Electric long sliding rail

Abstract

The utility model relates to an electric long sliding rail which comprises lower sliding rails located on the left side and the right side respectively, transmission lead screws are rotationally installed in the two lower sliding rails respectively, and upper sliding rails capable of moving front and back along the lower sliding rails are installed on the transmission lead screws of the two lower sliding rails. A driving mechanism is fixedly installed between the two lower sliding rails, reduction gear boxes are arranged at the positions, corresponding to the driving mechanism, in the two lower sliding rails respectively, the driving mechanism is connected with the power input ends of the reduction gear boxes on the two sides through transmission flexible shafts, and the power output ends of the reduction gear boxes are connected with the driving end of the transmission lead screw. According to the automobile seat sliding rail, the defect that the height of a seat is relatively high due to the fact that more avoiding space is reserved for front-back displacement of an electric drive part in a traditional automobile seat sliding rail can be overcome, and the requirement for the low sitting posture state of the seat is met.

Description

Technical Field

[0001] The present application relates to the field of automobile seat slide rails, and in particular to a long electric slide rail. Background Art

[0002] At present, there are two common ways to adjust car seat slides, one is manual adjustment with human assistance, and the other is electric adjustment.

[0003] The common electric adjustment structure of the car seat slide rail is a double-screw long slide rail for car seats disclosed in Chinese patent publication No. CN113232556A, which includes a motor assembly and a right slide rail and a left slide rail with mutually symmetrical structures; 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 motor assembly, the screw transmission mechanism and the gearbox work together to drive the mutual sliding between the upper slide rail and the lower slide rail.

[0004] Another example is a steplessly adjustable electric long slide disclosed in Chinese patent publication No. CN111016747A, which includes a first slide rail and a second slide rail. The driving structure between the first slide rail and the second slide rail is also used, in which a motor assembly, a screw transmission mechanism and a gearbox work together to drive the mutual sliding between the upper slide rail and the lower slide rail.

[0005] Another example is a slide rail assembly that can be installed in a hidden manner disclosed in Chinese patent publication No. CN111923788A, which includes two groups of lower rails each having a sliding inner cavity, a group of upper slide rails installed on each of the two groups of lower rails, a screw rod extending along its length direction fixed in the sliding inner cavity, a gear box that cooperates with the screw rod thread installed at the bottom of the upper slide rail, the two groups of upper slide rails are provided with mounting parts that pass through the sliding inner cavity, a motor bracket is provided between the two mounting parts, the motor bracket is provided with a horizontally arranged transverse rotating shaft, and a motor that drives the transverse rotating shaft to rotate, a longitudinal rotating shaft extending downwardly is provided on the mounting part, the transverse rotating shaft and the longitudinal rotating shaft are connected by a gearbox power connection, and the lower end of the longitudinal rotating shaft is connected to the gearbox power, and the motor assembly, screw transmission mechanism and gearbox are also used to work together to drive the mutual sliding between the upper slide rail and the lower slide rail.

[0006] However, the inventor believes that although this common electric adjustment structure of the car seat slide can use the motor assembly, the screw transmission mechanism and the gearbox to work together to drive the mutual sliding between the upper slide rail and the lower slide rail, because its motor assembly is fixedly installed between the upper slide rails, this causes the upper slide rail and the lower slide rail to move relative to each other. In the horizontal plane area where the upper slide rail runs forward and backward, it is necessary to ensure the displacement space of the motor assembly. Therefore, during the design, the relative height of the car seat has to be adjusted according to this requirement, which inevitably leads to the defect of a relatively high seat height. Summary of the Invention

[0007] In order to improve the defect of relatively high seat height caused by the large avoidance space reserved for the forward and backward displacement of the electric drive part in the traditional car seat slide rail, the demand for a low sitting position of the seat can be achieved.

[0008] This application provides an electric long slide rail, which adopts the following technical solution:

[0009] An electric long slide rail comprises lower rails located on the left and right sides respectively, wherein transmission screws are rotatably installed in the two lower rails respectively, and upper slide rails that can be displaced forward and backward along the lower rails are installed on the transmission screws on the two lower rails; a driving mechanism is fixedly installed between the two lower rails, and reduction gear boxes are respectively provided at positions corresponding to the driving mechanisms in the two lower rails, the driving mechanism is connected to the power input ends of the reduction gear boxes on both sides through a transmission flexible shaft, and the power output end of the reduction gear box is connected to the driving end of the transmission screw.

[0010] Optionally, screw mounting seats are respectively provided at positions near both ends of the transmission screw in the lower slide rail, the upper slide rail is located between the two screw mounting seats, an angular contact bearing is installed on the screw mounting seat close to the reduction gear box side, and a deep groove ball bearing is installed on the screw mounting seat away from the reduction gear box side, and the two ends of the transmission screw are passed through the corresponding angular contact bearings and deep groove ball bearings.

[0011] Optionally, the ends of the transmission screw corresponding to the angular contact bearing and the deep groove ball bearing are all provided with necking portions.

[0012] Optionally, a limit stop seat is provided on one side of the screw mounting seat close to the reduction gear box, and the screw mounting seat is located between the limit stop seat and the reduction gear box.

[0013] Optionally, the transmission screw is provided with axial limit locking blocks on both sides of the limit stop seat.

[0014] Optionally, seat connecting seats are respectively provided at the front and rear ends of the upper slide rail, and a worm gear box that meshes with the transmission screw is installed on the inner side of the upper slide rail. The worm gear box includes a worm gear box body and a worm wheel. The worm gear box body is fixedly installed on the inner side of the upper slide rail, and the worm wheel is rotatably arranged in the worm gear box body. The middle part of the worm wheel is provided with an engaging mounting hole that passes through the front and rear end surfaces. The transmission screw is passed through the engaging mounting hole and meshes with the worm wheel for transmission.

[0015] Optionally, spaced vertical mounting grooves are respectively provided on opposite side walls of the upper slide rail, and vertical mounting bars adapted to the vertical mounting grooves are provided on the worm gear housing.

[0016] Optionally, a drive mounting bracket is fixedly installed between the two lower sliding rails, a drive mounting slot is provided in the middle of the drive mounting bracket, and the drive mechanism is installed in the drive mounting slot.

[0017] Optionally, the driving mechanism is a dual-axis motor, and the two power output ends of the dual-axis motor are correspondingly connected to a transmission flexible shaft.

[0018] Optionally, the reduction gearbox is a two-stage transmission gearbox, which includes a reduction gearbox body, a meshing worm wheel and a worm, and the worm wheel and the worm are rotatably arranged in the reduction gearbox body, the power input end of the worm is connected to the corresponding transmission flexible shaft, and the output end of the worm wheel is fixedly connected to the corresponding end of the transmission screw.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] 1. By fixing the drive mechanism between the two lower rails and providing reduction gearboxes as power transmission intermediaries at positions corresponding to the drive mechanisms in the two lower rails, the power is output to the transmission screw. Since the drive mechanism and the transmission flexible shaft will not move with the seat, the problem of high noise caused by the movement of the noise source with the seat is reduced. This improves the defect of relatively high seat height caused by the large avoidance space reserved for the forward and backward displacement of the electric drive part in traditional car seat slides, and meets the demand for a low sitting position of the seat. In addition, the continuity of the forward and backward movement of the slide rails is very good, there will be no sense of frustration, and there is no locking sound or metal collision sound when stopping, which greatly improves the quietness.

[0021] 2. The setting of angular contact bearings can make the transmission screw move stably, and can provide sufficient support force and rigidity, while being able to withstand the axial load and torque transmitted by the transmission screw; the setting of deep groove ball bearings can provide additional support force for the transmission screw, so that it can run stably, and increase the rigidity and stability of the entire motion system, so as to reduce the deflection of the transmission screw and improve the operating accuracy of the entire system.

[0022] 3. The reduction gearbox connects the flexible shaft and the transmission screw. The reduction gearbox is designed as a two-stage transmission structure and contains a set of worm gear components inside, which improves the transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an electric long slide rail according to an embodiment of the present application.

[0024] Figure 2 This is one of the schematic cross-sectional views of an electric long slide rail according to an embodiment of the present application.

[0025] Figure 3 This is the second schematic cross-sectional structure diagram of an electric long slide rail in an embodiment of the present application.

[0026] Figure 4 yes Figure 2 Schematic diagram of the locally enlarged structure of part A.

[0027] Figure 5 yes Figure 3 Schematic diagram of the locally enlarged structure of part B.

[0028] Figure 6 yes Figure 3 Schematic diagram of the locally enlarged structure of part C.

[0029] Figure 7 This is a schematic structural diagram of an upper slide rail in an electric long slide rail according to an embodiment of the present application.

[0030] Figure 8 This is a structural schematic diagram of a worm gear box in an electric long slide rail according to an embodiment of the present application.

[0031] Explanation of the accompanying reference numerals: 1. Lower slide rail; 2. Upper slide rail; 3. Transmission screw; 4. Drive mounting bracket; 5. Dual-axis motor; 6. Transmission flexible shaft; 7. Reduction gear box; 8. Worm gear; 9. Worm; 10. Screw mounting seat; 11. Angular contact bearing; 12. Deep groove ball bearing; 13. Shrinkage neck; 14. Limit stop seat; 15. Axial limit locking block; 16. Seat connecting seat; 17. Worm gear box; 18. Vertical mounting groove; 19. Vertical mounting bar. DETAILED DESCRIPTION

[0032] The following is combined with Figures 1 to 8 This application is described in further detail.

[0033] The embodiment of the present application discloses an electric long slide rail. Figures 1 to 3 , including a lower slide rail 1, an upper slide rail 2, a transmission screw 3, and a driving mechanism located on the left and right sides respectively. The transmission screw 3 is rotatably installed in the two lower slide rails 1 respectively. The two lower slide rails 1 are equipped with an upper slide rail 2 that can be displaced forward and backward along the lower slide rail 1 on the transmission screw 3.

[0034] The driving mechanism is fixedly installed between the two lower rails 1. The specific structure is as follows: a driving mounting bracket 4 is fixedly installed between the two lower rails 1, a driving mounting slot is provided in the middle of the driving mounting bracket 4, and the driving mechanism is installed in the driving mounting slot; Figure 4 , reduction gear boxes are respectively provided at positions corresponding to the driving mechanisms in the two lower slide rails 1, and the driving mechanism is connected to the power input ends of the reduction gear boxes on both sides through a transmission flexible shaft 6; in this embodiment, the driving mechanism is a dual-axis motor 5, and the two power output ends of the dual-axis motor 5 are correspondingly connected to a transmission flexible shaft 6.

[0035] The reduction gearbox in this embodiment is a two-stage transmission gearbox, which includes a reduction gearbox body 7, a meshing worm wheel 8 and a worm 9. The worm wheel 8 and the worm 9 are rotatably arranged in the reduction gearbox body 7. The power input end of the worm 9 is connected to the corresponding transmission flexible shaft 6, and the output end of the worm wheel 8 is fixedly connected to the corresponding end of the transmission screw 3.

[0036] This design has the following advantages: (1) The lower slide rail 1 can be directly connected to the vehicle body, so the dual-axis motor 5 and the transmission flexible shaft 6 will not move with the seat, thereby reducing the noise source moving with the seat, causing loud noise, and improving the sound quality; (2) The dual-axis motor 5 and the transmission flexible shaft 6 can be arranged in the vehicle body carpet, which can effectively isolate the noise source of the motor and flexible shaft transmission, and improve the sound quality; (3) The dual-axis motor 5 wiring harness can be directly connected to the vehicle body wiring harness, and the seat does not need to be connected to the motor wiring harness of the slide rail. It only needs to arrange the slide rail forward and backward movement control module, thereby reducing the problem of a large number of wiring harnesses and wiring harness storage boxes that need to be arranged due to the long stroke; (4) The upper slide rail 2 has sufficient space and does not have parts such as motors, transmission shafts, brackets, etc., providing space for the seat to fully arrange leg rests, ventilation, heating, wiring harnesses and other auxiliary functions, and fully reducing the block value of the seat frame.

[0037] Reference Figure 5 In this embodiment, screw rod mounting seats 10 are respectively provided at positions near the two ends of the transmission screw rod 3 in the lower slide rail 1, and the upper slide rail 2 is located between the two screw rod mounting seats 10. An angular contact bearing 11 is installed on the screw rod mounting seat 10 on the side close to the reduction gear box, which can enable the transmission screw rod 3 to run stably and provide sufficient support force and rigidity, and at the same time can withstand the axial load and torque transmitted by the transmission screw rod 3; a deep groove ball bearing 12 is installed on the screw rod mounting seat 10 on the side away from the reduction gear box, which can provide additional support force for the transmission screw rod 3, so that it can run stably, and increase the rigidity and stability of the entire motion system, so as to reduce the deflection of the transmission screw rod 3 and improve the accuracy of the entire motion system; wherein, the two ends of the transmission screw rod 3 are passed through the corresponding angular contact bearings 11 and deep groove ball bearings 12, and the ends of the transmission screw rod 3 corresponding to the angular contact bearings 11 and deep groove ball bearings 12 are all provided with necking parts 13, and the power output end of the reduction gear box is connected to the driving end of the transmission screw rod 3.

[0038] Reference Figure 5 In order to improve the limiting capacity in the axial direction, a limit stop seat 14 is provided on the side of the screw mounting seat 10 close to the reduction gear box. The screw mounting seat 10 is located between the limit stop seat 14 and the reduction gear box. At the same time, axial limit locking blocks 15 are respectively provided on both sides of the transmission screw and the limit stop seat 14.

[0039] Reference Figure 6In this embodiment, the front and rear ends of the upper slide rail 2 are respectively provided with seat connecting seats 16, and a worm gear 8 gearbox engaged with the transmission screw 3 is installed on the inner side of the upper slide rail 2. The worm gear 8 gearbox includes a worm gear box body 17 and a worm wheel 8. The worm gear box body 17 is fixedly installed on the inner side of the upper slide rail 2, and the worm wheel 8 is rotatably arranged in the worm gear box body 17. The middle part of the worm wheel 8 is provided with an engaging mounting hole running through the front and rear end surfaces. The transmission screw 3 is passed through the engaging mounting hole and engaged with the worm wheel 8 for transmission. In addition, in order to have a better positioning effect when the worm wheel 8 gearbox is installed, reference is made to FIG. Figure 7 、 8 , vertical mounting grooves 18 are respectively provided on the two opposite side walls of the upper slide rail 2 , and vertical mounting strips 19 adapted to the vertical mounting grooves 18 are provided on the worm gear housing 17 .

[0040] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An electric long slide rail, comprising lower slide rails (1) respectively located on the left and right sides, wherein a transmission screw (3) is rotatably mounted in the two lower slide rails (1), and an upper slide rail (2) is mounted on the transmission screw (3) on the two lower slide rails (1) and can move forward and backward along the lower slide rails (1); It is characterized in that A driving mechanism is fixedly installed between the two lower slide rails (1), and reduction gear boxes are respectively arranged at positions corresponding to the driving mechanisms in the two lower slide rails (1). The driving mechanism is connected to the power input ends of the reduction gear boxes on both sides via a transmission flexible shaft (6), and the power output end of the reduction gear box is connected to the driving end of the transmission screw rod (3).

2. The electric long slide rail according to claim 1, It is characterized in that Screw mounting seats (10) are respectively arranged at positions close to both ends of the transmission screw (3) in the lower slide rail (1), the upper slide rail (2) is located between the two screw mounting seats (10), an angular contact bearing (11) is installed on the screw mounting seat (10) close to the reduction gear box, and a deep groove ball bearing (12) is installed on the screw mounting seat (10) away from the reduction gear box, and the two ends of the transmission screw (3) are inserted into the corresponding angular contact bearing (11) and deep groove ball bearing (12).

3. The electric long slide rail according to claim 2, It is characterized in that The ends of the transmission screw (3) corresponding to the angular contact bearing (11) and the deep groove ball bearing (12) are all provided with a contracted neck (13).

4. The electric long slide rail according to claim 2, It is characterized in that A limit stop seat (14) is provided on one side of the screw rod mounting seat (10) close to the reduction gear box, and the screw rod mounting seat (10) is located between the limit stop seat (14) and the reduction gear box.

5. The electric long slide rail according to claim 4, It is characterized in that The transmission screw rod (3) is provided with axial limit locking blocks (15) on both sides of the limit stop seat (14).

6. The electric long slide rail according to claim 1, It is characterized in that The front and rear ends of the upper slide rail (2) are respectively provided with seat connection seats (16); a worm gear (8) gear box meshing with the transmission screw (3) is installed on the inner side of the upper slide rail (2); the worm gear (8) gear box comprises a worm gear box body (17) and a worm wheel (8); the worm gear box body (17) is fixedly installed on the inner side of the upper slide rail (2); the worm wheel (8) is rotatably installed in the worm gear box body (17); a meshing installation hole penetrating through the front and rear end surfaces is provided in the middle of the worm wheel (8); the transmission screw (3) is inserted into the meshing installation hole and meshes with the worm wheel (8) for transmission.

7. The electric long slide rail according to claim 6, It is characterized in that The upper slide rail (2) is provided with spaced vertical installation grooves (18) on opposite side walls thereof, and the worm gear housing (17) is provided with vertical installation strips (19) matched with the vertical installation grooves (18).

8. The electric long slide rail according to claim 1, It is characterized in that A drive mounting bracket (4) is fixedly mounted between the two lower sliding rails (1), a drive mounting groove is provided in the middle of the drive mounting bracket (4), and a drive mechanism is mounted in the drive mounting groove.

9. The electric long slide rail according to claim 8, It is characterized in that The driving mechanism is a double-shaft motor (5), and two power output ends of the double-shaft motor (5) are correspondingly connected to a transmission flexible shaft (6).

10. The electric long slide rail according to claim 1, It is characterized in that The reduction gearbox is a two-stage transmission gearbox, comprising a reduction gearbox body (7), a worm wheel (8) and a worm (9) meshing with each other, the worm wheel (8) and the worm (9) being rotatably arranged in the reduction gearbox body (7), the power input end of the worm (9) being connected to the corresponding transmission flexible shaft (6), and the output end of the worm wheel (8) being fixedly connected to the corresponding end of the transmission screw (3).

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