CN107131223B

CN107131223B - Clutch gear ring, clutch and washing machine

Info

Publication number: CN107131223B
Application number: CN201710398826.1A
Authority: CN
Inventors: 胡义明; 闫甜甜; 吴迪; 陈金涛
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd; Midea Welling Motor Technology Shanghai Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd; Midea Welling Motor Technology Shanghai Co Ltd
Priority date: 2017-05-31
Filing date: 2017-05-31
Publication date: 2023-03-07
Anticipated expiration: 2037-05-31
Also published as: CN107131223A

Abstract

The invention discloses a clutch gear ring, a clutch and a washing machine, wherein the clutch gear ring (20) comprises a gear ring body (1), a plurality of clutch teeth (7) which are distributed at equal intervals along the circumferential direction are formed on the axial end of the gear ring body, a clutch tooth socket (8) is formed between every two adjacent clutch teeth, each clutch tooth comprises a plurality of step teeth with gradually increasing tooth heights, and a groove bottom surface (801) of each clutch tooth socket and the respective tooth top surfaces of the step teeth form a continuously ascending horizontal step surface. In the clutch gear ring, the clutch teeth are arranged into a plurality of step teeth with the tooth heights sequentially increasing, so that the clutch gear ring is conveniently meshed with the upper fluted disc or the lower fluted disc in the process of meshing the clutch gear ring with the upper fluted disc or the lower fluted disc, and the smooth conversion of the elution working conditions of the washing machine is realized.

Description

Clutch gear ring, clutch and washing machine

Technical Field

The invention belongs to the field of household appliances, and particularly relates to a clutch gear ring, a clutch and a washing machine.

Background

Along with the improvement of living standard of people, the washing machine is a common household appliance, and brings great convenience to the life of people. Among them, the conversion device between the washing condition and the dehydration condition of the washing machine mostly adopts a tooth-mesh type clutch, especially in the large capacity washing machine.

At present, a gear-mesh clutch generally includes a clutch ring, an upper gear plate, a lower gear plate, and a clutch mechanism, wherein the clutch mechanism is used to drive the clutch ring to slide up and down, so that the clutch ring is respectively meshed with the upper gear plate and the lower gear plate to realize the washing function conversion of the washing machine.

Wherein, the axial both ends of separation and reunion ring gear are formed with separation and reunion tooth and separation and reunion tooth's socket, and radial projection between them all is the rectangle form, and goes up the tooth dish and all be formed with the tooth and the groove of rectangle form with lower fluted disc correspondingly. In the process of meshing the clutch gear ring with the upper fluted disc or the lower fluted disc, the clutch gear ring and the lower fluted disc can be meshed smoothly only when the rectangular clutch teeth on the clutch gear ring completely correspond to the rectangular grooves in the upper fluted disc or the lower fluted disc. Therefore, the clutch gear ring is not convenient to be meshed with the upper fluted disc or the lower fluted disc so as to realize smooth conversion of the washing working condition of the washing machine.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the clutch gear ring, the clutch and the washing machine, which are convenient for the clutch gear ring to be meshed with the upper fluted disc or the lower fluted disc, so that the smooth conversion of the washing working condition of the washing machine is realized.

In order to achieve the above object, the present invention provides a clutch ring gear, including a ring gear body, wherein a plurality of clutch teeth are formed at equal intervals along a circumferential direction on an axial end of the ring gear body, a clutch tooth socket is formed between two adjacent clutch teeth, the clutch teeth include a plurality of step teeth with sequentially increasing tooth heights, and a groove bottom surface of the clutch tooth socket and respective tooth top surfaces of the step teeth form a continuously ascending horizontal step surface.

Preferably, a plurality of the step teeth constituting the clutch teeth are sequentially attached along the circumferential direction, and a vertical step surface is formed between the top surfaces of the adjacent step teeth.

Preferably, the clutch teeth and each of the step teeth are formed as sector-shaped teeth, and the clutch tooth grooves are sector-shaped grooves.

Preferably, the clutch teeth at least comprise a first step tooth and a second step tooth, and the height positions of the first tooth top surface of the first step tooth, the second tooth top surface of the second step tooth and the groove bottom surface of the clutch tooth groove are sequentially decreased progressively.

Preferably, in the circumferential direction, the minimum circumferential width of the first step tooth is not less than 1mm and not more than 2mm, the tooth height is not less than 1.5mm and not more than 2.5mm, the minimum circumferential width of the second step tooth is not less than 5mm and not more than 5mm, and the tooth height is not less than 1.5mm and not more than 3.5mm.

Preferably, the sector angle of the first step tooth is the same as the sector angle of the groove bottom surface and is half of the sector angle of the second step tooth.

Preferably, the sector angle of the first step tooth and the sector angle of the groove bottom surface are both 2.5 degrees, and 36 clutch teeth are distributed at equal intervals in the circumferential direction of the axial end of the gear ring body.

Preferably, an upper shoulder is formed at the axial top end of the gear ring body, a lower shoulder is formed at the axial bottom end of the gear ring body, the clutch teeth are formed on the respective axial end surfaces of the upper shoulder and the lower shoulder, and the outer diameters of the upper shoulder, the lower shoulder and the gear ring body are sequentially decreased progressively.

The invention also provides a clutch, which comprises an upper fluted disc, a lower fluted disc and a clutch gear ring, wherein the clutch gear ring can move up and down to respectively engage with the upper fluted disc or the lower fluted disc, and the clutch teeth are formed on the engaging surface of the upper fluted disc and the engaging surface of the lower fluted disc.

The third aspect of the present invention also provides a washing machine including a clutch.

Through the technical scheme, in the clutch gear ring, the clutch teeth are arranged to comprise a plurality of step teeth with sequentially increasing tooth heights, the bottom surface of the clutch tooth groove and the respective tooth top surfaces of the step teeth form a continuously ascending horizontal step surface, and the clutch gear ring is meshed with the upper gear plate or the lower gear plate through the clutch teeth and the clutch tooth groove, namely, grooves and teeth matched with the clutch teeth and the clutch tooth groove of the clutch gear ring are correspondingly formed on the upper gear plate or the lower gear plate, and the circumferential width of the top surface of the teeth on the upper gear plate or the lower gear plate is smaller than the circumferential width of the surface opening of the clutch tooth groove in the clutch gear ring.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1A to 1C are schematic structural views of a clutch ring gear in the prior art;

FIG. 2 is a schematic diagram illustrating the engagement between a clutch ring gear and an upper toothed plate or a lower toothed plate in the prior art;

FIG. 3 is a schematic diagram of a prior art clutching process;

fig. 4 is an overall sectional view of a clutch ring gear of the first preferred embodiment of the present invention;

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a partial perspective view of the clutch teeth and clutch tooth slots of FIG. 4;

FIG. 7 is a partial top plan view of the clutch teeth and clutch splines of FIG. 4;

FIG. 8 is a schematic view of the engagement of the clutch ring gear of FIG. 4 with the upper or lower toothed plate;

FIG. 9 is a schematic view of a clutch process of the clutch ring gear of the first preferred embodiment of the present invention;

fig. 10 is an overall sectional view of a clutch ring gear according to a second preferred embodiment of the present invention.

Description of reference numerals:

1. gear ring body 2 spline part

3. Upper shoulder 4 and lower shoulder

6. Weight-reducing groove 7 clutch tooth

8. Clutch tooth groove 9 oil storage ring

10. Fluted disc 20 clutch gear ring

71. First step tooth 72 and second step tooth

301. Upper shoulder bottom surface of upper end surface 303

701. First tooth top 702 and second tooth top

801. Slot bottom 802' slot tooth root width

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like are generally described with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

At present, the conversion device between the washing working condition and the dehydration working condition of the washing machine has two main types, namely a spring holding clutch mode and a tooth meshing clutch mode.

The spring holding clutch mode adopts a ratchet and pawl linkage mechanism to drive a square wire spring to hold tightly and loosen a transmission torque shaft sleeve to realize the conversion of the elution working condition, and generally realizes the functions of braking and forward and reverse rotation stopping of the inner barrel by a brake belt and a one-way bearing. The friction clutch mode cannot be suitable for a large-capacity washing machine, is complex in structure, poor in matching stability and unreliable in clutch work, and has the problems of small transmission torque, unstable braking torque, easy breakage of a clutch spring and the like. The gear engagement clutch mode drives the clutch gear ring 20 to slide up and down through the clutch mechanism to realize the conversion of the elution working condition, the conversion mode overcomes most defects of the spring holding clutch mode, and the gear engagement clutch mode is suitable for a high-capacity high-torque washing machine.

In the prior art, a clutch of the tooth mesh type generally includes a clutch ring 20, an upper toothed disc, a lower toothed disc and a clutch mechanism. The clutch teeth 7 and the clutch tooth grooves 8 are arranged at two axial ends of the clutch gear ring 20, grooves and teeth matched with the clutch teeth 7 and the clutch tooth grooves 8 of the clutch gear ring 20 are correspondingly formed on the upper fluted disc and the lower fluted disc, the clutch gear ring 20 is driven to slide up and down through the clutch mechanism, and the clutch gear ring 20 is further meshed with the upper fluted disc and the lower fluted disc respectively to realize the conversion of the washing machine elution function.

The clutch ring gears 20 on the market today are various in types, but generally have the following features, referring to fig. 1A to 1C, that is, a plurality of clutch teeth 7 and clutch tooth grooves 8 (usually 6 to 24) are equally spaced at both axial ends of the clutch ring gear 20 along the circumferential direction, axial projections of the clutch teeth 7 and the clutch tooth grooves 8 are both fan-shaped, and radial projections of the clutch teeth 7 and the clutch tooth grooves 8 are both rectangular (rectangular or their variants). The radial projection of the clutch teeth 7 and the clutch tooth grooves 8 can be referred to fig. 2.

In the process of engaging and disengaging the clutch ring gear 20 and the fluted disc 10 (i.e., the upper fluted disc or the lower fluted disc), referring to fig. 3, when the engaging and disengaging action starts, the clutch ring gear 20 moves axially towards the fluted disc 10 under the action of the engaging and disengaging mechanism, and meanwhile, the clutch ring gear and the fluted disc rotate relatively; until the clutch gear ring 20 contacts with the fluted disc 10, the axial movement is stopped, and the relative rotation between the clutch gear ring and the fluted disc is still continued; after the clutch gear ring 20 rotates a certain angle relative to the fluted disc 10, the clutch teeth 7 on the clutch gear ring 20 completely correspond to the grooves in the fluted disc 10, the clutch tooth grooves 8 on the clutch gear ring 20 also completely correspond to the teeth in the fluted disc 10, and at the moment, meshing starts; after the clutch ring gear 20 and the fluted disc 10 are engaged, the mutual rotation between the clutch ring gear 20 and the fluted disc 10 is stopped, and the clutch ring gear and the fluted disc are axially moved until the clutch ring gear and the fluted disc are completely engaged, so that the clutch is finished.

In the case of the known tooth-mesh clutches, the design of the clutch ring gear 20 has the following disadvantages:

the to-be-clutched gear ring 20 is in contact with the fluted disc 10, and the relative axial motion between the clutched gear ring 20 and the fluted disc 10 is stopped, so that impact noise is easily caused;

from the contact with the fluted disc 10 to the engagement, the clutch ring 20 and the fluted disc 10 need to rotate relatively for a certain angle, and the engagement can be smoothly started only when the clutch teeth 7 in the clutch ring 20 completely correspond to the grooves in the fluted disc 10, so that the problems of difficult engagement, tooth end abrasion and the like are generated.

After the engagement starts, the relative rotation between the clutch ring gear 20 and the toothed disc 10 stops, which is likely to cause impact noise and tooth damage.

In the existing design, in order to prevent the generation of impact noise during forward and reverse rotation, the clutch teeth 7 (or the clutch tooth grooves 8) on the clutch gear ring 20 and the corresponding grooves (or teeth) on the fluted disc 10 are in small clearance fit, so that the requirement on the machining precision is high, and the clutch gear ring 20 and the fluted disc 10 (namely, an upper fluted disc or a lower fluted disc) are not convenient to mesh.

In order to facilitate the engagement of the clutch ring gear 20 with the toothed disc 10, referring to fig. 2, a chamfer 201 'or a radius 203' is generally provided on the clutch teeth 7/clutch teeth grooves 8 of the clutch ring gear 20, and a chamfer 101 'or a radius 103' is also provided on the teeth/grooves of the toothed disc 10, respectively. However, when the meshing is completed, only the coincident vertical straight portions 202', 102', the lead-in features 101', 201' and the root rounding features (i.e., 103 'and 203' in fig. 2) that actually carry the load over the entire tooth height do not carry the load. Therefore, in order to satisfy the reliable engagement and the reliable positioning, the tooth height of the clutch teeth 7 needs to be made higher, which results in a longer working stroke of the clutch ring gear 20 and further causes a waste in the axial dimension.

In view of the above, in order to facilitate the engagement between the clutch ring gear 20 and the upper or lower toothed disc and reduce the difficulty of the engagement, referring to fig. 4 to 8, the present invention provides a clutch ring gear 20, the clutch ring gear 20 includes a ring gear body 1, a plurality of clutch teeth 7 are formed at equal intervals along the circumferential direction on the axial end of the ring gear body 1, a clutch tooth slot 8 is formed between two adjacent clutch teeth 7, each clutch tooth 7 includes a plurality of step teeth with sequentially increasing tooth heights, and the bottom surface 801 of the clutch tooth slot 8 and the respective top surfaces of the plurality of step teeth form a continuously ascending horizontal step surface. In addition, since the clutch ring gear 20 is meshed with the fluted disc 10 (i.e., the upper fluted disc or the lower fluted disc) through the clutch teeth 7 and the clutch tooth grooves 8, grooves and teeth matched with the clutch teeth 7 and the clutch tooth grooves 8 of the clutch ring gear 20 are correspondingly formed on the upper fluted disc or the lower fluted disc, and the circumferential width of the top surfaces of the teeth on the upper fluted disc or the lower fluted disc is smaller than the circumferential width of the surface openings of the clutch tooth grooves 8 in the clutch ring gear 20. Therefore, in the process of meshing the clutch gear ring 20 with the upper fluted disc or the lower fluted disc, the teeth on the upper fluted disc or the lower fluted disc can easily enter the clutch tooth grooves 8 in the clutch gear ring 20, so that the clutch gear ring 20 is conveniently meshed with the upper fluted disc or the lower fluted disc, and the smooth conversion of the washing working condition of the washing machine is further realized. In the clutch ring gear 20 of the present invention, the clutch ring gear 20 is easily engaged with the upper or lower toothed disc, so that there is no need to provide an engagement introduction feature on the clutch teeth 7/the clutch tooth grooves 8 of the clutch ring gear 20, and the axial height of the clutch ring gear 20 is reduced and the engagement reliability is improved.

Specifically, the multiple stepped teeth included in the clutch teeth 7 may be provided in various forms, the multiple stepped teeth constituting the clutch teeth 7 may sequentially fit along the circumferential direction (refer to fig. 4 and 6), an inter-tooth gap may also be provided between adjacent stepped teeth, and of course, other forms may also be provided, which are not described herein again. In addition, in order to improve the engagement stability of the clutch tooth grooves 8 with the upper or lower toothed disc in the washing or dehydrating mode, referring to fig. 4 and 8, vertical step surfaces are formed between the tooth tops of the adjacent steps.

In addition, referring to fig. 4 to 8, the clutch teeth 7 and each step tooth should be formed as sector-shaped teeth, and the clutch teeth grooves 8 should also be formed as sector-shaped grooves, so that the production process on the clutch ring gear 20 to form the clutch teeth 7 and the clutch teeth grooves 8 can be facilitated. The clutch teeth 7 at least comprise a first step tooth 71 and a second step tooth 72, and the height positions of a first tooth top surface 701 of the first step tooth 71, a second tooth top surface 702 of the second step tooth 72 and a groove bottom surface 801 of the clutch tooth groove 8 are sequentially decreased progressively.

Further, referring to fig. 4 to 8, in the circumferential direction, the minimum circumferential width of the first step tooth 71 should be not less than 1mm and not more than 2mm, the tooth height should be not less than 1.5mm and not more than 2.5mm, the minimum circumferential width of the second step tooth 72 should be not less than 5mm and not more than 5mm, and the tooth height should be not less than 1.5mm and not more than 3.5mm.

Specifically, referring to fig. 6 and 7, the first tooth top surface 701, the second tooth top surface 702, and the groove bottom surface 801 are circularly arranged along the circumferential direction of the clutch ring gear 20, and this structure can uniformly distribute more clutch teeth 7 on the same circumference as compared with the prior art. Preferably, referring to fig. 4 to 8, the fan angle of the first step tooth 71 and the fan angle of the groove bottom surface 801 are the same and are each half of the fan angle of the second step tooth 72. Further, the fan-shaped angle of the first step tooth 71 and the fan-shaped angle of the groove bottom surface 801 are both 2.5 °, and 36 clutch teeth 7 are distributed at equal intervals in the circumferential direction of the axial end of the ring gear body 1, so that 36 clutch teeth 7 can be distributed on the circumference of the clutch ring gear 20. In the prior art, the sector angle of the clutch teeth 7 and the clutch tooth grooves 8 is the same, i.e. in the case of a sector angle of 7.5 ° for the clutch teeth 7, the sector angle of the clutch tooth grooves 8 is also 7.5 °, i.e. only 24 clutch teeth 7 can be distributed over the circumference of the clutch ring 20. Therefore, according to the clutch ring gear 20 of the present embodiment, more clutch teeth 7 can be uniformly distributed in the circumferential direction while ensuring the root thickness (strength) of the clutch teeth 7 to increase the meshing range and reduce the impact noise.

It can be understood that, the larger the fan-shaped angle of the first stepped tooth 71, the second stepped tooth 72 and the groove bottom 801, the smaller the number of the clutch teeth 7 distributed on the clutch ring gear 20, the fewer the meshing position points of the clutch ring gear 20 and the upper fluted disc or the lower fluted disc are, and accordingly, the larger the sliding distance between the two teeth during meshing is, so that the meshing time of the clutch ring gear 20 and the upper fluted disc or the lower fluted disc is increased, and the wear of the two tooth surfaces is also increased. On the contrary, although the fan-shaped angles of the first stepped tooth 71, the second stepped tooth 72 and the groove bottom surface 801 are reduced, the above problem can be effectively alleviated, and the circumferential width of the clutch tooth 7 becomes thin accordingly, so that the tooth root strength is reduced.

In addition, an upper shoulder 3 is formed at the axial top end of the gear ring body 1, a lower shoulder 4 is formed at the axial bottom end of the gear ring body 1, clutch teeth 7 are formed on the axial end surfaces of the upper shoulder 3 and the lower shoulder 4, and the clutch gear ring 20 acts on the bottom surface 303 of the upper shoulder through a clutch mechanism to control the clutch gear ring 20 to move up and down to complete the conversion of the elution working conditions, so that in order to avoid the interference of the clutch mechanism with the lower shoulder 4 or the gear ring body 1 in the conversion process of the elution working conditions, referring to fig. 4 and 5, the outer diameters of the upper shoulder 3, the lower shoulder 4 and the gear ring body 1 are sequentially decreased. Wherein, the clutch mechanism can be a lever-type shifting fork or a spiral shifting ring.

Specifically, referring to fig. 4, an axial through hole is provided in the center of the ring gear body 1, the through hole is provided with a spline portion 2 capable of sliding up and down, and the upper shoulder 3 and the lower shoulder 4 are both a solid of revolution rotatable around the axis of the spline portion 2. In addition, the forward rotation or reverse rotation power of the clutch ring gear 20 is provided by a driving mechanism (e.g., a motor), that is, the driving mechanism drives an output shaft to rotate, and the top shaft part of the output shaft is axially slidably inserted into the spline part 2 of the clutch ring gear 20. In the process of the washing machine elution working condition conversion, the clutch gear ring 20 slides up and down on the top shaft part of the output shaft, in order to obtain enough spline contact length and improve the reliability and stability of the operation of the clutch gear ring and the output shaft under the washing working condition or the dehydration working condition, referring to fig. 4, the height of the top end face of the spline part 2 is increased, namely the top end face of the spline part 2 is higher than the upper end face 301 of the upper shoulder 3.

In addition, in order to improve the material utilization rate, referring to fig. 4 and 5, an annular weight-reduction groove 6 is provided on the top surface of the clutch ring gear 20. Specifically, the weight-reduction grooves 6 may be located between the spline section 2 and the upper end surface 301 of the upper shoulder 3 to divide the clutch teeth 7 setting in the upper shoulder 3 and the spline section 2. Of course, the annular weight-reduction groove 6 can also be used for limiting the installation of the clutch spring.

Further, in order to prevent the grease from splashing when the clutch ring gear 20 rotates at a high speed, referring to fig. 10, an oil reservoir ring 9 is provided on the radially outer end surface of the clutch teeth 7.

Specifically, in order to ensure the gear accuracy of the clutch teeth 7, the spline portion 2, and the like on the clutch ring gear 20 and the stability of the product to improve the product performance, the clutch ring gear 20 should be an integral injection molding. Of course, the improvement of the gear precision is also beneficial to reducing the noise generated when the clutch gear ring 20 drives the upper fluted disc or the lower fluted disc to rotate.

According to another aspect of the present invention, there is also provided a clutch including an upper cog, a lower cog, and a clutch ring gear 20, the clutch ring gear 20 being movable up and down to engage the upper cog or the lower cog, respectively, wherein an engaging surface of the upper cog and an engaging surface of the lower cog are each formed with clutch teeth 7.

Specifically, as shown in fig. 9, when the clutch action starts, the clutch ring gear 20 moves axially toward the fluted disc 10 (i.e., the upper fluted disc or the lower fluted disc) under the action of the clutch mechanism, and there is relative rotation between the two; until the clutch gear ring 20 contacts with the fluted disc 10, the axial movement is stopped, and the relative rotation between the clutch gear ring and the fluted disc is still continued; when the clutch gear ring 20 rotates a certain angle relative to the fluted disc 10, the grooves and the teeth of the clutch gear ring and the fluted disc correspond to each other, and at the moment, meshing begins; after the meshing is carried out, the clutch gear ring 20 and the fluted disc 10 rotate and move axially mutually until the clutch gear ring and the fluted disc are completely meshed, and the clutch is finished.

In the actual clutch process, referring to fig. 8 and 9, since the circumferential width of the first step tooth 701 on the clutch ring gear 20 is much smaller than the groove root width 802' (i.e. the axial width of the surface opening) of the groove on the toothed disc 10, the time consumed from the contact of the toothed disc 10 to the start of the engagement is greatly shortened, and even the situation of tooth root contact is probably not generated in the clutch process, the tooth surface abrasion generated in the clutch process can be effectively reduced, and the engagement noise is also effectively reduced.

According to a third aspect of the present invention, there is also provided a washing machine including a clutch.

Specifically, referring to fig. 4, 8 and 9, when the washing machine sends a washing command, the clutch ring gear 20 moves upward under the driving of the clutch mechanism, so that the clutch ring gear 20 is engaged with the upper fluted disc, at this time, the clutch teeth 7 arranged on the upper shoulder 3 are engaged with the corresponding clutch teeth 7 in the upper fluted disc, and the clutch spring is in a compressed state; when the washing machine sends a dehydration instruction, the clutch gear ring 20 moves downwards under the action of the clutch mechanism (namely moves downwards under the action of the gravity of the clutch gear ring 20 and the reset force of the clutch spring), so that the upper shoulder 3 of the clutch gear ring 20 is completely separated from the upper fluted disc, then the clutch teeth 7 on the lower shoulder 4 are meshed with the corresponding clutch teeth 7 in the lower fluted disc, an inner cylinder in the washing machine is fixedly connected with a wave wheel through a transmission system, and the clutch finishes the working condition conversion from washing to dehydration.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A clutch ring gear, comprising a ring gear body (1), wherein a plurality of clutch teeth (7) are formed at equal intervals along the circumferential direction at the axial end of the ring gear body (1), a clutch tooth socket (8) is formed between two adjacent clutch teeth (7), the clutch teeth (7) comprise a plurality of step teeth with sequentially increasing tooth heights, the groove bottom (801) of the clutch tooth socket (8) and the respective tooth tops of the plurality of step teeth form a continuously ascending horizontal step surface, the clutch teeth (7) and the respective step teeth form fan-shaped teeth, the clutch tooth socket (8) is a fan-shaped groove, the clutch teeth (7) at least comprise a first step tooth (71) and a second step tooth (72), the first tooth top (701) of the first step tooth (71), the second tooth top (702) of the second step tooth (72) and the groove bottom (801) of the clutch tooth socket (8) have sequentially decreasing height positions, the first step tooth (71) and the second step tooth top (801) are all axial teeth with the same fan-shaped angle (36), and the fan-shaped angles (1.5) of the first step tooth bottom (801) and the second step tooth bottom (7) are all distributed with the same axial interval angle;

an oil storage ring (9) is arranged on the radial outer end face of the clutch tooth (7).

2. The ring gear according to claim 1, wherein a plurality of the stepped teeth constituting the clutch teeth (7) are sequentially bonded in the circumferential direction, and a vertical step surface is formed between top surfaces of the adjacent stepped teeth.

3. The clutched ring gear of claim 1, wherein in the circumferential direction, the first stepped tooth (71) has a minimum circumferential width of no less than 1mm and no greater than 2mm, a tooth height of no less than 1.5mm and no greater than 2.5mm, and the second stepped tooth (72) has a minimum circumferential width of no less than 5mm and no greater than 5mm, and a tooth height of no less than 1.5mm and no greater than 3.5mm.

4. The clutched ring gear of any one of claims 1-3, wherein an axial top end of the ring gear body (1) is formed with an upper shoulder (3), an axial bottom end is formed with a lower shoulder (4), respective axial end faces of the upper shoulder (3) and the lower shoulder (4) are each formed with the clutching teeth (7), and outer diameters of the upper shoulder (3), the lower shoulder (4) and the ring gear body (1) decrease in order.

5. Clutch comprising an upper and a lower toothed disc, characterized in that it further comprises a clutch ring according to claim 4, said clutch ring (20) being movable up and down to engage said upper or lower toothed disc, respectively, wherein the engagement surfaces of said upper and lower toothed discs are each formed with said clutch teeth (7).

6. A washing machine, characterized in that it comprises a clutch according to claim 5.