CN110409124B - Decelerating clutch for washing machine and assembling method thereof - Google Patents

Abstract

The invention discloses a speed reduction clutch for a washing machine, which comprises a shell, a brake wheel and an inner cylinder shaft connected with the brake wheel or an internal gear train of the brake wheel, wherein a first bearing is arranged between the brake wheel and the shell, and a second bearing is arranged between the inner cylinder shaft and the shell.

Description

Decelerating clutch for washing machine and assembling method thereof

Technical Field

The invention relates to a component in a household appliance and the household appliance, in particular to a speed reduction clutch for a washing machine and an assembling method thereof.

Background

The prior art discloses a speed reduction clutch for a washing machine, wherein a front bearing is installed at an inner cylinder shaft at the inner cylinder side, and a rear bearing is installed on an oil seal cover shaft at the motor side. The front end of the brake wheel is pressed on the inner cylinder shaft, the rear end of the brake wheel is fixed on an oil sealing cover (a brake wheel cover) through a pressure riveting process, and a transmission gear is arranged in the brake wheel and is generally called as a gear box. In actual model machine operation, it is not hard up to appear braked wheel and oil seal cover riveting department, cause the inner tube axle to rock greatly, inner tube and urceolus friction, the big and big problem of vibration of noise appears, in actual work, braked wheel and inner tube axle all rock easily, in the research and development design before, we will realize carrying out stable design to inner structure between braked wheel and bearing frame or two bearings of installation between inner tube axle and the bearing frame, however, the experiment proves that only can not play good support shockproof effect at braked wheel or the epaxial installation bearing of inner tube.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a speed reduction clutch for a washing machine, wherein a first bearing for supporting and preventing the brake wheel from shaking is arranged on the brake wheel, a second bearing for supporting and preventing the inner cylinder shaft from shaking is arranged on the inner cylinder shaft, and the speed reduction clutch has a better supporting and shaking preventing effect on the internal structure of the speed reduction clutch through the design of the first bearing and the second bearing.

In order to solve the technical problems, the invention adopts the technical scheme that the basic concept is as follows:

the utility model provides a speed reduction clutch for washing machine, including casing, braked wheel and with the inner tube axle that braked wheel or the inside train of braked wheel are connected, install first bearing between braked wheel and the casing, the inner tube axle with install the second bearing between the casing.

In the above scheme, aiming at the braked wheel set up the first bearing that supports and prevent it from rocking, aiming at the inner tube axle set up the second bearing that supports and prevent it from rocking, through the design of first bearing and second bearing, have better support to speed reduction separation and reunion inner structure and prevent the effect of rocking.

Preferably, the housing comprises a bearing seat, one end of the brake wheel close to the inner cylinder extends into the bearing seat and is installed in the bearing seat, the inner cylinder shaft penetrates through the bearing seat and is installed on the brake wheel, a first bearing is installed between the part, located in the bearing seat, of the brake wheel and the bearing seat, and a second bearing is installed between the inner cylinder shaft and the bearing seat.

In the above scheme, the inner cylinder shaft passes through the bearing seat and is tightly matched with one end of the brake wheel, namely, the inner side of the brake wheel is in interference fit with the outer side of the inner cylinder shaft, the inner side of the brake wheel and the outer side of the inner cylinder shaft are connected into a whole, at the moment, bearings are respectively arranged between the inner cylinder shaft and the bearing seat and between the brake wheel and the bearing seat, the brake wheel and the inner cylinder shaft which are connected into a whole are limited from different positions, and the supporting and anti-shaking device has a good supporting and anti-shaking effect.

Preferably, one end of the brake wheel, which is close to the inner cylinder, is narrowed to form a sleeve portion, the sleeve portion extends into the bearing seat, the bearing seat comprises a first bearing seat and a second bearing seat, the first bearing is installed between the first bearing seat and the sleeve portion, and the second bearing is installed between the second bearing seat and the inner cylinder shaft.

In the scheme, the sleeve part is suitable for being inserted and installed in the bearing seat, so that the brake wheel and the first bearing are convenient to install and match. Wherein the sleeve part and the inner ring of the first bearing can be in interference fit or clearance fit.

Preferably, the first bearing seat and the second bearing seat have different inner diameters and are respectively used for mounting a first bearing and a second bearing with different sizes.

In the above-described aspect, the outer diameter of the sleeve portion of the brake wheel is larger than the outer diameter of the inner cylindrical shaft, so that the distance between the inner wall of the bearing housing and the outer wall of the sleeve portion is smaller than the distance between the inner wall of the bearing housing and the outer wall of the inner cylindrical shaft, and therefore the first bearing and the second bearing which are purposely designed have inner diameters of different sizes, so that the first bearing and the second bearing are suitable for mounting bearings of different sizes, respectively.

Preferably, the inner diameter of the first bearing seat is smaller than that of the second bearing seat, the first bearing seat is communicated with the second bearing seat, a first step surface in connection transition is formed at the communication position of the first bearing seat and the second bearing seat, and the end surface of the side part of the second bearing abuts against the first step surface.

In the above aspect, preferably, the balls of the first bearing and the balls of the second bearing face each other in a circumferential direction, and the inner ring portion and the outer ring portion face each other, so that when the first bearing and the second bearing are in contact with each other, the first bearing and the second bearing are prevented from easily interfering with each other during operation.

Preferably, the first bearing seat and/or the sleeve part is/are provided with a first limiting structure for limiting the installation position of the first bearing; and a second limiting structure for limiting the installation position of the second bearing is arranged on the second bearing seat or at the communication position between the second bearing and the first bearing.

In the above scheme, the limiting structures for limiting the installation positions of the first bearing and the second bearing are respectively arranged, so that the assembling process is facilitated.

Preferably, the first limiting structure comprises a second step surface formed by inward projection of an inner wall of one end of the first bearing seat far away from the inner cylinder, and the end surface of the side part of the first bearing abuts against the second step surface;

preferably, the first stopper structure further includes a third step surface formed by radially outwardly projecting an end of the sleeve portion remote from the inner tube, a side end surface of the first bearing outer ring abuts against the second step surface, and a side end surface of the first bearing inner ring abuts against the third step surface.

In the above scheme, through the design of the second step surface and the third step surface, when the first bearing is assembled, the first bearing is directly pressed into the first bearing seat from the inner cylinder side until the first bearing abuts against the second step surface and the third step surface, and then the first bearing is stopped, so that the first bearing can be assembled quickly.

Preferably, the first stepped surface and/or an end surface of the sleeve portion constitute the second stopper structure, a side end surface of the second bearing outer ring abuts against the first stepped surface, and a side end surface of the second bearing inner ring abuts against an end surface of the sleeve portion.

In the above aspect, when the second bearing is assembled after the first bearing is assembled, the second bearing is pressed into the bearing seat until the second bearing abuts against the first step surface and/or the end surface of the sleeve portion. It can be seen that the design of these limit structures facilitates the quick assembly of the bearing.

Preferably, the first bearing comprises at least one rolling bearing/composite bearing, and the second bearing comprises at least one rolling bearing/composite bearing;

in the scheme, in order to improve the supporting effect on the brake wheel, the length of the sleeve part of the brake wheel is increased, two or more than two rolling bearings are arranged on the sleeve part, and only one rolling bearing is arranged on the inner cylinder shaft, so that the brake wheel can be well supported and protected, and meanwhile, the supporting and anti-shaking effect on the inner cylinder shaft is also improved because the brake wheel and the inner cylinder shaft are in tight fit.

The most preferable scheme is that the first bearing and the second bearing respectively comprise two rolling shafts or the first bearing and the second bearing respectively comprise a composite bearing, such as a double-row angular contact ball bearing, a double-row tapered roller bearing, a four-row tapered roller bearing and the like.

Preferably, the end surfaces of two adjacent bearings between the first bearing and the second bearing are in direct contact or have a certain gap.

The present invention also provides a method of assembling the above speed reduction clutch, comprising the steps of:

s1, pressing a first bearing into a bearing seat arranged on a shell;

s2, pressing one end of a brake wheel into the bearing seat to be matched with the inner ring of the first bearing;

s3, pressing a second shaft into a bearing seat arranged on the shell;

and S4, the inner cylinder shaft penetrates through the bearing seat to be installed on the brake wheel, and the inner cylinder shaft limits the positions of the first bearing and the second bearing and prevents the first bearing and the second bearing from being separated from the bearing seat.

In the scheme, the inner cylinder shaft is designed to be small in diameter at one side and large in diameter at the other side, a part of shaft body with the small diameter of the inner cylinder shaft penetrates through the bearing seat to be installed on the brake wheel and is tightly matched with the brake wheel, the part of shaft body with the large diameter of the inner cylinder shaft is located on one side, close to the inner cylinder, of the second bearing, and the diameter of the section of shaft body is larger than the inner diameter of the inner ring of the second bearing, so that the first bearing and the second bearing are limited in the bearing seat, and the second bearing and the first bearing are prevented from being separated from the bearing seat.

After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the invention relates to a speed reduction clutch for a washing machine, which comprises a shell, a brake wheel and an inner cylinder shaft connected with the brake wheel or a gear train inside the brake wheel, wherein a first bearing is arranged between the brake wheel and the shell, and a second bearing is arranged between the inner cylinder shaft and the shell.

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 and are incorporated in and constitute a part of this application, illustrate embodiment(s) 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 also be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural view of a reduction clutch for a washing machine according to the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic rear view of a reduction clutch for a drum washing machine according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of section B-B of FIG. 3 in an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of section C-C of FIG. 3 in an embodiment of the present invention;

FIG. 6 is an exploded view of a speed reduction clutch for a drum washing machine according to an embodiment of the present invention;

fig. 7 is a schematic side view of a speed reduction clutch for a drum washing machine according to an embodiment of the present invention.

In the figure: 1. a housing; 11. a bearing seat; 111. a first bearing housing; 112. a second bearing housing; 2. a first bearing; 3. a second bearing; 4. a brake wheel; 41. a sleeve portion; 5. a first step surface, 6, a second step surface; 7. a third step surface; 8. an inner cylindrical shaft; 9. washing the shaft; 10. a rear bearing; 12. a clutch sleeve; 13. sealing an oil cover; 14. a clutch spring; 15. a seal ring; 1002. A motor; 1003. a clutch meshing sleeve; 1004. a clutch fixing disc; 1008. a wheel train; 1009. a shifting fork; 1010. a large bearing seat; 1011. a small bearing seat; 1012. a mounting cavity; 1013. a rear bearing; 1014. a front bearing; 1015. fastening a bolt; 1016. A positioning column; 1017. a screw post; 1018. an installation part; 1019. inserting ribs; 1110. a positioning groove section; 1111. positioning the opening; 1112. extending the ribs; 1113. assembling ribs; 1114. prying the bolt; 1115. positioning a groove; 1116. supporting the platform; 1021. A rotor; 1022. an engagement groove; 1023. meshing the ribs; 1030. a return spring; 1031. outer ring meshing teeth; 1032. clamping the ribs; 1033. inner meshing teeth; 1034. meshing teeth; 1035. an elastic pad; 1036. a circular ring; 1037. a covering part; 1041. inner ring meshing teeth; 42. a position sensor; 82. a planet carrier; 83. a sun gear; 84. a first planet gear; 85. a second planet wheel; 86. an inner gear ring; 811. external gear teeth; 91. connecting ribs; 92. and (7) limiting ribs.

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 rather to illustrate it for those skilled in the art by 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", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, 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" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; 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.

Example one

Referring to fig. 1-2, the present embodiment provides a decelerating clutch for a washing machine, including a housing 1, a brake wheel 4, and an inner drum shaft 8 connected to the brake wheel 4 or an internal gear train of the brake wheel 4, wherein a first bearing 2 is installed between the brake wheel 4 and the housing 1, and a second bearing 3 is installed between the inner drum shaft 8 and the housing 1.

In the scheme, the brake wheel 4 is provided with the first bearing 2 for supporting and preventing the brake wheel from shaking, the inner cylinder shaft 8 is provided with the second bearing 3 for supporting and preventing the inner cylinder shaft from shaking, and the design of the first bearing 2 and the second bearing 3 has a better supporting and shaking-preventing effect on the internal structure of the speed reduction clutch.

Preferably, the housing 1 includes a bearing seat 11, one end of the brake wheel 4 close to the inner cylinder is inserted into the bearing seat 11, the inner cylinder shaft 8 passes through the bearing seat 11 and is mounted on the brake wheel 4, a first bearing 2 is mounted between the part of the brake wheel 4 located in the bearing seat 11 and the bearing seat 11, and a second bearing 3 is mounted between the inner cylinder shaft 8 and the bearing seat 11.

In the above scheme, the inner cylinder shaft 8 passes through the bearing seat 11 and is tightly matched with one end of the brake wheel 4, namely, the inner side of the brake wheel 4 and the outer side of the inner cylinder shaft 8 are in interference fit, the inner side of the brake wheel and the outer side of the inner cylinder shaft are connected into a whole, the inner cylinder shaft 8 and the bearing seat 11 and the brake wheel 4 and the bearing seat 11 are respectively provided with a bearing at the moment, the brake wheel 4 and the inner cylinder shaft 8 which are connected into a whole are limited at different positions, and a good supporting and anti-shaking effect is achieved.

Preferably, one end of the brake wheel 4 close to the inner cylinder is narrowed to form a sleeve portion 41, the sleeve portion 41 extends into the bearing seat 11, the bearing seat comprises a first bearing seat 111 and a second bearing seat 112, the first bearing 2 is installed between the first bearing seat 111 and the sleeve portion 41, and the second bearing 3 is installed between the second bearing seat 112 and the inner cylinder shaft 8.

In the above solution, the sleeve portion 41 is adapted to be inserted and mounted in the bearing housing 11, facilitating the mounting and mating of the headblock 4 with the first bearing 2. Wherein the sleeve portion 41 may be an interference fit or a clearance fit with the inner race of the first bearing 2. On the other hand, in the embodiment, the first bearing seat 111 and the second bearing seat 112 are designed integrally, and form an integral structure, so that the stability is good.

Preferably, the first bearing seat 111 and the second bearing seat 112 have different inner diameters, and are used for mounting the first bearing 2 and the second bearing 3 having different sizes, respectively.

In the above-described aspect, the outer diameter of the sleeve portion 41 of the braked wheel 4 is larger than the outer diameter of the inner cylindrical shaft 8, so that the distance between the inner wall of the bearing housing 11 and the outer wall of the sleeve portion 41 is smaller than the distance between the inner wall of the bearing housing 11 and the outer wall of the inner cylindrical shaft 8, and therefore, in order to accommodate this structure, the first bearing 2 and the second bearing 3 are purposely designed to have inner diameters of different sizes so that they are suitable for mounting bearings of different sizes, respectively.

Preferably, the inner diameter of the first bearing seat 111 is smaller than the inner diameter of the second bearing seat 112, the first bearing seat 111 and the second bearing seat 112 are communicated, a first step surface 5 for connecting and transitioning is formed at the communication position of the first bearing seat and the second bearing seat, and the side end surface of the second bearing abuts against the first step surface 5.

In the above-described aspect, preferably, the balls of the first bearing 2 and the balls of the second bearing 3 are located at opposite positions on one circumference, and the inner race portion and the outer race portion are also located at opposite positions, respectively, so that when the first bearing 2 and the second bearing 3 are in contact with each other, the first bearing 2 and the second bearing 3 are prevented from being easily interfered with each other during the rotation operation.

Preferably, the first bearing seat 111 and/or the sleeve portion 41 are/is provided with a first limit structure for limiting the installation position of the first bearing; and a second limiting structure for limiting the installation position of the second bearing is arranged on the second bearing seat 112 or at the communication position between the second bearing 3 and the first bearing 2.

In the above scheme, the limiting structures for limiting the installation positions of the first bearing 2 and the second bearing 3 are respectively arranged, so that the assembling process is facilitated.

Preferably, the first limiting structure comprises a second step surface 6 formed by inward projection of the inner wall of one end of the first bearing seat 111 far away from the inner cylinder, and the end surface of the side part of the first bearing abuts against the second step surface 6;

preferably, the first stopper structure further includes a third step surface 7 formed by radially outwardly projecting an end of the sleeve portion 41 remote from the inner tube, a side end surface of the first bearing outer ring abuts against the second step surface 6, and a side end surface of the first bearing inner ring abuts against the third step surface 7.

In the above-described aspect, by designing the second step surface and the third step surface, when the first bearing 2 is assembled, the first bearing 2 is directly pressed into the first bearing housing 111 from the inner cylinder side until the first bearing 2 abuts against the second step surface 6 and the third step surface 7, and then stops, so that the first bearing 2 can be assembled quickly.

Preferably, the first stepped surface 5 and/or an end surface of the sleeve portion 41 constitute the second stopper structure, a side end surface of the outer ring of the second bearing 3 abuts against the first stepped surface 5, and a side end surface of the inner ring of the second bearing abuts against an end surface of the sleeve portion 41.

In the above-described aspect, when the second bearing 3 is assembled after the first bearing 2 is assembled, the second bearing 3 is pressed into the bearing seat 11 until the second bearing 3 comes into contact with the first step surface 5 and/or the end surface of the sleeve portion 41. It can be seen that the design of these limit structures facilitates the quick assembly of the bearing.

Preferably, the first bearing comprises at least one rolling bearing/composite bearing, and the second bearing comprises at least one rolling bearing/composite bearing;

in the above-mentioned scheme, in order to improve the supporting effect to the braked wheel 4, lengthen the length of the sleeve part 41 of the braked wheel 4, set up two or more antifriction bearings on the sleeve part 41, and set up only one antifriction bearing on the inner cylinder axle 8, thus can have good support protection to the braked wheel 4 each other, because the braked wheel 4 and inner cylinder axle 8 are close-fitting, therefore also improved the support anti-sway effect to the inner cylinder axle 8.

The most preferable scheme is that the first bearing and the second bearing respectively comprise two rolling shafts or the first bearing and the second bearing respectively comprise a composite bearing, such as a double-row angular contact ball bearing, a double-row tapered roller bearing, a four-row tapered roller bearing and the like.

Preferably, the end surfaces of two adjacent bearings between the first bearing and the second bearing are in direct contact or have a certain gap.

It should be noted that other structures of the speed reduction clutch (such as an oil seal cover, a clutch spring, a clutch sleeve, etc.) are the same as those in the prior art, or are described in the previous patent, which belong to the prior art and are not described herein again.

Example two

The invention provides a method suitable for assembling the speed reduction clutch in the first embodiment, which comprises the following steps:

s1, pressing and installing a first bearing 2 into a bearing seat 11 of a shell 1;

s2, one end of a brake wheel 4 is pressed into the bearing seat 11 and is matched with the inner ring of the first bearing 2;

s3, pressing and installing the second bearing 3 into a bearing seat 11 of the shell 1;

and S4, mounting the inner cylinder shaft 8 on the brake wheel 4 through the bearing seat 11, and limiting the positions of the first bearing 2 and the second bearing 3 by the inner cylinder shaft 8 to prevent the first bearing and the second bearing from being separated from the bearing seat 11.

In the above scheme, the inner cylinder shaft 8 is designed to have a small diameter on one side and a large diameter on the other side, a part of the shaft body with the small diameter of the inner cylinder shaft 8 passes through the bearing seat and is mounted on the brake wheel 4 to be tightly matched with the brake wheel 4, the part of the shaft body with the large diameter of the inner cylinder shaft 8 is positioned on one side, close to the inner cylinder, of the second bearing, and the diameter of the section of the shaft body is larger than the inner diameter of the inner ring of the second bearing, so that the first bearing and the second bearing are limited in the bearing seat, and the second bearing and the first bearing are prevented from being separated from the bearing seat.

Further, in this embodiment, the speed reduction clutch further includes a sealing ring 15, an installation portion is disposed at an opening of the bearing seat located at one end of the inner cylinder, and the sealing ring 15 is installed on the installation portion to plug the opening;

preferably, the inner wall and the outer wall of bearing frame be located open-ended border department is all caved in, forms the installation department, sealing washer 15 be the loop configuration, the periphery border of loop configuration is provided with the annular mounting groove, inner circle sealing connection inner tube axle 8 of sealing washer 15, the border of sealing washer 15 passes through the annular mounting groove cover establish install the installation department on.

The step of mounting the seal ring 15 is between steps S3 and S4.

EXAMPLE III

The third embodiment is different from the first embodiment in that, in the third embodiment, the first bearing and the second bearing may be the same size bearing or the first bearing is larger than the second bearing, at this time, the inner diameter of the first bearing seat 111 is larger than the inner diameter of the second bearing seat 112, the first bearing is press-fitted into the first bearing seat 111 from the motor side of the washing machine, the second bearing is press-fitted into the second bearing seat 112 from the inner cylinder side of the washing machine, the first bearing and the second bearing are transited by a step surface, the step surface constitutes a limit part of the first bearing, one end of the first bearing is abutted against the transition part to realize mounting and positioning, then the sleeve part of the brake wheel is press-fitted onto the inner ring of the first bearing, in order to prevent the first bearing from having displacement to the motor side of the washing machine, a limit structure may be provided at the root of the sleeve part of the brake wheel, therefore, the position of the first bearing is limited and the first bearing is prevented from being separated from the bearing seat (the first bearing seat 111), for example, the root of the sleeve part protrudes upwards to form a step surface, the inner ring of the first bearing abuts against the step surface, the step surface limits the position of the first bearing and prevents the first bearing from being displaced, and for the installation of the second bearing, the end surface abuts against the end surface of the first bearing, the first bearing limits the installation position of the second bearing, of course, a limit structure is specially arranged in the second bearing seat 112, for example, a limit convex ring is formed on the side of the second bearing close to the first bearing in a protruding mode, the side end surface of the second bearing abuts against the limit convex ring, and the limit convex ring plays a role of limiting the second bearing, and simultaneously separates the first bearing and the second bearing and prevents the first bearing and the second bearing from interfering in movement.

Example four

Referring to fig. 3 to 7, the embodiment provides a speed reduction clutch for a drum washing machine, which comprises a housing 1, wherein the housing 1 is assembled and connected with the bottom of an outer drum of the washing machine so as to fixedly mount the speed reduction clutch on the drum washing machine; a motor 1002 including a rotatable rotor 1021 to provide a rotational force to a drum and a pulsator of the drum washing machine; a mounting cavity 1012 is arranged in the shell 1, a brake wheel 4 is arranged in the mounting cavity 1012, and a wheel train 1008 is arranged in the brake wheel 4; one end of a washing shaft 9 is meshed with the motor rotor 1021, the other end of the washing shaft passes through a wheel train 1008 arranged in the shell 1, and the washing shaft is meshed and connected with a wave wheel of the drum washing machine; one end of the inner drum shaft 8 is meshed with the wheel train 1008, and the other end is meshed with the drum of the drum washing machine; the wheel train 1008 is also provided with an oil seal cover 13, the oil seal cover 13 is respectively meshed with the clutch meshing sleeve 1003 and other components in the wheel train 1008, the clutch meshing sleeve 1003 can move along the axial direction of the washing shaft 9 under the action of a clutch driving device so as to be respectively meshed with the motor rotor 1021 for co-rotation or meshed with a clutch fixing sleeve arranged on the shell 1 for braking, and the purposes of performing differential rotation of the inner cylinder and the impeller when the roller washing machine performs a washing procedure and performing the co-rotation of the inner cylinder and the impeller when the roller washing machine performs a dehydration procedure are achieved.

In the embodiment of the invention, the gear train 1008 comprises a planetary carrier 82, a first planetary gear 84 and a second planetary gear 85 which are engaged with each other are mounted on the planetary carrier 82, the first planetary gear 84 is engaged with a central sun gear 83, the second planetary gear 85 is engaged with an inner gear ring 86, the sun gear 83 is fixedly mounted on the washing shaft 9 and rotates together with the washing shaft 9, the inner gear ring 86 is fixedly connected with the inner cylinder shaft 8, and the planetary carrier 82 is fixedly connected with the oil seal cover 13.

When the washing machine executes the dewatering program, the transmission mode of the speed reduction clutch is as follows:

at the moment, the clutch meshing sleeve is meshed with the motor rotor and separated from the shell; the motor rotor simultaneously drives the motor shaft and the clutch meshing sleeve to rotate at the same speed, and the motor shaft directly drives the impeller to rotate at the same speed as the motor rotor; the clutch engaging sleeve drives the input shaft sleeve to rotate at the same speed, the input shaft sleeve drives the planet wheel carrier to rotate at the same speed, at the moment, the sun wheel is driven by the motor shaft to rotate at the same speed, so that the first planet wheel and the second planet wheel do not rotate, the planet wheel carrier directly drives the inner gear ring to rotate at the same speed through the second planet wheel, the inner gear ring drives the roller shaft to rotate at the same speed, and then the roller is driven to rotate at the same speed as the motor rotor, so that the roller and the impeller rotate at the same speed.

When the washing machine executes the washing program, the transmission mode of the speed reduction clutch is as follows:

at the moment, the clutch meshing sleeve is separated from the motor rotor and fixed with the shell; the motor rotor only drives the motor shaft to rotate independently, and the motor shaft directly drives the impeller to rotate at the same rotating speed as the motor rotor; at the moment, the planet wheel carrier is fixed with the shell through the clutch shaft sleeve, the sun wheel is driven by the motor shaft to rotate at the same speed, the first planet wheel is driven to rotate at different speeds and different directions, the first planet wheel drives the second planet wheel to rotate at different speeds and different directions, the second planet wheel drives the inner gear ring to rotate at different speeds and different directions, the inner gear ring drives the roller shaft to rotate, and then the roller is driven to rotate at the same rotating speed and the same rotating direction as the motor rotor, so that the roller and the impeller rotate at different speeds.

Through the arrangement, the motor rotor of the drum washing machine can controllably distribute and output the driving acting force through the speed reduction clutch, the aim of controlling the drum and the impeller of the drum washing machine to execute common-speed rotation or differential-speed rotation is achieved, and the effect that the drum washing machine can correspondingly execute a washing process and a dehydration process by utilizing the speed reduction clutch to controllably adjust the rotation states of the drum and the impeller is further achieved.

In the embodiment of the invention, a shell 1 of the speed reduction clutch comprises a large bearing seat 1010, a brake wheel 4 arranged in a large bearing seat 1010 installation cavity 1012 and a wheel train 1008 arranged in the brake wheel 4, wherein an open end of the brake wheel 4 close to one side of a motor is hermetically installed on a small bearing seat 1011, and a rear bearing 1013 is installed in the small bearing seat 1011; the other side of the large bearing seat 1010 opposite to the open end of the mounting cavity 1012 is provided with a front bearing 1014 (the front bearing may be the first bearing and the second bearing in the first embodiment, or the bearings in fig. 4 or 5). The rear bearing 1013 is in limited supporting contact with the oil seal cover 13, and the front bearing 1014 is in limited supporting contact with the inner cylinder shaft 8. Therefore, the purpose that the bearings are respectively arranged at the front end and the rear end of the shell to effectively support the roller is achieved. Meanwhile, as the washing shaft 9 is engaged with the sun gear 83, the first planet gear 84, the second planet gear 85 and the ring gear 86 in sequence, the ring gear 86 is fixedly connected with the inner cylinder shaft 8, and the planet carrier 82 is fixedly connected with the oil seal cover 13, the back bearing 1013 and the front bearing 1014 can directly transmit the supporting acting force to the washing shaft 9, so as to realize effective support of the motor shaft.

EXAMPLE five

As shown in fig. 3 and fig. 4, the present embodiment describes a decelerating clutch for a drum washing machine, which includes a large bearing seat 1010, a mounting cavity 1012 is provided on the large bearing seat 1010 (the large bearing seat includes a housing, a first bearing seat 111 and a second bearing seat 112 in the first embodiment, the present embodiment is described in different angles), a brake wheel 4 disposed in the large bearing seat mounting cavity 1012 and a wheel train 1008 disposed in the brake wheel 4, a front bearing 1014 for positioning and supporting an outlet end of a washing shaft 9 penetrating into the washing machine is mounted at a first end of the mounting cavity 1012 along an axial direction; installation cavity 1012 is along the uncovered setting of axis direction's second end, and uncovered department detachable installs little bearing frame 1011, little bearing frame 1011 on install the confession and wear to the inside motor shaft penetrating end location support's of installation cavity 1012 front bearing 1014.

The speed reduction clutch shell is provided with the large bearing seat and the small bearing seat which are fixedly connected through the bolts, so that the speed reduction clutch shell is quickly assembled and disassembled, and the assembly efficiency of the speed reduction clutch is improved; meanwhile, the speed reduction clutch shell is assembled in a screw disassembling and assembling mode, so that the structural complexity of the device can be effectively simplified, and the production cost can be reasonably reduced.

In this embodiment, one side of the small bearing seat 1011 is correspondingly attached and sealed with the open side of the large bearing seat 1010, and the sealed and attached position is fixedly mounted by at least one fastening bolt sequentially passing through the small bearing seat 1011 and the large bearing seat 1010.

In this embodiment, the small bearing seat 1011 is an annular structure with an outer peripheral diameter larger than the diameter of the opening of the large bearing seat installation cavity 1012, the small bearing seat 1011 and the installation cavity 1012 are coaxially arranged, a plurality of through holes are uniformly distributed on the small bearing seat 1011 around the axis, and the distance between each through hole and the axis of the small bearing seat 1011 is larger than the radius of the opening of the large bearing seat 1010 installation cavity 1012; the large bearing seat 1010 is provided with a disc-shaped mounting part 1018 which extends outwards and radially from the outer wall of the mounting cavity 1012, the mounting part 1018 is provided with bolt holes which are arranged in one-to-one correspondence with the through holes, and the penetrating end of each fastening bolt 1015 penetrates through the small bearing seat 1011 from the corresponding through hole and then is in threaded engagement with the corresponding bolt hole on the large bearing seat 1010; preferably, the distance between each through hole and the axis of the small bearing seat 1011 is equal.

In this embodiment, the small bearing seat 1011 is provided with an insertion rib 1019 protruding and extending toward the large bearing seat 1010, the insertion rib 1019 encloses a circumference shape corresponding to the opening of the installation cavity 1012, and the outer circumference side of the circumference-shaped insertion rib 1019 is in corresponding sealing fit with the inner wall of the opening of the installation cavity 1012.

In this embodiment, the inner wall surface of the open end of the mounting cavity 1012 is provided with a positioning groove section 1110 with an increased radial distance, the diameter of the inner wall surface of the positioning groove section 1110 is as large as the diameter of the outer circumferential surface of the insertion rib 1019, or the positioning groove section 1110 and the outer circumferential surface of the insertion rib 1019 are in interference fit, and the insertion end of the insertion rib 1019 is in contact with the inner end surface of the positioning groove section 1110 close to the center side of the mounting cavity 1012 so as to position the insertion position of the small bearing seat 1011; preferably, the outer side of the end of the insertion rib 1019 is provided with a chamfer, and the inner side of the outer end face of the positioning groove section 1110 is provided with a chamfer.

In this embodiment, at least one positioning notch 1111 is disposed at the outer periphery of the small bearing seat 1011, and a positioning rib matched with the positioning notch 1111 is disposed on the large bearing seat 1010, so that the positioning rib is inserted into the positioning notch 1111 when the small bearing seat 1011 is fixedly mounted on the large bearing seat 1010.

In this embodiment, a coaxially disposed shaft sleeve is sleeved on the periphery of the penetrating end of the washing shaft 9, the shaft sleeve forms an inner cylinder shaft 8, one end of the inner cylinder shaft 8 is engaged with the wheel train 1008, the other end of the inner cylinder shaft passes through the large bearing seat 1010 and then is engaged with the drum of the washing machine, and the periphery of the inner cylinder shaft 8 is limited and supported by the front bearing 1014; the periphery of the penetrating end of the washing shaft 9 is sleeved with a coaxially arranged oil sealing cover 13, one end of the oil sealing cover 13 is meshed with the wheel train 1008, the other end of the oil sealing cover 13 penetrates through a small bearing seat 1011 and then is meshed or separated with the motor rotor 1021 controllably through a clutch meshing sleeve 1003, and the periphery of the oil sealing cover 13 is limited and supported with a rear bearing 1013; the wash shaft 9 passes through headblock 4 and engages a train 1008 within headblock 4.

In this embodiment, a circle of extending ribs 1112 extending along the axis of the mounting cavity 1012 is disposed at the first end of the mounting cavity 1012, and a bearing mounting portion for mounting the front bearing 1014 is defined by the inner circumferential walls of the extending ribs 1112; the inner periphery of the annular small bearing seat 1011 is provided with a circle of assembling ribs 1113 extending along the axis of the mounting cavity 1012, and the inner peripheral wall of the assembling ribs 1113 forms a bearing mounting part for assembling the rear bearing 1013.

In this embodiment, the front bearing 1014 includes at least two mutually independent bearings, each of which is sequentially mounted in a bearing mounting portion surrounded by an inner circumference of an extension rib 1112 provided at a first end of a mounting cavity 1012 of the large bearing seat 1010 along an axial direction of the washing shaft 9; and/or, the rear bearing 1013 comprises at least two mutually independent bearings, and each bearing is sequentially installed in a bearing installation part formed by the inner periphery of the assembling rib 1113 arranged on the small bearing seat 1011 along the axial direction of the washing shaft 9.

EXAMPLE six

As shown in fig. 3 and fig. 6, the present embodiment describes a decelerating clutch for a drum washing machine, which includes a large bearing seat 1010, a mounting cavity 1012 is provided on the large bearing seat 1010, a mounting portion 1018 protruding and extending radially outwards is provided on an outer wall of the mounting cavity 1012, a brake wheel 4 disposed in the mounting cavity 1012 of the large bearing seat 1010 and a wheel train 1008 disposed in the brake wheel 4, a front bearing 1014 for positioning and supporting a penetrating end of a washing shaft 9 penetrating into the washing machine is mounted at a first end of the mounting cavity 1012 along an axial direction; installation cavity 1012 is along the open setting of second end of axis direction, uncovered department detachable installs little bearing frame 1011, little bearing frame 1011 on be equipped with run through the setting, with the corresponding screw hole of big bearing frame 1010 periphery installation department, be equipped with in the screw hole and supply to pry the internal thread of bolt 1114 looks thread engagement, pry the tip that bolt 1114 stretched into the screw hole and the installation department 1018 of big bearing frame 1010 spacing conflict mutually in order to pry little bearing frame 1011 and big bearing frame 1010 phase separation.

Through set up the screw hole that can supply the installation of prying bolt on little bearing frame to realize twisting the prying bolt back on little bearing frame, prying the big bearing frame of bolt conflict, and then reach the purpose that the utilization stretched into the prying bolt in the little bearing frame screw hole with little bearing frame and big bearing frame quick disassembly separation.

In this embodiment, the small bearing seat 1011 is provided with a screw column 1017 extending along the axial direction of the washing shaft 9 and having a certain thickness, and the screw column 1017 is provided with a screw hole penetrating along the axial direction.

In this embodiment, the small bearing seat 1011 one side corresponds with the open side of the large bearing seat 1010 to be attached and sealed, the sealed joint is fixedly mounted with the large bearing seat 1010 through at least one fastening bolt 1015 passing through the small bearing seat 1011, the screw column 1017 is arranged on the small bearing seat 1011 on the opposite side of the sealed joint face, and the screw column 1017 is arranged at the sealed joint of the small bearing seat 1011 and the large bearing seat 1010.

In this embodiment, a disc-shaped mounting portion 1018 is disposed on the large bearing seat 1010 and extends radially outward from an outer wall of the mounting cavity 1012, and at least a portion of a screw hole disposed on the screw column 1017 and the disc-shaped mounting portion 1018 are correspondingly overlapped in a direction parallel to an axial direction of the washing shaft 9, so that an end portion of a prying bolt extending into the screw hole is in contact with the large bearing seat in a propping manner, and a purpose that the prying bolt pries the small bearing seat away from the large bearing seat is achieved.

In this embodiment, a plurality of screw columns 1017 are arranged on the periphery of the small bearing seat 1011, and each screw column 1017 is arranged in a different radial direction of the small bearing seat 1011; the axes of the screw holes arranged on the screw columns 1017 are all parallel to the axis of the washing shaft 9; preferably, the screw columns 1017 are arranged at the outer circumference of the small bearing seat 1011 at equal angular intervals.

In this embodiment, the large bearing seat 1010 is provided with a support platform 1116 corresponding to each screw hole provided on the small bearing seat 1011, the support platform 1116 and the screw hole are correspondingly overlapped in the axial direction of the screw hole, and the outer end surface of the support platform 1116 is a plane perpendicular to the axial line of the screw hole; preferably, the end surface of the screw hole near the large bearing seat 1010 is correspondingly attached to the outer end surface of the abutment platform 1116.

In the embodiment, internal threads are arranged on the inner wall surface of the screw hole, the prying bolt 1114 which is engaged with the threads is arranged in the screw hole, and the axial length of a screw rod of the prying bolt 1114 is greater than that of the screw hole, so that the prying bolt which extends into the screw hole can be limited and abutted against the large bearing seat, and the small bearing can be pried; preferably, the end of the screw rod of the prying bolt 1114 is a plane, so as to increase the contact area between the prying bolt and the large bearing seat and improve the prying action strength.

EXAMPLE seven

As shown in fig. 3 and fig. 6, in the present embodiment, a speed reduction clutch for a drum washing machine is described, which includes a large bearing seat 1010, a mounting cavity 1012 is provided on the large bearing seat 1010, a mounting portion 1018 protruding and extending radially outward is provided on an outer wall of the mounting cavity 1012, a brake wheel 4 disposed in the mounting cavity 1012 of the large bearing seat 1010 and a wheel train 1008 disposed in the brake wheel 4, a front bearing 1014 for positioning and supporting a penetration end of a washing shaft 9 penetrating into the washing machine is mounted at a first end of the mounting cavity 1012 along an axial direction; the second end of installation cavity 1012 along the axis direction is uncovered setting, and uncovered department detachable installs little bearing frame 1011, little bearing frame 1011 on be equipped with to the protruding reference column 1016 that extends of big bearing frame 1010 direction, be equipped with on the big bearing frame 1010 with reference column 1016 matched with constant head tank 1115.

The positioning columns which are correspondingly inserted with the large bearing seats are arranged on the small bearing seats, so that the only assembly position between the small bearing seats and the large bearing seats is realized; and positioning and assembling are carried out by utilizing the positioning columns, so that the effects of quick and accurate positioning and buckling installation between the small bearing seat and the large bearing seat are achieved.

In this embodiment, one side of the small bearing seat 1011 is attached to the open side of the large bearing seat 1010 correspondingly for sealing, and the positioning column 1016 is disposed at the sealing attachment position between the small bearing seat 1011 and the large bearing seat 1010.

In this embodiment, fastening bolts 1015 may be disposed on the positioning pillars 1016, so that the fastening bolts 1015 pass through the positioning pillars 1016 and then are screwed and fixed with the large bearing seat, thereby forming the screw mounting structure as described in the first embodiment; the specific mode is as follows: the positioning column 1016 is provided with a through hole which is coaxially arranged, the bottom of the positioning groove 1115 is provided with a bolt hole which is coaxially arranged corresponding to the through hole, and the end part of the fastening bolt 1015 passes through the through hole arranged on the positioning column 1016 and then is in threaded engagement with the bolt hole arranged at the bottom of the positioning groove 1115; preferably, the positioning posts 1016 are cylindrical structures extending in a direction parallel to the axis of the washing shaft 9, and the positioning grooves 1115 are cylindrical grooves extending in a direction parallel to the axis of the washing shaft 9; the aperture of the bolt hole formed in the bottom of the positioning groove 1115 is smaller than or equal to the aperture of the through hole formed in the positioning column 1016, the aperture of the through hole formed in the positioning column 1016 is smaller than or equal to the diameter of the cross section of the outer peripheral wall of the positioning column 1016, and the diameter of the cross section of the outer peripheral wall of the positioning column 1016 is smaller than or equal to the diameter of the outer contour of the bottom of the positioning groove 1115. Therefore, the fastening bolt is ensured to penetrate through the positioning column and then is in threaded engagement with the bolt hole arranged in the positioning groove for fixation, and the purpose that the small bearing seat is clamped and installed on the large bearing seat by the fastening bolt is achieved.

In this embodiment, a prying bolt 1114 may be disposed on the positioning pillar 1016, so that the prying bolt 1114 passes through the positioning pillar 1016 and then limitedly abuts against the large bearing seat, so as to pry the small bearing 11 and separate from the large bearing seat 1010, thereby forming the screw pillar structure as described in the second embodiment; the specific mode is as follows: the positioning column 1016 is provided with a screw hole which is coaxially arranged, the bottom of the positioning groove 1115 is hermetically arranged, and the end part of the prying bolt 1114 extends into the screw hole arranged on the positioning column 1016 and then is in limited contact with the bottom of the positioning groove 1115 so as to pry the small bearing seat 1011 to be separated from the large bearing seat 1010.

In this embodiment, a plurality of positioning columns 1016 are arranged on the small bearing seat 1011, and each positioning column 1016 is arranged in different radial directions of the small bearing seat 1011; preferably, the positioning posts 1016 are arranged at equal angular intervals on the outer circumference of the small bearing seat 1011.

Example eight

As shown in fig. 3 to 6, the present embodiment describes a speed reduction clutch for a drum washing machine, which includes a housing 1, a brake wheel 4 is disposed in a mounting cavity 1012 disposed on the housing 1, a wheel train 1008 is disposed inside the brake wheel 4, and a washing shaft 9 engaged with a motor rotor 1021 penetrates through the wheel train 1008 to drive the washing shaft and an inner cylinder shaft 8 to rotate; a clutch meshing sleeve 1003 is further arranged between the shell 1 and the motor rotor 1021, the clutch meshing sleeve 1003 can move along the axial direction of the washing shaft 9 under the action of a clutch driving structure, and the clutch meshing sleeve 4 and the motor rotor 1021 are meshed and rotate, or the clutch meshing sleeve 1003 and a clutch fixing disc 1004 arranged on the shell 1 are meshed and locked.

Through the clutch meshing sleeve and the clutch fixing disc which are mutually independent and are arranged on the shell of the speed reduction clutch, the purposes of independent setting and independent installation respectively can be achieved between different parts of the speed reduction clutch, the part standardization degree of the speed reduction clutch is improved, and the assembly efficiency of the speed reduction clutch is greatly improved.

In this embodiment, the housing 1 includes a large bearing seat 1010, the large bearing seat 1010 is provided with a mounting cavity 1012, the mounting cavity 1012 is disposed along an axial direction and close to an opening of one end of the motor rotor 1021, a small bearing seat 1011 is detachably mounted at the opening, and the clutch fixing plate 1004 is fixedly mounted on one side of the small bearing seat 1011 close to the motor rotor 1021.

In this embodiment, the clutch fixing disc 1004 and the clutch engaging sleeve 1003 are coaxially sleeved on the washing shaft 9, a circle of inner ring engaging teeth 1041 is provided on the inner circumference of the clutch fixing disc 1004, a circle of outer ring engaging teeth 1031 is provided on the outer circumference of one end of the clutch engaging sleeve 1003 close to the housing 1, so that the clutch engaging sleeve 1003 moves to the outer ring engaging teeth 1031 to be engaged with the inner ring engaging teeth 1041 under the action of the clutch driving structure.

In this embodiment, a return spring 1030 is clamped between the clutch fixing plate 1004 and the clutch engaging sleeve 1003, and one side of the clutch engaging sleeve 1003 close to the motor rotor 1021 is in limited contact with the clutch driving structure, so that the clutch engaging sleeve 1003 is movably mounted between the clutch fixing plate 1004 and the motor rotor 1021.

In this embodiment, the clutch fixing disk 1004 is a circular ring-shaped structure, at least one assembling hole is distributed on the circular ring-shaped clutch fixing disk 1004, a bolt hole matched with the assembling hole is arranged on the small bearing seat 1011, and a bolt passes through the assembling hole and then is fastened with the bolt hole in a threaded manner, so that the clutch fixing disk 1004 is fixedly mounted on the small bearing seat 1011 through the bolt; preferably, a plurality of mounting holes are arranged in the annular clutch fixing plate 1004 at equal intervals; more preferably, the mounting holes are provided at equal intervals in the center of the clutch fixing plate 1004, and the diameter of each mounting hole is set to be equal to the diameter of the mounting hole.

In this embodiment, two ends of each tooth top of the inner ring meshing teeth 1041 and the outer ring meshing teeth 1031 are respectively provided with an arc chamfer so as to facilitate the meshing of the clutch fixing plate 1004 and the clutch meshing sleeve 1003.

In this embodiment, a circle of radially protruding clamping ribs 1032 is disposed on the periphery of the clutch engaging sleeve 1003, one side of each clamping rib 1032, which is close to the motor rotor 1021, is in limit contact with a shifting fork 1009 of the clutch driving structure, and the shifting fork 1009 provides a limit acting force to the clutch engaging sleeve 1003 in the direction of the clutch fixing disc 1004 through the clamping rib 1032, so that the clutch engaging sleeve 1003 is movably assembled between the motor rotor 1021 and the clutch fixing disc 1004.

In this embodiment, the wheel train 1008 includes an oil seal cover 13 sleeved on the outer periphery of the washing shaft 9 and penetrating out of the housing from the center of the small bearing seat 1011, a circle of external teeth 811 is arranged on the outer periphery of the penetrating end of the oil seal cover 13, a circle of internal teeth 1033 is arranged on the inner periphery of the clutch meshing sleeve 1003, and the internal teeth 1033 and the external teeth 811 are correspondingly meshed and connected to each other, so that the clutch meshing sleeve 1003 and the oil seal cover 13 are meshed and fixed with each other.

In this embodiment, the extension distance of the external teeth 811 arranged on the oil seal cover 13 in the axial direction of the washing shaft 9 covers the moving position of the internal teeth 1033 in the moving process of the clutch engaging sleeve 1003, so that when the clutch engaging sleeve 1003 moves along the axial direction of the washing shaft 9 under the action of the clutch driving device, the internal and external teeth 31 and 811 are always engaged and connected; preferably, one end of the clutch engaging sleeve 1003 close to the motor rotor 1021 is provided with a plurality of engaging teeth 1034 protruding radially outwards, and the motor rotor 1021 is provided with engaging grooves 1022 matched and fixed with the engaging teeth 1034.

Example nine

As shown in fig. 3 to 6, the present embodiment describes a speed reduction clutch for a drum washing machine, which includes a clutch sleeve 1003, wherein the clutch sleeve 1003 can move along the axial direction of a washing shaft 9 under the action of a clutch driving structure, so that the clutch sleeve 1003 is engaged with or disengaged from a motor rotor 1021; the clutch meshing sleeve 1003 is provided with meshing teeth 1034 meshed with the motor rotor 1021, and elastic pads 1035 are sleeved outside the meshing teeth 1034, so that the meshing teeth 1034 are meshed and contacted with the motor rotor 1021 through the elastic pads 1035.

The elastic cushion is arranged between the motor rotor and the meshing teeth of the clutch meshing sleeve, so that noise generated when the clutch meshing sleeve is meshed with the motor rotor is eliminated, vibration and noise generated when the speed reduction clutch operates are reduced, and the comfort level of a user during the operation of the whole washing machine is effectively improved.

In this embodiment, one end of the clutch sleeve 1003 is provided with a plurality of engaging teeth 1034 protruding outward in the radial direction, and one side of each engaging tooth 1034 away from the center of the clutch sleeve 1003 is wrapped with an elastic pad 1035.

In this embodiment, the elastic pad 1035 includes a circular ring 1036 disposed along an end surface of the clutch engaging sleeve, the circular ring 1036 has a plurality of coating portions 36 protruding outward in a radial direction, and the coating portions 36 are correspondingly fastened to the engaging teeth 1034.

In this embodiment, a plurality of radially extending engagement ribs 1023 protruding toward the clutch sleeve 1003 are disposed on one side of the motor rotor 1021 near the clutch sleeve 1003, and a gap between adjacent engagement ribs 1023 forms an engagement groove 1022 corresponding to the engagement teeth 1034 disposed on the clutch sleeve 1003.

In this embodiment, the side surface of the outer peripheral contour of the tooth 1034 is covered by the elastic pad 1035, so that the side surface of the outer peripheral contour of the tooth 1034 is engaged with the inner wall surface of the side of the engaging groove 1022 through the elastic pad 1035, thereby reducing the noise in the rotation process of the motor-driven clutch sleeve.

Example ten

As shown in fig. 3 to fig. 7, the present embodiment describes a speed reduction clutch for a drum washing machine, which includes a housing 1, a clutch sleeve 1003 is installed outside the housing 1, the clutch sleeve 1003 can move along the axial direction of a washing shaft 9 under the action of a clutch driving structure, so that the clutch sleeve 1003 is engaged with or disengaged from a motor rotor 1021; the reduction clutch is also provided with a position sensor 42 for detecting the position of the clutch sleeve 1003.

Through set up position sensor on the speed reduction clutch to the realization is to the accurate detection of separation and reunion meshing cover position, and then reaches the timely control to speed reduction clutch operation trouble, has effectively promoted speed reduction clutch's operation stationarity and reliability.

In this embodiment, the clutch driving structure includes a shifting fork 1009, the middle part of the shifting fork 1009 is rotatably mounted on the housing 1, a first end of the shifting fork 1009 is in limit contact with the clutch engaging sleeve 1003, and a second end of the shifting fork 1009 is connected with the driving unit, so as to drive the shifting fork 1009 to rotate under the action of the driving unit, and further drive the clutch engaging sleeve 1003 to move along the axial direction of the washing shaft 9; the position sensor 42 detects the relative position between the shift fork 1009 and the housing 1 to obtain the position of the clutch sleeve 1003. In this embodiment, the driving unit can be set as a stepping motor, and the output end of the stepping motor is connected with the end of the shifting fork through the pulling rope.

In this embodiment, a circle of radially protruding clamping ribs 1032 is arranged on the periphery of the clutch engaging sleeve 1003, one side of the clamping rib 1032, which is close to the motor rotor, is in limit contact with a first end of the shifting fork 1009, and the shifting fork 1009 provides a limit acting force to the clutch engaging sleeve 1003 in a direction close to the housing 1 through the clamping ribs 1032, so that the clutch engaging sleeve 1003 is movably assembled between the motor rotor 1021 and the clutch fixing disc 1004; preferably, a return spring 1030 is further arranged between the clamping rib 1032 of the clutch engaging sleeve 1003 and the housing 1, and the return spring 1030 provides elastic force for the clutch engaging sleeve 1003 in a direction away from the housing 1, so that the clutch engaging sleeve 1003 is assembled on the speed reduction clutch under the action of the return spring 1030 and the shifting fork 1009.

In this embodiment, a first end of the shifting fork 1009 is provided with a section of arc-shaped connecting rib 91 extending around the periphery of the clamping rib 1032 of the clutch engaging sleeve 1003, two ends of the connecting rib 91 are respectively provided with a limiting rib 92 extending along the radial direction of the clutch engaging sleeve 1003, and the limiting ribs 92 are respectively in limited contact with one side of the clamping rib 1032 close to the motor rotor 1021; the position sensor 42 is arranged on the shell 1 corresponding to the limiting rib 92 to detect the distance between the limiting rib 92 and the shell 1; preferably, the center of the connecting rib 91 and the rotating shaft of the shifting fork 1009 are on the same vertical plane, so that the limiting ribs 92 at the two ends of the connecting rib 91 are always at the same horizontal height.

In this embodiment, the housing 1 includes a large bearing seat 1010, the large bearing seat 1010 is provided with a mounting cavity 1012, the mounting cavity 1012 is provided with an opening at one end close to the motor rotor 1021 along the axial direction, a small bearing seat 1011 is detachably mounted at the opening, and a clutch fixing disc 1004 is mounted at one side of the small bearing seat 1011 close to the motor rotor 1021; the middle part of the shifting fork 1009 is arranged on the clutch fixing disc 1004 in a pivoting way; the position sensor 42 is provided on the clutch fixing plate 1004 corresponding to the limit rib 92 to detect a relative distance between the limit rib 92 and the clutch fixing plate 1004.

In this embodiment, the position sensor 42 and the limiting rib 92 are correspondingly overlapped in the direction parallel to the axis of the washing shaft 9; preferably, the limiting rib 92 has a certain extending width in the circumferential direction of the clutch engaging sleeve 1003, so that the position sensor 42 is always coincident with at least part of the limiting rib 92 in the direction parallel to the axis of the washing shaft 9 during the movement of the shift fork 1009.

In this embodiment, the position sensor 42 is mounted on the shift fork 1009 to detect a relative distance between the shift fork 1009 and the housing 1; preferably, the position sensor 42 is arranged at the contact position of the shifting fork 1009 and the clutch engaging sleeve 1003.

It should be noted that, in the above embodiments, the partially same structures are described by using different names due to different explanatory angles, and the difference in names does not constitute a limitation on the product structure, and as long as the functions are consistent with the parts in the corresponding drawings, the same structure is still provided, and the above embodiments may form different embodiments with each other.

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 (9)

1. A decelerating clutch for a washing machine comprises a shell, a brake wheel and an inner cylinder shaft connected with the brake wheel or a wheel train inside the brake wheel, and is characterized in that a first bearing is arranged between the brake wheel and the shell, and a second bearing is arranged between the inner cylinder shaft and the shell;

the shell comprises a bearing seat, one end of the brake wheel, which is close to the inner cylinder, is narrowed and provided with a sleeve part, the sleeve part extends into the bearing seat, the bearing seat comprises a first bearing seat and a second bearing seat, the first bearing is arranged between the first bearing seat and the sleeve part, and the second bearing is arranged between the second bearing seat and the inner cylinder;

the first bearing seat is communicated with the second bearing seat, and a first limiting structure for limiting the installation position of the first bearing is arranged on the first bearing seat and/or the sleeve part;

the first limiting structure comprises a second step surface formed by inward projection of the inner wall of one end, far away from the inner cylinder, of the first bearing seat, and further comprises a third step surface formed by outward radial projection of one end, far away from the inner cylinder, of the sleeve part, the end surface of the side part of the outer ring of the first bearing abuts against the second step surface, and the end surface of the side part of the inner ring of the first bearing abuts against the third step surface.

2. The decelerating clutch for the washing machine as claimed in claim 1, wherein one end of the brake wheel near the inner cylinder is inserted into a bearing seat, the inner cylinder shaft is mounted on the brake wheel through the bearing seat, a first bearing is mounted between the part of the brake wheel in the bearing seat and the bearing seat, and a second bearing is mounted between the inner cylinder shaft and the bearing seat.

3. The speed reduction clutch for a washing machine as claimed in any one of claims 1 to 2, wherein the first bearing housing and the second bearing housing have different inner diameters for mounting the first bearing and the second bearing having different sizes, respectively.

4. The decelerating clutch for a washing machine as claimed in claim 3, wherein an inner diameter of the first bearing seat is smaller than an inner diameter of the second bearing seat, a first step surface for connection transition is formed at a communication position of the first bearing seat and the second bearing seat, and a side end surface of the second bearing abuts against the first step surface.

5. The decelerating clutch for the washing machine as claimed in claim 1, wherein a second limiting structure for limiting an installation position of the second bearing is provided on the second bearing housing or at a communication position between the second bearing and the first bearing.

6. The decelerating clutch for a washing machine according to claim 5, wherein a first step surface for connection transition is formed at a communication portion between the first bearing housing and the second bearing housing, an end surface of the sleeve portion and/or the first step surface constitutes the second limit structure, a side end surface of the outer ring of the second bearing abuts against the first step surface, and a side end surface of the inner ring of the second bearing abuts against an end surface of the sleeve portion.

7. The decelerating clutch for a washing machine as claimed in claim 1, wherein the first bearing comprises at least one rolling bearing/composite bearing, and the second bearing comprises at least one rolling bearing/composite bearing.

8. The decelerating clutch for a washing machine as claimed in claim 7, wherein end surfaces of two adjacent bearings between the first bearing and the second bearing are in direct contact or have a certain gap.

9. A method of assembling a reduction clutch according to any one of claims 1 to 8, comprising the steps of:

s1, pressing a first bearing into a bearing seat arranged on a shell;

s2, pressing one end of a brake wheel into the bearing seat to be matched with the inner ring of the first bearing;

s3, pressing the second shaft into a bearing seat arranged on the shell;

and S4, the inner cylinder shaft penetrates through the bearing seat to be installed on the brake wheel, and the inner cylinder shaft limits the positions of the first bearing and the second bearing and prevents the first bearing and the second bearing from being separated from the bearing seat.

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