Door jacking device

Abstract

The utility model discloses a top door device, which comprises a shell, a top door and a top door, the driving assembly is arranged in the mounting cavity and provided with a driving end, and the driving end of the driving assembly can move in the door opening and closing direction of the dish washing machine; the buffer assembly is arranged in the mounting cavity and is connected with the driving end of the driving assembly; the ejector rod is arranged in the mounting cavity and is connected with the buffer assembly; wherein the driving assembly drives the ejector rod to extend out of or retract into the mounting cavity through the buffer assembly, and the ejector rod is used for abutting against a door body of the dish-washing machine so that the door body of the dish-washing machine can be opened at a certain angle; compared with the prior art, according to the door jacking device, due to the fact that the buffering assembly has the process of resisting the locking force of the door body when the door is opened, the jacking rod cannot jack the door body once, when the force of the buffering assembly is larger than the locking force of the door body, the door lock is jacked open, and meanwhile the door body generates an impact effect in the door opening direction under the action of the force of the buffering assembly; the opening degree of the door can be separated from the ejector rod, and the door can be opened at a larger angle.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a top door device. Background Art

[0002] A dishwasher is a device that automatically washes tableware such as bowls, chopsticks, plates, dishes, knives, forks, etc. In the prior art, after the dishwasher is dried, high-temperature steam will be ejected when the dishwasher door is opened, which may cause harm to the user. Therefore, the utility model proposes a dishwasher door-lifting device. In the existing door-lifting device, the driving component is directly connected to the push rod. When the dishwasher door needs to be opened, the driving component directly drives the push rod to extend, and the push rod directly acts on the door body. The instantaneous impact force will damage the door body, and when the motor fails, the door body rebounds under the action of gravity and directly acts on the push rod, which will cause damage to the push rod and the door body. Utility Model Content

[0003] The purpose of the utility model is to provide a door lifting device, which is used to solve the above technical problems.

[0004] A top door device for a dishwasher, comprising:

[0005] A housing having a mounting cavity;

[0006] A driving assembly is disposed in the installation cavity and has a driving end, and the driving end can move along the direction of opening and closing the door of the dishwasher;

[0007] A buffer assembly is disposed in the mounting cavity and connected to the driving end of the driving assembly;

[0008] A push rod, which is disposed in the mounting cavity and connected to the buffer assembly;

[0009] The driving assembly drives the push rod to extend out of or retract into the installation cavity through the buffer assembly, and the push rod is used to support the door body of the dishwasher so that the door body of the dishwasher is opened at a certain angle.

[0010] According to one embodiment of the utility model, the driving assembly includes a driving motor, a driving screw, a screw connecting piece and a reduction gearbox, the output end of the driving motor is connected to the reduction gearbox, the driving end of the reduction gearbox is connected to the driving screw, the screw connecting piece is threadedly connected to the driving screw, the screw connecting piece forms the driving end of the driving assembly, and the buffer assembly is connected to the screw connecting piece.

[0011] According to one embodiment of the utility model, a rotating seat is provided in the installation cavity, and one end of the driving screw rod facing the door body of the dishwasher is rotatably connected to the rotating seat.

[0012] According to one embodiment of the utility model, a sliding cavity is provided in the installation cavity of the shell, the sliding cavity penetrates the installation cavity and faces the side of the door body of the dishwasher, and the push rod is slidably connected in the sliding cavity.

[0013] According to an embodiment of the present utility model, the screw connecting piece is provided with sliding grooves corresponding to the two side wall surfaces of the sliding cavity, and the sliding grooves are slidably connected to the two side wall surfaces of the sliding cavity.

[0014] According to an embodiment of the present utility model, the buffer assembly includes a pin and a compression spring. The pin is slidably connected to the driving end of the driving assembly, its upper end is connected to the ejector rod, and the compression spring is sleeved on the pin and located between the ejector rod and the screw connecting piece.

[0015] According to an embodiment of the present utility model, a protection assembly is further included. The protection assembly includes a microswitch and a buffer rubber pin. One end of the buffer rubber pin is connected to the driving end of the driving assembly, and the other end faces the microswitch. When the driving end of the driving assembly moves in the door-opening direction, the force exerted by the buffer rubber pin on the microswitch becomes smaller until it leaves the microswitch. When the driving end of the driving assembly moves in the direction opposite to the door-opening direction, the buffer rubber pin gradually approaches the microswitch until the other end thereof acts on the microswitch.

[0016] According to an embodiment of the present utility model, when the buffer rubber pin leaves the microswitch, the driving assembly stops operating. When the acting force of the buffer rubber pin on the microswitch is the largest, the driving assembly stops operating.

[0017] According to an embodiment of the present utility model, the installation cavity of the housing has a protection plate located above the microswitch. The protection plate has a through hole facing the buffer rubber pin, and the downward projection of the bottom cross-sectional area of the buffer rubber pin is larger than the area of the through hole.

[0018] According to an embodiment of the present utility model, a protection pad is provided at one end of the ejector rod facing the door body of the dishwasher, and the protection pad extends out of the cavity of the housing.

[0019] Compared with the prior art, the top door device of the present utility model has the following advantages:

[0020] For the top door device of the present utility model, since the buffer assembly has a process of counteracting the door body locking force during door opening, the ejector rod will not push open the door body all at once. When the buffer assembly is greater than the door body locking force, the door lock is pushed open. At the same time, under the action of the force of the buffer assembly, the door body generates an impact in the door-opening direction, so that the opening degree of the door can break away from the ejector rod and open a larger angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the top door device of the present utility model;

[0022] Figure 2 is a sectional view of the top door device of the present utility model;

[0023] Figure 3This is a sectional view of the door top device of the present utility model in another direction;

[0024] Figure 4 This is an exploded view of the door top device of the present utility model;

[0025] In the figure: 1. housing, 11. rotating seat, 12. protection plate, 2. driving assembly, 21. driving motor, 22. driving screw, 23. screw connecting piece, 24. reduction gearbox, 3. buffer assembly, 31. pin, 32. compression spring, 4. ejector rod, 41. protection pad, 5. protection assembly, 51. microswitch, 52. buffer rubber nail.

[0026] The realization and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0027] The following will disclose multiple embodiments of the present utility model in the form of diagrams. For the sake of clarity, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some well-known and commonly used structures and components will be shown in a simple schematic manner in the diagrams.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0029] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] To further understand the content, characteristics and effects of the present utility model, the following embodiments are cited and described in detail with the accompanying drawings as follows:

[0031] Please refer to Figures 1 to 3, the present utility model discloses a door top device. The door top device disclosed by the present utility model is used for a dishwasher and includes a housing 1, a driving component 2, a buffer component 3, and a top rod 4. The housing 1 has an installation cavity; the driving component 2 is arranged in the installation cavity and has a driving end, and its driving end can move along the door opening and closing direction of the dishwasher; the buffer component 3 is arranged in the installation cavity and is connected to the driving end of the driving component 2; the top rod 4 is arranged in the installation cavity and is connected to the buffer component 3; wherein, the driving component 2 drives the top rod 4 to extend out of or retract into the installation cavity through the buffer component 3, and the top rod 4 is used to hold against the door body of the dishwasher so that the door body of the dishwasher can be opened at a certain angle. For the door top device of the present utility model, when opening the door body of the dishwasher, the driving component 2 is started, the driving end of the driving component 2 moves towards the door opening direction of the dishwasher and drives the buffer component 3 to move towards the door opening direction of the dishwasher. At this time, the force exerted on the top rod 4 by the gravity of the door body of the dishwasher itself is greater than the force exerted on the top rod 4 by the buffer component 3, and the buffer component 3 is compressed between the driving end of the driving component 2 and the top rod 4. The driving end of the driving component 4 continues to move towards the door opening direction until the force exerted on the top rod 4 by the buffer component 3 is greater than the force exerted on the top rod 4 by the gravity of the door body, the compressed length of the buffer component 3 becomes smaller and the door body is pushed to rotate through the top rod 4, and the door body rotates and is opened at a certain angle; when closing the door body, the driving component 2 is started, its driving end moves away from the door opening direction, the buffer component 3 moves away from the door opening direction along with the driving end of the driving component 2, the compressed length of the buffer component 3 starts to become smaller, the force transmitted by the buffer component 3 to the top rod 4 becomes smaller, and under the action of the gravity of the door body, the door body starts to close.

[0032] For the door top device of the present utility model, since the buffer component 3 has a process of counteracting the door body locking force when opening the door, the top rod 4 will not push open the door body all at once. When the force of the buffer component 3 is greater than the door body locking force, the door lock is pushed open. At the same time, under the action of the force of the buffer component 3, the door body generates an impact force towards the door opening direction, so that the opening degree of the door can break away from the top rod 4 and open at a larger angle.

[0033] Please refer to Figure 2 , for the door top device of the present utility model, the driving component 2 includes a driving motor 21, a driving screw 22, a screw connecting piece 23, and a reduction gearbox 24. The output end of the driving motor 21 is connected to the reduction gearbox 24, the driving end of the reduction gearbox 24 is connected to the driving screw 22, the screw connecting piece 23 is screwed to the driving screw 22, the screw connecting piece 23 forms the driving end of the driving component 2, and the buffer component 3 is connected to the screw connecting piece 23. When the driving motor 21 is started, the driving motor 21 drives the driving screw 22 to rotate through the reduction gearbox 24, so that the driving screw 22 rotates at a low speed, the screw connecting piece 23 moves along the screw towards the door opening direction or away from the door opening direction, and the screw connecting piece 23 drives the buffer component 3 to move towards or away from the door opening direction, so that the buffer component 3 drives the top rod 4 to extend and retract in the installation cavity.

[0034] Please refer to Figure 2 , for the top door device of the present utility model, a rotating seat 11 is provided in the installation cavity, and one end of the driving screw 22 facing the door body of the dishwasher is rotatably connected in the rotating seat 11. When the driving motor 21 is started, the driving screw 22 can only rotate and will not shift, which can ensure the linear movement of the screw connecting piece 23.

[0035] Please refer to Figure 2 , for the top door device of the present utility model, a sliding cavity is provided in the installation cavity of the housing 1, the sliding cavity penetrates through one side of the installation cavity facing the door body of the dishwasher, and the top rod 4 is slidably connected in the sliding cavity. When the driving motor 21 is started, the driving screw 22 rotates, and the screw connecting piece 23 moves along the screw in the direction of opening the door or in the direction opposite to opening the door. The screw connecting piece 23 drives the buffer assembly 3 to move in the direction of opening the door or in the direction opposite to opening the door. The buffer assembly 3 drives the top rod 4 to expand and contract in the installation cavity along the sliding cavity, which can ensure the linear movement of the top rod 4.

[0036] For the top door device of the present utility model, the screw connecting piece 23 is provided with chutes corresponding to the two side wall surfaces of the sliding cavity, and the chutes are slidably connected to the two side wall surfaces of the sliding cavity. When the driving motor 21 is started and the driving screw 22 rotates, when the screw connecting piece 23 moves along the screw in the direction of opening the door or in the direction opposite to opening the door, the chutes slide along the two side wall surfaces of the driving cavity, which can ensure the linear movement of the screw connecting piece 23 and prevent the moving direction of the top rod 4 from shifting.

[0037] Please refer to Figure 2 , for the top door device of the present utility model, the buffer assembly 3 includes a pin 31 and a compression spring 32. The pin 31 is slidably connected to the driving end of the driving assembly 2, its upper end is connected to the top rod 4, and the compression spring 32 is sleeved on the pin 31 and is located between the top rod 4 and the screw connecting piece 23. When the buffer assembly 3 moves in the direction of opening the door along with the screw connecting piece 23, the screw connecting piece 23 squeezes the compression spring 32 in the direction of opening the door. Under the action of the gravity of the door body itself, the compression spring is compressed between the screw connecting piece 23 and the top rod 4. When the driving motor 21 drives the screw connecting piece 23 to move a certain distance in the direction of opening the door through the driving screw 22, the force exerted on the top rod 4 by the screw connecting piece 23 through the compression spring 32 is greater than the force exerted on the top rod 4 by the gravity of the door body. The compression spring 32 extends and pushes the top rod 4 to move in the direction of opening the door, and the door body is opened instantly when the compression spring 32 expands. When closing the door body, when the buffer assembly 3 moves in the direction opposite to opening the door along with the screw connecting piece 23, the screw connecting piece 23 moves away from the compression spring 32. Under the action of the gravity of the door body itself, the length of the compression spring 32 compressed between the screw connecting piece 23 and the top rod 4 becomes smaller, and the acting force of the gravity of the door body on the top rod 4 begins to be greater than the acting force of the compression spring 32 on the top rod 4. When the driving motor 21 drives the screw connecting piece 23 to move in the direction opposite to opening the door through the driving screw 22, the door body closes slowly.

[0038] Please refer to Figure 2 and Figure 3 For the top door device of the present utility model, it further includes a protection component 5. The protection component 5 includes a microswitch 51 and a buffer rubber nail 52. One end of the buffer rubber nail 52 is connected to the driving end of the driving component 2, and the other end faces the microswitch 51. When the driving end of the driving component 2 moves in the door-opening direction, the force exerted by the buffer rubber nail 52 on the microswitch 51 becomes smaller until it leaves the microswitch 51. When the driving end of the driving component 2 moves in the direction opposite to the door-opening direction, the buffer rubber nail 52 gradually approaches the microswitch 51 until its other end acts on the microswitch 51. When the driving motor 21 drives the screw connecting piece 23 to move in the door-opening direction through the driving screw 22, the buffer rubber nail 52 moves in the door-opening direction along with the screw connecting piece 23, and the extrusion force of the buffer rubber nail 52 on the microswitch 51 gradually becomes smaller. When the door opening is in place, the buffer rubber nail 52 leaves the microswitch. At this time, the resistance of the microswitch 51 connected to the circuit is the smallest and the current is the largest. After the control system of the dishwasher receives the current signal of the microswitch, it shuts down the driving motor 21, which can prevent the driving motor from driving the screw connecting piece 23 to move over-position in the door-opening direction. When the driving motor 21 drives the screw connecting piece 23 to move in the direction opposite to the door-opening direction through the driving screw 22, the buffer rubber nail 52 moves in the direction opposite to the door-opening direction along with the screw connecting piece 23. The buffer rubber nail 52 starts to approach the microswitch 51 and touches the microswitch 51. The extrusion force of the buffer rubber nail 52 on the microswitch 51 gradually becomes larger. When the door closing is in place, the extrusion force of the buffer rubber nail 52 on the microswitch is the largest. At this time, the resistance of the microswitch 51 connected to the circuit is the largest and the current is the smallest. After the control system of the dishwasher receives the current signal of the microswitch, it shuts down the driving motor 21, which can prevent the driving motor from driving the screw connecting piece 23 to move over-position in the door-closing direction and damaging the microswitch.

[0039] For the top door device of the present utility model, when the buffer rubber pin 52 leaves the microswitch 51, the driving assembly 2 stops operating. When the acting force of the buffer rubber pin 52 on the microswitch 51 is the largest, the driving assembly 2 stops operating. When the driving motor 21 drives the screw connecting piece 23 to move in the door-opening direction through the driving screw 22, the buffer rubber pin 52 moves in the door-opening direction along with the screw connecting piece 23, and the extrusion force of the buffer rubber pin 52 on the microswitch 51 gradually becomes smaller. When the door opening is in place, the buffer rubber pin 52 leaves the microswitch. At this time, the resistance of the microswitch 51 connected to the circuit is the smallest and the current is the largest. After the control system of the dishwasher receives the current signal of the microswitch, it shuts down the driving motor 21, which can prevent the driving motor from driving the screw connecting piece 23 to move over-position in the door-opening direction. When the driving motor 21 drives the screw connecting piece 23 to move in the door-opening direction, the buffer rubber pin 52 moves in the door-opening direction along with the screw connecting piece 23. The buffer rubber pin 52 starts to approach the microswitch 51 and touches the microswitch 51. The extrusion force of the buffer rubber pin 52 on the microswitch 51 gradually becomes larger. When the door closing is in place, the extrusion force of the buffer rubber pin 52 on the microswitch is the largest. At this time, the resistance of the microswitch 51 connected to the circuit is the largest and the current is the smallest. After the control system of the dishwasher receives the current signal of the microswitch, it shuts down the driving motor 21, which can prevent the driving motor from driving the screw connecting piece 23 to move over-position in the door-closing direction and damaging the microswitch.

[0040] Please refer to Figure 2 and Figure 3 For the top door device of the present utility model, in the installation cavity of the housing 1, there is a protection plate 12 above the microswitch 51. The protection plate 12 has a through hole facing the buffer rubber pin 52, and the downward projection of the bottom cross-sectional area of the buffer rubber pin 52 is larger than the area of the through hole. When the screw connecting plate 23 drives the buffer rubber pin 52 to move in the direction close to the microswitch 51, the buffer rubber pin 52 first acts on the protection plate 12, and then acts on the microswitch 51 during the process of being extruded and deformed by the protection plate 12. The protection plate 12 can protect the microswitch 51 and prevent the buffer rubber pin 52 from directly acting on the microswitch 51 when approaching the microswitch 51.

[0041] Please refer to Figure 1 and Figure 2 For the top door device of the present utility model, a protection pad 41 is provided at one end of the top rod 4 facing the door body of the dishwasher, and the protection pad 41 extends out of the cavity of the housing 1. When the driving motor 21 starts and drives the buffer assembly 3 to move in the door-opening direction through the screw connecting piece 23, the top rod 4 extends towards the door body, and the protection pad 41 on the top rod 4 contacts the door body, which can protect the door body and prevent damage to the part in contact with the door body.

[0042] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements or improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A top door device for a dishwasher, characterized in that: include: A housing (1) having a mounting cavity; A driving assembly (2), which is arranged in the installation cavity and has a driving end, and the driving end can move along the direction of opening and closing the door of the dishwasher; A buffer assembly (3) disposed in the mounting cavity and connected to a driving end of the driving assembly (2); A push rod (4), which is disposed in the installation cavity and connected to the buffer assembly (3); The driving assembly (2) drives the push rod (4) to extend out of or retract into the installation cavity via the buffer assembly (3); the push rod (4) is used to support the door body of the dishwasher so that the door body of the dishwasher opens at a certain angle.

2. The door lifting device according to claim 1, characterized in that: The driving assembly (2) comprises a driving motor (21), a driving screw (22), a screw connecting piece (23) and a reduction box (24); the output end of the driving motor (21) is connected to the reduction box (24); the driving end of the reduction box (24) is connected to the driving screw (22); the screw connecting piece (23) is threadedly connected to the driving screw (22); the screw connecting piece (23) forms the driving end of the driving assembly (2); and the buffer assembly (3) is connected to the screw connecting piece (23).

3. The door lifting device according to claim 2, characterized in that: A rotating seat (11) is provided in the installation cavity, and one end of the driving screw rod (22) facing the door body of the dishwasher is rotatably connected to the rotating seat (11).

4. The door lifting device according to claim 2, characterized in that: The installation cavity of the shell (1) comprises a sliding cavity, the sliding cavity passes through a side of the installation cavity facing the door body of the dishwasher, and the top rod (4) is slidably connected to the sliding cavity.

5. The door lifting device according to claim 4, characterized in that: The screw connecting piece (23) is provided with sliding grooves corresponding to the two side walls of the sliding cavity, and the sliding grooves are slidably connected to the two side walls of the sliding cavity.

6. The door lifting device according to claim 2, characterized in that: The buffer assembly (3) comprises a pin (31) and a compression spring (32); the pin (31) is slidably connected to the driving end of the driving assembly (2), and its upper end is connected to the push rod (4); the compression spring (32) is sleeved on the pin (31) and is located between the push rod (4) and the screw connecting piece (23).

7. The door lifting device according to claim 1, characterized in that: The invention also comprises a protection component (5), wherein the protection component (5) comprises a micro switch (51) and a buffer rubber nail (52), wherein one end of the buffer rubber nail (52) is connected to the driving end of the driving component (2), and the other end faces the micro switch (51); when the driving end of the driving component (2) moves in the door opening direction, the force exerted by the buffer rubber nail (52) on the micro switch (51) decreases until the buffer rubber nail (52) leaves the micro switch (51); when the driving end of the driving component (2) moves away from the door opening direction, the buffer rubber nail (52) gradually approaches the micro switch (51) until the other end thereof acts on the micro switch (51).

8. The door lifting device according to claim 7, characterized in that: When the buffer rubber nail (52) leaves the micro switch (51), the driving component (2) stops moving, and when the force exerted by the buffer rubber nail (52) on the micro switch (51) is maximum, the driving component (2) stops moving.

9. The door lifting device according to claim 7, characterized in that: The housing (1) has a protective plate (12) located above the micro switch (51) in the mounting cavity, the protective plate (12) having a through hole facing the buffer rubber nail (52), and the bottom cross-sectional area of ​​the buffer rubber nail (52) projected downward is larger than the area of ​​the through hole.

10. The door lifting device according to claim 1, characterized in that: A protective pad (41) is provided at one end of the top rod (4) facing the door body of the dishwasher, and the protective pad (41) extends out of the cavity of the shell (1).

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