push-pull member 41. The cover plate is arranged on the outer surface of the shell 1 at the position corresponding to the push-pull perforation and is used for covering the push-pull perforation, improving the attractive performance and the waterproof and dustproof performances of the washing machine, and the push-pull hole is formed in the position, corresponding to the extending position of the push-pull piece 41, of the cover plate.

In this embodiment, the push-pull driving motor 421 transmits the rotation speed and torque to the push-pull output member 422 through the worm, the push-pull transmission gear 424 and the push-pull output gear 43, and in other embodiments, the push-pull driving motor 421 may also transmit the rotation speed and torque through another transmission mode, for example, a multi-stage transmission gear may be provided, or the push-pull driving motor 421 may also be directly connected to the rotation shaft of the push-pull output member 422. The number of transmission gear stages and the connection mode are specifically determined according to the rotation speed and torque to be transmitted and the type of the push-pull driving motor 421.

In this embodiment, the motor is used to drive the push-pull output member 422 to rotate, which is simple in structure, convenient to control and low in cost, and in other embodiments, other forms of push-pull driving assemblies 42 can be used.

When the clutch mechanism drives the push-pull output member 422 to contact with the push-pull member 41, the initial contact position is not necessarily the engagement position, so as to assist the smooth engagement of the push-pull output member 422 and the push-pull member 41, the clutch output rack 535 is slidably disposed on the fixed box 52 and can move along the length direction of the clutch output rack 535. And one end of the clutch output rack 535 far away from the push-pull driving assembly 42 is connected with one end of the first elastic element 536, the other end of the first elastic element 536 is connected with the fixed box 52, and the extending and retracting direction of the first elastic element 536 is the same as the setting direction of the clutch output rack 535.

Because the first elastic element 536 is provided, and the clutch output rack 535 is slidably disposed on the fixed box 52, when the push-pull output member 422 and the push-pull member 41 are in a state of being in contact with the tooth top and the tooth top, the sliding box 51 cannot be driven to slide continuously by the rotation of the clutch driving motor 531, and the clutch output rack 535 is moved away from the push-pull driving assembly 42 by the meshing transmission of the second clutch gear 534 and the clutch output rack 535, so that the first elastic element 536 is compressed. Meanwhile, the push-pull output member 422 is driven to rotate by the rotation of the push-pull driving motor 421, and when the push-pull output member 422 rotates to a certain position, the push-pull output member 422 is positioned at a position engaged with the push-pull member 41. The sliding box 51 slides under the elastic force of the first elastic element 536 and the driving of the clutch driving motor 531, and drives the push-pull output member 422 to engage with the push-pull member 41. The clutch driving motor 531 continues to rotate, the slide case 51 does not slide, the clutch output rack 535 moves in a direction away from the push-pull driving assembly 42, the first elastic element continues to compress, and the clutch driving motor 531 stops rotating when the clutch output rack 535 is located at the set position with respect to the fixed housing 1.

To control the operation of the push-pull driving assembly 42 and the push-pull clutch mechanism 5, the push-pull mechanism provided in this embodiment further includes a first limiting assembly 61 and a second limiting assembly 62. The first limiting assembly 61 comprises a first limiting block 611 and a first limiting switch 612, the first limiting block 611 is arranged at one end of the clutch output rack 535, which is connected with the first elastic element 536, a main control board 55 is arranged between the sliding box body 51 and the cover body 56, the main control board 55 is fixedly connected with the sliding box body 51, and the first limiting switch 612 is arranged on the main control board 55. When the clutch output rack 535 moves relative to the fixed box 52 in a direction away from the push-pull drive assembly 42, the first limit switch 612 can be triggered by the first limit block 611.

The second limiting assembly 62 includes a second limiting block 621 and a second limiting switch 622, the second limiting block 621 is disposed on the fixed box 52 and is located at one end of the clutch output rack 535 away from the first elastic element 536, the second limiting switch 622 is disposed on the main control board 55, and when the sliding box 51 moves from the first position to the second position relative to the fixed box 52, the second limiting switch 622 can be triggered by the second limiting block 621.

Meanwhile, the second limiting block 621 is disposed at one end of the clutch output rack 535 far away from the first elastic element 536, when the first elastic element 536 is in natural extension, the end face of the clutch output rack 535 abuts against the second limiting block 621, that is, the second limiting block 621 limits the clutch output rack 535 to move along the direction far away from the push-pull driving assembly 42 relative to the initial position, so that the accuracy of controlling the movement state of the clutch output rack 535 is improved.

In this embodiment, the second limiting block 621 simultaneously serves to limit the movement or recovery of the clutch output rack 535 only along the direction of compressing the first elastic element 536, and in other embodiments, the second limiting block 621 may only cooperate with the second limiting switch 622 to limit, and meanwhile, a limiting element is additionally provided to limit the running direction of the clutch output rack 535.

In this embodiment, in order to realize the cooperation operation of the rotation mechanism 7 and the push-pull mechanism, the push-pull mechanism provided in this embodiment further includes a third limiting component, where the third limiting component includes a third limiting switch 63 and a third limiting block that are disposed at one end of the main control board 55 near the push-pull output piece 422, the third limiting block is disposed on the housing 1 or the fixed box 52, and when the door body 2 is in a closed position relative to the housing 1, the third limiting switch 63 is triggered by the third limiting block, so as to control the closing of the push-pull driving motor 421 and the start timing of the clutch driving mechanism according to the state of the third limiting switch 63.

In this embodiment, the first limit switch 612, the second limit switch 622, and the third limit switch 63 may be mechanical limit switches, or photoelectric sensing switches, such as proximity switches. The structural designs of the first limiting block 611, the second limiting block 621 and the third limiting block should be specifically designed based on the types of the first limiting switch 612 and the second limiting switch 622.

In this embodiment, to improve the control function of automatically opening and closing the door of the washing machine, the washing machine includes a control component, where the control component includes a main control board 55 and an information communication module, the first limit switch 612, the second limit switch 622, the third limit switch 63 and the information communication module are all connected with the main control board 55, and signals triggered by the first limit switch 612, the second limit switch 622 and the third limit switch 63 are transmitted to the main control board 55 and are received by the main control board 55, so as to control the running states of the clutch driving motor 531 and the push-pull driving motor 421; the information communication module can receive the action command of the user and transmit the action command to the main control board 55, and the main control board 55 controls the washing machine to execute corresponding door opening or door closing actions according to the action command.

In this embodiment, the information communication module may be a voice broadcast device, and receives a voice instruction of a user; the control button can also be a control button, and the control button can also be connected with a mobile terminal of a user in a wireless communication mode, and the user remotely sends an instruction to the information communication module through the mobile terminal. The embodiment does not make any specific limitation on how the information communication module receives the action instruction of the user, and the existing mode of transmitting the instruction to the controller by the user can be realized.

In this embodiment, to better control the door opening and closing operation of the washing machine, the washing machine further includes a position detecting assembly for detecting the relative position state of the door body 2 and the housing 1. Specifically, the position detecting component may be disposed in the rotation mechanism 7, and may further include a third limiting component, where the position detecting component is connected to the controller, and feeds back the relative position of the door body 2 and the housing 1 to the controller.

In this embodiment, when the washing machine is in the initial state, the push-pull driving assembly 42 is located at the second position, and no matter the door body 2 of the washing machine is in the closed state or the open state, the push-pull driving assembly 42 is not in contact with the door body 2, so that the user can operate the door body 2 in the opposite state by manually opening and closing the door or automatically opening and closing the door of the washing machine, thereby realizing the compatibility of manually opening and closing the door and automatically opening and closing the door.

Under the preset door opening condition, the position detection assembly detects the relative position of the door body 2 and the shell 1, and when the angle between the door body 2 and the shell 1 is larger than the preset angle and smaller than the maximum door opening angle, the main control board 55 controls the rotating mechanism 7 to start to drive the door body 2 to execute the door opening action; when the angle between the door body 2 and the shell 1 is equal to the maximum door opening angle, the main control board 55 sends information that the door is opened in place, and prompts that the door body 2 is opened; when the angle between the door body 2 and the shell 1 is smaller than the preset angle, the controller controls the pushing mechanism to operate, and at this time, the operation process of the pushing mechanism is as follows:

(1) The clutch driving motor 531 is started in forward rotation and the push-pull driving motor 421 is started in reverse rotation;

(2) Engagement of the second clutch gear 534 with the clutch output rack 535 moves the second clutch gear 534, thereby moving the push-pull drive assembly 42 from the second position to the first position;

(3) The push-pull member 41 is engaged with the push-pull output member 422 by the push-pull driving motor 421 and the first elastic member 536;

(4) The clutch output motor continues to rotate and the slide cassette 51 is stationary, the clutch output rack 535 moves away from the push-pull drive assembly 42 and the first resilient member 536 compresses;

(5) The clutch output rack 535 drives the first limiting block 611 to move, the first limiting block 611 contacts with the first limiting switch 612, the first limiting switch 612 is closed, the main control board 55 receives a signal of the first limiting switch 612, and the clutch driving motor 531 is controlled to be closed;

(6) The push-pull driving motor 421 continues to rotate to drive the push-pull piece 41 to move in a direction away from the shell 1, and the door body 2 overcomes the resistance of the door lock 3 to execute the door opening action;

(7) When the door body 2 rotates to a preset angle relative to the shell 1, the push-pull member 41 and the push-pull output member 422 are separated from the engaged position, and the push-pull driving motor 421 is closed;

(8) The rotating mechanism 7 is started to drive the door body 2 to execute a rotating door opening action, and when the door body 2 is opened to a maximum opening angle, the rotating mechanism 7 stops running;

(9) The clutch driving motor 531 rotates reversely, and the clutch output rack 535 moves in a direction approaching to the push-pull output assembly under the action of the first elastic element 536 and the clutch driving motor 531 until being limited by the second limiting block 621;

(10) The clutch driving motor 531 continuously rotates reversely to drive the sliding box body 51 to move, the push-pull driving assembly 42 moves from the second position to the first position, and when the second limiting block 621 is closed when the second limiting block 621 contacts the second limiting switch 622, the clutch driving motor 531 is closed, and the push-pull driving assembly 42 and the clutch mechanism are reset.

In this embodiment, the preset door opening condition includes: the controller receives a door opening instruction of a user, the door body 2 receives acting force along the door opening direction, the washing machine washes clothes in a preset time after finishing washing the clothes, and the like.

In this embodiment, the starting of the rotation mechanism 7, the reversing of the clutch driving motor 531 and the stopping of the push-pull driving motor 421 may be performed simultaneously, or may be sequentially started in different sequences, so that the operations of the clutch driving motor 531, the push-pull driving motor 421 and the rotation mechanism 7 do not interfere with each other.

Under the preset door closing condition, judging whether the third limit switch 63 is triggered, and when the third limit switch 63 is triggered, sending door closing in-place information by the main control board 55 to remind a user that the door body 2 is closed; when the third limit switch 63 is not triggered, the controller controls the push-pull mechanism to operate, and at this time, the operation process of the push-pull mechanism is as follows:

(1) The clutch driving motor 531 is started in a forward rotation manner and the push-pull driving motor 421 is started in a forward rotation manner;

(2) The engagement transmission of the second clutch gear 534 and the clutch output rack 535 enables the second clutch gear 534 to move, so as to drive the push-pull driving assembly 42 to move from the second position to the first position, the first limiting block 611 is contacted with the first limiting switch 612, the first limiting switch 612 is triggered, and the clutch driving motor 531 is closed;

(3) The rotating mechanism 7 is started to drive the door body 2 to move towards the door closing direction;

(4) After the rotating mechanism 7 rotates to a preset angle, the push-pull piece 41 is meshed with the push-pull output piece 422, and the rotating mechanism 7 stops rotating;

(5) The push-pull driving motor 421 continuously rotates positively to drive the push-pull piece 41 to move towards the direction approaching the shell 1, and the door body 2 overcomes the resistance of the door lock 3 to execute the door closing action;

(6) When the third limit switch 63 is triggered, the push-pull driving motor 421 is turned off;

(7) The clutch driving motor 531 rotates reversely, and the clutch output rack 535 moves in a direction approaching to the push-pull output assembly under the action of the first elastic element 536 and the clutch driving motor 531 until being limited by the second limiting block 621;

(8) The clutch driving motor 531 continuously rotates reversely to drive the sliding box body 51 to move, the push-pull driving assembly 42 moves from the first position to the second position, and when the second limit switch 622 is triggered when the second limit block 621 contacts with the second limit switch 622, the clutch driving motor 531 is turned off, and the push-pull driving assembly 42 and the clutch mechanism are reset.

In this embodiment, the preset door closing condition includes: the controller receives a door closing instruction of a user, the door body 2 receives acting force along the door closing direction, the door closing time preset by the user and the like.

In this embodiment, when the door closing operation is performed, the door closing operation of the rotation mechanism 7 may be performed synchronously with the start of the push-pull mechanism, or the rotation mechanism 7 may be operated first, and the push-pull mechanism may be restarted after the door body 2 is driven to a predetermined angle. In this embodiment, the reverse rotation start of the push-pull driving motor 421 and the forward rotation start of the clutch driving motor 531 are synchronized, or the clutch driving motor 531 may be started first, so that the push-pull driving motor 421 is restarted after the sliding box 51 is operated to a preset position. In this embodiment, the operation timing of the rotating mechanism 7, the push-pull driving mechanism and the clutch driving mechanism can be designed according to the situation, so that the operation of each mechanism is not interfered with each other, and the seamless butt joint of the operation of each mechanism is better, so that the operation efficiency of opening and closing the door of the washing machine is improved.

When a certain part in the push-pull mechanism fails or the push-pull mechanism stops running due to power failure in the process of executing automatic door opening and closing of the washing machine, the push-pull mechanism is in a locked state due to the self-locking characteristic of the worm gear in the push-pull clutch assembly, so that the failure of manually opening and closing the door of a user is caused, and the maintenance of the push-pull mechanism and the execution of manually opening and closing the door of the user are influenced. To avoid this problem, the push-pull mechanism provided in this embodiment further includes a disengagement assembly 54 for manually releasing the engagement state of the push-pull member 41 and the push-pull output member 422, so as to facilitate manual opening or closing of the door body 2, and to facilitate maintenance of the push-pull mechanism.

Fig. 6 is a schematic structural diagram of the disengagement assembly 54 provided in the present embodiment, as shown in fig. 6, the disengagement assembly 54 provided in the present embodiment includes a pull rope 541, a locking plate 542, a limiting column 544, and a second elastic element 543. The lock pressing plate 542 includes a first plate and a second plate connected to each other, wherein the first plate is disposed between the first clutch gear 533 and the upper cover of the slide cassette 51, and is connected to the upper end surface of the first clutch gear 533. The first plate is perpendicular to the second plate, and the second plate extends in the direction of the inside of the sliding box 51, and the connection position of the first plate and the second plate is rotatably connected to the sliding box 51 or the cover 56 through the rotation shaft 545. The lower end of the second plate is connected to one end of a pulling rope 541, and the other end of the pulling rope 541 extends outside the slide case 51 and the fixed case 52.

The lower end of the first clutch gear 533 is connected with the bottom of the sliding box body 51 through the second elastic element 543, the second elastic element 543 is sleeved on the limiting column 544, the lower end of the limiting column 544 is fixedly connected with the sliding box body 51, and when the disengagement assembly 54 is in an initial state, the upper end of the limiting column 544 is a preset distance from the lower end of the first clutch gear 533; when the upper end of the stopper 544 contacts the lower end of the first clutch gear 533, the first clutch gear 533 is disengaged from the clutch worm 532.

When the pull rope 541 is manually pulled, the pull rope 541 drives the second plate to rotate in a direction away from the bottom of the sliding box body 51 with the rotation shaft 545 as a central axis, so as to drive the first plate to move in a direction close to the bottom of the sliding box body 51; the first plate drives the first clutch gear 533 to compress the second elastic element 543 until the upper end of the limiting column 544 contacts the lower end of the first clutch gear 533, at which time the first clutch gear 533 and the clutch worm 532 are disengaged from each other. The pulling rope 541 is pulled continuously, the first clutch gear 533 cannot compress the second elastic element 543 under the limitation of the limiting column 544, the locking plate 542 cannot rotate continuously, and the sliding box 51 is driven to move in the direction from the first position to the second position by the locking plate 542, so that the push-pull member 41 and the push-pull output member 422 are separated from the engaged position, and meanwhile, the push-pull driving assembly 42 is restored to the second position.

In order to improve the connection stability between the second elastic element 543 and the first clutch gear 533, the second elastic element 543 and the first clutch gear 533 are further provided with a connecting bracket 546, where the connecting bracket 546 includes a support plate and a support leg, one end of the support plate is abutted against the lower end of the first clutch gear 533, the other end of the support plate is abutted against the second elastic element 543, and a plurality of support legs are disposed at circumferential positions of the support plate at intervals. The bottom plate of the sliding box body 51 is provided with a groove for accommodating the second elastic element 543 and the limiting column 544, the lower ends of the second elastic element 543 and the limiting column 544 are accommodated in the groove, and the overall height of the push-pull mechanism in height is reduced. The position of the bottom plate of the sliding box body 51 corresponding to the support is provided with a support leg groove into which the support leg extends, the lower end of the support leg groove is provided with a clamping hook, and the clamping hook can be clamped in the support leg groove to prevent the support leg from being separated from the support leg groove.

In this embodiment, the first elastic element 536 and the second elastic element 543 are springs, and in other embodiments, the first elastic element 536 and the second elastic element 543 may be other elements capable of stretching under force.

The push-pull mechanism provided by the embodiment can enable the push-pull clutch mechanism 5 to drive the push-pull driving assembly 42 to move between the first position and the second position by arranging the push-pull executing mechanism 4 and the push-pull clutch mechanism 5, so that the arrangement of the push-pull executing mechanism 4 does not influence the manual door opening and closing operation of a user, the washing machine can be compatible with the automatic door opening and closing operation and the manual door opening and closing operation of the user, the user experience is improved, and the running safety, reliability and stability of the push-pull mechanism are improved; by providing the first elastic member 536, the push-pull member 41 and the push-pull output member 422 can be urged to be in the engaged position, the operation reliability of the push-pull mechanism can be improved, and damage to the push-pull member 41 or the push-pull output member 422 can be prevented; by arranging the first limiting assembly 61, the second limiting assembly 62 and the third limiting assembly, the running controllability of the controller on the push-pull mechanism can be improved, and the running reliability and the running controllability of the push-pull mechanism can be improved; by arranging the disengagement assembly 54, when the structure of the push-pull mechanism is faulty or the power failure is faulty, the engagement and disengagement between the push-pull member 41 and the push-pull output member 422 and the resetting of the push-pull driving assembly 42 and the push-pull clutch mechanism 5 can be realized, so that the manual door opening and closing actions of a user are not influenced by the occurrence of the fault, and the maintenance and the replacement of the push-pull mechanism are facilitated.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A push-pull mechanism, comprising:

the push-pull executing mechanism (4), wherein the push-pull executing mechanism (4) comprises a push-pull piece (41) and a push-pull driving assembly (42) which are arranged separately;

the push-pull clutch mechanism (5) is connected with the push-pull driving assembly (42) and can drive the push-pull driving assembly (42) to move between a first position and a second position, when the push-pull driving assembly (42) is positioned at the first position, the push-pull driving assembly (42) can be contacted with the push-pull piece (41) and drive the push-pull piece (41) to move, and when the push-pull driving assembly (42) is positioned at the second position, the push-pull driving assembly (42) cannot be contacted with the push-pull piece (41);

The push-pull clutch mechanism (5) comprises:

a sliding box body (51) connected with the push-pull driving assembly (42);

the clutch driving assembly (53) is connected with the sliding box body (51) and can drive the sliding box body (51) to move;

the clutch driving assembly (53) includes:

a clutch output rack (535);

a clutch driving motor (531);

one end of the clutch gear set is connected with an output shaft of the clutch driving motor (531), the other end of the clutch gear set is meshed with the clutch output racks (535), and one of the clutch gear set and the clutch output racks (535) is fixedly connected with the sliding box body (51);

the push-pull drive assembly (42) includes:

the push-pull output piece (422) can be connected with the push-pull piece (41) and drive the push-pull piece (41) to move;

and the output shaft of the push-pull driving motor (421) is connected with the push-pull output piece (422) and can drive the push-pull output piece (422) to rotate.

2. The push-pull mechanism according to claim 1, wherein the clutch driving motor (531) and the clutch gear set are fixedly connected with the sliding box body (51), and the sliding box body (51) is slidably connected with the clutch output rack (535).

3. Push-pull mechanism according to claim 2, characterized in that the push-pull clutch mechanism (5) further comprises:

The clutch output rack (535) is connected with the fixed box body (52).

4. A push-pull mechanism according to claim 3, wherein the clutch output rack (535) is slidably connected with the fixed box body (52), one end of the clutch output rack (535) away from the push-pull driving assembly (42) is connected with one end of a first elastic element (536), the other end of the first elastic element (536) is connected with the fixed box body (52), and the expansion direction of the first elastic element (536) is the same as the length direction of the clutch output rack (535).

5. The push-pull mechanism of claim 1 wherein the clutch gear set comprises:

a clutch worm (532) connected to an output shaft of the clutch driving motor (531);

a first clutch gear (533) engaged with the clutch worm (532);

and a second clutch gear (544) which is engaged with the first clutch gear (533) and the clutch output rack (535), respectively.

6. The push-pull mechanism of claim 5, wherein the push-pull clutch mechanism (5) further comprises a disengagement assembly (54), the disengagement assembly (54) comprising:

The locking plate (542), the locking plate (542) comprises a first plate and a second plate which are connected with each other, the first plate and the second plate have a preset included angle, the lower surface of the first plate is abutted with the upper end surface of the first clutch gear (533), and the joint of the first plate and the second plate is rotationally connected with the sliding box body (51);

a second elastic element (543) having one end connected to the lower end of the first clutch gear (533) and the other end connected to the bottom plate of the sliding case (51);

and a pull rope (541) having one end connected to the second plate and the other end extending outside the slide case (51).

7. Push-pull mechanism according to claim 1, characterized in that the push-pull output member (422) is a worm and the push-pull member (41) is a worm master;

or, the push-pull output piece (422) is a screw rod, and the push-pull piece (41) is a deformation nut.

8. An electric appliance comprising a door body (2) and a shell (1), wherein one side of the door body (2) is hinged with the shell (1), and the electric appliance is characterized by comprising the push-pull mechanism as claimed in any one of claims 1-7, the push-pull member (41) is arranged on the other side of the door body (2), and the push-pull driving assembly (42) and the push-pull clutch mechanism (5) are both arranged on the shell (1).