Motor driver applied to automobile seat folding

Abstract

The utility model discloses a motor driver applied to automobile seat folding, which comprises a driving motor, a reduction gearbox assembly and a power output shaft, the reduction gearbox assembly comprises a reduction gearbox body, and a planetary reduction mechanism is embedded in a box body accommodating cavity of the reduction gearbox body; the planetary reducing mechanism comprises an inner gear ring and a first planet carrier, and the first planet carrier is provided with a first planet wheel meshed with the inner gear ring; a driving worm gear and a first sun gear are further embedded in the containing cavity of the box body, a motor output shaft of the driving motor is provided with a driving worm meshed with the driving worm gear, and the first sun gear is meshed with the first planet gears; the power output shaft is provided with a second planet carrier, the second planet carrier and the power output shaft are of an integrated structure, and the second planet carrier is provided with a second planet wheel meshed with the inner gear ring; and a second sun gear arranged on the first planet carrier is meshed with each second planet wheel. By means of the structural design, the novel speed reducer has the advantages of being novel in structural design, large in output torque and high in applicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor driver technical field especially relates to a kind of motor driver applied to automobile seat folding. BACKGROUND

[0002] For seven-seat SUV models or MPV cars, the third row seat can be folded according to the user's use requirements; when needed, the third row seat is turned over and opened; when not needed, the third row seat is folded. Among them, the seat electric turning folding action is powered by the corresponding motor module, and the motor module is generally a reduction motor assembly.

[0003] The Chinese utility model patent with patent number ZL202123240717.8 and patent name "worm gear planetary reduction motor" discloses the following technical solution: a worm gear planetary reduction motor includes a motor body and a reduction gearbox connected to the motor body. A motor shaft is provided in the motor body, and the part of the motor shaft extending into the reduction gearbox forms a worm. The reduction gearbox includes a box body and a cover plate attached to the box body. The box body is provided with a helical gear, a planetary gear structure and an output shaft that are meshed and connected with the worm. The planetary gear structure includes an inner ring gear formed integrally with the box body on the inner wall of the box body, a sun gear provided in the inner ring gear, three planetary gears provided around the sun gear and meshed and connected with the sun gear and the inner ring gear, and a planet carrier for supporting the three planetary gears. The sun gear shaft of the sun gear is inserted into the through hole of the helical gear, and the sun gear rotates with the helical gear. The output shaft is inserted into the through hole of the planet carrier, and sequentially rotates through the sun gear shaft of the sun gear and the cover plate and extends out of the box body. The worm drives the helical gear to rotate, the helical gear drives the sun gear to rotate, the sun gear drives the planetary gear to rotate, the planetary gear drives the planet carrier to rotate, and the planet carrier drives the output shaft to rotate.

[0004] When the worm gear planetary reduction motor works, the motor rotates, the worm drives the helical gear to rotate, the helical gear drives the sun gear to rotate, the sun gear drives the planetary gear to rotate, the planetary gear drives the planet carrier to rotate, and the planet carrier drives the output shaft to rotate, thereby outputting the rotation speed and torque.

[0005] It should be noted that the above-mentioned automobile seat folding drive motor module has the following defects: the automobile seat folding drive motor module adopts a single-stage planetary reduction structure, the output torque is limited and it is difficult to meet the use requirements of different automobile seat turning and folding. UTILITY MODEL CONTENTS

[0006] The utility model discloses a motor driver applied to the folding of automobile seat, which is novel in structure design, has large output torque and can be effectively applied to the folding of different automobile seats.

[0007] To achieve the above object, the utility model discloses the following technical scheme.

[0008] A motor driver applied to the folding of automobile seat, which comprises a driving motor, a reduction gearbox assembly and a power output shaft.

[0009] The reduction gearbox assembly comprises a reduction gearbox box body, and a box accommodating cavity is formed in the interior of the reduction gearbox box body.

[0010] The box accommodating cavity is embedded with a driving worm wheel and a first central gear which synchronously rotate and are sleeved on the periphery of the power output shaft.

[0011] The power output shaft is provided with a second planetary carrier, and the second planetary carrier is an integral structure with the power output shaft.

[0012] The second planetary carrier is located above the first planetary carrier, and the first planetary carrier is provided with a second central gear which is sleeved on the periphery of the power output shaft and synchronously rotates with the first planetary carrier.

[0013] The driving worm wheel and the first central gear are an integral structure.

[0014] The second central gear and the first planetary carrier are an integral structure.

[0015] The power output shaft is a hollow shaft structure.

[0016] The reduction gearbox box body comprises a main box body and a box cover which is screw-fastened to the upper end of the main box body.

[0017] The upper end and the lower end of the power output shaft are rotatably connected to the main box body and the box cover on the corresponding side through bearing bushings.

[0018] The upper end of the inner gear ring is provided with at least two gear ring protrusions arranged in a circumferential direction and respectively protruding outward, the upper end edge of the main box body is respectively provided with a box body positioning groove corresponding to each gear ring protrusion, and each gear ring protrusion of the inner gear ring is respectively positioned in the corresponding positioning groove, and the upper end surface of the inner gear ring abuts against the lower surface of the box cover.

[0019] Compared with the prior art, the speed reducer assembly of the utility model has the following beneficial effects, specifically: the double-stage planetary speed reduction structure is used to realize the speed reducer assembly, the double-stage planetary speed reduction structure can effectively improve the output torque, and thus the utility model can be effectively applied to different automobile seat folding and unfolding, so as to improve the applicability of the motor driver; therefore, the motor driver applied to the automobile seat folding has the advantages of novel structure design, large output torque and strong applicability, and can be effectively applied to different automobile seat folding and unfolding. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below by using the drawings, but the embodiments in the drawings do not constitute any limitation on the utility model.

[0021] Figure 1 It is a structural schematic view of the utility model.

[0022] Figure 2 It is an exploded schematic view of the utility model.

[0023] Figure 3 It is a cross-sectional schematic view of the utility model.

[0024] In Figures 1 to 3 It includes:

[0025] 1-drive motor;2-power output shaft;3-speed reducer box body;31-box body containing cavity;32-main box body;321-box body positioning groove;33-box cover;4-planetary speed reduction mechanism;41-inner gear ring;411-gear ring protrusion;42-first planet carrier;43-first planet wheel;44-second planet carrier;45-second planet wheel;46-second sun gear;51-driving worm;52-first sun gear;6-driving worm;7-bearing bushing. DETAILED DESCRIPTION

[0026] The utility model will be further described below by using the drawings, but the embodiments in the drawings do not constitute any limitation on the utility model.

[0027] Embodiment one, as Figures 1 to 3As shown in the figure, a motor driver applied to the folding of a car seat comprises a driving motor 1, a reduction box assembly, and a power output shaft 2. The reduction box assembly comprises a reduction box body 3, and a box accommodating cavity 31 is formed in the reduction box body 3. A planetary reduction mechanism 4 is embedded in the box accommodating cavity 31. The power output shaft 2 is rotatably installed on the reduction box body 3 and extends into the box accommodating cavity 31.

[0028] As shown in the figure, Figure 2 and Figure 3 the planetary reduction mechanism 4 comprises an inner ring gear 41 fixedly installed on the reduction box body 3, a first planet carrier 42 located on the inner side of the inner ring gear 41, and a plurality of first planet gears 43 rotatably installed on the first planet carrier 42 and engaged with the inner ring gear 41.

[0029] Further, as shown in the figure, Figure 2 and Figure 3 the box accommodating cavity 31 further embeds a driving worm wheel 51 and a first sun gear 52 which are rotatable synchronously and are sleeved on the outer periphery of the power output shaft 2. The motor output shaft of the driving motor 1 is provided with a driving worm 6 engaged with the driving worm wheel 51. The first sun gear 52 is engaged with each of the first planet gears 43.

[0030] Further, as shown in the figure, Figure 2 and Figure 3 the power output shaft 2 is provided with a second planet carrier 44 which is an integral structure with the power output shaft 2. The second planet carrier 44 is rotatably installed with a plurality of second planet gears 45 engaged with the inner ring gear 41.

[0031] In addition, the second planet carrier 44 is located above the first planet carrier 42. The first planet carrier 42 is provided with a second sun gear 46 sleeved on the outer periphery of the power output shaft 2 and rotatable synchronously with the first planet carrier 42. The second sun gear 46 is engaged with each of the second planet gears 45.

[0032] In the working process of the motor driver in the embodiment, the driving motor 1 drives the driving worm wheel 51 to rotate through the driving worm 6. Since the first sun gear 52 rotates synchronously with the driving worm wheel 51, the rotating driving worm wheel 51 drives each of the first planet gears 43 to rotate through the first sun gear 52. In this process, the first planet carrier 42 rotates. The rotating first planet carrier 42 drives each of the second planet gears 45 to rotate through the second sun gear 46, thereby driving the second planet carrier 44 to rotate. Since the second planet carrier 44 is an integral structure with the power output shaft 2, the second planet carrier 44 drives the power output shaft 2 to rotate synchronously at this time, so as to realize the power output of the power output shaft 2.

[0033] It should be emphasized that the speed reducer assembly of the first embodiment is achieved by a two-stage planetary speed reduction structure, which can effectively improve the output torque, and thus the motor driver for folding the automobile seat of the first embodiment can be effectively applied to different automobile seat folding, thereby improving the applicability of the motor driver.

[0034] In addition, the power output shaft 2 and the second planet carrier 44 of the integrated structure design can improve the assembly convenience, and on the other hand, can effectively increase the overall strength and reliability.

[0035] In summary, the motor driver for folding the automobile seat of the first embodiment has the advantages of novel structure design, large output torque and strong applicability, and can be effectively applied to different automobile seat folding.

[0036] The second embodiment, as shown in Figure 2 and Figure 3 The difference between the second embodiment and the first embodiment is that the drive worm gear 51 and the first sun gear 52 are integrated.

[0037] For the integrated structure design of the drive worm gear 51 and the first sun gear 52, on the one hand, it can effectively ensure the synchronous rotation of the two, on the other hand, it can effectively increase the overall strength and reliability, and can improve the assembly convenience.

[0038] The third embodiment, as shown in Figure 2 and Figure 3 The difference between the third embodiment and the first embodiment is that the second sun gear 46 and the first planet carrier 42 are integrated.

[0039] For the integrated structure design of the second sun gear 46 and the first planet carrier 42, on the one hand, it can effectively ensure the synchronous rotation of the two, on the other hand, it can effectively increase the overall strength and reliability, and can improve the assembly convenience.

[0040] The fourth embodiment, as shown in Figure 2 The difference between the fourth embodiment and the first embodiment is that the power output shaft 2 is a hollow shaft structure.

[0041] It should be explained that the power output shaft 2 of the fourth embodiment adopts a hollow structure design, and the power output shaft 2 of the structure design can effectively improve the heat dissipation capacity of the product, thereby improving the reliability of the product.

[0042] The fifth embodiment, as shown in Figure 3As shown in the figure, the embodiment five is different from the embodiment one in that the reduction gearbox housing 3 comprises a main housing 32 and a housing cover 33 screw-fastened to the upper end of the main housing 32, the housing accommodating cavity 31 is jointly enclosed by the main housing 32 and the housing cover 33, and the driving motor 1 is screw-fastened to the main housing 32.

[0043] The upper end and the lower end of the power output shaft 2 are respectively rotationally connected with the main housing 32 and the housing cover 33 of the corresponding side through the bearing bush 7.

[0044] As shown in the figure, the embodiment six is different from the embodiment five in that the upper end of the inner ring gear 41 is provided with at least two tooth ring blocks 411 which are arranged in a circumferential direction and protrude outward, the upper end edge of the main housing 32 is provided with a housing positioning groove 321 corresponding to each tooth ring block 411, and each tooth ring block 411 of the inner ring gear 41 is embedded and positioned in the corresponding positioning groove, and the upper end surface of the inner ring gear 41 abuts against the lower surface of the housing cover 33. Figures 1 to 3 Figures 1 to 3 Figures 1 to 3

[0045] The inner ring gear 41 of the embodiment six is independent of the main housing 32, in the process of installing the inner ring gear 41 in the housing accommodating cavity 31, the inner ring gear 41 is inserted into the housing accommodating cavity 31, and each tooth ring block 411 of the inner ring gear 41 is embedded in the corresponding housing positioning groove 321, so as to realize the rotationally connected between the inner ring gear 41 and the main housing 32, and the positioning and fastening of the inner ring gear 41 is realized through the vertical positioning of the housing and the housing cover 33.

[0046] The above is only the preferred embodiment of the present application, for the ordinary skilled in the art, according to the idea of the present application, the specific embodiment and the application range will be changed, the content of the specification should not be understood as the limitation of the present application.​

Claims

1. A motor driver applied to folding of a car seat, comprising a driving motor (1), a reduction gearbox assembly, and a power output shaft (2), the reduction gearbox assembly comprising a reduction gearbox box body (3), the inside of the reduction gearbox box body (3) being shaped into a box accommodating cavity (31), and a planetary reduction mechanism (4) being embedded in the box accommodating cavity (31), the power output shaft (2) being rotatably installed on the reduction gearbox box body (3) and extending into the box accommodating cavity (31); the planetary reduction mechanism (4) comprising an inner ring gear (41) fastened to the reduction gearbox box body (3), a first planet carrier (42) located on the inner side of the inner ring gear (41), the first planet carrier (42) being sleeved on the periphery of the power output shaft (2), and the first planet carrier (42) being rotatably installed with a plurality of first planet gears (43) respectively engaged with the inner ring gear (41); the box accommodating cavity (31) further embedding a driving worm wheel (51) and a first central gear (52) which are synchronously rotatable and are respectively sleeved on the periphery of the power output shaft (2), the motor output shaft of the driving motor (1) being provided with a driving worm (6) engaged with the driving worm wheel (51), and the first central gear (52) being engaged with each of the first planet gears (43); characterized in that the power output shaft (2) being provided with a second planet carrier (44) which is an integral structure with the power output shaft (2), and the second planet carrier (44) being rotatably installed with a plurality of second planet gears (45) respectively engaged with the inner ring gear (41); the second planet carrier (44) being located above the first planet carrier (42), the first planet carrier (42) being provided with a second central gear (46) sleeved on the periphery of the power output shaft (2) and synchronously rotatable with the first planet carrier (42), and the second central gear (46) being engaged with each of the second planet gears (45).

2. The motor driver applied to folding of a car seat according to claim 1, characterized in that: The driving worm wheel (51) and the first central gear (52) are an integral structure.

3. The motor driver applied to folding of a car seat according to claim 1, characterized in that: The second central gear (46) and the first planet carrier (42) are an integral structure.

4. The motor driver applied to folding of a car seat according to claim 1, characterized in that: The power output shaft (2) is a hollow shaft structure.

5. The motor driver applied to folding of a car seat according to claim 1, characterized in that: The reduction gearbox box body (3) comprises a main box body (32) and a box cover (33) screw-fastened to the upper end of the main box body (32), the box accommodating cavity (31) being formed by the main box body (32) and the box cover (33) together, and the driving motor (1) being screw-fastened to the main box body (32); the upper end and the lower end of the power output shaft (2) being rotatably connected with the main box body (32) and the box cover (33) on the corresponding side through a bearing bush (7).

6. The motor driver applied to folding of a car seat according to claim 5, characterized in that: The upper end of the inner ring gear (41) is provided with at least two ring gear protrusions (411) which are circumferentially spaced and respectively protrude outward, the upper end edge of the main box body (32) is respectively provided with a box positioning groove (321) corresponding to each of the ring gear protrusions (411), each of the ring gear protrusions (411) of the inner ring gear (41) is respectively embedded and positioned in the corresponding positioning groove, and the upper end face of the inner ring gear (41) is abuttingly limited on the lower surface of the box cover (33).

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