Shock absorber and washing machine

Abstract

The utility model provides a shock absorber and a washing machine. The shock absorber comprises a containing cylinder, a first piston mechanism, a second piston mechanism, a first elastic piece, a second elastic piece and a piston rod. A first oil chamber and a second oil chamber which are arranged at an interval are arranged in the accommodating cylinder, and the first oil chamber and the second oil chamber are both filled with damping grease; the first piston mechanism is arranged in the first oil chamber and comprises a first piston plate and a first connecting piece which are connected; the second piston mechanism is arranged in the second oil chamber and comprises a second piston plate and a second connecting piece which are connected, the piston rod comprises a first part and a second part which are connected in sequence, the first part penetrates through the first oil chamber, and the second part is located between the first oil chamber and the second oil chamber; the two ends of the second part are provided with a first end face used for abutting against the first connecting piece and a second end face used for abutting against the second connecting piece respectively. Damping of the shock absorber is adjustable, so that the shock absorber is suitable for different working stages of the roller washing machine.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a shock absorber and a washing machine. Background Art

[0002] With the continuous development of science and technology, washing machines, as an indispensable electrical product in household appliances, are constantly innovating. The washing machines on the market can be roughly divided into: pulsator washing machines, drum washing machines, agitator washing machines, jet washing machines, spray washing machines and vibration washing machines according to their structure and washing method. Among them, drum washing machines have higher cleaning efficiency, less wear and tear on clothes, and are more water-saving, electricity-saving and detergent-saving than other washing machines, and are beginning to be more and more popular with consumers.

[0003] At present, drum washing machines generally use several shock absorbers and suspension springs to support and damp the outer drum assembly of the washing machine. At present, due to cost and manufacturing process considerations, most washing machine manufacturers use shock absorbers with constant damping force. However, the entire working stroke of a drum washing machine includes large-amplitude working conditions such as washing, rinsing, and low-speed dehydration, as well as small-amplitude working conditions such as high-speed dehydration. In order to suppress the vibration of large-amplitude working conditions, a shock absorber with a larger damping force needs to be selected. However, a larger damping force is easy to excite a larger vibration of the washing machine shell in the small-amplitude working condition (such as high-speed dehydration), and the noise of the whole machine will also increase; if a shock absorber with a smaller damping force is used, the vibration of the large-amplitude working condition cannot be suppressed, and there is a risk of displacement of the whole machine. Utility Model Content

[0004] Based on this, an embodiment of the present application provides a shock absorber and a washing machine.

[0005] In a first aspect, an embodiment of the present application provides a shock absorber, comprising:

[0006] An accommodating cylinder, wherein a first oil chamber and a second oil chamber are provided in the accommodating cylinder and are spaced apart from each other, and the first oil chamber and the second oil chamber are both filled with damping grease;

[0007] A first piston mechanism is disposed in the first oil chamber, the first piston mechanism comprises a first piston plate and a first connecting member connected to each other, the first piston plate is provided with a first oil hole, the first oil chamber has a first cavity wall disposed close to the second oil chamber, the first cavity wall is provided with a first through hole, and the first connecting member passes through the first through hole;

[0008] A first elastic member, disposed between the first piston plate and the first cavity wall and connected to the first piston plate;

[0009] A second piston mechanism is disposed in the second oil chamber, the second piston mechanism comprises a second piston plate and a second connecting member connected to each other, the second piston plate is provided with a second oil hole, the second oil chamber has a second cavity wall disposed close to the first oil chamber, the second cavity wall is provided with a second through hole, and the second connecting member passes through the second through hole;

[0010] A second elastic member, disposed between the first piston plate and the first cavity wall and connected to the first piston plate;

[0011] A piston rod, the piston rod comprising a first part and a second part connected in sequence, wherein the first part passes through the first oil chamber, the second part is located between the first oil chamber and the second oil chamber, and both ends of the second part respectively have a first end face for abutting the first connecting member and a second end face for abutting the second connecting member; when the shock absorber is in an initial state, a first interval is maintained between the first end face and the first connecting member, and a second interval is maintained between the first end face and the second connecting member.

[0012] In some embodiments, an intermediate air chamber is further provided in the accommodating cylinder, the intermediate air chamber is provided between the first oil chamber and the second oil chamber, the intermediate air chamber is filled with gas, and the second portion of the piston rod passes through the intermediate air chamber;

[0013] The shock absorber further comprises a third piston plate, which is disposed in the intermediate air chamber and connected to the second portion of the piston rod, and the third piston plate is provided with an air hole.

[0014] In some embodiments, the intermediate air chamber has a third chamber wall and a fourth chamber wall that are relatively arranged, wherein the third chamber wall is arranged close to the first oil chamber, and the fourth chamber wall is arranged close to the second oil chamber, a third through hole is provided on the third chamber wall, and a fourth through hole is provided on the fourth chamber wall, and the second part of the piston rod passes through the third through hole and the fourth through hole.

[0015] In some embodiments, the first connecting member is cylindrical, a fifth through hole is provided on the first piston plate, the hollow structure of the first connecting member is connected to the fifth through hole, and the first part of the piston rod passes through the hollow structure of the first connecting member and the fifth through hole and can slide in the hollow structure of the first connecting member and the fifth through hole;

[0016] The diameter of the second portion of the piston rod is greater than the diameter of the first portion.

[0017] In some embodiments, the piston rod further comprises a third portion, the third portion being connected to an end of the second portion facing away from the first portion, and a diameter of the second portion of the piston rod is greater than a diameter of the third portion;

[0018] The second connecting member is in a cylindrical shape, and the third portion of the piston rod can enter the hollow structure of the second connecting member and slide in the hollow structure of the second connecting member.

[0019] In some embodiments, the first elastic member is sleeved on the outer periphery of the first connecting member; and / or

[0020] The first elastic member is a spring; and / or

[0021] The second elastic member is sleeved on the outer circumference of the second connecting member; and / or

[0022] The second elastic member is a spring.

[0023] In some embodiments, the first interval and the second interval are each 1 mm to 10 mm; and / or

[0024] The first interval and the second interval are equal.

[0025] In some embodiments, the accommodating tube has a closed end and an open end that are arranged opposite to each other, and the first oil chamber, the intermediate air chamber, and the second oil chamber are arranged in sequence in the direction from the open end to the closed end;

[0026] The shock absorber comprises a first joint and a second joint, the first joint being connected to an end of the accommodating tube away from the piston rod, and the second joint being connected to an end of the piston rod away from the accommodating tube; and / or

[0027] The piston rod also includes a fourth part, which is connected to an end of the first part away from the second part. During the reciprocating motion of the piston rod, at least a part of the fourth part is located in the accommodating tube, and the ratio of the diameter of the fourth part to the inner diameter of the accommodating tube is (0.9~1):1.

[0028] In some embodiments, a sixth through hole is provided on the second piston plate, and the hollow structure of the second connecting member is connected to the sixth through hole; and / or

[0029] The first oil chamber further has a fifth cavity wall arranged opposite to the first cavity wall, a seventh through hole is arranged on the fifth cavity wall, and the first part of the piston rod passes through the seventh through hole.

[0030] In a second aspect, an embodiment of the present application provides a washing machine, comprising the shock absorber as described above.

[0031] The shock absorber provided in the embodiment of the present application is configured to maintain a first interval between the second portion of the piston rod and the first connecting member and a second interval between the second portion and the second connecting member. When the amplitude of the vibration transmitted to the shock absorber is greater than the first interval and / or the second interval, the second portion abuts against the first connecting member and / or the second connecting member during the movement of the piston rod, and drives the first piston plate and / or the second piston plate to move. Since the first oil chamber and / or the second oil chamber are filled with damping grease, the damping generated when the first piston plate and / or the second piston plate moves is relatively large; when the amplitude of the vibration transmitted to the shock absorber is less than the first interval and / or the second interval, the second portion abuts against the first connecting member and / or the second connecting member during the movement of the piston rod, and drives the first piston plate and / or the second piston plate to move. When the first interval and the second interval are spaced apart, the second part cannot contact the first connecting member and / or the second connecting member during the movement of the piston rod. Therefore, the first piston plate and / or the second piston plate do not move at this time, and the damping generated by the shock absorber is relatively small. When the shock absorber is applied to a drum washing machine, the first interval and the second interval can be set to be smaller than the larger resonance amplitude generated when the drum rotates at a low speed and larger than the smaller amplitude generated when the drum rotates at a high speed. Therefore, when the drum rotates at a low speed, the shock absorber generates a larger damping to eliminate the resonance amplitude generated by the drum. When the drum rotates at a high speed, the shock absorber generates a smaller damping, which can reduce the vibration transmission between the drum and the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments.

[0033] Figure 1 A schematic diagram of the initial state of the shock absorber provided in an embodiment of the present application.

[0034] Figure 2 for Figure 1 An enlarged schematic diagram of a portion of the area.

[0035] Figure 3 A schematic diagram of a second state of the shock absorber provided in an embodiment of the present application.

[0036] Figure 4 A schematic diagram of a third state of the shock absorber provided in an embodiment of the present application.

[0037] Component Symbols:

[0038] L1, first interval; L2, second interval; 100, shock absorber; 10, accommodating cylinder; 11, closed end; 12, open end; 20, first oil chamber; 21, first cavity wall; 211, first through hole; 25, fifth cavity wall; 257, seventh through hole; 30, second oil chamber; 32, second cavity wall; 322, second through hole; 36, sixth cavity wall; 40, first piston mechanism; 41, first piston plate; 411, first oil hole; 415, fifth through hole; 42, first connecting member; 51, first elastic member; 60, second piston mechanism; 61, second piston plate; Plug plate; 612, second oil hole; 616, sixth through hole; 62, second connecting member; 52, second elastic member; 70, piston rod; 71, first part; 72, second part; 721, first end face; 722, second end face; 73, third part; 74, fourth part; 80, intermediate air chamber; 83, third cavity wall; 833, third through hole; 84, fourth cavity wall; 844, fourth through hole; 81, third piston plate; 811, air hole; 91, first joint; 911, first connecting hole; 92, second joint; 922, second connecting hole. DETAILED DESCRIPTION

[0039] 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 described embodiments are only part of the embodiments of the present application, rather than 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 work are within the scope of protection of this application.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0044] See also Figures 1 to 4 The embodiment of the present application provides a shock absorber 100 , including a housing cylinder 10 , a first piston mechanism 40 , a second piston mechanism 60 , a piston rod 70 , a first elastic member 51 , and a second elastic member 52 .

[0045] It should be noted that Figure 2 for Figure 1 An enlarged schematic diagram of the area surrounded by the dotted line frame on the shock absorber 100, Figure 3 The figure shows the state of the shock absorber 100 when the piston rod 70 rises to the first position. Figure 4 Shown is a schematic diagram of the state of the shock absorber 100 when the piston rod 70 rises to the second position.

[0046] See also Figures 2 to 4 The accommodating cylinder 10 is provided with a first oil chamber 20 and a second oil chamber 30 which are spaced apart from each other. The first oil chamber 20 and the second oil chamber 30 are both filled with damping grease.

[0047] See also Figures 2 to 4The first piston mechanism 40 is arranged in the first oil chamber 20, and the first piston mechanism 40 includes a first piston plate 41 and a first connecting member 42 connected to each other. The first piston plate 41 is provided with a first oil hole 411. The first oil chamber 20 has a first cavity wall 21 arranged close to the second oil chamber 30, and the first cavity wall 21 is provided with a first through hole 211. The first connecting member 42 passes through the first through hole 211.

[0048] See also Figures 2 to 4 The first elastic member 51 is disposed between the first piston plate 41 and the first chamber wall 21 and is connected to the first piston plate 41 .

[0049] See also Figures 2 to 4 The second piston mechanism 60 is arranged in the second oil chamber 30, and the second piston mechanism 60 includes a second piston plate 61 and a second connecting member 62 connected to each other. The second piston plate 61 is provided with a second oil hole 612. The second oil chamber 30 has a second cavity wall 32 arranged close to the first oil chamber 20, and the second cavity wall 32 is provided with a second through hole 322. The second connecting member 62 passes through the second through hole 322.

[0050] See also Figures 2 to 4 The second elastic member 52 is disposed between the first piston plate 41 and the first chamber wall 21 and is connected to the first piston plate 41 .

[0051] See also Figures 2 to 4 The piston rod 70 includes a first part 71 and a second part 72 connected in sequence, wherein the first part 71 passes through the first oil chamber 20, the second part 72 is located between the first oil chamber 20 and the second oil chamber 30, and the two ends of the second part 72 respectively have a first end face 721 for abutting the first connecting member 42 and a second end face 722 for abutting the second connecting member 62; when the shock absorber 100 is in an initial state, a first interval L1 is maintained between the first end face 721 and the first connecting member 42, and a second interval L2 is maintained between the first end face 721 and the second connecting member 62.

[0052] See also Figures 2 to 4 An intermediate air chamber 80 is also provided in the accommodating tube 10 . The intermediate air chamber 80 is provided between the first oil chamber 20 and the second oil chamber 30 . The intermediate air chamber 80 is filled with gas. The second portion 72 of the piston rod 70 passes through the intermediate air chamber 80 .

[0053] See also Figures 2 to 4The shock absorber 100 further includes a third piston plate 81 , which is disposed in the intermediate air chamber 80 and connected to the second portion 72 of the piston rod 70 , and an air hole 811 is disposed on the third piston plate 81 .

[0054] Exemplarily, the third piston plate 81 is circular.

[0055] See also Figures 2 to 4 The intermediate air chamber 80 has a third cavity wall 83 and a fourth cavity wall 84 which are arranged opposite to each other, wherein the third cavity wall 83 is arranged close to the first oil chamber 20, and the fourth cavity wall 84 is arranged close to the second oil chamber 30, a third through hole 833 is provided on the third cavity wall 83, and a fourth through hole 844 is provided on the fourth cavity wall 84, and the second part 72 of the piston rod 70 passes through the third through hole 833 and the fourth through hole 844.

[0056] See also Figures 2 to 4 It can be seen that the third cavity wall 83, the fourth cavity wall 84 and the accommodating tube 10 together enclose the intermediate air chamber 80. Exemplarily, the third cavity wall 83 and the fourth cavity wall 84 are both circular partitions.

[0057] See also Figures 2 to 4 The process of realizing variable damping of the shock absorber 100 of the embodiment of the present application is as follows:

[0058] If the vibration amplitude of the washing machine drum (e.g., the resonance amplitude generated when the washing machine drum rotates at a low speed) is greater than the first interval L1 and the second interval L2: when the piston rod 70 moves upward until the second end surface 722 of the second portion 72 contacts the second connecting member 62 in the second piston mechanism 60 (e.g., Figure 3 As shown in FIG. 1 , at this time, the second piston mechanism 60 and the piston rod 70 are integrated, and under the upward push of the piston rod 70, the first piston plate 41 starts to move upward (as shown in FIG. 1 ). Figure 4 As shown), at this time, the second oil chamber 30 and the intermediate air chamber 80 simultaneously produce damping effects, and the damping of the shock absorber 100 is relatively large; when the piston rod 70 moves downward until the first end surface 721 of the second part 72 contacts the first connecting member 42 in the first piston mechanism 40, at this time, the first piston mechanism 40 and the piston rod 70 become one body, and under the downward push of the piston rod 70, the second piston plate 61 starts to move downward, and the first oil chamber 20 and the intermediate air chamber 80 simultaneously produce damping effects, and the damping of the shock absorber 100 is relatively large;

[0059] If the amplitude of the vibration of the washing machine drum (for example, the small amplitude generated when rotating at high speed) is smaller than the first interval L1 and the second interval L2: when the piston rod 70 moves upward, the second end surface 722 of the second portion 72 will not touch the second connecting member 62 in the second piston mechanism 60, and when the piston rod 70 moves downward, the first end surface 721 of the second portion 72 will not touch the first connecting member 42 in the first piston mechanism 40. In other words, no matter when the piston rod 70 moves upward or downward, the first piston plate 41 and the second piston plate 61 will not move. At this time, only the intermediate air chamber 80 can produce a damping effect. Since the damping of the gas is small, the damping of the shock absorber 100 is small.

[0060] It can be understood that the intermediate air chamber 80 may not be provided in the shock absorber 100 provided in the embodiment of the present application. In the case where the intermediate air chamber 80 is not provided, when the amplitude of the vibration of the washing machine drum (for example, the small amplitude generated when rotating at high speed) is smaller than the first interval L1 and the second interval L2, when the piston rod 70 moves upward or downward, the piston rod 70 moves freely, and the damping of the shock absorber 100 is almost zero; when the amplitude of the vibration of the washing machine drum (for example, the resonance amplitude generated when rotating at low speed) is larger than the first interval L1 and the second interval L2, when the piston rod 70 moves upward until the second piston plate 61 moves upward, at this time, only the second oil chamber 30 plays a damping role, and the shock absorber 100 still has a large damping; when the piston rod 70 moves downward until the first piston plate 41 moves downward, at this time, only the first oil chamber 20 plays a damping role, and the shock absorber 100 still has a large damping.

[0061] It should be noted that, by arranging the first elastic member 51 between the first piston plate 41 and the first cavity wall 21, when the piston rod 70 moves upward to the highest point, the first piston plate 41 is also at the highest upward position, and since the first elastic member 51 is connected to the first piston plate 41, the first elastic member 51 is in a stretched state (such as Figure 4 As shown), the piston rod 70 then starts to move downward, so that the first connecting member 42 is separated from the second portion 72 of the piston rod 70. At this time, under the pulling force of the first elastic member 51, the first piston plate 41 returns to its initial position.

[0062] Similarly, by setting the second elastic member 52 between the second piston plate 61 and the second chamber wall 32, when the piston rod 70 moves downward to the lowest point, the second piston plate 61 is also in the lowest downward position. Since the second elastic member 52 is connected to the second piston plate 61, the second elastic member 52 is in a stretched state. After that, the piston rod 70 starts to move upward, so that the second connecting member 62 is separated from the second part 72 of the piston rod 70. At this time, under the pulling force of the second elastic member 52, the second piston plate 61 returns to its initial position.

[0063] See also Figures 2 to 4 The first connecting member 42 is cylindrical, and a fifth through hole 415 is provided on the first piston plate 41. The hollow structure of the first connecting member 42 is connected to the fifth through hole 415. The first part 71 of the piston rod 70 passes through the hollow structure of the first connecting member 42 and the fifth through hole 415 and can slide in the hollow structure of the first connecting member 42 and the fifth through hole 415.

[0064] Exemplarily, the fifth through hole 415 is located at the center of the first piston plate 41 , and the first piston plate 41 and the fifth through hole 415 may both be circular, and they share the same center.

[0065] See also Figures 2 to 4 , the diameter of the second portion 72 of the piston rod 70 is greater than the diameter of the first portion 71 .

[0066] See also Figure 2 It can be seen that the end surface of the second portion 72 that exceeds the edge of the first portion 71 constitutes a first end surface 721 for abutting against the first connecting member 42.

[0067] See also Figures 2 to 4 The piston rod 70 further includes a third portion 73 , which is connected to an end of the second portion 72 away from the first portion 71 , and a diameter of the second portion 72 of the piston rod 70 is greater than a diameter of the third portion 73 .

[0068] Exemplarily, the diameter of the first portion 71 is equal to the diameter of the third portion 73 .

[0069] Exemplarily, the diameter of the first portion 71 and the diameter of the third portion 73 are both D1, the diameter of the second portion 72 is D2, and D1:D2=1:(1-5), for example, 1:1, 1:2, 1:3, 1:4, 1:5, etc.

[0070] See also Figures 2 to 4 The second connecting member 62 is cylindrical, and the third portion 73 of the piston rod 70 enters the hollow structure of the second connecting member 62 and can slide in the hollow structure of the second connecting member 62 .

[0071] See also Figure 2 It can be seen that the end surface of the second portion 72 that exceeds the edge of the third portion 73 constitutes a second end surface 722 for abutting against the second connecting member 62.

[0072] See also Figures 2 to 4A sixth through hole 616 is provided on the second piston plate 61 , the hollow structure of the second connecting member 62 is connected to the sixth through hole 616 , and the third portion 73 of the piston rod 70 can enter the sixth through hole 616 and slide in the sixth through hole 616 .

[0073] Exemplarily, the sixth through hole 616 is located at the center of the second piston plate 61 , and the second piston plate 61 and the sixth through hole 616 may both be circular, and they share the same center.

[0074] See also Figures 2 to 4 The first oil chamber 20 also has a fifth cavity wall 25 arranged opposite to the first cavity wall 21 , and a seventh through hole 257 is provided on the fifth cavity wall 25 , and the first part 71 of the piston rod 70 passes through the seventh through hole 257 .

[0075] See also Figures 2 to 4 It can be seen that the first cavity wall 21, the fifth cavity wall 25 and the accommodating tube 10 together enclose the first oil chamber 20. Exemplarily, the first cavity wall 21 and the fifth cavity wall 25 are both circular partitions.

[0076] See also Figures 2 to 4 The first elastic member 51 is sleeved on the outer circumference of the first connecting member 42. Exemplarily, the first elastic member 51 is a spring.

[0077] See also Figures 2 to 4 The second elastic member 52 is sleeved on the outer circumference of the second connecting member 62. Exemplarily, the second elastic member 52 is a spring.

[0078] Exemplarily, the first interval L1 and the second interval L2 are each 1 mm to 10 mm, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0079] Exemplarily, the first interval L1 and the second interval L2 are equal.

[0080] See also Figures 1 to 4 The accommodating cylinder 10 has a closed end 11 and an open end 12 that are arranged opposite to each other, and the first oil chamber 20, the intermediate air chamber 80 and the second oil chamber 30 are arranged in sequence in the direction from the open end 12 to the closed end 11.

[0081] It can be understood that the piston rod 70 enters and exits the accommodating cylinder 10 through the open end 12 .

[0082] See also Figure 1The shock absorber 100 includes a first joint 91 and a second joint 92 , wherein the first joint 91 is connected to an end of the accommodating tube 10 away from the piston rod 70 , and the second joint 92 is connected to an end of the piston rod 70 away from the accommodating tube 10 .

[0083] See also Figures 1 to 4 The piston rod 70 also includes a fourth portion 74, which is connected to an end of the first portion 71 away from the second portion 72. During the reciprocating motion of the piston rod 70, at least a portion of the fourth portion 74 is located in the accommodating tube 10, and the ratio of the diameter of the fourth portion 74 to the inner diameter of the accommodating tube 10 is (0.9-1):1, for example, 0.9:1, 0.92:1, 0.95:1, 0.98:1, 1:1, etc.

[0084] It can be understood that since the diameter of the fourth portion 74 of the piston rod 70 is substantially equal to or slightly lower than the inner diameter of the accommodating tube 10, that is, it substantially fills the inner diameter of the open end 12 of the accommodating tube 10, and since the fourth portion 74 has a larger diameter and higher mechanical strength, when the piston rod 70 reciprocates relative to the accommodating tube 10, the fourth portion 74 can support other portions of the piston rod 70 (including the first portion 71, the second portion 72, and the third portion 73), thereby enhancing the mechanical strength of the entire piston rod 70, extending the service life of the piston rod 70, and thereby extending the service life of the shock absorber 100.

[0085] Exemplarily, the cross-sections of the first portion 71 , the second portion 72 , the third portion 73 , and the fourth portion 74 of the piston rod 70 are all circular.

[0086] See also Figure 1 The second joint 92 is connected to an end of the fourth portion 74 of the piston rod 70 that faces away from the first portion 71 .

[0087] See also Figure 1 The first connector 91 is provided with a first connection hole 911, and the first connection hole 911 is used to connect to the drum of the washing machine; the second connector 92 is provided with a second connection hole 922, and the second connection hole 922 is used to connect to the body of the washing machine.

[0088] Illustratively, in the embodiment of the present application, the first through hole 211 , the second through hole 322 , the third through hole 833 , the fourth through hole 844 , the fifth through hole 415 , the sixth through hole 616 , the seventh through hole 257 , the first connecting hole 911 , and the second connecting hole 922 are all circular holes.

[0089] See also Figures 2 to 4The second oil chamber 30 also has a sixth chamber wall 36 disposed opposite to the second chamber wall 32. The second chamber wall 32, the sixth chamber wall 36 and the accommodating tube 10 together enclose the second oil chamber 30. Exemplarily, the second chamber wall 32 and the sixth chamber wall 36 are both circular partitions.

[0090] See also Figures 2 to 4 A first sealing ring is bonded to the hole wall of the first through hole 211 on the first cavity wall 21 to ensure the sealing between the piston rod 70 and the first cavity wall 21 during the sliding connection process to prevent the damping grease from leaking from the first through hole 211.

[0091] See also Figures 2 to 4 In the first piston mechanism 40, a second sealing ring is bonded to the inner wall of the first connecting member 42 and the wall of the fifth through hole 415 of the first piston plate 41 to ensure the sealing between the piston rod 70 and the first piston mechanism 40 during the sliding connection process, so as to prevent the damping grease from leaking from the hollow structure of the first connecting member 42 and the fifth through hole 415.

[0092] See also Figures 2 to 4 A third sealing ring is bonded to the hole wall of the seventh through hole 257 on the fifth cavity wall 25 to ensure the sealing between the piston rod 70 and the fifth cavity wall 25 during the sliding connection process to prevent the damping grease from leaking from the seventh through hole 257.

[0093] See also Figures 2 to 4 A fourth sealing ring is bonded to the hole wall of the third through hole 833 on the third cavity wall 83 to ensure the sealing between the piston rod 70 and the third cavity wall 83 during the sliding connection to prevent the damping grease from leaking from the third through hole 833.

[0094] See also Figures 2 to 4 A fifth sealing ring is bonded to the hole wall of the fourth through hole 844 on the fourth cavity wall 84 to ensure the sealing between the piston rod 70 and the fourth cavity wall 84 during the sliding connection to prevent the damping grease from leaking from the fourth through hole 844.

[0095] See also Figures 2 to 4 A sixth sealing ring is bonded to the hole wall of the second through hole 322 on the second cavity wall 32 to ensure the sealing between the piston rod 70 and the second cavity wall 32 during the sliding connection process to prevent the damping grease from leaking from the second through hole 322.

[0096] See also Figures 2 to 4In the second piston mechanism 60, a seventh sealing ring is bonded to the inner wall of the second connecting member 62 and the wall of the sixth through hole 616 of the second piston plate 61 to ensure the sealing between the piston rod 70 and the second piston mechanism 60 during the sliding connection process, so as to prevent the damping grease from leaking from the hollow structure of the second connecting member 62 and the sixth through hole 616.

[0097] In summary, the shock absorber 100 provided in the embodiment of the present application is configured to maintain a first interval L1 between the second portion 72 of the piston rod 70 and the first connecting member 42 and a second interval L2 between the second portion 72 and the second connecting member 62. When the amplitude of the vibration transmitted to the shock absorber 100 is greater than the first interval L1 and / or the second interval L2, the second portion 72 abuts against the first connecting member 42 and / or the second connecting member 62 during the movement of the piston rod 70, and drives the first piston plate 41 and / or the second piston plate 61 to move. Since the first oil chamber 20 and / or the second oil chamber 30 are filled with damping grease, the damping generated when the first piston plate 41 and / or the second piston plate 61 moves is relatively large; when the amplitude of the vibration transmitted to the shock absorber 100 is less than the first interval L1 and / or the second interval L2, the second portion 72 abuts against the first connecting member 42 and / or the second connecting member 62 during the movement of the piston rod 70, and drives the first piston plate 41 and / or the second piston plate 61 to move. When the first interval L1 and / or the second interval L2 are set, the second part 72 cannot contact the first connecting member 42 and / or the second connecting member 62 during the movement of the piston rod 70. Therefore, the first piston plate 41 and / or the second piston plate 61 do not move at this time, and the damping generated by the shock absorber 100 is relatively small; when the shock absorber 100 is applied to a drum washing machine, the first interval L1 and the second interval L2 can be set to be smaller than the larger resonance amplitude generated when the drum rotates at a low speed and larger than the smaller amplitude generated when the drum rotates at a high speed. Therefore, when the drum rotates at a low speed, the shock absorber 100 generates a larger damping to eliminate the resonance amplitude generated by the drum. When the drum rotates at a high speed, the shock absorber 100 generates a smaller damping, which can reduce the vibration transmission between the drum and the housing.

[0098] An embodiment of the present application further provides a washing machine, comprising the shock absorber 100 in any of the above embodiments.

[0099] Exemplarily, the washing machine further includes a drum assembly and a housing, the drum assembly and the shock absorber 100 are both disposed in the housing, and the housing and the drum assembly are respectively connected at both ends of the shock absorber 100. Exemplarily, one end of the accommodating cylinder 10 in the shock absorber 100 that is away from the piston rod 70 is connected to the drum assembly, and one end of the piston rod 70 in the shock absorber 100 that is away from the accommodating cylinder 10 is connected to the housing.

[0100] The shock absorber and washing machine provided in the embodiments of the present application are described in detail above. 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 present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A shock absorber, characterized in that: include: An accommodating cylinder, wherein a first oil chamber and a second oil chamber are provided in the accommodating cylinder and are spaced apart from each other, and the first oil chamber and the second oil chamber are both filled with damping grease; A first piston mechanism is disposed in the first oil chamber, the first piston mechanism comprises a first piston plate and a first connecting member connected to each other, the first piston plate is provided with a first oil hole, the first oil chamber has a first cavity wall disposed close to the second oil chamber, the first cavity wall is provided with a first through hole, and the first connecting member passes through the first through hole; A first elastic member, disposed between the first piston plate and the first cavity wall and connected to the first piston plate; A second piston mechanism is disposed in the second oil chamber, the second piston mechanism comprises a second piston plate and a second connecting member connected to each other, the second piston plate is provided with a second oil hole, the second oil chamber has a second cavity wall disposed close to the first oil chamber, the second cavity wall is provided with a second through hole, and the second connecting member passes through the second through hole; A second elastic member, disposed between the first piston plate and the first cavity wall and connected to the first piston plate; A piston rod, the piston rod comprising a first part and a second part connected in sequence, wherein the first part passes through the first oil chamber, the second part is located between the first oil chamber and the second oil chamber, and both ends of the second part respectively have a first end face for abutting the first connecting member and a second end face for abutting the second connecting member; when the shock absorber is in an initial state, a first interval is maintained between the first end face and the first connecting member, and a second interval is maintained between the first end face and the second connecting member.

2. The shock absorber according to claim 1, characterized in that: An intermediate air chamber is also provided in the accommodating cylinder, the intermediate air chamber is provided between the first oil chamber and the second oil chamber, the intermediate air chamber is filled with gas, and the second portion of the piston rod passes through the intermediate air chamber; The shock absorber further comprises a third piston plate, which is disposed in the intermediate air chamber and connected to the second portion of the piston rod, and the third piston plate is provided with an air hole.

3. The shock absorber according to claim 2, characterized in that: The intermediate air chamber has a third chamber wall and a fourth chamber wall that are arranged opposite to each other, wherein the third chamber wall is arranged close to the first oil chamber, and the fourth chamber wall is arranged close to the second oil chamber, a third through hole is provided on the third chamber wall, and a fourth through hole is provided on the fourth chamber wall, and the second part of the piston rod passes through the third through hole and the fourth through hole.

4. The shock absorber according to claim 1, characterized in that: The first connecting member is cylindrical, a fifth through hole is provided on the first piston plate, the hollow structure of the first connecting member is connected to the fifth through hole, and the first part of the piston rod passes through the hollow structure of the first connecting member and the fifth through hole and can slide in the hollow structure of the first connecting member and the fifth through hole; The diameter of the second portion of the piston rod is greater than the diameter of the first portion.

5. The shock absorber according to claim 1, characterized in that: The piston rod further comprises a third portion, the third portion being connected to an end of the second portion facing away from the first portion, and the diameter of the second portion of the piston rod is greater than the diameter of the third portion; The second connecting member is in a cylindrical shape, and the third portion of the piston rod can enter the hollow structure of the second connecting member and slide in the hollow structure of the second connecting member.

6. The shock absorber according to claim 1, characterized in that The first elastic member is sleeved on the outer circumference of the first connecting member; and / or The first elastic member is a spring; and / or The second elastic member is sleeved on the outer circumference of the second connecting member; and / or The second elastic member is a spring.

7. The shock absorber according to claim 1, characterized in that The first interval and the second interval are each 1 mm to 10 mm; and / or The first interval and the second interval are equal.

8. The shock absorber according to claim 1, characterized in that The accommodating cylinder has a closed end and an open end that are arranged opposite to each other, and the first oil chamber, the intermediate air chamber and the second oil chamber are arranged in sequence in the direction from the open end to the closed end; The shock absorber comprises a first joint and a second joint, the first joint being connected to an end of the accommodating tube away from the piston rod, and the second joint being connected to an end of the piston rod away from the accommodating tube; and / or The piston rod also includes a fourth part, which is connected to an end of the first part away from the second part. During the reciprocating motion of the piston rod, at least a part of the fourth part is located in the accommodating tube, and the ratio of the diameter of the fourth part to the inner diameter of the accommodating tube is (0.9~1):

1.

9. The shock absorber according to any one of claims 1 to 8, characterized in that: The second piston plate is provided with a sixth through hole, and the hollow structure of the second connecting member is connected to the sixth through hole; and / or The first oil chamber further has a fifth cavity wall arranged opposite to the first cavity wall, a seventh through hole is arranged on the fifth cavity wall, and the first part of the piston rod passes through the seventh through hole.

10. A washing machine, characterized in that: Comprising the shock absorber as claimed in any one of claims 1-9.

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