Overspeed protection structure of washing machine

Abstract

The utility model discloses an overspeed protection structure of a washing machine. The overspeed protection structure comprises an outer sleeve, a supporting assembly, a guiding assembly and a cooling device. The supporting assembly is coaxially and fixedly installed on the outer wall of the outer sleeve, and lubricating oil is placed in a cavity of the supporting assembly. The guide assembly and the supporting assembly are coaxially arranged and abut against each other, and the guide assembly limits the movement of the outer sleeve in the axial direction and the radial direction; and the cooling device is in contact with the lubricating oil in the cavity of the supporting assembly. By arranging the guide assembly, the washing machine is prevented from being damaged by radial shaking and axial movement, and the cooling pipeline for cooling lubricating oil is placed in the cavity of the guide assembly, so that heat caused by factors such as friction can be quickly released through the cooling pipeline in the working process of the washing machine, and the service life of the washing machine is prolonged. And the running temperature of the washing machine drum is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of washing machines, in particular to an overspeed protection structure for a washing machine. Background Art

[0002] In the prior art, the washing machine usually adopts a driving form in which the motor directly drives the inner cylinder of the washing machine to rotate. The direct drive theoretically has the advantages of improving efficiency and reducing noise. However, at present, the diameter of the inner barrel of the washing machine is relatively large, and there will be a problem that the dynamic balance is difficult to adjust in the direct drive mode. The unbalanced centrifugal force vibration is likely to cause damage to the motor and the washing machine drum.

[0003] The centrifugal force of the washing machine is generated by the rotation of the drum. The protective bearing slides back and forth under the drive of the pump shaft. It usually needs a protection structure for limit. After the protection structure bears a large stress, the frictional heat generation is intensified, and the generated heat is not easy to dissipate in the sealed cavity, which will cause quality problems such as damage to the protection structure. Content of the Utility Model

[0004] In order to solve the above technical problems, the utility model provides an overspeed protection structure for a washing machine that can effectively prevent radial jitter and axial movement and quickly dissipate heat.

[0005] The technical solution of the utility model is: an overspeed protection structure for a washing machine, including: an outer sleeve, a support assembly, a guiding assembly and a cooling device; the support assembly is coaxially and fixedly installed on the outer wall of the outer sleeve, and lubricating oil is placed in the cavity of the support assembly; the guiding assembly is coaxially arranged with the support assembly and abuts against each other, and the guiding assembly restricts the movement of the outer sleeve along the axial and radial directions; the cooling device is in contact with the lubricating oil in the cavity of the support assembly.

[0006] By adopting the above technical solution, the guiding assembly plays a centering role for the outer sleeve, avoiding axial and radial offsets during the rotation of the outer sleeve, and providing sufficient clamping force on the basis of centering the outer sleeve to resist the centrifugal force generated when the drum rotates at high speed, effectively preventing the outer sleeve from shifting during centrifugal motion. By placing a cooling device for cooling the lubricating oil, when the outer sleeve rotates, the heat of the lubricating oil caused by factors such as movement friction can be quickly released through the cooling pipeline, thereby reducing the temperature of the support assembly and the guiding assembly and improving their service life.

[0007] Further, the cooling device includes an oil storage chamber and a cooling pipeline. The oil storage chamber is communicated with the cavity of the support assembly for placing lubricating oil, and the cooling pipeline is located in the oil storage chamber and is in contact with the lubricating oil.

[0008] Further, the support assembly includes a support ring coaxially arranged with the outer sleeve. A plurality of rods are symmetrically arranged on the outer side of the support ring. One end of each rod is rotatably connected with a stable ball. The rotation axis of the stable ball is parallel to the axis of the outer sleeve, and the stable ball abuts against the guiding assembly.

[0009] The track can ensure that the rotational movement of the machine proceeds along a predetermined path, reduce the vibration of the machine during rotation, protect mechanical components, and thus improve the accuracy and repeatability of the movement. Axial limit can prevent the motor output shaft from moving axially, ensuring the relative positions of the components of the transmission system are fixed.

[0010] Further, the support ring is connected to the outer sleeve through a connecting structure. A plurality of the connecting structures are arranged along the circumferential direction. The connecting structure includes a set of bridging plates arranged symmetrically, and a connecting flat plate connecting the two bridging plates. A buffer cavity is formed at the connection of the two bridging plates and the connecting flat plate, and the buffer cavity faces the outer sleeve.

[0011] By adopting the above technical solution, by installing a buffer structure, additional stability can be provided when the rotating cylinder rotates at a high speed. The buffer structure can absorb and disperse the vibration generated by the high-speed rotation of the rotating cylinder, reducing the impact on surrounding structures or components. The high-speed rotating cylinder may generate a large amount of heat. The buffer structure, in cooperation with the heat dissipation design, can help the rotating cylinder dissipate heat and keep the equipment operating at an appropriate temperature.

[0012] Further, the guiding assembly includes a trapezoidal ring groove. The base of the trapezoid in the cross-section of the trapezoidal ring groove is narrower at the end away from the outer sleeve than at the end close to the outer sleeve.

[0013] By adopting the above technical solution, the faster the rotation speed, the tighter the fit between the support assembly and the trapezoidal ring groove, which can further ensure the stability of the outer sleeve during rotation and reduce the occurrence of jitter.

[0014] Further, the coolant inlet and the coolant outlet of the cooling pipeline are located outside the oil storage chamber.

[0015] By adopting the above technical solution, when the coil needs to be cleaned, repaired or replaced, the inlet and outlet being located outside can simplify these operations because the pipeline can be directly accessed without disassembling the components inside the water heater.

[0016] Further, the cooling pipeline is a circular coil, and the number of turns of the coil of the cooling pipeline is 6 - 10 turns.

[0017] By adopting the above technical solution, the metal material has high thermal conductivity, which can quickly transfer heat from the fluid to the external environment or from the external environment to the fluid, improving the cooling efficiency. By designing the cooling pipeline to include a certain number of circular coiled pipes, the contact area between the cooling pipeline and the lubricating oil can be increased as much as possible, which helps to improve the cooling effect.

[0018] The beneficial technical effects of the present utility model are as follows:

[0019] 1. By using a clamping system in which the support component and the guiding component cooperate with each other, the displacement of the drum during centrifugal motion can be effectively prevented, and the damage of the washing machine caused by radial jitter and axial movement can be prevented, improving the stability and safety of the equipment during high-speed operation.

[0020] 2. A cooling pipeline for cooling the lubricating oil is placed in the cavity of the guiding component, so that during the operation of the washing machine, the heat generated due to factors such as friction can be quickly released through this cooling pipeline, thereby reducing the operating temperature of the drum of the washing machine. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the support structure of the present utility model;

[0022] Figure 2 is a front view of the present utility model;

[0023] Figure 3 is Figure 2 a sectional view taken along the A-A plane of

[0024] Figure 4 is a schematic diagram of the structure of the present utility model;

[0025] Figure 5 is Figure 2 a sectional view taken along the B-B plane of

[0026] In the figure: 1. Outer sleeve; 2. Guiding component; 21. Guiding ring; 22. Trapezoidal ring groove; 3. Support component; 31. Bridging plate; 32. Connecting flat plate; 33. Support ring; 34. Rod; 35. Stable ball; 4. Oil storage chamber; 5. Lubricating oil; 6. Cooling pipeline; 61. Coolant inlet; 62. Coolant outlet; 63. Cooling pipeline main body. Detailed Embodiments

[0027] In order to be able to more clearly understand the technical means of the present utility model and implement it in accordance with the content of the specification, the following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0028] As Figures 1 to 3As shown in the figure, this embodiment provides an overspeed protection mechanism for a washing machine, including: an outer sleeve 1, a guiding component 2, and a supporting component 3. The guiding component 2 is fixedly installed on the outer shell or base of the washing machine. The guiding component 2 is a guiding ring 21 coaxial with the outer sleeve 1 and a trapezoidal ring groove 22 opened on the inner side of the guiding ring 21. As Figure 3 shown, the base of the trapezoid in the cross-section of the trapezoidal ring groove 22 at the end away from the outer sleeve 1 is narrower than the base at the end close to the outer sleeve 1.

[0029] As Figure 1 shown, the supporting component 3 includes a supporting ring 33, two symmetrically arranged bridging plates 31, and a connecting flat plate 32 for connecting the two bridging plates 31. The guiding ring 33 is fixedly welded to the outer sleeve 1 through the bridging plates 31 and the connecting flat plate 32. A buffer cavity is formed at the connection of the two bridging plates 31 and the connecting flat plate 32, and the buffer cavity faces the outer sleeve 1. A plurality of connection structures formed by the bridging plates 31 and the connecting flat plate 32 are arranged along the circumferential direction.

[0030] The supporting component 3 further includes a plurality of rods 34 fixed on the outer side of the guiding ring 33 and stabilizing balls 35 rotatably connected to one end of the rods. The axis of the rod 34 is parallel to the axis of the outer sleeve 1, and the axis of rotation of the stabilizing ball 35 is parallel to the axis of the outer sleeve 1. The stabilizing ball 35 abuts against the groove surface of the trapezoidal ring groove 22. Through the arrangement of multiple abutting points, the rotation accuracy of the guiding ring 32 is ensured.

[0031] Because the cross-section of the trapezoidal ring groove 31 is trapezoidally designed, when the rotation speed is faster, the fit between the stabilizing ball 35 and the trapezoidal ring groove 22 is tighter, thereby ensuring the stability of the motor during use and reducing the occurrence of jitter phenomena.

[0032] As Figure 5 shown, lubricating oil 5 is added to the trapezoidal ring groove 22 to improve the lubricity when the guiding component 2 and the supporting component 3 rotate at high speed. An oil storage chamber 4 with a cavity is used to store the lubricating oil 5.

[0033] The cooling pipeline 6 includes a coolant inlet 61, a coolant outlet 62, and a main body part 63 located between the above-mentioned coolant inlet 61 and coolant outlet 62. The main body part 63 of the cooling pipeline 6 is located in the oil storage chamber 4, and the coolant inlet 61 and coolant outlet 62 of the cooling pipeline 6 are located outside the oil storage chamber 4.

[0034] The main body part 63 of the cooling pipeline 6 is in contact with the lubricating oil 5 filled in the oil storage chamber 4. The coolant flows into the main body part 63 of the cooling pipeline 6 through the coolant inlet 61 and flows out from the coolant outlet 62, which is used to cool the lubricating oil 5.

[0035] The cooling pipeline 6 is a circular coiled pipe made of a metal material, and the number of coils is 6 to 8. The good heat conductivity of the metal material can quickly transfer the heat of the lubricating oil 5 with a relatively high temperature to the coolant with a relatively low temperature. Condensed water is used as the coolant, and when it flows through the cooling pipeline 6, it can forcibly and quickly take away the heat of the lubricating oil 5, and the cooling effect is better.

[0036] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A water washing machine overspeed protection structure, characterized in that: include: An outer sleeve (1), a guide assembly (2), a support assembly (3) and a cooling device; The support assembly (3) is coaxially fixedly mounted on the outer wall of the outer sleeve (1), and lubricating oil (5) is placed in the cavity of the support assembly (3); The guide assembly (2) and the support assembly (3) are coaxially arranged and mutually conflicting, and the guide assembly (2) limits the axial and radial movement of the outer sleeve (1); The cooling device is in contact with the lubricating oil (5) in the cavity of the support assembly (3).

2. The overspeed protection structure of a washing machine according to claim 1, characterized in that: The cooling device comprises an oil storage chamber (4) and a cooling pipeline (6); the oil storage chamber (4) is connected to a cavity of the support assembly (3) for placing lubricating oil (5); and the cooling pipeline (6) is located in the oil storage chamber (4) and in contact with the lubricating oil (5).

3. The overspeed protection structure of a washing machine according to claim 1, characterized in that: The support assembly (3) comprises a support ring (33) coaxially arranged with the outer sleeve (1), a plurality of rods (34) are symmetrically arranged on the outer side of the support ring (33), one end of the rod (34) is rotatably connected to a stabilizing ball (35), the rotation axis of the stabilizing ball (35) is parallel to the axis of the outer sleeve (1), and the stabilizing ball (35) abuts against the guide assembly (2).

4. The overspeed protection structure of a washing machine according to claim 3 is characterized in that: The support ring (33) is connected to the outer sleeve (1) via a connection structure. The connection structure is provided in multiple groups along the circumferential direction. The connection structure comprises a group of symmetrically arranged bridge plates (31) and a connecting plate (32) connecting two of the bridge plates (31). The connection between the two bridge plates (31) and the connecting plate (32) forms a buffer cavity, which faces the outer sleeve (1).

5. The overspeed protection structure of a washing machine according to claim 1, characterized in that: The guide assembly (2) comprises a trapezoidal annular groove (22), the bottom edge of the trapezoidal cross section of the trapezoidal annular groove (22) being narrower at the end away from the outer sleeve (1) than at the end close to the outer sleeve (1).

6. The overspeed protection structure of a washing machine according to claim 2, characterized in that: The cooling liquid inlet (61) and the cooling liquid outlet (62) of the cooling pipeline (6) are located outside the oil storage chamber (4).

7. A washing machine overspeed protection structure according to claim 2 or 6, characterized in that: The cooling pipeline (6) is a circular coil, and the number of coils in the cooling pipeline (6) is 6 to 10.

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