Laundry treating apparatus

Abstract

The utility model provides clothes treating equipment. The clothes treating equipment comprises an outer barrel, an inner barrel, a transmission shaft and a bearing assembly; the inner cylinder is arranged in the outer cylinder; the transmission shaft is provided with a first end and a second end which are opposite to each other, the first end is connected with the inner cylinder so as to drive the inner cylinder to rotate, a first step part is integrally formed on the transmission shaft, and the first step part protrudes in the radial direction of the transmission shaft; the bearing assembly comprises a first bearing installed on the outer cylinder, the transmission shaft is sleeved with the first bearing, the first bearing is located on one side, in the axial direction, of the first step part, and the first bearing is axially positioned through the first step part. The clothes processing equipment can solve the problem that the transmission shaft is prone to axial jumping.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a clothing processing device. Background Art

[0002] The drive shaft is one of the most important components of a laundry machine. One end of the drive shaft is connected to the inner drum, and the other end is connected to the motor. When the motor is running, the drive shaft transmits the driving force to drive the inner drum to rotate.

[0003] When the inner drum rotates, the transmission shaft is prone to axial runout, which may cause the clothing processing device to be prone to noise and the risk of bearing damage. Utility Model Content

[0004] The utility model provides a clothes processing device to solve the technical problem that the transmission shaft is prone to axial runout.

[0005] To achieve the above objectives, the clothing processing device proposed in this application includes:

[0006] outer cylinder;

[0007] An inner cylinder, disposed inside the outer cylinder;

[0008] a transmission shaft having a first end and a second end opposite to each other, the first end being connected to the inner cylinder to drive the inner cylinder to rotate, the transmission shaft being integrally formed with a first step portion protruding in a radial direction of the transmission shaft; and

[0009] The bearing assembly includes a first bearing mounted on the outer cylinder. The first bearing is sleeved on the transmission shaft and located on one side of the first step portion in the axial direction. The first step portion is used to axially position the first bearing.

[0010] Optionally, in one embodiment, the first step portion is configured as an annular protrusion formed along the circumference of the transmission shaft.

[0011] Optionally, in one embodiment, the Rockwell hardness of the first step portion is greater than or equal to HRC40.

[0012] Optionally, in one embodiment, the bearing assembly further comprises a bearing seat mounted on the outer cylinder and a shaft seal covering one end of the bearing seat, wherein the first bearing is disposed in an installation space defined by the bearing seat and the shaft seal;

[0013] The shaft seal sleeve is arranged on the first step portion, and the inner peripheral wall of the shaft seal is sealed and matched with the outer peripheral wall of the first step portion.

[0014] Optionally, in one embodiment, the surface roughness Ra of the outer peripheral wall of the first step portion is less than or equal to 1.6 μm.

[0015] Optionally, in one embodiment, a support member is further included, and the support member abuts against the first bearing and the first step portion on two opposite sides in the axial direction.

[0016] Optionally, in one embodiment, the support member is a rubber ring, and the rubber ring is sleeved on the transmission shaft.

[0017] Optionally, in one embodiment, a protrusion is provided on the first end along the radial direction of the transmission shaft;

[0018] The inner cylinder is formed with a mounting groove, a groove wall of the mounting groove is provided with a pit, the first end is inserted into the mounting groove, and the protrusion is matched with the pit in a concave-convex manner.

[0019] Optionally, in one embodiment, the protrusion is provided in plurality, and the plurality of protrusions are arranged along the circumference of the transmission shaft;

[0020] There are a plurality of the pits, and the plurality of the pits correspond one-to-one to the plurality of the protrusions.

[0021] Optionally, in one embodiment, the bearing assembly further comprises a second bearing mounted on the outer cylinder, wherein the second bearing is sleeved on the outer end of the transmission shaft and is located on a side of the first bearing close to the second end;

[0022] A second step portion is also protruded from the transmission shaft. The second step portion is located between the first bearing and the second bearing and abuts against the second bearing.

[0023] In the clothing processing device provided in the present application, a first step portion abutting against the first bearing is provided on the transmission shaft, which can limit the axial runout of the transmission shaft, thereby improving noise and reducing the risk of bearing damage; at the same time, the first step portion is integrally formed with the transmission shaft, with a simple structure and easy manufacturing, avoiding the additional manufacture of adaptive bushing parts, which helps to streamline parts and simplify assembly steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1This is a schematic cross-sectional view of an embodiment of a clothes processing device of the present application;

[0026] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0027] Figure 3 for Figure 1 Schematic diagram of the structure of the transmission shaft;

[0028] Description of Figure Numbers:

[0029] Label name Label name 100 Clothing processing equipment 4 transmission shaft 1 outer cylinder 41 First step 2 Inner tube 42 Second step 21 tripod 43 bulge 31 bearing seat 5 Shaft seal 32 First bearing 6 Support 33 Second bearing

[0030] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0032] The present embodiment provides a laundry processing device 100, comprising an outer drum 1, an inner drum 2, a drive shaft 4, and a bearing assembly. The laundry processing device 100 can be a washing machine, a dryer, or a washer-dryer-in-one. The laundry processing device 100 provided in the present embodiment can address the problem of axial runout of the drive shaft 4. This will be described below with reference to the accompanying drawings.

[0033] In the embodiments of this application, Figure 1 and Figure 2 As shown, the laundry processing device 100 includes an outer drum 1, an inner drum 2, a transmission shaft 4, and a bearing assembly. The inner drum 2 is disposed within the outer drum 1; the transmission shaft 4 has a first end and a second end opposite each other, the first end being connected to the inner drum 2 to drive the inner drum 2 to rotate. The transmission shaft 4 is integrally formed with a first step 41, which protrudes radially from the transmission shaft 4. The bearing assembly includes a first bearing 32 mounted on the outer drum 1. The first bearing 32 is sleeved on the transmission shaft 4 and is located axially on one side of the first step 41. The first step 41 axially positions the first bearing 32.

[0034] In the clothing processing device 100 provided in the present application, a first step portion 41 is provided on the transmission shaft 4 to abut against the first bearing 32, which can limit the axial runout of the transmission shaft 4, thereby improving noise and reducing the risk of bearing damage; at the same time, the first step portion 41 is integrally formed with the transmission shaft 4, with a simple structure and easy manufacturing, avoiding the additional manufacture of adaptive bushing parts, which helps to streamline parts and simplify assembly steps.

[0035] Specifically, the outer drum 1 is used to hold water, and the inner drum 2 is rotatably mounted within the outer drum 1, which is used to hold clothes. A drive shaft 4 passes through the outer drum 1. One end of the drive shaft 4 is connected to a motor (not shown), and the other end is a transmission end, which is used to transmit the driving force output by the motor to the inner drum 2. When the drive shaft 4 is driven by the motor and rotates around the axis of the drive shaft 4, it can also drive the inner drum 2 to rotate around the axis of the drive shaft 4. The drive shaft 4 itself is rotationally connected to the outer drum 1.

[0036] For ease of description, this article uses a drum-type clothing processing device as an example to illustrate the solution. In this article, the side of the clothing processing device 100 facing the user is defined as the front side, and the side facing away from the user is defined as the rear side. Back to the solution of this application, the drive shaft 4 extends in the front-to-back direction, that is, the axial direction of the drive shaft 4 is the front-to-back direction. The drive shaft 4 has a first end (i.e., the front end) and a second end (i.e., the rear end) that are relatively arranged, wherein the first end is used to be fixedly connected to the inner drum 2, and the second end is used to be connected to the motor transmission. The radial direction in this article refers to the direction along the radius of a reference object (for example, in the radial direction of the drive shaft 4, the reference object is the drive shaft 4).

[0037] To install the drive shaft 4 and achieve rotational connection between the drive shaft 4 and the outer cylinder 1, the drive shaft 4 must be mounted to the outer cylinder 1 via a bearing assembly. In some embodiments, the bearing assembly includes a first bearing 32, which is mounted on the outer cylinder 1 and through which the drive shaft 4 passes. The first bearing 32 may include a first inner ring and a first outer ring that engage in rolling engagement with each other. The first outer ring is connected to and fixed relative to the outer cylinder 1; the first inner ring is mounted on and fixed relative to the drive shaft 4; rolling elements are disposed between the first outer ring and the first inner ring to achieve rolling engagement between the first outer ring and the first inner ring. To facilitate rolling, a certain gap between the inner and outer rings is inevitably present, resulting in a certain amount of radial displacement of the drive shaft 4, which can easily cause axial runout of the drive shaft 4 during motor operation.

[0038] The first step portion 41 is a raised structure that protrudes from the transmission shaft 4 in the radial direction of the transmission shaft 4, thereby forming a step between the first step portion 41 and the outer peripheral wall of the transmission shaft 4. The first step portion 41 is located on the axial side of the first bearing 32 of the transmission shaft 4, and is particularly located in front of the first bearing 32. In this way, when the transmission shaft 4 moves axially, the first step portion 41 can limit the transmission shaft 4 and restrict its forward axial movement. At the same time, the first step portion 41 abuts against the first bearing 32. The force between the first step portion 41 and the first bearing 32 can subject the first bearing 32 to radial constraints and stronger axial constraints, thereby better limiting the first bearing 32 and preventing it from bouncing, which is more conducive to improving noise and protecting the bearing. The first step portion 41 can abut against the first inner ring to avoid affecting the operation of the first bearing 32.

[0039] The first step portion 41 can be configured as an annular convex portion formed along the circumference of the transmission shaft 4 . This not only makes it easy to manufacture but also has better structural strength.

[0040] In order to achieve the axial positioning of the first bearing 32, there are many ways to implement it. For example, the first bearing 32 and the first step 41 can directly contact and abut each other, so that the first step 41 can play an axial positioning role for the first bearing 32; other components can also be provided between the first step 41 and the first bearing 32 to ensure that the first step 41 abuts against other components and the first bearing 32 abuts against other components. Figure 2 As shown, in some embodiments, the laundry processing device 100 further includes a support member 6, which is located between the first bearing 32 and the first step portion 41, and the support member 6 abuts the first bearing 32 and the first step portion 41 on opposite sides in the axial direction. Due to manufacturing tolerances, the abutment effect between the first step portion 41 and the first bearing 32 may be slightly weak. To this end, the support member 6 is filled in the gap between the first bearing 32 and the first step portion 41, with one side of the support member 6 abutting the first bearing 32 and the other side abutting the first step portion 41, thereby better limiting the axial movement of the first bearing 32. Furthermore, in some embodiments, the support member 6 is interference fit with the gap, which can subject the first bearing 32 to radial constraint force and stronger axial constraint force, thereby better fixing the bearing.

[0041] Specifically, the support member 6 can be a rubber ring, which can be sleeved on the transmission shaft 4 for easy installation. At the same time, it has a certain elasticity, can better abut between the first bearing 32 and the first step portion 41, and play a buffering role to prevent stress cracking.

[0042] In some embodiments, the bearing assembly further includes a bearing seat 31 and a shaft seal 5. The bearing seat 31 is fixedly mounted on the outer cylinder 1 and sleeved around the outside of the drive shaft 4. The bearing seat 31 defines a cavity with front and rear openings. The drive shaft 4 extends through the cavity, with the first and second ends of the drive shaft 4 extending from the cavity's two openings. The shaft seal 5 is annular and can be sleeved around the outside of the drive shaft 4. The seal is positioned over the first end opening of the bearing seat 31, thereby defining an installation space together with the bearing seat 31. The first bearing 32 is mounted within the installation space, with its first outer ring fixedly mounted on the bearing seat 31. The shaft seal 5, also known as an oil seal, seals the installation space and prevents water from entering the bearing seat 31. The shaft seal 5 sleeves onto the first step 41, with the inner circumferential wall of the seal 5 slidingly engaging the outer circumferential wall of the first step 41 and sealing against each other. This ensures both sealing and rotation of the drive shaft 4.

[0043] In some embodiments, the outer peripheral wall of the first step portion 41 is configured to have a smooth surface, thereby better cooperating with the shaft seal 5, ensuring sealing and preventing water leakage. Furthermore, the surface roughness Ra of the outer peripheral wall of the first step portion 41 can be configured to be less than or equal to 1.6 μm; for example, it can be 1.6-1.4 μm, 1.6-1.2 μm, 1.6-1.0 μm, 1.6-0.8 μm, 1.2-1.0 μm, 1.0-0.8 μm, or less than 0.8 μm, etc.

[0044] In some embodiments, the Rockwell hardness of the first step 41 is greater than or equal to HRC40. During actual processing, the hardness of the first step 41 can be enhanced through high-frequency quenching to provide greater support strength. It is understood that the first step 41 is integrally formed with the transmission shaft 4, and the area on the transmission shaft 4 corresponding to the first step 41 is set as the first section. The entire structure formed by the first step 41 and the first section can be designed to have a higher hardness. For example, the Rockwell hardness of the entire structure formed by the first step 41 and the first section is greater than or equal to HRC40, thereby improving the overall strength of this area and better cooperating with the shaft seal 5.

[0045] In some embodiments, the transmission shaft 4 further includes a second section that cooperates with the first bearing 32. The Rockwell hardness of the second section can also be set to be greater than or equal to HRC40, so that the second section has greater strength and can better cooperate with the first bearing 32. During actual processing, the hardness of the second section can be enhanced through high-frequency quenching to provide greater support strength.

[0046] In some embodiments, the bearing assembly further includes a second bearing 33 mounted on the outer cylinder 1. The second bearing 33 is sleeved onto the outer end of the transmission shaft 4 and located on the side of the first bearing 32 closer to the second end. Specifically, the second bearing 33 is installed within the mounting space and located behind the first bearing 32. The second bearing 33 includes a second outer ring and a second inner ring. The second outer ring is fixedly connected to the bearing seat 31, and the second inner ring is mounted on the transmission shaft 4 and fixed relative to the transmission shaft 4. Rolling elements are disposed between the second outer ring and the second inner ring to achieve a rolling fit between the second outer ring and the second inner ring.

[0047] The transmission shaft 4 further includes a third section that cooperates with the second bearing 33. The Rockwell hardness of the third section can also be set to be greater than or equal to HRC40 to provide greater strength for the third section and better cooperate with the second bearing 33. During actual processing, the hardness of the third section can be enhanced by high-frequency quenching to provide greater support strength.

[0048] See also Figure 3 In some embodiments, the transmission shaft 4 further includes a second step 42 protruding from the transmission shaft 4. The second step 42 is located between the first bearing 32 and the second bearing 33. The second step 42 abuts the second bearing 33, constraining the transmission shaft 4 in both radial and axial directions. The restraining action of the first step 41 and the second step 42 further limits the runout of the transmission shaft 4. The second step 42 can be integrally formed with the transmission shaft 4.

[0049] In some embodiments, the second step portion 42 can be configured as a plurality of convex portions spaced apart along the circumference of the transmission shaft 4, which helps to reduce the material consumption; or it can be configured as an annular structure surrounding the circumference of the transmission shaft 4, which is not only easy to manufacture but also has better structural strength. Figure 3 As shown, the first section, the second section, and the third section are arranged in sequence from front to back, the first step portion 41 is formed in the first section, and the second step portion 42 is formed in the second section. The outer diameter of the first step portion 41 is greater than the outer diameter of the second step portion 42, and the outer diameter of the second step portion 42 is greater than the outer diameter of the third section.

[0050] In some embodiments, the inner cylinder 2 is formed with a mounting groove, into which the first end of the transmission shaft 4 is inserted and fixedly connected to the groove wall of the mounting groove, thereby achieving a fixed connection between the transmission shaft 4 and the inner cylinder 2. Furthermore, a protrusion 43 can be provided on the first end of the transmission shaft 4, projecting radially from the transmission shaft 4. The groove wall of the mounting groove is provided with a recess, with the protrusion 43 mating with the recess. When the first end is inserted into the mounting groove, the protrusion 43 and the recess cooperate in a concave-convex manner, thereby increasing the contact area between the transmission shaft 4 and the inner cylinder 2 and ensuring overall strength. In one embodiment, the inner cylinder 2 includes a tripod 21, and a mounting groove is provided on the tripod 21. During actual processing, the first end of the processed transmission shaft 4 can be inserted into a mold of the tripod 21. When the tripod 21 is injection molded or cast, the mounting groove and the pit can be formed, and a fixed connection between the tripod 21 and the first end can be achieved. The provision of the protrusion 43 also increases the contact surface between the first end and the liquid material, which helps to enhance the connection strength between the two.

[0051] The shape of the protrusion 43 can be cylindrical, truncated cone, pointed cone, spherical, irregular, etc., which is not limited in the present application. In some embodiments, the protrusion 43 is sawtooth-shaped.

[0052] Furthermore, multiple protrusions 43 can be provided, arranged along the circumference of the transmission shaft 4; correspondingly, multiple recesses can be provided, with each recess corresponding to each of the protrusions 43. This further increases the contact area and enhances the connection strength. Furthermore, evenly distributing the multiple protrusions 43 along the circumference can improve the connection strength uniformly.

[0053] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features.

[0054] The above is a detailed introduction to the technical solutions provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A clothes processing device, characterized in that: include: outer cylinder; An inner cylinder, disposed inside the outer cylinder; a transmission shaft having a first end and a second end opposite to each other, the first end being connected to the inner cylinder to drive the inner cylinder to rotate, and a first step being integrally formed on the transmission shaft, the first step protruding in a radial direction of the transmission shaft; as well as, The bearing assembly includes a first bearing mounted on the outer cylinder. The first bearing is sleeved on the transmission shaft and located on one side of the first step portion in the axial direction. The first step portion is used to axially position the first bearing.

2. The clothes processing device according to claim 1, characterized in that The first step portion is configured as an annular convex portion formed along the circumference of the transmission shaft.

3. The clothes processing device according to claim 1, characterized in that The Rockwell hardness of the first step portion is greater than or equal to HRC40.

4. The clothes processing device according to claim 1, characterized in that: The bearing assembly further includes a bearing seat mounted on the outer cylinder and a shaft seal covering one end of the bearing seat, wherein the first bearing is disposed in an installation space defined by the bearing seat and the shaft seal; The shaft seal sleeve is arranged on the first step portion, and the inner peripheral wall of the shaft seal is sealed and matched with the outer peripheral wall of the first step portion.

5. The clothes processing device according to claim 1 or 4, characterized in that: The surface roughness Ra of the outer peripheral wall of the first step portion is less than or equal to 1.6 μm.

6. The clothes processing device according to claim 1, characterized in that A support member is further included, wherein the support member abuts against the first bearing and the first step portion at two opposite sides in the axial direction.

7. The clothes processing device according to claim 6, characterized in that: The supporting member is a rubber ring, and the rubber ring is sleeved on the transmission shaft.

8. The clothes processing device according to claim 1, characterized in that: A protrusion is provided on the first end along the radial direction of the transmission shaft; The inner cylinder is formed with a mounting groove, a groove wall of the mounting groove is provided with a pit, the first end is inserted into the mounting groove, and the protrusion is matched with the pit in a concave-convex manner.

9. The clothes processing device according to claim 8, characterized in that: There are multiple protrusions, and the multiple protrusions are arranged along the circumference of the transmission shaft; There are a plurality of the pits, and the plurality of the pits correspond one-to-one to the plurality of the protrusions.

10. The clothes processing device according to claim 1, characterized in that: The bearing assembly further includes a second bearing mounted on the outer cylinder, the second bearing being sleeved on the outer end of the transmission shaft and located on a side of the first bearing close to the second end; A second step portion is also protruded from the transmission shaft. The second step portion is located between the first bearing and the second bearing and abuts against the second bearing.

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