A slide rail of an automotive seat

Abstract

The present invention belongs to the technical field of automobile parts, and specifically relates to a slide rail for an automobile seat; it comprises a drive assembly, an unlocking assembly, a wiring harness box assembly, a rack, an upper rail assembly assembly, a lower rail assembly assembly, and a lock pin assembly; wherein the upper rail assembly assembly is cooperatively connected in the lower rail assembly assembly and can slide along the lower rail assembly assembly, a rack is fixed to the inner wall of the lower rail assembly assembly, and a lower rail window is provided on the lower rail assembly assembly; the present invention can meet the slide rail strength requirements of the entire vehicle, realize reliable locking, and parameters such as the slide rail clearance value meet the requirements of most vehicle models.

Description

Technical Field

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

[0002] Car seats provide fore-and-aft adjustment functions through slide rails. The fore-and-aft adjustment travel targets are getting longer and longer as users require them. In addition, in scenarios where long slide rails are used, the upper seat belt fixing points of the seats are generally arranged on the seats, and the requirements for the strength of the slide rails are also greatly increased. Traditional electric slide rails are difficult to meet the requirements. There are already several solutions for electric long slide rails in the industry, but there are some problems. For example, in patent CN202010407441.9, a rack component is connected to the slide rail, which is prone to falling impurities and causing wear. In patent CN202110559409.7, two screw rods are arranged in the slide rail, which has problems such as occupying a large space and high cost. Summary of the Invention

[0003] In order to overcome the above problems, the present invention provides a slide rail for a car seat, which is suitable for all models with a long slide rail stroke and electronic control adjustment requirements. It can meet the slide rail strength requirements of the entire vehicle while achieving an ultra-long sliding stroke, realize reliable locking, and parameters such as the slide rail clearance value meet the requirements of most models.

[0004] A slide rail for a car seat, comprising a drive assembly 1, an unlocking assembly 2, a wiring harness box assembly 3, a rack 4, an upper rail assembly assembly 5, a lower rail assembly assembly 6, and a lock pin assembly 7;

[0005] The upper rail assembly assembly 5 is connected to the lower rail assembly assembly 6 and can slide along the lower rail assembly assembly 6. A rack 4 is fixed to the inner wall of the lower rail assembly assembly 6, and a lower rail window 61 is provided on the lower rail assembly assembly 6.

[0006] The drive assembly 1 includes a drive motor bracket 11, a dual-axis drive motor 12, a drive reducer 13 and a transmission mechanism, wherein the dual-axis drive motor 12 is fixed between the two upper rail assembly assemblies 5 through the drive motor bracket 11, and the two ends of the drive shaft of the dual-axis drive motor 12 are respectively connected to the corresponding transmission mechanism through the drive reducer 13 fixed at both ends of the drive motor bracket 11, so as to drive the transmission mechanism to rotate; and the transmission mechanism is meshed with the rack 4 in the corresponding lower rail assembly 6;

[0007] The unlocking assembly 2 includes an unlocking motor 21, an unlocking motor bracket 22, a synchronization rod 23, an unlocking piece 24, an unlocking pressure piece 25, a rotating shaft 26, a second torsion spring 27, an unlocking pressure piece bracket 28 and an unlocking return coil spring 29, wherein the unlocking motor bracket 22 is fixed between the two upper rail assembly assemblies 5, the unlocking motor 21 is fixed on the unlocking motor bracket 22, and its drive shaft is connected to the middle of the synchronization rod 23, which can drive the synchronization rod 23 to rotate, and the two ends of the synchronization rod 23 are respectively installed by the unlocking return coil spring 29 and the synchronization rod sleeve 230 In the door-shaped frames at both ends of the unlocking motor bracket 22, an unlocking piece 24 is fixed to the outer end of the synchronization rod sleeve 230, and an unlocking swing pin 231 is fixed to the outer side of the unlocking piece 24; the unlocking pressing piece bracket 28 is fixed to the side of the upper rail assembly assembly 5, and the unlocking pressing piece 25 is connected to the unlocking pressing piece bracket 28 through the rotating shaft 26, and the outer side of the rotating shaft 26 is sleeved with a second torsion spring 27, one end of the second torsion spring 27 is placed on the unlocking pressing piece bracket 28, and the other end is placed on the bottom of the unlocking pressing piece 25, and the unlocking swing pin 231 is located below one end of the unlocking pressing piece 25;

[0008] When the cam 72 is in the unlock state, the locking pin 73 is locked and the locking pin 73 is in the unlock state.

[0009] The wiring harness box assembly 3 includes a wiring harness drag chain 31, a wiring harness box cover 32, a drag chain fixing bracket 33, a wiring harness box 34 and an upper rail fixing bracket 35, wherein the front and rear ends of the wiring harness box 34 are fixed to the bottom of the lower rail 62 by the wiring harness box front bracket 36 and the wiring harness box rear bracket 37 respectively, the wiring harness drag chain 31 is fitted in the wiring harness box 34, and one end thereof is fixed on the wiring harness box 34, and the other end is located outside the wiring harness box 34 and fixed on the drag chain fixing bracket 33, the drag chain fixing bracket 33 is fixed to the inner side of the upper rail 51 of the upper rail assembly assembly 5 through the upper rail fixing bracket 35, and the wiring harness box cover 32 is fitted and connected to the wiring harness box 34.

[0010] The wiring harness box upper cover 32 is provided with a square hole 321 , and the wiring harness box 34 is provided with an undercut 341 , wherein the wiring harness box 34 is snapped into the square hole 321 through the undercut 341 , thereby fixing the wiring harness box upper cover 32 and the wiring harness box 34 .

[0011] The upper rail assembly assembly 5 includes an upper rail 51, an upper bearing 125, an upper bearing rotating bracket 120, an upper bearing fixing bracket 121, an anti-backlash tension spring 122 and a lower bearing 123, wherein the upper bearing fixing bracket 121 is fixed to the bottom side of the upper rail 51, the upper bearing 125 is connected to the upper bearing fixing bracket 121 through the upper bearing rotating bracket 120, the lower bearing 123 is fixed to the upper bearing fixing bracket 121 outside the upper bearing 125, one end of the anti-backlash tension spring 122 is hooked on the upper bearing rotating bracket 120, and the other end is hooked in the notch provided on the upper bearing fixing bracket 121; the upper rail assembly assembly 5 is connected to the lower rail assembly assembly 6 through the upper bearing 125 and the lower bearing 123, and the upper bearing 125 is fitted with the inclined surface in the lower rail assembly assembly 6.

[0012] The dual-axis drive motor 12 is fixed on the drive motor bracket 11 , and both ends of the drive motor bracket 11 are fixed to the front and rear upper rails 51 through connecting plates.

[0013] The lower rail assembly assembly 6 includes a lower rail 62, a slide rail cover 63 and a slide rail end cover 64, wherein the slide rail cover 63 is provided with a slide rail end cover 64 at both ends, a groove is provided in the middle of the slide rail cover 63, and a slide rail cover soft edge is provided in the groove. The slide rail cover 63 is fixed on the lower rail 62 so that the groove on the slide rail cover 63 is aligned with the track of the lower rail 62, and a lower rail window 61 is provided on the lower rail 62; the upper rail 51 passes through the soft edge of the slide rail cover and extends into the lower rail 62, so that the upper bearing 125 and the lower bearing 123 are fitted and connected in the track of the lower rail 62, and the upper bearing 125 fits with the inclined surface on the inner side of the track of the lower rail 62.

[0014] The transmission mechanism includes a main transmission shaft 14, a slave transmission shaft 15, a driving gear 16, a driven gear 17, a gear bracket 18 and a shaft bracket 19, wherein the gear bracket 18 is arranged in the opening of the upper rail assembly 5, the bottom of the driving gear 16 and the driven gear 17 are respectively connected to the gear bracket 18 through a rotating shaft, and the two are meshed and connected, the driving gear 16 is sleeved with the main transmission shaft 14, the driven gear 17 is sleeved with the slave transmission shaft 15, and the main transmission shaft 14 and the slave transmission shaft 15 are connected to the opening of the upper rail assembly 5 through the shaft bracket 19. Inside the mouth, the two ends of the driving shaft of the dual-axis drive motor 12 are respectively connected to the corresponding main transmission shaft 14 through the driving reducer 13 fixed at both ends of the driving motor bracket 11, which can drive the main transmission shaft 14 to rotate; the driving gear 16 and the driven gear 17 extend into the lower rail assembly assembly 6 along with the upper rail assembly assembly 5, and the driven gear 17 is meshed with the rack 4 in the corresponding lower rail assembly assembly 6. A first torsion spring 124 is sleeved on the bottom of the main transmission shaft 14, and one end of the first torsion spring 124 is placed on the upper rail assembly assembly 5, and the other end is placed on the slave transmission shaft 15.

[0015] The transmission mechanism further includes a disc, which is sleeved outside the transmission shaft 15 and aligned with the upper end plane of the rack 4.

[0016] Synchronous rod sleeves 230 are respectively sleeved on the outer sides of both ends of the synchronous rod 23 , and the synchronous rod sleeves 230 are connected to the door frame of the unlocking motor bracket 22 through the unlocking return coil spring 29 .

[0017] Beneficial effects of the present invention:

[0018] The present invention can meet the requirements of the entire vehicle for the slide rail strength, achieve reliable locking, and parameters such as the slide rail clearance value meet the requirements of most vehicle models.

[0019] The present invention has a disc-shaped structure above the driven gear, which is in close contact with the vertical long plane above the rack, playing a limiting role to prevent the gear and rack from being too tightly engaged; this double-gear structure ensures the reliability and accuracy of the engagement between the gear and the rack.

[0020] The present invention has a gap elimination structure, the upper bearing is fixed to the upper bearing rotating bracket, and this assembly is hinged to the upper bearing fixing bracket and can rotate around the upper bearing fixing bracket. Under the action of the gap elimination tension spring, the upper bearing remains in close contact with the lower rail inclined surface, thereby eliminating the gap between the upper rail and the lower rail.

[0021] The present invention has a wiring harness box assembly, the vehicle body wiring harness passes through the drag chain, one end of the drag chain is fixed to the drag chain box, and the other end is fixed to the drag chain fixing bracket, and is fixedly connected to the upper rail through the upper rail fixing bracket. When the upper rail moves back and forth, the drag chain fixing bracket is driven to translate, the fixed end of the drag chain remains stationary, and the whole body translates, and the wiring harness inside the drag chain is synchronously bent and moved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the drive assembly structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the transmission mechanism structure of the present invention.

[0026] Figure 4 for Figure 3 A magnified schematic diagram of part of the structure.

[0027] Figure 5 It is a schematic diagram of the unlocking assembly structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the overall decomposition structure of the unlocking method of the present invention.

[0029] Figure 7 It is a schematic structural diagram of the upper rail assembly assembly of the present invention.

[0030] Figure 8 It is a structural schematic diagram of the upper rail assembly assembly of the present invention.

[0031] Figure 9 It is a schematic structural diagram of the lock pin assembly of the present invention.

[0032] Figure 10 Schematic diagram of the lower rail window on the lower rail of the present invention.

[0033] Figure 11 It is a schematic structural diagram of the unlocking assembly part of the present invention.

[0034] Figure 12 This is a side view of the upper rail and lower rail of the present invention.

[0035] Figure 13 This is a side view of the upper rail, lower rail and unlocking assembly of the present invention.

[0036] Figure 14 It is a side view of the unlocking assembly of the present invention in the locked state.

[0037] Figure 15 It is a side view of the unlocking assembly of the present invention in the unlocked state.

[0038] Figure 16 It is a schematic structural diagram of the wiring harness box assembly of the present invention.

[0039] Figure 17 It is a schematic structural diagram of the wiring harness box assembly of the present invention.

[0040] Figure 18 It is a structural schematic diagram of the installation part of the wiring harness box assembly of the present invention.

[0041] Figure 19 It is a structural schematic diagram of the lower rail assembly assembly of the present invention. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0043] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0044] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0045] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0046] like Figure 1 As shown, a slide rail for a car seat includes a drive assembly 1, an unlocking assembly 2, a wiring harness box assembly 3, a rack 4, an upper rail assembly assembly 5, a lower rail assembly assembly 6, and a lock pin assembly 7;

[0047] The bottom of the upper rail assembly assembly 5 is connected to the lower rail assembly assembly 6 and can slide along the lower rail assembly assembly 6. The rack 4 is fixed to the inner wall of the lower rail assembly assembly 6, and a lower rail window 61 is provided on the lower rail assembly assembly 6.

[0048] like Figure 2As shown, the drive assembly 1 includes a drive motor bracket 11, a dual-axis drive motor 12, a drive reducer 13 and a transmission mechanism, wherein the dual-axis drive motor 12 is fixed between the two upper rail assembly assemblies 5 through the drive motor bracket 11, and the two ends of the drive shaft of the dual-axis drive motor 12 are respectively connected to the corresponding transmission mechanism through the drive reducer 13 fixed at the two ends of the drive motor bracket 11, so as to drive the transmission mechanism to rotate; and the transmission mechanism is meshed and connected with the rack 4 in the corresponding lower rail assembly assembly 6;

[0049] like Figure 5 、 Figure 6 ,like Figure 7 、 Figure 10 and Figure 11 As shown, the unlocking assembly 2 includes an unlocking motor 21, an unlocking motor bracket 22, a synchronization rod 23, an unlocking piece 24, an unlocking pressure piece 25, a rotating shaft 26, a second torsion spring 27, an unlocking pressure piece bracket 28 and an unlocking return coil spring 29, wherein the two ends of the unlocking motor bracket 22 are respectively fixed between the two upper rail assembly assemblies 5 through a connecting plate and are located on the rear side of the drive assembly 1, the unlocking motor 21 is fixed on the unlocking motor bracket 22, and its drive shaft is connected to the middle of the synchronization rod 23, which can drive the synchronization rod 23 to rotate, and the two ends of the synchronization rod 23 are respectively fixed by the unlocking return coil spring 2 9 and the synchronization rod sleeve 230 are installed in the door-shaped frames at both ends of the unlocking motor bracket 22, and the outer end of the synchronization rod sleeve 230 is fixed with an unlocking piece 24, and the outer side of the unlocking piece 24 is fixed with an unlocking swing pin 231; the unlocking pressing piece bracket 28 is fixed to the side of the upper rail assembly assembly 5, the unlocking pressing piece 25 is connected to the unlocking pressing piece bracket 28 through the rotating shaft 26, and the outer side of the rotating shaft 26 is sleeved with a second torsion spring 27, one end of the second torsion spring 27 is placed on the unlocking pressing piece bracket 28, and the other end is placed on the bottom of the unlocking pressing piece 25, and the unlocking swing pin 231 is located below one end of the unlocking pressing piece 25;

[0050] like Figure 9 When the cam 72 is in the unlock state, the cam 72 is in the unlock state, and the cam 72 is in the unlock state. As shown in FIG, the lock pin assembly 7 includes a lock pin bracket 71, a lock pin shaft 72, a lock pin 73, a compression spring 74 and a lock pin pressure cap 75, wherein the lock pin bracket 71 is welded to the side of the upper rail assembly assembly 5 below the unlocking pressure piece 25, and a plurality of lock pin shafts 72 are sleeved in the lock pin bracket 71, and a compression spring 74 is sleeved on the lock pin shaft 72 between the lock pin bracket 71 and the lock pin shaft 72, a lock pin 73 is fixed to the bottom of the lock pin shaft 72, and a lock pin pressure cap 75 is fixed to the top, and the lock pin 73 is fitted and connected in the lower rail window 61 of the lower rail assembly assembly 6, and the lock pin pressure cap 75 is located below the unlocking pressure piece 25;

[0051] like Figure 16-18As shown, the wiring harness box assembly 3 includes a wiring harness drag chain 31, a wiring harness box cover 32, a drag chain fixing bracket 33, a wiring harness box 34 and an upper rail fixing bracket 35, wherein the front and rear ends of the wiring harness box 34 are fixed to the bottom of the lower rail 62 by the wiring harness box front bracket 36 and the wiring harness box rear bracket 37 respectively, the wiring harness drag chain 31 is fitted in the wiring harness box 34, and one end thereof is fixed on the wiring harness box 34, and the other end is located outside the wiring harness box 34 and fixed on the drag chain fixing bracket 33, the drag chain fixing bracket 33 is fixed to the inner side of the upper rail 51 of the upper rail assembly assembly 5 through the upper rail fixing bracket 35, and the wiring harness box cover 32 is fitted and connected to the wiring harness box 34.

[0052] The wiring harness box upper cover 32 is provided with a square hole 321 , and the wiring harness box 34 is provided with an undercut 341 , wherein the wiring harness box 34 is snapped into the square hole 321 through the undercut 341 , thereby fixing the wiring harness box upper cover 32 and the wiring harness box 34 .

[0053] like Figure 8 As shown, the upper rail assembly assembly 5 includes an upper rail 51, an upper bearing 125, an upper bearing rotating bracket 120, an upper bearing fixing bracket 121, an anti-backlash tension spring 122 and a lower bearing 123, wherein the upper bearing fixing bracket 121 is fixed to the bottom side of the upper rail 51, the upper bearing 125 is connected to the upper bearing fixing bracket 121 through the upper bearing rotating bracket 120, the lower bearing 123 is fixed to the upper bearing fixing bracket 121 outside the upper bearing 125, one end of the anti-backlash tension spring 122 is hooked on the upper bearing rotating bracket 120, and the other end is hooked in the notch provided on the upper bearing fixing bracket 121; the upper rail assembly assembly 5 is connected to the lower rail assembly assembly 6 through the upper bearing 125 and the lower bearing 123, and the upper bearing 125 is fitted with the inclined surface in the lower rail assembly assembly 6.

[0054] The dual-axis drive motor 12 is fixed on the drive motor bracket 11 , and both ends of the drive motor bracket 11 are fixed to the front and rear upper rails 51 through connecting plates.

[0055] like Figure 12 、 13 As shown in Figure 19, the lower rail assembly assembly 6 includes a lower rail 62, a slide rail cover 63 and a slide rail end cover 64, wherein the slide rail cover 63 is provided with a slide rail end cover 64 at both ends, a groove is provided in the middle of the slide rail cover 63, and a slide rail cover soft edge is provided in the groove. The slide rail cover 63 is fixed on the lower rail 62 so that the groove on the slide rail cover 63 is aligned with the track of the lower rail 62, and a lower rail window 61 is provided on the lower rail 62; the upper rail 51 passes through the soft edge of the slide rail cover and extends into the lower rail 62, so that the upper bearing 125 and the lower bearing 123 are fitted and connected in the track of the lower rail 62, and the upper bearing 125 fits with the inclined surface on the inner side of the track of the lower rail 62.

[0056] like Figure 3-4As shown, the transmission mechanism includes a main transmission shaft 14, a slave transmission shaft 15, a driving gear 16, a driven gear 17, a gear bracket 18 and a shaft bracket 19, wherein the gear bracket 18 is arranged in the opening of the upper rail assembly 5, and the bottoms of the driving gear 16 and the driven gear 17 are respectively connected to the gear bracket 18 through a rotating shaft, and the two are meshed and connected, the driving gear 16 is sleeved with the main transmission shaft 14, and the driven gear 17 is sleeved with the slave transmission shaft 15. The upper parts of the main transmission shaft 14 and the slave transmission shaft 15 are connected to the opening of the upper rail assembly 5 through the shaft bracket 19, and the two drive shafts of the dual-axis drive motor 12 are connected to the upper rail assembly 5. The ends are connected to the corresponding main transmission shaft 14 through the driving reducers 13 fixed at both ends of the driving motor bracket 11, which can drive the main transmission shaft 14 to rotate; the driving gear 16 and the driven gear 17 extend into the lower rail assembly assembly 6 along with the upper rail assembly assembly 5, and the driven gear 17 is meshed with the rack 4 in the corresponding lower rail assembly assembly 6. A first torsion spring 124 is sleeved on the bottom of the main transmission shaft 14, and one end of the first torsion spring 124 is placed on the upper rail assembly assembly 5, and the other end is placed on the transmission shaft 15. Under the action of the torsion spring force of the first torsion spring 124, the driven gear 17 is kept in a meshing state with the rack 4

[0057] The transmission mechanism also includes a disc, which is mounted on the outside of the driven transmission shaft 15 and aligned with the upper surface of the rack 4. (This disc can be considered a limiting wheel, which rotates around the driven transmission shaft 15. The disc is tangent to the upper surface of the rack 4, i.e., the rack limiting surface, to prevent the driven gear 17 from getting too close to the rack 4 under the action of the first torsion spring 124.)

[0058] Synchronous rod sleeves 230 are respectively sleeved on the outer sides of both ends of the synchronous rod 23 , and the synchronous rod sleeves 230 are connected to the door frame of the unlocking motor bracket 22 through the unlocking return coil spring 29 .

[0059] like Figure 14 and Figure 15 As shown, when in use, the unlocking action is performed first, that is, the unlocking motor 21 rotates to one side, driving the synchronization rod 23, the synchronization rod sleeve 230 and the unlocking piece 24 to rotate synchronously, and then driving the unlocking swing pin 231 to rotate. The unlocking swing pin 231 lifts one side of the unlocking pressure piece 25 upward, and the other side of the unlocking pressure piece 25 located in the upper rail assembly 5 is pressed down, thereby driving the lock pin pressure cap 75, the lock pin shaft 72 and the lock pin 73 to move downward, so that the lock pin 73 moves to disengage from the lower rail window 61, and the unlocking function is achieved. The main transmission shaft 14 is driven by the dual-axis drive motor 12, and then under the action of the driven gear 17 and the rack 4, the upper rail 51 slides back and forth along the lower rail 62.

[0060] (1) The main components of the present invention include a drive assembly 1, an unlocking assembly 2, a wiring harness box assembly 3 and an upper rail and lower rail assembly assembly.

[0061] (2) The drive assembly 1 consists of a drive motor bracket 11, a dual-axis drive motor 12, and two drive reducers 13. The two sides of the dual-axis drive motor 12 are connected to the two drive reducers 13 through the drive motor transmission shaft. The drive reducer 13 consists of an upper cover, a lower cover, and a worm gear. The upper and lower covers are connected by bolts. The bearings serve as a rotation support for the worm gear, and the end cover serves as an end fixing. Through the center of the worm gear, it rotates synchronously with the main drive shaft 14 of the transmission mechanism. The driven gear 17 is driven by the driving gear 16 and cooperates with the rack 4 to play a transmission role.

[0062] (3) The driving gear 16 and the driven gear 17 are fixed to the main transmission shaft 14 and the driven transmission shaft 15 respectively, and the two shafts are connected by a shaft bracket 19. The position of the driving gear 16 is fixed by the worm gear in the reduction box above the main transmission shaft 14 and the gear bracket 18 below. The driven gear 17 has a torsional force that is close to the rack 4 through the action of the first torsion spring 124. In order to ensure the meshing of the gear and the rack, there is a disc-shaped structure above the driven gear 17. This disc is in close contact with the vertical long plane above the rack 4, which acts as a limiter to prevent the gear and rack from meshing too tightly. This dual gear structure ensures the reliability and accuracy of the meshing of the gear and the rack.

[0063] (4) The present invention has an unlocking assembly 2. When unlocking, the unlocking motor 21 fixed on the unlocking motor bracket 11 rotates in the unlocking direction, driving the synchronization rod 23 to rotate, and then driving the unlocking pressure piece 25 to rotate. One side of the unlocking pressure piece 25 is lifted, and the unlocking pressure piece 25 moves around the rotating shaft 26. The other side of the unlocking pressure piece 25 is pressed down, and the lock pin pressure cap 75, the lock pin shaft 72 and the lock pin 73 are pressed down. The lock pin 73 is separated from the lower rail window 61, and the upper rail 51 can move forward and backward. When locking, the system cuts off the power to the unlocking motor 21. Under the joint action of the unlocking return coil spring 29, the second torsion spring 27 and the compression spring 74, the unlocking pressure piece 25, the unlocking piece 24 and the lock pin 73 all return to their initial positions, and the lock pin fits with the lower rail window 61 of 73 and is locked.

[0064] (5) The present invention has a gap elimination structure. The upper bearing 125 is fixed on the upper bearing rotating bracket 120. This assembly is hinged to the upper bearing fixing bracket 121 and can rotate around this upper bearing fixing bracket 121. Under the action of the gap elimination tension spring 122, the upper bearing 125 remains in close contact with the lower rail inclined surface, thereby eliminating the gap between the upper rail 51 and the lower rail 62.

[0065] (6) The present invention has a wiring harness box assembly 3, the vehicle body wiring harness passes through the wiring harness drag chain 31, one end of the wiring harness drag chain 31 is fixed to the wiring harness box 34, and the other end is fixed to the drag chain fixing bracket 33, and is fixedly connected to the upper rail 51 through the upper rail fixing bracket 35. When the upper rail 51 moves back and forth, it drives the drag chain fixing bracket 33 to move horizontally, and the fixed end of the wiring harness drag chain 31 remains stationary and moves horizontally as a whole, and the wiring harness inside the wiring harness drag chain 31 is synchronously bent and moved.

[0066] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention. These simple variations all fall within the scope of protection of the present invention.

[0067] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0068] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A slide rail for a car seat, characterized in that: It includes a drive assembly (1), an unlocking assembly (2), a wiring harness box assembly (3), a rack (4), an upper rail assembly assembly (5), a lower rail assembly assembly (6), and a lock pin assembly (7); The upper rail assembly assembly (5) is connected in cooperation with the lower rail assembly assembly (6) and can slide along the lower rail assembly assembly (6). A rack (4) is fixed on the inner wall of the lower rail assembly assembly (6), and a lower rail window (61) is provided on the lower rail assembly assembly (6). The driving assembly (1) comprises a driving motor bracket (11), a dual-axis driving motor (12), a driving reducer (13) and a transmission mechanism, wherein the dual-axis driving motor (12) is fixed between the two upper rail assembly assemblies (5) via the driving motor bracket (11), and the two ends of the driving shaft of the dual-axis driving motor (12) are connected to the corresponding transmission mechanism via the driving reducer (13) fixed to the two ends of the driving motor bracket (11), so as to drive the transmission mechanism to rotate; and the transmission mechanism is meshed and connected with the rack (4) in the corresponding lower rail assembly assembly (6); The unlocking assembly (2) comprises an unlocking motor (21), an unlocking motor bracket (22), a synchronization rod (23), an unlocking plate (24), an unlocking pressing plate (25), a rotating shaft (26), a second torsion spring (27), an unlocking pressing plate bracket (28) and an unlocking return coil spring (29), wherein the unlocking motor bracket (22) is fixed between the two upper rail assembly assemblies (5), the unlocking motor (21) is fixed on the unlocking motor bracket (22), and its driving shaft is connected to the middle of the synchronization rod (23) to drive the synchronization rod (23) to rotate, and the two ends of the synchronization rod (23) are respectively connected by the unlocking return coil spring (29) and the synchronization rod sleeve (230). The unlocking plate (24) is fixed to the outer end of the synchronous rod sleeve (230), and the unlocking plate (24) is fixed to the outer side of the unlocking plate (24). The unlocking plate (24) is fixed to the outer side of the unlocking plate (24); the unlocking plate (25) is connected to the unlocking plate bracket (28) through the rotating shaft (26), and the second torsion spring (27) is sleeved on the outer side of the rotating shaft (26); one end of the second torsion spring (27) is placed on the unlocking plate bracket (28), and the other end is placed on the bottom of the unlocking plate (25), and the unlocking pin (231) is located below one end of the unlocking plate (25); The lock pin assembly (7) comprises a lock pin bracket (71), a lock pin shaft (72), a lock pin (73), a compression spring (74) and a lock pin pressure cap (75), wherein the lock pin bracket (71) is welded to the side of the upper rail assembly assembly (5) below the unlocking pressure piece (25), a plurality of lock pin shafts (72) are sleeved in the lock pin bracket (71), and a compression spring (74) is sleeved on the lock pin shaft (72) between the lock pin bracket (71) and the lock pin shaft (72), a lock pin (73) is fixed at the bottom of the lock pin shaft (72), and a lock pin pressure cap (75) is fixed at the top, and the lock pin (73) is connected in cooperation with the lower rail window (61) of the lower rail assembly assembly (6), and the lock pin pressure cap (75) is located below the unlocking pressure piece (25); The wiring harness box assembly (3) comprises a wiring harness drag chain (31), a wiring harness box upper cover (32), a drag chain fixing bracket (33), a wiring harness box (34) and an upper rail fixing bracket (35), wherein the front and rear ends of the wiring harness box (34) are fixed to the bottom of the lower rail (62) through the wiring harness box front bracket (36) and the wiring harness box rear bracket (37), respectively; the wiring harness drag chain (31) is fitted in the wiring harness box (34), and one end thereof is fixed to the wiring harness box (34), and the other end is located outside the wiring harness box (34) and fixed to the drag chain fixing bracket (33); the drag chain fixing bracket (33) is fixed to the inner side of the upper rail (51) of the upper rail assembly assembly (5) through the upper rail fixing bracket (35); the wiring harness box upper cover (32) is fitted and connected to the wiring harness box (34); The transmission mechanism comprises a main transmission shaft (14), a slave transmission shaft (15), a driving gear (16), a driven gear (17), a gear bracket (18) and a shaft bracket (19), wherein the gear bracket (18) is arranged in an opening of the upper rail assembly assembly (5), the bottoms of the driving gear (16) and the driven gear (17) are respectively connected to the gear bracket (18) through a rotating shaft, and the two are meshed and connected, the driving gear (16) is sleeved with the main transmission shaft (14), and the driven gear (17) is sleeved with the slave transmission shaft (15), and the upper parts of the main transmission shaft (14) and the slave transmission shaft (15) are connected to the upper rail assembly assembly (5) through the shaft bracket (19). In the opening, both ends of the driving shaft of the dual-axis driving motor (12) are connected to the corresponding main transmission shaft (14) through the driving reducer (13) fixed at both ends of the driving motor bracket (11), and can drive the main transmission shaft (14) to rotate; the driving gear (16) and the driven gear (17) extend into the lower rail assembly assembly (6) along with the upper rail assembly assembly (5), and the driven gear (17) is meshed and connected with the rack (4) in the corresponding lower rail assembly assembly (6); the bottom of the main transmission shaft (14) is sleeved with a first torsion spring (124), and one end of the first torsion spring (124) is placed on the upper rail assembly assembly (5), and the other end is placed on the transmission shaft (15); The transmission mechanism also includes a disc, which is sleeved outside the transmission shaft (15) and aligned with the upper end plane of the rack (4); Synchronous rod sleeves (230) are respectively sleeved on the outside of both ends of the synchronous rod (23), and the synchronous rod sleeves (230) are connected to the door frame of the unlocking motor bracket (22) through the unlocking return coil spring (29).

2. The slide rail of a car seat according to claim 1, characterized in that: The wiring harness box upper cover (32) is provided with a square hole (321), and the wiring harness box (34) is provided with an undercut (341), wherein the wiring harness box (34) is snapped into the square hole (321) through the undercut (341), thereby achieving fixation of the wiring harness box upper cover (32) and the wiring harness box (34).

3. The slide rail of a car seat according to claim 1, characterized in that: The upper rail assembly assembly (5) comprises an upper rail (51), an upper bearing (125), an upper bearing rotating bracket (120), an upper bearing fixing bracket (121), a backlash-eliminating tension spring (122) and a lower bearing (123), wherein the upper bearing fixing bracket (121) is fixed to the bottom of the side of the upper rail (51), the upper bearing (125) is connected to the upper bearing fixing bracket (121) through the upper bearing rotating bracket (120), the lower bearing (123) is fixed to the upper bearing fixing bracket (121) outside the upper bearing (125), one end of the backlash-eliminating tension spring (122) is hooked on the upper bearing rotating bracket (120), and the other end is hooked in a notch provided on the upper bearing fixing bracket (121); the upper rail assembly assembly (5) is connected to the lower rail assembly assembly (6) through the upper bearing (125) and the lower bearing (123), and the upper bearing (125) is fitted with an inclined surface in the lower rail assembly assembly (6).

4. The slide rail of a car seat according to claim 3, characterized in that: The dual-axis drive motor (12) is fixed on the drive motor bracket (11), and both ends of the drive motor bracket (11) are respectively fixed on the two upper rails (51) at the front and rear via connecting plates.

5. The slide rail of a car seat according to claim 3, characterized in that: The lower rail assembly assembly (6) comprises a lower rail (62), a slide rail cover (63) and a slide rail end cover (64), wherein the slide rail cover (63) is provided with a slide rail end cover (64) at both ends, a groove is provided in the middle of the slide rail cover (63), a slide rail cover soft edge is provided in the groove, the slide rail cover (63) is fixed on the lower rail (62), so that the groove on the slide rail cover (63) is aligned with the track of the lower rail (62), and the lower rail (62) is provided with a lower rail window (61); the upper rail (51) passes through the slide rail cover soft edge and extends into the lower rail (62), so that the upper bearing (125) and the lower bearing (123) are matched and connected in the track of the lower rail (62), and the upper bearing (125) is fitted with the inclined surface on the inner side of the track of the lower rail (62).

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