Multi-directional adjustment electric drive mechanism for car seat

Abstract

The utility model relates to the technical field of automobile seat, disclose a kind of automobile seat multidirectional adjustment electric transmission mechanism, including lower rail, upper rail and ball, the ball respectively with upper rail, lower rail rolling fit, so that the upper rail can slide along the length direction of lower rail, at least two support seats are provided in the inner wall of lower rail, the inner wall of support seat is rotatably connected with gyro wheel, and the gyro wheel top is supported in the bottom of upper rail.The utility model structure design is reasonable, and support structure formed by setting ball and gyro wheel, form the multi-point, surface contact support of gyro wheel bottom bearing and ball lateral direction guiding, increase the support contact area, disperse the pressure, solve the defect of single ball pressure concentration, avoid the deformation or wear of ball and track due to overload, reduce the relative friction resistance between upper rail and lower rail, guarantee the smoothness of upper rail sliding.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and more specifically, to an electric transmission mechanism for multi-directional adjustment of automotive seats. Background Technology

[0002] Currently, in order to improve the comfort of car seats, car seats generally include a seat body and a sliding rail mechanism. The seat body is mounted on the vehicle chassis via the sliding rail mechanism, which allows the seat body to move a certain distance relative to the vehicle chassis to adapt to different needs.

[0003] The general structure of existing car seat sliding rails is as follows: The fixed rail is fixed to the bottom of the car body using connecting bolts. The sliding rail passes through the fixed rail and can slide within it. The upper part of the sliding rail is fixedly connected to the car seat, allowing the seat to slide back and forth along the rail. Ball bearings are installed between the fixed and sliding rails, enabling smooth sliding between them when they are engaged.

[0004] For example, the patent CN207000230U discloses a locking mechanism for car seat slide rails. In this patent, ball bearings are provided between the outer flange of the lower part of the upper rail and the horizontal edge of the inverted U-shaped lower part of the lower rail. The upper ball bearings or rollers and the lower ball bearings are axially positioned by a retainer. However, after long-term use, under the condition of being supported by the ball bearings, the contact between the ball bearings and the rail is point contact. The support points are dispersed and the contact area is small. The weight and load pressure of the upper rail will be concentrated on the ball bearings. When the seat carries heavy items or the driver and passenger are heavy, the contact surface between the ball bearings and the rail will be deformed or worn, affecting the smoothness of sliding. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a multi-directional adjustable electric transmission mechanism for automotive seats. By setting up a support structure composed of balls and rollers, it forms multi-point, surface contact support with lateral guidance of the balls and bottom bearing of the rollers. This increases the support contact area, disperses the pressure, solves the defect of concentrated pressure on a single ball, avoids deformation or wear of the balls and tracks due to overload, reduces the relative frictional resistance between the upper and lower tracks, and ensures smooth sliding of the upper track.

[0006] To achieve the above objectives, the multi-directional adjustment electric drive mechanism for automobile seats proposed in this utility model adopts the following technical solution:

[0007] The multi-directional adjustable electric transmission mechanism for car seats includes a lower rail, an upper rail, and ball bearings. The ball bearings roll in cooperation with the upper rail and the lower rail respectively, allowing the upper rail to slide along the length of the lower rail. The inner wall of the lower rail is provided with at least two support seats, and each support seat has a roller rotatably connected to its inner wall. The top of the roller is supported on the bottom of the upper rail.

[0008] Through the above technical solution, the roller and the ball simultaneously support the upper rail, transforming the point contact support of a single ball into multi-point and surface contact between the ball and the roller. This can disperse the bearing pressure and prevent deformation or wear of the ball and the rail due to pressure concentration.

[0009] Preferably, a transmission component and a lubrication component are installed inside the support base. The transmission component is connected to the lubrication component. Both ends of the roller are fixedly connected to drive wheels. The drive wheels drive the lubrication component to spray lubricant onto the roller through the transmission component.

[0010] The above technical solution uses rollers to drive the lubricant spray, achieving automatic lubrication without the need for an additional power source. The lubricant acts on the rollers, reducing wear between the rollers and the upper rail, and making the sliding smoother.

[0011] Preferably, the transmission assembly includes a rotating shaft and a transmission wheel. The transmission wheel is fixedly connected to the rotating shaft. Both ends of the rotating shaft pass through the support base and are rotatably connected to it. The outer wall of the transmission wheel is provided with an arc-shaped protrusion. The drive wheel is connected to the transmission wheel and drives the transmission wheel to rotate.

[0012] The above technical solution uses the rotation of the roller to drive the transmission wheel to rotate, and applies pressure to the transmission wheel through the arc-shaped protrusion.

[0013] Preferably, the transmission assembly further includes a guide rod, with both ends of the guide rod fixedly connected to the inner wall of the support seat. A return spring is sleeved on the outer wall of the guide rod, and two steering seats are slidably connected to the outer wall of the guide rod. Both ends of the return spring are fixedly connected to the steering seats. A connecting arm one is rotatably connected to the inner wall of one steering seat, and a connecting arm two is rotatably connected to the inner wall of the other steering seat. The connecting arm one and the connecting arm two are rotatably connected to the rotating shaft, and a transmission arm is rotatably connected to the outer wall of each steering seat.

[0014] Through the above technical solution, the guide rod provides guidance for the steering seat, ensuring the smooth movement of the steering seat and avoiding deviation during transmission.

[0015] Preferably, the lubrication assembly includes a cylinder body, which is fixedly connected to a support base. Piston rods are slidably connected to both ends of the cylinder body. A lubrication piston is fixedly connected to one end of the piston rod located inside the cylinder body. The outer wall of the piston rod is rotatably connected to the transmission arm.

[0016] Through the above technical solution, the cylinder, piston rod, and lubrication piston form a pressurization structure that can spray out lubricating fluid to ensure that the lubricating fluid evenly covers the lubrication parts.

[0017] Preferably, the lubrication assembly further includes a fuel injector, the fuel injector inlet pipe extending into and fixedly connected to the cylinder body, and a second one-way valve fixedly connected to the outer wall of the fuel injector inlet pipe. The lubrication assembly also includes an oil guide pipe, the outer wall of which is fixedly connected to a first one-way valve, and the end of the oil guide pipe is connected to an external oil supply tank.

[0018] Through the above technical solution, one-way valve one and one-way valve two control the direction of lubricant intake and spraying, respectively, to prevent lubricant backflow.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By setting up a support structure composed of balls and rollers, based on the original rolling contact of balls, the top of the rollers supports the bottom of the upper rail. This expands the point contact support of a single ball into a multi-point, surface contact support with lateral ball guidance and bottom roller bearing. This increases the support contact area, disperses the weight pressure of the upper rail and the load, solves the defect of concentrated pressure from a single ball, and avoids deformation or wear of the balls and rails due to overload. Furthermore, the rollers roll synchronously with the upper rail, working with the balls to reduce the relative frictional resistance between the upper and lower rails, ensuring the smooth sliding of the upper rail.

[0021] 2. The lubricant is sprayed by the rolling of the rollers, which eliminates the need for an additional power source and achieves automatic lubrication. The lubricant acts on the rollers, which can reduce the wear between the rollers and the upper rail and make the sliding smoother. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the lower rail of this utility model;

[0024] Figure 3 This is a schematic diagram of the upper rail structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the ball bearing installation structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the installation structure of the roller of this utility model;

[0027] Figure 6 This is a schematic diagram of the installation structure of the transmission wheel of this utility model;

[0028] Figure 7This is a schematic diagram of the installation structure of the lubricating piston of this utility model;

[0029] Figure 8 This is a schematic diagram of the installation structure of the steering seat of this utility model.

[0030] In the diagram: 1. Lower rail; 2. Upper rail; 3. Ball bearing; 4. Support seat; 5. Roller; 6. Shaft; 7. Drive wheel; 8. Connecting arm one; 9. Connecting arm two; 10. Steering seat; 11. Drive arm; 12. Guide rod; 13. Cylinder body; 14. Piston rod; 15. Lubricating piston; 16. Oil guide pipe; 17. One-way valve one; 18. Injector; 19. One-way valve two; 20. Return spring; 21. Drive wheel. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Existing electric drive mechanisms for multi-directional adjustment of car seats mostly adopt a structure in which a lower rail, an upper rail, and ball bearings work together. The ball bearings reduce the sliding friction between the rails to achieve smooth sliding of the seat in the fore-and-aft direction. However, in integrated systems that realize multi-directional adjustment functions such as seat height and backrest angle, the load-bearing and wear problems of the sliding rails are particularly prominent. Wear between the ball bearings and the lower and upper rails is a common problem in the automotive industry, mainly caused by excessive load on the seat. Especially during multi-directional adjustment, the seat is subjected to complex forces in different directions. If the sliding rails do not provide sufficient support, it can easily lead to poor adjustment, abnormal noise, or premature damage.

[0033] like Figures 1-4 As shown, a multi-directional adjustable electric transmission mechanism for an automobile seat includes a lower rail 1, an upper rail 2, and ball bearings 3. The ball bearings 3 roll in contact with both the upper rail 2 and the lower rail 1, allowing the upper rail 2 to slide along the length of the lower rail 1. At least two support seats 4 are provided on the inner wall of the lower rail 1, and rollers 5 are rotatably connected to the inner walls of each support seat 4. The tops of the rollers 5 are supported on the bottom of the upper rail 2. The rollers 5 and the ball bearings 3 simultaneously support the upper rail 2, transforming the point contact support of a single ball bearing 3 into multi-point, surface contact between the ball bearing 3 and the rollers 5. This disperses the load-bearing pressure and prevents deformation or wear of the ball bearings 3 and the rail due to concentrated pressure.

[0034] By setting up a composite support structure consisting of ball bearings 3 and rollers 5, the rollers 5 provide surface contact support from the bottom to the upper rail 2, in addition to the lateral guidance and rolling provided by the ball bearings 3. This will provide better load distribution when the seat is adjusted in multiple directions, such as forward and backward sliding, height adjustment, and backrest reclining.

[0035] Roller 5 is made of high wear-resistant nylon or surface-hardened steel to enhance its load-bearing capacity and wear resistance.

[0036] like Figures 5-8 The support base 4 shown contains a transmission assembly and a lubrication assembly. Both ends of the roller 5 are fixedly connected to drive wheels 21, which are gears or friction wheels made of engineering plastic or metal with a wear-resistant coating. The drive wheels 21 are connected to the transmission wheel 7 via gear meshing or friction transmission. The outer wall of the transmission wheel 7 has arc-shaped protrusions or toothed structures to convert the rotational motion of the drive wheels 21 into the reciprocating motion of the shaft 6. The roller 5 drives the lubricant spray, achieving automatic lubrication without an additional power source. The lubricant acts on the roller 5, reducing wear between the roller 5 and the upper rail 2, and making sliding smoother.

[0037] The transmission assembly includes a rotating shaft 6 and a transmission wheel 7. The transmission wheel 7 is fixedly connected to the rotating shaft 6. Both ends of the rotating shaft 6 pass through the support base 4 and are rotatably connected to it. The outer wall of the transmission wheel 7 has an arc-shaped protrusion. The drive wheel 21 is connected to the transmission wheel 7 and drives the transmission wheel 7 to rotate. The rotation of the roller 5 drives the transmission wheel 7 to rotate, and pressure is applied to the transmission wheel 7 through the arc-shaped protrusion.

[0038] In some embodiments, to prevent slippage between the drive wheel 21 and the transmission wheel 7 during transmission, the drive wheel 21 is made of high-strength nylon with helical teeth on its outer circumferential surface. The transmission wheel 7 is made of surface-hardened 45# steel, and its arc-shaped protrusion has toothed structures that mesh with the helical teeth of the drive wheel. Through toothed engagement, it is ensured that the roller 5 can reliably drive the transmission wheel 7 to rotate, avoiding slippage caused by lubrication or load changes.

[0039] The transmission assembly also includes a guide rod 12, with both ends of the guide rod 12 fixedly connected to the inner wall of the support base 4. A return spring 20 is sleeved on the outer wall of the guide rod 12. Two steering seats 10 are slidably connected to the outer wall of the guide rod 12. Both ends of the return spring 20 are fixedly connected to the steering seats 10. A connecting arm 8 is rotatably connected to the inner wall of one steering seat 10, and a connecting arm 9 is rotatably connected to the inner wall of the other steering seat 10. Connecting arms 8 and 9 are rotatably connected to the rotating shaft 6. Transmission arms 11 are rotatably connected to the outer wall of each steering seat 10. The guide rod 12 provides guidance for the steering seats 10, ensuring the smooth movement of the steering seats 10 and preventing deviation during transmission.

[0040] The lubrication assembly includes a cylinder body 13, which is fixedly connected to a support base 4. Piston rods 14 are slidably connected to both ends of the cylinder body 13. A lubrication piston 15 is fixedly connected to one end of the piston rod 14 located inside the cylinder body 13. The outer wall of the piston rod 14 is rotatably connected to a transmission arm 11. The cylinder body 13, piston rods 14, and lubrication piston 15 form a pressurizing structure that can spray out lubricant, ensuring that the lubricant evenly covers the lubrication points.

[0041] The lubrication assembly also includes a fuel injector 18, whose inlet pipe extends into and is fixedly connected to the cylinder block 13. A second check valve 19 is fixedly connected to the outer wall of the inlet pipe of the fuel injector 18. The lubrication assembly also includes an oil guide pipe 16, with a first check valve 17 fixedly connected to its outer wall. The end of the oil guide pipe 16 is connected to an external oil supply tank. The first check valve 17 and the second check valve 19 respectively control the direction of lubricant intake and discharge to prevent backflow of lubricant.

[0042] In one embodiment of this utility model, the electric transmission mechanism is integrated into a car driver's seat with six-way electric adjustment, including fore-and-aft sliding, front lifting, rear lifting, and backrest tilt. The lower rail 1 is fixed to the car floor, and the upper rail 2 is connected to the seat frame. When the user operates the control switch to adjust the fore-and-aft position, the dedicated slide rail drive motor works, driving the upper rail 2 to slide smoothly through the ball bearings 3 and supported by the rollers 5. When the user adjusts the height of the front or rear of the seat, the lifting motor pushes one side of the seat frame to move vertically. At this time, the sliding rail does not simply bear axial force, but also generates torque due to changes in the seat posture. The bottom surface support design of the rollers 5 in this mechanism provides a larger anti-overturning contact area, working together with the ball bearings 3 to stabilize the rail, preventing jamming or abnormal noise due to local stress surges, and ensuring a smooth experience under multi-directional movement switching and complex force. Throughout the entire use process, whenever the seat moves back and forth, the roller 5 will rotate, and fresh lubricant from the oil supply tank will be sprayed onto the bearing surface of the roller 5 and the surrounding area through the oil injector 18 at regular intervals and in a measured manner, achieving maintenance-free lubrication.

[0043] The implementation principle of this application is as follows: When the upper rail 2 slides along the length of the lower rail 1, the ball bearings 3 roll and cooperate with the upper rail 2 and the lower rail 1 respectively. The top of the roller 5 on the inner wall support seat 4 of the lower rail 1 contacts the bottom of the upper rail 2 and rolls synchronously with the upper rail 2, providing auxiliary support for the upper rail 2. When the roller 5 rolls, the drive wheels 21 at both ends drive the transmission wheel 7 to rotate. When the protrusion of the transmission wheel 7 contacts the drive wheel 21, the transmission wheel 7 drives the rotating shaft 6 to move downward. Through the connecting arm 1 8 and the connecting arm 2 9 respectively, the steering seat 10 is pushed to slide along the guide rod 12. The return spring 20 is stretched, and the steering seat 10 drives the transmission wheel 6 to move downward. The boom 11 swings, and the transmission arm 11 pushes the piston rod 14 to move axially along the cylinder body 13, causing the two lubrication pistons 15 to move in opposite directions inside the cylinder body 13. The pressure inside the cylinder body 13 increases, and the lubricant is sprayed out through the oil inlet pipe of the injector 18. The second check valve 19 opens, and the lubricant is sprayed onto the surface of the roller 5 and the rolling contact part. When the transmission wheel 7 protrudes and disengages from the drive wheel 21, the return spring 20 contracts. When the piston rod 14 moves in the opposite direction, a negative pressure is formed inside the cylinder body 13. The lubricant in the external oil supply tank is drawn into the cylinder body 13 through the oil guide pipe 16. The first check valve 17 opens, completing the lubricant replenishment.

[0044] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A multi-directional adjustable electric transmission mechanism for a car seat, comprising a lower rail (1), an upper rail (2), and ball bearings (3), characterized in that: The ball bearings (3) roll in cooperation with the upper rail (2) and the lower rail (1) respectively, so that the upper rail (2) can slide along the length of the lower rail (1). The inner wall of the lower rail (1) is provided with at least two support seats (4), and the inner wall of each support seat (4) is rotatably connected with a roller (5). The top of the roller (5) is supported on the bottom of the upper rail (2).

2. The multi-directional adjustable electric drive mechanism for automobile seats according to claim 1, characterized in that: The support base (4) is equipped with a transmission component and a lubrication component. The transmission component is connected to the lubrication component. Both ends of the roller (5) are fixedly connected to drive wheels (21). The drive wheels (21) drive the lubrication component to spray lubricant onto the roller (5) through the transmission component.

3. The multi-directional adjustable electric drive mechanism for automobile seats according to claim 2, characterized in that: The transmission assembly includes a rotating shaft (6) and a transmission wheel (7). The transmission wheel (7) is fixedly connected to the rotating shaft (6). Both ends of the rotating shaft (6) pass through the support base (4) and are rotatably connected to it. The outer wall of the transmission wheel (7) is provided with an arc-shaped protrusion. The drive wheel (21) is connected to the transmission wheel (7) and drives the transmission wheel (7) to rotate.

4. The multi-directional adjustable electric drive mechanism for automobile seats according to claim 3, characterized in that: The transmission assembly also includes a guide rod (12), both ends of which are fixedly connected to the inner wall of the support seat (4). A return spring (20) is sleeved on the outer wall of the guide rod (12). Two steering seats (10) are slidably connected to the outer wall of the guide rod (12). Both ends of the return spring (20) are fixedly connected to the steering seats (10). One of the steering seats (10) is rotatably connected to the inner wall of the inner wall of the inner wall of the outer wall of the other steering seat (10). The first connecting arm (8) and the second connecting arm (9) are rotatably connected to the rotating shaft (6). The outer wall of each steering seat (10) is rotatably connected to a transmission arm (11).

5. The multi-directional adjustable electric drive mechanism for automobile seats according to claim 4, characterized in that: The lubrication assembly includes a cylinder (13), which is fixedly connected to the support base (4). Both ends of the cylinder (13) are slidably connected to piston rods (14). One end of the piston rod (14) located inside the cylinder (13) is fixedly connected to a lubrication piston (15). The outer wall of the piston rod (14) is rotatably connected to the transmission arm (11).

6. The multi-directional adjustable electric drive mechanism for automobile seats according to claim 5, characterized in that: The lubrication assembly also includes an oil injector (18), the oil inlet pipe of the oil injector (18) extends into the cylinder body (13) and is fixedly connected thereto, and a one-way valve (19) is fixedly connected to the outer wall of the oil inlet pipe of the oil injector (18).

7. The multi-directional adjustable electric drive mechanism for automobile seats according to claim 6, characterized in that: The lubrication assembly also includes an oil guide pipe (16), a one-way valve (17) is fixedly connected to the outer wall of the oil guide pipe (16), and the end of the oil guide pipe (16) is connected to an external oil supply tank.

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