CN217869584U - Shock attenuation jib and washing machine - Google Patents

Abstract

The utility model relates to the technical field of household appliances, a shock attenuation jib and washing machine is disclosed, the shock attenuation jib includes jib and damping system. The damping system comprises a control valve, a main cylinder body, a first cylinder body, a second cylinder body and a bottom valve, and damping liquid is filled in the main cylinder body, the first cylinder body and the second cylinder body of the damping system. In the use process of the washing machine, when the outer cylinder of the washing machine vibrates, the control valve can adjust the flow of the damping liquid between the damping liquid passage and the main cylinder body according to the washing condition, so that the damping force of the damping system is adjusted, the speed of the piston driven by the suspender to move in the second cylinder body is adjusted, and the shock absorption is realized. This shock attenuation jib can adjust the damping force size according to the actual washing condition to alleviate the vibrations of washing machine under the different washing conditions, improve user's use and experience the sense.

Description

Shock attenuation jib and washing machine

Technical Field

The utility model relates to the technical field of household appliances, especially, relate to a shock attenuation jib and washing machine.

Background

In the working process of the washing machine, due to the action of unbalance loading and centrifugal force of washing articles, the phenomenon that vibration cannot be generated is avoided. At present, a damping device commonly adopted by the pulsator washing machine is a damping suspender connected with a shell of the washing machine and an outer washing barrel, and the damping suspender mostly adopts a spring damping form and is characterized by small required longitudinal space and small mass.

But the damping suspender in the spring damping mode has the following defects: 1) The damping is very small, the transmission ratio is very large during resonance, and the vibration amplitude and noise of the washing machine are large when the rotating speed of a washing mode is high; 2) The steel wire can transmit vibration at high frequency, for example, when the high speed is started in a dehydration mode, the vibration amplitude and the noise of the washing machine are larger; 3) In the presence of an eccentric load, a rocking motion is easily generated, and OOB is easily triggered.

Therefore, a shock absorbing suspension rod and a washing machine are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

Based on above problem, the utility model aims to provide a damping jib and washing machine, damping jib can adjust the damping force size to adapt to the different washing condition, thereby alleviate washing machine's vibrations, improve the user and use experience and feel.

In order to achieve the purpose, the utility model adopts the following technical proposal:

in one aspect, a shock absorbing boom is provided, comprising a boom and a damping system;

the damping system comprises a control valve, a total cylinder body, a first cylinder body and a second cylinder body, wherein the first cylinder body and the second cylinder body are arranged in the total cylinder body, a damping liquid passage is formed between the first cylinder body and the second cylinder body in a surrounding mode, one end of the damping liquid passage is communicated with an inner cavity of the second cylinder body, the other end of the damping liquid passage is communicated with the total cylinder body through the control valve, and the control valve is configured to be capable of adjusting damping liquid flow between the damping liquid passage and the total cylinder body so as to adjust damping force of the damping system.

As the utility model discloses a preferred scheme of shock attenuation jib, damping system still including set up in the bottom valve of total cylinder body bottom, the one end of second barrel with the top of total cylinder body is connected, the other end with the bottom valve is connected, the inner chamber of second barrel passes through the bottom valve with total cylinder body intercommunication, be provided with the piston in the second barrel, the one end of jib stretches into the second barrel and with piston connection, first barrel interval cover is located outside the second barrel, and with second barrel sealing connection, so that the inner wall of first barrel with enclose between the outer wall of second barrel and establish formation the damping liquid passageway.

As the utility model discloses a preferred scheme of shock attenuation jib, the shock attenuation jib still includes displacement sensor and the speed sensor who is connected with washing machine's control circuit board electricity, displacement sensor is used for detecting the displacement information of washing machine urceolus, speed sensor is used for detecting the rotational speed information of urceolus, the control valve is the solenoid valve, be provided with binding post on the solenoid valve, control circuit board passes through binding post with the solenoid valve electricity is connected, control circuit board can be based on displacement information that displacement sensor recorded the rotational speed information that speed sensor surveyed passes through the solenoid valve is adjusted damping liquid passageway with damping liquid flow between the total cylinder body.

As the utility model discloses a shock attenuation jib's preferred scheme, damping system still includes the elastic component, the elastic component is located in the second barrel and the cover is located on the jib, its one end with the top of total cylinder body is connected, the other end with the jib is connected.

As the utility model discloses a shock attenuation jib's preferred scheme, the top of total cylinder body is provided with the oil blanket, the top sealing connection of second barrel has first guide holder, first guide holder is kept away from the one end of second barrel with the oil blanket is connected, the jib activity runs through the oil blanket with first guide holder.

As the utility model discloses a shock attenuation jib's preferred scheme, be provided with the second guide holder on the jib, the second guide holder with the inner wall sliding fit and the sealing connection of second barrel, the elastic component with second guide holder fixed connection.

As the utility model discloses a shock attenuation jib's preferred scheme, damping system still includes the sealing member, the both ends of first barrel are all passed through the sealing member with the outer wall sealing connection of second barrel.

As the utility model discloses a preferred scheme of shock attenuation jib, be provided with the water conservancy diversion hole on the second barrel, the damping fluid passageway passes through the water conservancy diversion hole with second barrel intercommunication.

As the utility model discloses a preferred scheme of shock attenuation jib, damping system still includes the connecting pipe, be provided with the connecting hole on the first barrel, the one end of connecting pipe with the control valve is connected, and the other end passes through the connecting hole with damping liquid passageway intercommunication.

In another aspect, a washing machine is provided, which is characterized by comprising the damping suspender.

The utility model has the advantages that:

the utility model provides a shock attenuation jib and washing machine, it has damping liquid all to fill in damping system's total cylinder body, first barrel and the second barrel, is provided with the piston in the second barrel, the one end of jib stretch into the second barrel and with piston connection, the bottom of total cylinder body is provided with the bottom valve, the inner chamber of second barrel passes through bottom valve and total cylinder body intercommunication. When the outer cylinder of the washing machine vibrates in the using process of the washing machine, the control valve can adjust the flow of damping liquid between the damping liquid passage and the main cylinder body according to the washing condition, so that the damping force of the damping system is adjusted, the speed of the piston driven by the suspender to move in the second cylinder body is further adjusted, and the shock absorption is realized. Specifically, when the outer cylinder vibrates greatly, the control valve can reduce the flow of the damping liquid between the damping liquid passage and the main cylinder body, at the moment, only a small part of the damping liquid in the second cylinder body enters the main cylinder body through the damping liquid passage and the control valve, the rest large amount of the damping liquid can only enter the main cylinder body through the bottom valve, the damping force of the damping system is increased, and therefore the vibration of the outer cylinder can be reduced. On the contrary, when the flow of the damping fluid between the damping fluid passage and the main cylinder body is increased, most of the damping fluid in the second cylinder body enters the main cylinder body through the damping fluid passage and the control valve, and only a small part of the damping fluid enters the main cylinder body through the bottom valve, so that the damping force of the damping system is reduced, and the vibration of the outer cylinder under the condition is reduced. This shock attenuation jib can adjust the damping force size according to the actual washing condition to alleviate the vibrations of washing machine under the different washing condition, improve user's use and experience and feel.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

Fig. 1 is a schematic structural view of a shock-absorbing suspension rod according to an embodiment of the present invention;

FIG. 2 is a partial view of FIG. 1;

fig. 3 is a schematic view of a shock absorbing suspension rod installed on a washing machine according to an embodiment of the present invention.

In the figure:

1-a suspender; 2-a damping system; 3-a displacement sensor; 4-a rotational speed sensor;

11-a second guide seat;

21-a control valve; 22-general cylinder body; 23-a first cylinder; 24-a second cylinder; 25-a bottom valve; 26-an elastic member;

27-a damping fluid passage; 28-connecting pipe; 29-a seal;

211-a connection terminal; 221-oil sealing;

241-a piston; 242 — a first guide seat; 243-flow guiding holes; 244-a first chamber; 245-a second chamber;

100-outer cylinder; 200-an inner cylinder; 300-motor.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, the present embodiment provides a shock-absorbing suspension rod, which can be applied to a pulsator washing machine, and includes a suspension rod 1 and a damping system 2.

The damping system 2 comprises a control valve 21, a main cylinder 22, and a first cylinder 23 and a second cylinder 24 which are arranged in the main cylinder 22, a damping fluid passage 27 is formed between the first cylinder 23 and the second cylinder 24 in an enclosing manner, one end of the damping fluid passage 27 is communicated with an inner cavity of the second cylinder 24, the other end of the damping fluid passage 27 is communicated with the main cylinder 22 through the control valve 21, and the control valve 21 is configured to be capable of adjusting the flow rate of the damping fluid between the damping fluid passage 27 and the main cylinder 22 so as to adjust the damping force of the damping system 2.

Alternatively, referring to fig. 1 and 2, the damping system 2 further includes a bottom valve 25, the bottom valve 25 being disposed at the bottom of the main cylinder 22. One end of the second cylinder 24 is connected with the top of the main cylinder 22, the other end is connected with the bottom valve 25, and the inner cavity of the second cylinder 24 is communicated with the main cylinder 22 through the bottom valve 25. A piston 241 is arranged in the second cylinder 24, and one end of the suspension rod 1 extends into the second cylinder 24 and is connected with the piston 241. The first cylinder 23 is sleeved outside the second cylinder 24 at intervals and is connected with the second cylinder 24 in a sealing manner, so that a damping fluid passage 27 is formed between the inner wall of the first cylinder 23 and the outer wall of the second cylinder 24. That is, the damping fluid in the second cylinder 26 may be introduced into the master cylinder 22 through the foot valve 25, or may be introduced into the master cylinder 22 through the damping fluid passage 27 and the control valve 21. The flow rate of the damping fluid between the damping fluid passage 27 and the main cylinder 22 can be adjusted by adjusting the size of the internal passage of the control valve 21, thereby adjusting the damping force of the damping system 2.

In the shock absorbing boom provided in this embodiment, the total cylinder 22, the first cylinder 23, and the second cylinder 24 of the damping system 2 are filled with damping fluid. When the washing machine outer cylinder 100 vibrates during use of the washing machine, the control valve 21 can adjust the flow rate of the damping fluid between the damping fluid passage 27 and the main cylinder 22 according to washing conditions, so as to adjust the damping force of the damping system 2, and further adjust the speed at which the boom 1 drives the piston 241 to move in the second cylinder 24, thereby achieving shock absorption. Specifically, when the outer cylinder 100 vibrates greatly, the control valve 21 can reduce the flow rate of the damping fluid between the damping fluid passage 27 and the main cylinder 22, at this time, only a small part of the damping fluid in the second cylinder 24 enters the main cylinder 22 through the damping fluid passage 27 and the control valve 21, the rest of the damping fluid can enter the main cylinder 22 only through the bottom valve 25, the damping force of the damping system 2 is increased, and thus the vibration of the outer cylinder 100 can be reduced. On the contrary, when the flow rate of the damping fluid between the damping fluid passage 27 and the main cylinder 22 increases, most of the damping fluid in the second cylinder 24 enters the main cylinder 22 through the damping fluid passage 27 and the control valve 21, and only a small amount of the damping fluid enters the main cylinder 22 through the bottom valve 25, so that the damping force of the damping system 2 becomes small to reduce the vibration of the outer cylinder 100 in this case. This shock attenuation jib can adjust the damping force size according to the actual washing condition to alleviate the vibrations of washing machine under the different washing condition, improve user's use and experience and feel.

Optionally, referring to fig. 3, the damping boom further includes a displacement sensor 3 and a rotation speed sensor 4 electrically connected to a control circuit board of the washing machine, the displacement sensor 3 is configured to detect displacement information of the outer tub 100 of the washing machine, the rotation speed sensor 4 is configured to detect rotation speed information of the outer tub 100, the control valve 21 is an electromagnetic valve, a connection terminal 211 is disposed on the electromagnetic valve, the control circuit board is electrically connected to the electromagnetic valve through the connection terminal 211, and the control circuit board can adjust a flow rate of the damping fluid between the damping fluid passage 27 and the main cylinder 22 through the electromagnetic valve according to the displacement information measured by the displacement sensor 3 and the rotation speed information measured by the rotation speed sensor 4. In this embodiment, the damping suspension rods are provided with a plurality of damping suspension rods, and a plurality of damping suspension rods are distributed along the circumferential direction of the outer cylinder 100 at intervals, correspondingly, the displacement sensors 3 are also provided with a plurality of damping suspension rods 1, and the plurality of displacement sensors 3 are in one-to-one correspondence with the plurality of damping suspension rods 1, so that the control circuit board adjusts the damping force of the damping system 2 of the corresponding damping suspension rods according to the displacement information measured by each displacement sensor 3. The rotation speed sensor 4 is provided at an output end of the washing machine motor 300 to measure rotation speed information of the motor 300, i.e., rotation speed information of the tub 100.

In this embodiment, the displacement information measured by the displacement sensor 3 is a height difference of the outer tub 100 in a descending state when the outer tub 100 is loaded relative to a no-load state, and when the water level in the outer tub 100 is different, the load is different, and the height of the outer tub 100 in the descending state is also different. The control circuit board can adjust the damping force of the damping system 2 through the control valve 21 according to the displacement information of the outer drum 100 measured by the displacement sensor 3 during washing so as to reduce the vibration of the outer drum 100 under different load conditions. When the washing machine performs a washing or dewatering procedure, the control circuit board can also adjust the damping force of the damping system 2 through the control valve 21 according to the rotating speed information measured by the rotating speed sensor 4, so that the vibration of the washing machine under different rotating speed conditions is reduced, and the probability of triggering OOB (out of band) is reduced.

The working principle of the electromagnetic valve is as follows: when the solenoid valve is energized, the solenoid valve generates an electromagnetic force, and when the current increases, the passage inside the solenoid valve decreases, the flow rate of the damping fluid between the damping fluid passage 27 and the main cylinder 22 decreases, and the damping force of the damping system 2 increases. Conversely, when the current is decreased, the passage inside the solenoid valve is increased, the flow rate of the damping fluid between the damping fluid passage 27 and the total cylinder 22 is increased, and the damping force of the damping system 2 is decreased. When the electromagnetic valve is powered off, although no electromagnetic force exists, the other flow path structure in the electromagnetic valve can form a damping force in a safety protection mode.

Optionally, the damping system 2 further includes an information conversion module, which is capable of converting the displacement information measured by the displacement sensor 3 and the rotation speed information measured by the rotation speed sensor 4 into current information, so that the control circuit board adjusts the current of the solenoid valve according to the corresponding current information, and the solenoid valve adjusts the flow of the damping fluid between the damping fluid passage 27 and the main cylinder 22 according to the current. For example, when the water amount in the tub 100 of the washing machine is large and the load is large, the displacement of the tub 100 to descend is also large, and theoretically the amplitude of the vibration of the tub 100 is also larger, and at this time, the current received by the solenoid valve becomes larger, so that the damping force of the damping boom becomes larger to overcome the vibration. Similarly, when the rotation speed of the washing machine increases during the dehydration process, the vibration amplitude of the outer tub 100 becomes larger theoretically, and the current received by the solenoid valve becomes larger, so that the damping force of the damping suspension rod becomes larger to overcome the vibration.

Optionally, referring to fig. 1 and 2, the damping system 2 further includes an elastic member 26, the elastic member 26 is located in the second cylinder 24 and sleeved on the suspension rod 1, and one end of the elastic member 26 is connected to the top of the main cylinder 22 and the other end is connected to the suspension rod 1. When the suspension rod 1 moves relative to the second cylinder 24, the elastic member 26 elastically deforms to absorb the speed of the movement of the suspension rod 1 relative to the second cylinder 24, thereby reducing the vibration of the outer cylinder 100. The variation of the damping force of the damping system 2 allows to adjust the speed of the elastic deformation of the elastic member 26, thereby reducing the vibrations generated by the washing machine under different washing conditions. Preferably, the elastic member 26 is a spring.

With continued reference to fig. 1 and 2, optionally, a first guide seat 242 is sealingly connected to the top of the second cylinder 24, an end of the first guide seat 242 remote from the second cylinder 24 is connected to the top of the main cylinder 22, and the suspension rod 1 is movably inserted through the first guide seat 242. The first guide seat 242 seals the top of the second cylinder 24, so that a closed cavity is formed in the second cylinder 24, the damping fluid in the second cylinder 24 is prevented from leaking from the top, and meanwhile, the first guide seat 242 can provide a guide limiting effect for the guide rod to move up and down. Furthermore, the suspension rod 1 is in sliding contact with the first guide seat 242 in a sealing manner, and an O-ring may be disposed on the suspension rod 1 to prevent the damping fluid in the second cylinder 24 from leaking while ensuring that the suspension rod 1 can move up and down.

Optionally, referring to fig. 2, an oil seal 221 is disposed at the top of the main cylinder 22, the oil seal 221 is interposed between the first guide seat 242 and the top of the main cylinder 22, and the boom 1 movably penetrates through the oil seal 221. The first oil seal 221 can seal the top of the main cylinder 22 to form a sealed cavity inside the main cylinder 22, thereby preventing the damping fluid in the main cylinder 22 from leaking. Furthermore, the boom 1 is in sliding sealing contact with the oil seal 221, so that the damping fluid in the main cylinder 22 is prevented from leaking during the vertical movement of the boom 1.

Optionally, referring to fig. 2, the suspension rod 1 is provided with a second guide seat 11, the second guide seat 11 is slidably fitted and hermetically connected with an inner wall of the second cylinder 24, and the elastic element 26 is fixedly connected with the second guide seat 11. The second guide seat 11 can provide a fixed position for the elastic element 26, so that the elastic element 26 extends and retracts along with the movement of the boom 1, the vibration generated by the outer cylinder 100 is buffered, meanwhile, the second guide seat 11 can further guide and limit the movement of the boom 1, and the boom 1 is ensured to move along the axis direction of the second cylinder 24 all the time. Further, the second guide holder 11 is in sealed sliding contact with the inner wall of the second cylinder 24, and the damping fluid in the second cylinder 24 can be further prevented from leaking.

Alternatively, referring to fig. 2, the second cylinder 24 is provided with a guide hole 243, and the damping fluid passage 27 communicates with the second cylinder 24 through the guide hole 243. In this embodiment, the piston 241 divides the inner cavity of the second cylinder 24 into a first chamber 244 and a second chamber 245, the first chamber 244 and the second chamber 245 can be communicated through a hole on the piston 241, the diversion hole 243 is located in the first chamber 244, and the damping fluid in the first chamber 244 can flow into the damping fluid passage 27 through the diversion hole 243.

Alternatively, referring to fig. 2, the damping system 2 further includes a connection pipe 28, and the first cylinder 23 is provided with a connection hole (not shown), and one end of the connection pipe 28 is connected to the control valve 21, and the other end thereof is communicated with the damping fluid passage 27 through the connection hole. The casing of the control valve 21 is fixedly connected to the outer wall of the main cylinder 22, and a rubber layer (which can be fixed to the connecting pipe 28 through a vulcanization process) is arranged on the outer wall of the connecting pipe 28, so that the connecting pipe 28 and the connecting hole are hermetically connected through the rubber layer, and the damping fluid is prevented from leaking.

Optionally, referring to fig. 2, the damping system 2 further includes a sealing member 29, and both ends of the first cylinder 23 are sealingly connected with the outer wall of the second cylinder 24 through the sealing member 29, so that a damping fluid passage 27 is defined between the first cylinder 23 and the second cylinder 24. Damping fluid in the first chamber 244 may enter the damping fluid passage 27 via the pilot holes 243, and then enter the master cylinder 22 through a passage inside the solenoid valve. The seal 29 is preferably an O-ring seal.

The embodiment also provides a washing machine, which comprises the damping suspender. The washing machine adopting the damping suspender can adjust the damping force according to different washing conditions in the use process, so as to adapt to and reduce the vibration generated by the washing machine under different washing conditions, and effectively improve the use experience of a user.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A shock absorbing boom, characterized by comprising a boom (1) and a damping system (2);

damping system (2) include control valve (21), total cylinder body (22) and set up in first barrel (23) and second barrel (24) in total cylinder body (22), first barrel (23) with enclose between second barrel (24) and establish and form damping liquid passageway (27), the one end of damping liquid passageway (27) with the inner chamber intercommunication of second barrel (24), the other end passes through control valve (21) with total cylinder body (22) intercommunication, control valve (21) are configured as can adjust damping liquid passageway (27) with damping liquid flow between total cylinder body (22) is in order to adjust the damping force of damping system (2).

2. The shock absorbing boom according to claim 1, wherein said damping system (2) further comprises a bottom valve (25) disposed at the bottom of said main cylinder (22), one end of said second cylinder (24) is connected to the top of said main cylinder (22), the other end is connected to said bottom valve (25), the inner cavity of said second cylinder (24) is connected to said main cylinder (22) through said bottom valve (25), a piston (241) is disposed in said second cylinder (24), one end of said boom (1) extends into said second cylinder (24) and is connected to said piston (241), said first cylinder (23) is disposed outside said second cylinder (24) at an interval and is connected to said second cylinder (24) in a sealing manner, so that said damping fluid passage (27) is defined between the inner wall of said first cylinder (23) and the outer wall of said second cylinder (24).

3. The shock absorption suspension rod according to claim 1, further comprising a displacement sensor (3) and a rotation speed sensor (4) electrically connected to a control circuit board of a washing machine, wherein the displacement sensor (3) is used for detecting displacement information of the outer tub (100) of the washing machine, the rotation speed sensor (4) is used for detecting rotation speed information of the outer tub (100), the control valve (21) is an electromagnetic valve, a connection terminal (211) is disposed on the electromagnetic valve, the control circuit board is electrically connected to the electromagnetic valve through the connection terminal (211), and the control circuit board can adjust the flow rate of the damping fluid between the damping fluid passage (27) and the main cylinder (22) through the electromagnetic valve according to the displacement information detected by the displacement sensor (3) and the rotation speed information detected by the rotation speed sensor (4).

4. A shock absorbing boom according to claim 1, wherein said damping system (2) further comprises an elastic member (26), said elastic member (26) being located inside said second cylinder (24) and sleeved on said boom (1), one end of which is connected to the top of said main cylinder (22) and the other end of which is connected to said boom (1).

5. A shock absorbing boom according to claim 4, characterized in that the top of the general cylinder (22) is provided with an oil seal (221), the top of the second cylinder (24) is connected with a first guide seat (242) in a sealing way, one end of the first guide seat (242) far away from the second cylinder (24) is connected with the oil seal (221), and the boom (1) is movably penetrated through the oil seal (221) and the first guide seat (242).

6. A shock absorbing boom according to claim 4, characterized in that said boom (1) is provided with a second guide seat (11), said second guide seat (11) is slidably fitted and sealingly connected with the inner wall of said second cylinder (24), and said elastic member (26) is fixedly connected with said second guide seat (11).

7. A shock absorbing boom according to claim 2, characterized in that the damping system (2) further comprises a seal (29), both ends of the first cylinder (23) being sealingly connected with the outer wall of the second cylinder (24) by means of the seal (29).

8. A shock absorbing boom according to any one of claims 1-7, wherein a deflector hole (243) is provided in said second cylinder (24), and said damping fluid passage (27) communicates with said second cylinder (24) through said deflector hole (243).

9. A shock absorbing boom according to any one of claims 1-7, characterized in that said damping system (2) further comprises a connecting pipe (28), said first cylinder (23) being provided with a connecting hole, one end of said connecting pipe (28) being connected to said control valve (21) and the other end being in communication with said damping fluid passage (27) through said connecting hole.

10. A washing machine comprising a shock absorbing boom as claimed in any one of claims 1 to 9.

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