Electric linear adjusting device for back row seat backrest of vehicle

Abstract

The utility model discloses an electric linear adjusting device for a back row seat backrest of a vehicle, and belongs to the technical field of vehicle seats. Comprising a base frame which comprises a base frame main panel and two base frame side panels; a power mechanism; the transmission lead screw assembly comprises a lead screw body and a sliding nut seat, and the lead screw body is in transmission connection with the power mechanism; the adjusting frame body is arranged on the sliding nut seat in a sleeving manner; the guide rod assembly comprises a plurality of guide rod bodies, the guide rod bodies penetrate through the adjusting frame body and can guide and support the movement of the adjusting frame body, and guide rod spring washers are further arranged at the joints of the guide rod bodies and the two base frame side panels in a matched mode; the lock hook piece is fixedly connected to the adjusting frame body and used for being connected with a lock catch installed on a backrest of the vehicle seat; the device has the advantages of being compact in structure, high in strength, good in bearing capacity, good in use comfort level, stable and reliable in operation, easy and convenient to manufacture and convenient to install, and achieving electric continuous adjustment of the back row seat backrest of the vehicle within a certain range.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle seats, and in particular relates to an electric linear adjustment device for a vehicle rear seat backrest. Background Art

[0002] With the development of society and the improvement of people's living standards, the development of the automobile industry has been rapid, and people's requirements for various vehicle riding performance, riding comfort and interior space have been increasing. Car seats are important components in car interiors, providing comfort for passengers while protecting their safety. The comfort of vehicle seats can directly affect the riding experience of drivers and passengers. The reasonable angle between the seat back and the seat cushion can provide drivers and passengers with a good comfort experience, and can also bring drivers and passengers a driving experience that is easy to operate and not easy to fatigue. In the design process of vehicle seats, in order to adapt to the driving experience of people of different heights and body shapes, the angle between the seat back and the seat cushion is usually adjustable. Therefore, the vehicle will be equipped with a seat back adjustment device for adjusting the angle between the seat back and the seat cushion. Drivers and passengers can adjust the angle of the seat back by operating the adjustment handle so that the seat back can move to a position where the driver and passengers feel more comfortable, thereby improving the comfort of the driver and passengers. However, the rear seats currently on the market are usually fixed and cannot be adjusted. Only the rear seats of some high-end SUVs, MPVs and some large executive-class sedans have angle adjustment functions, and the rear seats of these high-end vehicles are often also equipped with existing seat back adjustment devices similar to the front seats, which usually adjust the angle of the recliner through power transmission between two straight rods, thereby adjusting the angle between the seat back and the seat cushion, so that the movement trajectory of the straight rod rotating around the fixed fulcrum easily occupies a large space on the seat back, so that the seat back is difficult to provide sufficient space for other functional modules, resulting in reduced functionality of the seat. Therefore, it is not suitable for angle adjustment of rear vehicle seats and cannot meet diversified usage needs.

[0003] To this end, existing vehicle parts manufacturers have made useful attempts and developed an angle adjustment device that realizes the rotation of the rear seat backrest through a lock hook and a lock buckle. Specifically, the backrest of the rear seat will be connected to a lock buckle, and the lock buckle is connected to a lock hook for fixing the backrest. The lock hook fixes the inclination angle of the backrest by fixing the lock buckle. When the lock buckle and the lock hook are unlocked, the user needs to manually adjust the inclination angle of the car seat backrest, which is troublesome to operate, and the inclination angle is not easy to control and adjust. In addition, the deflection angle often cannot be adjusted continuously, and the personalized needs of the passengers themselves cannot be met, which makes the whole The riding comfort needs to be improved urgently, and the matching specifications between the lock and the lock hook are often one-to-one, which makes the lock hook unable to be applied to lock components of different specifications, resulting in poor applicability and high production cost; in addition, existing manufacturers have also developed lock-type rear seat back adjustment mechanisms that can realize electric adjustment, but they generally have the problems of complex overall structure, large number of components, and occupying more space, and are also very inconvenient to assemble. There are often large gaps between the components, and shaking and shaking are prone to occur during operation, accompanied by abnormal sounds and noises, poor comfort in use, and poor reliability in operation.

[0004] In view of the above situation, it is necessary to design a vehicle rear seat backrest adjustment mechanism that is smooth and reliable to use, firmly connected and has a wide range of applications. For this reason, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0005] The task of the utility model is to provide an electric linear adjustment device for a vehicle seat backrest with a compact structure, high strength and good load-bearing capacity, which is helpful to realize electric quick and continuous adjustment of the vehicle rear seat backrest within a certain range and improve the comfort of use by optimizing the overall structure, is beneficial to achieve a firm and reliable positioning and fixing effect on the transmission screw assembly, thereby reducing the gap between the components and ensuring the tightness of the combination and reliable and stable use, is beneficial to ensure the smoothness of operation by arranging a spring pad at the connection between the guide rod body and the base frame, and is convenient to arrange a locking component that can be locked with locks of different specifications on the seat, thereby improving the scope of application and facilitating manufacturing and installation.

[0006] The task of the utility model is accomplished in this way: an electric linear adjustment device for a rear seat backrest of a vehicle comprises: a base frame, the base frame comprises a base frame main panel and base frame side panels which are vertically formed at both ends of the length direction of the base frame main panel; a power mechanism, the power mechanism is arranged at the outer position of one of the base frame side panels of the base frame, and the power mechanism is fixedly connected to the base frame side panels; a transmission screw rod assembly, the transmission screw rod assembly comprises a screw rod body and a sliding nut seat which is threadedly connected to the screw rod body, the screw rod body is pivotally connected to the two base frame side panels in a state parallel to the length direction of the base frame main panel, and one end of the screw rod body in the length direction passes out of the base frame body and probes into the power mechanism The cam is an assembly of a plurality of guide rod bodies, each of which is installed in a state parallel to the length direction of the screw rod body, and the guide rod body passes through the adjustment frame and can guide and support the movement of the adjustment frame, and a guide rod spring pad is also provided at the connection between the guide rod body and the side panel of the base frame; a lock hook is fixedly connected to the adjustment frame, and the lock hook is used to connect with a lock buckle installed on a vehicle seat back.

[0007] In a specific embodiment of the present invention, the adjusting frame includes an adjusting frame main connecting plate and a pair of adjusting frame side plates maintained in a perpendicular state with the adjusting frame main connecting plate; wherein the adjusting frame main connecting plate is extended to maintain parallel with the base frame main panel, and the two adjusting frame side plates are arranged on both sides of the adjusting frame main connecting plate, and the adjusting frame side plates are maintained in a parallel state with the base frame side panels; the locking hook is in a U-shaped structure, and the two leg ends of the locking hook are respectively formed as a locking hook connecting end, and the two locking hook connecting ends are both mounted on the adjusting frame main connecting plate, thereby realizing the fixed installation of the locking hook and the adjusting frame; and on the adjusting frame main connecting plate and the two The cam body is provided with a plurality of guide rods, each of which is provided with a plurality of guide rods, each of which is provided with a plurality of guide rods having a plurality of guide rods, each of which is provided with a plurality of guide rods having a plurality of guide rods.

[0008] In another specific embodiment of the utility model, a pair of sliding nut seat protection arms are protrudingly formed on the sliding nut seat, and the two sliding nut seat protection arms are symmetrically arranged with the length direction of the screw rod body as the center line, and the two sliding nut seat protection arms are obliquely extended to a position close to the main connecting plate of the adjusting frame body, and the sliding nut seat protection arm protection pad is also provided on the side surface of the adjusting frame body main connecting plate facing the inner cavity of the adjusting frame body and at a position corresponding to the end portion of the sliding nut seat protection arm away from the sliding nut seat body. There is a distance between the end portion of the sliding nut seat protection arm away from the sliding nut seat body and the sliding nut seat protection arm protection pad. When the sliding nut seat moves in a circumferential direction during the movement, the end portion of the sliding nut seat protection arm away from the sliding nut seat body can abut against the sliding nut seat protection arm protection pad, thereby realizing the limitation of the circumferential movement of the sliding nut seat.

[0009] In another specific embodiment of the present invention, a plurality of guide rod positioning holes are provided on the side panel of the base frame close to the power mechanism and at positions corresponding to the plurality of guide rod bodies, the plurality of guide rod bodies are cooperated and penetrated in the corresponding guide rod positioning holes, and guide rod positioning hole bushings are provided in the guide rod positioning holes, and the guide rod positioning hole bushings are assembled on the guide rod bodies; a plurality of guide rod limiting holes are provided on the side panel of the base frame away from the power mechanism and at positions corresponding to the plurality of guide rod bodies, and a guide rod body end portion is formed at one end portion of the guide rod body that passes through the guide rod limiting hole in the length direction of the guide rod body, the guide rod body end portion is circular in shape and its radial diameter is larger than the diameter of the guide rod limiting hole, and the guide rod spring washer is assembled on the guide rod body at a position between the guide rod body end portion and the side panel of the base frame.

[0010] In another specific embodiment of the present invention, the power mechanism includes a driving motor and a transmission gear box connected to the power output end of the driving motor, the transmission gear assembly inside the transmission gear box is connected to the power output shaft of the driving motor, and the power mechanism also includes a plurality of fixed columns, which are connected between the side panel of the frame and the driving motor or between the side panel of the frame and the transmission gear box, and realize the fixed connection between the driving motor and the frame body and the transmission gear box and the frame body.

[0011] In another specific embodiment of the utility model, a screw gear shaft segment is formed on one end portion of the screw body in the length direction, and the screw gear shaft segment extends into the transmission gear box of the power mechanism, and the screw gear shaft segment is connected to the transmission gear assembly inside the transmission gear box to achieve transmission connection, so that the power mechanism can drive the screw body to rotate.

[0012] In a further specific embodiment of the present invention, a screw rod clearance hole is provided on a side panel of the base frame close to the power mechanism, which runs through the side panel in the thickness direction. The shape and size of the screw rod clearance hole are adapted to the shape and size of the screw rod body, and the screw rod body is inserted into the screw rod clearance hole and rotates with the side panel of the base frame. A screw rod clearance hole bushing is also provided in the screw rod clearance hole, and the screw rod clearance hole bushing is sleeved on the screw rod body; and a screw rod stop block is convexly provided on the outer peripheral surface of the rod body of the screw rod body and at a position corresponding to the position close to the power mechanism. The screw rod stop block is fitted at the outer position of the side panel of the base frame close to the power mechanism, and the screw rod stop block is used to realize the axis of the screw rod body. Directional positioning; and a screw connecting section is also formed at the end portion of the screw body in the length direction away from the power mechanism, the screw connecting section is cylindrical and coaxially arranged with the screw body, the radial diameter of the screw connecting section is smaller than the radial diameter of the rod body of the screw body, and a base side panel connecting hole that runs through the thickness direction is provided on a side panel of the base frame away from the power mechanism, the shape and size of the base side panel connecting hole are adapted to the shape and size of the screw connecting section, and the screw connecting section is inserted into the base side panel connecting hole and rotatably cooperates with the base side panel, and a base side panel connecting hole bushing is also provided in the base side panel connecting hole, and the base side panel connecting hole bushing is sleeved on the screw body.

[0013] In a more specific embodiment of the present invention, a screw positioning seat is also provided on the base frame, and the screw positioning seat is fixedly mounted on a side panel of the base frame away from the power mechanism, and the screw positioning seat is fixedly mounted on the inner side surface of the side panel of the base frame facing the power mechanism through a plurality of screw positioning seat fasteners, and the screw body passes through the screw positioning seat and is rotationally connected thereto.

[0014] In a further specific embodiment of the present invention, a screw rod limiting section is also formed on the screw rod body, and the screw rod limiting section is constituted by a base frame side panel which is located at a side position of the screw rod connecting section away from the screw rod and protrudes outward from the base frame. The screw rod limiting section is coaxially arranged with the screw rod connecting section, and a screw rod limiting section nut seat is also arranged on the screw rod limiting section, and a screw rod limiting section elastic washer and a screw rod limiting section flat washer are also arranged between the screw rod limiting section nut seat and the base frame side panel, the screw rod limiting section elastic washer and the screw rod limiting section flat washer are both assembled on the screw rod limiting section and can slide along the direction of the screw rod limiting section, the screw rod limiting section flat washer is fit-fittingly arranged on an outer surface of the base frame side panel opposite to the power mechanism, and the screw rod limiting section elastic washer is arranged between the screw rod limiting section flat washer and the screw rod limiting section nut seat.

[0015] In a specific embodiment of the present invention, a base mounting frame is further provided on the base main panel of the base, and the base mounting frame is used to fix the base body on the vehicle seat.

[0016] The beneficial effects of the utility model are as follows: first, the technical solution utilizes a power mechanism to drive the transmission screw assembly to move, and enables the adjustment frame and the locking member to move along the screw body and the guide rod, and the locking member drives the lock assembled on the vehicle seat back to move, thereby realizing the electric continuous adjustment of the vehicle rear seat back within a certain range, realizing efficient automatic adjustment, and the passengers can adjust it in time according to their needs. The adjustment process is fast and smooth, and does not require human drive, and the operation is labor-saving, which can improve the comfort of the car seat back adjustment process; second, the electric linear device has a compact structure, occupies a small space and is easy to assemble. At the same time, the components are firmly combined and have high impact bearing performance. At the same time, the use gap is small, which ensures the stability and reliability of the movement, effectively reduces the occurrence of noise, and there is no abnormal sound during the operation of the product, and the operation is further stable and reliable; third, by optimizing the structure of the screw body, and forming a screw stop block and a screw on the screw body. The limiting section, and the use of the screw positioning seat and the screw limiting section nut seat effectively ensure the stability of the overall axial positioning of the screw body. At the same time, by forming a sliding nut seat protection arm on the sliding nut seat, the sliding nut seat is effectively prevented from moving during operation, effectively reducing the occurrence of shaking and swaying of the transmission screw assembly, which is beneficial to improving the comfort of the adjustment process and riding state; Fourth, by arranging a spring pad at the connection between the guide rod body and the base frame, a buffer is achieved between the guide rod body and the base frame, and the vibration energy of the guide rod body during operation is effectively absorbed, effectively reducing the vibration and impact force during operation and when the vehicle is driving, and further ensuring the stability and safety of use; Fifth, the lock hook installed on the adjustment frame can be locked with different locks. Compared with traditional electric adjusters, this technical solution has more cost advantages when applied to rear seats, and makes adjustment easier. At the same time, it is easy to manufacture and install, and has significant promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure decomposition of the utility model;

[0019] Figure 3 It is a schematic diagram of the overall structure of the utility model at another angle.

[0020] In the figure: 1. base frame, 11. base frame main panel, 12. base frame side panel, 121. guide rod positioning hole, 1211. guide rod positioning hole bushing, 122. guide rod limiting hole, 123. screw rod clearance hole, 1231. screw rod clearance hole bushing, 124. base frame side panel connecting hole, 1241. base frame side panel connecting hole bushing, 13. screw rod positioning seat, 131. screw rod positioning seat fastener; 2. power mechanism, 21. drive motor, 22. transmission gear box, 23. fixed column; 3. transmission screw assembly, 31. screw rod body, 311. screw rod gear shaft section, 312. screw rod stop block, 313. screw rod connecting section, 314. screw rod Limiting section, 3141. Screw rod limiting section nut seat, 3142. Screw rod limiting section spring washer, 3143. Screw rod connecting section flat washer, 32. Sliding nut seat, 321. Sliding nut seat protection arm; 4. Adjusting frame, 41. Adjusting frame main connecting plate, 411. Sliding nut seat protection arm buffer pad, 42. Adjusting frame side plate, 421. Screw rod perforation, 422. Guide rod perforation, 4221. Guide rod perforated bushing, 43. Adjusting frame inner cavity; 5. Guide rod assembly, 51. Guide rod body, 511. Guide rod body end portion, 52. Guide rod spring washer; 6. Lock hook, 61. Lock hook connecting end; 7. Base frame mounting skeleton. DETAILED DESCRIPTION

[0021] The following will be described in detail in the form of embodiments, but the description of the embodiments is not a limitation of the scheme of the utility model. Any equivalent changes made based on the concept of the utility model that are merely formal but not substantial should be regarded as within the scope of the technical scheme of the utility model.

[0022] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are for the current Figure 1 It refers to the position state, and therefore cannot be understood as a special limitation of the technical solution provided by the utility model.

[0023] See also Figures 1 to 3, shows an electric linear adjustment device for a rear seat backrest of a vehicle, comprising: a base frame 1, the base frame 1 comprising a base frame main panel 11 and two base frame side panels 12 formed in a vertical state at both ends of the base frame main panel 11 in the length direction; a power mechanism 2, the power mechanism 2 is arranged at the outer position of one of the base frame side panels 12 of the aforementioned base frame 1, and the power mechanism 2 is fixedly connected to the aforementioned base frame side panel 12; a transmission screw assembly 3, the transmission screw assembly 3 comprises a screw body 31 and a sliding nut seat 32 threadedly connected to the screw body 31, the aforementioned screw body 31 is pivotally connected to the two aforementioned base frame side panels 12 in a state parallel to the length direction of the aforementioned base frame main panel 11, one end of the screw body 31 in the length direction passes out of the aforementioned base frame 1 body and penetrates into the aforementioned power mechanism 2, and the screw body 31 is transmission-connected to the power mechanism 2; an adjustment frame 4, the aforementioned adjustment frame 4 is sleeved on the aforementioned sliding nut seat 32 , and the aforementioned sliding nut seat 32 can drive the aforementioned adjusting frame 4 to reciprocate along the length direction of the aforementioned screw rod body 31; the guide rod assembly 5, the aforementioned guide rod assembly 5 includes a plurality of guide rod bodies 51, the aforementioned guide rod body 51 is installed between the two aforementioned base side panels 12 in a state parallel to the length direction of the aforementioned screw rod body 31, and the aforementioned guide rod body 51 passes through the aforementioned adjusting frame 4 and can guide and support the movement of the adjusting frame 4, and a guide rod spring pad 52 is also provided at the connection between the aforementioned guide rod body 51 and the aforementioned base side panel 12, the guide rod rod body 51 can provide guidance for the movement of the adjusting frame 4 and resist its lateral shaking and further ensure the movement stability of the screw rod body 31 and the sliding nut seat 52; the locking hook 6, the aforementioned locking hook 6 is fixedly connected to the aforementioned adjusting frame 4, and the locking hook 6 is used to connect with a lock buckle installed on the vehicle seat back, and the locking member 6 can be connected with different lock buckles, with a wide range of applications and good applicability.

[0024] Furthermore, the aforementioned adjustment frame 4 includes an adjustment frame main connecting plate 41 and a pair of adjustment frame side plates 42 maintained in a vertical state with the adjustment frame main connecting plate 41; wherein the aforementioned adjustment frame main connecting plate 41 is extended in a state parallel to the aforementioned base frame main panel 11, and the two aforementioned adjustment frame side plates 42 are arranged on both sides of the adjustment frame main connecting plate 41, and the aforementioned adjustment frame side plates 42 are maintained in a parallel state with the aforementioned base frame side panels 12; the aforementioned lock hook member 6 is in a U-shaped shape The structure is as follows: the two leg ends of the lock hook member 6 are respectively formed as a lock hook member connecting end 61, and the two lock hook member connecting end 61 are both mounted on the aforementioned adjusting frame main connecting plate 41, that is, the U-shaped opening end of the lock hook member 6 body is connected to the adjusting frame main connecting plate 41, thereby realizing the fixed installation of the lock hook member 6 and the adjusting frame 4, and one side leg of the U-shape of the lock hook member 6 body gradually approaches the other side leg from the middle, so that the width of the U-shaped opening end of the lock hook member 6 body is smaller than the width of the closed end.

[0025] The two ends of the sliding nut seat 32 in the length direction are respectively abutted against the inner side surfaces of the two adjusting frame side plates 42, so that the sliding nut seat 32 can drive the adjusting frame 4 to move; and a screw rod through hole 421 is also provided on the two adjusting frame side plates 42, which passes through the two screw rod through holes 421, and guide rod through holes 422 are also provided on the two adjusting frame side plates 42 and at positions corresponding to the plurality of guide rod bodies 51. The plurality of guide rod bodies 51 pass through their respective corresponding guide rod through holes 422, and guide rod through hole bushings 4221 are provided in the guide rod through holes 422, and the guide rod through hole bushings 4221 are assembled on the guide rod body 51.

[0026] In the present embodiment, a pair of sliding nut seat protection arms 321 are also formed on the aforementioned sliding nut seat 32, and the two sliding nut seat protection arms 321 are symmetrically arranged with the length direction of the aforementioned screw rod body 31 as the center line, and the two aforementioned sliding nut seat protection arms 321 are inclined to extend to a position close to the aforementioned adjustment frame body main connecting plate 41, and the aforementioned sliding nut seat protection arm is also arranged on the side surface of the adjustment frame body main connecting plate 41 facing the aforementioned adjustment frame body cavity 43 and at a position corresponding to the aforementioned sliding nut seat protection arm 321 away from the aforementioned sliding nut seat 32 body. Buffer pad 411, there is a distance between the end portion of the sliding nut seat protection arm 321 away from the sliding nut seat 32 body and the buffer pad 411 of the sliding nut seat protection arm. When the sliding nut seat 32 moves in a circumferential direction during movement, the end portion of the sliding nut seat protection arm 321 away from the sliding nut seat 32 body can abut against the buffer pad 411 of the sliding nut seat protection arm, thereby limiting the circumferential movement of the sliding nut seat 32, effectively preventing the sliding nut seat 32 and the screw body 31 from lateral shaking, and further ensuring the stability of operation.

[0027] In the present embodiment, a plurality of guide rod positioning holes 121 are further provided on the aforementioned pedestal side panel 12 close to the power mechanism 2 and at positions corresponding to the plurality of guide rod bodies 51. The plurality of aforementioned guide rod bodies 51 are cooperatively penetrated in the respective corresponding guide rod positioning holes 121, and a guide rod positioning hole bushing 1211 is further provided in the aforementioned guide rod positioning hole 121. The aforementioned guide rod positioning hole bushing 1211 is assembled on the aforementioned guide rod body 51; a plurality of guide rod limiting holes 122 are provided on the aforementioned pedestal side panel 12 far away from the power mechanism 2 and at positions corresponding to the plurality of guide rod bodies 51, and a plurality of guide rod limiting holes 122 are penetrated in the length direction of the aforementioned guide rod body 51. A guide rod body end portion 511 is formed at one end portion of the aforementioned guide rod limiting hole 122, and the aforementioned guide rod body end portion 511 is circular in shape and its radial diameter is larger than the diameter of the guide rod limiting hole 122, and the aforementioned guide rod spring washer 52 is assembled on the aforementioned guide rod body 51 at a position located between the aforementioned guide rod body end portion 511 and the aforementioned base frame side panel 12, and the aforementioned guide rod spring washer 52 can effectively achieve buffering between the guide rod body 51 and the base frame 1, and effectively absorb the vibration energy of the guide rod body 51 during operation, effectively reduce the vibration and impact force during operation and when the vehicle is driving, and further ensure the stability and safety of use.

[0028] Please continue to see Figure 1 and Figure 2 And focus on combining Figure 3The power mechanism 2 includes a driving motor 21 and a transmission gear box 22 connected to the power output end of the driving motor 21. The transmission gear assembly inside the transmission gear box 22 is connected to the power output shaft of the driving motor 21. The transmission gear box 22 provides input and can drive the screw body 31 to rotate; and the power mechanism 2 also includes a plurality of fixed columns 23, which are connected between the side panel 12 of the base frame and the driving motor 21 or between the side panel 12 of the base frame and the transmission gear box 22, and realize the fixed connection between the driving motor 21 and the base frame 1 body and the transmission gear box 22 and the base frame 1 body.

[0029] Furthermore, a screw gear shaft segment 311 is formed on one end portion of the aforementioned screw body 31 in the length direction, and the screw gear shaft segment 311 extends into the transmission gear box 22 of the aforementioned power mechanism 2, and the screw gear shaft segment 311 is connected to the transmission gear assembly inside the transmission gear box 22 to achieve transmission connection, so that the aforementioned power mechanism 2 can drive the aforementioned screw body 31 to rotate.

[0030] In the present embodiment, a screw rod clearance hole 123 penetrating the thickness direction is further provided on the aforementioned base frame side panel 12 close to the aforementioned power mechanism 2, the shape and size of the screw rod clearance hole 123 are adapted to the shape and size of the aforementioned screw rod body 31, and the aforementioned screw rod body 31 is inserted into the screw rod clearance hole 123 and realizes rotational cooperation with the base frame side panel 12, and a screw rod clearance hole bushing 1231 is also provided in the aforementioned screw rod clearance hole 123, and the aforementioned screw rod clearance hole bushing 1231 is sleeved on the aforementioned screw rod body 31; and a screw rod stop block 312 is convexly formed on the outer peripheral surface of the rod body of the aforementioned screw rod body 31 and at the position corresponding to the position close to the aforementioned power mechanism 2, the screw rod stop block 312 is fittedly arranged at the outer position of the base frame side panel 12 close to the power mechanism 2, and the screw rod stop block 312 is used to realize axial positioning of the screw rod body 31; and in the front A screw connecting section 313 is also formed at one end of the screw body 31 in the length direction away from the aforementioned power mechanism 2. The aforementioned screw connecting section 313 is cylindrical in shape and is coaxially arranged with the screw body 31. The radial diameter of the screw connecting section 313 is smaller than the radial diameter of the rod body of the aforementioned screw body 31. On the aforementioned base side panel 12 away from the aforementioned power mechanism 2, a base side panel connecting hole 124 is provided that runs through the thickness direction thereof. The shape and size of the base side panel connecting hole 124 are adapted to the shape and size of the aforementioned screw connecting section 313. The aforementioned screw connecting section 313 is penetrated into the base side panel connecting hole 124 and rotatably cooperates with the base side panel 12. In the aforementioned base side panel connecting hole 124, a base side panel connecting hole bushing 1241 is also provided. The aforementioned base side panel connecting hole bushing 1241 is sleeved on the aforementioned screw body 31.

[0031] Furthermore, a screw positioning seat 13 is also provided on the aforementioned base frame 1, and the screw positioning seat 13 is fixedly mounted on the aforementioned base side panel 12 away from the aforementioned power mechanism 2, and the screw positioning seat 13 is fixedly mounted on the inner side surface of the base side panel 12 facing the aforementioned power mechanism 2 through a plurality of screw positioning seat fasteners 131, and the aforementioned screw body 31 passes through the screw positioning seat 13 and is rotationally connected thereto, and the screw positioning seat 13 can effectively realize the positioning of the screw body 31, and effectively ensure the stability of the axial positioning of the screw body 31.

[0032] In the present embodiment, a screw rod limiting section 314 is further formed on the screw rod body 31, and the screw rod limiting section 314 is formed at a side position of the screw rod connecting section 313 away from the screw rod and protrudes outward from the base frame side panel 12 of the base frame 1, and the screw rod limiting section 314 is coaxially arranged with the screw rod connecting section 313, and a screw rod limiting section nut seat 3141 is also arranged on the screw rod limiting section 314, and a screw rod limiting section spring washer 3142 and a screw rod limiting section flat washer 3143 are also arranged between the screw rod limiting section nut seat 3141 and the base frame side panel 12, The screw rod limiting section elastic washer 3142 and the screw rod limiting section flat washer 3143 are both assembled on the aforementioned screw rod limiting section 314 and can slide along the direction of the screw rod limiting section 314. The aforementioned screw rod limiting section flat washer 3143 is fittedly arranged on the outer surface of the aforementioned base frame side panel 12 opposite to the aforementioned power mechanism 2, and the aforementioned screw rod limiting section elastic washer 3142 is arranged between the aforementioned screw rod limiting section flat washer 3143 and the screw rod limiting section nut seat 3141. The screw rod limiting section elastic washer 3142 can play a role of buffering and shock absorption to ensure the stability and safety of the operation of the transmission screw assembly 3.

[0033] Preferably, a base mounting frame 7 is also provided on the base main panel 11 of the base 1, and the base mounting frame 7 is used to fix the base 1 body on the vehicle seat.

[0034] See also Figures 1 to 3The working principle of the technical solution provided by the utility model is briefly described as follows: the lock hook 6 in the device can be connected and locked with different specifications of lock buckles on the rear seat of the vehicle, and the lock buckle is installed on the seat lock buckle welded to the vehicle body; when the angle of the rear seat back of the vehicle needs to be adjusted, the drive motor 21 is started and the transmission gear box 22 provides power input to drive the screw body 31 to rotate, and the screw body 31 cooperates with the sliding nut seat 32 to form a ball screw structure, thereby converting the rotational motion of the screw body 31 into the linear motion of the sliding nut seat 32 and driving the adjustment frame 4 to move, and the open end of the lock hook 6 is installed on the adjustment frame 4, and the lock hook 6 moves with the adjustment frame 4. At the same time, because the other end of the lock hook 6 cooperates with the lock buckle on the rear seat back, it finally drives the lock buckle and the rear seat back to adjust the angle, thereby realizing stepless adjustment of the rear seat back within a certain range, and the operation is smooth and reliable, which has significant promotion significance.

[0035] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

[0036] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. An electric linear adjustment device for a rear seat backrest of a vehicle, characterized in that: include: A base frame (1), the base frame (1) comprising a base frame main panel (11) and two base frame side panels (12) formed in a vertical state at both ends of the base frame main panel (11) in the length direction; a power mechanism (2), the power mechanism (2) is arranged at the outer side position of one of the base frame side panels (12) of the base frame (1), and the power mechanism (2) is fixedly connected to the base frame side panel (12); a transmission screw rod assembly (3), the transmission screw rod assembly (3) comprising a screw rod body (31) and a sliding nut seat (32) threadedly connected to the screw rod body (31), the screw rod body (31) is pivotally connected to the two base frame side panels (12) in a state parallel to the length direction of the base frame main panel (11), one end of the screw rod body (31) in the length direction passes out of the base frame (1) body and penetrates into the power mechanism (2), and the screw rod body (31) and the power mechanism (2) are actually connected. The present invention relates to a transmission connection; an adjusting frame (4), wherein the adjusting frame (4) is sleeved on the sliding nut seat (32), and the sliding nut seat (32) can drive the adjusting frame (4) to reciprocate along the length direction of the screw rod body (31); a guide rod assembly (5), wherein the guide rod assembly (5) comprises a plurality of guide rod bodies (51), wherein the guide rod bodies (51) are installed between two of the base frame side panels (12) in a state parallel to the length direction of the screw rod body (31), and the guide rod bodies (51) pass through the adjusting frame (4) and can guide and support the movement of the adjusting frame (4), and a guide rod spring pad (52) is also provided at the connection between the guide rod bodies (51) and the base frame side panels (12); a lock hook (6), wherein the lock hook (6) is fixedly connected to the adjusting frame (4), and the lock hook (6) is used to connect with a lock buckle installed on the vehicle seat backrest.

2. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 1, characterized in that: The adjusting frame (4) comprises an adjusting frame main connecting plate (41) and a pair of adjusting frame side plates (42) maintained in a vertical state with respect to the adjusting frame main connecting plate (41); wherein the adjusting frame main connecting plate (41) is extended in a state of being maintained in parallel with the main panel (11) of the base frame, and the two adjusting frame side plates (42) are arranged on both sides of the adjusting frame main connecting plate (41), and the adjusting frame side plates (42) are parallel to the side plates of the base frame. The panel (12) is kept in a parallel state; the lock hook member (6) is in a U-shaped structure, and the two leg ends of the lock hook member (6) are respectively formed as a lock hook member connecting end (61), and the two lock hook member connecting ends (61) are both mounted on the main connecting plate (41) of the adjusting frame body, so as to achieve the fixed installation of the lock hook member (6) and the adjusting frame body (4); and an adjusting frame body main connecting plate (41) and two adjusting frame body side plates (42) are also formed. The inner cavity (43) of the adjusting frame body, the sliding nut seat (32) is accommodated in the inner cavity (43) of the adjusting frame body, and the two end portions of the sliding nut seat (32) in the length direction are respectively abutted against the inner side surfaces of the two adjusting frame body side plates (42), so that the sliding nut seat (32) can drive the adjusting frame body (4) to move; and a screw rod through hole (421) penetrating through the thickness direction of the two adjusting frame body side plates (42) is also provided on each of the two adjusting frame body side plates (42), and the screw rod body (31) Guide rod through holes (422) are provided on the two adjustment frame side plates (42) at positions corresponding to the plurality of guide rod bodies (51), through the two screw rod through holes (421), and guide rod through hole bushings (4221) are provided in the guide rod through holes (422). The guide rod through hole bushings (4221) are assembled on the guide rod bodies (51).

3. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 2, characterized in that: A pair of sliding nut seat protection arms (321) are also formed on the sliding nut seat (32), and the two sliding nut seat protection arms (321) are symmetrically arranged with the length direction of the screw rod body (31) as the center line. The two sliding nut seat protection arms (321) extend obliquely to a position close to the main connecting plate (41) of the adjusting frame body, and on the surface of the main connecting plate (41) of the adjusting frame body facing the inner cavity (43) of the adjusting frame body and at an end portion corresponding to the sliding nut seat protection arm (321) away from the main body of the sliding nut seat (32). The sliding nut seat protection arm buffer pad (411) is also provided at the position, and there is a distance between the end of the sliding nut seat protection arm (321) away from the sliding nut seat (32) body and the sliding nut seat protection arm buffer pad (411). When the sliding nut seat (32) moves in a circumferential direction during movement, the end of the sliding nut seat protection arm (321) away from the sliding nut seat (32) body can abut against the sliding nut seat protection arm buffer pad (411), thereby realizing the limitation of the circumferential movement of the sliding nut seat (32).

4. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 2, characterized in that: A plurality of guide rod positioning holes (121) are provided on the side panel (12) of the base frame close to the power mechanism (2) and at positions corresponding to the plurality of guide rod bodies (51). The plurality of guide rod bodies (51) are cooperatively inserted into the corresponding guide rod positioning holes (121), and guide rod positioning hole bushings (1211) are provided in the guide rod positioning holes (121). The guide rod positioning hole bushings (1211) are assembled on the guide rod bodies (51); on the side panel (12) of the base frame far from the power mechanism (2) and at positions corresponding to the plurality of guide rod bodies (51), the plurality of guide rod bodies (51) are cooperatively inserted into the corresponding guide rod positioning holes (121). A plurality of guide rod limiting holes (122) are provided at the positions of the plurality of guide rod bodies (51), and a guide rod body end portion (511) is formed at one end portion of the guide rod body (51) passing through the guide rod limiting hole (122) in the length direction, the guide rod body end portion (511) is circular in shape and its radial diameter is greater than the diameter of the guide rod limiting hole (122), and the guide rod spring washer (52) is mounted on the guide rod body (51) at a position between the guide rod body end portion (511) and the base frame side panel (12).

5. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 1, characterized in that: The power mechanism (2) includes a driving motor (21) and a transmission gear box (22) connected to the power output end of the driving motor (21), and the transmission gear assembly inside the transmission gear box (22) is transmission-connected with the power output shaft of the driving motor (21). The power mechanism (2) also includes a plurality of fixing columns (23), which are connected between the side panel of the base frame (12) and the driving motor (21) or between the side panel of the base frame (12) and the transmission gear box (22), and realize the fixed connection between the driving motor (21) and the base frame (1) body and the transmission gear box (22) and the base frame (1) body.

6. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 5, characterized in that: A screw gear shaft section (311) is formed at one end of the screw body (31) in the length direction. The screw gear shaft section (311) extends into the transmission gear box (22) of the power mechanism (2), and the screw gear shaft section (311) is connected to the transmission gear assembly inside the transmission gear box (22) in a transmission manner, so that the power mechanism (2) can drive the screw body (31) to rotate.

7. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 6, characterized in that: A screw rod clearance hole (123) is also provided on a side panel (12) of the base frame close to the power mechanism (2) and runs through the thickness direction thereof. The shape and size of the screw rod clearance hole (123) are adapted to the shape and size of the screw rod body (31). The screw rod body (31) is inserted into the screw rod clearance hole (123) and is rotatably matched with the side panel (12) of the base frame. A screw rod clearance hole bushing (1231) is also provided in the screw rod clearance hole (123). The screw rod clearance hole bushing (1231) is sleeved on the screw rod body (31); and a screw rod stop block (312) is convexly formed on the outer peripheral surface of the rod body of the screw rod body (31) and at a position corresponding to the position close to the power mechanism (2). The screw rod stop block (312) is fitted at an outer position of the base frame side panel (12) close to the power mechanism (2), and the screw rod stop block (312) is used to achieve axial positioning of the screw rod body (31); and A screw connecting section (313) is formed at one end of the rod body (31) in the length direction away from the power mechanism (2). The screw connecting section (313) is cylindrical and coaxially arranged with the screw body (31). The radial diameter of the screw connecting section (313) is smaller than the radial diameter of the rod body of the screw body (31). A base frame side panel connecting hole (124) is provided on a base frame side panel (12) away from the power mechanism (2) and runs through the base frame side panel in the thickness direction. ), the shape and size of the base side panel connection hole (124) are compatible with the shape and size of the screw rod connection section (313), and the screw rod connection section (313) is inserted into the base side panel connection hole (124) and is rotatably matched with the base side panel (12), and a base side panel connection hole bushing (1241) is also provided in the base side panel connection hole (124), and the base side panel connection hole bushing (1241) is sleeved on the screw rod body (31).

8. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 7, characterized in that: A screw positioning seat (13) is also provided on the base frame (1), and the screw positioning seat (13) is fixedly mounted on a side panel (12) of the base frame away from the power mechanism (2), and the screw positioning seat (13) is fixedly mounted on the inner side surface of the side panel (12) of the base frame facing the power mechanism (2) through a plurality of screw positioning seat fasteners (131), and the screw body (31) passes through the screw positioning seat (13) and is rotationally connected thereto.

9. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 7, characterized in that: A screw rod limiting section (314) is also formed on the screw rod body (31), and the screw rod limiting section (314) is formed at a side position of the screw rod connecting section (313) away from the screw rod and protrudes outward from the base frame side panel (12) of the base frame (1). The screw rod limiting section (314) is coaxially arranged with the screw rod connecting section (313), and a screw rod limiting section nut seat (3141) is also arranged on the screw rod limiting section (314), and a screw rod limiting section spring washer is also arranged between the screw rod limiting section nut seat (3141) and the base frame side panel (12). (3142) and the screw rod limiting section flat washer (3143), the screw rod limiting section elastic washer (3142) and the screw rod limiting section flat washer (3143) are both assembled on the screw rod limiting section (314) and can slide along the direction of the screw rod limiting section (314), the screw rod limiting section flat washer (3143) is fitted on the outer surface of a side panel (12) of the base frame opposite to the power mechanism (2), and the screw rod limiting section elastic washer (3142) is arranged between the screw rod limiting section flat washer (3143) and the screw rod limiting section nut seat (3141).

10. The electric linear adjustment device for a rear seat backrest of a vehicle according to claim 1, characterized in that: A base frame mounting frame (7) is also provided on the base frame main panel (11) of the base frame (1), and the base frame mounting frame (7) is used to fix the base frame (1) body on the vehicle seat.

Images