Electric door opening mechanism and refrigerator
By using an eccentric gear set design, the extension and retraction of the push rod can be achieved by rotating the motor in one direction. This solves the problem of motor damage caused by prolonged forward and reverse rotation, reduces motor requirements and costs, and extends the motor's service life.
Patent Information
- Application Number
- CN202422681522.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-01
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-11-01
AI Technical Summary
Existing electric door opening mechanisms use the forward and reverse rotation of a motor to push out and retract the push rod. Prolonged use can easily damage the motor, and the requirements for the motor are high.
An eccentric gear set is used. The motor rotates in one direction to drive the push rod to extend and retract. The push rod slides back and forth by the meshing motion of the first eccentric gear, the second eccentric gear and the linkage eccentric gear in the eccentric gear set.
It reduces the requirements for the motor, minimizes motor damage, extends the motor's lifespan, and lowers the motor's cost.
Smart Images
Figure CN223838906U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigerator technology, and in particular to an electric door opening mechanism and a refrigerator using the electric door opening mechanism. Background Technology
[0002] Currently, various companies in the home appliance industry are investing in electric door opening technology. The commonly used door opening mechanisms on the market rely on the forward and reverse rotation of a motor to extend and retract a push rod, thus achieving automatic opening and closing. Prolonged forward and reverse rotation places high demands on the motor and can easily damage it.
[0003] Therefore, it is necessary to design an electric door opening mechanism that can achieve both pushing out and retracting without requiring the motor to rotate in either direction. Utility Model Content
[0004] The main purpose of this invention is to propose an electric door opening mechanism and refrigerator, which can achieve the pushing out and retraction of the top rod simply by rotating the motor in one direction, thus avoiding damage to the motor.
[0005] To achieve the above objectives, this utility model proposes an electric door opening mechanism, which includes a housing, a motor, a transmission assembly, and a top rod. The motor, transmission assembly, and top rod are mounted on the housing, and the housing has a slide rail for the top rod to slide on. The transmission assembly includes:
[0006] A transmission gear set is connected to the motor for transmission.
[0007] An eccentric gear set is connected to the transmission gear set. The eccentric gear set includes a first eccentric gear, a second eccentric gear, and a linkage eccentric gear. The first eccentric gear and the second eccentric gear are rotatably mounted on the top rod, and the linkage eccentric gear is rotatably mounted on the housing.
[0008] The linkage eccentric gear includes an upper gear and a third eccentric gear. The upper gear is connected to the transmission gear assembly, and the third eccentric gear meshes with the first eccentric gear and the second eccentric gear. The first eccentric gear and the second eccentric gear are used to drive the push rod to slide back and forth along the slide rail under the rotation of the third eccentric gear, so as to extend and retract the box body.
[0009] In one embodiment, the top rod includes a rod body, a first shaft, and a second shaft; the first shaft and the second shaft are spaced apart on the rod body, and the first eccentric gear and the second eccentric gear are respectively mounted on the first shaft and the second shaft; the rod body has a groove adapted to the slide rail.
[0010] In one embodiment, the box body includes a box bottom and a box cover, and the slide rail is disposed on the box bottom; the box cover has a third shaft for mounting the third eccentric gear, and the third shaft is located between the first shaft and the second shaft.
[0011] In one embodiment, the housing has an opening for the push rod to slide out, and the push rod has a retracted state and an open state;
[0012] When the push rod is in the retracted state, the first shaft and the second shaft are located on the side away from the opening from the corresponding centers of the first eccentric gear and the second eccentric gear, and the third shaft is located on the side close to the opening from the center of the third eccentric gear.
[0013] When the push rod is in the open state, the first shaft and the second shaft are located on the side of the corresponding center of the first eccentric gear and the second eccentric gear close to the opening, and the third shaft is located on the side of the center of the third eccentric gear away from the opening.
[0014] In one embodiment, the first axis, the third axis, and the second axis are located on the same straight line, and the straight line is parallel to the direction of sliding of the push rod.
[0015] In one embodiment, the first eccentric gear, the second eccentric gear, and the third eccentric gear have the same eccentricity.
[0016] In one embodiment, the electric door opening mechanism further includes a latch cover mounted on the end of the top rod; and / or, the latch cover is made of rubber material.
[0017] In one embodiment, the transmission gear includes a meshing turbine and a reduction gear assembly, the turbine being connected to the motor, and the reduction gear assembly meshing with the upper gear.
[0018] In one embodiment, the electric door opening mechanism further includes a control board connected to the motor, the control board being used to control the operation of the motor.
[0019] This utility model also proposes an electric door opening mechanism, including a housing, a motor, a transmission assembly, and a top rod. The motor, transmission assembly, and top rod are mounted on the housing, and the top rod is slidably disposed on the housing. The housing has an opening for the top rod to slide out. The electric door opening mechanism further includes:
[0020] The first eccentric gear is rotatably mounted on the top rod via the first shaft;
[0021] The second eccentric gear is rotatably mounted on the top rod via the second shaft;
[0022] A linkage eccentric gear is rotatably mounted on the housing via a third shaft, including an upper gear and a third eccentric gear. The upper gear is connected to the transmission assembly, and the third eccentric gear is disposed between the second eccentric gear and the third eccentric gear.
[0023] The third eccentric gear meshes with both the first and second eccentric gears; the push rod has a retracted state and an open state.
[0024] When the push rod is in the retracted state, the first shaft and the second shaft are located on the side away from the opening from the corresponding centers of the first eccentric gear and the second eccentric gear, and the third shaft is located on the side close to the opening from the center of the third eccentric gear.
[0025] When the push rod is in the open state, the first shaft and the second shaft are located on the side of the corresponding center of the first eccentric gear and the second eccentric gear close to the opening, and the third shaft is located on the side of the center of the third eccentric gear away from the opening.
[0026] This utility model also proposes a refrigerator, including the above-mentioned electric door opening mechanism.
[0027] The electric door opening mechanism of this utility model uses an eccentric gear set to enable the motor to rotate in one direction, driving the push rod to extend and retract, which is less likely to damage the motor and reduces the requirements for the motor. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0029] Figure 1 A schematic diagram of a structural embodiment of the electric door opening mechanism provided by this utility model;
[0030] Figure 2 A partial structural schematic diagram of an embodiment of the electric door opening mechanism provided by this utility model;
[0031] Figure 3 A schematic diagram of the retracted state structure of an embodiment of the electric door opening mechanism provided by this utility model;
[0032] Figure 4 A schematic diagram of the ejection position structure of an embodiment of the electric door opening mechanism provided by this utility model;
[0033] Figure 5A schematic diagram of the assembly of the box cover and the linkage eccentric gear set in an embodiment of the electric door opening mechanism provided by this utility model;
[0034] Figure 6 A schematic diagram of the top rod of an embodiment of the electric door opening mechanism provided by this utility model;
[0035] Figure 7 A schematic diagram of the box cover of an embodiment of the electric door opening mechanism provided by this utility model.
[0036] Explanation of icon numbers:
[0037] 100. Electric door opening mechanism; 10. Box body; 11. Slide rail; 12. Box bottom; 13. Box cover; 131. Third shaft; 14. Opening; 20. Motor; 30. Transmission assembly; 31. Transmission gear set; 311. Turbine; 312. Reduction gear set; 32. Eccentric gear set; 321. First eccentric gear; 322. Second eccentric gear; 323. Linkage eccentric gear; 3231. Upper gear; 3232. Third eccentric gear; 40. Top rod; 41. Rod body; 411. Slide groove; 42. First shaft; 43. Second shaft; 50. Cover; 60. Control panel; 70. Mounting component. Detailed Implementation
[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0041] Currently, various companies in the home appliance industry are developing electric door opening technology. Commonly used door opening mechanisms on the market rely on the forward and reverse rotation of a motor to extend and retract the push rod, achieving automatic door opening and closing. Prolonged forward and reverse rotation places high demands on the motor and can easily damage it. Therefore, this application designs an electric door opening mechanism where the internal motor only needs to rotate in one direction, such as forward or reverse, to extend and retract the push rod. This design reduces the demands on the motor during prolonged use and minimizes its risk of damage.
[0042] Please refer to Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of this application provides an electric door opening mechanism 100, including a housing 10, a motor 20, a transmission assembly 30, and a push rod 40. The motor 20, transmission assembly 30, and push rod 40 are all mounted on the housing 10. The housing 10 has a slide rail 11 for sliding the push rod 40. The transmission assembly 30 includes a transmission gear set 31 and an eccentric gear set 32. The transmission gear set 31 is connected to the motor 20, and the eccentric gear set 32 is connected to the transmission gear set 31. The eccentric gear set 32 includes a first eccentric gear 321, a second eccentric gear 322, and a linkage eccentric gear 323. The first eccentric gear 321 and the second eccentric gear 322 are rotatably mounted on the push rod 40, and the linkage eccentric gear 323 is rotatably mounted on the housing 10.
[0043] The linkage eccentric gear 323 includes an upper gear 3231 and a third eccentric gear 3232. The upper gear 3231 is connected to the transmission gear set 31. The third eccentric gear 3232 meshes with both the first eccentric gear 321 and the second eccentric gear 322. The first eccentric gear 321 and the second eccentric gear 322 are used to drive the push rod 40 to slide back and forth along the slide rail 11 under the rotation of the third eccentric gear 3232, so as to extend out of the box 10 and retract.
[0044] Specifically, such as Figure 1-2 As shown, the electric door opening mechanism 100 of this application is applicable to household appliances such as refrigerators, used to open the refrigerator door and automatically retract after opening. The electric door opening mechanism 100 includes a housing 10, a motor 20, a transmission assembly 30, and a push rod 40. The motor 20 is driven by the transmission assembly 30, and the transmission assembly 30 is driven by the push rod 40. The motor 20 provides kinetic energy for the push rod 40 to retract and extend. In use, the motor 20 rotates to drive the transmission assembly 30 to move, and the transmission assembly 30 then drives the push rod 40 to slide back and forth. The motor 20, the transmission assembly 30, and the push rod 40 are all installed inside the housing 10. The push rod 40 is slidably disposed within the housing 10 to extend and retract within the housing 10. The housing 10 has a slide rail 11 for the push rod 40 to slide. The push rod 40 slides back and forth along the slide rail 11 under the drive of the motor 20. It should be noted that the push rod 40 can be partially located inside the box body 10 and partially extend outside the box body 10; or it can be entirely located inside the box body 10. In this embodiment, a portion of the push rod 40 is located outside the box body 10.
[0045] like Figure 2 As shown, the transmission assembly 30 includes a transmission gear set 31 and an eccentric gear set 32. The motor 20 is connected to the transmission gear set 31, and the transmission gear set 31 is connected to the eccentric gear set 32. In use, the motor 20 rotates to drive the transmission gear set 31, which in turn drives the eccentric gear set 32 to rotate. Finally, the eccentric gear set 32 drives the push rod 40 to slide back and forth along the slide rail 11 to retract and extend the housing 10.
[0046] like Figure 2 and Figure 5As shown, the eccentric gear set 32 includes a first eccentric gear 321, a linkage eccentric gear 323, and a second eccentric gear 322. The first eccentric gear 321 and the second eccentric gear 322 are rotatably mounted on the push rod 40, while the linkage eccentric gear 323 is rotatably mounted on the housing 10. The linkage eccentric gear 323 includes an upper gear 3231 and a third eccentric gear 3232. The upper gear 3231 and the third eccentric gear 3232 move synchronously; that is, when the upper gear 3231 rotates around its center, the third eccentric gear 3232 also rotates around the center of the upper gear 3231. The upper gear 3231 is connected to the transmission gear set 31, and the third eccentric gear 3232 meshes with both the first eccentric gear 321 and the second eccentric gear 322. In this embodiment, since the first eccentric gear 321 and the second eccentric gear 322 are mounted on the push rod 40, and the third eccentric gear 3232 is mounted inside the housing 10, the distance between the first eccentric gear 321 and the second eccentric gear 322 is fixed. However, the distance between the eccentric shafts of the third eccentric gear 3232 and the first eccentric gear 321 and the second eccentric gear 322 will change with the rotation of the third eccentric gear 3232. Therefore, when the third eccentric gear 3232 rotates, it can drive the first eccentric gear 321 and the second eccentric gear 322 to move relative to the third eccentric gear 3232. Since the first eccentric gear 321 and the second eccentric gear 322 are mounted on the push rod 40, the push rod 40 also slides back and forth along the slide rail 11 inside the housing 10 with the rotation of the third eccentric gear 3232, so as to extend out of the housing 10 and retract into the housing 10. Because this application uses a first eccentric gear 321, a second eccentric gear 322 and a third eccentric gear 3232 that mesh with each other, the motor 20 can rotate in one direction to realize the back-and-forth sliding of the push rod 40, thereby realizing the automatic extension and retraction of the push rod 40, so as to push out the door and automatically retract to the initial position.
[0047] In this implementation, the motor 20 only needs to rotate in one direction, unlike commercially available solutions. Commercial solutions involve the motor 20 rotating forward to extend the push rod 40 and rotating backward to retract it, or vice versa. In these door opening device solutions, the motor 20 needs to alternate between forward and reverse rotation during operation, which can damage the motor 20 over time, affecting its lifespan and placing high demands on it. This application only requires forward or reverse rotation to extend and retract the push rod 40, eliminating the need for alternating forward and reverse rotation. This reduces wear and tear on the motor 20, extends its lifespan, lowers the requirements for the motor, and reduces its cost.
[0048] In an optional embodiment, such as Figure 6As shown. The push rod 40 includes a rod body 41, a first shaft 42, and a second shaft 43. The first shaft 42 and the second shaft 43 are spaced apart on the rod body 41. A first eccentric gear 321 and a second eccentric gear 322 are respectively mounted on the first shaft 42 and the second shaft 43, so that the first eccentric gear 321 can rotate on the first shaft 42, and the second eccentric gear 322 can rotate on the second shaft 43. The rod body 41 has a groove 411 adapted to the slide rail 11. The slide rail 11 is a linear track, and the slide rail 11 is installed in the groove 411 to slide the push rod 40 inside the housing 10. Specifically, the rod body 41 is elongated and has two opposing surfaces. One of the surfaces is provided with a groove 411. The groove 411 is used to adapt to the slide rail 11 on the housing 10, so that the rod body 41 can slide back and forth along the slide rail 11 under the action of external force. The number of slide rails 11 and slide grooves 411 is the same. In this embodiment, for the sake of sliding stability, the number of slide rails 11 and slide grooves 411 is set to two, with the two slide rails 11 spaced apart. The size of the slide rails 11 is adapted to the size of the slide grooves 411 so that the rod 41 can slide smoothly along the slide rails 11. A first shaft 42 and a second shaft 43 are provided on the other surface of the rod 41. A first eccentric gear 321 is sleeved on the first shaft 42 so that the first eccentric gear 321 can rotate eccentrically around the first shaft 42. A second eccentric gear 322 is sleeved on the second shaft 43 so that the second eccentric gear 322 can rotate eccentrically around the second shaft 43.
[0049] It should be noted that in some optional embodiments, the first axis 42 and the second axis 43 can be fixed axes. For example... Figure 6 The push rod 40 shown includes an integrally formed rod body 41, a first shaft 42, and a second shaft 43. The push rod 40 can be injection molded integrally. In another optional embodiment, the first shaft 42 and the second shaft 43 can also be rotating shafts. In this case, the first shaft 42, the second shaft 43, and the rod body 41 are assembled into a complete push rod 40. The first shaft 42 is rotatably mounted on the rod body 41, and the second shaft 43 is spaced apart from the first shaft 42 and is also rotatably mounted on the rod body 41.
[0050] like Figure 1 , Figure 2 and 5As shown, the box body 10 includes a box bottom 12 and a box cover 13. A slide rail 11 is disposed on the box bottom 12, and the box cover 13 has a third shaft 131 for mounting a third eccentric gear 3232. The third shaft 131 is located between the first shaft 42 and the second shaft 43. Specifically, the box body 10 includes a box bottom 12 and a box cover 13 assembled as a single unit, forming an integral structure with an internal receiving cavity. The motor 20, the transmission assembly 30, and the push rod 40 are all disposed within the receiving cavity. The slide rail 11 is fixedly disposed on the box bottom 12, and the slide groove 411 of the push rod 40 cooperates with the slide rail 11, allowing the push rod 40 to slide back and forth along the straight line of the slide rail 11. The slide rail 11 can be integrally formed with the box bottom 12, or it can be fixedly mounted on the box bottom 12 through assembly. The third eccentric gear 3232 is rotatably mounted on the box cover 13. The lid 13 has a third shaft 131, and a third eccentric gear 3232 is fitted onto the third shaft 131 so that the third eccentric gear 3232 can rotate around the third shaft 131. When the bottom 12 and the lid 13 are assembled together, the third shaft 131 is located between the first shaft 42 and the second shaft 43.
[0051] like Figure 7 As shown, the third shaft 131 can be set as a fixed shaft. In the embodiment shown, the box cover 13 is an injection-molded plastic part. The third shaft 131 and the box cover 13 are integrally formed. By sleeved on the third shaft 131, the third eccentric gear 3232 can rotate eccentrically around the third shaft 131. The third shaft 131 can also be provided as a rotating shaft. In this case, the third shaft 131 and the box cover 13 are an assembly. The third shaft 131 is assembled on the box bottom 12 so that the third shaft 131 can rotate freely. Both structures can enable the third eccentric gear 3232 to rotate normally and freely. The specific choice can be made according to actual needs and is not limited here. The third shaft 131 is set between the first shaft 42 and the second shaft 43, so that the first eccentric gear 321 and the second eccentric gear 322 are set on both sides of the third eccentric gear 3232.
[0052] It should be noted that, in some optional embodiments, the upper gear 3231 and the third eccentric gear 3232 can be configured as an integral structural component, so that the upper gear 3231 and the third eccentric gear 3232 can rotate synchronously around the central axis of the upper gear 3231. In other optional embodiments, the upper gear 3231 and the third eccentric gear 3232 can also be configured as separate components, as long as they can rotate synchronously around the central axis of the upper gear 3231. For example, the third shaft 131 is a rotating shaft structure, and the third shaft 131 is a flat shaft. Positioning structures that are positioned on the upper gear 3231 and the third eccentric gear 3232 to correspond to the flat shaft can be provided, thus enabling the upper gear 3231 and the third eccentric gear 3232 to rotate synchronously. In another optional embodiment, the upper gear 3231 and the third shaft 131, and the third eccentric gear 3232 and the third shaft 131 can also be connected by a key.
[0053] like Figure 3 and Figure 4 As shown, the housing 10 has an opening 14 for the push rod 40 to slide out. The push rod 40 has a retracted state inside the housing 10 and an extended state outside the housing 10. When the push rod 40 is in the retracted state, the first shaft 42 and the second shaft 43 are located on the side away from the opening 14 corresponding to the centers of the first eccentric gear 321 and the second eccentric gear 322, and the third shaft 131 is located on the side near the opening 14 corresponding to the center of the third eccentric gear 3232. When the push rod 40 is in the extended state, the first shaft 42 and the second shaft 43 are located on the side near the opening 14 corresponding to the centers of the first eccentric gear 321 and the second eccentric gear 322, and the third shaft 131 is located on the side away from the opening 14 corresponding to the center of the third eccentric gear 3232. Specifically, the push rod 40 slides back and forth inside the housing 10 to perform retraction and extension operations. The push rod 40 is in the retracted state when it is retracted to its innermost position, and in the extended state when it is extended to its outermost position outside the housing 10. The retracted state corresponds to the position of lever 40 when the door is closed, and the open state corresponds to the position of lever 40 when the door is fully open. For example... Figure 3 As shown, in this embodiment, the opening 14 through which the push rod 40 extends is located on the right side. When the push rod 40 is in the retracted state, it is recessed into the housing 10. The first shaft 42 is located at the leftmost side of the center O1 of the first eccentric gear 321, the second shaft 43 is located at the leftmost side of the center O2 of the second eccentric gear 322, and the third shaft 131 is located at the rightmost side of the center O3 of the third eccentric gear 3232. Figure 4 As shown, the push rod 40 is in the open state at this time, that is, the push rod 40 extends as far as possible outside the box 10. At this time, the first shaft 42 is located at the rightmost side of the center O1 of the first eccentric gear 321, the third shaft 131 is located at the leftmost side of the center O3 of the third eccentric gear 3232, and the second shaft 43 is located at the rightmost side of the center O2 of the second eccentric gear 322.
[0054] In this embodiment, the first shaft 42, the third shaft 131, and the second shaft 43 are all arranged on a straight line, and this straight line is parallel to the sliding direction of the push rod 40. When the push rod 40 is in the retracted state, the difference between the distance between the first shaft 42 and the third shaft 131 and the distance between the third shaft 131 and the second shaft 43 is the same. It can be understood that the straight line containing the first shaft 42, the second shaft 43, and the third shaft 131 can also be set at an angle to the sliding direction of the push rod 40; in this case, the push rod 40 also slides along the slide rail 11. The specific stroke of the push rod 40 is related to the value of the angle. When the angle is 0 (i.e., the straight line containing the first shaft 42, the second shaft 43, and the third shaft 43 is in the same sliding direction as the push rod 40), the stroke of the push rod 40 is the longest. This embodiment uses an eccentric gear set 32 to drive the push rod 40 to slide. Since the first eccentric gear 321, the second eccentric gear 322, and the third eccentric gear 3232 are in circular motion, the speed brought by the third eccentric gear 3232 is the speed in the tangential direction of the circle. like Figure 3 and Figure 4 As shown, in the retracted and open states, the speed brought by the third eccentric gear 3232 is perpendicular to the push rod 40, moving downwards or upwards. Since the push rod 40 moves horizontally, its speed is zero in both states. During the transition from the retracted to the open state, the speed of the push rod 40 gradually increases from zero and then gradually decreases back to zero. The speed of the push rod 40 is at its maximum when the third eccentric gear 3232 rotates to 90 degrees, and it reaches zero when it rotates to 180 degrees. Subsequently, as the third eccentric gear 3232 continues to rotate, the push rod 40 returns from the open state to the retracted state. The speed of the push rod 40's retraction is at its maximum when the third eccentric gear 3232 rotates to 270 degrees, and it returns to the retracted state when it rotates to 360 degrees, at which point its speed is zero. Since the speed of the push rod 40 is zero when it retracts and extends to the end, there is no need to set up a buffer component to slow down the speed, which can reduce energy loss and noise.
[0055] The first eccentric gear 321, the second eccentric gear 322, and the third eccentric gear 3232 have the same eccentricity. Specifically, in this embodiment, the first eccentric gear 321, the second eccentric gear 322, and the third eccentric gear 3232 have the same eccentricity, and the root and tip dimensions of the three eccentric gears are all the same, to ensure that the first eccentric gear 321, the second eccentric gear 322, and the third eccentric gear 3232 can always mesh during the movement of the push rod 40, allowing the push rod 40 to move smoothly. It can be understood that the first eccentric gear 321 and the second eccentric gear 322 have the same eccentricity, and the root and tip dimensions of the first eccentric gear 321 and the second eccentric gear 322 are the same; the eccentricity, root, and tip dimensions of the third eccentric gear 3232 can be different from the eccentricity of the first eccentric gear 321.
[0056] In an optional embodiment, such as Figure 2 As shown, the electric door opening mechanism 100 also includes a cover 50, which is installed at the end of the push rod 40, and / or the cover 50 is made of rubber. The end of the push rod 40 extending out of the housing 10 is used to push out the refrigerator door, and a rubber cover 50 is provided at the end of the push rod 40 to protect the refrigerator door.
[0057] Please see Figure 2 As shown, the electric door opening mechanism 100 also includes a control board 60, which is connected to the motor 20 and is used to control the operation of the motor 20. Specifically, a control board 60 is also provided inside the housing 10, and the control board 60 is electrically connected to the motor 20. The control board 60 controls the start and stop of the motor 20, thereby driving the top rod 40 to slide back and forth along the slide rail 11 on the housing 10.
[0058] Please refer to it again. Figure 2 As shown, the transmission gear set 31 includes a meshing turbine 311 and a reduction gear set 312. The turbine 311 is connected to the motor 20, and the reduction gear set 312 meshes with the upper gear 3231. In this embodiment, a mounting component 70 for mounting the turbine 311 is provided inside the housing 10. The mounting component 70 is fixed inside the housing 10 with screws, and then the reduction gear set 312 is used to reduce the speed of the motor 20 to ensure that the speed of the push rod 40 during the sliding process is not too high.
[0059] like Figure 2-4As shown, this application also relates to another electric door opening mechanism 100, which includes a housing 10, a motor 20, a transmission assembly 30, and a push rod 40. The motor 20, transmission assembly 30, and push rod 40 are installed inside the housing 10, and the push rod 40 is slidably disposed in the housing 10. The housing 10 has an opening 14 for the push rod 40 to slide out. The electric door opening mechanism 100 also includes a first eccentric gear 321, a second eccentric gear 322, and a linkage eccentric gear 323. The first eccentric gear 321 is rotatably mounted to the push rod 40 via a first shaft 42, and the second eccentric gear 322 is rotatably mounted to the push rod 40 via a second shaft 43. The linkage eccentric gear 323 is rotatably mounted to the housing 10 via a third shaft 131. The linkage eccentric gear 323 includes an upper gear 3231 and a third eccentric gear 3232. The upper gear 3231 is connected to the transmission assembly 30, and the third eccentric gear 3232 is disposed between the second eccentric gear 322 and the third eccentric gear 3232. The third eccentric gear 3232 meshes with both the first eccentric gear 321 and the second eccentric gear 322.
[0060] The push rod 40 has two states: retracted and extended. When the push rod 40 is in the retracted state, the first shaft 42 and the second shaft 43 are located on the side away from the opening 14, corresponding to the center of the second eccentric gear 322 of the first eccentric gear 321, while the third shaft 131 is located on the side closer to the opening 14, corresponding to the center of the third eccentric gear 3232. When the push rod 40 is in the open state, the first shaft 42 and the second shaft 43 are located on the side closer to the opening 14, corresponding to the centers of the first eccentric gear 321 and the second eccentric gear 322, while the third shaft 131 is located on the side away from the opening 14, corresponding to the center of the third eccentric gear 3232. This application utilizes the rotation of the third eccentric gear 3232 to drive the rotation of the first eccentric gear 321 and the second eccentric gear 322, thereby driving the push rod 40 to realize the push rod 40 pushing the door and retracting process. The structure is simple and the performance is reliable. The extension and retraction of the push rod 40 can be achieved simply by rotating the motor 20 in one direction. This eliminates the need for the motor 20 to rotate in two directions, reducing the demands on and damage to the motor 20, and increasing its lifespan. When the push rod 40 is fully retracted and fully extended, its speed is zero. The speed of the push rod 40 gradually increases from zero and then gradually decreases back to zero. Therefore, no buffer component is needed for deceleration during retraction and extension, reducing energy loss and noise.
[0061] This application also relates to a refrigerator that includes the aforementioned electric door opening mechanism 100.
[0062] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. An electric door opening mechanism, comprising a housing, a motor, a transmission assembly, and a push rod, wherein the motor, transmission assembly, and push rod are mounted on the housing, and the housing has a slide rail for sliding the push rod; characterized in that, The transmission assembly includes: A transmission gear set is connected to the motor for transmission. An eccentric gear set is connected to the transmission gear set. The eccentric gear set includes a first eccentric gear, a second eccentric gear, and a linkage eccentric gear. The first eccentric gear and the second eccentric gear are rotatably mounted on the top rod, and the linkage eccentric gear is rotatably mounted on the housing. The linkage eccentric gear includes an upper gear and a third eccentric gear. The upper gear is connected to the transmission gear assembly, and the third eccentric gear meshes with the first eccentric gear and the second eccentric gear. The first eccentric gear and the second eccentric gear are used to drive the push rod to slide back and forth along the slide rail under the rotation of the third eccentric gear, so as to extend and retract the box body.
2. The electric door opening mechanism as described in claim 1, characterized in that, The top rod includes a rod body, a first shaft, and a second shaft; the first shaft and the second shaft are spaced apart on the rod body, and the first eccentric gear and the second eccentric gear are respectively mounted on the first shaft and the second shaft; the rod body has a groove adapted to the slide rail.
3. The electric door opening mechanism as described in claim 2, characterized in that, The box body includes a box bottom and a box cover, and the slide rail is disposed on the box bottom; the box cover has a third shaft for mounting the third eccentric gear, and the third shaft is located between the first shaft and the second shaft.
4. The electric door opening mechanism as described in claim 3, characterized in that, The housing has an opening for the push rod to slide out, and the push rod has a retracted state and an open state; When the push rod is in the retracted state, the first shaft and the second shaft are located on the side away from the opening from the corresponding centers of the first eccentric gear and the second eccentric gear, and the third shaft is located on the side close to the opening from the center of the third eccentric gear. When the push rod is in the open state, the first shaft and the second shaft are located on the side of the corresponding center of the first eccentric gear and the second eccentric gear close to the opening, and the third shaft is located on the side of the center of the third eccentric gear away from the opening.
5. The electric door opening mechanism as described in claim 2, characterized in that, The first axis, the third axis, and the second axis are located on the same straight line, and the straight line is parallel to the direction of sliding of the push rod.
6. The electric door opening mechanism as described in claim 4, characterized in that, The first eccentric gear, the second eccentric gear, and the third eccentric gear have the same eccentricity.
7. The electric door opening mechanism as described in claim 1, characterized in that, The electric door opening mechanism further includes a latch cover, which is installed at the end of the top rod; and / or, the latch cover is made of rubber material.
8. The electric door opening mechanism as described in claim 1, characterized in that, The transmission gear includes a meshing turbine and a reduction gear assembly. The turbine is connected to the motor, and the reduction gear assembly meshes with the upper gear.
9. The electric door opening mechanism as described in claim 2, characterized in that, The electric door opening mechanism also includes a control board, which is connected to the motor and is used to control the operation of the motor.
10. An electric door opening mechanism, comprising a housing, a motor, a transmission assembly, and a push rod, wherein the motor, transmission assembly, and push rod are mounted on the housing, the push rod is slidably disposed on the housing, and the housing has an opening for the push rod to slide out, characterized in that, The electric door opening mechanism also includes: The first eccentric gear is rotatably mounted on the top rod via the first shaft; The second eccentric gear is rotatably mounted on the top rod via the second shaft; A linkage eccentric gear is rotatably mounted on the housing via a third shaft, including an upper gear and a third eccentric gear. The upper gear is connected to the transmission assembly, and the third eccentric gear is disposed between the second eccentric gear and the third eccentric gear. The third eccentric gear meshes with both the first and second eccentric gears; the push rod has a retracted state and an open state. When the push rod is in the retracted state, the first shaft and the second shaft are located on the side away from the opening from the corresponding centers of the first eccentric gear and the second eccentric gear, and the third shaft is located on the side close to the opening from the center of the third eccentric gear. When the push rod is in the open state, the first shaft and the second shaft are located on the side of the corresponding center of the first eccentric gear and the second eccentric gear close to the opening, and the third shaft is located on the side of the center of the third eccentric gear away from the opening.
11. A refrigerator, characterized in that, Includes the electric door opening mechanism as described in any one of claims 1-10.