WO2024032621A1

WO2024032621A1 - Refrigerator

Info

Publication number: WO2024032621A1
Application number: PCT/CN2023/111780
Authority: WO
Inventors: 兰传锋; 苗建林; 董凌云; 李春阳
Original assignee: 青岛海尔电冰箱有限公司; 海尔智家股份有限公司
Priority date: 2022-08-09
Filing date: 2023-08-08
Publication date: 2024-02-15
Also published as: CN117628773A

Abstract

A refrigerator (100), comprising a refrigerator body (110), a drawer, a slide rail assembly (130), and a driving assembly (140). The driving assembly (140) comprises a motor (143) and a clutch transmission mechanism. The clutch transmission mechanism comprises an input gear (181), an output gear (182) and a connecting member (183). The connecting member (183) has a linkage position (1843, 1844) and a clutch position (1845). When the input gear (181) is in the clutch position (1845), the connecting member (183) disconnects the transmission between the input gear (181) and the output gear (182). When the input gear (181) is in the linkage position (1843, 1844), the motor (143) can drive the input gear (181) to rotate towards the clutch position (1845) to the clutch position (1845), or drive the input gear (181) to rotate away from the clutch position (1845) so as to drive the connecting member (183) and the output gear (182) to rotate synchronously. A control module is used for controlling the motor (143) to drive the input gear (181) to rotate towards the clutch position (1845) if a clutch opening signal is received, and controlling the motor (143) to brake when it is detected that the input gear (181) has been in the clutch position (1845) for a preset duration.

Description

refrigerator

Technical field

The invention relates to the field of household appliances, and in particular to a refrigerator.

Background technique

At present, refrigerators have become indispensable household appliances in daily life. Some refrigerators are equipped with drawers or pull-out doors. The drawers and pull-out doors are generally connected to the box through slide rail assemblies. Some refrigerators are equipped with a driving structure, which automatically drives the slide rail assembly to realize automatic opening and closing of the refrigerator drawer or door.

In order to meet the user's manual operation needs at the same time, some refrigerators can be equipped with a clutch transmission mechanism, which can be switched to manual operation mode by opening the clutch transmission mechanism. However, the drive components are often complex and the clutch opening process is unstable.

Contents of the invention

The object of the present invention is to provide a refrigerator in which the motor directly controls the opening and closing of the clutch transmission mechanism and can avoid incomplete opening.

In order to achieve the above object, one embodiment of the present invention provides a refrigerator, including: a box body, a drawer installed in the box body, a slide rail assembly connecting the drawer and the box body, and a sliding rail assembly for driving the drawer. The driving assembly for the movement of the slide rail assembly;

The driving assembly includes a motor and a clutch transmission mechanism. The clutch transmission mechanism includes an input gear, an output gear and a connecting piece. The connecting piece has a linkage position and a clutch area. When the input gear is in the clutch area, the The connecting piece disconnects the transmission between the input gear and the output gear. When the input gear is in the linkage position, the motor can drive the input gear to rotate toward the clutch area to the clutch area, Or drive the input gear to rotate away from the clutch area to drive the connecting piece and the output gear to rotate synchronously, and drive the drawer to open or close;

The refrigerator also includes a control module configured to: when the input gear is in the linkage position, if an open clutch signal is received, control the motor to drive the input gear to rotate toward the clutch area; when detecting When the input gear enters the clutch area for a preset time, the motor is controlled to brake.

As a further improvement of an embodiment of the present invention, the linkage position includes a first linkage position and a second linkage position, the clutch position is located between the first linkage position and the second linkage position, and the input gear When in the clutch position, the motor forwardly drives the input gear to move in the first direction to the first linkage position, and the motor reversely drives the input gear to move in the second direction to the first linkage position. Linkage position; when the input gear is in the first linkage position, the motor rotates forward to drive the input gear, the connector and the output gear to rotate synchronously to drive the drawer to open, and the motor reversely rotates to open the drawer. The input gear is driven to move relative to the connecting piece to the clutch position; when the input gear is in the second linkage position, the motor reversely drives the input gear, the connecting piece and the output gear The synchronous rotation drives the drawer to open, and the forward rotation of the motor drives the input gear to move relative to the connecting piece to the clutch position.

As a further improvement of an embodiment of the present invention, the control module is configured to: when receiving a drawer opening signal, control the motor to rotate forward to drive the input gear to rotate in the first direction to drive the drawer to open, When the opening end signal is received, the motor is controlled to reversely drive the input gear to move toward the clutch area at the first linkage position.

As a further improvement of an embodiment of the present invention, the control module is configured to: when receiving a drawer closing signal, control the motor to reversely drive the input gear to rotate in the second direction to drive the drawer to close, When the closing end signal is received, the motor is controlled to rotate forward to drive the input gear to move from the second linkage position toward the clutch area.

As a further improvement of an embodiment of the present invention, a cam track is provided on the surface of the connecting member opposite to the input gear, the input gear is provided with a clutch protrusion that cooperates with the cam track, and the cam track includes a symmetrical A first cam track and a second cam track are provided, the intersection position of the first cam track and the second cam track forms the clutch position, and the two ends of the cam track respectively form the first linkage position and the clutch position. The second linkage position, the cam track is tilted from the clutch position to the first linkage position and the second linkage position, the connector is also provided with a connecting rod, and the output gear has a The connecting rod fits into the connecting groove. The input gear rotates to drive the clutch protrusion to move in the cam track, driving the connecting piece to move axially to make the connecting rod match or disengage from the connecting slot. When the clutch protrusion is in the clutch position, the connecting rod is disengaged from the connecting groove; when the clutch protrusion is in the linkage position, the connecting rod is engaged with the connecting groove.

As a further improvement of an embodiment of the present invention, the clutch transmission mechanism also includes a photoelectric sensor disposed on one side of the connecting piece. When the clutch transmission mechanism switches between the open state and the closed state, the photoelectric sensor The photoelectric signal changes, and the control module is used to determine whether the input gear moves to the clutch position according to the photoelectric signal of the photoelectric sensor.

As a further improvement of an embodiment of the present invention, the preset time length is negatively related to the rotation speed when the motor drives the input gear to move toward the clutch area.

As a further improvement of an embodiment of the present invention, when it is detected that the input gear enters the clutch area When the domain is set for a preset time, the motor energy consumption braking is controlled.

As a further improvement of an embodiment of the present invention, the control module is also configured to: when the motor rotates forward to drive the drawer to open, if an increase in the motor current is detected, send an opening end signal.

As a further improvement of an embodiment of the present invention, the control module is configured to: when the motor rotates forward to drive the drawer to open, if the pulse signal of the motor is not detected within a preset time period, the opening end is issued. Signal.

The invention is provided with a clutch transmission mechanism in the refrigerator driving assembly. The motor can drive the clutch transmission mechanism to open or close. When the motor drives the clutch transmission mechanism to open, the motor brake is controlled for a preset time after entering the critical position where the clutch transmission mechanism is opened. This allows it to operate to the optimal clutch position and improve overall stability.

Description of drawings

Figure 1 is a schematic three-dimensional view of a refrigerator according to an embodiment of the present invention;

Figure 2 is a schematic three-dimensional view of the box shown in Figure 1;

Figure 3 is a three-dimensional schematic view of the slide rail assembly shown in Figure 1;

Figure 4 is an exploded schematic diagram of the slide rail assembly shown in Figure 3;

Figure 5 is a schematic diagram of a driving assembly according to an embodiment of the present invention;

Figure 6 is a schematic diagram of the input gear shown in Figure 5;

Figure 7 is a schematic diagram of the connector shown in Figure 5;

Figure 8 is a schematic diagram of the friction wheel shown in Figure 5;

FIG. 9 is a schematic diagram of the output gear shown in FIG. 5 .

Detailed ways

The present invention will be described in detail below with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention. Structural, method, or functional changes made by those of ordinary skill in the art based on these embodiments are all included in the protection scope of the present invention.

Referring to Figure 1, the present invention provides a refrigerator 100. The refrigerator 100 includes a box body 110. The storage space formed in the box body 110 includes a refrigeration compartment and a freezing compartment. A slide rail assembly 130 can be installed in the box body 110. As well as the driving assembly 140, the slide rail assembly 130 can be installed on the side wall of the box 110. In this embodiment, the slide rail assembly 130 can be installed on the side wall of the freezing compartment.

Referring to Figures 1 to 4, in one embodiment of the present invention, the slide rail assembly 130 includes a fixed slide rail 131 and a movable slide rail. The fixed slide rail 131 is fixedly installed on the side wall of the box 110. The movable slide rail and the fixed slide rail Rail 131 sliding connection, moving A drawer or door body is installed on the slide rail. The driving assembly 140 is used to drive the movable slide rail to move. The movable slide rail slides relative to the fixed slide rail 131 to drive the drawer or door body to open or close. The side wall of the box 110 may be provided with a receiving groove 111 , and the driving assembly 140 is fixedly installed in the box 110 and may be partially placed in the receiving groove 111 .

In this embodiment, the side wall of the box 110 can be directly recessed to form the receiving groove 111 . The box body 110 may include an outer shell and an inner lining, and a thermal insulation material may be filled between the outer shell and the inner lining. The inner lining may be provided with an opening, and a pre-embedded box may be installed at the opening to form a receiving groove 111 .

The driving component 140 is fixed inside the box 110 and does not follow the moving slide rail. The overall structure is simple, and the driving component 140 is partially placed in the receiving groove 111 on the side wall of the box 110, which can reduce the impact of the driving component 140 on the internal space of the box 110. of occupation.

Further, in one embodiment of the present invention, the driving assembly 140 includes a motor 143, a transmission mechanism and a driving gear 142. The motor 143 is connected to the transmission mechanism, and the transmission mechanism is connected to the driving gear 142. The rotation of the motor 143 drives the transmission mechanism and in turn drives the driving gear. 142 turns. The movable slide rail may be provided with a rack 134 that meshes with the driving gear 142, and the axis of the driving gear 142 is perpendicular to the sliding direction of the movable slide rail.

In this embodiment, the rack 134 structure can be integrally formed with the movable slide rail, or it can be an independent rack 134 installed on the movable slide rail through fasteners such as screws. The side close to the opening of the storage compartment can be the front side, and the side far away from the opening of the storage compartment can be the rear side. The driving assembly 140 can be disposed on the side close to the opening of the storage compartment. The forward rotation of the motor 143 can drive the driving gear 142 to rotate. , thereby driving the rack 134 and the movable slide rail to move forward, driving the drawer or door to open, and the reverse rotation of the motor 143 can drive the rack 134 and the movable slide rail to move to the rear, driving the drawer or door to close.

When the drawer or door is in a closed state, the driving assembly 140 can be located on the front side of the movable slide rail. When the drawer or door is in an open state, the driving assembly 140 can be located on the rear side of the movable slide rail. The overall driving structure is simple and compact.

Further, in an embodiment of the present invention, the movable slide rail may include a first movable slide rail 132 and a second movable slide rail 133, and the slide rail assembly 130 further includes a transmission connecting the first movable slide rail 132 and the second movable slide rail. 133 synchronous transmission structure 150. The first movable slide rail 132 can be placed between the fixed slide rail 131 and the second movable slide rail 133 and is slidingly connected with the fixed slide rail 131 and the second movable slide rail 133. The rack 134 can be disposed on the first movable slide rail. 132. The second movable slide rail 133 can be fixedly connected to the drawer or door body. The movement of the first movable slide rail 132 can drive the synchronous transmission structure 150 to drive the second movable slide rail 133 to move in the same direction, thereby driving the drawer or door body to open or closure.

In this embodiment, the synchronous transmission structure 150 may include a first pulley 151 and a second pulley 152 respectively installed at both ends of the first movable slide rail 132, and a pulley that cooperates with the first pulley 151 and the second pulley 152. The synchronous belt 153, both sides of the synchronous belt 153 can be fixedly connected to the fixed slide rail 131 and the second movable slide rail 133 respectively. Motor 143 The first movable slide rail 132 is driven to move, which drives the synchronous belt 153 to move, and then drives the second movable slide rail 133 to slide relative to the first movable slide rail 132. The second movable slide rail 133 drives the drawer or door to open or close. The movement direction of the second movable slide rail 133 is the same as the movement direction of the first movable slide rail 132. In this way, the opening of the second movable slide rail 133 can be increased, thereby increasing the opening of the drawer or door, which is convenient for use. Store ingredients.

In one embodiment of the present invention, the side wall of the box 110 includes two opposite side walls. The two opposite side walls may be a left side wall and a right side wall. Both the left side wall and the right side wall may be equipped with sliders. The rail assembly 130 and the driving assembly 140 can be disposed on a side wall, and the first moving slide rails 132 of the two slide rail assemblies 130 can be connected through a synchronization rod. The driving assembly 140 can drive the first movable slide rail 132 on one side to move, and drive the first movable slide rail 132 on the other side to move through the synchronization rod.

The synchronization rod can be arranged on the rear side of the drawer, and the synchronization rod can be connected to the first pulleys 151 of the slide rail assemblies 130 on both sides to drive the slide rail assemblies on both sides to move synchronously by driving the pulleys on both sides to move synchronously.

In this way, only one driving component 140 can be provided in the box 110 to simultaneously drive the slide rail components 130 on both sides to move. The overall structure is simple, and the openings of both sides of the drawer or door are even and the forces are balanced.

In another embodiment of the present invention, the left side wall and the right side of the box 110 are provided with a slide rail assembly 130, a receiving groove 111 and a driving assembly 140. The driving assembly 140 on the left side wall can be installed in the accommodating groove 111 of the left side wall and directly drives the slide rail assembly 130 on the left side to move. The driving assembly 140 of the right side wall can be installed in the accommodating slot 111 of the right side wall and directly drive the movement of the slide rail assembly 130 on the left side. The slide rail assembly 130 on the right side is driven to move.

In this embodiment, the same slide rail assembly 130 and driving assembly 140 can be disposed on the left side wall and the right side wall at the same time, so that the stability of the overall structure is better. Accommodation slots 111 are provided on both sides, which can reduce the internal space occupied by the driving assembly 140 .

In one embodiment of the present invention, the refrigerator 100 further includes a mounting bracket 160 fixedly mounted on the side wall of the box 110. Both the fixed slide rail 131 and the driving assembly 140 can be fixedly connected to the mounting bracket 160. The movable slide rail can also be installed on the mounting bracket 160, and the fixed slide rail 131 can be integrally formed with the mounting bracket 160, or can be connected to the mounting bracket 160 through fasteners such as bolts.

During the manufacturing process of the refrigerator 100, the fixed slide rail 131, the movable slide rail and the installation bracket 160 can be pre-assembled into one, then the drive assembly 140 is installed on the installation bracket 160, and finally the installation bracket 160 is installed on the refrigerator 100 box 110 In the predetermined position, the installation can be completed, and the installation process is quick and convenient.

Further, in one embodiment of the present invention, the mounting bracket 160 includes a slide rail bracket 161 and a driving bracket 162 extending from the slide rail bracket 161. The driving bracket 162 can cover at least part of the accommodating slot 111, and the driving assembly 140 can be fixedly connected to The driving bracket 162 is at least partially located between the driving bracket 162 and the side wall of the box 110 .

In this embodiment, the driving assembly 140 may include a driving box 141 , the motor 143 and the transmission mechanism may be installed inside the driving box 141 , and the driving gear 142 may be placed outside the driving box 141 . The drive box 141 and the drive gear 142 can be located on both sides of the drive bracket 162 . The drive box 141 can be located between the drive bracket 162 and the side wall of the box 110 , and is at least partially placed in the receiving groove 111 .

The driving bracket 162 can completely cover the opening of the receiving slot 111 , or cover most of the opening of the receiving slot 111 , and a shaft hole can be provided on the driving bracket 162 . The slide rail bracket 161 can be provided with screw holes and is connected to the side wall of the box 110 through screws. The drive box 141 can be connected to the drive bracket 162 through screws. The connecting shaft between the transmission mechanism and the drive gear 142 can pass through the slide rail bracket. 161, the driving gear 142 directly meshes with the rack 134 of the first moving slide rail 132, driving the first moving slide rail 132 to move.

In this way, the slide rail assembly 130 and the driving assembly 140 are installed simultaneously through the mounting bracket 160. The mounting bracket 160 provides an installation position for the driving assembly 140, which can reduce the number of screw holes on the box 110, facilitate assembly, and the overall structure is simple. compact.

In one embodiment of the present invention, the refrigerator 100 further includes a drawer mounting frame 170. The drawer mounting frame 170 is fixedly connected to the second sliding rail 133. The drawer is fixedly connected to the drawer mounting frame 170. The synchronous transmission structure 150 is located between the drawer mounting frame 170 and the drawer mounting frame 170. between the side walls of the box 110. In this embodiment, the synchronous transmission structure 150 can be located between the drawer mounting bracket 170 and the mounting bracket 160 . The drawer mounting bracket 170 is used to install the drawer and can cover the slide rail assembly 130 . The user can remove the drawer from the drawer mounting bracket 170 for cleaning, and the drawer mounting bracket 170 can cover the internal structure to reduce the exposure of internal components of the refrigerator 100 .

Further, referring to FIGS. 5 to 9 , in one embodiment of the present invention, the transmission mechanism includes a clutch transmission mechanism. The input end of the clutch transmission mechanism is transmission connected with the motor 143 , and the output end can be transmission connection with the driving gear 142 . The motor 143 can drive the clutch transmission mechanism to open or close. When the clutch transmission mechanism is in the open state, the clutch transmission mechanism can disconnect the transmission between the motor 143 and the slide rail assembly 130. At this time, the user can manually push and pull the drawer without being hindered. When the clutch transmission mechanism is in a closed state, the motor 143 is drivingly connected to the slide rail assembly 130. At this time, the motor 143 can directly drive the slide rail assembly 130 to move, thereby driving the drawer to open and close. However, due to the self-locking of the motor 143, users often Difficulty manually pushing and pulling drawers.

The refrigerator 100 may also include a control module that may be configured to receive a signal to open the drawer or close the drawer. The refrigerator 100 may be provided with an input module. For example, if a display screen or a voice input module is provided, the user can input a drawer opening instruction or a drawer closing instruction through the input module. Of course, a Hall sensor can also be installed to detect the pulse signal of the motor 143 to determine whether the user has the intention to open or close the drawer, and generate a signal to open or close the drawer.

When opening the drawer, the drawer can be opened to the preset position and the motor 143 is controlled to brake. It can also be opened and ended when other signals are received, and the motor 143 is controlled to brake.

The drawer of the refrigerator 100 can be integrated with the door body, and the slide rail assembly 130 can drive the movement of the drawer and the door body at the same time. A related door detection module can also be installed on the refrigerator 100. The door closing detection module can be a pressure sensor. When it is detected that the door body of the refrigerator 100 is closed. When, the closing end signal can be sent to control the motor 143 to brake.

The control module can be used to control the motor 143 to drive the clutch transmission mechanism to open when the drawer ends opening or closing.

In this embodiment, when the drawer opening end signal or the drawer closing end signal is received, the motor 143 can be controlled to brake first, and then the motor 143 can be controlled to reversely rotate to drive the clutch transmission mechanism to open.

In this way, when the drawer is in the open or closed position, the clutch transmission mechanism is in the open state, and the user can manually operate the drawer at will. Even if a power outage occurs after the drawer is opened or closed, the drawer will not be locked, making it easier for the user to operate.

Further, in an embodiment of the present invention, the clutch transmission mechanism may include an input gear 181, an output gear 182 and a connecting piece 183. The input gear 181 can form an input end and is drivingly connected to the motor 143 , and the output gear 182 can form an output end and is drivingly connected to the driving gear 142 . The output gear 182 may also directly form the drive gear 142. The output gear 182 can be directly provided with the gear in an integrated structure, or can be fixedly connected with the gear in a split structure.

The input gear 181 may have a linkage position and a clutch position 1845 relative to the connector 183. When the input gear 181 is in the clutch position 1845 relative to the connector 183, the clutch transmission mechanism is opened, and the connector 183 disconnects the transmission between the input gear 181 and the output gear 182. . When the input gear 181 is in the linkage position relative to the connector 183, the input gear 181 rotates toward the clutch position 1845 to switch to the clutch position 1845, and when the motor 143 drives the input gear 181 to rotate toward the clutch position 1845, the input gear 181 will not drive the connector 183 and the output gear 182 rotate synchronously. If the input gear 181 rotates in a direction away from the clutch position 1845, the input gear 181 can drive the connecting piece 183 and the output gear 182 to rotate synchronously, thereby driving the drawer to open or close.

In this embodiment, the control module is used to: when receiving a drawer opening or closing signal, control the motor 143 to drive the input gear 181 to rotate toward the away from clutch position 1845. At this time, the motor 143 can first drive the input gear 181 relative to the connector 183 Rotate to switch from the clutch position 1845 to the linkage position, and the motor 143 continues to run, which can drive the connecting piece 183 and the output gear 182 to rotate synchronously. When the drawer opening or closing signal is received, the motor 143 can be controlled to brake and reverse, and the drive input gear 181 is switched to the clutch position 1845. At this time, the user can manually operate the drawer.

Furthermore, in an embodiment of the present invention, the linkage position may include a first linkage position 1843 and a second linkage position 1844, and the clutch position 1845 may be located between the first linkage position 1843 and the second linkage position 1844. When the input gear 181 is in the first linkage position 1843 relative to the connector 183, the motor 143 rotates forward to drive the input gear 181 to rotate in the first direction and drives the output gear 182 to rotate to open the drawer. At this time, the motor 143 rotates reversely to drive the input gear 181. Rotating in the second direction opposite to the first direction drives the input gear 181 to move to the clutch position 1845 and the second linkage position 1844 in sequence. When the input gear 181 is in the second linkage position 1844 relative to the connector 183, the reverse rotation of the motor 143 can drive the input gear 181 to rotate in the second direction and drive the output gear 182 to rotate to close the drawer. The forward rotation of the motor 143 can drive the input gear 181 to rotate in the first direction. The directional rotation drives the input gear 181 to move to the clutch position 1845 and the first linkage position 1843 in sequence.

In one embodiment of the present invention, the control module is configured to: when receiving a drawer opening signal, control the motor 143 to rotate forward to drive the input gear 181 to rotate in the first direction; when receiving a drawer opening stop signal, control the motor 143 to reverse rotation , the driving input gear 181 rotates in the second direction relative to the connecting member 183 to the clutch position 1845; when receiving the drawer closing signal, the control motor 143 reverses, driving the input gear 181 to rotate in the second direction; when receiving the drawer closing signal When the end signal is given, the motor 143 is controlled to rotate forward, and the driving input gear 181 rotates relative to the connecting member 183 along the first direction from the second linkage position 1844 to the clutch position 1845.

In this embodiment, when the motor 143 drives the drawer to open, the input gear 181 can be in the first linkage position 1843 relative to the connector 183. When the opening end signal is received, the motor 143 can be controlled to reverse and drive the input gear 181 Switch to the clutch position 1845. When the input gear 181 moves in the second direction to the clutch position 1845, the motor 143 can be controlled to stop. At this time, the clutch transmission mechanism is in an open state, and the user can manually operate the drawer. When receiving the drawer closing signal, the control module can control the motor 143 to continue to rotate in the reverse direction, driving the input gear 181 to continue to rotate in the second direction. The input gear 181 first rotates relative to the connecting piece 183 to the first linkage position 1843, and then the motor 143 continues to rotate in the reverse direction. rotation, the input gear 181 continues to rotate in the second direction and simultaneously drives the connecting piece 183 and the output gear 182 to rotate, thereby driving the drawer to close. When the drawer is closed, after the braking of the control motor 143 is completed, the controllable motor 143 rotates forward again, driving the input gear 181 to move in the first direction to the clutch position 1845 and then stops. When the drawer opening signal is received again, the control motor 143 rotates forward, first driving the input gear 181 to move to the first linkage position 1843, and then driving the input gear 181, the connector 183 and the output gear 182 to rotate synchronously to drive the drawer to open.

In this way, by controlling the forward or reverse rotation of the motor 143, the input gear 181 can be driven to change in different positions relative to the connector 183, thereby realizing the opening and closing of the clutch transmission mechanism through the motor 143, and driving the drawer to open or close. The overall structure is simple and can satisfy many needs. kind of demand.

Further, in one embodiment of the present invention, the clutch transmission mechanism output gear 182, input gear 181, and connecting piece 183 can be arranged coaxially. The connecting piece 183 is provided with a cam track 184 on the surface opposite to the input gear 181. The input gear 181 and The opposite surface of the connecting piece 183 is provided with a clutch protrusion 1811 that cooperates with the cam track 184. The input gear 181 rotates relative to the connecting member 183 to drive the clutch protrusion 1811 to rotate in the cam track 184 . The cam track 184 may include a first cam track 1841 and a second cam track 1842 that are symmetrically arranged. The intersection position of the first cam track 1841 and the second cam track 1842 forms the clutch position 1845. The two ends of the cam track 184 can form the first linkage position 1843 and the second linkage position 1844. The cam track 184 moves from the clutch position 1845 to the first linkage position. Position 1843 and second linkage position 1844 are tilted. The connecting piece 183 can be provided with a connecting rod 1831. The connecting rod 1831 can be arranged on the side of the connecting piece 183 opposite to the output gear 182. The output gear 182 can have a connecting groove 1821 that cooperates with the connecting rod 1831. The input gear 181 drives the clutch protrusion 1811. Movement within the cam track 184 can drive the connecting member 183 to move axially, thereby causing the connecting rod 1831 to engage or disengage with the connecting groove 1821 .

When the input gear 181 rotates relative to the connecting piece 183 from the clutch position 1845 to the linkage position, the connecting piece 183 can move axially toward the output gear 182 side, and the connecting rod 1831 can gradually extend into the connecting groove 1821 to cooperate with the connecting groove 1821. When the input When the gear 181 moves to the linkage position relative to the connector 183, the connecting rod 1831 can cooperate with the connecting groove 1821; when the input gear 181 rotates relative to the connector 183 from the linkage position to the clutch position, the connector 183 can face the side shaft away from the output gear 182 Moving in the direction, the connecting rod 1831 can gradually disengage from the connecting groove 1821. When the input gear 181 moves relative to the connecting piece 183 to the clutch position 1845, the connecting rod 1831 can be completely located outside the connecting groove 1821 and disengage from the connecting groove 1821.

In this embodiment, the direction in which the clutch protrusion 1811 rotates from the second linkage position 1844 to the first linkage position 1843 may be the first direction, and the direction in which the clutch protrusion 1811 rotates from the first linkage position 1843 to the second linkage position 1844 Can be the second direction.

The output gear 182, the connecting piece 183, and the input gear 181 can be arranged coaxially and sequentially. The connecting piece 183 can be disposed between the output gear 182 and the input gear 181. A spring 185 can also be disposed between the connecting piece 183 and the output gear 182. Both ends of the spring 185 can abut the connecting piece 183 and the output gear 182 respectively. The clutch The position 1845 may be closer to the output gear 182 than the first linkage position 1843 and the second linkage position 1844 .

When the input gear 181 is in the clutch position 1845 relative to the connecting piece 183, the spring 185 can be released, the connecting rod 183 is disengaged from the connecting groove 1821, and the input gear 181 moves from the clutch position 1845 to the first linkage position or the second linkage position relative to the connecting piece 183. When, the clutch protrusion 1811 moves from the clutch position 1845 to the first linkage position 1843 or the second linkage position 1844 along the cam track 1841, the driving connection member 183 moves axially toward the output gear 182, and the spring 185 is compressed.

Specifically, when the input gear 181 rotates in the first direction relative to the connecting piece 183 to the first linkage position 1843, the connecting rod 1831 extends into the connecting groove 1821 to cooperate with the connecting groove 1821, and the connecting rod 1831 is at one end of the connecting groove 1821. The input gear 181 continues to rotate in the first direction, and the clutch protrusion 1811 presses against the cam track. 1841 The side wall at the first linkage position 1843 drives the connecting piece 183 to rotate synchronously in the first direction. At the same time, the connecting rod 1831 presses against the groove wall of the connecting groove 1821, driving the output gear 182 to rotate synchronously in the first direction.

Similarly, when the input gear 181 rotates in the second direction relative to the connecting member 183 to the second linkage position 1844, the connecting rod 1831 extends into the connecting groove 1821 to cooperate with the connecting groove 1821, and the connecting rod 1831 can be located on the other side of the connecting groove 1821. At one end, the input gear 181 continues to rotate in the second direction, and the clutch protrusion 1811 presses against the side wall at the second linkage position 1844 of the cam track 184 to drive the connecting member 183 to rotate synchronously in the second direction, and at the same time, the connecting rod 1831 presses against the connecting groove 1821 The groove wall at the other end drives the output gear 182 to rotate synchronously in the second direction.

The clutch transmission mechanism can also include a friction wheel 186. The connecting piece 183, the input gear 181, and the output gear 182 can be sleeved on the shaft 1861 of the friction wheel. The shaft 1861 of the friction wheel 186 can be in a special shape. The shaft hole in the connecting rod 183 The shape of shaft 1831 may be the same as shaft 1861. When the motor 143 drives the input gear 181 to move relative to the connecting member 183 , the friction wheel 186 can restrict the connecting member 183 from rotating driven by the input gear 181 .

The present invention also provides a clutch transmission mechanism in another embodiment. In this embodiment, the input gear can be disposed between the connecting piece and the output gear. The surface of the connecting piece opposite to the input gear can be provided with a cam track and a connecting rod at the same time. The input gear can be provided with a long hole for the connecting rod to pass through. hole. The clutch position in the cam track is closer to the output gear relative to the first linkage position and the second linkage position. The spring can be arranged between the connecting piece and the housing. When in the clutch position, the spring is compressed, the connecting rod is disengaged from the connecting groove, the transmission between the input gear and the output gear is disconnected, and the input gear moves from the clutch position to the first When the linkage position or the second linkage position rotates, the clutch protrusion moves toward the first linkage position or the second linkage position in the cam track, the spring is released, and the connecting piece moves axially toward the input gear, so that the connecting rod is gradually inserted into the connection. In the groove, the input gear can drive the output gear to move synchronously.

The clutch transmission mechanism is simple as a whole. The clutch transmission mechanism can be simply controlled to switch between the open state and the closed state through the movement of the motor 143. When the user operates the drawer to open or close, the clutch transmission mechanism can be opened simply and quickly. Disconnect the transmission between the motor 143 and the slide rail assembly 130 .

Further, in one embodiment of the present invention, the clutch transmission mechanism also includes a photoelectric sensor 187 provided on one side of the connector 183. When the clutch transmission mechanism switches between the open state and the closed state, the photoelectric signal of the photoelectric sensor changes. In one of the clutch position 1845 and the linkage position, the connecting piece 183 blocks the photoelectric sensor 187 , and in the other one of the clutch position 1845 and the linkage position, the connecting piece 183 does not block the photoelectric sensor 187 . Therefore, the control module can be used to determine whether the input gear 181 moves to the clutch position 1845 based on the photoelectric signal of the photoelectric sensor 187. When controlling the clutch transmission mechanism to open, when it is detected that the input gear 181 moves to the clutch position 1845 relative to the connecting member 183, it can Control the braking of the motor 143. The braking method of the motor 143 can be: Energy consumption braking.

In one embodiment of the present invention, the refrigerator 100 may also be provided with a current detection module for detecting the current of the motor 143. The control module is also used to: when the motor 143 rotates forward to drive the drawer to open, if an increase in the current of the motor 143 is detected, The control motor 143 reversely drives the input gear 181 to rotate in the second direction relative to the connecting member 183 to the clutch position 1845 .

In this embodiment, during the opening process of the drawer, if the current of the motor 143 suddenly rises and the motor 143 is blocked, it can be judged that the drawer is hindered in its operation, such as encountering obstacles or has moved to the position expected by the user. The user manually prevents the drawer from further operation. At this time, the opening end signal can be sent, and the motor 143 is controlled to brake and reverse, driving the input gear 181 to rotate relative to the connector 183 to the clutch position 1845 to open the clutch transmission mechanism, disconnect the input gear 181 and The transmission between the output gears 182 allows the user to manually operate the drawer.

In another embodiment of the present invention, the opening and closing direction of the drawer can be determined based on the pulse signal of the motor 143. The control module is also used to: when the motor 143 rotates forward to drive the drawer to open, obtain the pulse signal of the motor 143. If the preset time If the pulse signal of the motor 143 is not detected, the motor 143 is controlled to reversely drive the input gear 181 to rotate in the second direction relative to the connecting member 183 to the clutch position 1845.

In this implementation, if the period of the normal pulse signal is T, the preset duration can be 0.6-2T. If no change in the pulse signal is detected within the preset duration, it can be determined that the drawer encounters an obstacle or the user manually blocks the drawer. At this time, the drawer opening end signal can be sent to control the clutch transmission mechanism to open.

In this way, during the process of opening the drawer, it can be automatically determined according to the change of the current or pulse signal of the motor 143 whether there is any obstruction in the drawer opening process. When it is determined that the drawer is obstructed, the motor 143 is controlled to brake and open the clutch transmission mechanism. .

One embodiment of the present invention provides a method for controlling the opening of a clutch transmission mechanism. In this embodiment, the control module is also used to: when the input gear 181 is in the first linkage position 1843 or the second linkage position 1844, if it receives When the clutch signal is turned on, the control motor 143 forwardly drives the input gear 181 to move from the second linkage position 1844 to the clutch position 1845 at a preset speed, or drives the input gear 181 to move from the first linkage position 1843 to the clutch at a preset speed reversely. Position 1845, where the preset speed is less than the no-load speed of the motor 143.

In this embodiment, the control module may receive an opening clutch signal when the drawer ends opening or closing.

When driving the input gear 181 to move toward the clutch position 1845 relative to the connecting member 183, when it is detected that the input gear 181 moves to the clutch position 1845, the motor 143 can be controlled to brake. However, when controlling the motor 143 to brake, due to inertia problems, the input gear 181 will still be driven to continue moving. The greater the speed of the motor 143, the greater the braking process. The longer the input gear 181 moves. If the movement stroke of the input gear 181 is too long, the final resting position of the input gear 181 will exceed the clutch position 1845, or even directly switch from the first linkage position 1843 to the second linkage position 1844, or directly switch from the second linkage position 1844 to The first linkage position is 1843.

Therefore, when receiving the clutch opening signal, the motor 143 is controlled to run at a speed less than the no-load speed of the motor 143, which can reduce the running distance during braking and improve stability.

In one embodiment of the present invention, the preset rotation speed may be less than 90% of the no-load rotation speed of the motor 143 . In this embodiment, the clutch position 1845 can be a region, rather than a point, during the clutch opening process through reasonable settings. The rotation speed of the motor 143 can avoid clutch opening failure, and can also make the input gear 181 finally stay in a better position during the clutch opening process, thereby improving the overall stability.

In one embodiment of the present invention, the rotation speed of the motor 143 can be adjusted by controlling the operating voltage or duty cycle of the motor 143 . The control may be specifically used to: if a clutch opening signal is received, control the operating voltage of the motor 143 to be less than the rated voltage of the motor 143 or control to reduce the PWM duty cycle of the positive voltage end of the motor 143.

In this way, by controlling the operating voltage or duty cycle of the motor 143, the rotation speed of the motor 143 can be quickly and simply reduced to prevent the input gear 181 from exceeding the predetermined position during operation to the clutch position 1845.

Another embodiment of the present invention also provides another method of controlling the opening of a clutch mechanism.

In this embodiment, the control module is used to: when the input gear 181 is in the linkage position, if a clutch opening signal is received, control the motor 143 to drive the input gear 181 to rotate toward the clutch area; when it is detected that the input gear 181 enters the clutch area pre-set When the time is set, the motor 143 is controlled to brake.

In this embodiment, the intersection area of the first cam track 1841 and the second cam track 1842 may form a clutch area, and the clutch area may have an optimal clutch position 1845, and the optimal clutch position 1845 may be the center position of the clutch area. When the input gear 181 moves relative to the connecting piece 183 and enters the clutch area, the connecting rod 1831 disengages from the connecting groove 1821, the transmission between the input gear 181 and the output gear 182 is disconnected, and the input gear 181 is in the entire position relative to the connecting piece 183. When in the clutch area, the transmission is disconnected.

In this embodiment, when it is detected that the input gear 181 enters the clutch area for a preset period of time, the motor 143 is controlled to brake, which can prevent the motor 143 from braking too early and causing the input gear 181 to be unable to move to the optimal clutch position 1845, causing the clutch to open. The closed state is unstable, for example, the clutch protrusion 1811 falls back to the first linkage position 1843 or the second linkage position 1844 along the cam track 184 .

The preset duration may be negatively correlated with the rotational speed of the motor 143 during the clutch opening process. The higher the rotation speed of the motor 143 during the clutch opening process, and the greater the stroke of the input gear 181 during the braking process, the smaller the preset duration may be, thereby improving the overall safety. stability.

It should be understood that although this specification is described in terms of implementations, not every implementation only includes An independent technical solution, this description method in the description is only for the sake of clarity. Those skilled in the art should take the description as a whole. The technical solutions in each embodiment can also be appropriately combined to form a solution that can be understood by those skilled in the art. Other embodiments.

The series of detailed descriptions listed above are only specific descriptions of feasible implementations of the present invention. They are not intended to limit the protection scope of the present invention. Any equivalent implementations or implementations that do not deviate from the technical spirit of the present invention are not intended to limit the protection scope of the present invention. All changes should be included in the protection scope of the present invention.

Claims

A refrigerator, including: a box body, a drawer installed in the box body, a slide rail assembly connecting the drawer and the box body, and a driving assembly for driving the movement of the slide rail assembly;

It is characterized in that the driving assembly includes a motor and a clutch transmission mechanism. The clutch transmission mechanism includes an input gear, an output gear and a connecting piece. The connecting piece has a linkage position and a clutch area, and the input gear is in the clutch area. When the connecting member disconnects the transmission between the input gear and the output gear, when the input gear is in the linkage position, the motor can drive the input gear to rotate toward the clutch area to the desired position. The clutch area, or driving the input gear to rotate away from the clutch area to drive the connecting piece and the output gear to rotate synchronously, and drive the drawer to open or close;

The refrigerator also includes a control module configured to: when the input gear is in the linkage position, if an open clutch signal is received, control the motor to drive the input gear to rotate toward the clutch area; when detecting When the input gear enters the clutch area for a preset time, the motor is controlled to brake.
The refrigerator of claim 1, wherein the linkage position includes a first linkage position and a second linkage position, and the clutch position is between the first linkage position and the second linkage position, so When the input gear is in the clutch position, the motor forwardly drives the input gear to move in the first direction to the first linkage position, and the motor reversely drives the input gear to move in the second direction. The first linkage position; when the input gear is in the first linkage position, the motor forwardly drives the input gear, the connector and the output gear to rotate synchronously to drive the drawer to open, the Reverse rotation of the motor can drive the input gear to move relative to the connector to the clutch position; when the input gear is in the second linkage position, the motor reversely drives the input gear, the connector and The output gear rotates synchronously to drive the drawer to open, and the forward rotation of the motor drives the input gear to move relative to the connecting piece to the clutch position.
The refrigerator of claim 2, wherein the control module is configured to: when receiving a drawer opening signal, control the motor to rotate forward to drive the input gear to rotate in the first direction to drive the The drawer is opened, and when the opening end signal is received, the motor is controlled to reversely drive the input gear to move toward the clutch area at the first linkage position.
The refrigerator of claim 2, wherein the control module is configured to: when receiving a drawer closing signal, control the motor to reversely drive the input gear to rotate in the second direction to drive the The drawer is closed, and when the closing end signal is received, the motor is controlled to rotate forward to drive the input gear to move from the second linkage position to the clutch area.
The refrigerator according to claim 2, wherein a cam track is provided on the surface of the connecting member opposite to the input gear, and a clutch protrusion that cooperates with the cam track is provided on the input gear, and the cam The track includes a first cam track and a second cam track that are symmetrically arranged. The intersection position of the first cam track and the second cam track forms the clutch position. Both ends of the cam track respectively form the first cam track. The linkage position and the second linkage position, the cam track is inclined from the clutch position to the first linkage position and the second linkage position, the connector is also provided with a connecting rod, and the output gear has The input gear rotates to drive the clutch protrusion to move in the cam track, driving the connecting piece to move axially so that the connecting rod matches or disengages from the connecting groove. When the clutch protrusion is in the clutch position, the connecting rod is disengaged from the connecting groove; when the clutch protrusion is in the linkage position, the connecting rod is engaged with the connecting groove.
The refrigerator of claim 5, wherein the clutch transmission mechanism further includes a photoelectric sensor disposed on one side of the connecting piece, and when the clutch transmission mechanism switches between an open state and a closed state, the The photoelectric signal of the photoelectric sensor changes, and the control module is used to determine whether the input gear moves to the clutch position according to the photoelectric signal of the photoelectric sensor.
The refrigerator of claim 1, wherein the preset time length is negatively correlated with the rotational speed of the motor when driving the input gear to move toward the clutch area.
The refrigerator according to claim 1, wherein when it is detected that the input gear enters the clutch area for a preset period of time, energy consumption braking of the motor is controlled.
The refrigerator of claim 7, wherein the control module is further configured to: when the motor rotates forward to drive the drawer to open, if an increase in the motor current is detected, sending an opening end signal.
The refrigerator of claim 7, wherein the control module is configured to: when the motor rotates forward to drive the drawer to open, if the pulse signal of the motor is not detected within a preset time period, Signal the end of opening.