Washing machine

Abstract

The utility model provides a washing machine which comprises an outer roller and an inner roller, the inner roller is rotatably arranged inside the outer roller, a bearing seat is arranged at the bottom of the outer roller, a transmission shaft is arranged on the bearing seat, a first end of the transmission shaft is connected with the inner roller, a support is arranged on the bearing seat, and a second end of the transmission shaft is connected with the inner roller. A motor is arranged on the support, an output shaft of the motor is in transmission connection with the transmission shaft, and the technical problem that in the prior art, due to the fact that the motor is directly arranged on the outer roller, the outer roller is prone to resonance can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of washing machines, and in particular relates to a washing machine. Background Art

[0002] Existing drum washing machines equipped with BLDC motors (brushless direct current motors) often mount the motor on the outer drum, with the excitation generated by the motor acting directly on the outer drum through the bushing. Because the structural stiffness of the outer drum where the motor is mounted is relatively weak, local modes with low fixed frequencies exist. This easily excites local resonance within the motor's excitation frequency range, generating significant noise. Furthermore, the motor bushing gradually hardens over time, increasing the vibration transmitted to the outer drum. This increases the amplitude of the local structural vibration in the outer drum and the loudness of abnormal noise.

[0003] How to reduce the influence of the excitation (vibration) generated by the motor on the outer drum is a technical problem that needs to be solved at present. Utility Model Content

[0004] Therefore, the utility model provides a washing machine that can solve the technical problem in the prior art that the motor is directly arranged on the outer drum, which causes the outer drum to easily resonate.

[0005] The utility model provides a washing machine, comprising an outer drum and an inner drum, wherein the inner drum is rotatably arranged inside the outer drum, a bearing seat is provided at the bottom of the outer drum, a transmission shaft is provided on the bearing seat, a first end of the transmission shaft is connected to the inner drum, a bracket is provided on the bearing seat, a motor is provided on the bracket, and an output shaft of the motor is transmission-connected to the transmission shaft.

[0006] In some embodiments, a driven wheel is provided at the second end of the transmission shaft, a driving wheel is provided on the output shaft, and the driving wheel and the driven wheel are driven via a belt.

[0007] In some embodiments, a driven gear is provided at the second end of the transmission shaft, a driving gear is provided on the output shaft, and the driving gear and the driven gear are driven by a chain.

[0008] In some embodiments, the bearing seat includes an outer cylindrical surface, the bracket includes a first end and a second end relative to each other, the first end of the bracket is provided with a first through hole, and the first through hole is interference-fitted on the outer cylindrical surface of the bearing seat.

[0009] In some embodiments, the outer cylindrical surface of the bearing seat includes a first outer cylindrical surface and a second outer cylindrical surface, the diameter of the first outer cylindrical surface is smaller than the diameter of the second outer cylindrical surface, and the first outer cylindrical surface and the second outer cylindrical surface are connected via a first end surface;

[0010] The first through hole is sleeved on the first outer circular surface, and the first end of the bracket is in contact with the first end surface.

[0011] In some embodiments, a second through hole is provided at the second end of the bracket, and the output shaft of the motor passes through the second through hole.

[0012] In some embodiments, the motor is spaced apart from the outer drum.

[0013] In some embodiments, a rubber layer is provided at the connection between the bearing seat and the outer drum.

[0014] In some embodiments, the bracket has a stiffness greater than a stiffness of the outer drum.

[0015] The utility model sets a bracket, fixes the bracket on the bearing seat, and then fixes the motor on the bracket. In this way, compared with the prior art in which the motor is directly fixed on the outer drum, the motor of the present application is no longer in direct contact with the outer drum, and the excitation (vibration) generated by the motor will not directly act on the outer drum, thereby reducing the possibility of the outer drum being affected by the motor operation and generating resonance, thereby reducing the noise when the washing machine is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. For those skilled in the art, other implementation drawings can be derived from the provided drawings without inventive effort.

[0017] Figure 1 This is a schematic structural diagram of the outer drum of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the outer drum of an embodiment of the present utility model along the radial direction of the bearing seat;

[0019] Figure 3 This is a schematic diagram of the outer drum structure when a bracket, a motor and a belt are provided in an embodiment of the utility model;

[0020] Figure 4 This is a bottom schematic diagram of the outer drum of an embodiment of the present utility model;

[0021] Figure 5 This is an embodiment of the utility model Figure 4 Middle AA section view;

[0022] Figure 6 This is a schematic diagram of an embodiment of the present invention in which the outer drum is provided with a bracket;

[0023] Figure 7 This is a schematic diagram of a bracket according to an embodiment of the present utility model;

[0024] Figure 8 This is a schematic diagram of the prior art in which the motor is directly fixed to the outer drum;

[0025] The accompanying drawings are:

[0026] 1. Bracket; 101. First through hole; 102. Second through hole; 2. Outer drum; 3. Motor; 401. Driving pulley; 402. Driven pulley; 5. Belt; 6. Bearing seat. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0031] The utility model provides a washing machine, which can solve the technical problem in the prior art that a motor is directly arranged on an outer drum, causing the outer drum to easily resonate and thus generate noise.

[0032] See also Figure 1-8 As shown, a washing machine includes an outer drum 2 and an inner drum, the inner drum is rotatably arranged inside the outer drum 2, a bearing seat 6 is provided at the bottom of the outer drum 2, a transmission shaft is provided on the bearing seat 6, a first end of the transmission shaft is connected to the inner drum, a bracket 1 is provided on the bearing seat 6, a motor 3 is provided on the bracket 1, and the output shaft of the motor 3 is transmission-connected to the transmission shaft.

[0033] The motor 3 of the prior art is directly fixed on the outer drum 2, as shown in FIG. Figure 8 As shown, the excitation (vibration) generated by the motor 3 can easily cause the outer drum 2 to resonate; the motor 3 of the present application is fixed by a bracket 1 arranged on the bearing seat 6, so that the excitation generated by the motor 3 when working will not be directly transmitted to the outer drum 2, thereby reducing the adverse effect of the motor 3 on the outer drum 2.

[0034] Specifically, a bracket 1 is used to fix the motor 3 on the bearing seat 6 of the drum washing machine, and then the vibration of the motor 3 is transmitted to the bearing seat 6 through the bracket 1, and the bearing seat 6 then transmits the vibration to the outer drum. Since the stiffness of the bearing seat 6 is greater than the stiffness of the outer drum 2 (common technical knowledge in this field), the fixed frequency of the bracket 1 is outside the range of the motor 3 rotation frequency, and therefore will not be excited to resonate with the rotation frequency of the motor 3. In addition, the structural stiffness of the outer drum 2 directly connected to the circumference of the bearing seat 6 is also relatively high, and the local mode is also relatively high, making it difficult to be excited to resonate with the rotation frequency of the motor 3, and therefore it is not easy to generate large noise. This design structure can better prevent the rotation frequency of the motor 3 from exciting the local mode of the original motor 3 installation position of the outer drum 2 of the washing machine.

[0035] Specifically, the entire bracket 1 is made of metal.

[0036] Specifically, a bearing is provided in the bearing seat 6 , the bearing and the bearing seat 6 are interference fit, and a gap is set between the inner roller and the bearing.

[0037] Preferably, Figure 3 、 Figure 4 、 Figure 5 As shown, a driven wheel 402 is provided at the second end of the transmission shaft, a driving wheel 401 is provided on the output shaft, and the driving wheel 401 and the driven wheel 402 are driven via a belt 5.

[0038] The transmission is carried out by the belt 5 , which has a certain toughness. The belt 5 has the function of absorbing energy and reducing vibration during operation, and can effectively reduce the impact of the motor 3 on the bearing seat 6 when rotating, thereby reducing the vibration of the outer drum 2 .

[0039] Preferably (not shown), a driven gear is provided at the second end of the transmission shaft, a driving gear is provided on the output shaft, and the driving gear and the driven gear are driven by a chain.

[0040] Through the chain transmission, the chain and the gear cooperate to more accurately transmit the torque of the motor 3 without slipping, thereby improving the working performance of the washing machine.

[0041] Preferably, Figure 1-2 As shown, the bearing seat 6 includes an outer cylindrical surface, and the bracket 1 includes a first end and a second end opposite to each other. The first end of the bracket 1 is provided with a first through hole 101 , and the first through hole 101 is interference-fitted on the outer cylindrical surface of the bearing seat 6 .

[0042] The bracket 1 is interference-fitted on the outer circumferential surface of the bearing seat 6 through the first through hole 101, thereby improving the fixing accuracy of the bracket 1 and preventing the bracket 1 from being displaced along the radial direction of the bearing seat 6, thereby preventing the distance between the output shaft and the transmission shaft of the motor 3 from changing, thereby preventing the transmission effect between the motor 3 and the inner drum from decreasing.

[0043] Preferably, the outer cylindrical surface of the bearing seat 6 includes a first outer cylindrical surface and a second outer cylindrical surface, the diameter of the first outer cylindrical surface is smaller than the diameter of the second outer cylindrical surface, and the first outer cylindrical surface and the second outer cylindrical surface are connected via a first end surface;

[0044] The first through hole 101 is sleeved on the first outer circular surface, and the first end of the bracket 1 is in contact with the first end surface.

[0045] By setting the first outer cylindrical surface and the second outer cylindrical surface, the first end of the bracket 1 is fitted with the first end surface, and the first end surface limits the bracket 1 axially (axially of the bearing seat 6), so that when the motor 3 is working, there is basically no axial force between the output shaft of the motor 3 and the transmission shaft, thereby improving the stability of the output torque of the motor 3.

[0046] Furthermore, the first end face is provided with a plurality of threaded holes, and the first end of the bracket 1 is provided with a plurality of screw holes corresponding to the threaded holes. After the bolts pass through the screw holes, they are threadedly engaged in the threaded holes, and then the bracket 1 is fixed to the bearing seat 6 by the bolts. In this way, the bracket 1 can be fixed without increasing the axial size of the drum washing machine.

[0047] Preferably, Figure 6 and Figure 7 As shown, a second through hole 102 is provided at the second end of the bracket 1 , and the output shaft of the motor 3 passes through the second through hole 102 .

[0048] When motor 3 is secured to bracket 1, the output shaft of motor 3 passes through second through-hole 102. The output shaft and the main body of motor 3 are located on either side of second through-hole 102, which helps improve the stability of motor 3 fixed to bracket 1. Furthermore, multiple threaded holes are provided around second through-hole 102. A connecting plate is provided at one end of motor 3 near the output shaft. The connecting plate has through-holes opposite the threaded holes, and bolts pass through the through-holes and engage with the threaded holes to secure motor 3.

[0049] Preferably, Figure 3 As shown, the motor 3 and the outer drum 2 are spaced apart.

[0050] The vibration and excitation generated by the motor 3 when working will not be directly transmitted to the outer drum 2, thereby reducing the influence of the motor 3 on the outer drum 2.

[0051] Preferably, a rubber layer is provided at the connection between the bearing seat 6 and the outer drum 2 .

[0052] The bearing seat 6 and the outer drum 2 are sealed by the rubber coating process, which effectively improves the sealing between the outer drum 2 and the bearing seat 6. Specifically, the connection between the bracket 1 and the bearing seat 6 is avoided during the rubber coating, so that the bracket 1 and the bearing seat 6 are accurately connected.

[0053] Preferably, the rigidity of the bracket 1 is greater than the rigidity of the outer drum 2 .

[0054] The stiffness of bracket 1 is greater than that of outer drum 2, which places the fixed frequency of bracket 1 outside the rotational frequency range of motor 3. Therefore, bracket 1 is not stimulated to resonate by the rotational frequency of motor 3, further reducing the impact of motor 3 on outer drum 2. Furthermore, the portion of outer drum 2 that is in direct contact with bearing seat 6 has a higher stiffness and local modal properties, making it less likely to be stimulated to resonate by the rotational frequency of motor 3. This reduces the possibility of resonance in outer drum 2, thereby reducing the operating noise of the washing machine.

[0055] Furthermore, the connection part between the first end of the bracket 1 and the second end of the bracket 1 is an I-beam, and the first end and the second end are steel plates. In this way, the connection stiffness between the first end of the bracket 1 and the second end of the bracket 1 can be improved, and the position accuracy of the motor 3 relative to the bearing seat 6 can be improved.

[0056] Installation process: The first end of bracket 1 is bolted to bearing seat 6. The drive shaft passes through first through-hole 101, and driven pulley 402 is mounted on the drive shaft. After the output shaft of motor 3 passes through second through-hole 102, motor 3 is bolted to the second end of bracket 1. Drive pulley 401 is mounted on the output shaft, and belt 5 is passed over both driven pulley 402 and driving pulley 401. When motor 3 is in operation, belt 5 drives the output shaft, which in turn drives the inner drum to wash the clothes inside. During operation, motor 3 generates vibrations, which are then transmitted to bracket 1. Since bracket 1 is screwed to bearing seat 6, the vibrations are then transmitted to bearing seat 6, where they are dissipated. Since motor 3 does not directly contact outer drum 2, the motor 3's rotational frequency is effectively prevented from exciting local modes in outer drum 2 where motor 3 is originally installed, thereby reducing vibration and noise in outer drum 2.

[0057] It is easy for those skilled in the art to understand that, under the premise of no conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. Such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A washing machine, comprising an outer drum (2) and an inner drum, wherein the inner drum is rotatably arranged inside the outer drum (2), a bearing seat (6) is provided at the bottom of the outer drum (2), a transmission shaft is provided on the bearing seat (6), a first end of the transmission shaft is connected to the inner drum, and is characterized in that: A bracket (1) is provided on the bearing seat (6), a motor (3) is provided on the bracket (1), and an output shaft of the motor (3) is in transmission connection with the transmission shaft.

2. The washing machine according to claim 1, wherein A driven wheel (402) is provided at the second end of the transmission shaft, a driving wheel (401) is provided on the output shaft, and transmission is provided between the driving wheel (401) and the driven wheel (402) via a belt (5).

3. The washing machine according to claim 1, wherein A driven gear is provided at the second end of the transmission shaft, a driving gear is provided on the output shaft, and the driving gear and the driven gear are driven by a chain.

4. The washing machine according to claim 1, wherein The bearing seat (6) includes an outer cylindrical surface, the bracket (1) includes a first end and a second end opposite to each other, the first end of the bracket (1) is provided with a first through hole (101), and the first through hole (101) is interference-fitted on the outer cylindrical surface of the bearing seat (6).

5. The washing machine according to claim 4, characterized in that The outer cylindrical surface of the bearing seat (6) comprises a first outer cylindrical surface and a second outer cylindrical surface, the diameter of the first outer cylindrical surface is smaller than the diameter of the second outer cylindrical surface, and the first outer cylindrical surface and the second outer cylindrical surface are connected via a first end surface; The first through hole (101) is sleeved on the first outer circular surface, and the first end of the bracket (1) is in contact with the first end surface.

6. The washing machine according to claim 4, characterized in that The second end of the bracket (1) is provided with a second through hole (102), and the output shaft of the motor (3) passes through the second through hole (102).

7. The washing machine according to claim 1, wherein The motor (3) and the outer drum (2) are spaced apart.

8. The washing machine according to claim 1, wherein A rubber coating is provided at the connection between the bearing seat (6) and the outer drum (2).

9. The washing machine according to any one of claims 1 to 8, characterized in that: The rigidity of the bracket (1) is greater than the rigidity of the outer drum (2).

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