Driving mechanism of electric slide rail for vehicle seat

Abstract

A driving mechanism for an electric slide rail for a vehicle seat comprises a pair of outer slide rails, the outer slide rails are connected to the inner slide rails, the inner slide rails are provided with inner slide rail sliding support frames and anti-backlash components at both the front and rear ends of the inner slide rails, and a screw is provided in the inner cavity of the outer slide rails; Features: The driving mechanism comprises a sliding frame plate, a driving motor and a gear box, the sliding frame plate is vertically arranged on the upper surface of the inner slide rail, and the driving motor is installed in the middle of the sliding frame plate; the gear box is horizontally arranged in the inner cavity of the outer slide rail and is passed through the screw; a gear box fixing bracket is also installed on the gear box, the bracket is fixed to the inner slide rail and there is a distance between the bracket and the bottom panel of the outer slide rail, a locking bolt is arranged on the bottom panel of the outer slide rail, the gear box fixing bracket can move above the locking bolt, and the transmission shaft of the driving motor is connected to the transmission component inside the gear box. The structure is simple and compact, ensuring that the working power requirement of the driving motor is relatively small, reducing heat generation and reducing abnormal sounds and noises under working conditions, and ensuring a greater total output power; saving space and improving installation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seat accessories, and in particular relates to a driving mechanism of an electric slide rail for a vehicle seat. Background Art

[0002] With the continuous improvement of the intelligence level of my country's automobile industry and the rapid development of unmanned driving technology, the seats that originally only existed in large-space models with multiple rows of seats such as MPVs and use long slides for long-stroke adjustment have become the focus of current smart car research and development; the above-mentioned car seat slides are responsible for changing the front and rear position of the seat and locking it. This device is one of the must-have devices on car seats. With the continuous advancement of electrification technology, the position adjustment method of vehicle seats has gradually changed from manual adjustment to electric adjustment. Most of the existing electric slide rail devices have a pair of lower slide rails arranged on the bottom plate of the vehicle body, and the two lower slide rails correspond to the left and right sides of the bottom of the vehicle seat respectively, and an upper slide rail is slidably connected to the lower slide rail, and the upper slide rail is connected to the vehicle seat. A gear box and a screw rod with transmission connection are also arranged in the lower slide rail, and a laterally extending motor bracket is also installed between the two lower slide rails. The motor bracket is generally located above the upper slide rails on the left and right sides, and a motor is installed on the motor bracket. The motor is connected to the gear boxes on the left and right sides through the motor shaft. The motor drives the gear box to move forward and backward on the screw rod and realizes the movement of the upper slide rail connected to the gear box, thereby realizing the adjustment of the front and rear position of the vehicle seat.

[0003] Relevant technical information about electric track devices for vehicle seats can be found in the public Chinese patent documents, such as CN202557331U (an electric slide rail for vehicle seats), CN216331569U (an electric long slide rail that helps improve transmission noise), CN112537231A (an automatic slide rail device for vehicle seats), etc. A typical example is the "electric long slide rail for vehicle seats and its transmission method" provided by the Chinese patent document with the Chinese invention patent authorization number CN113147527B, which includes a right slide rail and a left slide rail. The right slide rail and the left slide rail both include an upper slide rail and a lower slide rail that are slidably connected to each other, as well as a screw transmission mechanism and a gearbox. The screw transmission mechanism includes a screw and two linked worm gear transmission boxes. The screw is connected to the two worm gear transmission boxes in a transmission manner. The screw is fixedly mounted on the lower slide rail. The gearbox and the two worm gear transmission boxes are mounted on the upper slide rail. The gearbox The motor assembly is provided between the left and right slide rails, and the two ends of the cross bracket are respectively fixedly connected to the two upper slide rails of the right and left slide rails. The two output shaft ends of the double-axis motor are connected to the rotating shaft, and the two rotating shafts are respectively connected to the two gearboxes. Although it has the advantages of two linked worm gear transmission boxes connected to the screw rod, high strength and the screw rod is not easily flexed and deformed, and it is convenient to install the motor; but the length The slide rail structure still has the common drawbacks of the slide rail structure in the prior art: that is, a single dual-axis motor is set to drive the gearboxes on both sides to realize the movement of the upper slide rail. On the one hand, not only is the component structure complex, the number of components is large, and it occupies more space. On the other hand, a single motor drives the slide rails on both sides to move at the same time, which is bound to require the motor to have a large power. Not only is the cost high, but it will also vibrate and shake when it starts working. At the same time, this motor will generate obvious heat during operation, there will be a large abnormal noise during operation, and the power loss during operation is large, and it is impossible to ensure the output of a large torque, so the applicability is poor. In addition, since a cross bracket needs to be set between the slide rails on both sides to accommodate the motor, this will greatly occupy the space at the bottom of the seat. When foreign objects enter, there is a risk of interference with the motor, the cross bracket and the motor shaft, increasing the safety risk of operation. Finally, the existing lower slide rail fixedly connected to the vehicle body bottom plate has a complex internal structure. When it is installed with the vehicle body bottom plate, it is usually necessary to install a fixing frame and other connecting components at the bottom of the lower slide rail, which is not only cumbersome to install, but also causes unnecessary increase in component costs.

[0004] In view of the above situation, it is necessary to design a driving mechanism of the slide rails with simple structure and high strength, which can effectively solve the problem caused by the same motor driving two sets of slide rails. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Summary of the invention

[0005] The task of the present invention is to provide a kind of electric slide rail driving mechanism for vehicle seats which has the advantages of compact structure, convenient installation, high strength and wide application range, which helps to effectively improve transmission efficiency and reduce abnormal noise by abandoning the original driving mode of two sets of slide rails driven by the same motor and adopting a single motor to drive the single-side slide rail respectively, and is conducive to simplifying the transmission mode to reduce the number of parts and improve installation efficiency, and is convenient to optimize the internal structure to realize the direct connection between the outer slide rail bottom panel and the vehicle body bottom panel by bolts, thereby releasing the bottom space of the vehicle and reducing production costs.

[0006] The task of the present invention is accomplished in this way: a driving mechanism of an electric slide rail for a vehicle seat, the electric slide rail comprising a pair of outer slide rails, each of which is slidably connected to an inner slide rail, and an outer slide rail inner cavity is formed inside the outer slide rail, and an outer slide rail opening groove opening upward is formed on the upper part of the outer slide rail, the outer slide rail also has an outer slide rail bottom panel, the inner slide rail is arranged on the top of the outer slide rail and corresponds to the position of the outer slide rail opening groove, and an inner slide rail sliding support frame and a gap elimination component that can roll on the outer slide rail bottom panel are respectively arranged at the front and rear end portions in the length direction of the inner slide rail, and a screw rod extending along the length direction thereof is fixedly installed in the outer slide rail inner cavity; the characteristic is that: the driving mechanism has a sliding frame plate fixedly connected to the vehicle seat, a driving motor and a gear box, the sliding frame plate is vertically arranged and installed on the inner slide rail On the upper side surface, the driving motor is installed at the middle position in the length direction of the sliding frame plate and is connected with a transmission shaft; the gear box is horizontally arranged in the inner cavity of the outer slide rail and penetrated on the screw rod body, and the gear box is slidably connected with the screw rod through the gear transmission assembly inside it; a gear box fixing bracket is also installed on the gear box, and the gear box fixing bracket is fixedly installed with the inner slide rail to realize the connection between the gear box and the inner slide rail, and there is a distance between the gear box fixing bracket and the bottom panel of the outer slide rail, and a plurality of locking bolts are also penetrated on the outer slide rail bottom panel of the outer slide rail, the gear box fixing bracket can reciprocate at the position above the plurality of locking bolts, and the transmission shaft of the driving motor extends downward and passes through the inner slide rail to probe into the inner cavity of the outer slide rail to realize transmission connection with the transmission assembly inside the gear box.

[0007] In a specific embodiment of the present invention, a transmission shaft cover is fixedly installed on one side surface of the sliding frame and at a position corresponding to the bottom of the driving motor. A transmission shaft positioning protective sleeve is also protruded from the middle of the transmission shaft cover, and the transmission shaft sleeve of the driving motor is arranged in the transmission shaft positioning protective sleeve.

[0008] In another specific embodiment of the present invention, a sliding frame connecting nut is installed on the top of both ends of the sliding frame in the length direction, and the sliding frame is fixedly connected to the car seat through the two sliding frame connecting nuts.

[0009] In another specific embodiment of the present invention, the gear box fixing bracket is provided with a gear box fixing bracket bottom panel and a pair of gear box fixing bracket side panels formed on the front and rear sides of the gear box fixing bracket bottom panel, two gear box fixing bracket connecting protrusions are formed on the top parts of the pair of gear box fixing bracket side panels, and an inner slide rail positioning groove is formed on the inner slide rail at a position corresponding to the gear box fixing bracket connecting protrusion, and a plurality of the gear box fixing bracket connecting protrusions are cooperated and installed in their respective corresponding inner slide rail positioning grooves, thereby realizing the positioning connection between the gear box fixing bracket and the inner slide rail body.

[0010] In another specific embodiment of the present invention, a locking bolt clearance groove is further provided at the bottom portion of the gear box fixing bracket, and the nut of the locking bolt installed on the bottom panel of the outer slide rail can pass through the locking bolt clearance groove during the movement of the gear box fixing bracket.

[0011] In another specific embodiment of the present invention, the outer slide rail is a square tube structure with an opening facing upward. The outer slide rail also has outer slide rail side panels formed on both sides of the outer slide rail bottom panel, and an outer slide rail bending portion is respectively formed at the top edge portions of the two outer slide rail side panels, and the cross-section of the outer slide rail bending portion is a "∩"-shaped structure with an opening facing downward, and an inner slide rail bending portion is also formed at the left and right side edges in the length direction of the inner slide rail, and the cross-section of the inner slide rail bending portion is a "U"-shaped structure with an opening facing upward, and the inner slide rail bending portions on both sides of the inner slide rail respectively cooperate with their respective corresponding outer slide rail bending portions to realize the sliding cooperation between the inner slide rail and the outer slide rail.

[0012] In a further specific embodiment of the present invention, a dust-proof strip assembly is further provided on the upper part of the outer slide rail, and the dust-proof strip assembly includes a pair of main dust-proof strips, a pair of dust-proof strip reinforcement frames and a plurality of dust-proof strip brackets; the two dust-proof strip reinforcement frames are L-shaped plate structured and are respectively arranged on the corresponding outer slide rail bending parts, and a dust-proof strip reinforcement frame support seat is further provided at the lower position of the two end portions in the length direction of the two dust-proof strip reinforcement frames, the dust-proof strip reinforcement frame support seat is positioned and installed on the outer slide rail bottom panel of the outer slide rail, and the two main dust-proof strips are respectively arranged ... They are respectively arranged on two dust-proof strip reinforcement frames, and the two main dust-proof strips each include a horizontally arranged main dust-proof strip transverse plate and a main dust-proof strip vertical plate formed at the bottom of the main dust-proof strip transverse plate. The main dust-proof strip transverse plates of the two main dust-proof strips are arranged on the upper part of the outer slide rail opening groove and jointly cover the outer slide rail opening groove, and a plurality of dust-proof strip brackets are installed at intervals on the outer slide rail side panels on the left and right sides of the outer slide rail and are arranged along the vertical direction, and the top ends of the dust-proof strip brackets are connected to the corresponding main dust-proof strips, thereby realizing the positioning and installation of the main dust-proof strip and the outer slide rail.

[0013] In a more specific embodiment of the present invention, a front screw rod support and a rear screw rod support are respectively provided at the front and rear sides in the length direction of the screw rod, and the front and rear end portions of the screw rod in the length direction are respectively inserted into the front screw rod support and the rear screw rod support, and the front screw rod support and the rear screw rod support are both fixedly mounted on the bottom panel of the outer slide rail by a fastener; a screw rod guide sleeve is also installed on the rod body of the screw rod.

[0014] In yet another specific embodiment of the present invention, the cross-section of the inner slide rail sliding support frame on the front and rear sides of the inner slide rail is in a "convex" shape, and a rolling bearing is pivotally connected to the two side panels on the bottom of the inner slide rail sliding support frame, and a bearing pin is connected between the rolling bearing and the side panel of the inner slide rail sliding frame. The rolling bearing is supported on the outer slide rail bottom panel of the outer slide rail and can roll back and forth on it.

[0015] In yet another specific embodiment of the present invention, the gap-eliminating assembly comprises a gap-eliminating support frame, a pair of oblique friction plates and a pair of vertical friction plates; the gap-eliminating support frame comprises a gap-eliminating support frame top panel, which is fitted on a downward side surface of the inner slide rail, and the gap-eliminating support frame top panel is fixed to the inner slide rail by fasteners to achieve the connection between the gap-eliminating support frame and the inner slide rail, and an gap-eliminating support frame oblique side plate and a gap-eliminating support frame vertical side plate are respectively formed at the left and right sides of the bottom of the gap-eliminating support frame, and at the outer slide rail An outer slide rail oblique plate is also formed between the outer slide rail side panel and the outer slide rail bending portion, and the outer slide rail oblique plate is arranged corresponding to the oblique side plate of the anti-backlash support frame; a pair of oblique friction plates are respectively installed on the oblique side plates of the anti-backlash support frame on both sides of the anti-backlash support frame through fasteners, and the pair of oblique friction plates are both in contact with the inner side walls of the outer slide rail oblique plate; similarly, a pair of vertical friction plates are respectively installed on the vertical side plates of the anti-backlash support frame on both sides of the anti-backlash support frame through fasteners, and the pair of vertical friction plates are both in contact with the inner side walls of the outer slide rail side panel body.

[0016] Due to the adoption of the above structure, the present invention has the following beneficial effects compared with the prior art: firstly, by arranging a driving mechanism on a single set of outer slide rails, the original driving mode in which the two sets of slide rails are driven by the same motor is abandoned, and the inner slide rail inside the outer slide rail realizes its own forward and backward movement by driving the gear box driven by the driving motor. The internal structure is simple and compact, and can ensure that the working power requirement of the driving motor is relatively small, effectively reducing heat generation and reducing abnormal sound and noise under working conditions. At the same time, an independent driving motor is arranged on the single set of outer slide rails so that the dual-motor driving mode can ensure a greater total output power, and also effectively simplifies the gear transmission structure, so as to achieve a greater torque and power output for the car seat; in addition, since an independent driving motor is arranged on the single set of outer slide rails, the original When driven by the same motor, a machine shaft connecting frame and other retaining frames are set in the two sets of slide rails for connection, which can not only effectively save space, reduce the parts at the bottom of the seat, and improve installation efficiency; finally, since the gear box is arranged horizontally and there is a distance between the gear box fixing bracket and the bottom panel of the outer slide rail, the locking bolt that can be connected to the bottom panel of the vehicle body can be directly installed on the bottom panel of the outer slide rail during assembly, without the need to set a connecting frame, fixing plate and other connecting parts on the bottom of the outer slide rail for fixed connection with the bottom panel of the vehicle body, which further effectively simplifies the internal structure and releases the space at the bottom of the seat. The interior can also prevent components such as storage boxes, leaving room for subsequent optimization and quality improvement, and while improving operational safety, it also further improves the convenience of assembly and reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A perspective exploded view of the structure of the illustrated embodiment.

[0019] Figure 3 for Figure 1 A plan view of the internal structure of the illustrated embodiment.

[0020] In the figure: 1. outer slide rail, 11. inner cavity of outer slide rail, 12. opening groove of outer slide rail, 13. bottom panel of outer slide rail, 131. locking bolt, 14. side panel of outer slide rail, 15. bending part of outer slide rail, 16. oblique plate of outer slide rail; 2. inner slide rail, 21. sliding support frame of inner slide rail, 211. rolling bearing, 212. bearing pin, 22. anti-backlash assembly, 221. anti-backlash support frame, 2211. top panel of anti-backlash support frame, 2212. oblique side panel of anti-backlash support frame, 2213. vertical side panel of anti-backlash support frame, 222. oblique friction plate, 223. vertical friction plate, 23. positioning groove of inner slide rail, 24. bending part of inner slide rail; 3. screw rod, 31. front screw rod support Seat, 32. rear screw support, 33. screw guide sleeve; 4. sliding frame plate, 41. transmission shaft cover plate, 411. transmission shaft positioning protection sleeve, 42. sliding frame plate connecting nut; 5. driving motor, 51. transmission shaft; 6. gear box, 61. gear box fixing bracket, 611. gear box fixing bracket bottom panel, 612. gear box fixing bracket side panel, 613. gear box fixing bracket connecting protrusion, 614. locking bolt clearance groove; 7. dust strip assembly, 71. main body dust strip, 711. main body dust strip horizontal plate, 712. main body dust strip vertical plate, 72. dust strip reinforcement frame, 721. dust strip reinforcement frame support seat, 73. dust strip bracket. DETAILED DESCRIPTION

[0021] In order to more clearly understand the technical essence and beneficial effects of the present invention, it will be described in detail in the form of embodiments below. However, the description of the embodiments is not a limitation of the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical solution of the present invention.

[0022] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the corresponding Figure 1 The positions shown are for reference only and thus cannot be understood as a special limitation on the technical solution provided by the present invention.

[0023] See also Figure 1 And focus on combining Figure 2 and Figure 3, shows a driving mechanism of an electric slide rail for a vehicle seat, the electric slide rail includes a pair of outer slide rails 1 arranged relatively and positioned on the left and right sides of the bottom of the vehicle seat, an inner slide rail 2 is slidably connected to the outer slide rail 1, an outer slide rail inner cavity 11 is formed inside the outer slide rail 1, and an outer slide rail opening groove 12 with an opening upward is formed on the upper part of the outer slide rail 1, the outer slide rail 1 also has an outer slide rail bottom panel 13, the inner slide rail 2 is arranged on the top of the outer slide rail 1 and corresponds to the position of the outer slide rail opening groove 12 , and an inner slide rail sliding support frame 21 and a gap-eliminating component 22 that can roll on the outer slide rail bottom panel 13 are respectively arranged at the front and rear ends of the inner slide rail 2 in the length direction. The gap-eliminating component 22 is in contact with the inner side wall of the aforementioned outer slide rail 1. When the inner slide rail 2 slides on the outer slide rail 1, the gap-eliminating component 22 can effectively eliminate the gap between the outer slide rail 1 and the inner slide rail 2 to ensure the smooth operation of the inner slide rail 2. A screw rod 3 extending along its length direction is also fixedly installed in the aforementioned outer slide rail inner cavity 11.

[0024] As the technical key points of the technical solution provided by the present invention, the aforementioned driving mechanism comprises a sliding frame 4 fixedly connected to the car seat, a driving motor 5 and a gear box 6; the aforementioned sliding frame 4 is vertically arranged and installed on the upper side surface of the aforementioned inner slide rail 2, and the aforementioned driving motor 5 is installed at the middle position in the length direction of the aforementioned sliding frame 4 and is connected to a transmission shaft 51, and the transmission shaft 51 is a flexible shaft; the aforementioned gear box 6 is horizontally arranged in the inner cavity 11 of the aforementioned outer slide rail and penetrates the rod body of the screw rod 3, and the gear box 6 is slidably connected to the screw rod 3 through the gear transmission component inside it; on the gear box 6 A gear box fixing bracket 61 is also installed, and the gear box fixing bracket 61 is fixedly installed together with the aforementioned inner slide rail 2, so as to realize the connection between the gear box 6 and the inner slide rail 2, and there is a distance between the gear box fixing bracket 61 and the outer slide rail bottom panel 13, and a plurality of locking bolts 131 are also penetrated on the outer slide rail bottom panel 13 of the aforementioned outer slide rail 1, and the gear box fixing bracket 61 can reciprocate at the position above the plurality of locking bolts 131, and the transmission shaft 51 of the aforementioned drive motor 5 is extended downward and passes through the aforementioned inner slide rail 2 and penetrates into the aforementioned outer slide rail inner cavity 11 to realize transmission connection with the transmission component inside the aforementioned gear box 6.

[0025] During the specific installation, two independent outer slide rails 1 will be symmetrically arranged on both sides of the bottom of the vehicle seat. There is no need to connect them through a long motor shaft connecting frame and other retaining frames. Therefore, it is only necessary to ensure that the relative positions of the inner slide rails 2 on the two outer slide rails 1 remain unchanged during the actual installation before the car seat 1 can be installed. This greatly reduces the complexity of the installation process and improves the installation efficiency. At the same time, the dual-motor drive method can effectively achieve greater total output power and torque, and has a wide range of applications.

[0026] It should be noted that the aforementioned gear box 6 is arranged horizontally, and the transmission shaft 51 is arranged vertically, and its upper end is connected to the output end of the driving motor 5 to achieve transmission connection, and the lower end of the transmission shaft 51 is inserted into the upper circular hole of the gear box 6. At the same time, the screw rod 3 is connected to the internal gear transmission assembly of the gear box 6, and the driving motor 5 drives the gear box fixing bracket 61 and the inner slide rail 2 to move back and forth on the screw rod 3 through the driving transmission shaft 41 and the gear box 6 connected thereto, and the transmission method is simple and reliable; and because the gear box 6 is arranged horizontally, there is free space inside the outer slide rail inner cavity 11 inside the outer slide rail 1, and a distance is maintained between the gear box fixing bracket 61 and the outer slide rail bottom panel 13. During installation, a locking bolt 131 connected to the vehicle body bottom panel can be set between the outer slide rail bottom panel 13 without setting a connecting frame on the outer slide rail 1, thereby simplifying the installation structure of the outer slide rail 1 and the vehicle body bottom panel, facilitating assembly while also saving production costs.

[0027] Please see the Figure 2 and Figure 3 A transmission shaft cover plate 41 is fixedly installed on one side surface of the aforementioned sliding frame plate 4 and at a position corresponding to the bottom of the aforementioned driving motor 5. A transmission shaft positioning protective sleeve 411 is also protruded in the middle of the transmission shaft cover plate 41, and the transmission shaft 51 of the aforementioned driving motor 5 is sleeved in the transmission shaft positioning protective sleeve 411.

[0028] Furthermore, a sliding frame connecting nut 42 is installed on the top of both ends of the sliding frame 4 in the length direction, and the sliding frame 4 is fixedly connected to the car seat through the two sliding frame connecting nuts 42.

[0029] In this embodiment, the aforementioned gear box fixing bracket 61 has a gear box fixing bracket bottom panel 611 and a pair of gear box fixing bracket side panels 612 formed on the front and rear sides of the gear box fixing bracket bottom panel 611, and two gear box fixing bracket connecting protrusions 613 are formed on the top portion of the pair of gear box fixing bracket side panels 612, and an inner slide rail positioning groove 23 is formed on the aforementioned inner slide rail 2 at a position corresponding to the gear box fixing bracket connecting protrusion 613, and the plurality of aforementioned gear box fixing bracket connecting protrusions 613 are all cooperated and installed in their respective corresponding inner slide rail positioning grooves 23, thereby realizing the positioning connection between the gear box fixing bracket 61 and the inner slide rail 2 body.

[0030] Furthermore, a locking bolt clearance groove 614 is provided at the bottom portion of the aforementioned gear box fixing bracket 61, and the nut of the locking bolt 131 installed on the aforementioned outer slide rail bottom panel 13 can pass through the locking bolt clearance groove 614 during the movement of the gear box fixing bracket 61.

[0031] Please continue to see Figure 2And focus on combining Figure 3 The outer slide rail 1 is a square tube structure with an opening facing upward. The outer slide rail 1 is also provided with outer slide rail side panels 14 formed on both sides of the outer slide rail bottom panel 13, and an outer slide rail bending portion 15 is formed at the top edge of the two outer slide rail side panels 14, and the cross section of the outer slide rail bending portion 15 is a "∩"-shaped structure with the opening facing downward, and an inner slide rail bending portion 24 is also formed at the left and right side edges in the length direction of the inner slide rail 2, and the cross section of the inner slide rail bending portion 24 is a "U"-shaped structure with the opening facing upward. The inner slide rail bending portions 24 on both sides of the inner slide rail 2 are respectively matched with their corresponding outer slide rail bending portions 15 to realize the sliding match between the inner slide rail 2 and the outer slide rail 1.

[0032] In the present embodiment, a dust strip assembly 7 is further provided on the upper part of the aforementioned outer slide rail 1, and the dust strip assembly 7 includes a pair of main dust strips 71, a pair of dust strip reinforcement frames 72 and a plurality of dust strip brackets 73; the two aforementioned dust strip reinforcement frames 72 are L-shaped plate structure and are respectively arranged on the corresponding outer slide rail bending parts 15, and a dust strip reinforcement frame support seat 721 is also provided at the lower position of the two end portions of the two dust strip reinforcement frames 72 in the length direction, and the aforementioned dust strip reinforcement frame support seat 721 is positioned and installed on the outer slide rail bottom panel 13 of the aforementioned outer slide rail 1, and the two aforementioned main dust strips 71 are respectively arranged on the two dust strips On the reinforcing frame 72, the two main dust strips 71 each include a horizontally arranged main dust strip transverse plate 711 and a main dust strip vertical plate 712 formed at the bottom of the main dust strip transverse plate 711, the main dust strip transverse plates 711 of the two main dust strips 71 are arranged on the upper part of the outer slide rail opening groove 12 and jointly cover the outer slide rail opening groove 12, and the plurality of aforementioned dust strip brackets 73 are installed at intervals on the outer slide rail side panels 14 on the left and right sides of the outer slide rail 1 and are arranged along the vertical direction, and the top end portion of the dust strip bracket 73 is connected to the respective corresponding main dust strips 71, thereby realizing the positioning and installation of the main dust strip 71 and the outer slide rail 1.

[0033] It should be noted that the dust strip assembly 7 has a compact structure and can achieve a reliable positioning connection with the outer slide rail 1. When the outer slide rail 1 is arranged in the vehicle body floor, it can effectively prevent dust and other foreign matter from entering the outer slide rail 1, and the main dust strip 71 can make the vehicle body floor a large plane structure, thereby increasing practicality and aesthetics.

[0034] Furthermore, a front screw support 31 and a rear screw support 32 are respectively arranged at the front and rear sides of the length direction of the aforementioned screw rod 3, and the front and rear ends of the screw rod 3 in the length direction are respectively inserted into the front screw support 31 and the rear screw support 32, and the front screw support 31 and the rear screw support 32 are fixedly mounted on the outer slide rail bottom panel 13 by a fastener; a screw guide sleeve 33 is also installed on the rod body of the aforementioned screw rod 3.

[0035] In this embodiment, the cross-section of the inner slide rail sliding support frame 21 on the front and rear sides of the aforementioned inner slide rail 2 is in a "convex" shape, and a rolling bearing 211 is pivotally connected to the two side panels on the bottom of the inner slide rail sliding support frame 21, and a bearing pin 212 is connected between the rolling bearing 211 and the side panel of the inner slide rail sliding frame 21. The aforementioned rolling bearing 211 is supported on the outer slide rail bottom panel 13 of the aforementioned outer slide rail 1 and can roll back and forth on it.

[0036] Furthermore, the aforementioned gap-eliminating component 22 is provided with a gap-eliminating support frame 221, a pair of oblique friction plates 222 and a pair of vertical friction plates 223, and the gap-eliminating support frame 221 is made of spring sheet material; the aforementioned gap-eliminating support frame 221 is provided with a gap-eliminating support frame top panel 2211, and the gap-eliminating support frame top panel 2211 is fittedly arranged on the downward side surface of the inner slide rail 2, and the gap-eliminating support frame top panel 2211 is fixed together with the aforementioned inner slide rail 2 by fasteners to realize the connection between the gap-eliminating support frame 221 and the inner slide rail 2, and a gap-eliminating support frame oblique side panel 2212 and a gap-eliminating support frame vertical side panel 2213 are respectively formed at the left and right sides of the bottom of the gap-eliminating support frame 221, and the aforementioned outer slide rail An outer slide rail oblique plate 16 is also formed between the outer slide rail side panel 14 and the outer slide rail bending portion 15, and the outer slide rail oblique plate 16 is arranged corresponding to the oblique side plate 2212 of the anti-backlash support frame; a pair of the aforementioned oblique friction plates 222 are respectively installed on the anti-backlash support frame oblique side plates 2212 on both sides of the aforementioned anti-backlash support frame 221 through fasteners, and the pair of oblique friction plates 222 are both in contact with the inner side walls of the aforementioned outer slide rail oblique plate 16, similarly, a pair of the aforementioned vertical friction plates 223 are respectively installed on the anti-backlash support frame vertical side plates 2213 on both sides of the aforementioned anti-backlash support frame 221 through fasteners, and the pair of vertical friction plates 223 are both in contact with the inner side walls of the outer slide rail side panel 14 body. The oblique friction plate 222 and the vertical friction plate 223 of the anti-backlash assembly 22 are always in contact with the inner wall of the outer slide rail 1 under the elastic action of the elastic anti-backlash support frame 221, thereby effectively ensuring that the gap between the outer slide rail 1 and the inner slide rail 2 is effectively eliminated, ensuring the smooth sliding of the inner slide rail 2.

[0037] See also Figures 1 to 3The applicant briefly describes the working principle of the technical solution provided by the present invention: First, during assembly, two corresponding outer slide rails 1 are fixedly installed on the vehicle body bottom plate through the locking bolts 131, and then the gear box 6 and the inner slide rail 2 with the anti-backlash assembly 22 are arranged in the outer slide rail 1, and then the screw rod 3 and the drive motor 5 are arranged to realize the transmission connection between the transmission shaft 51 and the gear box 6, and then the dust strip assembly 7 is installed, and finally the vehicle seat is placed on the sliding frame 4 and fixed by the sliding frame connecting nut 42. When the driver and passenger need to move the seat forward and backward according to the actual riding experience, the drive motor 5 is controlled by operating the external controller, and the drive shaft 51 of the drive motor 32 on the double-sided outer slide rails 1 drives the transmission gear assembly inside the gear box 6 to work, thereby driving the gear box 6 to move forward and backward on the screw rod 3, and the gear box fixed bracket slide 61 of the gear box 6 drives the inner slide rail 2 to move forward and backward, and finally drives the vehicle seat connected to the inner slide rail 2 to move forward and backward to achieve adjustment.

[0038] In summary, the technical solution provided by the present invention 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. A driving mechanism for an electric slide rail for a vehicle seat, the electric slide rail comprising a pair of outer slide rails (1), an inner slide rail (2) being slidably connected to the outer slide rails (1), an outer slide rail inner cavity (11) being formed inside the outer slide rails (1), and an outer slide rail opening groove (12) opening upwardly formed on the upper part of the outer slide rails (1), the outer slide rails (1) also having an outer slide rail bottom panel (13), the inner slide rail (2) being arranged at the top of the outer slide rail (1) and corresponding to the position of the outer slide rail opening groove (12), and an inner slide rail sliding support frame (21) and a clearance elimination component (22) capable of rolling on the outer slide rail bottom panel (13) are respectively arranged at the front and rear ends of the inner slide rails (2) in the longitudinal direction, and a screw rod (3) extending along the longitudinal direction thereof is fixedly installed in the outer slide rail inner cavity (11); the characteristics are as follows: The driving mechanism comprises a sliding frame (4) fixedly connected to the car seat, a driving motor (5) and a gear box (6); the sliding frame (4) is vertically arranged and mounted on the upper side surface of the inner slide rail (2); the driving motor (5) is mounted at the middle position of the sliding frame (4) in the length direction and is connected to a transmission shaft (51); the gear box (6) is horizontally arranged in the inner cavity (11) of the outer slide rail and penetrates the rod body of the screw rod (3); the gear box (6) is slidably connected to the screw rod (3) through the gear transmission assembly inside the gear box (6); a gear box fixing bracket (61) is also installed on the gear box (6); the gear box fixing bracket (61) is fixedly installed with the inner slide rail (2) to realize the connection between the gear box (6) and the inner slide rail (2); and the gear box fixing bracket (61) and the bottom panel (13) of the outer slide rail are connected. There is a distance; the gap elimination component (22) is provided with a gap elimination support frame (221); the gap elimination support frame (221) is provided with a gap elimination support frame top panel (2211), the gap elimination support frame top panel (2211) is arranged on a downward side surface of the inner slide rail (2), and the gap elimination support frame top panel (2211) is fixed to the inner slide rail (2) by fasteners, thereby realizing the gap elimination support frame (221) and the inner slide rail (2), a gap-eliminating support frame oblique side plate (2212) and a gap-eliminating support frame vertical side plate (2213) are respectively formed at the left and right sides of the bottom of the gap-eliminating support frame (221), and an outer slide rail oblique plate (16) is also formed between the outer slide rail side panel (14) and the outer slide rail bending portion (15) of the outer slide rail (1), and the outer slide rail oblique plate (16) is arranged corresponding to the gap-eliminating support frame oblique side plate (2212).

2. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: A transmission shaft cover plate (41) is fixedly mounted on a side surface of the sliding frame plate (4) and at a position corresponding to the bottom of the driving motor (5). A transmission shaft positioning protective sleeve (411) is also protruded from the middle of the transmission shaft cover plate (41), and the transmission shaft (51) of the driving motor (5) is sleeved in the transmission shaft positioning protective sleeve (411).

3. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: A sliding frame connecting nut (42) is installed on the top of both end portions of the sliding frame (4) in the length direction, and the sliding frame (4) is fixedly connected to the car seat via the two sliding frame connecting nuts (42).

4. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: The gearbox fixing bracket (61) comprises a gearbox fixing bracket bottom panel (611) and a pair of gearbox fixing bracket side panels (612) formed on the front and rear sides of the gearbox fixing bracket bottom panel (611), and two gearbox fixing bracket connecting protrusions (613) are formed at the top of the pair of gearbox fixing bracket side panels (612), and an inner slide rail positioning groove (23) is formed on the inner slide rail (2) at a position corresponding to the gearbox fixing bracket connecting protrusion (613), and a plurality of the gearbox fixing bracket connecting protrusions (613) are all fitted and installed in the corresponding inner slide rail positioning grooves (23), thereby realizing the positioning connection between the gearbox fixing bracket (61) and the inner slide rail (2) body.

5. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: A locking bolt clearance groove (614) is also provided at the bottom of the gear box fixing bracket (61), and the nut of the locking bolt (131) installed on the outer slide rail bottom panel (13) can pass through the locking bolt clearance groove (614) during the movement of the gear box fixing bracket (61).

6. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: The outer slide rail (1) is a square tube structure and the opening of the outer slide rail (1) is upward. The outer slide rail (1) also has outer slide rail side panels (14) formed on both sides of the outer slide rail bottom panel (13), and an outer slide rail bending portion (15) is formed at the top edge of the two outer slide rail side panels (14). The cross section of the outer slide rail bending portion (15) is a "∩"-shaped structure with the opening facing downward. The left and right side edges of the inner slide rail (2) in the length direction are also formed with an inner slide rail bending portion (24). The cross section of the inner slide rail bending portion (24) is a "U"-shaped structure with the opening facing upward. The inner slide rail bending portions (24) on both sides of the inner slide rail (2) are respectively matched with the corresponding outer slide rail bending portions (15) to achieve sliding matching between the inner slide rail (2) and the outer slide rail (1).

7. The driving mechanism of the electric slide rail for a vehicle seat according to claim 6, characterized in that: A dust strip assembly (7) is also provided on the upper part of the outer slide rail (1), and the dust strip assembly (7) includes a pair of main dust strips (71), a pair of dust strip reinforcement frames (72) and a plurality of dust strip brackets (73); the two dust strip reinforcement frames (72) are L-shaped plate structures and are respectively arranged on the corresponding outer slide rail bending parts (15), and a dust strip reinforcement frame support seat (721) is also provided at the lower position of the two end portions of the two dust strip reinforcement frames (72) in the length direction, and the dust strip reinforcement frame support seat (721) is positioned and installed on the outer slide rail bottom panel (13) of the outer slide rail (1), and the two main dust strips (71) are respectively arranged on the two dust strip reinforcement frames (72 ), and the two main dust-proof strips (71) each include a horizontally arranged main dust-proof strip transverse plate (711) and a main dust-proof strip vertical plate (712) formed at the bottom of the main dust-proof strip transverse plate (711), the main dust-proof strip transverse plates (711) of the two main dust-proof strips (71) are arranged on the upper part of the outer slide rail opening groove (12) and together cover the outer slide rail opening groove (12), and the plurality of dust-proof strip brackets (73) are installed at intervals on the outer slide rail side panels (14) on the left and right sides of the outer slide rail (1) and are arranged along the vertical direction, and the top end of the dust-proof strip brackets (73) are connected to the respective corresponding main dust-proof strips (71), thereby realizing the positioning and installation of the main dust-proof strip (71) and the outer slide rail (1).

8. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: A front screw support (31) and a rear screw support (32) are respectively arranged at the front and rear sides of the screw rod (3) in the length direction, and the front and rear ends of the screw rod (3) in the length direction are respectively inserted into the front screw support (31) and the rear screw support (32), and the front screw support (31) and the rear screw support (32) are both fixedly mounted on the outer slide rail bottom panel (13) by a fastener; a screw guide sleeve (33) is also installed on the rod body of the screw rod (3).

9. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: The cross-section of the inner slide rail sliding support frame (21) on the front and rear sides of the inner slide rail (2) is in a "convex" shape, and a rolling bearing (211) is pivotally connected to the two side plates at the bottom of the inner slide rail sliding support frame (21), and a bearing pin (212) is connected between the rolling bearing (211) and the side plate of the inner slide rail sliding frame (21), and the rolling bearing (211) is supported on the outer slide rail bottom plate (13) of the outer slide rail (1) and can roll back and forth on it.

10. The driving mechanism of the electric slide rail for a vehicle seat according to claim 1, characterized in that: The anti-backlash component (22) also includes a pair of oblique friction plates (222) and a pair of vertical friction plates (223); the pair of oblique friction plates (222) are respectively mounted on the anti-backlash support frame oblique side plates (2212) on both sides of the anti-backlash support frame (221) through fasteners, and the pair of oblique friction plates (222) are both in contact with the inner side walls of the outer slide rail oblique plate (16); similarly, the pair of vertical friction plates (223) are respectively mounted on the anti-backlash support frame vertical side plates (2213) on both sides of the anti-backlash support frame (221) through fasteners. ), and the pair of vertical friction plates (223) are in contact with the inner side walls of the outer slide rail side panel (14) body; and a plurality of locking bolts (131) are also provided on the outer slide rail bottom panel (13) of the outer slide rail (1), and the gear box fixing bracket (61) can reciprocate at the position above the plurality of locking bolts (131), and the transmission shaft (51) of the drive motor (5) is extended downward and passes through the inner slide rail (2) and penetrates into the inner cavity (11) of the outer slide rail to realize transmission connection with the transmission component inside the gear box (6).

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