CN112210961A - Rolling bearing and washing machine inner barrel locking mechanism with same - Google Patents

Abstract

The invention discloses a rolling bearing which comprises a bearing main body and a rolling groove, wherein a rolling body is arranged in the rolling groove, the rolling groove is arranged along the axial direction of the bearing main body, and the rolling groove is unevenly arranged on the bearing main body. The invention also discloses a washing machine inner barrel locking mechanism with the rolling bearing. According to the invention, through the non-uniform arrangement of the rolling grooves of the rolling bearing, one side of the bearing main body with more densely arranged rolling grooves is assembled on the stressed inclined side or the side with inclined stress trend of the locking rod, so that the bearing main body can be stressed by multiple rows of rolling bodies on the stressed side, the running reliability of the rolling bearing is improved, and the running reliability of the locking mechanism and the washing machine is further improved.

Description

Rolling bearing and washing machine inner barrel locking mechanism with same

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a rolling bearing and a washing machine inner barrel locking mechanism with the same.

Background

In the existing impeller type washing machine, water permeable holes are formed in an inner barrel, the inner barrel is communicated with an outer barrel, the inner barrel is a washing barrel, the outer barrel is a water containing barrel, the water filled between the inner barrel and the side wall of the outer barrel does not participate in washing, the water really participating in washing is only the part in the inner barrel, so that the waste of water resources is large, and in addition, the concentration of a washing agent/washing powder in washing liquid can be reduced due to excessive water between the inner barrel and the outer barrel. Meanwhile, as water flow frequently enters and exits between the inner barrel and the outer barrel, after the continuous use, the area between the side walls of the inner barrel and the outer barrel also forms a space for storing dirt and dirt, and water scale in tap water, free substances of washing powder, cellulose of clothes, organic matters of human bodies, dust and bacteria brought by the clothes are easily remained between the side walls of the inner barrel and the outer barrel. The mold is a problem that a large amount of dirt accumulated in the long-term used washing machine is bred and propagated because the dirt can not be effectively removed, and if the dirt which can not be seen by a user is not cleaned, bacteria can be attached to clothes after next washing to bring to a human body, so that cross infection is caused.

The application numbers are: 200420107890.8 relates to a full-automatic washing machine, which mainly comprises a box body, a washing and dehydrating barrel, a water containing barrel and a driving device, wherein the water containing barrel is arranged outside the washing and dehydrating barrel and is fixedly connected with the box body, a sealing device is arranged between the bottom surface of the inner wall of the water containing barrel and the bottom surface of the outer wall of the washing and dehydrating barrel, and a sealing cavity is formed in the sealing device; the outer side wall of the washing dehydration barrel is not provided with a through hole, and the bottom of the washing dehydration barrel is provided with a water outlet communicated with the sealed cavity; the water holding barrel is provided with a water outlet communicated with a water drainage pipe, and the water drainage pipe is provided with a water drainage valve. The water containing barrel is fixedly connected with the box body through the hanging rod. One end of the suspender is connected with the inner wall of the upper end of the box body, and the other end of the suspender is connected with the outer wall of the water containing barrel. However, if the water works for a long time, the sealing structure is worn due to long-time operation, so that the water is easily worn and leaked, and if the water quality is poor, the sand content is high, the service life is greatly shortened, and the due function cannot be realized. It is not suitable for use in a state of large washing capacity, and has poor reliability.

The washing machine can be locked by the locking mechanism during washing, a water outlet at the bottom of the inner barrel is controlled to be closed, the water outlet at the bottom of the inner barrel is controlled to be opened during drainage, the locking mechanism is unlocked during dewatering, the inner barrel rotates to dewater, in the control process of the locking mechanism, the locking rod needs to stretch out and retract, the locking rod stretches out and retracts, the motor drives the crank connecting rod to drive the locking rod to move up and down, when the crank rotates to 90 degrees or 270 degrees, the friction force between the locking rod and the slideway is maximum, and the phenomenon that the motor cannot rotate and is clamped due to large friction force can occur.

The present invention has been made in view of this situation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a rolling bearing and a washing machine inner barrel locking mechanism with the rolling bearing.

In order to solve the technical problems, the invention adopts the technical scheme that: a rolling bearing comprises a bearing main body and a rolling groove, wherein rolling bodies are arranged in the rolling groove, the rolling groove is arranged along the axial direction of the bearing main body, and the rolling groove is arranged on the bearing main body in a non-uniform mode.

Furthermore, the bearing main body is provided with at least one stress concentration area, and at least two rolling grooves are formed in the stress concentration area;

preferably, the distance between two adjacent rolling grooves in the stress concentration area is smaller than the distance between two adjacent rolling grooves in other areas;

more preferably, the force concentration areas are arranged in two, and the two force concentration areas are arranged in central symmetry.

Furthermore, the intersection points of two adjacent rolling grooves in the stress concentration area and the cross section of the bearing main body are respectively a point A and a point B, the circle center of the cross section is O, and an angle AOB formed by the point A, the circle center O and the point B is an acute angle;

preferably, the acute angle is 45 degrees.

Furthermore, the bearing main body comprises an inner ring and an outer ring, the rolling groove is formed in the inner ring, one side of the rolling groove protrudes out of the inner wall of the inner ring, and the other side of the rolling groove is in contact with the inner wall of the outer ring.

Furthermore, the rolling grooves comprise an inner rolling groove arranged on the inner wall of the inner ring, an outer rolling groove arranged on the outer wall of the inner ring and two steering rolling grooves communicated with the inner rolling groove and the outer rolling groove, and the rolling grooves formed by the inner rolling groove, the outer rolling groove and the steering rolling grooves can be used for the rolling bodies to circularly reciprocate in the inner rolling groove, the outer rolling groove and the steering rolling grooves.

Furthermore, both ends of the inner rolling groove and the outer rolling groove are communicated with the steering rolling groove, and the steering rolling groove is arranged on the inner side of the end part of the inner ring.

Furthermore, the inner rolling groove axially penetrates through the inner wall of the inner ring, the outer rolling groove axially penetrates through the outer wall of the inner ring, and two ends of the inner ring are provided with stop rings;

preferably, the stop ring is detachably connected to the inner ring.

Furthermore, the rolling groove is filled with a rolling body which is a steel ball;

preferably, the inner ring is made of plastic, and the outer ring is made of metal.

Furthermore, the invention also discloses a washing machine inner barrel locking mechanism with the rolling bearing, which comprises a locking rod capable of axially reciprocating, and a slideway for the locking rod to move, wherein the rolling bearing is arranged between the locking rod and the slideway;

preferably, the rolling body is arranged in contact with the locking rod, and the outer ring is fixedly connected with the slideway.

Furthermore, the stress concentration area is arranged on one inclined side or one inclined side of the locking rod;

preferably, the intersection of the stress concentration area and the cross section of the inner barrel forms an arc line CD and an arc line EF, and a perpendicular bisector of the connection of the midpoints of the arc line CD and the arc line EF passes through the center of the cross section.

After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.

1. The invention discloses a rolling bearing, wherein rolling grooves of the rolling bearing are non-uniformly arranged, a bearing main body is provided with a stress concentration area, the distance between two adjacent rolling grooves in the stress concentration area is smaller than the distance between two adjacent rolling grooves in other areas, when the bearing is assembled with other parts, the stress concentration area corresponds to a bearing stress area, so that the stress of a plurality of rows of rolling bodies is ensured when the bearing is stressed, and the operation reliability of the rolling bearing is ensured.

2. The invention discloses an inner barrel locking mechanism with the rolling bearing, which can effectively reduce the friction force between a locking rod and a slideway and avoid unsmooth locking rod caused by the clamping of the locking rod by the slideway. The crank is guaranteed to rotate to 90 degrees or 270 degrees, namely when the friction force between the locking rod and the slide way is maximum, the locking rod moves smoothly.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view showing a structure of a washing machine according to the present invention;

FIG. 2 is an exploded view of the inner barrel locking mechanism of the present invention;

FIG. 3 is a sectional view of the inner barrel locking mechanism of the present invention;

FIG. 4 is a schematic view of the rolling bearing structure of the present invention;

fig. 5 is a force-bearing schematic diagram of the rolling bearing of the present invention.

In the figure: 100. an inner barrel; 101. an inner barrel body; 102. an inner barrel bottom; 1020. the center of the circle of the bottom of the inner barrel; 103. an inner barrel flange; 104. a balance ring; 105. a water outlet; 106. a drain hole; 200. an outer tub; 201. a first mounting hole; 202. an outer barrel bottom; 204. a second mounting hole; 300. a locking mechanism; 301 a locking hole; 302. a lock lever; 303. a fixed seat; 304. a slideway; 305. a stationary case; 307. sealing sleeves; 308. a first end; 309. a second end; 310. a third end; 320. a boss; 321; a spring; 322. a connecting arm 323, an eccentric wheel; 328. a rotating electric machine; 329. an installation part; (ii) a 340. A rolling bearing; 341. an outer ring; 342. an inner ring; 343. rolling a groove; 344. a rolling body; 400. a drainage control mechanism.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 4, the present invention discloses a rolling bearing 340, which comprises a bearing body and a rolling groove 343, wherein the rolling groove 343 is provided with rolling bodies 344, the rolling groove 343 is arranged along the axial direction of the bearing body, and the rolling groove 343 is arranged on the bearing body in a non-uniform manner. When the rolling bearing 340 is assembled with other parts, the side with the dense rolling grooves 343 is corresponding to the stressed side of the rolling bearing 340, so that the rolling bearing 340 is provided with a plurality of rows of rolling bodies 344 on the stressed side, the stress on each rolling body 344 is reduced, and the operation reliability of the rolling bearing 340 is improved.

As an implementation manner of this embodiment, the bearing body is provided with at least one stress concentration area, and at least two rolling grooves 343 are provided in the stress concentration area. Specifically, the distance between two adjacent rolling grooves 343 in the stress concentration area is smaller than the distance between two adjacent rolling grooves 343 in other areas. At least two rolling grooves 343 are ensured in the stress concentration area of the rolling bearing 340, so that two rows of rolling bodies 344 are stressed when the rolling bearing 340 is stressed, the stress on each rolling body 344 is reduced, and the operation reliability of the rolling bearing 340 is improved.

Further, the stress concentration areas are arranged in two, and the two stress concentration areas are arranged in a centrosymmetric manner. Because the part assembled with the rolling bearing 340 is stressed and inclined on one side and also inclined on the opposite side, so that the opposite two sides of the rolling bearing 340 are stressed, the rolling bearing 340 generally has two-side stress, and two stress concentration areas with symmetrical centers are arranged to deal with the stress conditions on the two sides of the rolling bearing 340.

Specifically, the intersection points of two adjacent rolling grooves 343 in the stress concentration area and the cross section of the bearing main body are respectively a point a and a point B, the center of the cross section is O, and an angle AOB formed by the point a, the center O and the point B is an acute angle; preferably, the acute angle is 45 degrees. One side of the bearing main body is ensured to have at least two rolling grooves 343, and the running stability of the bearing is improved.

As an embodiment of the present embodiment, the bearing body includes an inner ring 342 and an outer ring 341, the rolling groove 343 is provided on the inner ring 342, one side of the rolling groove 343 protrudes from an inner wall of the inner ring 342, and the other side is provided in contact with an inner wall of the outer ring 341. After the rolling groove 343 is filled with the rolling element 344, the outer ring 341 is fitted around the outer part of the inner ring 342, and the rolling bearing 340 can be used. That is, the inner and outer races 341 are designed, and the rolling grooves 343 are provided in the inner race 342, so that the rolling elements 344 can be filled more easily. The rolling bodies 344 have problems, and the inner ring 342 and the outer ring 341 of the rolling groove 343 bearing are detachably sleeved and assembled, so that the maintenance is more convenient. One side of the rolling groove 343 protrudes out of the inner wall of the inner ring 342, so that the rolling body 344 is ensured to be in contact with the outer wall of the component assembled with the rolling bearing 340, rolling friction is generated between the rolling bearing 340 and the component assembled with the rolling bearing 340, and the friction force of the component assembled with the rolling bearing 340 is greatly reduced. The other side of the rolling groove 343 is in contact with the inner wall of the outer ring 341, so that contact between the rolling body 344 and a component assembled with the outer ring 341 of the rolling bearing 340 is avoided, the rolling body 344 is only subjected to one side force, and the rolling body 344 can reciprocate in the rolling groove 343.

As another embodiment of this embodiment, the bearing body is integrally formed, and the rolling groove 343 is disposed on the inner wall of the bearing body along the axial direction of the bearing body, so as to increase the strength of the bearing body.

Further, the rolling grooves 343 include an inner rolling groove 343 provided on an inner wall of the inner race 342, an outer rolling groove 343 provided on an outer wall of the inner race 342, and two turning rolling grooves 343 communicating the inner rolling groove 343 and the outer rolling groove 343, and the rolling grooves 343 composed of the inner rolling groove 343, the outer rolling groove 343, and the turning rolling grooves 343 allow the rolling elements 344 to reciprocate cyclically therein. When the rolling bearing 340 moves along the axial direction, the rolling body 344 can keep rolling friction all the time, so that the movement of the rolling bearing 340 is smoother.

Further, both ends of the inner and outer roller grooves 343 and 343 communicate with a steering roller groove 343, and the steering roller groove 343 is disposed inside an end of the inner race 342. That is, the rolling groove 343 does not penetrate the inner wall of the inner ring 342 in the axial direction, and a stopper structure for preventing the rolling elements 344 from coming out of the rolling groove 343 is not required, so that the number of production steps of the rolling bearing 340 is reduced, and the production efficiency of the rolling bearing 340 is increased.

As an embodiment of the present embodiment, the inner rolling groove 343 is disposed through an inner wall of the inner ring 342, the outer rolling groove 343 is disposed through an outer wall of the inner ring 342, and both ends of the inner ring 342 are provided with stopper rings. The stop ring is detachably connected with the inner ring 342, for example, the stop ring and the inner ring 342 may be in snap connection, or in screw connection, etc. When the inner ring 342 needs to be filled or taken out of the rolling bodies 344, the stop ring can be removed, and when the inner ring 342 is filled with the rolling bodies 344, the stop ring is fixedly connected with the inner ring 342. The stop ring is detachably connected with the inner ring 342, so that the rolling bodies 344 can be replaced and filled conveniently. Or the stop ring is integrally connected with the inner ring 342, so that the connection strength of the stop ring and the inner ring 342 is increased, and the rolling body 344 is prevented from running out of the rolling groove 343 in the movement process due to the loose connection of the stop ring and the inner ring 342.

As a real-time manner of the embodiment, the rolling groove 343 is filled with rolling bodies 344, and the rolling bodies 344 are steel balls; the steel ball is selected as the rolling body 344, on one hand, the steel ball is easy to purchase, on the other hand, the steel ball is high in rigidity and not prone to stress deformation, and therefore the service life of the rolling body 344 is longer.

Further, the inner ring 342 is made of plastic, and the outer ring 341 is made of metal. The inner ring 342 is made of a plastic material, so that the processing of the rolling groove 343 is facilitated, and compared with the processing of the rolling groove 343 on metal, the processing difficulty of the rolling groove 343 is reduced; the outer ring 341 is made of metal, and the outer ring 341 is assembled with other parts, so that certain rigidity of the outer ring 341 is ensured, and the stability of mechanical operation is facilitated.

As shown in fig. 3, the present invention also discloses a locking mechanism of an inner barrel having the above rolling bearing 340, the locking mechanism of the inner barrel comprises a locking rod 302 capable of reciprocating in an axial direction, a slideway 304 for the locking rod to move, and the rolling bearing 340 is arranged between the locking rod 302 and the slideway 304. Specifically, the rolling element 344 is disposed in contact with the lock rod 302, and the outer ring 341 is fixedly connected to the slide rail 304; therefore, the locking rod 302 and the rolling body 344 on the inner wall of the bearing are in rolling friction, the friction force is greatly reduced, and the locking rod 302 is ensured to move smoothly in the linear bearing.

Furthermore, the stress concentration area is arranged on one inclined side or one inclined side of the locking rod 302, so that the rolling bearing 340 is enabled to be provided with multiple rows of rolling bodies 344 under stress on one stressed side, the stress area is increased, the stress on the single rolling body 344 is reduced, the operational reliability of the rolling bearing 340 is improved, and the operational reliability of the locking mechanism is further improved.

As shown in fig. 5, the locking mechanism of the inner tub 100 is subjected to a circumferential force (indicated by an arrow in fig. 5) with the low center 1020 of the circle as the center when the washing machine is operating, so that when the rolling bearing 340 is assembled, the intersection of the stress concentration region and the cross section of the inner tub 100 forms an arc CD and an arc EF, and the perpendicular bisector of the connection of the midpoints of the arc CD and the arc EF passes through the center of the cross section. The rolling bearing 340 is better matched with the locking mechanism.

As shown in figure 1, the invention also discloses a washing machine with the locking mechanism of the inner barrel, the washing machine comprises the inner barrel 100 and the outer barrel 200, the inner barrel 101 has no water leakage hole communicated with the outer barrel, the bottom 102 of the inner barrel is provided with a water drainage hole 105, the upper part of the inner barrel 101 is provided with a circle of water drainage holes 106, the water drainage hole 105 is closed when washing, the water level is lower than the height of the water drainage hole 106, only water exists in the inner barrel 100, no water exists between the inner barrel 100 and the outer barrel 200, after washing, the water drainage hole 105 is opened, most of water is drained from the water drainage hole 105, when dewatering, the inner barrel 100 rotates, water extracted from clothes rises along the barrel wall under the action of centrifugal force, the water is drained from the inner barrel to the space between the inner barrel and the outer barrel through the water drainage hole 106 at the upper part of the inner barrel, and then drained through, meanwhile, dirt cannot be accumulated in an area between the inner barrel and the side wall of the outer barrel, so that the inner barrel and the outer barrel are cleaned, and bacteria are prevented from breeding; in the process of draining water and/or dewatering, the drain outlet 105 is opened, most of water, sediment such as silt, particles and the like are drained into the outer barrel from the lower drain outlet 105, water in clothes is drained into the outer barrel from the drain hole 106 at the upper part of the inner barrel during high-speed rotation dewatering of the inner barrel, and the water is directly drained out of the washing machine from the drain outlet and the drain pipe at the bottom 202 of the outer barrel, so that quick draining is realized, and the draining and pollution discharging effects are good.

The invention sets a drainage control mechanism 400 for controlling the opening/closing of the drainage 105 at the bottom of the drainage 105, the drainage control mechanism 400 is fixed at the bottom of the outer barrel 200, the drainage control mechanism 400 blocks the drainage 105 during water inlet and washing, controls the drainage 105 to close, and the drainage control mechanism 400 controls the drainage 105 to open during drainage and dehydration. The bottom of the inner barrel 100 is provided with a locking mechanism 300, the locking mechanism 300 is fixed on the outer barrel 200, the locking mechanism 300 can firstly position the inner barrel to the position of the water outlet 105 corresponding to the position of the drainage control mechanism 400, then the inner barrel 100 is locked, and the drainage control mechanism 400 seals the water outlet 105. The locking mechanism 300 also effectively prevents the inner tub 100 from rotating and the drain control mechanism 200 controlling the opening/closing of the drain port 105 at the bottom of the inner tub from being disabled when the washing machine is supplied with water and washing water.

The bottom of the inner barrel is provided with a locking hole 301, preferably, the inner barrel flange 103 is provided with the locking hole 301, the locking hole 301 is a blind hole and is not communicated with the inside of the inner barrel, the bottom of the outer barrel is provided with a locking mechanism, the locking mechanism comprises a locking rod 302 capable of axially reciprocating, a slide 304 for the locking rod to move and a driving unit for driving the locking rod to move, the driving unit comprises a connecting rod, a crank and a rotating motor 328, and a bearing 340 is arranged between the locking rod 302 and the slide 304. During washing and rinsing, the locking rod 302 moves upwards and extends into the locking hole 301, the inner barrel 100 is locked and cannot rotate, the drainage control mechanism 400 blocks the drainage outlet 105 at the moment, no water exists between the inner barrel and the outer barrel, the inner barrel 100 is locked to avoid the failure of the drainage control mechanism 400, during dehydration, the locking rod 302 moves downwards and is separated from the locking hole 301, and the inner barrel rotates circumferentially to dehydrate the clothes inside. The reciprocating motion of the locking rod is that the rotating motor 328 drives the crank connecting rod to drive the locking rod to move up and down, when the crank rotates to 90 degrees or 270 degrees, the friction force between the locking rod and the slide way is the largest, and the phenomena that the motor cannot rotate and is clamped due to large friction force can occur.

As shown in fig. 2-3, the locking mechanism further includes a fixing seat 303 of a locking rod 302, a sliding track 304 is disposed in the center of the fixing seat 303, the locking rod 302 passes through the sliding track 304, preferably, the fixing seat 303 is a ring structure, and the center of the fixing seat 303 is bent upward or downward to form the sliding track 304. The bearing 340 is arranged in the slide way 304, preferably, the outer ring of the rolling bearing 340 is in interference fit with the slide way 304, the interference fit is convenient to install, a stepped hole is arranged in the slide way 304, and the diameter sudden change position of the stepped hole is a positioning structure of the rolling bearing 340.

The locking rod is in rolling friction with the rolling body on the inner wall of the rolling bearing, friction force is greatly reduced, smooth movement of the locking rod in the rolling bearing is guaranteed, and normal rotation of the motor is guaranteed.

The upper portion of locking pole is equipped with a boss 320, the lower part of boss 320 is equipped with spring 321, spring 321 one end and the lower surface contact of boss, and the other end is fixed, and when locking pole 302 moved down, spring 321 was compressed. Preferably, the other end of the spring 321 is fixed in contact with the fixed seat 303, and the restoring force of the spring 321 drives the locking rod 302 to move upwards.

The lower extreme of lock pole is connected with the connecting rod of crank connecting rod structure, a rotating electrical machines 328 is connected to the crank, preferably rotating electrical machines 328 sets up in a casing 328, the casing is equipped with an installation department 329, and installation department 329 is installed the lower extreme of fixing base, the center of installation department is equipped with the through-hole that supplies lock pole 302 to pass through.

The downward return movement of the latch lever 302 is driven by the toggle mechanism, and the upward extension of the latch lever 302 is driven by the restoring force of the spring 321 after the toggle mechanism releases the pulling force.

Preferably, the crank is an eccentric wheel 323, an eccentric shaft of the eccentric wheel 323 is hinged with the connecting arm 322, and the center of the eccentric wheel 323 is connected with a motor shaft of a rotating motor 328. The rotating motor 328 rotates a circle of the locking rod to work for a period, and can extend outwards from the retraction state to the locking hole to be locked, and then retract and reset.

The locking mechanism further comprises a fixed shell 305, the fixed shell 305 is mounted on the upper portion of the fixed base 303, is fixedly connected with the fixed base 303, and can be in threaded connection, the locking rod 302 and the slide rail 304 are arranged in the fixed shell 305, and a sealing structure is arranged between the fixed shell 305 and the locking rod 302. The sealing structure is a collapsible structure, preferably a bellows shaped gland 307. One end of the sealing sleeve is connected with the locking rod in a sealing mode, and the other end of the sealing sleeve is connected with the fixed shell in a sealing mode.

The sealing structure is arranged between the locking mechanism and the outer barrel, preferably, a first mounting hole 201 of the locking mechanism is formed in the outer barrel, a fixing seat of the locking mechanism is mounted at the bottom of the outer barrel, a fixing seat 303 is fixed to the outer side of the bottom of the outer barrel 200 through threaded connection such as bolts or screws, a fixing shell of the locking mechanism is mounted in the mounting hole, a sealing structure is arranged between the fixing shell and the mounting hole to guarantee that the position is sealed and cannot leak water, and the sealing structure is an elastic sealing ring.

Preferably, the upper end of the first mounting hole 201 is bent inwards to form a bend, the lower end of the fixing shell is bent outwards to form a bend, the fixing shell 305 extends into the first mounting hole 201, the upper end of the fixing shell 305 abuts against the bend at the upper end of the first mounting hole 201, the end portion of the sealing sleeve arranged between the fixing shell and the locking rod is extruded between the upper end of the fixing shell 305 and the bend at the upper end of the first mounting hole 201 to form a seal, the lower end of the first mounting hole 201 abuts against the bend at the lower end of the fixing shell, and a sealing structure, such as an elastic sealing ring, is arranged between the upper end of the fixing shell 305 and the bend at the.

The sealing structure between the fixing shell 305 and the locking rod 302 is a sealing sleeve 307 which can stretch along with the stretching of the locking rod, the first end 308 of the sealing sleeve 307 is connected with the fixing shell 305 in a sealing manner, preferably, the first end of the sealing sleeve 307 is arranged between the upper end of the fixing shell 305 and the bent upper end of the first mounting hole 201, the sealing sleeve has elasticity to form sealing, the second end 309 is connected with the locking rod 302 in a sealing manner, and preferably, the sealing sleeve is extruded to a boss of the locking rod 302 through a nut to form sealing, so that water in an outer barrel cannot enter the fixing shell, the locking mechanism 300 cannot be damaged, and water leakage cannot be caused. The sealing structure is preferably a bellows-shaped sealing sleeve 307, which has a certain flexibility, is impermeable to water and can also achieve sealing. The sealing sleeve is made of elastic materials, such as rubber sleeve.

A third end 310 extends axially from the second end 309 of the sealing sleeve 307, the third end 310 is connected with the lower end of the fixed housing 305 in a sealing manner, and the extended portion is a sealing sleeve which can be extended and contracted along with the expansion and contraction of the locking rod, and is preferably in a bellows shape. The extended sealing sleeve increases the secondary sealing effect, and even if the sealing above the sealing sleeve goes wrong, the extended sealing sleeve can also play a further sealing effect, so that the safety is improved, and water leakage is avoided. Preferably, the lower end of the stationary housing 305 and the stationary base press the third end 310 to form a seal.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A rolling bearing characterized in that: the rolling bearing comprises a bearing main body and a rolling groove, wherein a rolling body is arranged in the rolling groove, the rolling groove is arranged along the axial direction of the bearing main body, and the rolling groove is unevenly arranged on the bearing main body.

2. Rolling bearing according to claim 1, characterized in that: the bearing main body is provided with at least one stress concentration area, and at least two rolling grooves are formed in the stress concentration area;

preferably, the distance between two adjacent rolling grooves in the stress concentration area is smaller than the distance between two adjacent rolling grooves in other areas;

more preferably, the force concentration areas are arranged in two, and the two force concentration areas are arranged in central symmetry.

3. Rolling bearing according to claim 2, characterized in that: the intersection points of two adjacent rolling grooves in the stress concentration area and the cross section of the bearing main body are respectively a point A and a point B, the circle center of the cross section is O, and an angle AOB formed by the point A, the circle center O and the point B is an acute angle;

preferably, the acute angle is 45 degrees.

4. Rolling bearing according to claim 1, characterized in that: the bearing main body comprises an inner ring and an outer ring, the rolling groove is formed in the inner ring, one side of the rolling groove protrudes out of the inner wall of the inner ring, and the other side of the rolling groove is in contact with the inner wall of the outer ring.

5. Rolling bearing according to claim 4, characterized in that: the rolling grooves comprise inner rolling grooves arranged on the inner wall of the inner ring, outer rolling grooves arranged on the outer wall of the inner ring and two steering rolling grooves for communicating the inner rolling grooves and the outer rolling grooves, and the rolling grooves formed by the inner rolling grooves, the outer rolling grooves and the steering rolling grooves can be used for the rolling bodies to circularly reciprocate in the rolling grooves.

6. Rolling bearing according to claim 5, characterized in that: the two ends of the inner rolling groove and the outer rolling groove are communicated with the steering rolling groove, and the steering rolling groove is formed in the inner side of the end portion of the inner ring.

7. Rolling bearing according to claim 5, characterized in that: the inner rolling groove axially penetrates through the inner wall of the inner ring, the outer rolling groove axially penetrates through the outer wall of the inner ring, and two ends of the inner ring are provided with stop rings;

preferably, the stop ring is detachably connected to the inner ring.

8. Rolling bearing according to claim 4, characterized in that: the rolling groove is filled with a rolling body which is a steel ball;

preferably, the inner ring is made of plastic, and the outer ring is made of metal.

9. A locking mechanism of a washing machine inner tub having the rolling bearing according to any one of claims 1 to 8, characterized in that: the inner barrel locking mechanism comprises a locking rod capable of axially reciprocating and a slideway for the locking rod to move, and the rolling bearing is arranged between the locking rod and the slideway;

preferably, the rolling body is arranged in contact with the locking rod, and the outer ring is fixedly connected with the slideway.

10. The washing machine inner tub locking mechanism of claim 9, wherein: the stress concentration area is arranged on one inclined side or one inclined side of the locking rod;

preferably, the intersection of the stress concentration area and the cross section of the inner barrel forms an arc line CD and an arc line EF, and a perpendicular bisector of the connection of the midpoints of the arc line CD and the arc line EF passes through the center of the cross section.

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