Roller washing machine belt wheel noise reduction structure and washing machine

Abstract

The utility model discloses a roller washing machine belt wheel noise reduction structure and a washing machine, and belongs to the technical field of roller washing machine belt wheel noise reduction, the roller washing machine belt wheel noise reduction structure comprises an outer barrel, a belt wheel mechanism and a sound insulation plate, the rear end face of the outer barrel is provided with a plurality of grooves; the belt wheel mechanism comprises a belt wheel, a motor and a belt; the sound insulation plate is fixed to the rear end face of the outer barrel, the sound insulation plate is located between the belt wheel and the rear end face, and the sound insulation plate at least shields a groove in the orthographic projection range of the belt wheel on the rear end face of the outer barrel. According to the utility model, the sound insulation plate is fixed on the rear end face of the outer barrel and at least shields the groove in the orthographic projection range of the belt wheel on the rear end face of the outer barrel, so that wind generated in the high-speed rotation process of the belt wheel cannot enter the shielded groove, and the wind noise generated in the high-speed rotation process of the belt wheel is prevented from being amplified; the purpose of reducing the noise of the whole washing machine is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of noise reduction of a drum washing machine pulley, and in particular relates to a noise reduction structure of a drum washing machine pulley and a washing machine. Background Art

[0002] The washing method of the drum washing machine is designed to imitate the principle of a hammer hitting clothes. The mechanical work of the motor is used to rotate the drum. The clothes are continuously lifted up and dropped down in the drum, and then lifted up and dropped again, repeating the movement. The combined action of detergent and water makes the clothes clean.

[0003] The drum inside the drum washing machine is divided into two parts: an outer drum and an inner drum. The outer drum is mounted on the outside of the inner drum. When in use, the inner drum rotates inside the outer drum to wash clothes.

[0004] At present, there are two main driving modes for the inner barrel of a drum washing machine: motor belt drive and motor direct coupling drive. Among them, the motor belt drive is to use a belt and a pulley to transmit the power on the motor output shaft to the inner barrel. Specifically, a rotating shaft arranged along the axial direction of the outer barrel is rotatably installed at the rear end center position of the outer barrel through a bearing, one end of the rotating shaft extends to the inside of the outer barrel and is fixedly connected to the inner barrel, and the other end of the rotating shaft is fixedly connected to the pulley, that is, the pulley is directly opposite to the rear end of the outer barrel. When in use, the pulley is driven to rotate by the output shaft of the motor through the belt.

[0005] However, since the outer barrel requires both sufficient structural strength and a lightweight design, a large number of grooves are formed on the outer surface of the rear end of the outer barrel due to the reinforcing rib structure. During the high-speed rotation of the pulley, wind is generated due to the swing between the widths of the pulley or the flatness of the pulley itself. The generated wind is transmitted to the grooves outside the rear end of the outer barrel, thereby forming a sound cavity in the grooves of the outer barrel. The wind noise generated by the rotation of the pulley is amplified, which ultimately causes the noise of the washing machine to increase.

[0006] In the related art, wind noise is often reduced by changing the shape of the pulley and making it a smooth surface. However, the above method can only reduce the wind generated by the rotation of the pulley. The sound cavity effect of the groove behind the outer barrel still exists. As long as the sound cavity exists, even if there is a small wind, it will make a very loud sound under certain conditions. Utility Model Content

[0007] The utility model aims to solve the problem of high noise in the existing drum washing machine and proposes a drum washing machine pulley noise reduction structure and a washing machine.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A drum washing machine pulley noise reduction structure, comprising:

[0010] An outer barrel, wherein a plurality of grooves are arranged on the rear end surface of the outer barrel;

[0011] a pulley mechanism, the pulley mechanism comprising a pulley, a motor and a belt, the pulley being arranged outside the rear end surface of the outer barrel and connected to the outer barrel through a rotating shaft and a bearing; and

[0012] A sound insulation board is fixed to the rear end surface of the outer barrel, and the sound insulation board is located between the pulley and the rear end surface, and the sound insulation board at least blocks the groove within the range of the positive projection of the pulley on the rear end surface of the outer barrel.

[0013] Preferably, the sound insulation plate is annular, and the outer barrel, the pulley and the sound insulation plate are coaxially arranged.

[0014] Preferably, the outer diameter of the sound insulation board is greater than or equal to the outer diameter of the pulley.

[0015] Preferably, a bearing cylinder is provided at the center of the rear end surface of the outer barrel, and the rotating shaft and a part of the bearing structure are placed in the bearing cylinder;

[0016] The sound insulation board is provided with a hole at a position corresponding to the bearing cylinder, and the bearing cylinder passes through the hole.

[0017] Preferably, the sound insulation plate is sleeved on the bearing cylinder through the hole in an interference fit manner.

[0018] Preferably, the pulley is a multi-spoke structure or a spokeless disc structure.

[0019] The utility model also provides a washing machine, comprising the above-mentioned drum washing machine pulley noise reduction structure.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0021] In the utility model, a sound insulation board is fixed on the rear end surface of the outer barrel, and the sound insulation board at least blocks the groove within the positive projection range of the pulley on the rear end surface of the outer barrel. The wind generated during the high-speed rotation of the pulley cannot enter the blocked groove, thereby avoiding the wind noise generated during the high-speed rotation of the pulley from being amplified, thereby achieving the purpose of reducing the noise of the entire washing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a drum washing machine pulley noise reduction structure proposed by the utility model;

[0023] Figure 2 The utility model is a partial exploded structural schematic diagram of a drum washing machine pulley noise reduction structure.

[0024] Legend: 1. Outer barrel; 11. Groove; 12. Bearing cylinder; 2. Pulley; 3. Sound insulation board; 31. Hole; 4. Motor; 5. Belt. DETAILED DESCRIPTION

[0025] The utility model is described below in conjunction with specific embodiments.

[0026] This embodiment provides a drum washing machine pulley noise reduction structure, such as Figure 1 and Figure 2 As shown, it includes an outer barrel 1, a pulley mechanism and a sound insulation board 3, wherein the pulley mechanism includes a pulley 2, a motor 4 and a belt 5, the motor 4 is fixed on the outer surface of the outer barrel 1, the pulley 2 is connected to the output shaft of the motor 4 through the belt 5, after starting the motor 4, the output shaft of the motor 4 drives the pulley 2 to rotate through the belt 5, because the pulley 2 is fixedly connected to the inner barrel inside the outer barrel 1 through the rotating shaft, the inner barrel inside the outer barrel 1 can be driven to rotate, and a plurality of grooves 11 are arranged on the rear end surface of the outer barrel 1, so as to improve the structural strength of the outer barrel 1 and minimize the weight of the outer barrel 1.

[0027] like Figure 2 As shown, the sound insulation board 3 is fixed to the rear end surface of the outer barrel 1. The specific fixing method of the sound insulation board 3 can be bolt fixing or other fixing methods, which are not specifically limited here. In this embodiment, the sound insulation board 3 should at least block the groove 11 within the orthographic projection range of the pulley 2 on the rear end surface of the outer barrel 1, that is, the groove 11 within the orthographic projection range of the pulley 2 on the rear end surface of the outer barrel 1 needs to be completely blocked by the sound insulation board 3, or, except for the groove 11 located within the orthographic projection range of the pulley 2 on the rear end surface of the outer barrel 1, the remaining grooves 11 can also be partially or completely blocked by the sound insulation board 3.

[0028] By fixing a sound insulation board 3 for blocking wind on the rear end face of the outer barrel 1, and making the sound insulation board 3 at least block the groove 11 within the range of the positive projection of the pulley 2 on the rear end face of the outer barrel 1, the wind generated during the high-speed rotation of the pulley 2 cannot enter the blocked groove 11, thereby avoiding the wind noise generated when the pulley 2 rotates at a high speed from being amplified, thereby achieving the purpose of reducing the noise of the entire washing machine.

[0029] The shape of the sound insulation board 3 can be a bowl shape (not shown in the figure). In this case, the pulley 2 can be set inside the bowl-shaped sound insulation board 3, so that it can also play a role in wind protection. Of course, when using this bowl-shaped structure, it is necessary to open a groove on the edge of the bowl mouth for the belt 5 to pass through.

[0030] The shape of the sound insulation board 3 can be rectangular (not shown in the figure). The rectangular sound insulation board 3 can achieve the function of wind blocking and has low manufacturing cost.

[0031] As a preferred method, Figure 1 and Figure 2 As shown, the sound insulation board 3 in this embodiment is in the shape of a ring, and the outer barrel 1, the pulley 2 and the sound insulation board 3 are coaxially distributed, and the ring-shaped sound insulation board 3 has a good overall aesthetic appearance.

[0032] When the sound insulation board 3 is annular, the outer diameter of the sound insulation board 3 is greater than or equal to the outer diameter of the pulley 2, so that the groove 11 within the positive projection range of the pulley 2 on the rear end surface of the outer barrel 1 can be completely blocked to prevent the wind noise from being amplified.

[0033] The side of the sound insulation board 3 that contacts the outer barrel 1 can adopt a shape that matches the outer barrel 1, so as to prevent a gap from appearing between the sound insulation board 3 and the outer barrel 1, thereby preventing wind from entering the groove 11 through the gap between the sound insulation board 3 and the outer barrel 1, and also preventing foreign matter such as dust from entering the groove 11.

[0034] A bearing cylinder 12 is provided at the center position of the rear end surface of the outer barrel 1, and part of the structure of the rotating shaft and the bearing is placed in the bearing cylinder 12. Specifically, the rotating shaft for connecting the pulley 2 and the inner barrel passes through the bearing cylinder 12, and the bearing for realizing the rotational connection between the rotating shaft and the outer barrel 1 is clamped in the inside of the bearing cylinder 12. A hole 31 is opened at the position of the sound insulation board 3 corresponding to the bearing cylinder 12, and the bearing cylinder 12 passes through the hole 31. Furthermore, the sound insulation board 3 is sleeved on the bearing cylinder 12 through the hole 31 in an interference fit manner. In this way, a gap can be avoided between the hole 31 and the bearing cylinder 12, which is beneficial to prevent the wind generated during the high-speed rotation of the pulley 2 from entering the groove 11 near the position of the bearing cylinder 12.

[0035] like Figure 1 and Figure 2 As shown, the pulley 2 in this embodiment is a multi-spoke structure or a spokeless disc structure.

[0036] The utility model also provides a washing machine, comprising the above-mentioned drum washing machine pulley noise reduction structure.

[0037] The method of using this embodiment is as follows: during the process of assembling the inner drum of the washing machine, the sound insulation board 3 needs to be installed on the bearing cylinder 12 using the hole 31 thereon, and then the inner edge and outer edge of the sound insulation board 3 are fixed to the outer barrel 1 using bolts and other structures. During the use of the washing machine, when the pulley 2 rotates at high speed, wind will be generated between the widths of the pulley 2 or the swing of the flatness of the pulley 2 itself. At this time, due to the presence of the sound insulation board 3, the wind generated by the pulley 2 will not enter the groove 11, thereby preventing the wind from generating noise at the groove 11 of the outer barrel 1, and also preventing the wind sound generated by the high-speed rotation of the pulley 2 from forming a sound cavity at the groove 11 and being amplified, thereby reducing the noise of the entire washing machine.

Claims

1. A drum washing machine pulley noise reduction structure, characterized in that: include: An outer barrel (1), wherein a plurality of grooves (11) are arranged on a rear end surface of the outer barrel (1); a pulley mechanism, the pulley mechanism comprising a pulley (2), a motor (4) and a belt (5), the pulley (2) being arranged outside the rear end surface of the outer barrel (1) and connected to the outer barrel via a rotating shaft and a bearing; and A sound insulation board (3), wherein the sound insulation board (3) is fixed to the rear end surface of the outer barrel (1), and the sound insulation board is located between the pulley and the rear end surface, and the sound insulation board (3) at least blocks the groove (11) within the range of the positive projection of the pulley (2) on the rear end surface of the outer barrel (1).

2. A drum washing machine pulley noise reduction structure according to claim 1, characterized in that: The sound insulation board (3) is annular, and the outer barrel (1), the pulley (2) and the sound insulation board (3) are coaxially arranged.

3. A drum washing machine pulley noise reduction structure according to claim 2, characterized in that: The outer diameter of the sound insulation board (3) is greater than or equal to the outer diameter of the pulley (2).

4. A drum washing machine pulley noise reduction structure according to claim 1, characterized in that: A bearing cylinder (12) is arranged at the center of the rear end surface of the outer barrel (1), and the rotating shaft and a part of the bearing structure are placed in the bearing cylinder (12); The sound insulation board (3) is provided with a hole (31) at a position corresponding to the bearing cylinder (12), and the bearing cylinder (12) passes through the hole (31).

5. A drum washing machine pulley noise reduction structure according to claim 4, characterized in that: The sound insulation board (3) is sleeved on the bearing cylinder (12) through the hole (31) in an interference fit manner.

6. A drum washing machine pulley noise reduction structure according to claim 1, characterized in that: The pulley (2) is a multi-spoke structure or a spokeless disc structure.

7. A washing machine, characterized in that: It comprises the drum washing machine pulley noise reduction structure as claimed in any one of claims 1 to 6.

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