A type of heavy-duty sliding rail for vehicles

Abstract

This utility model relates to the field of vehicle sliding rails and discloses a load-bearing sliding rail for vehicles, including a bracket, a bottom rail, and a bottom sliding seat inside the bottom rail. A top connecting frame is fixed on the bottom sliding seat, and a drive mechanism is provided on the bracket for transmission connection with the bottom sliding seat. The bottom rail includes a load-bearing rail core and an outer support shell wrapped around the outside of the load-bearing rail core. The load-bearing rail core has a groove in the middle and a load-bearing bottom surface at the bottom of the groove. The bottom sliding seat is nested inside the load-bearing rail core, and the bottom surface of the bottom sliding seat slides on the load-bearing bottom surface. This utility model uses a support frame as an independent structural component to support the sliding rail structure, so that a common-sized bottom rail can be used with the support frame to form a prefabricated component. Then, an optional cross frame can be used to adapt to different seat lengths, thereby increasing the flexibility of RV sliding rail customization. At the same time, the load-bearing rail core inside the bottom rail slides with the bottom sliding seat through surface contact, achieving greater load-bearing capacity while maintaining smooth sliding, allowing RV seats to be better customized and modified.

Description

Technical Field

[0001] This utility model relates to the field of automotive slide rails, specifically a load-bearing slide rail for vehicles. Background Technology

[0002] As the RV market expands, the demand for RV modifications also increases. Consumers want to utilize the space inside the RV to accommodate both seating and beds, so they often need to modify the RV with folding seats, using sliding rails to allow enough space when the seats are folded down.

[0003] However, in the current technology, the size requirements of the seat-style beds in RVs are diverse, and the required sliding rail sizes are also different. Therefore, the existing sliding rails have low flexibility in size customization. At the same time, the size of the beds is large and needs to support the weight of multiple people. Frequent changes in seat posture put a considerable test on the load-bearing life of the sliding rails, which the existing sliding rails cannot meet. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a load-bearing slide rail for vehicles.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vehicle-mounted load-bearing slide rail, comprising a bracket, a bottom rail mounted on both sides of the top of the bracket, and a bottom slide seat slidably nested within the bottom rail. The bottom slide seat is hollow and extends upwards with a fixed top connecting frame. A drive mechanism is provided on the bracket and is connected to the bottom slide seat for transmission. The bottom rail includes a load-bearing rail core and an outer support shell wrapped around the outside of the load-bearing rail core. The load-bearing rail core has a groove in the middle and a load-bearing bottom surface at the bottom of the groove. The bottom slide seat is nested within the load-bearing rail core, and the bottom surface of the bottom slide seat slides on the load-bearing bottom surface. The drive mechanism includes a drive motor and a lead screw driven by the drive motor. The lead screw is disposed within the load-bearing rail core. A bearing assembly is fixedly installed within the bottom slide seat. The bearing assembly includes a driven bearing, which is flexibly connected to the bottom slide seat and engages with the lead screw for transmission.

[0006] Furthermore, the slide groove is provided with side limiting ribs on both sides for sliding engagement with the side of the bottom slide block.

[0007] Furthermore, a middle limiting frame is fixedly provided at the top of the bottom slide block, and a top connecting frame is fixedly provided on the bottom slide block extending upward through the middle limiting frame; the width of the middle limiting frame is smaller than the width of the bottom slide block, and an inner buckling rib extending towards the center of the slide groove is provided at the top of the load-bearing rail core; the distance between the inner buckling ribs on both sides of the load-bearing rail core is smaller than the distance between the side limiting ribs on both sides; the side of the middle limiting frame slides in cooperation with the inner buckling rib.

[0008] Furthermore, the drive mechanism includes a corner box, which is installed on both sides of the bracket. The drive motor is installed in the middle of the bracket and is connected to the corner boxes on both sides through a transmission shaft. The lead screw is connected to the corner box.

[0009] Furthermore, the bearing assembly includes a soft sleeve and a fixed chamber. The driven bearing has laterally extending side wings on both sides. The soft sleeve has a groove and is nested on the side wings at the side end of the driven bearing through the groove. The fixed chamber is nested on the soft sleeve, and the fixed chambers on both sides of the driven bearing are fixedly installed on the inner wall of the bottom slide.

[0010] Furthermore, the fixed chamber is fixedly installed on the bottom slide by fixing bolts. The fixing bolts penetrate from the outside of the bottom slide to the inside of the bottom slide and connect to the fixed chamber. The side limiting ribs are provided with recessed clearance grooves to avoid the fixing bolts.

[0011] Furthermore, the soft sleeve at least covers the upper and lower ends of the side wings.

[0012] Furthermore, the diameter of the driven bearing is smaller than the height of the hollow portion of the bottom slide.

[0013] Furthermore, the support includes an upright support and a horizontal connecting frame. The upright support has a vertical frame structure. The upright support is located on both sides of the support and is fixedly connected in the middle by the horizontal connecting frame. The bottom rail is fixedly installed on the upright support.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention uses a support frame as an independent structural component to support the slide rail structure. This allows for the use of common-sized bottom rails and support frames to form prefabricated components. Optional cross braces can accommodate different seat lengths, increasing the flexibility of RV slide rail customization. Furthermore, the bottom rail features a self-lubricating load-bearing core that slides smoothly against the bottom slide block through surface contact. When the drive mechanism moves the bottom slide block, it achieves greater load-bearing capacity while maintaining smooth sliding. The load-bearing core is also covered by a metal outer shell, increasing its strength and facilitating the fixed connection between the bottom rail and the bracket, allowing for better customization and modification of RV seats. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a vehicle-mounted load-bearing slide rail according to the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the drive mechanism, corner box, and bottom slide of this utility model.

[0017] Figure 3This is a three-dimensional structural diagram of the bearing assembly of this utility model in conjunction with the bottom slide and the lead screw.

[0018] Figure 4 This is a front structural diagram of the bottom slide block, bearing assembly, and bottom rail of this utility model.

[0019] In the diagram: 1. Bracket; 2. Bottom rail; 3. Bottom slide; 4. Top connecting frame; 5. Drive mechanism; 6. Middle limit frame; 11. Vertical support frame; 12. Horizontal connecting frame; 21. Load-bearing rail core; 22. Outer support shell; 31. Bearing assembly; 51. Drive motor; 52. Transmission shaft; 53. Corner box; 54. Lead screw; 311. Driven bearing; 312. Side wing; 313. Soft sleeve; 314. Fixed chamber; 315. Fixing bolt; 211. Side limiting rib; 212. Relief groove; 213. Inner buckling rib. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0021] Examples, such as Figures 1-4 As shown: This utility model provides a vehicle load-bearing slide rail, including a bracket 1, a bottom rail 2 installed on both sides of the top of the bracket 1, and a bottom slide seat 3 slidably nested in the bottom rail 2. The bracket 1 includes a vertical support frame 11 and a horizontal connecting frame 12. The vertical support frame 11 has a vertical frame structure and is an independent structural component. The vertical support frame 11 is located on both sides of the bracket 1 and is fixedly connected in the middle by the horizontal connecting frame 12. The horizontal connecting frame 12 in the middle can be selected according to the actual width requirements. Then, the horizontal connecting frame 12 is welded and fixed to the vertical support frame 11 to form the frame structure of the bracket 1. The bottom rail 2 is fixedly installed on the support frame 11. The bottom rail 2 can be set to a common seat width size to support the seat, and then the optional cross frame 12 can be used to adapt to different seat lengths. The length mentioned here is the length between the left and right sides, that is, from the left side to the right side of the RV, while the width is the length between the front and rear sides. The bottom rail 2 includes a load-bearing rail core 21 and an outer support shell 22 wrapped around the outside of the load-bearing rail core 21. The load-bearing rail core 21 is made of plastic, while the outer support shell 22 is made of metal. The load-bearing rail core 21 is specifically made of plastic-based self-lubricating material, such as polyamide, fluoroplastic, polyoxymethylene, polycarbonate, high-density polyethylene, etc. The load-bearing rail core 21 has a recessed groove in the middle and a load-bearing bottom surface at the bottom of the groove. The outer support shell 22 wraps around the bottom surface, at least two sides and the top surface of the load-bearing rail core 21, and wraps around the opening of the groove on the top surface of the load-bearing rail core 21. Side limiting ribs 211 are provided on both sides of the groove. It should be noted that the surface of the side limiting ribs 211 is flat and can be used as the side walls on both sides of the groove, or as a separate flat strip structure on the side wall. In this embodiment, it is used as a separate flat strip structure on the side wall. The bottom slide block 3 is nested within the load-bearing rail core 21. The bottom surface of the bottom slide block 3 slides on the load-bearing bottom surface, thereby supporting the sliding bottom slide block 3 through the load-bearing rail core 21, obtaining a larger support surface and producing a better load-bearing effect. Simultaneously, a self-lubricating material is used, ensuring suitable sliding performance while maintaining a sufficient support surface, preventing metal debris from being generated due to metal friction. The side of the bottom slide block 3 slides in conjunction with the side limiting rib 211. The bottom slide block 3 is hollow and has a top connecting frame 4 fixedly extending upwards. Specifically, a middle limiting frame 6 with a width smaller than the bottom slide block 3 is fixedly installed at the top of the bottom slide block 3. The bottom slide block 3 is fixedly connected to the top connecting frame 4 through the middle limiting frame 6 extending upwards. Meanwhile, the load-bearing rail core 21... The top of the heavy rail core 21 is provided with an inner buckling rib 213 extending towards the middle of the slide groove. The distance between the inner buckling ribs 213 on both sides of the heavy rail core 21 is smaller than the distance between the side limiting ribs 211 on both sides. The inner buckling rib 213 is located at the opening at the upper end of the slide groove. The side of the middle limiting frame 6 slides with the inner buckling rib 213, and the inner buckling rib 213 and the bottom of the slide groove make clearance fit with the bottom slide seat 3. Thus, the inner buckling rib 213 and the side limiting rib 211 restrict the movement path of the bottom slide seat 3 and the middle limiting frame 6, making the sliding path of the bottom slide seat 3 straight. The inner buckling rib 213 and the bottom of the slide groove restrict the bottom slide seat 3 vertically, thereby preventing the bottom slide seat 3 from tilting after sliding.

[0022] The top connecting frames 4 on both sides of the bracket 1 are independent and are used to fix the vehicle seat. The bracket 1 is provided with a drive mechanism 5 that is connected to the bottom slide 3 for transmission, thereby driving the top connecting frame 4 and the seat to move. The drive mechanism 5 includes a drive motor 51, a corner box 53, and a lead screw 54 driven by the drive motor 51. The corner box 53 is installed on both sides of the bracket 1. The corner box 53 is a 90° corner box 53 in the prior art. The corner box 53 includes a housing and a bevel gear that meshes at 90° inside the housing. In this embodiment, the corner box 5... 3. The outer support shell 22 is fixedly installed on both sides of the bracket 1. The lead screw 54 is set in the load-bearing rail core 21 and connected to the corner box 53. The bearing assembly 31 is fixedly installed in the bottom slide 3. The bearing assembly 31 includes the driven bearing 311. The driven bearing 311 is engaged with the lead screw 54. The drive motor 51 is installed in the middle of the bracket 1 and is connected to the corner box 53 on both sides through the drive shaft 52. The two bevel gears are connected to the drive shaft 52 and the lead screw 54 respectively, converting the rotation of the drive shaft 52 into the rotation of the lead screw 54 in the right angle direction. In this embodiment, the drive motor 51 is a geared motor and is an automotive electric door and window motor. Since the cross frame 12 can be selected according to the actual required length, and a section of drive shaft 52 is stably installed on the drive motor 51, the drive shaft 52 extends to both sides of the motor and is then detachably connected to a separate drive shaft 52 of the required length through a bushing. The separate drive shaft 52 is connected to the corner boxes 53 on both sides respectively. The drive shaft 52 can be a four-corner drive shaft 52 or a hexagonal drive shaft 52.

[0023] In this embodiment, the driven bearing 311 is flexibly connected to the bottom slide 3. The driven bearing 311 has laterally extending side wings 312 on both sides. The bearing assembly 31 also includes a flexible sleeve 313 and a fixing chamber 314. The flexible sleeve 313 has a groove and is nested on the side wings 312 at the side end of the driven bearing 311 through the groove. The fixing chamber 314 is nested on the flexible sleeve 313. The flexible sleeve 313 at least covers the upper and lower ends of the side wings 312, and the diameter of the driven bearing 311 is smaller than the height of the hollow portion of the bottom slide 3. The driven bearing 311 has gaps at both the top and bottom of the bottom slide block 3, allowing the driven bearing 311 to move up and down. The fixed chambers 314 on both sides of the driven bearing 311 are fixedly installed on the inner wall of the bottom slide block 3. Specifically, the fixed chambers 314 are fixedly installed on the bottom slide block 3 by fixing bolts 315. The fixing bolts 315 penetrate from the outside of the bottom slide block 3 to the inside of the bottom slide block 3 and connect with the fixed chambers 314. The side limiting ribs 211 are provided with recessed clearance grooves 212 to avoid the fixing bolts 315.

[0024] In summary, in this embodiment, the bracket 1 is installed inside the vehicle, and the vehicle seat is fixedly installed on the top connecting frame 4. When the seat needs to be reclined, it needs to be moved forward to make room for the rear of the seat. The drive motor 51 drives the transmission shaft 52 to rotate. The rotation of the transmission shaft 52 is converted into the rotation of the right-angle screw 54 through the corner box 53. The rotation of the screw 54 causes the driven bearing 311, which meshes with it, to move along the axis of the screw 54. The driven bearing 311 pushes the soft sleeve 313 and the fixed chamber 314, thereby pushing the bottom slide 3 and the top connecting frame 4 to move. The bottom slide 3 is supported and limited by the load-bearing rail core 21, allowing the seat to move out in a straight line.

[0025] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A load-bearing slide rail for a vehicle, characterized by: It includes a bracket, bottom rails installed on both sides of the top of the bracket, and a bottom slide seat that is slidably nested in the bottom rail. The bottom slide seat is hollow and extends upward to be fixed with a top connecting frame. The bracket is provided with a drive mechanism that is connected to the bottom slide seat for transmission. The bottom rail includes a load-bearing rail core and an outer support shell wrapped around the outside of the load-bearing rail core. The load-bearing rail core has a groove in the middle and a load-bearing bottom surface at the bottom of the groove. The bottom slide seat is nested inside the load-bearing rail core, and the bottom surface of the bottom slide seat slides on the load-bearing bottom surface. The drive mechanism includes a drive motor and a lead screw driven by the drive motor. The lead screw is installed inside the load-bearing rail core. A bearing assembly is fixedly installed inside the bottom slide. The bearing assembly includes a driven bearing. The driven bearing is flexibly connected to the bottom slide and engages with the lead screw.

2. The load-bearing slide rail for vehicles according to claim 1, characterized in that: The slide groove is provided with side limiting ribs on both sides for sliding engagement with the side of the bottom slide block.

3. The load-bearing slide rail for vehicles according to claim 2, characterized in that: The bottom slide block is fixedly provided with a middle limiting frame at its top, and the bottom slide block is fixedly provided with a top connecting frame extending upward through the middle limiting frame; The width of the middle limiting frame is smaller than the width of the bottom slide block. The top of the load-bearing rail core is provided with an inner buckling rib extending towards the center of the slide groove. The distance between the inner buckling ribs on both sides of the load-bearing rail core is smaller than the distance between the side limiting ribs on both sides. The side of the middle limiting frame slides in cooperation with the inner buckling rib.

4. The load-bearing slide rail for vehicles according to claim 1, characterized in that: The drive mechanism includes a corner box, which is installed on both sides of the bracket. The drive motor is installed in the middle of the bracket and is connected to the corner boxes on both sides through a transmission shaft. The lead screw is connected to the corner box.

5. The load-bearing slide rail for vehicles according to claim 2, wherein: The bearing assembly includes a soft sleeve and a fixed housing. The driven bearing has laterally extending side wings on both sides. The soft sleeve has a groove and is nested on the side wings at the side end of the driven bearing through the groove. The fixed housing is nested on the soft sleeve and the fixed housings on both sides of the driven bearing are fixedly installed on the inner wall of the bottom slide.

6. The load-bearing slide rail for vehicles according to claim 5, characterized in that: The fixed chamber is fixedly installed on the bottom slide by fixing bolts. The fixing bolts penetrate from the outside of the bottom slide to the inside of the bottom slide and connect to the fixed chamber. The side limiting ribs are provided with recessed clearance grooves to avoid the fixing bolts.

7. A vehicle-mounted load-bearing slide rail according to claim 5, characterized in that: The soft sleeve covers at least the upper and lower ends of the side wings.

8. The load bearing slide rail for vehicles according to claim 5, wherein: The diameter of the driven bearing is smaller than the height of the hollow part of the bottom slide.

9. The load-bearing slide rail for vehicles according to claim 1, characterized in that: The support includes an upright support and a horizontal connecting frame. The upright support has a vertical frame structure. The upright support is located on both sides of the support and is fixedly connected in the middle by the horizontal connecting frame. The bottom rail is fixedly installed on the upright support.

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