Door opening and closing actuator unlimited to refrigerator door shaft hinge

Abstract

The door opening and closing actuator comprises a box body, an opening is formed in one side of the box body, a door body is hinged to the box body, the box body is connected with an execution device, and the execution device drives the door body to be opened and closed. The executing device comprises a driving mechanism and a swing arm, the driving mechanism is connected to the top of the box body, one end of the swing arm is connected to the door body, the driving mechanism is in driving connection with the swing arm, the driving mechanism drives the swing arm to stretch out and draw back, and meanwhile the swing arm rotates around the driving mechanism. The device is used for opening and closing a box door, has the advantages of few overall parts, less motor output power loss, low manufacturing cost, low failure rate, direct driving connection to a door body or a hinge, suitability for various hinges and high applicability.

Description

Technical Field

[0001] The invention belongs to the technical field of actuators, and in particular relates to an actuator for opening and closing a door regardless of a refrigerator door shaft hinge. Background Art

[0002] With the continuous development and progress of society and the improvement of living standards, there are more and more types of cabinets, including independent cabinets and embedded cabinets. Embedded cabinets are divided into free embedding, zero embedding, ultra-thin embedding, zero-distance flat embedding, etc. They are becoming more and more high-end and more and more popular with the public. In order to open and close the door normally in a narrow space, the hinge of the embedded cabinet is specially designed, which makes it difficult for traditional automatic door opening and closing actuators to be applied to embedded cabinets. In addition, the output end of the traditional actuator uses a connecting rod mechanism, which has a complex structure, many parts, and a high failure rate.

[0003] Therefore, the above problems need to be solved urgently. Summary of the invention

[0004] Purpose of the invention: In order to overcome the above shortcomings, the present invention provides a door opening and closing actuator that is not limited by the door shaft hinge of the refrigerator. It is not limited by the door shaft hinge, has a compact structure, high output power, low manufacturing cost and low failure rate.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a door opening and closing actuator that is not limited to the hinge of the refrigerator door shaft, including a box body, an opening on one side of the box body, a door body hinged on the box body, and an actuator connected to the box body, and the actuator drives the door body to open and close. The actuator includes a driving mechanism and a swing arm, the driving mechanism is connected to the top of the box body, one end of the swing arm is connected to the door body, the driving mechanism and the swing arm are connected in a driving manner, the driving mechanism drives the swing arm to extend and retract, and the swing arm rotates around the driving mechanism. When opening and closing the door body, the driving mechanism drives the swing arm to extend and retract, and the swing arm pushes the door body to rotate around the hinge. The end of the swing arm connected to the door body moves in an arc with the door body, and the swing arm rotates around the driving mechanism to open or close the door body. The present invention is used for the opening and closing of the box door, and has few overall parts, compact structure, less motor output power loss, low manufacturing cost, low failure rate, and is directly connected to the door body drive, and has no requirements for hinges.

[0006] Furthermore, in the above-mentioned door opening and closing actuator not limited to the refrigerator door shaft hinge, the driving mechanism includes a shell, the shell is a hollow shell, a motor is connected inside the shell, the motor is driven and connected to a gear set, the gear set is connected inside the shell, and the gear set is driven and connected to the swing arm. During the process of opening or closing the door body, the motor rotates, and the motor drives the swing arm to move through the gear set to open or close the door body. The door body switch is controlled by the motor, which has high stability. Combined with the control system, the door body can be opened or closed accurately and smoothly, reducing failures.

[0007] Furthermore, in the above-mentioned door opening and closing actuator not limited to the refrigerator door shaft hinge, the swing arm is set in a long strip shape, a through slot is set along the swing arm, a rack is fixedly connected to the top surface of the swing arm, the rack is set along the through slot, and the output gear of the gear set passes through the through slot and meshes with the rack. The output gear of the gear set rotates, drives the rack to move, and then drives the swing arm to move. At the same time, because the output gear of the gear set passes through the through slot, the swing arm can move along the output gear of the gear set, and at the same time, the swing arm can rotate around the output gear of the gear set, that is, the swing arm can open or close the door body, and the swing arm can also rotate around the output gear of the gear set according to the angle of opening or closing of the door body. The structure is simple, the output torque loss is small, and the failure rate is low.

[0008] Furthermore, in the above-mentioned door switch actuator not limited to the refrigerator door shaft hinge, the motor shaft of the motor is connected to a worm, the gear set includes a worm wheel and a planetary gear mechanism, and the worm wheel and the worm are driven and connected. The worm wheel and the planetary gear mechanism are driven and connected through an idler gear, and the planetary gear mechanism is driven and connected to the rack. The worm wheel, worm and planetary gear mechanism give the gear set a larger transmission ratio, amplify the output torque of the motor, and the worm wheel and worm have self-locking characteristics. When the door body is opened to a certain angle, the self-locking characteristics of the worm wheel and worm can prevent the door body from moving due to its own weight, improve the user experience, and when the door body is closed, it can also avoid some unnecessary opening of the door body.

[0009] Further, in the above-mentioned door opening and closing actuator not limited to the refrigerator door shaft hinge, the planetary gear mechanism includes an inner ring gear and an outer ring gear, the outer ring gear is provided with external teeth, the outer ring gear is provided with a bottom plate, the center of the bottom plate of the outer ring gear is connected to a first gear, the outer ring gear and the first gear rotate synchronously, and the outer ring gear is meshed with an idler gear. The inner ring gear is connected to the inner side of the outer ring gear, the inner ring gear is fixedly connected to the top of the shell, the inner ring gear is provided with internal teeth, the inner ring gear is meshed with a planetary gear, the planetary gear is meshed with the first gear, the planetary gear is connected to a transmission shaft, and the transmission shaft is connected to a second gear at one end away from the planetary gear, and the second gear is the output gear of the gear set. The second gear is meshed with the rack. During the door opening and closing process, the motor drives the worm gear, the worm gear drives the outer ring gear to rotate through the idler gear, the first gear connected to the outer ring gear rotates synchronously, the first gear drives the planetary gear to rotate, the planetary gear rotates between the inner ring gear and the first gear, the planetary gear drives the transmission shaft to rotate, the transmission shaft drives the second gear to rotate, and then drives the rack to move along the second gear. The planetary gear mechanism has a compact structure, a large transmission ratio, a strong load-bearing capacity, and a smooth operation. It can amplify the motor output torque and improve the driving ability of the actuator.

[0010] Furthermore, in the above-mentioned door opening and closing actuator not limited to the refrigerator door shaft hinge, there are three or more planetary gears, and the planetary gears are arranged around the first gear array. There are more than three planetary gears, and the planetary gears rotate between the inner ring gear and the first gear, so that the planetary gears are evenly stressed during operation, which can improve the stability of the planetary gear mechanism, ensure the smooth operation of the planetary gears, and reduce the failure rate.

[0011] Furthermore, in the above-mentioned door opening and closing actuator not limited to the refrigerator door shaft hinge, the transmission shaft is connected to a synchronous wheel, the synchronous wheel and the transmission shaft are coaxially connected, the synchronous wheel is meshed and connected to an angle wheel, an angle sensor is connected in the housing, the angle wheel shaft is connected to the angle sensor, the connecting shaft connecting the angle wheel and the angle sensor is provided with a notch, and the angle sensor detects the rotation angle of the angle wheel. The angle sensor sends the detected angle signal to the control system, and the control system controls the start and stop of the driving mechanism to control the opening or closing of the door body to prevent the door body from being damaged due to over-opening or over-closing. The control system automatically controls the door body opening angle according to the received angle signal to realize the automation of opening or closing the door.

[0012] Furthermore, in the above-mentioned door opening and closing actuator not limited to the refrigerator door shaft hinge, the worm wheel is coaxially connected with an electromagnetic clutch mechanism, and the electromagnetic clutch mechanism magnetically attracts the worm wheel to separate the worm wheel and the worm. When the door body needs to be opened automatically, the electromagnetic clutch mechanism is not started, the worm wheel falls due to its own gravity, the worm wheel and the worm are engaged, and the motor can drive the door body to open or close. When the door body needs to be opened or closed manually, the control system starts the electromagnetic clutch mechanism, the electromagnetic clutch mechanism magnetically attracts the worm wheel, and the worm wheel and the worm are separated, and the door body can be opened or closed manually.

[0013] Furthermore, in the above-mentioned door opening and closing actuator not limited to the refrigerator door shaft hinge, a groove is provided on the top of the box body, and the driving mechanism is connected in the groove. The driving mechanism is arranged in the groove, which can improve the aesthetics of the box body.

[0014] Furthermore, in the above-mentioned door opening and closing actuator which is not limited to the hinge of the refrigerator door shaft, the box body and the door body are hinged by a hinge mechanism, and the hinge mechanism includes a fixed seat and a movable part, the fixed seat and the movable part are hinged, the fixed seat and the box body are connected, and the movable part and the door body are connected. The swing arm is connected to the movable part axis at one end away from the box body. The embedded box requires a special hinge design, and the motion trajectory of the special hinge movable part is a special curve. The conventional actuator usually opens or closes with a linear or arc-shaped motion trajectory, which cannot meet the needs of the embedded box. The present invention connects the swing arm and the movable part of the hinge mechanism, and by driving the movable part to move, the swing arm can rotate along with the movement of the movable part during the pushing process, which meets the needs of the special motion curve, realizes the opening or closing of the door body, and improves the applicability of the actuator.

[0015] It can be seen from the above technical scheme that the present invention has the following beneficial effects: the present invention is not limited to the door opening and closing actuator of the refrigerator door shaft hinge, has a compact structure, high output power, low manufacturing cost, low failure rate, and is directly connected to the door body drive, or connected to the hinge movable part drive. The swing arm can rotate and move with the movement of the movable part to meet the needs of special motion curves, is not restricted by the hinge, and has high applicability. The worm gear is magnetically attracted by the electromagnetic clutch mechanism to separate the worm gear and the worm screw to realize manual opening and closing of the door body. The self-locking characteristics of the worm gear and the worm screw can prevent the door body from moving due to its own weight, improve the user experience, and when the door body is closed, some unnecessary opening of the door body can also be avoided. The planetary gear mechanism is used to amplify the output torque of the motor and improve the driving ability of the actuator. The planetary gear mechanism has a compact structure, a large transmission ratio, a strong bearing capacity, and a stable operation, which reduces the failure rate of the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a door opening and closing actuator of the present invention which is not limited to a refrigerator door shaft hinge; Figure 2 is a schematic diagram of the structure of the execution device; Figure 3 is an internal schematic diagram of the driving mechanism; Figure 4 is a schematic structural diagram of the swing arm; Figure 5 for Figure 3 Explosion diagram of Figure 6 for Figure 1 A partial enlarged view of .

[0017] In the figure: 1, box body, 11, groove, 2, door body, 3, driving mechanism, 31, shell, 32, motor, 33, gear set, 331, worm gear, 332, planetary gear mechanism, 3321, inner ring gear, 3322, outer ring gear, 3323, first gear, 3324, planetary gear, 3325, transmission shaft, 3326, second gear, 3327, synchronous wheel, 3328, angle wheel, 3329, angle sensor, 333, idler wheel, 334, electromagnetic clutch mechanism, 34, worm, 4, swing arm, 41, through slot, 42, rack, 5, hinge mechanism, 51, fixed seat, 52, movable part. DETAILED DESCRIPTION

[0018] Example 1 like Figure 1-2The door opening and closing actuator shown in the figure is not limited to the refrigerator door shaft hinge, including a box body 1, one side of the box body 1 is open, the box body 1 is hinged with a door body 2, and the box body 1 is connected with an actuator, and the actuator drives the door body 2 to open and close. The actuator includes a driving mechanism 3 and a swing arm 4, the driving mechanism 3 is connected to the top of the box body 1, one end of the swing arm 4 is connected to the door body 2, the driving mechanism 3 and the swing arm 4 are drivingly connected, the driving mechanism 3 drives the swing arm 4 to extend and retract, and the swing arm 4 rotates around the driving mechanism 3. A groove 11 is provided on the top of the box body 1, and the driving mechanism 3 is connected in the groove 11.

[0019] like Figure 3 The door opening and closing actuator shown is not limited to the refrigerator door shaft hinge, and the driving mechanism 3 includes a shell 31, the shell 31 is a hollow shell, a motor 32 is connected to the shell 31, the motor 32 is driven and connected to a gear set 33, the gear set 33 is connected to the shell 30, and the gear set 33 is driven and connected to the swing arm 4.

[0020] like Figure 4 The door opening and closing actuator shown is not limited to the refrigerator door shaft hinge, and the swing arm 4 is set to be a long strip, and a through groove 41 is set along the swing arm 4. A rack 42 is fixedly connected to the top surface of the swing arm 4, and the rack 42 is set along the through groove 41. The output gear of the gear set 33 passes through the through groove 41 and meshes with the rack 42.

[0021] like Figure 5 The door opening and closing actuator shown is not limited to the refrigerator door shaft hinge, the motor shaft of the motor 32 is connected to the worm 34, the gear set 33 includes a worm wheel 331 and a planetary gear mechanism 332, and the worm wheel 331 and the worm 34 are drivingly connected. The worm wheel 331 and the planetary gear mechanism 332 are drivingly connected through the idler wheel 333, and the planetary gear mechanism 332 and the rack 42 are drivingly connected. The worm wheel 331, the worm 34 and the planetary gear mechanism 332 give the gear set 33 a larger transmission ratio, amplify the output torque of the motor 32, and the worm wheel 331 and the worm 34 have self-locking characteristics.

[0022] The planetary gear mechanism 332 includes an inner ring gear 3321 and an outer ring gear 3322. The outer ring gear 3322 is provided with external teeth, and the outer ring gear 3322 is provided with a bottom plate. The center of the bottom plate of the outer ring gear 3322 is connected to a first gear 3323. The outer ring gear 3322 and the first gear 3323 rotate synchronously, and the outer ring gear 3322 is meshed with an idler gear 333. The inner ring gear 3321 is connected to the inner side of the outer ring gear 3322, and the inner ring gear 3321 is fixedly connected to the top of the housing 31. The inner ring gear 3321 is provided with internal teeth, and the inner ring gear 3321 is meshed with a planetary gear 3324. The planetary gear 3324 is meshed with the first gear 3323. The planetary gear 3324 is connected to a transmission shaft 3325. The transmission shaft 3325 is connected to a second gear 3326 at one end away from the planetary gear 3324. The second gear 3326 is the output gear of the gear set 33. The second gear 3326 is meshed with the rack 42. There are three or more planetary gears 3324, which are arranged in an array around the first gear 3323. The transmission shaft 3325 is connected with a synchronous wheel 3327, which is coaxially connected to the transmission shaft 3325, and the synchronous wheel 3327 is meshed with an angle wheel 3328. An angle sensor 3329 is connected inside the housing 31, and the angle wheel 3328 is axially connected to the angle sensor 3329. The connecting shaft connecting the angle wheel 3328 and the angle sensor 3329 is provided with a notch, and the angle sensor 3329 detects the rotation angle of the angle wheel 3328. The worm wheel 331 is coaxially connected with an electromagnetic clutch mechanism 334, and the electromagnetic clutch mechanism 334 magnetically attracts the worm wheel 331 to separate the worm wheel 331 and the worm 34.

[0023] When the door body 2 needs to be opened automatically, the electromagnetic clutch mechanism 334 is not started, the worm wheel 331 falls due to its own gravity, and the worm wheel 331 meshes with the worm 34. The motor 32 is started, and the motor 32 drives the worm wheel 331 to rotate. The worm wheel 331 drives the outer ring gear 3322 to rotate through the idler gear 333. The first gear 3323 connected to the outer ring gear 3322 rotates synchronously. The first gear 3323 drives the planetary gear 3324 to rotate between the inner ring gear 3321 and the first gear 3323. The planetary gear 3324 drives the transmission shaft 3325 to rotate. The transmission shaft 3325 drives the second gear 3326 to rotate, and then drives the rack 42 to move along the second gear 3326. The swing arm 4 extends, and the swing arm 4 pushes the door body 2 to rotate around the hinge. The end of the swing arm 4 connected to the door body 2 moves in an arc with the door body 2. At the same time, the swing arm 4 rotates around the second gear 3326 to open or close the door body 2. The angle sensor 3329 detects the rotation angle of the shaft connected to the angle wheel 3328, and sends the detected angle signal to the control system, which controls the motor 32 to work, thereby controlling the opening angle of the door body 2. Accordingly, when the door body 2 needs to be closed automatically, the motor 32 reverses and closes the door body 2 through the swing arm 4. When the door body 2 needs to be opened and closed manually, the electromagnetic clutch mechanism 334 magnetically attracts the worm wheel 331, and the worm wheel 331 and the worm 34 are separated, and the door body 2 is opened and closed manually.

[0024] Example 2 The difference between this embodiment and embodiment 1 is that Figure 6 As shown, the box body 1 and the door body 2 are hinged by a hinge mechanism 5, and the hinge mechanism 5 includes a fixed seat 51 and a movable part 52, the fixed seat 51 and the movable part 52 are hinged, the fixed seat 51 is connected to the box body 1, and the movable part 52 is connected to the door body 2. The end of the swing arm 4 away from the box body 1 is axially connected to the movable part 52. The swing arm 4 is connected to the movable part 52 of the hinge mechanism 5, and the swing arm 4 drives the movable part 5 to move. The swing arm 4 rotates following the movement of the movable part 5 during the pushing process.

[0025] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the present invention so that people familiar with this field can understand the content of the present invention and implement it accordingly, and they cannot limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A door opening and closing actuator not limited to refrigerator door shaft hinge, characterized in that: The invention comprises a box body (1), one side of the box body (1) is open, the box body (1) is hinged with a door body (2), the box body (1) is connected with an actuator, and the actuator drives the door body (2) to open and close; the actuator comprises a driving mechanism (3) and a swing arm (4), the driving mechanism (3) is connected to the top of the box body (1), one end of the swing arm (4) is connected to the door body (2), the driving mechanism (3) and the swing arm (4) are drivingly connected, the driving mechanism (3) drives the swing arm (4) to extend and retract, and at the same time, the swing arm (4) rotates around the driving mechanism (3).

2. The door opening and closing actuator of any refrigerator door hinge according to claim 1, characterized in that: The driving mechanism (3) comprises a housing (31), the housing (31) being a hollow housing, a motor (32) being connected inside the housing (31), the motor (32) being drivingly connected to a gear set (33), the gear set (33) being connected inside the housing (30), and the gear set (33) being drivingly connected to the swing arm (4).

3. The door opening and closing actuator of any refrigerator door hinge according to claim 2, characterized in that: The swing arm (4) is configured to be in the shape of an elongated strip, a through slot (41) is provided along the swing arm (4), a rack (42) is fixedly connected to the top surface of the swing arm (4), the rack (42) is provided along the through slot (41), and the output gear of the gear set (33) passes through the through slot (41) and meshes with the rack (42).

4. The door opening and closing actuator of any refrigerator door hinge according to claim 3 is characterized in that: The motor shaft of the motor (32) is connected to a worm (34); the gear set (33) comprises a worm wheel (331) and a planetary gear mechanism (332); the worm wheel (331) and the worm (34) are drivingly connected; the worm wheel (331) and the planetary gear mechanism (332) are drivingly connected via an idler wheel (333); and the planetary gear mechanism (332) and the rack (42) are drivingly connected.

5. The door opening and closing actuator of any refrigerator door hinge according to claim 4, characterized in that: The planetary gear mechanism (332) comprises an inner ring gear (3321) and an outer ring gear (3322), wherein the outer ring gear (3322) is provided with external teeth, and the outer ring gear (3322) is provided with a bottom plate, and the center of the bottom plate of the outer ring gear (3322) is connected to a first gear (3323), and the outer ring gear (3322) and the first gear (3323) rotate synchronously, and the outer ring gear (3322) and the idler gear (333) are meshed; the inner ring gear (3321) is connected to the inner side of the outer ring gear (3322), and the inner ring gear (3321) is fixed to the outer ring gear (3322). The inner ring gear (3321) is fixedly connected to the top of the housing (31); the inner ring gear (3321) is provided with internal teeth; the inner ring gear (3321) is meshed with a planetary gear (3324); the planetary gear (3324) is meshed with a first gear (3323); the planetary gear (3324) is connected to a transmission shaft (3325); the transmission shaft (3325) is connected to a second gear (3326) at one end away from the planetary gear (3324); the second gear (3326) is an output gear of the gear set (33); and the second gear (3326) is meshed with a rack (42).

6. The door opening and closing actuator of any refrigerator door hinge according to claim 5, characterized in that: There are three or more planetary gears (3324), and the planetary gears (3324) are arranged in an array around the first gear (3323).

7. The door opening and closing actuator of any refrigerator door hinge according to claim 5, characterized in that: The transmission shaft (3325) is connected to a synchronous wheel (3327), the synchronous wheel (3327) and the transmission shaft (3325) are coaxially connected, the synchronous wheel (3327) is meshingly connected to an angle wheel (3328), an angle sensor (3329) is connected inside the housing (31), the angle wheel (3328) is axially connected to the angle sensor (3329), a connecting shaft connecting the angle wheel (3328) and the angle sensor (3329) is provided with a notch, and the angle sensor (3329) detects the rotation angle of the angle wheel (3328).

8. The door opening and closing actuator of any refrigerator door hinge according to claim 4, characterized in that: The worm wheel (331) is coaxially connected to an electromagnetic clutch mechanism (334), and the electromagnetic clutch mechanism (334) magnetically attracts the worm wheel (331) to separate the worm wheel (331) and the worm (34).

9. The door opening and closing actuator of any refrigerator door hinge according to claim 1, characterized in that: The top of the box body (1) is provided with a groove (11), and the driving mechanism (3) is connected in the groove (11).

10. The door opening and closing actuator of any refrigerator door hinge according to claim 1, characterized in that: The box body (1) and the door body (2) are hingedly connected via a hinge mechanism (5), wherein the hinge mechanism (5) comprises a fixed seat (51) and a movable part (52), wherein the fixed seat (51) and the movable part (52) are hingedly connected, wherein the fixed seat (51) is connected to the box body (1), and the movable part (52) is connected to the door body (2); and an end of the swing arm (4) away from the box body (1) is axially connected to the movable part (52).

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