Oven door drive

Abstract

The present invention discloses an oven door driver, comprising a housing, a direct-connected reduction motor and a hinge connected to a cover body; a mounting plate is fixedly mounted on one end of the housing, a reduction motor is mounted on the outer end of the mounting plate, and one end of the hinge relative to the reduction motor is hinged to the housing through a hinge shaft; the invention is characterized in that it also comprises a power transmission unit that connects the reduction motor and the hinge to transmit the output power of the reduction motor to the hinge and realizes the hinge flipping; the power transmission unit is installed in the housing through a supporting assembly. The present invention can be opened electrically or manually, and has the advantages of compact structure, large output torque, low noise, stable operation, long service life, etc.

Description

Technical Field

[0001] The invention belongs to the technical field of automatic cover flipping, and in particular relates to an oven door driver which can be opened or closed manually or electrically. Background Art

[0002] With the development of economy and the improvement of people's living standards, people's requirements for household appliances are getting higher and higher, and intelligent and automated products are becoming more and more popular in the current market. When people use devices with lids, such as opening the oven box, lifting the washing machine lid or lifting the toilet lid, they mostly use manual methods, but from the perspective of humanization, more and more automated forms have emerged. The most typical example is the flip-up method of the toilet lid. With the development of automation technology, the degree of intelligence and automation of smart dishwashers, sinks, and washing machines is getting higher and higher. Among them, the automatic flip function is one of the manifestations of smart dishwashers, smart sinks, smart washing machines, and smart ovens.

[0003] The existing flip cover is generally opened manually or by a spring hinge structure. The existing opening method is not intelligent and there are problems such as pinching the hand when flipping the cover.

[0004] To this end, the present invention provides an oven door driver which has a compact structure, large output torque, low noise, stable operation, long service life, and can also realize manual flapping. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides an oven door driver which has a compact structure, large output torque, low noise, stable operation, long service life, and can also realize manual flap.

[0006] The present invention is implemented as follows: an oven door driver comprises a shell, a direct-connected reduction motor and a hinge connected to a cover body; a mounting plate is fixedly mounted on one end of the shell, a reduction motor is mounted on the outer end of the mounting plate, and one end of the hinge relative to the reduction motor is hinged to the shell through a hinge shaft; the driver is characterized in that it also comprises a power transmission unit which connects the reduction motor and the hinge to transmit the output power of the reduction motor to the hinge and realize the flipping of the hinge; the power transmission unit is mounted in the shell through a support assembly.

[0007] The power transmission unit includes a screw-nut pair, the screw of the screw-nut pair is connected to the power output end of the reduction motor, the screw nut of the screw-nut pair is mounted on the other end of the screw, a hinge connection portion is provided on the screw nut near the hinge side, connecting planes for placing hinge driving arms of the hinge are provided on both sides of the hinge connection portion, a through slide groove is provided on the connecting plane, the length of the slide groove is greater than or equal to the linear stroke of the screw nut on the screw when the drive cover body is flipped; a power rod is installed in the slide groove, the power rod passes through the mounting hole on the hinge driving arm and extends out of the shell, a guide groove is provided on the shell corresponding to the slide groove position; the power rod is located in the slide groove; limit caps are provided at both ends of the power rod on the outside of the shell.

[0008] The screw includes a screw segment and a power connector which is an integral structure with the screw segment. The power connector is installed at the power output end of the housing reduction motor through a supporting assembly. A reduction motor output shaft insertion hole is provided in the power connector. The insertion hole and the reduction motor output shaft are provided with power transmission planes which cooperate with each other.

[0009] The support assembly includes support bearings at both ends of the power connector, and the outer circumference of the support bearing is provided with a bearing limit support sleeve, and the bearing limit support sleeve is fixedly connected to the housing through a fastener.

[0010] The hinge includes a hinge driving arm, a cover power rod and a positioning assembly. Two hinge driving arms are provided. One end of the two hinge driving arms is connected to the power transmission unit, and the other end of the hinge driving arm is hinged to the cover power rod. The lower end of the cover power rod is hingedly mounted on the shell, and a positioning assembly is provided between the cover power rod and the power transmission unit.

[0011] The positioning assembly includes a positioning cover plate, which is an integral structure with the two hinge drive arms, and a limit baffle is provided between the two hinge drive arms near the power transmission unit side; a positioning frame that moves along the length direction of the hinge drive arm is installed below the positioning cover plate near the power rod side of the cover body, and the lower end of the positioning frame is hingedly installed between the hinge drive arms on both sides through a rotating shaft; a guide plate is slidably installed on the positioning frame near the power transmission unit side, and the guide plate extends out of the guide groove of the limit baffle; a spring limit platform is provided on the guide plate, and a spring is sleeved on the guide plate between the spring limit platform on the guide plate and the limit baffle An arc-shaped groove is provided at the end of the guide plate in the positioning frame, and a positioning plate driving shaft is provided on the positioning frame in a direction perpendicular to the guide plate corresponding to the position of the arc-shaped groove; a rolling shaft is provided on the positioning frame near the cover body power rod side in a direction perpendicular to the cover body power rod, and a rolling sleeve is installed on the rolling shaft, and an arc-shaped slide groove is provided on the hinge driving arm corresponding to the rolling shaft position, and the ends of the rolling shaft are inserted in the arc-shaped slide grooves of the two hinge driving arms; an opening positioning groove and a closing positioning groove are provided on the cover body power rod near the guide plate side, wherein the opening positioning groove is located at the top, and the opening positioning groove and the closing positioning groove have a smooth arc transition.

[0012] Preferably, an angle sensor for detecting the rotation angle of the hinge is installed at the tail of the motor.

[0013] Preferably, a wear-resistant sleeve is provided on the hinge shaft on which the hinge is installed, and anti-slip grooves are provided on the outer circumferential wall of the wear-resistant sleeve along the axial direction of the wear-resistant sleeve.

[0014] The advantages and positive effects of the present invention are as follows: when assembling the oven door, two hinges are installed, one of which is an active hinge and the other is a driven hinge. A door driver is installed on the active hinge and the other hinge is a driven hinge. The hinge can be flipped around the hinge axis under the drive of the reduction motor, thereby realizing the opening or closing of the oven door. Due to the use of a screw nut matching structure, the rotation angle can be accurately controlled, and after the reduction motor stops running, the driven hinge overcomes the deadweight of the cover plate to prevent the cover body from flipping without constraints, thereby solving the safety hazards of the existing flip cover driver. In addition, when the power is off, the door can be manually closed or opened by using a sliding groove with a through length greater than or equal to the linear travel of the screw nut on the screw when the cover body is flipped, thereby avoiding the defect that manual opening and closing cannot be realized due to the self-locking between the screw nut and the screw. The present invention adopts a power transmission method combining a lever and a connecting mechanism, which has the advantages of compact structure, low noise, large output torque, low energy consumption, stable operation, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a stereogram of the present invention;

[0017] Figure 3 It is a schematic diagram of the internal structure without the shell;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure inside the shell without the shell;

[0019] Figure 5 is a schematic diagram of the shell structure;

[0020] Figure 6 is a schematic diagram of the hinge drive arm structure;

[0021] Figure 7 It is a schematic diagram of the lead screw structure;

[0022] Figure 8 It is a schematic diagram of the screw nut structure;

[0023] Fig. 9 It is a schematic diagram of the installation structure of the positioning component;

[0024] Fig.10 It is a three-dimensional schematic diagram of the positioning component installation structure;

[0025] Fig.11 It is a schematic diagram of the guide plate structure.

[0026] In the figure, 10, housing; 11, mounting plate; 12, guide groove; 20, reduction motor; 30, hinge; 31, hinge driving arm; 32, cover power rod; 320, cover opening positioning groove; 321, closing positioning groove; 40, hinge shaft; 50, power transmission unit; 51, screw nut pair; 510, screw; 5101, screw segment; 5102, power connector; 5103, reduction motor output shaft insertion hole; 5104, power transmission plane; 511, screw nut; 512, hinge Chain connecting part; 513, connecting plane; 514, slide; 52, power rod; 520, limit cap; 60, support assembly; 61, support bearing; 62, bearing limit support sleeve; 70, positioning assembly; 71, positioning cover plate; 72, limit baffle; 73, positioning frame; 74, rotating shaft; 75, guide plate; 76, spring limit table; 77, spring; 78, arc groove; 79, positioning plate drive shaft; 80, rolling shaft; 81, rolling sleeve; 82, arc slide; 90, wear-resistant sleeve; DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] In order to solve the defects of the existing flap device, the present invention particularly relates to an oven door driver with compact structure, large output torque, low noise, stable operation, long service life, and automatic and manual dual functions. To further illustrate the specific structure of the present invention, the following detailed description is made in conjunction with the accompanying drawings.

[0029] See also Figures 1 to 11 : An oven door driver, comprising a shell 10, a direct-connected reduction motor 20 and a hinge 30 connected to a cover body; a mounting plate 11 is fixedly mounted on one end of the shell, the reduction motor 20 is mounted on the outer end of the mounting plate, and one end of the hinge relative to the reduction motor is hinged to the shell 10 through a hinge shaft 40; it also includes a power transmission unit 50 that connects the reduction motor and the hinge to transmit the output power of the reduction motor to the hinge and realize the hinge flipping; the power transmission unit is mounted in the shell 10 through a support assembly 60.

[0030] The power transmission unit 50 includes a screw-nut pair 51, a screw 510 of the screw-nut pair is connected to the power output end of the reduction motor 20, and a screw nut 511 of the screw-nut pair 51 is mounted on the other end of the screw 510. A hinge connection part 512 is provided on the screw nut 511 near the hinge 30 side. Both sides of the hinge connection part are provided with connecting planes 513 for placing the hinge driving arm of the hinge. A through slide groove 514 is provided on the connecting plane. The length of the slide groove is greater than or equal to the linear stroke of the screw nut on the screw when the cover body is driven to flip, so as to ensure that the box door can be closed manually after power failure; a power rod 52 is installed in the slide groove, and the power rod passes through the mounting hole 310 on the hinge driving arm 31 and extends out of the shell. A guide groove 12 is provided on the shell 10 at the corresponding slide groove position; the power rod is located in the slide groove; and limit caps 520 are provided at both ends of the power rod on the outside of the shell.

[0031] The screw 510 includes a screw segment 5101 and a power connector 5102 which is an integral structure with the screw segment. The power connector is installed at the power output end of the housing reduction motor through a support assembly 60. A reduction motor output shaft insertion hole 5103 is provided in the power connector. The insertion hole and the reduction motor output shaft are provided with power transmission planes 5104 that cooperate with each other.

[0032] The support assembly 60 includes support bearings 61 at both ends of the power connector. The outer circumference of the support bearing is provided with a bearing limit support sleeve 62. The bearing limit support sleeve 62 is fixedly connected to the housing 10 through fasteners.

[0033] The above-mentioned hinge belongs to the prior art in the field of oven application. The hinge of the present invention can adopt a purchased hinge or a hinge with the following structure. Specifically, the hinge 30 includes a hinge driving arm 31, a cover power rod 32 and a positioning assembly 70. The hinge driving arm is provided with two, one end of the two hinge driving arms is connected to the power transmission unit 50, and the other end of the hinge driving arm is hinged to the cover power rod 32. The lower end of the cover power rod is hingedly mounted on the shell through a hinge shaft 40. A positioning assembly 70 is provided between the cover power rod and the power transmission unit to prevent the box door from being unconstrained and free in the power-off state.

[0034] The positioning assembly 70 includes a positioning cover plate 71, which is an integral structure with the two hinge drive arms 31, and a limit baffle 72 is provided between the two hinge drive arms near the power transmission unit side; a positioning frame 73 is installed below the positioning cover plate near the power rod side of the cover body, which moves along the length direction of the hinge drive arm, and the lower end of the positioning frame is hingedly installed between the hinge drive arms 31 on both sides through a rotating shaft 74; a guide plate 75 is slidably installed on the positioning frame near the power transmission unit side, and the guide plate extends out of the guide groove 75 of the limit baffle; a spring limit platform 76 is provided on the guide plate, and a spring 73 is sleeved on the guide plate between the spring limit platform on the guide plate and the limit baffle 7. An arc-shaped groove 78 is provided at the end of the guide plate in the positioning frame, and a positioning plate driving shaft 79 is provided on the positioning frame in a direction perpendicular to the guide plate corresponding to the position of the arc-shaped groove; a rolling shaft 80 is provided on the positioning frame near the cover body power rod 32 side in a direction perpendicular to the cover body power rod, and a rolling sleeve 81 is installed on the rolling shaft, and an arc-shaped slide groove 82 is provided on the hinge driving arm corresponding to the position of the rolling shaft, and the ends of the rolling shaft are inserted in the arc-shaped slide grooves of the two hinge driving arms; a cover opening positioning groove 320 and a closing positioning groove 321 are provided on the cover body power rod 32 near the guide plate side, wherein the cover opening positioning groove is located at the top, and there is a smooth arc transition between the cover opening positioning groove and the closing positioning groove.

[0035] An angle sensor for detecting the hinge rotation angle is installed at the tail of the motor. The door opening position is accurately detected by a Hall sensor or an angle sensor. The working principle of the angle sensor belongs to the known technology.

[0036] A wear-resistant sleeve 90 is provided on the hinge shaft for installing the hinge, and anti-slip grooves are provided on the outer circumferential wall of the wear-resistant sleeve along the axial direction of the wear-resistant sleeve to improve the flexibility and service life of the cover power rod 32 in rotating relative to the hinge shaft 40.

[0037] The working principle is that when the power is on, when the box door needs to be opened or closed, the direct-connected reduction motor drives the power transmission unit to move, the screw of the power transmission unit rotates, and the screw nut moves linearly. Driven by the screw nut, the driving force is transmitted to the hinge through the power rod, thereby realizing the opening and closing of the box door connected to the hinge.

[0038] When set to the initial position, the power rod is located at the right end of the slide slot. Figure 3 , at this time, the box door is in a closed state, and the power rod is at the right end of the slide slot. When the opening signal is received, the reduction motor rotates forward, the screw nut moves left, and the screw nut drives the hinge driving arm to move left together through the power rod. The hinge driving arm drives the cover power rod to rotate around the hinge shaft, and the cover power rod gradually moves from the vertical closed state to the horizontal open state; the opening stroke is completed according to the preset pitch stroke, and the oven door is gradually opened; when closed, the reduction motor reverses, the screw nut moves right, and the power rod slides in the slide slot of the hinge connection part until it reaches the left end of the slide slot. At this time, under the action of the power rod, the screw nut begins to drive the hinge driving arm to move right, and the cover power rod rotates in the opposite direction around the hinge shaft, gradually moving from the horizontal open state to the vertical closed state, and completing the closing stroke according to the preset pitch stroke to realize the electric closing of the box door.

[0039] When the power is off, the reduction motor cannot work. Manual force is applied to the door, and the door transmits the force to the power rod through the hinge. The power rod slides from right to left in the slide groove of the hinge connection part, and the door is opened without being self-locked by the screw nut pair. Similarly, the door is closed by applying force in the opposite direction.

[0040] In the above working principle description, it is assumed that the power rod is located at the right end of the slide slot in the initial position, but it is not limited thereto. The power rod may also be located in the middle of the slide slot in the initial position.

[0041] When assembling the oven door, two hinges are installed, one of which is the active hinge and the other is the driven hinge. The door driver is installed on the active hinge, and the other is a high-strength hinge that can bear the weight of the entire door body; it can avoid the door body sliding down when the door is opened electrically due to the slide structure. Driven by the reduction motor, the hinge can be flipped around the hinge axis to open or close the oven door; due to the use of a screw nut matching structure, the rotation angle can be accurately controlled, and after the reduction motor stops running, the driven hinge overcomes the deadweight of the cover plate to prevent the cover body from flipping without constraints, solving the safety hazards of the existing flip cover driver. In addition, when the power is off, the door can be manually closed or opened by utilizing a through-hole provided on the hinge connection part, whose length is greater than or equal to the sliding groove stroke of the screw nut on the screw when driving the cover body to flip, thereby avoiding the defect that manual opening and closing cannot be achieved due to the self-locking between the screw nut and the screw. The present invention adopts a power transmission method combining a lever and a connecting mechanism, which has the advantages of compact structure, low noise, large output torque, low energy consumption, stable operation and long service life.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, for example, the shape of the slide is an arc or an oblong, should be included in the protection scope of the present invention.

Claims

1. An oven door driver, comprising a housing, a direct-connected reduction motor and a hinge connected to a cover; a mounting plate is fixedly mounted on one end of the housing, a reduction motor is mounted on the outer end of the mounting plate, and one end of the hinge relative to the reduction motor is hinged to the housing through a hinge shaft; characterized in that: It also includes a power transmission unit that connects the reduction motor and the hinge to transmit the output power of the reduction motor to the hinge and realize the hinge flipping; the power transmission unit is installed in the housing through a support assembly; The power transmission unit comprises a screw-nut pair, the screw of the screw-nut pair is connected to the power output end of the reduction motor, the screw nut of the screw-nut pair is mounted on the other end of the screw, a hinge connection portion is provided on the screw nut near the hinge side, connecting planes for placing hinge drive arms of the hinge are provided on both sides of the hinge connection portion, a through slide groove is provided on the connecting plane, the length of the slide groove is greater than or equal to the linear stroke of the screw nut on the screw when the cover body is driven to flip; a power rod is installed in the slide groove, the power rod passes through the mounting hole on the hinge drive arm and extends out of the shell, and a guide groove is provided on the shell corresponding to the slide groove position; the power rod is located in the slide groove; limit caps are provided at both ends of the power rod on the outside of the shell; the hinge comprises a hinge drive arm, a cover body power rod and a positioning assembly, the hinge drive arm is provided with two, one end of the two hinge drive arms is connected to the power transmission unit, and the other end of the hinge drive arm is hinged to the cover body power rod, the lower end of the cover body power rod is hingedly mounted on the shell, and a positioning assembly is provided between the cover body power rod and the power transmission unit; The positioning assembly includes a positioning cover plate, which is an integral structure with the two hinge drive arms, and a limit baffle is provided between the two hinge drive arms near the power transmission unit side; a positioning frame that moves along the length direction of the hinge drive arm is installed below the positioning cover plate near the power rod side of the cover body, and the lower end of the positioning frame is hingedly installed between the hinge drive arms on both sides through a rotating shaft; a guide plate is slidably installed on the positioning frame near the power transmission unit side, and the guide plate extends out of the guide groove of the limit baffle; a spring limit platform is provided on the guide plate, and a spring is sleeved on the guide plate between the spring limit platform on the guide plate and the limit baffle An arc-shaped groove is provided at the end of the guide plate in the positioning frame, and a positioning plate driving shaft is provided on the positioning frame in a direction perpendicular to the guide plate corresponding to the position of the arc-shaped groove; a rolling shaft is provided on the positioning frame near the cover power rod side in a direction perpendicular to the cover power rod, and a rolling sleeve is installed on the rolling shaft, and an arc-shaped slide groove is provided on the hinge driving arm corresponding to the position of the rolling shaft, and the ends of the rolling shaft are inserted into the arc-shaped slide grooves of the two hinge driving arms; a cover opening positioning groove and a closing positioning groove are provided on the cover power rod near the guide plate side, wherein the cover opening positioning groove is located at the top, and the arc-shaped transition between the cover opening positioning groove and the closing positioning groove is smooth; The screw includes a screw segment and a power connector which is an integral structure with the screw segment. The power connector is installed at the power output end of the housing reduction motor through a supporting assembly. A reduction motor output shaft insertion hole is provided in the power connector. The insertion hole and the reduction motor output shaft are provided with power transmission planes which cooperate with each other.

2. The oven door driver according to claim 1, characterized in that: The support assembly includes support bearings at both ends of the power connector, and the outer circumference of the support bearing is provided with a bearing limit support sleeve, and the bearing limit support sleeve is fixedly connected to the housing through a fastener.

3. The oven door driver according to claim 1, characterized in that: An angle sensor for detecting the rotation angle of the hinge is installed at the tail of the motor.

4. The oven door driver according to claim 1, characterized in that: A wear-resistant sleeve is arranged on the hinge shaft for installing the hinge, and anti-skid patterns are arranged on the outer circumferential wall of the wear-resistant sleeve along the axial direction of the wear-resistant sleeve.

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