Shock absorber and washing machine comprising shock absorber

[0024] The preferred embodiments of the present invention will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention. For example, although the description is described in conjunction with hydraulic oil, the present invention can obviously adopt other forms of fluid with a certain viscosity, as long as the fluid itself does not cause corrosion to the plunger and the liquid bag.

[0025] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The term of the indicated direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for ease of description, and does not indicate or imply that the device or element must have a specific orientation, be configured and operated in a specific orientation Therefore, it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0026] In addition, it should be noted that in the description of the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it may be a fixed connection or It is a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meaning of the above-mentioned terms in the present invention can be understood according to specific circumstances.

[0027] First refer to figure 1 , figure 2 with image 3 ,among them, figure 1 It is a schematic diagram of the installation position of the shock absorber for the drum washing machine of the present invention; figure 2 It is a schematic diagram of the appearance of the shock absorber for the drum washing machine of the present invention; image 3 It is a schematic cross-sectional view of the shock absorber for the drum washing machine of the present invention.

[0028] Such as figure 1 As shown, one end of the shock absorber 1 for the drum washing machine of the present invention is connected to the shell 2 of the drum washing machine, and the other end of the shock absorber 1 is connected to the bottom of the drum 3. When the drum 3 vibrates during operation At this time, the shock absorber 1 can support the drum 3 and consume the vibration energy generated by the drum 3. Specifically, such as figure 2 with image 3 As shown, the shock absorber 1 mainly includes a sleeve 11 and a first end of the sleeve 11 ( image 3 The left end of the sleeve 11 shown in) is the first fixing portion 111, the plunger 12, and the first end ( image 3 The right end of the plunger 12 shown in) is fixedly connected to the second fixing portion 121. The sleeve 11 has a first cavity 112, and the plunger 12 is provided with a second cavity 122. In the assembled state, the second end of the plunger 12 ( image 3 The left end of the plunger 12 shown in) is slidably removed from the second end of the sleeve 11 ( image 3 The right end of the sleeve 11 shown in) is inserted into the first chamber 112 of the sleeve 11. Preferably, the outer wall of the plunger 12 and the inner wall of the sleeve 11 are slidably tightly engaged. The first fixing part 111 is used to connect to the drum 3 of the washing machine, and the second fixing part 121 is used to connect to the housing 2 of the washing machine. Of course, it is understandable that the first fixing part 111 can also be connected to the housing 2 of the washing machine, and the second fixing part 121 can be connected to the drum 3 of the washing machine.

[0029] Refer to image 3 , A liquid sac 14 is provided in the first chamber 112, and a throttle 13 is provided in the liquid sac 14. The closed end of the sac 14 ( image 3 The left end of the liquid sac 14 shown in) abuts against the first chamber 112 of the sleeve 11 and is preferably fixedly connected to the sleeve 11. The open end of the sac 14 ( image 3 The right end of the liquid bladder 14 shown in) and the second end of the plunger 12 are hermetically tightly connected. The throttle member 13 includes a base 131 and a tube structure 132 fixedly connected to the base 131. The base 131 is disposed at the closed end of the liquid bag 14, and the tube structure 132 is inserted into the second chamber 122. Several damping holes 133 are provided on the tube structure, and hydraulic oil 4 is injected into the inner cavity and/or the second chamber 122 of the liquid bladder 14. When the plunger 12 slides in the first chamber 112 of the sleeve 11, Some of the damping holes 133 of the plurality of damping holes 133 are in an open/closed state, and the hydraulic oil 4 can reciprocately flow in the liquid bladder 14 and the second chamber 122 through the damping hole 133 in the open state.

[0030] Preferably, the liquid bladder 14 is made of elastic material or flexible material, such as polyurethane, silicone, rubber and other materials. The base 131 and the tube structure 132 are integrally formed. A plurality of damping holes 133 are circular in cross section and arranged on the outer wall of the tube structure 132 along the axial direction of the tube structure 132, and the axis of the damping hole 133 and the axis of the tube structure 132 have an included angle. Further preferably, the angle between the axis of the orifice 133 and the axis of the tube structure 132 is 90°, that is, the orifice 133 is arranged perpendicular to the tube structure 132. The outer edge of the base 131 matches the inner wall of the first chamber 112 in the circumferential direction. For example, the first chamber 112 is a cylindrical cavity, and the base 131 is a cylindrical structure. The cross-sectional diameter of the cylindrical structure is equal to that of the cylindrical cavity. The cross-sectional diameters are approximately equal.

[0031] It can be seen from the above description: On the one hand, because the open end of the liquid bag 14 is fixedly connected to the plunger 12, and the closed end of the liquid bag 14 is fixedly connected to the sleeve 11, therefore, during the reciprocating movement of the plunger 12, The plunger 12 stretches or compresses the liquid sac 14. In turn, the liquid sac 14 provides an elastic force. As the stroke of the plunger 12 from the equilibrium position in the sleeve 11 increases, the elastic force it receives also increases. , Enhance the shock absorption effect of shock absorber 1. More importantly, on the other hand, since the throttling member 13 is provided in the liquid bag 14 and the tube structure 132 of the throttling member 13 is inserted into the second chamber 122, during the reciprocating movement of the plunger 12 The number of damping holes 133 in the open state is changing at any time, and the damping force generated by the damping holes 133 is also changing accordingly, which further enhances the shock absorption effect of the shock absorber 1. In addition, since the liquid bladder 14 is provided in the first chamber 112 and one end of the liquid bladder 14 is hermetically connected to the plunger 12, during the sliding of the plunger 12 relative to the sleeve 11, the hydraulic oil 4 It only flows between the liquid bladder 14 and the second chamber 122, which avoids the problem of failure of the shock absorber 1 caused by the leakage of the hydraulic oil 4. The arrangement of the base 131 on the outer edge of the circumference to match the inner wall of the first chamber 112 also enables the base 131 to limit the horizontal position of the pipe structure 132, thereby allowing the plunger 12 and the throttle 13 to slide It is more smooth and stable, and avoids the failure of the shock absorber 1 caused by the occurrence of an offset phenomenon of the tube structure 132 of the throttle member 13 during the working process of the throttle member 13.

[0032] In other words, compared to the existing drum washing machine shock absorber that uses friction to absorb shock, the damping force generated by the shock absorber 1 of the present invention is not a constant damping force, but a variable damping that changes with the amplitude of the vibration. That is to say, the greater the vibration amplitude of the washing machine, the greater the damping force produced by the shock absorber 1 against the shock, and the shock absorber 1 of the present invention will not cause the shock absorber 1 due to wear and tear. After working for a period of time, the problem of failure occurs, thereby solving the problem of invariable damping force in the prior art, greatly enhancing the shock absorption effect of the shock absorber, and greatly improving the user experience of using the drum washing machine.

[0033] It should also be noted here that the number and diameter of the damping holes 133 are not limited in this embodiment. For different types of shock absorbers 1, the number and diameter of the damping holes 133 are not the same. For example, for a relatively small shock absorber 1, the diameter of the orifice 133 can be in the range of a few tenths of a millimeter to a few millimeters in thickness; while for a relatively large shock absorber 1, the diameter of the orifice 133 can be in the range The thickness range of a few millimeters to ten millimeters.

[0034] Those skilled in the art can also understand that the above-mentioned preferred arrangement of the damping hole 133 is only used to explain the principle of the present invention, and is not intended to limit the protection scope of the present invention. Without departing from the principle of the present invention, the art Technicians can also adjust the above setting methods in any form to adapt to more specific applications. For example, the cross section of the orifice 133 can also be elliptical or rectangular; the base 131 and the tube structure 132 can be fixedly connected by screwing; the angle between the axis of the orifice 133 and the axis of the tube structure 132 can be any angle For example, the angle between the axis of the orifice 133 and the axis of the pipe structure 132 in the horizontal to the left direction is 45°.

[0035] Combine below image 3 The working principle of the shock absorber for the drum washing machine of the present invention is briefly described.

[0036] press image 3 As shown in the orientation, when the plunger 12 is forced to slide to the left, the volume of the liquid bladder 14 becomes smaller, the opening orifice 133 on the throttle 13 is reduced, the hydraulic oil 4 is squeezed, and the inner cavity of the liquid bladder 14 is generated. Positive pressure. This pressure causes the hydraulic oil 4 to flow to the second chamber 122 through the orifice 133 in the open state. When the hydraulic oil 4 flows to the second chamber 122, it generates a rightward damping force on the plunger 12, which slows down the column. The movement of the plug 12 to the left has the effect of damping; when the plunger 12 is forced to slide to the right, the volumes of the second chamber 122 and the liquid sac 14 become larger, and the throttle member 13 is in an open state. The hole 133 increases, the hydraulic oil 4 is stretched, and the inner cavity of the liquid bladder 14 generates negative pressure. The negative pressure causes the hydraulic oil 4 to pass through the orifice 133 into the inner cavity of the liquid bladder 14, and the hydraulic oil 4 flows to the liquid bladder 14 When the inner cavity of the piston 12 generates a leftward damping force, the movement of the plunger 12 to the left is slowed down, and the shock absorption effect is achieved.

[0037] Re-reference figure 1 In another aspect of the present invention, a washing machine is provided, which includes a casing 2 and a drum 3 arranged in the casing 2. The drum 3 is supported on the casing 2 through two shock absorbers 1, preferably two Each shock absorber 1 is the shock absorber 1 for drum washing machine of the present invention described above. Of course, the number of shock absorbers 1 installed in the drum washing machine is not static. Three, four or more shock absorbers 1 can also be arranged in the drum washing machine, and at least one of these shock absorbers 1 is the above-mentioned invention. The shock absorber 1 is fine.

[0038] In addition, it should be pointed out that although the above preferred embodiments are described with a drum washing machine as an example, this is not intended to limit the scope of protection of the present invention. Those skilled in the art can expect that, in addition to drum washing machines, this The invention can also be applied to other clothes processing devices, such as pulsator washing machines, clothes dryers, shoe washing machines and other devices with the same or similar shock absorption structure.

[0039] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings. However, those skilled in the art will readily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.