An electric sliding rail system for car seats

Abstract

This utility model discloses an electric slide rail system for automobile seats, including a lower rail and an upper slide rail assembly. The upper slide rail assembly includes an upper rail body, a pair of seat mounting brackets, a sliding drive structure disposed at the bottom of the upper rail body, and two pairs of rolling wheels. The upper slide rail assembly is slidably connected to the lower rail via the sliding drive structure. The sliding drive structure includes a pair of worm gears spaced apart on the left and right, a drive motor, and a rack. The worm gears mesh with the racks on both sides, and the drive motor drives the worm gears to rotate, achieving reciprocating motion. The sliding drive structure also includes a drive mounting bracket, with symmetrical mounting notches on both sides for mounting the worm gears, allowing the outer side of the worm gear to extend from the mounting notch and mesh with the rack. The system is compact and occupies little space.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat adjustment technology, specifically to an electric slide rail system for automotive seats. Background Technology

[0002] Car seats are not only an important part of a vehicle, but their position also needs to be adjusted to improve driving and riding comfort. The traditional adjustment method involves manually pulling an unlock lever and pushing the seat forward or backward to change its fixed position on the floor rails, thus accommodating drivers and passengers of different sizes and adjusting it to the most suitable legroom and pedal distance.

[0003] With the advancement of automotive intelligence, traditional manual adjustment methods have been replaced by electric sliding rails to achieve functions such as seat memory, welcome, and courtesy. Most common electric sliding rails are driven by a lead screw and nut mechanism, converting motor rotation into linear motion. However, this driving method still has the following technical problems: the lead screw is mostly centrally located and needs to be installed throughout the adjustment range, occupying a significant amount of space and making it inconvenient to install other components. Utility Model Content

[0004] This utility model aims to solve the technical problems existing in the prior art, and innovatively proposes an electric sliding rail system for automobile seats, which has a compact structure and occupies little space.

[0005] To achieve the above objectives, this utility model provides an electric slide rail system for automobile seats, including a lower rail and an upper slide rail assembly. The upper slide rail assembly includes an upper rail body, a pair of seat mounting brackets, a sliding drive structure disposed at the bottom of the upper rail body, and two pairs of rolling wheels. The upper slide rail assembly is slidably connected to the lower rail via the sliding drive structure. The sliding drive structure includes a pair of worm gears spaced apart on the left and right, a drive motor for driving the worm gears, and racks disposed on the left and right sides of the lower rail groove. The worm gears mesh with the racks on both sides respectively, and the drive motor drives the worm gears to rotate, thereby realizing reciprocating motion. The sliding drive structure also includes a drive mounting bracket, on which mounting notches for mounting the worm are symmetrically arranged on the left and right sides, so that the outer side of the worm can extend out from the mounting notch and mesh with the rack.

[0006] In the above scheme: the top of the upper rail body is vertically arranged in the center along its extension direction, the top of the basin seat connecting bracket is located outside the lower rail groove, and the bottom of the seat mounting bracket is provided with a slot for locking onto the basin seat connecting bracket, and is fixed by rivets that pass through both the seat mounting bracket and the basin seat connecting bracket at the same time. The racks are fixed to the left and right inner walls of the lower rail, respectively, and the teeth of the two racks are arranged opposite each other. A cable carrier for cable routing is also provided inside the lower rail, and one end of the cable carrier is fixed to the upper rail body. The drive motor is installed at the front end of the drive mounting bracket, and a mounting hole is provided between the two mounting notches. The mounting hole is used to fix the drive mounting bracket to the bottom side of the upper rail body.

[0007] In the above scheme: a pair of mounting ears are vertically provided at both the front and rear ends of the bottom side of the upper slide rail assembly. The mounting ears are used to install rolling wheels. The gap elimination structure is also provided at both the front and rear ends of the bottom side of the upper rail body.

[0008] In the above scheme: the gap elimination structure includes a rotating bracket, the middle part of which is rotatably connected to the mounting lug via a rotating shaft extending to the left and right. The left and right sides of the front end of the rotating bracket are provided with gap elimination wheels, and the top of the rear end is provided with a rubber pad. The rubber pad is used to abut against the upper rail body, and the bottom of the gap elimination wheel is suspended. The upper rail body is provided with clearance through holes corresponding to the two gap elimination wheels, and the top of the gap elimination wheel extends out from the clearance through hole.

[0009] In the above scheme: a pair of anti-detachment baffles extending into the slot are provided on both sides of the lower rail. The anti-detachment baffles extend obliquely upward into the slot and then bend horizontally to the upper part of the middle of the gap-eliminating wheel. The gap-eliminating wheel abuts against the inclined part of the anti-detachment baffle.

[0010] In the above scheme: the rack is a helical rack, the two worms share a drive motor, and the worms are connected by a linkage mechanism.

[0011] In the above scheme: the linkage mechanism includes a driving gear connected to the output end of the drive motor and driven gears meshing on the left and right sides of the driving gear respectively, and the worm is coaxially connected to the corresponding driven gear respectively; The top of the drive mounting bracket has a first groove for mounting the linkage mechanism, and the drive mounting bracket has shaft holes corresponding to each worm, driven gear, driving gear and drive motor.

[0012] In the above scheme: the mounting ears on both the front and rear sides of the upper rail body extend to the middle of the upper rail body, and the distance between the mounting ears on the front and rear sides is equal to the length of the drive mounting bracket, forming a positioning notch for locking the drive mounting bracket. The drive mounting bracket can be pre-positioned through the mounting notch and then installed on the bottom side of the upper rail body using bolts.

[0013] In the above scheme: the lower rail is also provided with a rubber strip shielding structure, the rubber strip shielding structure includes a rubber strip for being stuck in the groove of the lower rail, both ends of the rubber strip are fixed on the lower rail, the middle of the rubber strip is movably disposed, the bottom side of the rubber strip is provided with a relief groove corresponding to two anti-detachment edges, and the rubber strip is supported by the anti-detachment edges, and the upper rail body is also provided with a rubber strip guiding mechanism.

[0014] In the above scheme: each of the seat mounting brackets has guide holes extending forward and backward for the rubber strip to pass through. The rubber strip guiding mechanism includes guide roller protective covers respectively disposed at the ends of the two seat mounting brackets that are far apart from each other. The guide roller protective covers are hinged to the seat mounting brackets. An upper guide roller is disposed on the side of the guide roller protective cover closest to the seat mounting bracket, and a lower guide roller is disposed on the side away from the seat mounting bracket. When the rubber strip is laid, it wraps around from above the upper guide roller to below the lower guide roller and then extends out of the guide roller protective cover. The distance between the lower guide roller and the anti-detachment edge is exactly the thickness of the rubber strip.

[0015] In summary, the beneficial effects of this utility model are as follows: The worm gear rack structure, with racks respectively located on both sides of the upper rail body and the lower rail having a central opening for installing other structures, occupies little space, resulting in a compact structure. The rack, worm, and drive motor are all located at the same horizontal height and can be installed on the bottom side of the lower rail, requiring a lower installation height. The required precision for worm gear rack meshing is also lower, resulting in low manufacturing costs. The drive mounting bracket can fix the drive motor and worm, satisfying the installation requirements of the sliding drive structure. Furthermore, the added rubber strip and rubber strip guide mechanism can drive the rubber strip to move with the upper slide rail assembly to open or close, improving the dustproof performance of the electric slide rail system and enhancing its aesthetic appeal. Furthermore, the added gap-eliminating structure, with a rubber pad abutting against one end of the rotating bracket, can elastically adjust when the gap-eliminating wheel abuts against the top of the lower rail, eliminating vertical gaps. The inclined surface can adjust the gap-eliminating wheel to a centered position, eliminating horizontal gaps. Only one gap-eliminating wheel is needed to eliminate gaps in both directions, demonstrating ingenious design and stable reliability. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present invention.

[0017] Figure 2 This is an exploded view of this utility model.

[0018] Figure 3 This is a 3D view of the upper slide rail assembly.

[0019] Figure 4 It is a cross-sectional view of the gap-eliminating structure and the upper rail body.

[0020] Figure 5 This is a 3D diagram of a sliding drive structure.

[0021] Figure 6 This is a front view of the upper slide rail assembly and the lower rail.

[0022] Figure 7 This is a cross-sectional view of the rubber strip guide mechanism.

[0023] Figure 8 This is a schematic diagram of the lower rail and the cable chain.

[0024] Figure 9 This is a cross-sectional view of the lower rail and the cable chain. Detailed Implementation

[0025] The present invention will be further described below with reference to embodiments and accompanying drawings: like Figures 1-9 As shown, an electric sliding rail system for a car seat includes a lower rail 2 and an upper rail assembly 1. The upper rail assembly 1 includes an upper rail body 101, a sliding drive structure 103 disposed at the bottom of the upper rail body 101, and a pair of seat mounting brackets 102 spaced apart at the top of the upper rail body 101. A basin seat connecting bracket 1011 is vertically disposed centrally at the top of the upper rail body 101 along its extension direction, and the top of the basin seat connecting bracket 1011 is located outside the groove of the lower rail 2. In this embodiment, the upper rail body 101 is formed by aluminum extrusion. The bottom of the seat mounting bracket 102 is provided with a slot for engaging with the basin seat connecting bracket 1011, and is fixed by rivets passing through both the seat mounting bracket 102 and the basin seat connecting bracket 1011. In this embodiment, a pair of connecting lugs 1022 are provided at intervals on the left and right sides of the bottom of the seat mounting bracket 102. The slot is formed by the gap between the connecting lugs 1022, and the rivet also passes through the connecting lugs 1022 and the basin seat connecting bracket 1011.

[0026] A pair of rolling wheels 104 are provided at both the front and rear ends of the bottom side of the upper rail body 101, and a pair of mounting lugs 1012 are provided vertically at both the front and rear ends of the bottom side of the upper slide rail assembly 1. The rotating shafts of the rolling wheels 104 are all mounted on the mounting lugs 1012. In this embodiment, the rolling wheels 104 are fixed to the bottom side of the upper rail body 101 by an interference fit.

[0027] To improve the installation stability of the lower rail 2 and the upper slide rail assembly 1, gap-eliminating structures are also provided at the front and rear ends of the bottom side of the upper rail body 101. The gap-eliminating structure includes a rotating bracket 1051, the middle of which is rotatably connected to the mounting lug 1012 via a left-right extending rotating shaft. Gap-eliminating wheels 105 are provided on both the left and right sides of the front end of the rotating bracket 1051, and a rubber pad 1052 is provided on the top of the rear end. The rubber pad 1052 abuts against the upper rail body 101, and the bottom of the gap-eliminating wheels 105 is suspended. The upper rail body 101 is provided with clearance through holes 1013 corresponding to the two gap-eliminating wheels 105, the tops of the gap-eliminating wheels 105 protruding from the clearance through holes 1013, and the tops of the two gap-eliminating wheels 105 respectively abut against both sides of the groove of the lower rail 2. The upper rail body 101 rolls in the lower rail 2 through the rolling wheel 104 and the gap-eliminating wheel 105, which can effectively absorb installation errors. At the same time, the running resistance fluctuation of the upper rail body 101 is also very small, and the system operates smoothly with low noise.

[0028] To prevent the gap-reducing wheel 105 from dislodging, a pair of anti-dislodging edges 202 extending into the groove are provided on both sides of the groove inside the lower rail 2. The anti-dislodging edges 202 extend obliquely upward into the groove and then bend horizontally to the upper part of the middle of the gap-reducing wheel 105. The gap-reducing wheel 105 abuts against the inclined part of the anti-dislodging edge 202. The pair of anti-dislodging edges 202 are symmetrically arranged to ensure that the gap-reducing wheel 105 can be centered, making the upper slide rail assembly 1 more stable when moving back and forth.

[0029] The upper slide rail assembly 1 is slidably connected to the lower rail 2 via a sliding drive structure 103. The sliding drive structure 103 includes a pair of worm gears 1034 spaced apart on the left and right, a drive motor 1031 for driving the worm gears 1034, and racks 201 respectively disposed on the left and right sides of the groove in the lower rail 2. The racks 201 are fixed to the left and right inner sidewalls of the lower rail 2, respectively, and the teeth of the two racks 201 are arranged opposite each other. The worm gears 1034 mesh with the racks 201 on both sides, and the drive motor 1031 drives the worm gears 1034 to rotate, realizing reciprocating motion. A pair of cable carriers 5 are also provided in the lower rail 2, with one end of the cable carriers 5 fixed to the upper rail body 101. The racks 201 and worm gears 1034 provide space in the lower rail 2 for cable routing, and the cable carriers 5 can meet the requirements of more wire harnesses.

[0030] The rack 201 is a helical rack, which enables stepless locking. Compared to a spur rack with a long slide rail, it reduces the need for additional locking mechanisms and eliminates the risk of false locking, as the motor needs to move back and forth a certain distance after stopping to achieve complete locking. Two worm gears 1034 share a single drive motor 1031, and a linkage mechanism connects the worm gears 1034. The drive motor 1031 is a reversible brushed motor. The linkage mechanism includes a driving gear 1033 connected to the output of the drive motor 1031 and driven gears 1032 meshing on the left and right sides of the driving gear 1033, respectively. Each worm gear 1034 is coaxially connected to its corresponding driven gear 1032. The diameter of the driving gear 1033 is larger than that of the driven gear 1032.

[0031] The sliding drive structure 103 also includes a drive mounting bracket 1035. The drive mounting bracket 1035 has symmetrical mounting notches on its left and right sides for mounting worm gears 1034, allowing the outer side of the worm gear 1034 to extend from the mounting notches and mesh with the rack 201. A first groove for mounting a linkage mechanism is provided at the front of the top of the drive mounting bracket 1035. The drive motor 1031 is mounted on the front end of the drive mounting bracket 1035, and shaft holes are provided on the drive mounting bracket 1035 corresponding to each worm gear 1034, driven gear 1032, driving gear 1033, and drive motor 1031. A mounting hole is provided between the two mounting notches to fix the drive mounting bracket 1035 to the bottom side of the upper rail body 101. To improve installation efficiency, the mounting ears 1012 on both the front and rear sides of the upper rail body 101 extend to the middle of the upper rail body 101, and the distance between the mounting ears 1012 on the front and rear sides is equal to the length of the drive mounting bracket 1035, forming a positioning notch for locking the drive mounting bracket 1035. The drive mounting bracket 1035 can be pre-positioned through the mounting notch and then installed on the bottom side of the upper rail body 101 by bolts.

[0032] The lower rail 2 is also equipped with a rubber strip shielding structure, which includes a rubber strip 3 for locking onto the groove of the lower rail 2. Both ends of the rubber strip 3 are fixed to the lower rail 2, and the middle part of the rubber strip 3 is locked into the groove of the lower rail 2, making the middle part movable. The bottom side of the rubber strip 3 is provided with relief grooves corresponding to the two anti-detachment edges 202, and the rubber strip 3 is supported by the anti-detachment edges 202.

[0033] Each seat mounting bracket 102 has guide holes extending forward and backward for the rubber strip 3 to pass through. The upper rail body 101 also has a rubber strip guiding mechanism 4. The rubber strip guiding mechanism 4 includes roller guards 401 located at opposite ends of the two seat mounting brackets 102, with the bottom side of the roller guards 401 abutting the top of the lower rail 2. The roller guards 401 are hinged to the seat mounting brackets 102. An upper guide roller 402 is located on the side of the roller guard 401 closest to the seat mounting bracket 102, and a lower guide roller 403 is located on the side away from the seat mounting bracket 102. The top of the upper guide roller 402 is flush with the guide holes, and the upper guide roller 402 is positioned above the lower guide roller 403. When the rubber strip 3 is laid, it wraps around from above the upper guide roller 402 to below the lower guide roller 403, and then extends out of the roller guard 401. The distance between the lower guide roller 403 and the anti-slip edge 202 is exactly the thickness of the rubber strip 3, allowing the rubber strip 3 to pass through.

[0034] In use, the drive motor 1031 is started, which drives the worm gears 1034 on both sides to rotate simultaneously through the linkage mechanism. The worm gears 1034 mesh with the rack 201, converting rotation into linear motion, thereby moving the upper slide rail assembly 1 back and forth. During this movement, the rubber strip 3 undergoes a wave-like deformation as the upper slide rail assembly 1 moves back and forth, thus meeting the dustproof requirements during its movement. Furthermore, when the slide rail reaches its end or encounters unexpected resistance, the rubber strip 3 provides cushioning, protecting the upper slide rail assembly 1 and the machine body structure from hard impacts.

Claims

1. An electric slide rail system for an automobile seat, comprising a lower rail (2) and an upper slide rail assembly (1), the upper slide rail assembly (1) comprising an upper rail body (101), a pair of seat mounting brackets (102), a sliding drive structure (103) disposed at the bottom of the upper rail body (101), and two pairs of rollers (104), the upper slide rail assembly (1) being slidably connected to the lower rail (2) via the sliding drive structure (103), characterized in that: The sliding drive structure (103) includes a pair of worm gears (1034) spaced apart on the left and right, a drive motor (1031) for driving the worm gears (1034), and racks (201) respectively disposed on the left and right sides of the groove of the lower rail (2). The worm gears (1034) mesh with the racks (201) on both sides respectively. The drive motor (1031) drives the worm gears (1034) to rotate, thereby realizing reciprocating motion. The sliding drive structure (103) also includes a drive mounting bracket (1035), on which mounting notches for mounting the worm (1034) are symmetrically arranged on the left and right sides, so that the outer side of the worm (1034) can extend out from the mounting notch and mesh with the rack (201).

2. The electric slide rail system for automobile seats according to claim 1, characterized in that: The top of the upper rail body (101) is vertically arranged in the center along its extension direction with a basin seat connecting bracket (1011). The top of the basin seat connecting bracket (1011) is located outside the groove of the lower rail (2). The bottom of the seat mounting bracket (102) is provided with a slot for locking onto the basin seat connecting bracket (1011) and is fixed by rivets that pass through both the seat mounting bracket (102) and the basin seat connecting bracket (1011). The racks (201) are respectively fixed on the left inner sidewall and the right inner sidewall of the lower rail (2), and the teeth of the two racks (201) are arranged opposite to each other. The lower rail (2) is also provided with a cable carrier (5) for cable routing. One end of the cable carrier (5) is fixed on the upper rail body (101). The drive motor (1031) is installed at the front end of the drive mounting bracket (1035). A mounting hole is provided between the two mounting notches. The mounting hole is used to fix the drive mounting bracket (1035) to the bottom side of the upper rail body (101).

3. The electric slide rail system for automobile seats according to claim 1, characterized in that: The upper slide rail assembly (1) has a pair of mounting ears (1012) vertically arranged at both the front and rear ends of its bottom side. The mounting ears (1012) are used to install the rolling wheel (104). The upper rail body (101) also has gap-eliminating structures at both the front and rear ends of its bottom side.

4. The electric slide rail system for automobile seats according to claim 3, characterized in that: The gap-eliminating structure includes a rotating bracket (1051), the middle part of which is rotatably connected to the mounting lug (1012) via a rotating shaft extending to the left and right. The left and right sides of the front end of the rotating bracket (1051) are provided with gap-eliminating wheels (105), and the top of the rear end is provided with a rubber pad (1052). The rubber pad (1052) is used to abut against the upper rail body (101), and the bottom of the gap-eliminating wheel (105) is suspended. The upper rail body (101) is provided with clearance through holes (1013) corresponding to the two gap-eliminating wheels (105), and the top of the gap-eliminating wheel (105) extends out from the clearance through hole (1013).

5. An electric slide rail system for an automobile seat according to claim 4, characterized in that: The lower rail (2) is provided with a pair of anti-detachment baffles (202) extending into the slot on both sides. The anti-detachment baffles (202) extend obliquely upward into the slot and then bend horizontally to the upper part of the middle of the gap-reducing wheel (105). The gap-reducing wheel (105) abuts against the inclined part of the anti-detachment baffles (202).

6. The electric slide rail system for automobile seats according to claim 1, characterized in that: The rack (201) is a helical rack, the two worms (1034) share a drive motor (1031), and the worms (1034) are connected by a linkage mechanism.

7. An electric slide rail system for an automobile seat according to claim 6, characterized in that: The linkage mechanism includes a drive gear (1033) connected to the output end of the drive motor (1031) and driven gears (1032) meshing on the left and right sides of the drive gear (1033) respectively, and the worm (1034) is coaxially connected to the corresponding driven gear (1032). The top of the drive mounting bracket (1035) is provided with a first groove for mounting the linkage mechanism, and the drive mounting bracket (1035) is provided with shaft holes corresponding to each worm (1034), driven gear (1032), driving gear (1033) and drive motor (1031).

8. An electric slide rail system for an automobile seat according to claim 3, characterized in that: The mounting ears (1012) on both the front and rear sides of the upper rail body (101) extend to the middle of the upper rail body (101), and the distance between the mounting ears (1012) on the front and rear sides is equal to the length of the drive mounting bracket (1035), forming a positioning notch for locking the drive mounting bracket (1035).

9. An electric slide rail system for an automobile seat according to claim 1, characterized in that: The lower rail (2) is also provided with a rubber strip shielding structure. The rubber strip shielding structure includes a rubber strip (3) for locking in the groove of the lower rail (2). Both ends of the rubber strip (3) are fixed on the lower rail (2). The bottom side of the rubber strip (3) is provided with a relief groove corresponding to two anti-detachment edges (202), and the rubber strip (3) is supported by the anti-detachment edges (202). The upper rail body (101) is also provided with a rubber strip guide mechanism (4).

10. An electric slide rail system for an automobile seat according to claim 9, characterized in that: Each seat mounting bracket (102) has guide holes extending forward and backward for the rubber strip (3) to pass through. The rubber strip guiding mechanism (4) includes a guide roller guard (401) respectively located at the ends of the two seat mounting brackets (102) that are far apart from each other. The guide roller guard (401) is hinged to the seat mounting bracket (102). An upper guide roller (402) is provided on the side of the guide roller guard (401) closest to the seat mounting bracket (102), and a lower guide roller (403) is provided on the side away from the seat mounting bracket (102). When the rubber strip (3) is laid, it goes from above the upper guide roller (402) to below the lower guide roller (403) and then extends out of the guide roller guard (401). The distance between the lower guide roller (403) and the anti-detachment edge (202) is exactly the thickness of the rubber strip (3).

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