JP6718580B2 - Inner tank lock mechanism and washing machine - Google Patents

Description

The present invention relates to the field of washing machines, and more particularly to an inner tub locking mechanism and a washing machine.

The existing pulsator-type washing machine has a water-permeable hole in the inner tub and allows communication between the inner and outer tubs. Although the inner tub is a washing tub and the outer tub is a water receiving tub, the water in this portion filled between the side walls of the inner tub and the outer tub does not participate in washing. Only the water in the inner tub is involved in washing, which results in a relatively large waste of water resources. In addition, when the amount of water between the inner and outer tubs is excessively high, the concentration of the detergent/powder detergent in the wash liquor also decreases. At the same time, the water flow frequently goes in and out between the inner and outer tanks, so if you continue to use it, the area between the side walls of the inner and outer tanks will become a dirty space, causing tap water stains and powder detergent Free matter, cellulose of clothing, organic matter of human body, dust and bacteria from clothing very easily accumulate between the side walls of the inner tank and the outer tank. These molds propagate because they are a large amount of dirt accumulated inside the washing machine that has been used for a long time and cannot be effectively removed. If these invisible stains are not removed, the next wash will cause bacteria to adhere to the clothing and cause cross-infection problems in the human body.

Chinese Patent No. 200402107890.8 relates to a fully automatic washing machine, which mainly includes a housing, a washing/dehydrating tub, a water receiving tub and a driving device. The water receiving tank is attached to the outside of the washing/dehydrating tank and is fixedly connected to the housing, and a sealing device is provided between the bottom surface of the inner wall of the water receiving tank and the bottom surface of the outer wall of the washing/dehydrating tank. Is formed. There is no through hole in the outer wall of the washing/dehydrating tub, and a drain outlet communicating with the sealed cavity is provided in the bottom portion, a drain outlet communicating with the drain pipe is provided in the water receiving tub, and a drain valve is provided in the drain pipe. The water receiving tank is fixedly connected to the housing by a suspension rod. One end of the suspension rod is connected to the inner wall of the upper end of the housing, and the other end is connected to the outer wall of the water receiving tank. However, if it is operated for a long time, the sealing structure will be worn out for a long time, so that water leakage easily occurs due to wear. If the water quality is relatively poor and the sand content is relatively high, the service life will be significantly shortened and it will not be possible to perform the functions it should have. It is not suitable for use even in the case of large washing capacity, and its reliability is relatively poor.

When washing, the inner tub of the washing machine can be fixed by the lock mechanism, and the drain port at the bottom of the inner tub is controlled to be closed. When draining, the drain port at the bottom of the inner tub is controlled to be opened. At the time of dehydration, the lock mechanism releases the lock, and the inner tank rotates to dehydrate. In the control process of the lock mechanism, the lock shaft needs to expand and contract, and the expansion and contraction of the lock shaft is for the motor to drive the crank rod to move the lock shaft up and down. When the crank is rotated up to 90° or 270°, the frictional force of the lock shaft and the sliding surface is maximum, and the phenomenon that the motor cannot rotate due to the high frictional force appears.

With this in mind, the present invention will be described.

Chinese Patent No. 200402107890.8

An object of the present invention is to overcome the shortage of existing technology, and to provide a locking mechanism for an inner tank in which the reciprocating motion of the lock shaft is smooth.

Another object of the present invention is to provide a washing machine having the above lock mechanism.

In order to achieve the object, the present invention adopts the following technical solutions. The lock mechanism of the inner tank includes a lock shaft that can reciprocate in the axial direction, a sliding surface that is useful for moving the lock shaft, and a drive unit that moves the lock shaft, and the drive unit includes a connecting rod and a crank. And a rotary motor. A bearing is installed between the lock shaft and the sliding surface.

The lock mechanism further includes a fixed base, and a sliding surface is provided at the center of the fixed base. The bearing is installed within the sliding surface, and preferably the outer ring of the bearing is interference fit with the sliding surface.

The bearing is an oil-impregnated bearing, and the oil-impregnated bearing is installed in the sliding surface. The outer ring of the oil-impregnated bearing is fixed to the sliding surface, and the lock shaft is installed on the inner ring of the oil-impregnated bearing.

The bearing is a linear bearing, and the linear bearing is installed in the sliding surface. The outer ring of the linear bearing is fixed to the sliding surface, and the lock shaft is installed on the inner ring of the linear bearing. Preferably, the linear bearing is a rolling bearing.

An idle stroke is provided between the connecting rod and the crank and/or between the connecting rod and the lock shaft.

The idle stroke is a movable space provided along the longitudinal direction of the connecting rod, and the connecting end of the crank and/or the lock shaft moves in the movable space, and the locked state does not change.

The connecting rod is a connecting arm, and hinge holes are provided at both ends of the connecting arm. A hinge hole at one end of the connection arm is hinged to the end of the lock shaft, a hinge hole at the other end of the connection arm is hinged to the crank, and one or two of the hinge holes are elliptical. It is a hole.

The connecting rod includes a connecting arm, a first spring and a slider, one end of the first spring is fixed to the connecting arm, the other end of the first spring is fixed to the slider, and the slider is slidably connected to the connecting arm. It One end of the connecting arm fixed to the first spring is hinged to the lock shaft, and one end of the connecting arm on which the slider is installed is hinged to the crank via the slider.
Preferably, a groove/dropped portion is provided inside the connection arm, and the first spring and the slider are installed in the groove/dropped portion along the longitudinal direction after being connected in series, Is slidably connected to the groove/removed portion. One end of the first spring is fixed to the end of the groove/removed portion, and the other end is fixed to the slider.
Preferably, mounting posts are respectively provided on the end of the groove/removed portion and an end surface of the slider facing the end, and both ends of the first spring are mounted on the mounting posts.
Preferably, the two end surfaces of the mounting column facing each other are sloped surfaces or stepped end surfaces.

A boss is provided above the lock shaft, and a second spring is provided below the boss. One end of the second spring is in contact with the lower surface of the boss, the other end is fixed and the second spring is compressed when the lock shaft moves downward. Preferably, the other end of the second spring is fixed to the fixing base.

A washing machine having the lock mechanism.

Adopting the above technical solution of the present invention brings the following beneficial effects.
1. In the present invention, a bearing is installed between the lock shaft and the sliding surface to reduce the frictional force between the lock shaft and the sliding surface, and prevent the lock shaft from becoming stuck on the sliding surface and becoming unsatisfactory. When the crank rotates up to 90° or 270°, that is, when the friction force of the lock shaft and the sliding surface is maximum, it is guaranteed that the motion of the lock shaft is smooth.

2. When the lock mechanism of the present invention is provided with an idle stroke and the lock shaft is extended, it is not inserted into the lock hole, and when the lock mechanism receives an error signal that the lock shaft is caught at the bottom of the inner tank, it rotates. The motor moves the crank or connecting rod within the idle stroke. After the maximum point at which the motor is driven, the motor continues to move the lock shaft down and back into its original position before proceeding to the next operating cycle. The motor or the bottom of the inner tub is not damaged, there is no need to manually adjust or dismantle the washing machine for maintenance, the washing machine is prevented from malfunctioning, and the user does not feel unnecessary annoyance.

Hereinafter, a mode for carrying out the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a structural diagram of a washing machine of the present invention. FIG. 2 is a three-dimensional view of the lock mechanism of the present invention. FIG. 3 is a sectional view of the lock mechanism of the present invention. FIG. 4 is a schematic diagram of the position of the lock shaft in the present invention. FIG. 5 is a schematic view of another position of the lock shaft according to the present invention. FIG. 6 is a schematic view of another position of the lock shaft according to the present invention. FIG. 7 is a schematic view of another position of the lock shaft according to the present invention. FIG. 8 is a structural diagram of a drive unit for a lock shaft according to another embodiment of the present invention. FIG. 9 is a structural diagram of the bearing of the present invention. FIG. 10 is a sectional view of the bearing of the present invention.

As shown in FIG. 1, the washing machine of the present invention includes an inner tub 100 and an outer tub 200, the inner tub body 101 does not have a hole communicating with the outer tub, and the inner tub bottom 102 is provided with a drain port 105. A drainage hole 106 is provided around the upper part of the inner tank body 101. During washing, the drainage port 105 is closed and the water level is lower than the height of the drainage hole 106. Only the inner tank 100 has water, and there is no water between the inner tank 100 and the outer tank 200. After the washing is finished, the drainage port 105 is opened, most of the water is drained from the drainage port 105, the inner tub 100 is rotated during the dehydration, and the water dehydrated from the clothes flows along the tub wall by the action of centrifugal force. Rise. After passing through the drain hole 106 in the upper portion of the inner tank, the water is discharged from the inner tank to the space between the inner and outer tanks, and further discharged from the outer tank drain port of the outer tank 200. Thus, during washing, the washing water is stored only in the inner tub 100, and there is no washing water between the inner and outer tubs, thus saving the amount of water used. At the same time, dirt does not accumulate in the region between the side walls of the inner tank and the outer tank, so that the space between the inner tank and the outer tank is clean and the growth of bacteria is prevented. During the drainage and/or dehydration process, the drainage port 105 opens, and most of the sediment such as water, earth and sand, and granules is discharged from the lower drainage port 105 into the outer tank. The water in the clothes is discharged to the outer tub from the drain hole 106 in the upper part of the inner tub when the inner tub is rotated at high speed, and is directly discharged to the outside of the washing machine from the drain port and the drain pipe of the outer tub bottom 202. Achieves rapid drainage and has a good drainage and dirt discharge effect.

In the present invention, a drainage control mechanism 400 that controls opening/closing of the drainage port 105 is installed at the bottom of the drainage port 105, and the drainage control mechanism 400 is fixed to the bottom of the outer tank 200. At the time of water intake and washing, the drainage control mechanism 400 closes the drainage port 105 and controls the drainage port 105 to close, and at the time of drainage and dehydration, the drainage control mechanism 400 controls the drainage port 105 to open. A lock mechanism 300 is installed at the bottom of the inner tank 100, and the lock mechanism 300 is fixed to the outer tank 200. The lock mechanism 300 can lock the inner tank 100 after orienting the inner tank so that the positions of the drain outlet 105 and the drain control mechanism 400 correspond to each other, and the drain control mechanism 400 closes the drain outlet 105. .. The lock mechanism 300 effectively prevents the inner tub 100 from rotating and the drainage control mechanism 400 that controls the opening/closing of the drainage port 105 at the bottom of the inner tub not to operate during water intake and washing of the washing machine. Can also

The lock hole 301 is installed at the bottom of the inner tank, and preferably the lock hole 301 is installed in the flange 103 of the inner tank. The lock hole 301 is a blind hole, does not communicate with the inside of the inner tank, and has a lock mechanism installed at the bottom of the outer tank. The lock mechanism includes a lock shaft 302 that can reciprocate in the axial direction, a sliding surface 304 that is useful for moving the lock shaft, and a drive unit that moves the lock shaft. The drive unit includes a connecting rod and a crank. And a rotary motor. A bearing 304 is installed between the lock shaft 302 and the sliding surface 304. During washing and rinsing, the lock shaft 302 moves upward and is inserted into the lock hole 301, and the inner tub 100 is fixed and cannot rotate. At this time, the drainage control mechanism 400 blocks the drainage port 105 and there is no water between the inner and outer tanks. The inner tank 100 is fixed, and it is possible to prevent the drainage control mechanism 400 from not working. At the time of dehydration, the lock shaft 302 moves downward and separates from the lock hole 301, and the inner tub rotates in the circumferential direction to dehydrate the clothes inside. The reciprocating motion of the lock shaft is that the rotary motor drives the crank rod to move the lock shaft up and down. When the crank rotates up to 90° or 270°, the frictional force of the lock shaft and the sliding surface is maximum, and the phenomenon that the motor cannot rotate due to the high frictional force appears. In the present invention, a bearing is installed between the lock shaft and the sliding surface to reduce the frictional force between the lock shaft and the sliding surface, and prevent the lock shaft from becoming stuck on the sliding surface and becoming unsatisfactory.

The lock mechanism further includes a fixed base 303 of the lock shaft 302, a slide surface 304 is provided at the center of the fixed base 303, and the lock shaft 302 passes through the slide surface 304. Preferably, the fixed base 303 has an annular structure, and the center of the fixed base 303 is bent upward or downward to form the sliding surface 304. The bearing 340 is installed in the sliding surface 304, preferably the outer ring of the bearing 340 is interference fit with the sliding surface 304, and the fitting of the interference fit is convenient. The portion where the stepped hole is provided in the sliding surface 304 and the diameter of the stepped hole suddenly changes is the stereotactic structure of the bearing 340.

Specifically, the bearing 340 is an oil-impregnated bearing, and the oil-impregnated bearing is installed in the sliding surface. The outer ring of the oil-impregnated bearing is fixed to the sliding surface, the lock shaft is installed on the inner ring of the oil-impregnated bearing, and the lubricating oil overflows when the lock shaft and the oil-impregnated bearing rub. In this way, the frictional force between the lock shaft and the oil-impregnated bearing is significantly reduced, which ensures that the lock shaft moves smoothly in the oil-impregnated bearing and that the motor rotates normally.

Alternatively, the bearing 340 is a linear bearing, and the linear bearing is installed in the sliding surface. The outer ring of the linear bearing is fixed to the sliding surface, and the lock shaft is installed on the inner ring of the linear bearing. Preferably, the linear bearing is a rolling bearing, and has a steel ball on the inner wall of the linear bearing. In this way, the steel balls on the lock shaft and the inner wall of the bearing rub against each other, the frictional force is significantly reduced, and it is ensured that the lock shaft moves smoothly in the linear bearing and that the motor rotation is normal. To do.

A boss 320 is provided above the lock shaft, and a second spring 321 is provided below the boss 320. One end of the second spring 321 contacts the lower surface of the boss, the other end is fixed, and the second spring 321 is compressed when the lock shaft 302 moves downward. Preferably, the other end of the second spring 321 is fixed in contact with the fixing base 303, and the restoring force of the second spring 321 moves the lock shaft 302 upward.

The lower end of the lock shaft is connected to a connecting rod having a crank rod structure, the crank is connected to a rotary motor 324, and preferably the rotary motor 324 is installed in a housing 328. An attachment portion 329 is provided on the housing, the attachment portion 329 is attached to the lower end of the fixed base, and a through hole through which the lock shaft 302 passes is provided at the center of the attachment portion.

The downward movement of the lock shaft 302 to the original position is due to the crank rod structure. The lock shaft 302 extends upward due to the restoring force of the second spring 321 after the crank rod structure releases the tensile force.

Preferably, the crank is an eccentric wheel 323, an eccentric shaft of the eccentric wheel is hinged to the connecting rod, and a center of the eccentric wheel is connected to a motor shaft of a rotary motor. When the rotary motor makes one revolution, the lock shaft operates for one cycle, extends outward from the retracted state to the lock hole, is locked, and then can be retracted back to the original position.

When the lock mechanism receives an error signal that the lock shaft 302 is extended but is not inserted into the lock hole 301, the lock shaft 302 supports the other positions of the bottom portion of the inner tank. Since the other positions of the inner tank bottom are lower than the lock hole 301 and the lock shaft 302 does not rise to the highest point, the lock shaft is caught at the inner tank bottom. At this time, the rotary motor 324 also moves the lock shaft upward, the motor is restrained and does not move, and the motor is burned. At this time, the lock shaft cannot return to the original position, it cannot proceed to the next operation cycle, it needs to be adjusted manually, and further it is necessary to dismantle the inner tank and proceed to the next operation cycle. is there.

To solve the above problem, the lower end of the lock shaft 302 is connected to a connecting rod having a crank rod structure, and an idle stroke is provided between the connecting rod and the crank and/or between the connecting rod and the lock shaft. The idle stroke is a movable space provided along the longitudinal direction of the connecting rod, and the connecting end of the crank and/or the lock shaft moves in the movable space, and the locked state does not change. When the lock mechanism receives an error signal that the lock shaft is extended but is not inserted into the lock hole 301, the lock shaft 302 supports other positions of the bottom of the inner tank. Since the other position of the inner tank bottom is lower than the lock hole and the lock shaft 302 does not rise to the highest point, the lock shaft 302 is caught at the inner tank bottom, and at this time, the rotary motor also drives the lock shaft 302. At this time, since the lock shaft is caught at the bottom of the inner tank, an idle stroke provided between the connecting rod and the crank and/or between the connecting rod and the lock shaft starts to operate, and the rotary motor idles the crank or the connecting rod. Move within the stroke. After the maximum point at which the motor is driven, the motor continues to move the lock shaft down and back into its original position before proceeding to the next operating cycle. The motor or the bottom of the inner tub is not damaged, there is no need to manually adjust or dismantle the washing machine for maintenance, the washing machine is prevented from malfunctioning, and the user does not feel unnecessary annoyance.

The idle stroke is a distance that can be shortened along the longitudinal direction of the connecting rod. When the lock shaft 302 cannot be driven, the contractable space is contracted. After the maximum point at which the motor is driven, the motor continues to move the lock shaft down and back into its original position before proceeding to the next operating cycle.

The idle stroke can be provided by an elliptical hole 331. The connecting rod is a connecting arm 330, and hinge holes are provided at both ends of the connecting arm 330. A hinge hole at one end of the connecting arm is hinged to an end of the lock shaft 302, a hinge hole at the other end of the connecting arm is hinged to the crank, and one or two of the hinge holes are elliptical. 331 of the hole. When the lock shaft cannot be driven, the elliptical hole provides a constant displacement of displacement, allowing the motor to rotate to the highest point of drive. The motor continues to move the lock shaft downwards back to its original position and again to the next operating cycle.

Alternatively, the idle stroke can be provided by a spring. When the lock shaft 302 cannot be driven, the spring provides a constant displacement of displacement, allowing the motor to rotate to the highest point of drive. The motor continues to move the lock shaft downwards back to its original position and again to the next operating cycle. The connecting rod includes a connection arm 330, a first spring 332, and a slider 334. One end of the first spring 332 is fixed to the connection arm 330 and the other end of the first spring 332 is fixed to the slider 334. Is slidably connected to the connection arm 330. One end of the connection arm 330 fixed to the first spring 332 is hinged to the lock shaft 302, and one end of the connection arm 330 on which the slider is installed is hingedly connected to the crank via a slider 334. When the lock shaft 302 supports other positions on the bottom of the inner tank and cannot be driven, the slider 334 slides on the connecting arm to compress the first spring 332 and drive the motor to the highest point. Rotate until. The motor continues to move the lock shaft 302 downwards back to its original position and again to the next operating cycle.

A groove/dropped portion 339 is provided inside the connection arm, and the first spring 332 and the slider 334 are installed in the groove/dropped portion 339 along a longitudinal direction after being connected in series. The slider 334 is slidably connected to the groove/missed portion 339. One end of the first spring is fixed to the end of the groove/missed portion 339, and the other end is fixed to the slider 334.
Preferably, mounting posts 335 are respectively provided at the end of the groove/removed portion 339 and the end face of the slider facing the end, and both ends of the first spring are mounted on the mounting post 335. To be done.
Preferably, the two end surfaces of the mounting column 335 facing each other are sloped or stepped end surfaces. In a situation where the amount of compression is guaranteed, it is possible to reliably ensure that the first spring and the mounting column are the longest to assemble, which ensures the mounting of the spring. It does not pop out easily when compressed, saves space and occupies the least space in the height direction compared to flat end faces.

The lock mechanism further includes a position switch 336, and a position switch starting structure is installed on the lock shaft 302. When the lock shaft 302 is inserted into the lock hole 301 and locked at a predetermined position, the activation structure activates the position switch, and the position switch 336 transmits a predetermined position lock signal. When the lock shaft is pulled back and disengaged from the lock hole and returned to the original position, the activation structure activates the position switch, the predetermined position unlock signal is transmitted, and the main control panel of the washing machine controls the washing machine. And proceed to the program for the next process.

The position switch 336 is fixedly installed on a sliding surface outside the lock shaft 302. Because of the fixed installation, the activation structure is installed on the lock shaft 302 and moves together with the lock shaft 302. When the lock shaft 302 is inserted into and/or disengaged from the lock hole 301, the lock shaft actuation structure actuates the position switch, and a lock shaft insertion and/or disengagement signal is transmitted. The position of the lock shaft is utilized to accurately determine whether the lock shaft is locked at a predetermined position or unlocked at the predetermined position, the determination is accurate, and the structure is simple.

The position switch 336 is a contact switch, and the contact of the contact switch is on the lock shaft 302 side. The contact-side side surface of the lock shaft includes at least two side surfaces that are perpendicular to the contact and have different distances. When the lock shaft is inserted into the lock hole and locked at a predetermined position, one side surface of the lock shaft comes into contact with the contact, and the contact switch is activated to transmit a predetermined position lock signal. When the lock shaft is pulled back and disengaged from the lock hole and returned to the original position, the side surface at the other end comes into contact with the contact, the contact switch is activated and the predetermined position unlock signal is sent, and the main control panel of the washing machine Controls the washing machine to advance to the next step program. The connecting portion of the two side surfaces is an inclined transition surface. In the process of pulling back the lock shaft, the contact contacts the inclined transition surface. A sloping transition surface is provided to ensure a smooth switch when the two sides come into contact with the contacts and prevent the lock shaft from becoming stuck.

The lock shaft 302 is a pillar, and may be a triangular pillar or a polygonal pillar, and includes at least a first lock part 337 and a second lock part 338. The diameters of the first lock portion 337 and the second lock portion 338 are different, and the diameter of the first lock portion 337 is larger than the diameter of the second lock portion 338. When the lock shaft 302 is inserted into the lock hole 301 and locked at a predetermined position, the first lock portion 337 comes into contact with the contact, the contact switch is activated, and the predetermined position lock signal is transmitted. When the lock shaft 302 is pulled back and disengaged from the lock hole and returned to the original position, the second lock portion 338 comes into contact with the contact, the contact switch is activated and the predetermined position unlock signal is transmitted, and the main of the washing machine The control panel controls the washing machine to advance to the next process program. Alternatively, when the lock shaft 302 is inserted into the lock hole and locked at a predetermined position, the second lock portion 338 comes into contact with the contact, the contact switch is activated, and the predetermined position lock signal is transmitted. When the lock shaft 302 is pulled back and disengaged from the lock hole and returned to the original position, the first lock portion 337 comes into contact with the contact, the contact switch is activated and the predetermined position unlock signal is transmitted, and the main of the washing machine The control panel controls the washing machine to advance to the next process program. The connecting portion of the first lock portion and the second lock portion smoothly transitions. In the process of pulling back the lock shaft, the contact contacts the inclined transition surface. A sloping transition surface is provided to ensure smooth switching when locks and contacts of different diameters come into contact and prevent the lock shaft from becoming stuck.

Preferably, the lock shaft 302 is a cylindrical body, convenient for fitting with the lock hole, and more easily inserted into the lock hole to lock the inner tank. The upper part of the lock shaft is the first lock part 337, and the lower part of the lock shaft is the second lock part 338. When the lock shaft is inserted into the lock hole and locked at a predetermined position, the second lock portion comes into contact with the contact, the contact switch is activated, and the predetermined position lock signal is transmitted. When the lock shaft is pulled back and disengaged from the lock hole and returned to the original position, the first lock portion comes into contact with the contact, the contact switch is activated, and the predetermined position unlock signal is transmitted. The diameter of the first lock portion is larger than the diameter of the second lock portion, and the portion where the diameter changes changes smoothly due to the slope, and in the process of pulling back the lock shaft, the contact contacts the inclined transition surface.
Alternatively, the position switch 336 is a sensor switch. The activation structure is a signal transmitter, which is installed on the lock shaft and moves together with the lock shaft 302. The sensor switch is fixedly installed outside the lock shaft, and since the sensor switch is fixedly installed, the sensitive portion of the sensor switch is on the lock shaft side. When the lock shaft is inserted into and/or removed from the lock hole, the signal transmission unit that transmits the insertion and/or removal of the lock shaft corresponds to the sensing unit of the sensor switch, and the sensor switch is activated and locked. Sending shaft insert and/or leave signals. The position of the lock shaft is used to accurately determine whether the lock shaft is locked in a predetermined position or unlocked in a predetermined position, the determination is accurate, and the structure is simple. The signal transmitter may be a magnetic signal, a photoelectric signal or a microwave signal transmitter.

A lock signal transmitter and an unlock signal transmitter are installed on the lock shaft 302. When the lock shaft 302 is inserted into the lock hole 301 and locked at a predetermined position, the lock signal transmitter faces the sensitive portion of the sensor switch, and the sensor switch receives the lock signal transmitted by the lock signal transmitter. , Send a lock signal to the main control panel. When the lock shaft disengages from the lock hole and is pulled back to its original position, the unlock signal transmission unit faces the sensitive portion of the sensor switch, and the sensor switch receives the unlock signal transmitted by the unlock signal transmission unit. Then, the unlock signal is transmitted to the main control panel.

A sliding surface 304 is provided outside the lock shaft to guide the lock shaft 302 to move along the direction of the sliding surface 304 and be conveniently inserted into the lock hole 301. The position switch 336 is installed in the side wall of the sliding surface or at the end of the sliding surface. When installed in the side wall of the sliding surface, the inner wall of the sliding surface is provided with a removed portion for mounting the position switch, and the position switch 336 is mounted in the removed portion.

The position switch 336 is installed in the side wall of the sliding surface of the fixed base 303, or installed at the end of the sliding surface. Preferably, the position switch 336 is installed in a through hole in the mounting portion 329 of the housing 328 of the rotary motor 324 that allows the lock shaft 302 to pass therethrough, and a position where the position switch 336 is attached to the side wall of the through hole. Is provided. Wiring is convenient for installation in a portion near the rotary motor, and the wiring with the wiring of the rotary motor can be performed together.

The lock mechanism further includes a fixed case 305, and the fixed case 305 is attached to an upper portion of the fixed base 303, fixedly connected to the fixed base 303, and may be a screw connection. The lock shaft 302 and the sliding surface 304 are installed in a fixed case 305, and a sealing structure is installed between the fixed case and the lock shaft 302. The sealing structure is a structure capable of expanding and contracting, and is preferably a bellows-shaped sealing cover 307. One end of the sealing cover is sealingly connected to the lock shaft, and the other end is sealingly connected to the fixed case.

A sealing structure is provided between the lock mechanism and the outer tank, and preferably the first tank mounting hole 201 of the lock mechanism is provided in the outer tank. The fixed base of the lock mechanism is attached to the bottom of the outer tub, and the fixed base 303 is fixed to the outside of the bottom of the outer tub 200 by a screw connection such as a screw or a bolt. The fixed case of the lock mechanism is mounted in the mounting hole, and a sealing structure is provided between the fixed case and the mounting hole to ensure that the part is sealed and does not leak water. The sealing structure is an elastic seal ring.

Preferably, the upper end of the first mounting hole 201 is bent inward to be bent, and the lower end of the fixed case is bent outward to be bent. When the fixed case 305 is inserted into the first mounting hole 201, the upper end of the fixed case 305 supports the bending of the upper end of the first mounting hole 201. The end of the sealing cover installed between the fixed case and the lock shaft is pushed out between the upper end of the fixed case 305 and the upper end of the first mounting hole 201 to form a seal. The lower end of the first mounting hole 201 supports the bending of the lower end of the fixed case, and a sealing structure such as an elastic seal ring is installed between the two.

The sealing structure between the fixed case 305 and the lock shaft 302 is a seal cover 307 that can expand and contract as the lock shaft expands and contracts. The first end 308 of the hermetic cover 307 is hermetically connected to the fixed case 305, and preferably the first end of the hermetic cover 307 is installed between the upper end of the fixed case 305 and the upper end of the first mounting hole 201. The sealing cover is elastic and forms a seal. The second end 309 is sealingly connected to the lock shaft 302, preferably by applying pressure to the boss of the lock shaft 302 with a nut to form a seal. In this way, the water in the outer tank does not enter the fixed case, the lock mechanism 300 is not destroyed, and water leakage does not occur. Preferably, the sealing structure is a bellows tube-shaped sealing cover 307, which has a certain elasticity, is impermeable to water itself, and can also realize sealing. The sealing cover is a sealing cover made of an elastic material, such as a rubber cover.

The second end 309 portion of the sealing cover 307 extends the third end 310 along the axial direction, and the third end 310 is hermetically connected to the lower end of the fixed case 305. The stretched portion is a sealing cover that can expand and contract with the expansion and contraction of the lock shaft, and preferably has a bellows tube shape. The stretched sealing cover adds a secondary sealing action, so that even if there is a problem with the sealing of the upper surface, the stretched sealing cover can exert a further sealing action, improving safety and preventing water leakage. To do. Preferably, the lower end of the fixed case 305 and the fixed base push out the third end to form a seal.

The above descriptions are merely preferred modes of implementing the present invention. It should be pointed out that a person skilled in the art can make some modifications and improvements without departing from the principle of the present invention, but this should be regarded as the protection scope of the present invention.

100 Inner Tank 101 Inner Tank Body 102 Inner Tank Bottom 103 Inner Tank Flange 104 Balance Ring 105 Drainage Port 106 Drainage Hole 200 Outer Tank 201 First Mounting Hole 202 Outer Tank Bottom 204 Second Mounting Hole 300 Lock Mechanism 301 Lock Hole 302 Lock Shaft 303 Fixed base 304 Sliding surface 305 Fixed case 306 Seal ring 307 Sealing cover 308 1st end 309 2nd end 310 3rd end 320 Boss 321 2nd spring 323 Eccentric ring 324 Rotation motor 328 Enclosure 329 Attachment part 330 Connection arm 331 Ellipse -Shaped hole 332 First spring 334 Slider 335 Mounting post 336 Position switch 337 First lock part 338 Second lock part 339 Groove 340 Bearing

Claims (11)

It includes a lock shaft that can reciprocate along the axial direction, a sliding surface that is useful for moving the lock shaft, and a drive unit that moves the lock shaft, the drive unit including a connecting rod, a crank, and a rotary motor. a locking mechanism of the inner tank, the bearing is installed between the sliding surface and the lock shaft,
A lock mechanism, wherein an idle stroke is provided between the connecting rod and the crank and/or between the connecting rod and the lock shaft . The inner tank lock according to claim 1, wherein the lock mechanism further includes a fixed base, the sliding surface is provided at a center of the fixed base, and the bearing is installed in the sliding surface. mechanism. The lock mechanism for the inner tub according to claim 2, wherein the outer ring of the bearing is interference fit with the sliding surface. The bearing is an oil-impregnated bearing, the oil-impregnated bearing is installed in the sliding surface, the outer ring of the oil-impregnated bearing is fixed to the sliding surface, the lock shaft is installed in the inner ring of the oil-impregnated bearing, The lock mechanism for the inner tank according to claim 1 or 2. Said bearing is a linear bearing, said linear bearing is installed in the sliding surface, the outer ring of the linear bearing is fixed to the sliding surface, the lock shaft and characterized in that it is installed in the inner ring of the linear bearing The lock mechanism for the inner tank according to claim 1 or 2. The idle stroke is a longitudinal movable space provided along the connecting rod, the crank and / or the connecting end of the lock shaft is moving at the moving space, wherein the lock state is not changed The locking mechanism for the inner tank according to claim 1 . The connecting rod is a connecting arm, and hinge holes are provided at both ends of the connecting arm, and a hinge hole at one end of the connecting arm is hinge-connected to an end of the lock shaft, and a hinge at the other end of the connecting arm. The locking mechanism for the inner tank according to claim 6, wherein the hole is hinge-connected to the crank, and one or two of the hinge holes are elliptical holes. The connecting rod connecting arms, first comprises a spring and a slider, one end of the first spring is fixed to the connecting arm, the other end of said first spring is fixed to the slider, said slider and said connecting arm slid connected, one end being fixed to said first spring in said connecting arm is connected the lock shaft and the hinge, one end said slider in said connecting arm is installed, the crank hinged through said slider is the characterized in that, the inner tank of the locking mechanism according to claim 6. A groove/dropped portion is provided inside the connection arm, and the first spring and the slider are installed in the groove/dropped portion along a longitudinal direction after being connected in series, and the slider is provided with the groove. 9. The slide spring is connected to the pulled-out portion, one end of the first spring is fixed to the end of the groove/dropped portion, and the other end is fixed to the slider. Lock mechanism of the inner tank of the. Boss provided in an upper portion of the lock shaft, a second spring is provided in a lower portion of the boss, one end of the second spring is in contact with the lower surface of the boss, the other end is fixed, the locking shaft is below when motion, the second spring is compressed, the other end of the second spring is characterized in that it is fixed and the fixed base, the inner tank of the locking mechanism according to any one of claims 2-8 .. Washing machine having a locking mechanism according to any one of claims 1-10.

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