Automobile seat electric slide rail

Abstract

The utility model discloses an automobile seat electric slide rail, including structure symmetry's left, right slide rail assembly, each assembly contains slide rail, slide connection's upper slide rail and the transmission mechanism between both, is equipped with drive mechanism between two assemblies, and transmission mechanism contains reduction gear box, screw rod and nut cover with screw rod thread sleeve joint, and nut cover is fixed in the upper slide rail, and screw rod rotatory mounting is in the lower slide rail, and reduction gear box power link is in the screw rod end, and drive mechanism includes the mounting support of horizontal placement between two groups lower slide rail end and the double -output motor of fixed in the support middle section, and motor both ends each link a transmission shaft, and transmission shaft other end stretches into lower slide rail and reduction gear box power link, realizes seat fore-and-aft adjustment. The utility model has the advantages of: reduce the noise in the car, save the space below seat.

Description

Technical Field

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

[0002] Car seat rails are the core component for adjusting the seat forward and backward. They change the seat position through the relative movement of a mechanical structure to meet the seating needs of different occupants, while ensuring the stability and safety of the seat during driving. Traditional electric seat rails typically consist of an upper rail, a lower rail, a drive motor, and a transmission mechanism. The seat is fixedly connected to the upper rail. The basic principle is that the rotational power output by the motor is amplified by a reduction mechanism and then transmitted through the transmission components to achieve linear movement of the upper rail relative to the lower rail, thereby driving the seat to adjust forward and backward.

[0003] In some traditional designs, the drive motor is directly fixed to the bottom of the seat, forming an integral structure. When the motor starts, power is transmitted to the upper slide rail via the drive shaft. At this time, the gearbox inside the upper slide rail engages with the screw fixed in the lower slide rail. As the motor continuously outputs power, it causes the upper slide rail to move back and forth relative to the lower slide rail fixed to the vehicle body, ultimately adjusting the seat position. In traditional designs, the motor is located at the bottom of the seat, resulting in significant noise from the motor and drive shaft, affecting passenger comfort. Furthermore, it occupies the limited space under the seat, restricting the layout of other functional components. Utility Model Content

[0004] In view of this, the present invention provides an electric sliding rail for car seats, wherein the motor and drive shaft are fixed to the floor of the vehicle body, thereby reducing interior noise and saving space under the seat.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An electric sliding rail for a car seat includes a left sliding rail assembly and a right sliding rail assembly. Each of the left and right sliding rail assemblies includes a lower sliding rail, an upper sliding rail slidably connected within the lower sliding rail, and a transmission mechanism installed between the upper and lower sliding rails. A drive mechanism is provided between the left and right sliding rail assemblies. The transmission mechanism includes a reduction gearbox, a screw, and a nut sleeve threadedly connected to the screw. The nut sleeve is fixedly connected within the upper sliding rail, the screw is rotatably installed within the lower sliding rail, and the reduction gearbox is poweredly connected to the end of the screw.

[0007] The drive mechanism includes a mounting bracket horizontally positioned between the ends of the two sets of lower slide rails, and a motor fixedly installed in the middle section of the mounting bracket. The motor is a dual-output motor, with a drive shaft connected to each end. The end of the drive shaft away from the motor extends into the lower slide rail and is powered by the reduction gearbox.

[0008] With the above structure, the dual-output motor of the drive mechanism is horizontally positioned between the ends of the two sets of lower slide rails via a mounting bracket. The motor power is directly transmitted to the reduction gearboxes on both sides via the drive shaft, and then the drive screw and nut sleeve cooperate to realize the sliding of the upper slide rail. This prevents the motor and drive shaft from moving with the seat and allows them to be placed inside the car carpet. This avoids the transmission of noise from the movement of the power components and effectively isolates the noise source using the carpet, significantly reducing the perceived noise in the car and improving sound quality. At the same time, since the upper slide rail does not occupy space due to the absence of motors, drive shafts, brackets, and other parts, it provides ample space for the arrangement of seat auxiliary functions, greatly reduces the block value of the seat frame, and optimizes the integration of seat functions and space utilization efficiency.

[0009] Preferably, the lower slide rail has symmetrically arranged assembly cavities extending along its length on both sides, and the upper slide rail has symmetrically arranged connecting parts on both sides. Two connecting parts are located within two corresponding assembly cavities. A slider is provided between the connecting part and the assembly cavity, and the slider is fixedly connected to the connecting part. The bottom and outer side of the slider are slidably engaged with the assembly cavity. With this structure, the upper slide rail experiences more uniform force and exhibits better sliding smoothness.

[0010] Preferably, the assembly cavity is open at the lower end inside the lower slide rail. The connecting part includes a transition section extending outward from the lower end of the upper slide rail and a connecting plate extending upward from the outer end of the transition section. The connecting plate extends upward into the assembly cavity from the lower opening. The inner side of the slider has a mounting groove that engages with the connecting plate. The outer side and bottom of the slider are provided with protruding ribs that slide against the assembly cavity. With this structure, the slider is secured to the connecting plate via the mounting groove, and the protruding ribs on the outer side and bottom engage with the assembly cavity. This ensures a stable connection between the slider and the upper slide rail, while the protruding ribs reduce the contact area between the slider and the assembly cavity, thus reducing sliding friction resistance and noise.

[0011] Preferably, the connecting plate has inwardly inclined guide slopes at both ends of its top along its length, and the inner end of the guide slopes is connected to a groove. The inner side of the mounting groove of the slider has a protrusion that mates with the groove, and the guide slopes fit against the groove wall of the mounting groove.

[0012] And / or, the lower part of the slider is provided with an inwardly extending protrusion, and the transition section is supported on the protrusion. This structure facilitates quick positioning of the slider during installation; the fit between the groove and the slider protrusion enhances the connection strength between the slider and the upper slide rail, preventing the slider from loosening or falling off during sliding; the protrusion at the lower part of the slider provides support for the transition section, improving the stability and reliability of the sliding structure.

[0013] Preferably, the slider has mounting notches at both ends of its top, and spring sheets are installed in each mounting notch;

[0014] The mounting notch has inwardly extending elastic support seats on both sides. Slots are located above the elastic support seats. Both ends of the spring plate are supported on the elastic support seats and inserted into the slots on either side. The middle of the spring plate has an upwardly convex arch shape, with the top of the arch supporting the top of the assembly cavity. Using this structure, the arched support of the spring plate compensates for the gaps in the slide rails, suppressing vibration and noise during sliding. The elastic support seats and slots define the position of the spring plate, preventing displacement and failure, continuously ensuring a tight fit between the slide rails, and optimizing the quietness and structural stability during seat adjustment.

[0015] Preferably, the lower slide rail has support brackets fixed at both ends, each support bracket having mounting holes. Self-lubricating bushings are press-fitted into these mounting holes, and the screw's two ends are rotated and supported via these self-lubricating bushings. With this structure, the self-lubricating bushings reduce screw rotation resistance and wear, improve screw transmission efficiency, and reduce noise caused by friction.

[0016] Preferably, the reduction gearbox is fixedly mounted inside the lower slide rail by a fixed bracket, and a rubber pad is fitted around the outer periphery of the reduction gearbox. This structure ensures a secure installation of the reduction gearbox and buffers the vibration and noise generated during its operation.

[0017] Preferably, a bearing seat is fixedly installed inside the upper slide rail. The bearing seat has downwardly extending side support sections at both ends. The side support sections are provided with screw through holes. The nut sleeve is secured between the two sets of side support sections by a rubber pad. The screw passes through the two screw through holes and the nut sleeve.

[0018] And / or, the nut sleeve has an external rectangular block structure, with positioning grooves on the upper side and front and rear sides of the rectangular block structure. The rubber pad is encased within the positioning grooves on the upper side and front and rear sides of the rectangular block structure. With this structure, an elastic connection is formed between the nut sleeve and the side support section, which can buffer vibrations during threaded transmission and reduce noise. The cooperation between the positioning grooves and the rubber pad ensures the installation accuracy of the nut sleeve and also absorbs some of the transmission stress through the rubber pad, preventing the nut sleeve from loosening due to long-term stress.

[0019] Preferably, the mounting bracket has outwardly extending lugs on both ends, which are fixed to the side of the lower slide rail by bolts. This structure disperses installation stress and improves the connection strength between the mounting bracket and the lower slide rail.

[0020] Preferably, the bottom of the mounting groove on the inner side of the slider in the width direction is provided with a protruding rib that abuts against the connecting plate, and the outer side is provided with a protruding rib that abuts against the assembly cavity. This structure eliminates horizontal installation gaps, the inner rib enhances the tightness of the connection between the slider and the connecting plate, and the outer rib further optimizes the sliding fit between the slider and the assembly cavity.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. By fixing the mounting bracket of the drive mechanism to the lower rail, the traditional layout of fixing the motor to the bottom of the seat is changed, which effectively avoids the direct transmission of motor and drive shaft noise to the seat, significantly reduces the perceived noise in the car and improves the sound quality of the ride; at the same time, it frees up the space under the seat and optimizes the space utilization efficiency and functional integration of the overall structure.

[0023] 2. The slider is installed without gaps, and the elastic support structure of the spring sheet can effectively eliminate the dynamic gap generated during the sliding process between the upper and lower slide rails, suppress the impact noise and vibration caused by the gaps, and improve the smoothness of the slide rail sliding and the structural stability.

[0024] 3. The slider contacts the assembly cavity and the connecting plate through several raised ribs. This design greatly reduces the friction area during sliding, effectively reduces sliding resistance, and makes the movement of the upper slide rail relative to the lower slide rail smoother and less strenuous. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 A cross-sectional view showing the sliding fit between the upper slide rail 1 and the lower slide rail 2;

[0027] Figure 3 This is the inside view of slider 5;

[0028] Figure 4 This is the outer view of slider 5;

[0029] Figure 5 To show the cross-sectional view of the guide ramp 1b fitting;

[0030] Figure 6 A sectional view showing the mounting method of screw 42;

[0031] Figure 7 To show the cross-sectional view of transmission assembly 4;

[0032] Figure 8 An exploded view showing the installation structure of nut sleeve 43. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0034] like Figure 1As shown, an electric sliding rail for a car seat includes a left sliding rail assembly A and a right sliding rail assembly B. The left and right sliding rail assemblies A and B have identical structures and are symmetrically arranged. Both assemblies A and B include a lower sliding rail 2, an upper sliding rail 1 slidably connected within the lower sliding rail 2, and a transmission mechanism 4 installed between the upper and lower sliding rails 1 and 2. A drive mechanism 3 is provided between the left and right sliding rail assemblies A and B. The top of the upper sliding rail 1 has a support plate 1d extending along its length. Connecting nuts 1e are provided at both ends of the top of the support plate 1d, and the upper sliding rail 1 is fixedly connected to the car seat via the connecting nuts 1e.

[0035] like Figure 1 As shown, the drive mechanism 3 includes a mounting bracket 33 horizontally positioned between the ends of the two sets of lower slide rails 2, and a motor 31 fixedly mounted in the middle section of the mounting bracket 33. The motor 31 is a dual-output motor, with a drive shaft 32 connected to each end. Both sides of the mounting bracket 33 have outwardly extending lugs 33a, which are fixed to the sides of the lower slide rails 2 by bolts. This mounting method can distribute the installation stress and improve the connection strength between the mounting bracket 33 and the lower slide rails 2.

[0036] like Figure 6 and Figure 7 As shown, the transmission mechanism 4 includes a reduction gearbox 41, a screw 42, and a nut sleeve 43 threadedly connected to the screw 42. The end of the transmission shaft 32 furthest from the motor 31 extends into the lower slide rail 2 and is poweredly connected to the reduction gearbox 41. The reduction gearbox 41 is fixedly mounted inside the lower slide rail 2 by a fixing bracket 9, and a rubber pad 10 is fitted around its outer circumference to securely mount the reduction gearbox 41 and buffer the vibration and noise generated during its operation. The output end of the reduction gearbox 41 is connected to the screw 42 to drive the screw 42 to rotate. Figure 8 As shown, a bearing seat 11 is fixedly installed inside the upper slide rail 1. The bearing seat 11 has downwardly extending side support sections 11a at both ends. The side support sections 11a are provided with screw through holes 11b. The nut sleeve 43 is secured between the two sets of side support sections 11a by the rubber pad 10. The screw 42 passes through the two screw through holes 11b and the nut sleeve 43.

[0037] like Figure 7 and Figure 8As shown, the nut sleeve 43 has a rectangular block structure on the outside. Positioning grooves 43a are provided on the upper side and both front and rear sides of the rectangular block structure. Rubber pads 10 cover the positioning grooves 43a on the upper side and both front and rear sides of the rectangular block structure. The cooperation between the positioning grooves 43a and the rubber pads 10 ensures the installation accuracy of the nut sleeve 43 and also absorbs some of the transmission stress through the rubber pads 10, preventing the nut sleeve 43 from loosening due to long-term stress. When the motor 31 is working, power is transmitted to the reduction gearbox 41 through the transmission shaft 32. The reduction gearbox 41 drives the screw 42 to rotate. Since the nut sleeve 43 is threadedly connected to the screw 42 and the nut sleeve 43 is fixedly connected inside the upper slide rail 1, the rotation of the screw 42 forces the upper slide rail 1 to slide relative to the lower slide rail 2, thereby realizing the fore-and-aft adjustment of the car seat.

[0038] like Figure 2 As shown, the top of the lower slide rail 2 is bent inward at both ends in the width direction to form two assembly parts 21, making the middle of the top of the lower slide rail 2 open. There are gaps between the two assembly parts 21 and the left and right sides of the lower slide rail 2. Assembly cavities 2c are formed between the assembly parts 21 and the left and right sides of the lower slide rail 2. The two assembly cavities 2c are symmetrically arranged and extend along the length direction of the lower slide rail 2. The assembly cavities 2c are open at the lower end inside the lower slide rail 2. Connecting parts 1a are symmetrically arranged on both sides of the upper slide rail 1. The connecting parts 1a include a transition section 1a1 extending outward from the lower end of the upper slide rail 1 and a connecting plate 1a2 extending upward from the outer end of the transition section 1a1. The connecting plate 1a2 extends upward into the assembly cavity 2c from the lower end of the opening. The two connecting parts 1a are located in the two assembly cavities 2c one to one. A slider 5 is arranged between the connecting parts 1a and the assembly cavities 2c. The slider 5 is fixedly connected to the connecting parts 1a. The bottom and outer side of the slider 5 slide in cooperation with the assembly cavity 2c. The slider 5 is made of plastic, which reduces manufacturing costs while ensuring smooth movement of the slide rail.

[0039] Specifically, such as Figures 2-5 As shown, the slider 5 has an inner mounting groove 5d that engages with the connecting plate 1a2. The slider 5 also has raised ribs 5a on its outer side and bottom that slide against the assembly cavity 2c. The bottom of the inner mounting groove 5d in the width direction of the slider 5 has raised ribs 5a that abut against the connecting plate 1a2, and the outer side has raised ribs 5a that abut against the assembly cavity 2c. This eliminates the horizontal installation gap between the slider 5, the assembly cavity 2c, and the connecting part 1a, enhancing the sliding rail fit accuracy and reducing abnormal noise caused by misalignment. The lower part of the slider 5 has an inwardly extending boss 5g, and the transition section 1a1 is supported on the boss 5g. Figure 6As shown, the connecting plate 1a2 has inwardly inclined guide slopes 1b at both ends of the top along its length, and the inner end of the guide slope 1b is connected to a groove 1c. The inner side of the mounting groove 5d of the slider 5 is provided with a protrusion 5e that cooperates with the groove 1c. The guide slope 1b fits against the groove wall of the mounting groove 5d. The cooperation between the groove 1c and the protrusion 5e enhances the connection strength between the slider 5 and the upper slide rail 1, preventing the slider 5 from loosening or falling off during sliding.

[0040] like Figure 3 and Figure 5 As shown, the top of the slider 5 has mounting notches 5b at both ends, and spring plates 6 are installed in each mounting notch 5b. Elastic support seats 5f extend inward from the side walls of the mounting notches 5b, and slots 5c are provided above the elastic support seats 5f. Both ends of the spring plates 6 are supported on the elastic support seats 5f and inserted into the slots 5c on both sides. The middle of the spring plate 6 has an upward-convex arch shape, and the top of the arch shape supports the top of the assembly cavity 2c. This elastic support structure of the spring plate 6 provides elastic preload to the top of the assembly cavity 2c, effectively eliminating the dynamic gap generated during the sliding process between the upper slide rail 1 and the lower slide rail 2, and suppressing vibration and noise during sliding. The elastic support seats 5f and slots 5c limit the position of the spring plate 6, preventing its displacement and failure, continuously ensuring a tight fit between the slide rails, and optimizing the quietness and structural stability during seat adjustment.

[0041] like Figure 2 As shown, in this embodiment, the connecting part 1a is embedded in the assembly cavity 2c, and the slider 5 is in close contact with the assembly cavity 2c and the connecting part 1a through the protruding rib 5a, respectively, eliminating the installation gap in the horizontal direction. This effectively suppresses the offset and shaking of the upper slide rail 1 and the lower slide rail 2 caused by assembly errors, and reduces abnormal noise caused by friction and collision between components. At the same time, the spring plate 6 is supported on the top of the assembly cavity 2c with an arched shape, continuously providing elastic preload, which can offset the dynamic gap caused by vibration and wear during the sliding process in real time. This ensures that the upper slide rail 1 remains stably fitted with the lower slide rail 2 throughout the adjustment process, making the seat adjustment action smoother and more fluid, avoiding any jamming or jerking, and improving the adjustment accuracy, making the seat position control more precise.

[0042] like Figure 6 As shown, support brackets 7 are fixed at both ends inside the lower slide rail 2. Each support bracket 7 has a mounting hole 7a, and a self-lubricating bushing 8 is press-fitted into the mounting hole 7a. The two ends of the screw 42 are rotated and supported by the self-lubricating bushing 8. The self-lubricating bushing 8 can reduce the rotational resistance and wear of the screw 42, improve the transmission efficiency of the screw 42, and reduce the noise generated by friction.

[0043] like Figure 1As shown, the drive mechanism 3 is integrated onto the lower slide rail 2. The drive motor 31 and drive shaft 32 do not move with the seat and can be placed inside the car carpet. This avoids the transmission of noise from the movement of the power components and effectively isolates the noise source using the carpet, significantly reducing the perceived noise inside the car and improving sound quality. At the same time, it provides ample space for the seat auxiliary functions, greatly reducing the seat frame block value and optimizing the integration of seat functions and space utilization efficiency. When it is necessary to adjust the position of the car seat, the motor 31 is started. The power output of the motor 31 is transmitted to the reduction gearbox 41 through the drive shaft 32. The reduction gearbox 41 reduces the power and increases the torque, driving the screw 42 to rotate. Since the nut sleeve 43 is threadedly connected to the screw 42 and the nut sleeve 43 is fixedly connected inside the upper slide rail 1, the rotation of the screw 42 causes the nut sleeve 43 and the upper slide rail 1 to slide back and forth relative to the lower slide rail 2, thereby realizing the back and forth adjustment of the car seat.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. An electric sliding rail for a car seat, comprising a left sliding rail assembly (A) and a right sliding rail assembly (B), each comprising a lower sliding rail (2), an upper sliding rail (1) slidably connected within the lower sliding rail (2), and a transmission mechanism (4) installed between the upper sliding rail (1) and the lower sliding rail (2), wherein a drive mechanism (3) is provided between the left sliding rail assembly (A) and the right sliding rail assembly (B), characterized in that: The transmission mechanism (4) includes a reduction gearbox (41), a screw (42) and a nut sleeve (43) threadedly connected to the screw (42). The nut sleeve (43) is fixedly connected in the upper slide rail (1). The screw (42) is rotatably installed in the lower slide rail (2). The reduction gearbox (41) is poweredly connected to the end of the screw (42). The drive mechanism (3) includes a mounting bracket (33) placed horizontally between the ends of the two sets of lower slide rails (2) and a motor (31) fixedly installed in the middle section of the mounting bracket (33). The motor (31) is a dual-output motor, with a drive shaft (32) connected to each end. The end of the drive shaft (32) away from the motor (31) extends into the lower slide rail (2) and is powered by the reduction gearbox (41).

2. The electric slide rail for a car seat according to claim 1, characterized in that: The lower slide rail (2) has symmetrically arranged assembly cavities (2c) extending along its length on both sides. The upper slide rail (1) has symmetrically arranged connecting parts (1a) on both sides. The two connecting parts (1a) are located in the two assembly cavities (2c) respectively. A slider (5) is arranged between the connecting part (1a) and the assembly cavity (2c). The slider (5) is fixedly connected to the connecting part (1a). The bottom and outer side of the slider (5) slide in cooperation with the assembly cavity (2c).

3. The electric sliding rail for a car seat according to claim 2, characterized in that: The assembly cavity (2c) is open at the lower end inside the lower slide rail (2). The connecting part (1a) includes a transition section (1a1) extending outward from the lower end of the upper slide rail (1) and a connecting plate (1a2) extending upward from the outer end of the transition section (1a1). The connecting plate (1a2) extends upward into the assembly cavity (2c) from the lower end of the opening. The slider (5) has an installation groove (5d) on its inner side that is fastened to the connecting plate (1a2). The slider (5) has a raised rib (5a) on its outer side and bottom that slides against the assembly cavity (2c).

4. The electric sliding rail for a car seat according to claim 3, characterized in that: The connecting plate (1a2) has inwardly inclined guide slopes (1b) at both ends of the top along the length direction, and the inner end of the guide slope (1b) is connected to a groove (1c). The inner side of the mounting groove (5d) of the slider (5) is provided with a protrusion (5e) that cooperates with the groove (1c). The guide slope (1b) fits against the groove wall of the mounting groove (5d). And / or, the lower part of the slider (5) is provided with an inwardly extending boss (5g), and the transition section (1a1) is supported on the boss (5g).

5. The electric sliding rail for a car seat according to claim 2, characterized in that: The slider (5) has mounting notches (5b) at both ends of its top, and spring plates (6) are installed in each mounting notch (5b); The mounting notch (5b) has elastic support seats (5f) extending inward from both sides of the sidewalls. The elastic support seats (5f) have slots (5c) above them. Both ends of the spring sheet (6) are supported on the elastic support seats (5f) and inserted into the slots (5c) on both sides respectively. The middle part of the spring sheet (6) has an upward convex arc shape, and the top of the arc shape is supported on the top of the assembly cavity (2c).

6. The electric slide rail for a car seat according to claim 1, characterized in that: The lower slide rail (2) has support brackets (7) fixed at both ends inside. Each support bracket (7) has a mounting hole (7a). A self-lubricating bushing (8) is press-fitted into the mounting hole (7a). The screw (42) is rotated and supported at both ends by the self-lubricating bushing (8).

7. The electric slide rail for a car seat according to claim 1, characterized in that: The reduction gearbox (41) is fixedly installed inside the lower slide rail (2) by a fixed bracket (9), and a rubber pad (10) is fitted around the outer periphery of the reduction gearbox (41).

8. The electric slide rail for a car seat according to claim 1, characterized in that: The upper slide rail (1) is fixedly installed with a bearing seat (11). The bearing seat (11) has downwardly extending side support sections (11a) at both ends. The side support sections (11a) are provided with screw through holes (11b). The nut sleeve (43) is clamped between the two sets of side support sections (11a) by a rubber pad (10). The screw passes through the two screw through holes (11b) and the nut sleeve (43). And / or, the nut sleeve (43) has a rectangular block structure on the outside, and positioning grooves (43a) are provided on the upper side and the front and rear sides of the rectangular block structure. The rubber pad (10) is covered in the positioning grooves (43a) on the upper side and the front and rear sides of the rectangular block structure.

9. The electric slide rail for a car seat according to claim 1, characterized in that: Both ends of the mounting bracket (33) have outwardly extending lugs (33a), which are fixed to the side of the lower rail (2) by bolts.

10. The electric slide rail for a car seat according to claim 3, characterized in that: The slider (5) has a raised rib (5a) at the bottom of the inner mounting groove (5d) in the width direction that abuts against the connecting plate (1a2), and a raised rib (5a) at the outer side that abuts against the assembly cavity (2c).

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