Improved electric angle adjusting driver for automobile seat backrest

Abstract

The utility model discloses an improved automobile seat backrest electric angle adjusting driver which comprises a driving motor, a middle speed reducer, an output screw and a movable sliding block which are sequentially connected in a driving mode, the middle speed reducer comprises a speed reducer box body, and a speed reducing assembly is embedded in a box body containing cavity of the speed reducer box body. A power output shaft of the driving motor and the output screw are arranged in parallel at intervals, the speed reduction assembly comprises a transmission part, and the transmission part is perpendicular to the power output shaft of the driving motor and the output screw; the transmission piece is provided with a turbine part and a worm part; a power output shaft of the driving motor is provided with a driving worm located in the containing cavity of the box body, and the driving worm is meshed with the worm gear part of the transmission piece. A driving worm gear located in the containing cavity of the box body is arranged at the end of the output screw, and the worm part of the transmission piece is meshed with the driving worm gear. Through the structural design, the self-locking device has the advantages of being novel in structural design and good in self-locking stability.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to an improved electric angle adjustment driver for automotive seat backrests. Background Technology

[0002] For the rear seat backrests of cars, in order to meet the comfort requirements of passengers, the seat backrest angle needs to be adjustable, and the seat backrest angle adjustment is driven by the corresponding seat backrest angle adjustment driver.

[0003] Chinese utility model patent application with patent number ZL202411360519.0 and patent name: "An Electric Adjuster for Car Seat Backrests" discloses the following technical solution: An electric adjuster for car seat backrests includes an adjustment plate, an arc-shaped guide rail at the upper end of the adjustment plate, a guide rod slidably connected inside the arc-shaped guide rail, one end of the guide rod connected to a slider, a locking hook connected to one side of the slider, the locking hook being used to fix it to one side of the car seat backrest, and a transmission mechanism installed at one end of the adjustment plate, the transmission mechanism causing the locking hook to rotate the car seat backrest to adjust its usage angle; the transmission mechanism includes a motor installed at one end of the adjustment plate, the motor driving a gearbox, the output shaft of the gearbox being coaxially connected to a lead screw, and the lead screw being threadedly connected to the slider.

[0004] In the process of adjusting the angle of the car seat back using the aforementioned electric car seat back adjuster, the lead screw starts to rotate under the drive of the motor, and the slider moves along a specific path under the guidance of the guide rod, thereby adjusting the angle of the seat back.

[0005] It should be noted that the above-mentioned electric adjustable backrest of car seats still has the following defects: When working, the motor drives the lead screw to rotate after being reduced in speed by the gearbox. Since the gearbox cannot achieve effective self-locking, when the seat back is adjusted to the required angle position, the passenger's leaning or movement will cause the seat back to bear a large pushing force. Due to the inability to effectively self-lock, the seat back will shift under the large pushing force, resulting in poor stability. Utility Model Content

[0006] The purpose of this invention is to provide an improved electric angle adjustment actuator for car seat backrests to address the shortcomings of existing technologies. This improved electric angle adjustment actuator for car seat backrests has a novel structural design and good self-locking stability.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0008] An improved electric angle adjustment driver for a car seat back includes a drive motor, an intermediate reducer, an output screw, and a movable slider. The drive motor, intermediate reducer, and output screw are sequentially connected and driven. The movable slider has a through-hole internal threaded hole corresponding to the output screw. The output screw passes through the internal threaded hole of the slider and is threadedly connected to the movable slider.

[0009] The intermediate reducer includes a reducer housing, the inside of which is formed a housing cavity, and a reduction gear assembly is embedded in the housing cavity.

[0010] The power output shaft of the drive motor and the output screw are arranged parallel and spaced apart. The reduction assembly includes a transmission component rotatably mounted on the reducer housing. The transmission component is perpendicular to the power output shaft of the drive motor and the output screw, respectively.

[0011] One end of the transmission component is provided with a turbine section, and the other end of the transmission component is provided with a worm section; the power output shaft of the drive motor is equipped with a drive worm located in the housing cavity, and the drive worm meshes with the worm wheel section of the transmission component; the end of the output screw is equipped with a drive worm wheel located in the housing cavity, and the worm section of the transmission component meshes with the drive worm wheel.

[0012] The transmission component, the worm gear, and the worm shaft are integrated into a single structure.

[0013] The side wall of the housing cavity is provided with an outwardly opening housing mounting hole corresponding to the inner end of the output screw. A bearing and an adjusting nut are embedded in the housing mounting hole. The inner hole of the bearing is a threaded hole structure, and the adjusting nut is screwed into the inner hole of the bearing.

[0014] The adjusting nut is equipped with a wear-resistant pad, which contacts the end face of the inner end of the output screw.

[0015] The adjusting nut has a nut receiving cavity that opens toward the output screw side, and the wear-resistant pad is positioned and embedded in the nut receiving cavity of the adjusting nut.

[0016] The inner end face of the output screw is provided with a contact protrusion protruding toward the wear-resistant pad, and the wear-resistant pad contacts the contact protrusion.

[0017] The reducer housing includes a main housing and a cover screwed onto the main housing. The housing cavity is opened in the main housing, and the cover is located at the opening of the main housing.

[0018] The housing of the drive motor is screwed and fastened to the main housing, and the output screw is rotatably mounted on the main housing.

[0019] Compared with existing technologies, this utility model has the following advantages: Specifically, the intermediate reducer achieves speed reduction transmission through a first worm gear pair composed of a driving worm and a worm wheel, and a second worm gear pair composed of a worm and a driving worm wheel. Since each worm gear pair has a self-locking capability, the aforementioned double worm gear pair combination structure can achieve a double self-locking function. When the seat back is adjusted to the desired angle position, the double self-locking component formed by this double worm gear pair combination structure allows the seat back to withstand a large thrust, preventing displacement of the seat back under a large thrust and ensuring good stability. Therefore, this utility model has the advantages of novel structural design and good self-locking stability. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model.

[0022] Figure 2 This is an exploded view of the present invention.

[0023] Figure 3 This is an exploded view of the present invention from another perspective.

[0024] Figure 4 This is a partial cross-sectional schematic diagram of the present invention.

[0025] exist Figures 1 to 4 This includes:

[0026] 1-Drive motor; 11-Power output shaft; 2-Intermediate reducer; 21-Reducer housing;

[0027] 211-Main housing; 212-Housing cover; 22-Housing housing cavity; 23-Reduction assembly; 231-Transmission component; 2311-Worm gear; 2312-Worm part; 232-Drive worm; 233-Drive worm wheel; 3-Output screw; 31-Contact protrusion; 4-Modible slider; 51-Bearing; 52-Adjusting nut; 521-Nut housing cavity; 53-Wear-resistant pad. Detailed Implementation

[0028] The present invention will now be described in conjunction with specific embodiments.

[0029] Example 1, as Figures 1 to 4As shown, an improved electric angle adjustment driver for a car seat back includes a drive motor 1, an intermediate reducer 2, an output screw 3, and a movable slider 4. The drive motor 1, the intermediate reducer 2, and the output screw 3 are sequentially connected and driven. The movable slider 4 has a through-hole (not shown in the figure) corresponding to the output screw 3. The output screw 3 passes through the internal thread hole of the slider and is threadedly connected to the movable slider 4.

[0030] Among them, such as Figures 1 to 4 As shown, the intermediate reducer 2 includes a reducer housing 21, and the reducer housing 21 has a housing cavity 22 formed inside, and the reducer assembly 23 is embedded in the housing cavity 22.

[0031] Furthermore, such as Figure 2 and Figure 3 As shown, the power output shaft 11 of the drive motor 1 is arranged parallel to and spaced apart from the output screw 3. The reduction assembly 23 includes a transmission component 231 rotatably mounted on the reducer housing 21. The transmission component 231 is perpendicular to the power output shaft 11 of the drive motor 1 and the output screw 3, respectively.

[0032] Furthermore, such as Figures 2 to 4 As shown, a turbine section is provided at one end of the transmission component 231, and a worm section 2312 is provided at the other end of the transmission component 231; the power output shaft 11 of the drive motor 1 is equipped with a drive worm 232 located in the housing cavity 22, and the drive worm 232 meshes with the worm wheel section 2311 of the transmission component 231; the end of the output screw 3 is equipped with a drive worm wheel 233 located in the housing cavity 22, and the worm section 2312 of the transmission component 231 meshes with the drive worm wheel 233.

[0033] In the process of sliding the movable slider 4 in the improved electric angle adjustment driver of the car seat back in this embodiment, the drive motor 1 drives the drive worm 232 to rotate through its power output shaft 11. The drive worm 232 then drives the transmission component 231 to rotate through the worm wheel 2311. The transmission component 231 then drives the drive worm wheel 233 through the worm 2312, so that the output screw 3 rotates. The output screw 3 and the movable slider 4 together form a threaded transmission pair structure, that is, the rotating output screw 3 drives the movable slider 4 to slide.

[0034] It should be noted that the intermediate reducer 2 in this embodiment achieves speed reduction transmission through a first worm gear pair composed of a driving worm 232 and a worm wheel portion 2311, and a second worm gear pair composed of a worm portion 2312 and a driving worm wheel 233. This dual worm gear pair combination structure effectively increases the output torque of the drive motor 1, thereby effectively increasing the driving thrust of the movable slider 4. Furthermore, since each worm gear pair has a self-locking capability, the dual worm gear pair combination structure can achieve a double self-locking function. When the improved electric angle adjustment driver for the car seat backrest in this embodiment adjusts the seat backrest to the desired angle position, the double self-locking component formed by this dual worm gear pair combination structure allows the seat backrest to withstand a large thrust, preventing displacement of the seat backrest under a large thrust and ensuring good stability.

[0035] In summary, the improved electric angle adjustment driver for the car seat backrest in this embodiment has the advantages of novel structural design and good self-locking stability through the above structural design.

[0036] Example 2, as Figure 2 and Figure 3 As shown, the difference between this embodiment 2 and embodiment 1 is that the transmission component 231, the worm gear part 2311, and the worm part 2312 are an integral structure.

[0037] Example 3, as Figures 2 to 4 As shown, the difference between this embodiment 3 and embodiment 1 is that: the side wall of the housing cavity 22 is provided with an outwardly opening housing mounting hole corresponding to the inner end of the output screw 3. The housing mounting hole is fitted with a bearing 51 and an adjusting nut 52. The inner hole of the bearing 51 is a threaded hole structure, and the adjusting nut 52 is screwed into the inner hole of the bearing 51.

[0038] The adjusting nut 52 is equipped with a wear-resistant pad 53, which is in contact with the end face of the inner end of the output screw 3.

[0039] For the output screw 3 in this embodiment, during operation, the adjusting nut 52 can be rotated to move axially relative to the bearing 51, thereby causing the adjusting nut 52 and the wear-resistant pad 53 to move along the axial direction of the output screw 3, so as to ensure that the wear-resistant pad 53 and the end face of the inner end of the output screw 3 maintain abutting contact.

[0040] It should be emphasized that during the use of the improved electric angle adjustment driver for car seat backrest in this embodiment three, when the output screw 3 becomes axially loose, the user can rotate the adjusting nut 52 to keep the wear-resistant pad 53 in abutting contact with the end face of the inner end of the output screw 3, so as to eliminate the axial looseness and restore the output screw 3 to a stable state. This can effectively improve the axial impact resistance of the product, that is, the improved electric angle adjustment driver for car seat backrest in this embodiment three can effectively improve the stability of later use.

[0041] Example 4, as Figure 4 As shown, the difference between this embodiment 4 and embodiment 3 is that the adjusting nut 52 has a nut receiving cavity 521 that opens toward the output screw 3, and the wear-resistant pad 53 is positioned and embedded in the nut receiving cavity 521 of the adjusting nut 52.

[0042] When the rotating output screw 3 comes into frictional contact with the wear-resistant pad 53, the nut receiving cavity 521 can effectively limit the wear-resistant pad 53 to ensure the stability of the position of the wear-resistant pad 53.

[0043] Example 5, such as Figure 4 As shown, the difference between this embodiment 5 and embodiment 3 is that the end face of the inner end of the output screw 3 is provided with a contact protrusion 31 protruding toward the wear-resistant pad 53, and the wear-resistant pad 53 contacts the contact protrusion 31.

[0044] By contacting the contact protrusion 31 and the wear-resistant pad 53, this fifth embodiment can effectively reduce the contact area between the rear end of the output screw 3 and the wear-resistant pad 53, thereby reducing the resistance to the rotation of the output screw 3 and improving the smoothness of the rotation of the output screw 3.

[0045] Example 6, as Figures 1 to 4 As shown, the difference between this sixth embodiment and the first embodiment is that the reducer housing 21 includes a main housing 211 and a housing cover 212 screwed onto the main housing 211. The housing cavity 22 is opened in the main housing 211, and the housing cover 212 is located at the opening of the main housing 211.

[0046] The drive motor 1 is screwed into the main housing 211, and the output screw 3 is rotatably mounted on the main housing 211.

[0047] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An improved automobile seat backrest electric angle adjustment driver, comprising a driving motor (1), an intermediate speed reducer (2), an output screw rod (3) and a movable slider (4), the driving motor (1), the intermediate speed reducer (2) and the output screw rod (3) are sequentially drivingly connected; the movable slider (4) is provided with a through slider inner threaded hole corresponding to the output screw rod (3), the output screw rod (3) passes through the slider inner threaded hole and is threadedly connected with the movable slider (4); the intermediate speed reducer (2) comprises a speed reducer box body (21), an inner cavity (22) is formed in the speed reducer box body (21), and a speed reduction assembly (23) is embedded in the inner cavity (22); characterized in that a power output shaft (11) of the driving motor (1) is arranged in parallel with the output screw rod (3) with a spacing, the speed reduction assembly (23) comprises a transmission member (231) rotatably installed on the speed reducer box body (21), and the transmission member (231) is perpendicular to the power output shaft (11) of the driving motor (1) and the output screw rod (3) respectively; one end of the transmission member (231) is provided with a worm wheel part, and the other end of the transmission member (231) is provided with a worm part (2312); the power output shaft (11) of the driving motor (1) is provided with a driving worm (232) located in the inner cavity (22) of the speed reducer box body (21), the driving worm (232) is engaged with the worm wheel part (2311) of the transmission member (231); and an end of the output screw rod (3) is provided with a driving worm wheel (233) located in the inner cavity (22) of the speed reducer box body (21), and the worm part (2312) of the transmission member (231) is engaged with the driving worm wheel (233).

2. The improved electric drive for angle adjustment of a backrest of a car seat according to claim 1, characterized in that: The transmission member (231), the worm wheel part (2311) and the worm part (2312) are an integral structure.

3. The improved electric drive for angle adjustment of a backrest of a car seat according to claim 1, characterized in that: A box mounting hole opening outward is formed in a side wall of the inner cavity (22) corresponding to an inner end of the output screw rod (3), a bearing (51) and an adjusting nut (52) are embedded in the box mounting hole, an inner hole of the bearing (51) is a threaded hole structure, and the adjusting nut (52) is screwed into the inner hole of the bearing (51). The adjusting nut (52) is provided with a wear-resistant pad (53), and the wear-resistant pad (53) is in contact with an end face of the inner end of the output screw rod (3).

4. The improved electric drive for angle adjustment of a backrest of a car seat according to claim 3, characterized in that: The adjusting nut (52) is provided with a nut accommodating cavity (521) opening to the side of the output screw rod (3), and the wear-resistant pad (53) is positioned and embedded in the nut accommodating cavity (521) of the adjusting nut (52).

5. The improved electric drive for angle adjustment of a backrest of a car seat according to claim 3, characterized in that: An end face of the inner end of the output screw rod (3) is provided with a contact protrusion (31) protruding to the side of the wear-resistant pad (53), and the wear-resistant pad (53) is in contact with the contact protrusion (31).

6. The improved electric drive for angle adjustment of a backrest of a car seat according to claim 1, characterized in that: The speed reducer box body (21) comprises a main box body (211) and a box cover (212) screw-fastened to the main box body (211), the inner cavity (22) is formed in the main box body (211), and the box cover (212) is located at an opening position of the main box body (211); an outer shell of the driving motor (1) is screw-fastened to the main box body (211), and the output screw rod (3) is rotatably installed on the main box body (211).

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