Low-noise cover body electric gearbox

Abstract

The utility model discloses a low noise cover body electric gear box, including: shell, motor body, multistage planetary gear set, output shaft body, angle sensor, the shell is composed of motor casing, motor flange, planetary gear set shell and output shaft locating seat, motor body is installed between motor casing and motor flange, and the output shaft locating seat is installed in planetary gear set shell. One end of the motor flange is fixed to the motor end through a bolt. According to the convex edges of the sun wheel disc and the pawl mechanism of the first-stage planet carrier, in the normal working state, meshing force between the sun wheel disc and the first-stage planet carrier provides transmission force, and therefore the motor body drives the multi-stage planet gear set and the output shaft body to rotate; after the output shaft body rotates in place, if the motor body rotates excessively or the transmission stress exceeds a set normal range, namely, an overload phenomenon occurs, the problem of tooth breakage of the flip gear box is effectively solved through mutual slipping of the ribs of the sun wheel disc and the pawl mechanism of the first-stage planet carrier.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear box technical field more specifically is a low noise's cover body electric gear box. BACKGROUND

[0002] With the continuous progress of technologies such as the Internet of Things and artificial intelligence, the smart home market is rapidly developing. Smart home products greatly improve people's living experience and quality of life through intelligent control, automated operation, and other methods. Smart toilets and other smart home devices, as representatives, are gradually entering millions of households. In smart home devices, the flip cover function is an important component. In particular for devices such as smart toilets and smart trash cans, the automation and intelligence of the flip cover function directly affect the user's experience and the overall performance of the device.

[0003] The electrically driven flip cover gear box for smart home currently on the market has the disadvantages of low service life and high noise. In the case of motor overrunning, the driving device is damaged or the motor overheats, which seriously affects the performance of the application product and the user experience. Therefore, a new technical solution is needed to solve this problem. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a low noise's cover body electric gear box to solve the problems in the above background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: A low noise cover electric gear box, include: shell, motor body, multistage planetary gear set, output shaft body, angle sensor, the shell is by motor shell, motor flange, planetary gear set shell and output shaft positioning seat composition, the motor body is installed between motor shell and motor flange, one end of motor flange is fixed to motor end through bolt and is connected to planetary gear set shell in the other end, the planetary gear set includes primary planetary gear set, secondary planetary gear set and tertiary planetary gear set, the output gear of motor body is engaged with the planetary gear of primary planetary gear set through motor flange back, be equipped with clutching device between primary planetary gear set and secondary planetary gear set, the main part of clutching device is sun gear disc, be equipped with the cylindrical gear of engaging with the planetary gear of secondary planetary gear set on sun gear disc, the circumferential direction of sun gear disc evenly has a plurality of convex edges, the inside of primary planetary carrier is provided with the pawl of embedding cooperation with sun gear disc in primary planetary gear set, the convex edge of pawl and sun gear disc is engaged with each other, the inside of primary planetary carrier is provided with gasket groove, the planetary carrier end surface of secondary planetary gear set is connected through cylindrical gear transmission tertiary planetary gear set planetary gear, the tertiary planetary gear set includes tertiary planetary gear carrier, the side of tertiary planetary gear carrier is provided with output shaft body and the outside of output shaft body is provided with output shaft positioning seat, the lower part of planetary carrier of tertiary planetary gear set is provided with angle sensor, the circumferential direction of tertiary planetary gear carrier is provided with gear and is engaged with angle sensor transmission gear, the angle sensor is fixed in the chamber between planetary gear set shell and output shaft positioning seat, the limiting stop post of being located with output shaft body is provided with in tertiary planetary gear carrier, the inside of output shaft positioning seat is provided with limiting recess groove and is formed with limiting stop post sliding fit and restricts the swing angle of output shaft body.

[0006] As a preferred embodiment of the utility model, the fixing mode between the shell parts adopts laser welding.

[0007] As a preferred embodiment of the utility model, the first gasket is arranged between the motor flange and the planetary gear of the primary planetary gear set.

[0008] As a preferred embodiment of the utility model, the pawl has an elastic arm, the elastic arm is provided with a rectangular groove on the outer side, the number of the pawls of the primary planetary carrier is four, and the elastic arm of the pawl of the primary planetary carrier is in the shape of a circular arc.

[0009] As a preferred embodiment of the utility model, the second gasket is arranged between the primary planetary carrier and the planetary gear of the secondary planetary gear set, and the second gasket is positioned in the gasket groove of the end face of the primary planetary carrier.

[0010] As an optimal implementation form of the utility model, the motor shell is provided with a ventilation opening for heat exchange with the outside and a wire outlet hole for wire outlet.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The convex rib of the sun wheel disc and the pawl mechanism of the primary planet carrier provide transmission force between the sun wheel disc and the primary planet carrier in the normal working state, thereby driving the rotation of the multi-stage planetary gear set and the output shaft body by the motor body; when the output shaft body is rotated to the position, if the motor body is over-rotated or the transmission stress exceeds the set normal range, that is, the overload phenomenon occurs, the mutual slipping of the convex rib of the sun wheel disc and the pawl mechanism of the primary planet carrier effectively solves the problem of broken teeth of the flip gear box, protects the driving device and prevents the motor body from being damaged due to overheating, thereby realizing the overload protection of the system. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the utility model;

[0014] Figure 2 It is an explosion structure schematic view of the utility model;

[0015] Figure 3 It is a primary planet carrier structure schematic view of the utility model;

[0016] Figure 4 It is a primary planet carrier, sun wheel disc and second gasket installation schematic view of the utility model;

[0017] Figure 5 It is a three-stage planet gear carrier and output shaft assembly structure schematic view of the utility model.

[0018] In the drawing: 1, motor shell; 2, motor; 3, motor flange; 4, first gasket; 5, primary planetary gear set; 6, primary planet carrier; 7, pawl; 8, gasket groove; 9, rectangular groove; 10, elastic arm; 11, sun wheel disc; 12, cylindrical gear; 13, convex rib; 14, second gasket; 15, secondary planetary gear set; 16, planetary gear set shell; 17, three-stage planetary gear set; 18, three-stage planet gear carrier; 19, limit stop column; 20, output shaft; 21, angle sensor; 22, output shaft positioning seat; 23, limit recess. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0020] Please refer to Figures 1-5 The present application provides a technical solution: a low-noise cover electric gear box.

[0021] In view of the above description, the intelligent household electric drive flip gear box on the market has the problems of low service life, high noise, motor overrunning, damage to the driving device or overheating of the motor, and serious influence on the performance of the application product and user experience.

[0022] The solution is as follows: a low-noise cover electric gear box, comprising: an outer shell, a motor body 2, a multi-stage planetary gear set, an output shaft body 20, an angle sensor 21, the outer shell is composed of a motor shell 1, a motor flange 3, a planetary gear set shell 16 and an output shaft positioning seat 22, the motor body 2 is installed between the motor shell 1 and the motor flange 3, one end of the motor flange 3 is fixed to the motor end by bolts and the other end is connected to the planetary gear set shell 16, the planetary gear set comprises a first-stage planetary gear set 5, a second-stage planetary gear set 15 and a third-stage planetary gear set 17, the output gear of the motor body 2 is engaged with the planetary gear of the first-stage planetary gear set 5 through the motor flange 3, a clutch device is arranged between the first-stage planetary gear set 5 and the second-stage planetary gear set 15, the main body of the clutch device is a sun gear disc 11, a cylindrical gear 12 engaged with the planetary gear of the second-stage planetary gear set 15 is arranged on the sun gear disc 11, a plurality of convex ribs 13 are uniformly distributed in the circumferential direction of the sun gear disc 11, the first-stage planetary gear set 5 comprises a first-stage planetary carrier 6, and a pawl 7 engaged with the sun gear disc 11 is arranged in the inner part of the first-stage planetary carrier 6, the pawl 7 is engaged with the convex rib 13 of the sun gear disc 11, a gasket groove 8 is arranged in the inner part of the first-stage planetary carrier 6, the planetary carrier end face of the second-stage planetary gear set 15 is connected to the planetary gear of the third-stage planetary gear set 17 through a cylindrical gear transmission, the third-stage planetary gear set 17 comprises a third-stage planetary gear carrier 18, the output shaft body 20 is arranged on the side face of the third-stage planetary gear carrier 18, and the outer part of the output shaft body 20 is provided with an output shaft positioning seat 22, an angle sensor 21 is arranged at the lower part of the planetary carrier of the third-stage planetary gear set 17, a gear is arranged in the circumferential direction of the third-stage planetary gear carrier 18 and engaged with the transmission gear of the angle sensor 21, the angle sensor 21 is fixed in the cavity between the planetary gear set shell 16 and the output shaft positioning seat 22, the third-stage planetary gear carrier 18 is provided with a limiting stop column 19 located on the same side as the output shaft body 20, and the inner side face of the output shaft positioning seat 22 is provided with a limiting groove 23 which is in sliding fit with the limiting stop column 19 and limits the swing angle of the output shaft body 20.

[0023] Further improved, as shown in Figure 2 The fixing mode between the shell parts adopts laser welding, which can enhance the structural strength and sealing performance of the gear box and prevent noise and performance decline caused by looseness or gap.

[0024] Further improved, as shown in Figure 2 The first gasket 4 is arranged between the motor flange 3 and the planetary gear of the first-stage planetary gear set 5, which can reduce the friction and wear between the motor flange 3 and the first-stage planetary gear set 5, improve the transmission efficiency and service life, and reduce noise.

[0025] Further improved, asFigure 3 As shown: the pawl 7 has a elastic arm 10 and the elastic arm 10 is provided with a rectangular slot 9 on the outside, the number of the pawl 7 of the primary planetary carrier 6 is four, the elastic arm 10 of the pawl 7 of the primary planetary carrier 6 is in a circular arc shape, the design of the elastic arm 10 and the rectangular slot 9 makes the pawl 7 more flexible to adapt to the convex rib 13 of the sun gear disc 11 when under stress, reduces impact and wear, and at the same time the circular arc design of the four pawls 7 makes the engagement more uniform and stable, improves the transmission efficiency and overload protection capacity.

[0026] Further improved, as shown in Figure 2 As shown: the primary planetary carrier 6 and the planetary gears of the secondary planetary gear set 15 are provided with a second gasket 14 and the second gasket 14 is positioned in the gasket slot 8 of the end surface of the primary planetary carrier 6, the second gasket 14 further reduces the friction and wear between the primary planetary carrier 6 and the secondary planetary gear set 15, improves the transmission efficiency and service life, and at the same time the design of the gasket slot 8 makes the gasket positioning more stable and reliable.

[0027] Further improved, as shown in Figure 5 As shown: the third planetary gear carrier 18 is provided with a limiting stop column 19 located on the same side as the output shaft body 20, and the inner side of the output shaft positioning seat 22 is provided with a limiting recess 23 which forms a sliding fit with the limiting stop column 19 and limits the swing rotation angle of the output shaft body 20, the design of the limiting stop column 19 and the limiting recess 23 realizes the precise limiting of the output shaft body 20, prevents its excessive swing or rotation, improves the stability and precision of the transmission, and at the same time reduces the noise and wear caused by swing.

[0028] Further improved, as shown in Figure 2 As shown: the motor shell 1 is provided with a ventilation opening for heat exchange with the outside and a wire outlet hole for wire arrangement, the design of the ventilation opening helps to dissipate the heat generated by the motor during operation in time, prevents the motor from overheating and being damaged, and prolongs the service life; the wire outlet hole facilitates the arrangement and connection of the wires, improves the neatness and safety of the whole machine.

[0029] Working principle: the utility model discloses a first planetary gear set 5 rotates, through the convex edge 13 of sun wheel disc 11, with the pawl 7 of first planetary carrier 6 is engaged, and then drives second planetary gear set 15 to rotate.When the first planetary gear set 5 rotates and the second planetary gear set 15 keeps still, the convex edge 13 between the pawl 7 will slide, and the skidding phenomenon is formed.This design effectively solves the broken tooth problem of the flip gear box, and realizes the overload protection of the system, the third planetary gear carrier 18 is provided with the limiting stop post 19 located on the same side with the output shaft body 20, and the inner side surface of the output shaft positioning seat 22 is provided with the limiting groove 23 that forms the sliding fit with the limiting stop post 19 and limits the swing rotation angle of the output shaft body 20.Combining the limiting structure with the angle sensor 21, the limiting rotation of the output shaft body 20 is realized, so that the opening or closing state of the passive actuating mechanism is accurately positioned.The circumferential direction in the above-mentioned planetary gear set shell 16 is provided with the inner gear ring engaged with the respective planetary gears of the first planetary gear set 5, the second planetary gear set 15 and the third planetary gear set 17 respectively, to realize the speed reduction of the multi-stage gear set.

[0030] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and it is obvious for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.

[0031] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to indicate the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change.

[0032] Finally, it should be pointed out that: the above-mentioned only for the preferred embodiments of the present application, and does not limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A low noise, covered electric gear box, characterized in that: It includes: The outer shell, motor body (2), multi-stage planetary gear set, output shaft body (20), angle sensor (21), the outer shell is composed of motor shell (1), motor flange (3), planetary gear set shell (16) and output shaft positioning seat (22), the motor body (2) is installed between motor shell (1) and motor flange (3), one end of the motor flange (3) is fixed to the motor end through bolt and the other end is connected to the planetary gear set shell (16), the planetary gear set includes primary planetary gear set (5), secondary planetary gear set (15) and tertiary planetary gear set (17), the output gear of the motor body (2) is engaged with the planetary gear of the primary planetary gear set (5) through the motor flange (3), the primary planetary gear set (5) and the secondary planetary gear set (15) are provided with a clutch device, the main body of the clutch device is a sun gear disc (11), the sun gear disc (11) is provided with a cylindrical gear (12) engaged with the planetary gear of the secondary planetary gear set (15), a plurality of convex edges (13) are uniformly distributed in the circumferential direction of the sun gear disc (11), the primary planetary gear set (5) includes a primary planet carrier (6) and the primary planet carrier (6) is provided with a pawl (7) nested with the sun gear disc (11), the pawl (7) is engaged with the convex edge (13) of the sun gear disc (11), the primary planet carrier (6) is provided with a gasket groove (8), the planet carrier end face of the secondary planetary gear set (15) is connected to the planetary gear of the tertiary planetary gear set (17) through cylindrical gear transmission, the tertiary planetary gear set (17) includes a tertiary planet carrier (18), the output shaft body (20) is arranged on the side of the tertiary planet carrier (18) and the output shaft body (20) is provided with an output shaft positioning seat (22), the angle sensor (21) is arranged at the lower part of the planet carrier of the tertiary planetary gear set (17), the tertiary planet carrier (18) is provided with a gear in the circumferential direction and is engaged with the transmission gear of the angle sensor (21), the angle sensor (21) is fixed in the cavity between the planetary gear set shell (16) and the output shaft positioning seat (22), the tertiary planet carrier (18) is provided with a limiting stop column (19) located on the same side of the output shaft body (20), and the inner side of the output shaft positioning seat (22) is provided with a limiting groove (23) which is in sliding fit with the limiting stop column (19) and limits the swing angle of the output shaft body (20).

2. A low noise, covered electric gear box according to claim 1, characterized in that: The fixing mode between the outer shell parts adopts laser welding.

3. A low noise, covered electric gear box as claimed in claim 1, wherein: The motor flange (3) and the planetary gear of the primary planetary gear set (5) are provided with a first gasket (4).

4. A low noise, covered electric gear box as claimed in claim 1, wherein: The pawl (7) has a resilient arm (10) and the resilient arm (10) is provided with a rectangular groove (9) on the outer side, the number of pawls (7) of the primary planet carrier (6) is four, and the resilient arm (10) of the pawl (7) of the primary planet carrier (6) is in circular arc shape.

5. A low noise, covered electric gear box as claimed in claim 1, wherein: The first planetary carrier (6) is provided with a second gasket (14) between the planetary gears of the second planetary gear set (15), and the second gasket (14) is positioned in the gasket groove (8) of the end face of the first planetary carrier (6).

6. A low noise, covered electric gear box as claimed in claim 1, wherein: The motor shell (1) is provided with a ventilation opening for heat exchange with the outside and a wire outlet hole for wire arrangement.

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