Damper for cleaning machine and cleaning machine

Abstract

The utility model relates to a damper for a cleaning machine and the cleaning machine, and the damper comprises a shell which is used for being connected with a door body of the cleaning machine and is provided with a hollow inner cavity; the piston is arranged in the inner cavity in a mode of moving up and down in a reciprocating mode along the inner cavity and divides the inner cavity into an upper cavity body and a lower cavity body which are relatively independent, the upper cavity body and the lower cavity body are filled with liquid, and the piston is provided with an overflowing channel for the liquid to penetrate through and a pressure relief hole; the base plate is close to the lower surface of the piston; the piston rod is used for being connected with a box body of the cleaning machine, the first end of the piston rod penetrates through the lower end of the shell, extends into the shell, is connected with the piston and moves synchronously with the piston, and the second end of the piston rod is located below the shell; the first sealing piece is arranged in the lower cavity and is close to the lower end of the shell; the elastic sealing structure is arranged between the piston and the piston rod and keeps moving towards the piston so as to close the lower end of the pressure relief hole; and the first elastic piece is arranged in the upper cavity, so that the piston always keeps the trend of moving downwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to a dish washer technical field, specifically point to a kind of damper for cleaning machine and cleaning machine. BACKGROUND

[0002] The sink type dish washer adopts the upturning door body, in order to be convenient for being used to overturn door body, damper is usually set in the connecting place of door body and the open top of sink.

[0003] For example, the prior patent ZL 202322722962.5 of the applicant 《Damping hinge mechanism, door box equipment and sink type dish washer》Disclosed a damping structure between door body and sink, its damping hinge mechanism includes: hinge base, including installation base frame and the sliding shaft arranged in installation base frame;Hinge support, including the sliding connection of sliding shaft and the sliding connection of sliding interface and the hinge of sliding interface;Pivot link, one end of pivot link is rotatably connected to installation base frame, the other end of pivot link is rotatably connected to the hinge of hinge support;Damper, one end of damper is connected to the hinge of hinge support, the other end of damper is connected to sliding shaft;When hinge support rotates relative to installation base frame to make hinge approach or away from installation base frame, sliding shaft slides relative to the sliding interface of hinge support to approach or away from hinge, so that damper is compressed or relaxed.

[0004] The above structure mainly solves the problems of existing hinge assembly and damper, such as difficult installation, poor cooperation. However, in the moment when the door body is opened, if the opening speed is too fast, the damper may not adapt to the sudden and fast pressing force of the user, and the damper is easily damaged, thereby affecting normal use. UTILITY MODEL CONTENTS

[0005] The first technical problem to be solved by the utility model is to provide a damper that can adapt to the damping process of slow opening of the door body and meet the damping process of fast opening of the door body according to the status of the prior art.

[0006] The second technical problem to be solved by the utility model is to provide a cleaning machine applying the above damper according to the status of the prior art.

[0007] The technical solution adopted by the utility model to solve at least one of the above technical problems is as follows:

[0008] A damper for a cleaning machine, comprising:

[0009] A housing for connecting with the door body of the cleaning machine has a hollow inner cavity.

[0010] A piston is arranged in the inner cavity and reciprocally moves up and down to divide the inner cavity into an upper cavity and a lower cavity, both of which are filled with liquid, and the piston is provided with a through-flow channel and a pressure relief hole for the liquid to pass through;

[0011] A pad is arranged close to the lower surface of the piston;

[0012] A piston rod is arranged to connect with the tank of the cleaning machine, the first end of the piston rod extends into the outer shell through the lower end of the outer shell and is connected with the piston to move synchronously, and the second end of the piston rod is located below the outer shell;

[0013] A first sealing member is arranged in the lower cavity and close to the lower end of the outer shell;

[0014] An elastic sealing structure is arranged between the piston and the piston rod to keep the tendency of moving towards the piston to close the lower end of the pressure relief hole; and

[0015] A first elastic member is arranged in the upper cavity to keep the piston always moving downwards.

[0016] Preferably, the piston comprises a first section, a second section and a third section arranged in sequence in the up-down direction, the outer peripheral wall of the first section is close to or in contact with the inner wall of the outer shell, the first section is provided with an axial through opening, the diameter of the second section is smaller than that of the first section, the third section is in the shape of a tapered table with a large upper end and a small lower end, the through-flow channel is arranged on the third section, and a sealing ring is arranged on the outer periphery of the second section and can reciprocally move in the axial direction of the second section and is in contact with the inner wall of the outer shell, which blocks part of the through-flow channel when close to the upper surface of the third section. The above structure can provide overpressure protection when a large force is applied to the damper at the moment of opening the door, thereby adapting to the rapid opening process.

[0017] Preferably, the third section is provided with an inner flow channel and a side flow channel, the inner flow channel and the side flow channel together constitute the through-flow channel, and the sealing ring blocks the upper end of the side flow channel when close to the upper surface of the third section. The above structure can provide overpressure protection when a large force is applied to the damper at the moment of opening the door, thereby adapting to the rapid opening process.

[0018] Preferably, the lower surface of the third section is provided with a guide flow channel which circumferentially passes through more than 180 degrees from the lower port of the inner flow channel and is connected with the lower end of a side flow channel. This structure can control the pressure by delaying the flow rate and flow volume in the only through-flow channel in the overpressure protection state, thereby protecting the internal devices of the damper from being damaged.

[0019] Preferably, the pressure relief hole is arranged in the central part of the piston and extends axially through the piston, and the elastic sealing structure is arranged between the upper end of the piston rod and the lower end of the piston and used to open and close the pressure relief hole. Preferably, the piston rod is internally hollowed at the upper end to form a pressure relief cavity, the side of the pressure relief cavity is provided with a flow hole communicating with the lower cavity, the upper end of the piston rod is provided with a plug matching the pressure relief hole of the piston, and the elastic sealing structure is arranged in the pressure relief cavity and used to control the opening and closing of the lower end of the plug matching. With the above structure, the damper can be provided with overpressure protection when the damper is subjected to a large force.

[0020] As a preferred solution, the elastic sealing structure comprises a spring ball and a third elastic member, the spring ball is arranged corresponding to the lower end of the plug matching, and the third elastic member is arranged below the spring ball and always keeps the spring ball moving upward to close the lower end of the plug matching.

[0021] As another preferred solution, the elastic sealing structure comprises an elastic ring and an elastic plug, the elastic ring is constrained at the inner top wall of the pressure relief cavity, and the elastic plug is connected to the elastic ring through an elastic arm and arranged corresponding to the lower end of the plug matching, and always keeps the elastic plug moving upward to close the lower end of the plug matching.

[0022] Preferably, the shell is provided with an open lower end, the open lower end is provided with a cover capable of closing the open lower end, the inner cavity is provided with a second sealing member arranged close to the cover, and the piston rod passes through the cover and the second sealing member. The lower surface of the first sealing gasket is provided with a guide plate, and the guide plate is provided with a second elastic member between the second sealing member and the second sealing gasket, which always keeps the second sealing gasket close to the cover. The open lower end facilitates the assembly of components into the shell, and the above structure is conducive to improving the sealing performance of the open lower end of the shell and preventing the liquid in the inner cavity from leaking.

[0023] A cleaning machine comprises a box body and a door body, the box body is provided with an open top, the edge of the door body is rotatably connected to the open top and used to open or close the open top, and the damper is embedded in an installation sleeve extending upward and downward. The box body is provided with a transversely arranged connecting shaft at the open top, the lower end of the installation sleeve is rotatably connected to the connecting shaft, the upper end of the installation sleeve extends into the door body and is rotatably connected to the door body, and the lower end of the piston rod of the damper abuts against the connecting shaft.

[0024] Preferably, the lower end of the installation sleeve is provided with a mounting hole corresponding to the connecting shaft, the mounting hole extends upward to form an elongated hole capable of allowing the connecting shaft to slide along the installation sleeve upward and downward with the expansion and contraction of the damper, the door body is rotatably and slidably constrained on the connecting shaft through the installation sleeve, and the damper, the connecting shaft and the elongated hole jointly form an adaptive structure capable of adjusting the damping degree according to the change of the weight of the door body. The above structure facilitates the realization of the self-adaptation of the damper in the initial opening state.

[0025] Preferably, the top of the box is provided with an opening upward U-shaped mounting seat, the connecting shaft is arranged in the mounting seat, the side wall of the mounting seat is further rotationally connected with a connecting arm, the upper end of the connecting arm is rotationally connected with the side wall of the mounting sleeve above it, and the upper end of the mounting sleeve is rotationally connected with the door body through a mounting shaft arranged in parallel with the connecting shaft. The above structure facilitates compact and stable installation of the damper, the door body and the connecting shaft. Compared with the prior art, the damper of the utility model changes the force applied by the door body on the damper during the opening process, and the damper is self-adapting to the door body gravity through stretching and contracting, so that stable control of the door body damping is realized. During slow opening or rapid opening of the door body, especially during the rapid opening process, the force applied by the user on the door body suddenly increases, the damper is rapidly self-adapting through the cooperation of the stretching and contracting structure, the flow passage and the pressure relief hole in the damper, so as to protect the damper and meet the needs of the user for rapid opening of the door. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structural schematic view of the embodiment 1 of the utility model;

[0027] Figure 2 It is a partial sectional view of Figure 1

[0028] Figure 3 It is a structural schematic view of the piston in the embodiment 1 of the utility model;

[0029] Figure 4 It is another angle view; Figure 3

[0030] Figure 5 It is a sectional view of the damping member in the embodiment 1 of the utility model;

[0031] Figure 6 It is a cooperation view of the damping member, the mounting sleeve and the connecting shaft of the utility model;

[0032] Figure 7 It is a sectional view of the elastic sealing structure part in the embodiment 2 of the utility model. DETAILED DESCRIPTION

[0033] The utility model will be further described in detail in combination with the embodiment of the drawings.

[0034] Embodiment 1:

[0035] As shown in the drawings, the damper 3 for the cleaning machine of the embodiment comprises: Figures 1 to 6

[0036] The shell 31 is used for being connected with the door body 2 of the cleaning machine and has a hollow inner cavity; ​​​

[0037] A piston 32 is arranged in the inner cavity and reciprocates up and down to divide the inner cavity into an upper cavity 311 and a lower cavity 312, both of which are filled with liquid, and the piston 32 is provided with a flow passage and a relief hole 324 for the liquid to pass through;

[0038] A pad 36 is arranged close to the lower surface of the piston 32;

[0039] A piston rod 33 is used to connect with the tank 1 of the cleaning machine, the first end of the piston rod 33 extends into the outer shell 31 through the lower end of the outer shell 31 and is connected with the piston 32 to move synchronously, and the second end of the piston rod 33 is located below the outer shell 31;

[0040] A first seal 10 is arranged in the lower cavity 312 close to the lower end of the outer shell 31;

[0041] An elastic sealing structure 100 is arranged between the piston 32 and the piston rod 33 to keep the tendency of moving towards the piston 32 to close the lower end of the relief hole 324; and

[0042] A first elastic member 01 is arranged in the upper cavity 311 to keep the piston 32 always moving downward.

[0043] The piston 32 comprises a first section 321, a second section 322 and a third section 323 arranged in sequence in the up-down direction, the outer peripheral wall of the first section 321 is close to or in contact with the inner wall of the outer shell 31, the first section 321 is provided with an axial through opening 320, the diameter of the second section 322 is smaller than that of the first section 321, the third section 323 is in the shape of a tapered table with a large upper end and a small lower end, the flow passage is provided on the third section 323, and the second section 322 is provided with a sealing ring 35 which can reciprocate axially along the second section 322 and is in contact with the inner wall of the outer shell 31, and the sealing ring 35 blocks part of the flow passage when close to the upper surface of the third section 323. The above structure can provide overpressure protection in the case that a large force is applied to the damper at the moment of opening the door, thereby adapting to the rapid opening process.

[0044] The third section 323 is provided with an axial through inner flow passage 325, and the outer peripheral wall of the third section 323 is provided with an axial through side flow passage 326, and the inner flow passage 325 and the side flow passage 326 jointly constitute the flow passage, and the sealing ring 35 blocks the upper end of the side flow passage 326 when close to the upper surface of the third section 323. The above structure can provide overpressure protection in the case that a large force is applied to the damper at the moment of opening the door, thereby adapting to the rapid opening process.

[0045] The lower surface of the third section 323 is provided with a flow guide channel 327 which is connected to the lower end of the one side flow channel 326 in a circumferential direction and bypasses the lower end of the inner flow channel 325 by more than 180 degrees. In the overpressure protection state, the flow guide channel 327 can delay the flow rate and flow volume in the only flow channel to control the pressure and protect the internal devices of the damper from being damaged.

[0046] The pressure relief hole 324 is arranged in the central part of the piston 32 and penetrates the piston 32 in the axial direction. The elastic sealing structure 100 is arranged between the upper end of the piston rod 33 and the lower end of the piston 32 to open and close the pressure relief hole 324. The piston rod 33 is hollow in the inner part near the upper end to form a pressure relief cavity 331. The side part of the pressure relief cavity 331 is provided with a flow hole 332 which is connected to the lower cavity 312. The upper end of the piston rod 33 is provided with a plug 333 which can be inserted into the pressure relief hole 324 of the piston 32. The elastic sealing structure 100 is arranged in the pressure relief cavity 331 and is used to control the opening and closing of the lower end of the plug. The above structure can provide overpressure protection for the damper when the damper is subjected to a large force.

[0047] The elastic sealing structure 100 of the embodiment includes a ball 101 and a third elastic member 103. The ball 101 is arranged at the lower end of the plug 333. The third elastic member 103 is arranged below the ball 101 and always keeps the ball 101 moving upward to close the lower end of the plug.

[0048] The housing 31 is provided with an open lower end. The open lower end is provided with a cover 37 which can close the open lower end. The inner cavity is provided with a second sealing member 20 which is arranged close to the cover 37. The piston rod 33 penetrates the cover 37 and the second sealing member 20. The lower surface of the first sealing member 10 is provided with a guide plate 39. The guide plate 39 and the second sealing member 20 are provided with a second elastic member 02 which can always keep the second sealing member 20 close to the cover. The open lower end is convenient for assembling the components into the housing 31. The above structure is beneficial to improve the sealing performance of the open lower end of the housing 31 and avoid the leakage of the liquid in the inner cavity.

[0049] The cleaning machine of the embodiment includes a box body 1 and a door body 2. The box body 1 has an open top. The edge of the door body 2 is rotatably connected to the open top and is used to open or close the open top. The damper 3 is embedded in an installation sleeve 4 which extends upward and downward. The box body 1 is provided with a connecting shaft 12 which is arranged transversely at the open top. The lower end of the installation sleeve 4 is rotatably connected to the connecting shaft 12. The upper end of the installation sleeve 4 extends into the door body 2 and is rotatably connected to the door body 2. The lower end of the piston rod 33 of the damper abuts against the connecting shaft 12.

[0050] The lower end of the mounting sleeve 4 is provided with a mounting hole corresponding to the connecting shaft 12, which extends upward to form a long hole for the connecting shaft 12 to slide up and down along the mounting sleeve 4 with the expansion and contraction of the damper, and the door body 2 is rotatably and slidably constrained on the connecting shaft 12 through the mounting sleeve 4, and the damper, the connecting shaft 12 and the long hole form a self-adaptive structure for adjusting the damping force according to the change of the gravity of the door body 2. The above structure facilitates the self-adaptation of the damper in the initial opening state.

[0051] The top of the box body 1 is provided with a U-shaped mounting seat 13 with an opening facing upward, the connecting shaft 12 is arranged in the mounting seat 13, and the side wall of the mounting seat 13 is further rotatably connected with a connecting arm 14, the upper end of the connecting arm 14 is rotatably connected with the side wall of the mounting sleeve 4 above it, and the upper end of the mounting sleeve 4 is rotatably connected with the door body 2 through a mounting shaft arranged in parallel with the connecting shaft 12. The above structure facilitates the compact and stable installation of the damper 3, the door body 2 and the connecting shaft 12.

[0052] When the door is opened, when the piston rod 33 is pressed by a quick force, the piston rod 33 quickly drives the piston 32 to move inward, quickly extruding the oil in the upper cavity 311 to move to the lower cavity 312, because the extrusion force is large, the sealing ring 35 abuts against the upper surface of the third section 323 of the piston 32, blocks the side flow channel 326, and part of the oil still enters the lower cavity 312 through the inner flow channel 325 as usual, but at this time, the extrusion force of the oil in the upper cavity 311 is too large, the inner flow channel 325 cannot meet the oil passing demand, the oil in the upper cavity 311 enters the pressure relief cavity through the pressure relief hole against the force of the elastic sealing structure 100, and then enters the lower cavity 312 through the overflow hole 332 in the side of the pressure relief cavity, so as to relieve the extrusion force of the oil in the upper cavity 311, and further protect the internal components of the damper 3 from being damaged due to the quick pressing force.

[0053] In the door opening process, the force applied by the door body 2 on the damper 3 is constantly changing, and the damper 3 is self-adaptive to the gravity of the door body 2 through expansion and contraction, so as to realize stable control of the damping of the door body 2; in the slow opening or quick opening of the door body 2, especially in the quick opening process, the force applied by the user on the door body 2 suddenly increases, and the damper quickly realizes self-adaptation through the cooperation of the expansion and contraction structure, the overflow channel and the pressure relief hole 324, so as to protect the damper and meet the needs of the user for quick opening of the door.

[0054] Embodiment 2:

[0055] The difference between the embodiment and the embodiment 1 is that: Figure 7As shown, the elastic sealing structure comprises an elastic ring 104 constrained at an inner top wall of the pressure relief cavity 331, and an elastic plug 105 connected to the elastic ring 104 through an elastic arm 106 and arranged corresponding to the lower end port of the plug-in adapter 333, and the elastic plug 105 keeps the tendency of being pressed upward to close the lower end port of the plug-in adapter 333.

[0056] In the description and claims of the present application, terms are used to generally refer to the relative position of one part to another part. These terms are used only for the convenience of description and are not intended to limit the scope of the application. For example, the terms "upper", "lower", "top", "bottom", "front", "back", "side", "end", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "right", "side", "top", "bottom", "left", "

Claims

1. A damper for a washing machine, characterised in that: The utility model relates to a piston structure of a washing machine, which comprises a housing for connecting with the door body of the washing machine, having a hollow inner cavity; a piston, which is arranged in the inner cavity and reciprocally moves up and down along the inner cavity, and separates the inner cavity into an upper cavity and a lower cavity, both of which are filled with liquid, and the piston is provided with a flow passage and a pressure relief hole for the liquid to pass through; a pad, which is arranged close to the lower surface of the piston; a piston rod, which is used for connecting with the box body of the washing machine, the first end of the piston rod extends into the housing through the lower end of the housing and is connected with the piston and moves synchronously with the piston, and the second end of the piston rod is located below the housing; a first sealing element, which is arranged in the lower cavity and close to the lower end of the housing; an elastic sealing structure, which is arranged between the piston and the piston rod, and keeps the tendency of moving towards the piston to close the lower end of the pressure relief hole; and a first elastic element, which is arranged in the upper cavity, and keeps the piston always moving downwards. The piston comprises a first section, a second section and a third section arranged in sequence along the up-down direction, the outer peripheral wall of the first section is close to or in contact with the inner wall of the housing, the first section is provided with an opening penetrating along the axial direction, the diameter of the second section is smaller than that of the first section, the third section is in the shape of a tapered table with a large upper end and a small lower end, the flow passage is arranged on the third section, and the outer periphery of the second section is sleeved with a sealing ring which can reciprocally move along the axial direction of the second section and is in contact with the inner wall of the housing, and the sealing ring blocks part of the flow passage when close to the upper surface of the third section. The third section is provided with an inner flow channel penetrating along the axial direction, and the outer peripheral wall of the third section is provided with a side flow channel penetrating along the axial direction, and the inner flow channel and the side flow channel jointly form the flow passage, and the sealing ring blocks the upper end of the side flow channel when close to the upper surface of the third section. The lower surface of the third section is provided with a guide flow channel which circumferentially passes through more than 180 degrees from the lower port of the inner flow channel and is connected with the lower end of a side flow channel. The pressure relief hole is arranged at the central part of the piston and penetrates along the axial direction thereof, and the elastic sealing structure is arranged between the upper end of the piston rod and the lower end of the piston, and is used for opening and closing the pressure relief hole. The piston rod is internally hollow at the position close to the upper end to form a pressure relief cavity, the side part of the pressure relief cavity is provided with a flow hole connected with the lower cavity, the upper end of the piston rod is provided with a plug matched with the pressure relief hole of the piston, and the elastic sealing structure is arranged in the pressure relief cavity and is used for controlling the opening and closing of the lower port of the plug matched. The elastic sealing structure comprises a spring ball and a third elastic element, the spring ball is arranged corresponding to the lower port of the plug matched, and the third elastic element is arranged below the spring ball and keeps the spring ball always moving upwards to close the lower port of the plug matched. The elastic sealing structure comprises an elastic ring and an elastic plug, the elastic ring is constrained at the inner top wall of the pressure relief cavity, the elastic plug is connected with the elastic ring through an elastic arm, is arranged corresponding to the lower port of the plug matched, keeps the tendency of moving upwards to press the plug matched and close the lower port of the plug matched.

2. Damper for a washing machine according to claim 1, characterized in that: ​ 3. Damper for a washing machine according to claim 2, characterized in that: ​ 4. Damper for a washing machine according to claim 3, characterized in that: ​ 5. Damper for a washing machine according to claim 2, characterized in that: ​ 6. Damper for a washing machine according to claim 5, characterized in that: ​ 7. Damper for a washing machine according to claim 6, characterized in that: ​ 8. Damper for a washing machine according to claim 6, characterized in that: ​ 9. Damper for a washing machine according to any of claims 1 to 8, characterized in that: The housing is provided with an open lower end, a cover is arranged at the open lower end to close the open lower end, a second sealing member is arranged in the inner cavity and close to the cover, the piston rod passes through the cover and the second sealing member, and a guide plate is arranged on the lower surface of the first sealing member, and a second elastic member is arranged between the guide plate and the second sealing member to keep the second sealing member close to the cover.

10. A cleaning machine comprising a cabinet having a top opening, and a door having a rim pivotally connected to the top opening for opening and closing the top opening, characterized in that: The damper is embedded in a mounting sleeve extending upward and downward, a connecting shaft is arranged at the top of the housing, the lower end of the mounting sleeve is rotationally connected with the connecting shaft, the upper end of the mounting sleeve extends into the door body and is rotationally connected with the door body, and the lower end of the piston rod of the damper abuts against the connecting shaft.

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