Over-torque protection transmission mechanism, drive mechanism and electric kettle

Abstract

The present invention discloses an over-torque protection transmission mechanism, a driving mechanism and an electric kettle, and belongs to the field of household appliances. The over-torque protection transmission mechanism comprises: a first rotating member, having a circular groove coaxial with the first rotating member, and the inner circumferential surface of the circular groove has a plurality of engaging grooves; a second rotating member, comprising an engaging protrusion, an elastic reset member and a rotating body; the engaging protrusion has a protrusion that can be embedded in the engaging groove; one side of the rotating body is provided with a slideway for the engaging protrusion to fit and slide; the elastic reset member is located in the slideway and pushes the engaging protrusion out; after the protrusion is embedded in the engaging groove, when the torque between the first rotating member and the second rotating member is greater than the engaging force between the protrusion and the engaging groove, the engaging protrusion compresses the elastic reset member to disengage the protrusion from the engaging groove. By connecting the driving device and the driven member through the first rotating member and the second rotating member for transmission, it is possible to avoid excessive torque being transmitted from the driven member to the driving device, thereby preventing damage to the driving device.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular to an over-torque protection transmission mechanism, a driving mechanism and an electric kettle. Background Art

[0002] With the improvement of people's living standards and the acceleration of the pace of life, more and more household appliances have entered consumers' homes to meet people's various needs, and the functions and application scenarios of such household appliances have become increasingly refined to enhance consumers' experience. For example, a water-adding arm is provided on the electric kettle, and the water-adding arm is driven by the rotation of the motor to add water to the kettle. However, in actual use, consumers still have the problem of poor experience. For example, during use, the water-adding arm encounters an obstacle when it rotates (for example, a person holds the water-adding arm with his hand), the motor is stuck and the water-adding arm cannot continue to rotate, which will shorten the service life of the motor or even burn the motor. Summary of the invention

[0003] Based on this, it is necessary to address the above problems. The present invention provides an over-torque protection transmission mechanism, a drive mechanism and an electric kettle, which can prevent the motor from being subjected to excessive torque when rotating, avoid burning of the motor, and extend the service life of the motor.

[0004] The present invention adopts the following technical solutions:

[0005] The over-torque protection transmission mechanism is used to connect the driving device and the driven member, including:

[0006] A first rotating member, used to connect one of the connecting driving device and the driven member, having a circular groove coaxial with the rotation axis of the first rotating member, the inner circumference of the circular groove of the first rotating member having a plurality of fitting grooves, each of the fitting grooves being evenly arranged in a circle around the axis;

[0007] The second rotating member is used to connect the other of the connecting driving device and the driven member, including an engaging protrusion, an elastic reset member and a rotating body coaxial with the circular groove, the rotating body is accommodated in the circular groove and can rotate relative to the first rotating member; the engaging protrusion has a protrusion matching the engaging groove; the rotating body is provided with a slideway for the engaging protrusion to slide; the elastic reset member is located in the slideway and pushes the engaging protrusion out so that the protrusion is embedded in the engaging groove; after the protrusion is embedded in the engaging groove, when the torsional force between the first rotating member and the second rotating member is greater than the engaging force between the protrusion and the engaging groove, the engaging protrusion compresses the elastic reset member to disengage the protrusion from the engaging groove.

[0008] In the existing motor transmission mechanism, the torque applied to the end of the output shaft can be directly transmitted to the motor. When the torque is too large, the motor cannot rotate and the current passing through the motor coil generates a large amount of heat, which shortens the service life of the motor and even burns the motor.

[0009] In the above-mentioned over-torque protection transmission mechanism, the first rotating member and the second rotating member can be respectively connected to the driving device (such as a motor) and the driven member for transmission, and the first rotating member and the second rotating member can rotate synchronously under the interlocking action of the interlocking protrusion and the interlocking groove; when the torque applied by the driving device and the driven member to the first rotating member and the second rotating member is too large (that is, when the driven member hits an obstacle), the interlocking protrusion of the second rotating member retracts to disengage the protruding portion of the interlocking protrusion from the interlocking groove, and the first rotating member and the second rotating member can rotate relative to each other, and the elastic reset member is disengaged again and then pushes the interlocking protrusion into the interlocking groove. If the torque is still greater than the interlocking force at this time, the interlocking protrusion retracts again to disengage the protruding portion from the interlocking groove, and so on and so forth until the torque is less than or equal to the interlocking force. During the whole process, the first rotating member and the driving device can keep rotating all the time to prevent the excessive torque from causing the driving device to stop rotating and shortening the service life of the motor, or even burning the motor.

[0010] In one of the embodiments, a limiting protrusion is provided at the exit of the slideway, and the limiting protrusion forms a limiting channel through which only the protrusion can extend, thereby preventing the engaging protrusion from escaping from the slideway and limiting the engaging protrusion.

[0011] In one embodiment, the rotating body includes a rotating upper cover and a rotating lower cover that is fitted and fixed with the rotating upper cover; the rotating upper cover and the rotating lower cover are both provided with slots on opposite sides; after the rotating upper cover and the rotating lower cover are fitted and fixed, the two slots are combined to form the slideway. The rotating upper cover and the rotating lower cover can be detachably connected and fixed by screws, which is convenient for the elastic reset part and the engaging protrusion.

[0012] In one embodiment, the projection of the fitting groove on the vertical plane of the rotation axis is a major arc or semicircular shape. The major arc or semicircular fitting groove is relatively smooth, which can facilitate the matching protrusion to slip and separate when subjected to a large torque.

[0013] In one embodiment, the engaging groove is a hemispherical groove; the protrusion is a hemispherical body that matches the engaging groove. The assembly of the hemispherical groove and the hemispherical protrusion is relatively smooth, which facilitates pushing back the engaging protrusion and compressing the elastic reset member when the torque is large.

[0014] In one embodiment, the rotating body and the first rotating member are both provided with openings for the water supply pipeline to pass through.

[0015] The present invention also discloses a driving mechanism, including the above-mentioned over-torque protection transmission mechanism, and further comprising:

[0016] a driving device connected to the first rotating member and driving the first rotating member to rotate, or connected to the rotating body and driving the rotating body to rotate; the driving device may be a motor;

[0017] The fixed support fixes the driving device and has a cavity for the first rotating member and the second rotating member to rotate.

[0018] The above-mentioned driving mechanism adopts an over-torque protection transmission mechanism, which can prevent the driving device connected to the input shaft from burning due to excessive torque.

[0019] In one embodiment, the fixed support includes a fixed bracket for fixing the driving device, a support upper cover fixed to the fixed bracket, and a support lower cover fixed to the support upper cover in cooperation with the support upper cover; the cavity is formed between the support upper cover and the support lower cover.

[0020] In one of the embodiments, the support upper cover and the support lower cover are detachably connected and fixed by snaps, so as to facilitate the installation of the first rotating member and the second rotating member.

[0021] The present invention also discloses an electric kettle, comprising the above-mentioned driving mechanism, and further comprising:

[0022] Pot body;

[0023] A heating base having a kettle body heating portion for heating the kettle body;

[0024] The water-adding rotating arm comprises a water-adding column arranged on the heating base and a rotating arm rotatably mounted on the upper end of the water-adding column; the fixed support is fixed on the water-adding column, and the rotating axis of the first rotating member coincides with the rotating axis of the rotating arm; one of the rotating body and the first rotating member that is not connected to the driving device is fixedly connected to the rotating arm;

[0025] A water supply pipeline extends from the heating base through the water supply column to the inside of the rotating arm and forms a water outlet at the end of the rotating arm;

[0026] The control main board is electrically connected to the kettle body heating part, the driving device and the water adding pipeline respectively.

[0027] In the above-mentioned electric kettle, a driving mechanism with an over-torque protection transmission mechanism is used to realize the rotation of the water-adding rotating arm, which can prevent the water-adding rotating arm from hitting obstacles during rotation and causing the driving device to burn out.

[0028] In one embodiment, the rotating body or the first rotating member has a plug-in portion connected to the rotating arm; the rotating arm has a plug-in hole for the plug-in portion to be inserted and fixed; the fixed support is provided with an avoidance groove for the plug-in portion to pass through and rotate around the rotating axis of the rotating body. The connection between the rotating body and the rotating arm is achieved by means of the plug-in portion and the plug-in hole.

[0029] In one embodiment, the electric kettle further comprises:

[0030] A position sensor is provided, wherein the position of the position sensor corresponding to the position of the kettle body heating part is fixed on the water adding column; the position sensor is electrically connected to the control main board;

[0031] The trigger structure is arranged on the rotating arm to trigger the in-position sensor; when the water inlet is located above the heating part of the kettle body, the trigger structure triggers the in-position sensor. By arranging the in-position sensor, the position where the rotating arm stops adding water after rotating can be accurately controlled.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] In the over-torque protection transmission mechanism of the present invention, the driving device (such as a motor) and the driven member can be connected for transmission through the first rotating member and the second rotating member, and the first rotating member and the second rotating member can rotate synchronously under the interlocking action of the interlocking protrusion and the interlocking groove; when the torque applied by the driving device and the driven member to the first rotating member and the second rotating member is too large (that is, when the driven member encounters an obstacle), the interlocking protrusion of the second rotating member retracts to disengage the raised portion of the interlocking protrusion from the interlocking groove. At this time, the first rotating member and the second rotating member can rotate relative to each other, and the first rotating member and the driving device can keep rotating all the time, preventing excessive torque from shortening the life of the driving device or even burning it.

[0034] The drive mechanism of the present invention adopts the above-mentioned over-torque protection transmission mechanism, which can prevent the drive device connected to the input shaft from burning due to excessive torque.

[0035] The electric kettle of the present invention adopts the driving mechanism to drive the rotating arm to add water, which can avoid the burning of the driving device due to excessive torque caused by obstacles when adding water. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The technology of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0037] Figure 1 is an exploded schematic diagram of the over-torque protection transmission mechanism of the present invention;

[0038] Figure 2 is a cross-sectional view of the over-torque protection transmission mechanism of the present invention when viewed from the side;

[0039] Figure 3 is a cross-sectional view of the over-torque protection transmission mechanism of the present invention when viewed from above;

[0040] Figure 4 is an exploded schematic diagram of the drive mechanism of the present invention;

[0041] Figure 5 is a cross-sectional view of the drive mechanism of the present invention when viewed from the side;

[0042] Figure 6 It is a schematic diagram of an explosion of the electric kettle of the present invention;

[0043] Figure 7 is a cross-sectional view of a water adding rotating arm of an electric kettle of the present invention when viewed from the side;

[0044] Figure 8 is a cross-sectional view of the water adding rotating arm of the electric kettle of the present invention when viewed from above;

[0045] Fig. 9 It is a schematic diagram of the water adding rotating arm of the electric kettle of the present invention in two working positions and a standby position.

[0046] Reference numerals:

[0047] 1-over-torque protection transmission mechanism; 11-first rotating member; 111-circular groove; 112-engaging groove; 12-second rotating member; 121-engaging convex member; 1211-convex portion; 122-elastic reset member; 123-rotating body; 1231-slideway; 1232-limiting convex portion; 1233-limiting channel; 1234-rotating upper cover; 1235-rotating lower cover; 1236-slot; 1237-plug-in portion;

[0048] 2-driving mechanism; 21-driving device; 22-fixed support; 221-cavity; 222-fixed bracket; 223-support upper cover; 224-support lower cover; 225-buckle; 226-avoidance groove;

[0049] 3-electric kettle; 31-kettle body; 32-heating base; 33-water adding arm; 331-water adding column; 332-rotating arm; 34-in-place sensor; 35-trigger structure, 36-disinfection container;

[0050] 4-Open your mouth. DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0052] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0054] The over-torque protection transmission mechanism is used to connect the driving device and the driven member, and comprises a first rotating member and a second rotating member.

[0055] The first rotating member and the second rotating member are used to connect the driving device and the driven member respectively. The first rotating member can be connected to the driving device and the second rotating member can be connected to the driven member; or the second rotating member can be connected to the driving device and the first rotating member can be connected to the driven member.

[0056] The first rotating member has a circular groove coaxial with the rotation axis of the first rotating member, and the inner circumference of the circular groove of the first rotating member has a plurality of embedded grooves, and the embedded grooves are evenly arranged in a circle around the axis;

[0057] The second rotating member includes an engaging protrusion, an elastic reset member and a rotating body coaxial with the circular groove, the rotating body is received in the circular groove and can rotate relative to the first rotating member; the engaging protrusion has a protrusion matching the engaging groove; a slideway for the engaging protrusion to slide in a radial direction corresponding to the position of the engaging groove is provided on a side of the rotating body opposite to the inner circumferential surface; the elastic reset member is located in the slideway and pushes the engaging protrusion out so that the protrusion exceeds the slideway and is embedded in the engaging groove. The elastic reset member can be a compression spring or a spring sheet.

[0058] After the protrusion is embedded in the embedding groove, when the torque between the first rotating member and the second rotating member is greater than the embedding force between the protrusion and the embedding groove, the embedding convex member compresses the elastic reset member to disengage the protrusion from the embedding groove.

[0059] In the above-mentioned over-torque protection transmission mechanism, the first rotating member and the second rotating member can be respectively connected to the driving device (such as a motor) and the driven member for transmission, and the first rotating member and the second rotating member can rotate synchronously under the interlocking action of the interlocking protrusion and the interlocking groove; when the torque applied by the driving device and the driven member to the first rotating member and the second rotating member is too large (that is, when the driven member hits an obstacle), the interlocking protrusion of the second rotating member retracts to disengage the protruding portion of the interlocking protrusion from the interlocking groove, and the first rotating member and the second rotating member can rotate relative to each other, and the elastic reset member is disengaged again and then pushes the interlocking protrusion into the interlocking groove. If the torque is still greater than the interlocking force at this time, the interlocking protrusion retracts again to disengage the protruding portion from the interlocking groove, and so on and so forth until the torque is less than or equal to the interlocking force. During the whole process, the first rotating member and the driving device can keep rotating all the time, preventing the driving device from stopping rotating due to excessive torque, extending the service life of the driving device, and avoiding the burning of the motor.

[0060] Preferably, the engaging protrusions, the elastic return members and the slideways may be provided in multiple groups, for example, 3 groups, namely 3 engaging members, 3 elastic return members and 3 slideways.

[0061] Preferably, a limiting convex portion is provided at the exit of the slideway, and the limiting convex portion forms a limiting channel through which only the protrusion can extend, thereby preventing the engaging protrusion from escaping from the slideway and playing a limiting role for the engaging protrusion.

[0062] Specifically, the rotating body includes a rotating upper cover and a rotating lower cover that is fixed with the rotating upper cover; the rotating upper cover and the rotating lower cover are provided with grooves on opposite sides; after the rotating upper cover and the rotating lower cover are fixed, the two grooves are combined to form the slideway. The rotating upper cover and the rotating lower cover can be detachably connected and fixed by screws, which is convenient for the elastic reset part and the engaging convex part of the case.

[0063] The projection of the fitting groove on the vertical plane of the rotation axis is a major arc or a semicircle. The fitting groove of the major arc or semicircle is relatively smooth, which can facilitate the sliding and separation of the protrusion matched therewith when subjected to a large torque.

[0064] Specifically, the engaging groove is a hemispherical groove; the protrusion is a hemispherical body adapted to the engaging groove. The assembly of the hemispherical groove and the protrusion of the hemispherical body is relatively smooth, which facilitates pushing back the engaging protrusion and compressing the elastic reset member when the torque is large.

[0065] Preferably, the rotating body and the first rotating member are both provided with openings for the water filling pipeline to pass through, and each opening is arranged as an arc-shaped opening, and the axis of the opening is coaxial with the rotation axis of the first rotating member. This is a design made for the electric kettle, which facilitates the installation of the water filling pipeline of the electric kettle.

[0066] The present invention also discloses a driving mechanism, including the above-mentioned over-torque protection transmission mechanism, and further comprising:

[0067] a driving device connected to the first rotating member and driving the first rotating member to rotate, or connected to the rotating body and driving the rotating body to rotate; the driving device may be a motor, and if the driving device is connected to the first rotating member, the rotating body is connected to the driven member; if the driving device is connected to the rotating body, the first rotating member is connected to the driven member;

[0068] The fixed support fixes the driving device and has a cavity for the first rotating member and the second rotating member to rotate.

[0069] The above-mentioned driving mechanism adopts an over-torque protection transmission mechanism, which can prevent the driving device connected to the input shaft from burning due to excessive torque.

[0070] Specifically, the fixed support includes a fixed bracket for fixing the driving device, a support upper cover fixed to the fixed bracket, and a support lower cover fixed to the support upper cover in cooperation with the support upper cover; the cavity is formed between the support upper cover and the support lower cover.

[0071] Preferably, the support upper cover and the support lower cover are detachably connected and fixed by means of buckles, so as to facilitate the installation of the first rotating member and the second rotating member.

[0072] The invention also discloses an electric kettle, comprising the above-mentioned driving mechanism, and also comprising: a kettle body, a sterilizing container, a heating base, a water-adding rotating arm, a water-adding pipeline and a control mainboard.

[0073] Among them, the heating base has a kettle body heating part for heating the kettle body and a sterilization heating part for heating the sterilization container. It can be understood that both the kettle body heating part and the sterilization heating part are provided with electric heaters, or the electric heaters are located at the bottom of the kettle body and the bottom of the sterilization container, while the kettle body heating part and the sterilization heating part are provided with corresponding power supply couplers.

[0074] The water-adding rotating arm includes a water-adding column arranged on the heating base and a rotating arm rotatably mounted on the upper end of the water-adding column; the fixed support is fixed on the water-adding column, and the rotation axis of the first rotating member coincides with the rotation axis of the rotating arm; and one of the rotating body and the first rotating member that is not connected to the driving device is fixedly connected to the rotating arm.

[0075] The water supply pipe extends from the heating base through the water supply column into the rotating arm and forms a water outlet at the end of the rotating arm.

[0076] The control main board is electrically connected to the kettle body heating part, the driving device and the water adding pipeline respectively, and is used to control the heating of the heating base, the rotation of the rotating arm and the opening / closing of the valve of the water adding pipeline.

[0077] In the above-mentioned electric kettle, a driving mechanism with an over-torque protection transmission mechanism is used to realize the rotation of the water-adding rotating arm, which can prevent the water-adding rotating arm from hitting obstacles during rotation and causing the driving device to burn out.

[0078] Specifically, the rotating body or the first rotating member has a plug-in portion for connecting with the rotating arm; the rotating arm has a plug-in hole for the plug-in portion to be inserted and fixed; the fixed support is provided with an avoidance groove for the plug-in portion to pass through and rotate around the rotation axis of the rotating body, and the avoidance groove is an arc groove corresponding to the rotation path of the plug-in portion. Specifically, the plug-in portion is a plug pin extending from the bottom of the rotating body, and the plug-in hole is a pin hole matching the plug pin. The connection between the rotating body and the rotating arm is achieved by means of the plug-in portion and the plug-in hole. The number of the plug pin and the plug-in hole can be one, two or even more than two, as long as the rotating body and the rotating arm can rotate synchronously.

[0079] Preferably, the electric kettle further comprises:

[0080] Two in-place sensors, each of which corresponds to the position of the kettle body heating part and the disinfection heating part and is fixed on the water adding column; each of the in-place sensors is electrically connected to the control mainboard;

[0081] The trigger structure is arranged on the rotating arm to trigger the in-place sensor; when the water inlet is located above the heating part of the kettle body, the trigger structure triggers each in-place sensor. By arranging the in-place sensor, the position where the rotating arm stops adding water after rotating can be accurately controlled.

[0082] Specifically, the in-position sensor can adopt an infrared sensor, which has a transmitting end and a receiving end, and the transmitting end and the receiving end are arranged opposite to each other; a strip baffle extends from the rotating arm, and the trigger structure is a hole on the baffle. The baffle is located between the transmitting end and the receiving end during the rotation process, and the light signal between the transmitting end and the receiving end is blocked. When the hole is rotated between the transmitting end and the receiving end, there is no obstruction between the transmitting end and the receiving end, thereby triggering the in-position information.

[0083] When in use, the two positions where the rotating arm is used to add water at the disinfection heating part and the kettle body heating part are the working positions, and the position between the disinfection heating part and the kettle body heating part is the standby position. The angle between the two working positions and the rotation axis of the rotating arm is 144°. After adding water, the valve is closed, and the control mainboard controls the drive device to start rotating for a few seconds, so that the rotating arm roughly returns to the standby position between the two working positions. Since water does not need to be added during standby, its position accuracy does not need to be considered, and it can be controlled only by its rotation time; while in the working position, the position accuracy needs to be controlled to prevent water injection deviation, so in-position sensors are set corresponding to the two working positions.

[0084] Example 1

[0085] The over-torque protection transmission mechanism 1 is used to connect the driving device and the driven member, and comprises a first rotating member 11 and a second rotating member 12. The first rotating member 11 and the second rotating member 12 are used to connect the driving device 21 and the driven member respectively.

[0086] The first rotating member 11 has a circular groove 111 coaxial with the rotation axis of the first rotating member 11, and the inner circumferential surface of the circular groove of the first rotating member 11 has a plurality of embedded grooves 112, and the embedded grooves 112 are evenly arranged in a circle around the axis;

[0087] The second rotating member 12 includes an engaging protrusion 121, an elastic reset member 122 and a rotating body 123 coaxial with the circular groove 111. The rotating body 123 is received in the circular groove 111 and can rotate relative to the first rotating member 11. The engaging protrusion 121 has a protrusion 1211 that can be embedded in the engaging groove 112, that is, the shape of the protrusion 1211 matches the engaging groove 112. A slideway 1231 is radially provided on a side of the rotating body 123 opposite to the inner circumferential surface corresponding to the position of the engaging groove 112, and the engaging protrusion 121 can slide against the slideway 1231. The elastic reset member 122 is located in the slideway 1231 and pushes the engaging protrusion 121 out so that the protrusion 1211 exceeds the slideway 1231 and is embedded in the engaging groove 112. The elastic reset member 122 can be a compression spring or a spring sheet.

[0088] After the protrusion 1211 is embedded in the embedding groove 112, when the torque between the first rotating member 11 and the second rotating member 12 is greater than the embedding force between the protrusion 1211 and the embedding groove 112, the embedding protrusion 121 compresses the elastic reset member 122 to disengage the protrusion 1211 from the embedding groove 112.

[0089] In the above-mentioned over-torque protection transmission mechanism 1, the first rotating member 11 and the second rotating member 12 can be respectively connected to the driving device 21 (such as a motor) and the driven member for transmission, and the first rotating member 11 and the second rotating member 12 can rotate synchronously under the engagement of the engagement protrusion 121 and the engagement groove 112; when the torque applied between the driving device 21 and the driven member to the first rotating member 11 and the second rotating member 12 is too large (that is, when the driven member encounters an obstacle), the second rotating member 12 The engaging protrusion 121 retracts to disengage the protruding portion 1211 of the engaging protrusion 121 from the engaging groove 112. At this time, the first rotating member 11 and the second rotating member 12 can rotate relatively, and the elastic reset member 122 disengages again and pushes the engaging protrusion 121 into the engaging groove 112. If the torque is still greater than the engaging force at this time, the engaging protrusion 121 retracts again to disengage the protruding portion 1211 from the engaging groove 112, and repeats this process until the torque is less than or equal to the engaging force. During the whole process, the first rotating member 11 and the driving device 21 can keep rotating to prevent the driving device 21 from stopping rotating and burning due to excessive torque.

[0090] The engaging protrusion 121 , the elastic return member 122 and the slideway 1231 may be provided in multiple groups, for example, 3 groups, namely 3 engaging members, 3 elastic return members 122 and 3 slideways 1231 .

[0091] A limiting protrusion 1232 is provided at the exit of the slideway 1231, and the limiting protrusion 1232 forms a limiting channel 1233 that only allows the protrusion 1211 to extend, which can prevent the engaging protrusion 121 from escaping from the slideway 1231 and limit the engaging protrusion 121. The engaging protrusion 121 is a cylinder, and the protrusion 1211 is arranged at one end of the cylinder and is arranged coaxially. The slideway 1231 is a circular hole, and its diameter matches the diameter of the engaging protrusion 121; the limiting channel 1233 is also a circular hole, and its diameter is smaller than the diameter of the engaging protrusion 121.

[0092] Specifically, the rotating body 123 includes a rotating upper cover 1234 and a rotating lower cover 1235 that is fitted and fixed with the rotating upper cover 1234; the rotating upper cover 1234 and the rotating lower cover 1235 have grooves 1236 on opposite sides; after the rotating upper cover 1234 and the rotating lower cover 1235 are fitted and fixed, the two grooves 1236 are combined to form the slideway 1231. The rotating upper cover 1234 and the rotating lower cover 1235 can be detachably connected and fixed by screws, which is convenient for the elastic reset member 122 and the engaging protrusion 121.

[0093] The projection of the fitting groove 112 on the vertical plane of the rotation axis is a major arc or semicircular shape. The major arc or semicircular fitting groove 122 is relatively smooth, which can facilitate the matching protrusion 1211 to slip off and separate when subjected to a large torque.

[0094] Specifically, the engaging groove 112 is a hemispherical groove, and the protrusion 1211 is a hemispherical body that matches the engaging groove 112. The assembly of the hemispherical groove and the hemispherical protrusion 1211 is relatively smooth, which facilitates pushing back the engaging protrusion 121 and compressing the elastic reset member 122 when the torque is large.

[0095] The rotating body 123 and the first rotating member 11 are both provided with openings 4 for the water supply pipe to pass through. Each opening 4 is arranged as an arc-shaped opening, and the axis of the opening 4 is coaxial with the rotation axis of the first rotating member. This is a design made for the electric kettle to facilitate the installation of the water supply pipe of the electric kettle.

[0096] Example 2

[0097] The driving mechanism 2 includes the over-torque protection transmission mechanism 1 of embodiment 1, and further includes a driving device 21 and a fixed support 22 .

[0098] The driving device 21 is connected to the first rotating member 11 and drives the first rotating member 11 to rotate; the driving device 21 may be a motor;

[0099] The fixing support 22 is used to fix the driving device 21 and has a cavity 221 for the first rotating member 11 and the second rotating member 12 to rotate.

[0100] The above-mentioned driving mechanism 2 adopts an over-torque protection transmission mechanism 1, which can prevent the driving device 21 connected to the input shaft from burning due to excessive torque.

[0101] Specifically, the fixed support 22 includes a fixed bracket 222 for fixing the driving device 21, a support upper cover 223 fixed to the fixed bracket 222, and a support lower cover 224 fixed to the support upper cover 223; the cavity 221 is formed between the support upper cover 223 and the support lower cover 224.

[0102] The support upper cover 223 and the support lower cover 224 are detachably connected and fixed via a buckle 225 , so as to facilitate the installation of the first rotating member 11 and the second rotating member 12 .

[0103] The support upper cover 223 and the support lower cover 224 are also correspondingly provided with openings 4 for the water supply pipe to pass through. Each opening 4 is arranged as an arc-shaped opening, and the axis of the opening 4 is coaxial with the rotation axis of the first rotating member. This is a design made for the electric kettle to facilitate the installation of the water supply pipe of the electric kettle.

[0104] Example 3

[0105] The electric kettle 3 includes the driving mechanism 2 of the second embodiment, and further includes: a kettle body 31, a sterilizing container 36, a heating base 32, a water adding arm 33, a water adding pipeline and a control main board.

[0106] Among them, the heating base 32 has a kettle body heating part for heating the kettle body 31 and a disinfection heating part for heating the disinfection container 36. It can be understood that both the kettle body heating part and the disinfection heating part are provided with electric heaters, or the electric heaters are located at the bottom of the kettle body 31 and the bottom of the disinfection container 36, and the kettle body heating part and the disinfection heating part are provided with corresponding power supply couplers.

[0107] The water adding rotating arm 33 includes a water adding column 331 arranged on the heating base 32 and a rotating arm 332 rotatably mounted on the upper end of the water adding column 331; the rotating arm 332 is a transmission member connected to the second rotating member 12; the fixed support 22 is fixed on the water adding column 331, and the rotation axis of the first rotating member 11 coincides with the rotation axis of the rotating arm 332, and the rotating body 123 is fixedly connected to the rotating arm 332.

[0108] The water supply pipe passes through the heating base 32 , the water supply column 331 , through each opening 4 and extends into the rotating arm 332 to form a water outlet at the end of the rotating arm 332 .

[0109] The control main board is electrically connected to the kettle body heating part, the driving device 21 and the water adding pipeline respectively, and is used to control the heating of the heating base 32, the rotation of the rotating arm 332 and the opening / closing of the valve of the water adding pipeline.

[0110] In the above-mentioned electric kettle 3, a driving mechanism 2 with an over-torque protection transmission mechanism is used to realize the rotation of the water-adding rotating arm 33, which can prevent the water-adding rotating arm 33 from hitting obstacles during rotation and causing the driving device 21 to burn out.

[0111] Specifically, the rotating body also has a plug-in portion 1237 for connecting with the rotating arm 332; the rotating arm 332 has a plug-in hole for the plug-in portion 1237 to be inserted and fixed; the fixed support 22 is provided with an avoidance groove 226 for the plug-in portion 1237 to pass through and rotate around the rotation axis of the rotating body, and the avoidance groove 226 is an arc groove corresponding to the rotation path of the plug-in portion 1237. Specifically, the plug-in component is a plug pin extending from the bottom of the rotating body, and the plug-in hole is a pin hole matching the plug pin. The connection between the rotating body and the rotating arm 332 is achieved by means of the plug-in portion 1237 and the plug-in hole.

[0112] The electric kettle 3 further comprises two position sensors and a trigger structure 35 .

[0113] Wherein, each of the in-place sensors is respectively fixed on the water adding column 331 corresponding to the position of the kettle body heating part and the disinfection heating part; each of the in-place sensors is electrically connected to the control mainboard;

[0114] The trigger structure 35 is arranged on the rotating arm 332 to trigger the in-place sensor; when the water inlet is located above the kettle body heating part, the trigger structure 35 triggers each in-place sensor. By providing the in-place sensor, the position where the rotating arm 332 stops adding water after rotating can be accurately controlled.

[0115] Specifically, the in-position sensor can be an infrared sensor having a transmitting end and a receiving end, which are arranged opposite to each other; a strip baffle extends from the rotating arm 332, and the trigger structure 35 is a hole on the baffle. The baffle is located between the transmitting end and the receiving end during rotation, blocking the light signal between the transmitting end and the receiving end. When the hole is rotated between the transmitting end and the receiving end, there is no obstruction between the transmitting end and the receiving end, thereby triggering the in-position information.

[0116] When in use, the two positions of the rotating arm 332 for adding water at the disinfection heating part and the kettle body heating part are working positions, and the position between the disinfection heating part and the kettle body heating part is the standby position. The angle between the two working positions and the rotation axis of the rotating arm 332 is 144°. After adding water, the valve is closed, and the control mainboard controls the driving device 21 to start rotating for a few seconds, so that the rotating arm 332 returns roughly to the standby position between the two working positions. Since water does not need to be added during standby, its position accuracy does not need to be considered, and it can be controlled only by its rotation time; while in the working position, the position accuracy needs to be controlled to prevent water injection deviation, so in-position sensors are set corresponding to the two working positions.

[0117] The other contents of the over-torque protection transmission mechanism, the driving mechanism and the electric kettle described in the present invention refer to the prior art and will not be described in detail here.

[0118] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Therefore, any modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An electric kettle, characterized in that: It includes a driving mechanism, a kettle body, a heating base, a water-adding rotating arm, a water-adding pipeline and a control mainboard; The driving mechanism comprises an over-torque protection transmission mechanism, a driving device and a fixed support; The over-torque protection transmission mechanism is used to connect the driving device and the driven member, and includes: A first rotating member, used to connect one of the driving device and the driven member, having a circular groove coaxial with the rotation axis of the first rotating member, the inner circumference of the circular groove of the first rotating member having a plurality of fitting grooves, and the fitting grooves are evenly arranged around the axis; The second rotating member is used to connect the other of the driving device and the driven member, including an engaging protrusion, an elastic reset member and a rotating body coaxial with the circular groove, the rotating body is received in the circular groove and rotates relatively with the first rotating member; the engaging protrusion has a protrusion matching the engaging groove; the rotating body is provided with a slideway for the engaging protrusion to slide; the elastic reset member is located in the slideway and pushes the engaging protrusion out so that the protrusion is embedded in the engaging groove; after the protrusion is embedded in the engaging groove, when the torque between the first rotating member and the second rotating member is greater than the engaging force between the protrusion and the engaging groove, the engaging protrusion compresses the elastic reset member so that the protrusion is disengaged from the engaging groove; The driving device is connected to the first rotating member and drives the first rotating member to rotate, or is connected to the rotating body and drives the rotating body to rotate; The fixed support is used to fix the driving device and has a cavity for the first rotating member and the second rotating member to rotate; The heating base has a kettle body heating portion for heating the kettle body; The water-adding rotating arm comprises a water-adding column arranged on the heating base and a rotating arm rotatably mounted on the upper end of the water-adding column; the fixed support is fixed on the water-adding column, and the rotation axis of the first rotating member coincides with the rotation axis of the rotating arm; one of the rotating body and the first rotating member that is not connected to the driving device is fixedly connected to the rotating arm; The water supply pipeline extends from the heating base through the water supply column to the inside of the rotating arm and forms a water outlet at the end of the rotating arm; The control mainboard is electrically connected to the kettle body heating part, the driving device, and the water supply pipeline respectively; A limiting convex portion is provided at the exit of the slideway, and the limiting convex portion forms a limiting channel through which only the convex portion can extend; The projection of the engaging groove on the vertical plane of the rotation axis is an arc or a semicircle.

2. The electric kettle according to claim 1, characterized in that: The rotating body comprises a rotating upper cover and a rotating lower cover which is fitted and fixed with the rotating upper cover; the opposite sides of the rotating upper cover and the rotating lower cover are both provided with slots; after the rotating upper cover and the rotating lower cover are fitted and fixed, the two slots are combined to form the slideway.

3. The electric kettle according to claim 1, characterized in that: The embedding groove is a hemispherical groove; the protrusion is a hemispherical body matched with the embedding groove.

4. The electric kettle according to claim 1, characterized in that: The rotating body and the first rotating member are both provided with openings for the water supply pipeline to pass through.

5. The electric kettle according to claim 4, characterized in that: The fixed support comprises a fixed bracket for fixing the driving device, a support upper cover fixed to the fixed bracket, and a support lower cover matched with the support upper cover and fixed; The cavity is formed between the support upper cover and the support lower cover.

6. The electric kettle according to claim 4, characterized in that: The support upper cover and the support lower cover are connected and fixed by means of a snap-fit ​​detachable connection.

7. The electric kettle according to claim 1, characterized in that: The rotating body or the first rotating member has a plug-in portion connected to the rotating arm; the rotating arm has a plug-in hole for the plug-in portion to be inserted and fixed; the fixed support is provided with an avoidance groove for the plug-in portion to pass through and rotate around the rotation axis of the rotating body.

8. The electric kettle according to claim 1, characterized in that: Also includes: A position sensor is provided, wherein the position of the position sensor corresponding to the position of the kettle body heating part is fixed on the water adding column; the position sensor is electrically connected to the control main board; A trigger structure is arranged on the rotating arm and is used to trigger the in-place sensor; when the water outlet is located above the heating part of the kettle body, the trigger structure triggers the in-place sensor.

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