Home appliance cover turning gear box capable of preventing teeth from being broken

Abstract

The utility model belongs to the technical field of household appliance accessories, and particularly relates to a household appliance cover turning gear box capable of preventing teeth from being broken, which comprises an outer shell, a motor, a multi-stage planetary reduction gear set, an output shaft and an angle sensor, the multi-stage planetary reduction gear set is composed of a first-stage planetary gear set, a second-stage planetary gear set and a third-stage planetary gear set. An output gear of the motor is connected with a planetary gear of the first-stage planetary gear set. And the third-stage planetary gear carrier is connected and fixed with the output shaft through hot melting, and a gear is arranged in the circumferential direction of the third-stage planetary gear carrier and is meshed with a transmission gear of the angle sensor. The multi-stage planetary gear set is adopted, the structure is compact, operation is stable, the size is small, assembling and using are easy, the problem that the driving device is damaged or the motor is burnt down due to the over-rotation condition of the motor is effectively solved, the maintenance cost is reduced, the service life of the driving device is prolonged, and the problem of automatic cover turning of the intelligent home is solved. And the smart home practical experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of home appliance accessories, in particular to a home appliance cover ratchet wheel box of preventing tooth breakage. BACKGROUND

[0002] In smart home devices, the flip cover function is an important component. Especially for devices such as smart toilets and smart trash cans, the automation and intelligence level of the flip cover function directly affect the user's experience and the overall performance of the device.

[0003] In order to meet the automation and intelligence needs of smart home devices for flip cover function, electric drive technology is applied to the design of flip cover gear box. Through the coordinated work of motor, gear transmission mechanism and other components, the electric drive technology realizes the automatic opening and closing of the flip cover. This technology not only improves the convenience of the device, but also reduces the hygiene problems caused by manual operation.

[0004] The electric drive flip cover gear box for smart home on the market has the disadvantages of low service life (easy tooth breakage), high noise, etc. The motor overruns, causing damage to the drive device or overheating of the motor, which seriously affects the performance of the application product and the user experience. Therefore, a home appliance cover ratchet wheel box that prevents tooth breakage is needed. SUMMARY

[0005] The purpose of this section is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0007] A home appliance cover ratchet wheel box that prevents tooth breakage, comprising an outer shell, a motor, a multi-stage planetary reduction gear set, an output shaft and an angle sensor;

[0008] The multi-stage planetary reduction gear set is composed of a one-stage planetary gear set, a two-stage planetary gear set and a three-stage planetary gear set, wherein the output gear of the motor is connected with the planetary gear of the one-stage planetary gear set; the three-stage planetary gear frame is fixed with the output shaft through hot melting connection, and the circumferential direction of the three-stage planetary gear frame is provided with a gear, which is engaged with the transmission gear of the angle sensor;

[0009] The inner cavity structure matched with the motor, the multi-stage planetary gear set, the output shaft and the angle sensor is designed in the outer shell;

[0010] The clutch device is mainly composed of a sun disc, a cylindrical gear on the sun disc is engaged with the planetary gear of the second planetary gear set, and the sun disc is provided with regularly distributed convex edges in the circumferential direction;

[0011] The first planetary gear set comprises a first planetary carrier, the first planetary carrier is provided with a pawl mechanism with elastic arms nested with the sun disc, and the outer side of the first planetary carrier is provided with an arc-shaped groove of an overload avoiding space;

[0012] Under the action of the elastic arms, the pawl can be engaged with the convex edges on the sun disc, when the first planetary gear set rotates, the convex edges on the sun disc and the pawl of the first planetary carrier are engaged with each other, so as to drive the rotation of the second planetary gear set; when the first planetary gear set rotates and the second planetary gear set is relatively static, the convex edges and the pawl are slippage.

[0013] As a preferred scheme of the household appliance cover ratchet wheel box of the utility model, the number of the pawls of the first planetary carrier is four.

[0014] As a preferred scheme of the household appliance cover ratchet wheel box of the utility model, a plurality of ventilation holes for heat exchange between the motor and the outside and wire outlet holes for wire arrangement are sequentially arranged on the outer shell.

[0015] As a preferred scheme of the household appliance cover ratchet wheel box of the utility model, a limiting stop column is arranged on the third planetary gear carrier and is located on the same side of the output shaft, and a limiting groove is arranged on the inner side of the output shaft positioning seat in the outer shell and is in sliding cooperation with the limiting stop column.

[0016] As a preferred scheme of the household appliance cover ratchet wheel box of the utility model, the outer shell comprises a motor shell, a motor flange, a planetary gear set shell and an output shaft positioning seat, the motor is fixed between the motor shell and the motor flange, one end of the motor flange is fixedly connected to the motor end through bolts, and the other end is fixed to one end of the planetary gear set shell, and the other end of the planetary gear set shell is fixedly connected to the output shaft positioning seat.

[0017] As a preferred scheme of the household appliance cover ratchet wheel box of the utility model, the output gear of the motor is engaged with the planetary gear of the first planetary gear set through the motor flange, a first gasket with a positioning function is arranged between the motor flange and the planetary gear of the first planetary gear set, and an inner gear ring is arranged in the planetary gear set shell and is engaged with the planetary gears of the first, second and third planetary gear sets, respectively.

[0018] The second gasket is arranged between the primary planetary carrier and the planetary gears of the secondary planetary gear set, and an angle sensor is fixedly installed between the planetary gear set housing and the output shaft locating seat.

[0019] Compared with the prior art, the utility model discloses the following beneficial effects: adopt multistage planetary gear set, compact structure, stable operation, small, easy to assemble and use, effectively prevent the problem of drive device damage or motor burnout caused by motor overrunning, reduce the maintenance cost, improve the service life of drive device, reduce the problem of automatic cover of intelligent home, improve the practical experience of intelligent home. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the utility model will be described in detail below with the drawings and detailed implementation, obviously, the drawings in the following description are only some implementation of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor, wherein:

[0021] Figure 1 It is the explosion structure schematic diagram of the utility model;

[0022] Figure 2 It is Figure 1 The structure schematic diagram after assembly;

[0023] Figure 3 It is the assembly structure schematic diagram of the tertiary planetary gear carrier and the output shaft of the utility model;

[0024] Figure 4 It is the installation schematic diagram of the primary planetary carrier, sun gear disc and second gasket of the utility model;

[0025] Figure 5 It is the primary planetary carrier structure schematic diagram of the utility model.

[0026] In the drawing: 1, motor shell;2, motor;3, motor flange;4, first gasket;5, primary planetary gear set;501, primary planetary carrier;502, pawl;503, gasket groove;504, arc groove;505, elastic arm;6, sun gear disc;601, cylindrical gear;602, convex rib;7, second gasket;8, secondary planetary gear set;9, planetary gear set housing;10, tertiary planetary gear set;1001, tertiary planetary gear carrier;1002, limiting stop column;1003, output shaft;11, angle sensor;12, output shaft locating seat;1201, limiting recess. DETAILED DESCRIPTION

[0027] In order to make the above objects, features and advantages of the present application more obvious, specific embodiments of the present application will be described in detail below with reference to the drawings.

[0028] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific details set forth herein without departing from the scope of the present application, and it is understood that the present application is not limited in this respect. Accordingly, the present application is not limited to the specific embodiments described below, but only by the claims.

[0029] Secondly, the present application is described in detail in combination with the schematic diagram, and in the detailed description of the embodiments of the present application, for the convenience of description, the sectional view showing the structure of the device is partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0030] In order to make the objects, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0031] Please refer to Figures 1-5 , which is a structural schematic diagram of an anti-tooth-breaking household appliance cover racking gear box embodiment of the present application, please refer to Figures 1-5 , for a detailed introduction of an anti-tooth-breaking household appliance cover racking gear box.

[0032] Please refer to Figures 1-4The application discloses a tooth-breaking-preventing household appliance cover ratchet gear box, which comprises an outer shell, a motor 2, a multi-stage planetary gear set, an output shaft 1003 and an angle sensor 11, wherein the outer shell is composed of a motor shell 1, a motor flange 3, a planetary gear set outer shell 9 and an output shaft positioning seat 12; during assembly, the motor is installed between the motor shell and the motor flange, one end of the motor flange is fixed to the motor end through bolts, and the other end is connected to the planetary gear set outer shell; the fixing mode between the above-mentioned shell parts can adopt glue or laser welding; the multi-stage planetary gear set comprises a first-stage planetary gear set 5, a second-stage planetary gear set 8 and a third-stage planetary gear set 10; the output gear of the motor is engaged with the planetary gear of the first-stage planetary gear set through the motor flange, and a first gasket 4 with a positioning function is arranged between the motor flange and the planetary gear of the first-stage planetary gear set; a clutch device is arranged between the first-stage planetary gear set and the second-stage planetary gear set; the main body of the clutch device is a sun wheel disc 6, the sun wheel disc is provided with a cylindrical gear 601 engaged with the planetary gear of the second-stage planetary gear set, and a plurality of convex ribs 602 are uniformly distributed in the circumferential direction of the sun wheel disc; a first-stage planet carrier 501 is provided with a pawl 502 nested with the sun wheel disc, the pawl has a resilient arm 505, and an arc-shaped groove 504 for overload avoidance is arranged on the outer side surface; under the action of the resilient arm, the pawl is closely engaged with the convex rib of the sun wheel disc; when the first-stage planetary gear set rotates, the convex rib of the sun wheel disc is engaged with the pawl of the first-stage planet carrier, thereby driving the second-stage planetary gear set to rotate; when the first-stage planetary gear set rotates and the second-stage planetary gear set remains stationary, the convex rib and the pawl will slide, thereby forming a slipping phenomenon; the design effectively solves the tooth-breaking problem of the cover ratchet gear box and realizes overload protection of the system.

[0033] The second gasket 7 is arranged between the primary planetary gear carrier 501 and the planetary gears of the secondary planetary gear set 8, and is positioned in the gasket groove 503 of the end face of the primary planetary gear carrier; the end face of the planetary gear carrier of the secondary planetary gear set is connected to the planetary gears of the tertiary planetary gear set 10 through a cylindrical gear transmission, the tertiary planetary gear carrier 1001 is fixedly connected to the output shaft 1003 after being heated and fused, and the tertiary planetary gear carrier is provided with a gear in the circumferential direction and is engaged with the transmission gear of the angle sensor 11, the angle sensor is fixed in the cavity between the planetary gear set housing 9 and the output shaft positioning seat 12, the rotation direction of the output shaft is limited through the positioning action of the output shaft positioning seat, and the tertiary planetary gear carrier is limited in the cavity of the output shaft positioning seat; the tertiary planetary gear carrier is provided with a limiting stop column 1002 located on the same side as the output shaft, and the inner side of the output shaft positioning seat is provided with a limiting groove 1201 which is in sliding cooperation with the limiting stop column and limits the swinging angle of the output shaft; through the combination of the limiting structure and the angle sensor, the limited rotation of the output shaft is realized, so that the opening or closing state of the passive actuator is accurately positioned; the inner ring gear is arranged in the circumferential direction in the planetary gear set housing and is engaged with the planetary gears of the primary planetary gear set, the secondary planetary gear set and the tertiary planetary gear set respectively, so as to realize the speed reduction of the multi-stage gear set.

[0034] Please refer again to Figure 5 The number of the pawls 502 of the primary planetary gear carrier 501 is 4, the pawl elastic arms 505 of the primary planetary gear carrier are in the shape of a circular arc, and the outer side is provided with an arc-shaped groove 504 which is an overload avoiding space, so as to meet the space requirement of overload stress;

[0035] The motor housing 1 is provided with a ventilation opening for heat exchange with the outside and a wire outlet hole for wire arrangement;

[0036] The planetary gears of the primary planetary gear set 5, the cylindrical gears of the sun gear disc 6 and the planetary gears of the secondary planetary gear set 8 are all helical gears, which have high transmission efficiency and are easier to run in, so as to improve the service life of the gear box and be suitable for high-speed motion;

[0037] In the normal working state, the convex ribs 602 of the sun gear disc 6 are closely engaged with the pawls 502 of the primary planetary gear carrier 501 and transmit power, so that the motor 2 drives the multi-stage planetary gear set and the output shaft 1003 to rotate; when the output shaft is rotated to the position, if the motor is over-rotated or the transmission stress exceeds the normal range, that is, the overload phenomenon occurs, at this time, the convex ribs of the sun gear disc slide with the pawls of the primary planetary gear carrier, so as to effectively solve the problem of broken teeth of the flip cover gear box, protect the driving device, prevent the motor from burning out, and realize the overload protection of the system;

[0038] The convex rib 602 of the sun gear disc 6 and the pawl 502 mechanism of the primary planetary carrier 501, when in a normal working state, the meshing force between the sun gear disc and the primary planetary carrier provides transmission power, thereby driving the multi-stage planetary gear set and the output shaft 1003 to rotate by the motor 2; when the output shaft rotates to a position, if the motor overruns or the transmission force exceeds the set normal range, that is, an overload phenomenon occurs, then through the mutual slipping of the convex rib of the sun gear disc and the pawl mechanism of the primary planetary carrier, the problem of broken teeth of the flip cover gear box is effectively solved, the driving device is protected, and the motor is prevented from being damaged due to overheating, thereby realizing overload protection of the system.

[0039] Although the present application has been described with reference to the embodiments above, various improvements can be made and equivalent components can be substituted without departing from the scope of the present application. In particular, each feature disclosed in the embodiments of the present application can be combined with any other feature disclosed in the embodiments of the present application, as long as there is no structural conflict. The combinations of these features are not exhaustively described in the present specification, which is merely for the purpose of omitting the length and saving resources. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A ratchet tooth preventing home appliance cover ratchet wheel case, characterized in that, The outer shell, motor (2), multi-stage planetary gear set, output shaft (1003) and angle sensor (11); The multi-stage planetary gear set is composed of a first-stage planetary gear set (5), a second-stage planetary gear set (8) and a third-stage planetary gear set (10), wherein the output gear of the motor (2) is connected with the planetary gear of the first-stage planetary gear set (5); the third-stage planetary gear carrier (1001) is fixed with the output shaft (1003) through hot melting connection, and the circumferential direction of the third-stage planetary gear carrier (1001) is provided with gears and is engaged with the transmission gear of the angle sensor (11); The inner cavity structure matched with the motor (2), multi-stage planetary gear set, output shaft (1003) and angle sensor (11) is designed in the outer shell; The first-stage planetary gear set (5) and the second-stage planetary gear set (8) are provided with a clutch device, the main body of the clutch device is a sun disc (6), the sun disc (6) is provided with a cylindrical gear (601) engaged with the planetary gear of the second-stage planetary gear set (8), and the circumferential direction of the sun disc (6) is provided with regularly distributed convex edges (602); The first-stage planetary gear set (5) comprises a first-stage planetary carrier (501), the first-stage planetary carrier (501) is provided with a pawl (502) mechanism with elastic arms (505) nested with the sun disc (6), and the outer side of the first-stage planetary carrier (501) is provided with an arc-shaped groove (504) with an overload avoiding space; Under the action of the elastic arms (505), the pawl (502) can be engaged with the convex edges (602) on the sun disc (6), when the first-stage planetary gear set (5) rotates, the convex edges (602) on the sun disc (6) are engaged with the pawl (502) of the first-stage planetary carrier (501), and the rotation of the second-stage planetary gear set (8) is driven; when the first-stage planetary gear set (5) rotates and the second-stage planetary gear set (8) is relatively static, the convex edges (602) and the pawl (502) are engaged.

2. A tooth breakage preventing lid flip gear box of an electric home appliance according to claim 1, wherein: The number of the pawls (502) of the first-stage planetary carrier (501) is four.

3. A tooth breakage preventing cover flip gear box of an electric home appliance according to claim 1, wherein: A plurality of ventilation holes for heat exchange between the motor (2) and the outside and wire outlet holes for wire arrangement are sequentially formed in the outer shell.

4. The tooth breakage preventing cover flip gear box of the home appliance according to claim 1, wherein: The third-stage planetary gear carrier (1001) is provided with a limiting stop column (1002) on the same side of the output shaft (1003), and the inner side of the output shaft positioning seat (12) in the outer shell is provided with a limiting groove (1201) in sliding cooperation with the limiting stop column (1002).

5. A tooth breakage preventing lid flip gear box of an electric home appliance according to claim 4, wherein: The outer shell comprises a motor shell (1), a motor flange (3), a planetary gear set outer shell (9) and an output shaft positioning seat (12), the motor (2) is fixed between the motor shell (1) and the motor flange (3), one end of the motor flange (3) is fixedly connected to the motor (2) through bolts, the other end is fixed to one end of the planetary gear set outer shell (9), and the other end of the planetary gear set outer shell (9) is fixedly connected with the output shaft positioning seat (12).

6. A tooth breakage preventing lid flip gear box of an electric home appliance according to claim 5, wherein: The output gear of the motor (2) is engaged with the planetary gears of the first planetary gear set (5) through the motor flange (3), and a first gasket (4) with positioning function is arranged between the motor flange (3) and the planetary gears of the first planetary gear set (5), and the planetary gear set housing (9) is internally provided with an inner ring gear corresponding to the planetary gears of the first, second and third planetary gear sets (10) respectively; A second gasket (7) is arranged between the first carrier (501) and the planetary gears of the second planetary gear set (8), and an angle sensor (11) is fixedly installed between the planetary gear set housing (9) and the output shaft positioning seat (12).

Images