Gear-driven step device

Abstract

The utility model discloses a gear drive step device, install between side -sliding door and step, including sliding door pull rod, transmission mechanism and slide bar, the fixed end of sliding door pull rod is connected side -sliding door and is formed with the movement direction of sliding door pull rod and side -sliding door one angle of inclusion, transmission mechanism is axial rotation device and axial reciprocating motion device combination formation, the movement end of sliding door pull rod fixed connection axial rotation device's pivot, a pair of slide bar telescopic assembly between step and car body, and the slide post axial fixed connection axial reciprocating motion device of at least one slide bar, the utility model discloses compared with traditional side -sliding door step device, has increased mechanical transmission device, has realized the linkage of step and side -sliding door, and step hides in the lower part of car body in the case of not using, has improved the aesthetic degree of whole car, has reduced the risk of step device damage, can reduce the whole car drag coefficient, promotes product performance, has improved the satisfaction of user to product.

Description

Technical Field

[0001] This utility model relates to the field of automotive step design technology, specifically a gear-driven step device. Background Technology

[0002] The sliding door step device of a car is mainly installed on the outside of the vehicle body for passengers to get on and off. Most existing sliding door step devices are installed at the bottom of the sliding door and cannot extend or retract automatically. The step device is prone to damage if it is extended for a long time.

[0003] A search revealed that electrically retractable steps also exist on the market, but they require additional electrical control equipment, which increases both cost and failure rate. Utility Model Content

[0004] The purpose of this utility model is to provide a gear transmission device for a side sliding door step without changing the existing step design style, so as to realize the linkage between the step and the side sliding door.

[0005] A gear-driven step device is installed between a side sliding door and a step for linkage of opening and closing the side sliding door and extending and retracting the step. It includes a sliding door rod, a transmission mechanism, and sliding rods. The fixed end of the sliding door rod is rotatably connected to the side sliding door, and the sliding door rod forms an angle with the direction of movement of the side sliding door. The transmission mechanism is a combination of an axial rotating device and an axial reciprocating motion device, and the moving end of the sliding door rod is fixedly connected to the shaft of the axial rotating device. A pair of sliding rods are telescopically assembled between the step and the vehicle body, and the sliding column of at least one sliding rod is axially fixedly connected to the axial reciprocating motion device.

[0006] The working principle is as follows: the opening and closing of the side sliding door will drive the sliding door lever to move. However, since the other end of the lever is fixed to the shaft of the gear, it will naturally drive the gear to rotate by a certain angular displacement. The rotation of the gear will drive the meshing rack to move laterally by a certain distance, thus realizing the linkage between the side sliding door and the step.

[0007] Compared with traditional side sliding door step devices, this utility model adds a transmission device, realizing the linkage between the step and the side sliding door. When not in use, the step is hidden under the vehicle body, which improves the overall aesthetics of the vehicle, reduces the risk of damage to the step device, reduces the overall vehicle drag coefficient, improves product performance, and increases user satisfaction with the product.

[0008] A further technical solution involves a sliding door lever consisting of a pair of linear telescopic guide rails, including an inner sliding door guide rail and an outer sliding door guide rail. One end of the inner sliding door guide rail is rotatably connected to the side sliding door, and the inner sliding door guide rail forms an angle with the movement direction of the side sliding door. The outer sliding door guide rail is fixedly connected to the rotating shaft of the gear device via a sleeve. When the side sliding door moves, the sliding door lever drives the rotating shaft of the gear device to form a preset angular displacement, which in turn drives the rack to move axially a certain distance, thereby realizing the extension and retraction of the step.

[0009] A further technical solution involves an axial rotation device and an axial reciprocating motion device that are power transmission devices consisting of a gear device and a rack meshing with each other. One end of the rack is fixedly connected to the step, and the guide cylinder of the sliding rod is fixed on the step bracket. The guide cylinder of the sliding rod has a slot for the rack to mesh with the gear device. The gear device is rotatably mounted on the step bracket, and the shaft of the gear device is fixedly connected to one end of the sliding door pull rod.

[0010] A further technical solution involves fixing the rack axially to the slide column or pre-machining the rack on the axial surface of the slide column.

[0011] A further technical solution also includes step brackets, which are a pair of L-shaped brackets connected to the frame by bolts and nuts. A step crossbeam is provided between the step brackets, the guide tube of the sliding rod is fixed on the step crossbeam, and the gear device is fixed on the step crossbeam by a gear mounting bracket.

[0012] A further technical solution involves installing a dust cover on the outside of the gear assembly, with an upper dust cover bracket and a lower dust cover bracket on the step beam, and the dust cover being connected to the upper and lower dust cover brackets by bolts and nuts.

[0013] A further technical solution involves welding one end of the guide cylinder of the sliding rod to the step bracket, and welding the other end of the guide cylinder of the sliding rod to the step beam.

[0014] A further technical solution is that the gear device can be formed by a single gear or a gear set. The gear set mainly consists of a first shaft gear, a second shaft upper gear, and a second shaft lower gear. The teeth of the first shaft gear and the second shaft gear mesh with each other to transmit power. The second shaft lower gear and the second shaft upper gear are mounted on the same shaft, and the rack meshes with the second shaft lower gear.

[0015] A further technical solution involves a sliding door inner guide rail rotatably connected to the side sliding door via bolts and nuts, and a sliding door outer guide rail connected to the first shaft gear via a bushing; the sliding door inner guide rail is installed in the groove of the sliding door outer guide rail, and the sliding door inner guide rail can slide within the groove of the sliding door outer guide rail. A further advanced technical solution involves injection molding the steps from PP material, with horizontal and vertical reinforcing ribs at the bottom of the steps to improve their strength.

[0016] The beneficial effects of this utility model are: A gear-driven pedal system was designed that automatically extends or retracts as the sliding door moves, reducing manual labor and the likelihood of pedal damage. The gear drive offers a long lifespan, smooth and reliable operation, extending the pedal's lifespan and increasing user satisfaction. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a gear-driven step device. Figure 2 This is a schematic diagram of a partial internal structure of the gear mechanism; Figure 3 Schematic diagram of the overall internal structure of the gear positioning device; Figure 4 This is a schematic diagram of the bottom structure of the step.

[0018] Attached diagram descriptions: 1. Inner guide rail of sliding door; 2. Outer guide rail of sliding door; 3. Step bracket; 4. Step beam; 5. Dust cover; 6. Step; 7. First shaft gear; 8. Upper gear of second shaft; 9. Lower gear of second shaft; 10. Rack; 11. Rack housing; 12. Gear mounting bracket; 13. Upper dust cover bracket; 14. Lower dust cover bracket; 15. Sliding column; 16. Guide cylinder. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings: like Figure 1 As shown, a gear-driven step device includes an inner sliding door guide rail 1, an outer sliding door guide rail 2, a step bracket 3, a step crossbeam 4, a gear assembly, a dust cover 5, and a step 6. The inner sliding door guide rail 1 is rotatably connected to the side sliding door via bolts and nuts, and the outer sliding door guide rail 2 and the first shaft gear 7 are connected via bushings. The inner sliding door guide rail 1 is installed in the groove of the outer sliding door guide rail 2, and the inner sliding door guide rail 1 can slide within the groove of the outer sliding door guide rail 2. Both the inner and outer sliding door guide rails are made of aluminum alloy with a thickness of 4mm.

[0020] like Figure 2 , Figure 3 and Figure 4As shown, the gear device consists of gears, a rack, and a rack housing. The first shaft gear 7, the second shaft upper gear 8, and the second shaft lower gear 9 are all spur gears. The first shaft gear 7 meshes externally with the second shaft upper gear 8, and the second shaft lower gear 9 is mounted on the same shaft as the second shaft upper gear 8. The second shaft lower gear 9 drives the rack 10 to extend and retract. The dust cover upper bracket 13 and the dust cover lower bracket 14 are welded to the upper and lower ends of the step beam 4, respectively, using CO2 gas shielded welding. The end of the sliding column 15 is bolted to the step 6, and the guide cylinder 16 is welded to the step bracket 3 and the step beam 4, respectively. The rack housing is a cylindrical tube with an outer diameter of 46mm and a wall thickness of 3mm. From the outside to the inside, it connects to the step, the step beam 4, and the step bracket, using CO2 gas shielded welding.

[0021] like Figure 1 As shown, the step bracket 3 is an L-shaped stamped part with two mounting holes. The bracket is fixed to the frame by bolts through the mounting holes. Weight reduction holes are opened on the side of the step bracket 3 to reduce the weight of the bracket.

[0022] like Figure 1 As shown, the step beam 4 is made of square tube with a cross-sectional size of 40mm*40mm and a thickness of 2mm. Two through holes are opened on the side of the step beam 4. The through holes are used for welding after the rack housing is inserted. Carbon dioxide gas shielded welding is used during welding.

[0023] like Figure 1 and Figure 2 As shown, the upper support 13, lower support 14, and dust cover 5 are provided with several mounting holes. The dust cover 5 is fixed to the upper support 13 and lower support 14 of the dust cover through the bolts and nuts in the mounting holes. The dust cover 5 is 3mm thick and made of PP material.

[0024] like Figure 3 As shown, the gear mounting bracket 12 is formed by stamping, with a thickness of 3mm. It has three waist-shaped mounting holes, two on the upper end and one on the side, all of which are connected to the step beam 4 by bolts and nuts.

[0025] like Figure 4As shown, step 6 is injection molded from PP material. The bottom of step 6 features horizontal and vertical reinforcing ribs to enhance its strength. Two mounting seats are located at the bottom of step 6, each pre-embedded with two M10mm insert nuts. The rack 10 and slide post 15 are connected to the mounting seats of step 6 via M10mm bolts. The working principle is as follows: when the side sliding door is opened, the rack and pinion mechanism drives the step to extend outwards; when the side sliding door is closed, the rack and pinion mechanism drives the step to retract inwards. This allows step 6 to be concealed under the vehicle body when not in use, avoiding the risk of damage from exposed step 6, extending its service life, and improving the product's aesthetics and perceived quality.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely for further illustrating the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A gear-driven step device, installed between a side sliding door and a step (6), used for the linkage of opening and closing of the side sliding door and extending and retracting of the step (6), characterized in that: It includes a sliding door handle, a transmission mechanism, and a sliding rod; the fixed end of the sliding door handle is rotatably connected to the side sliding door and the sliding door handle forms an angle with the direction of movement of the side sliding door; the transmission mechanism is formed by combining an axial rotation device and an axial reciprocating motion device, and the moving end of the sliding door handle is fixedly connected to the rotating shaft of the axial rotation device; a pair of sliding rods are telescopically assembled between the step (6) and the vehicle body, and the sliding column (15) of at least one sliding rod is axially fixedly connected to the axial reciprocating motion device.

2. The gear-driven step device according to claim 1, characterized in that, The axial rotation device and the axial reciprocating motion device are power transmission devices in which a gear device and a rack (10) mesh with each other. One end of the rack (10) is fixedly connected to the step (6), and the guide cylinder (16) of the sliding rod is fixed on the step bracket (3). The guide cylinder (16) of the sliding rod has a slot for the rack (10) to mesh with the gear device. The gear device is rotatably assembled on the step bracket (3), and the rotating shaft of the gear device is fixedly connected to one end of the sliding door pull rod.

3. The gear transmission step device according to claim 2, characterized in that, The rack (10) is axially fixed on the rack housing (11) or the rack (10) is pre-machined on the axial surface of the slide column (15).

4. The gear-driven step device according to claim 2, characterized in that, The step bracket (3) is a pair of "L"-shaped brackets connected to the frame by bolts and nuts. A step beam (4) is provided between the step brackets (3). The guide tube (16) of the sliding rod is fixed on the step beam (4). The gear device is fixed on the step beam (4) by the gear mounting bracket (12).

5. The gear-driven step device according to claim 2, characterized in that, One end of the guide tube (16) of the sliding rod is welded and fixed to the step bracket (3), and the other end of the guide tube (16) of the sliding rod is welded and fixed to the step beam (4).

6. The gear-driven step device according to claim 1 or 2, characterized in that, The sliding door lever is a pair of linear telescopic guide rails including an inner sliding door guide rail (1) and an outer sliding door guide rail (2). One end of the inner sliding door guide rail (1) is rotatably connected to the side sliding door, and the inner sliding door guide rail (1) and the movement direction of the side sliding door form an angle. The outer sliding door guide rail (2) is fixedly connected to the rotating shaft of the gear device through a sleeve. When the side sliding door moves, the sliding door lever drives the rotating shaft of the gear device to form a preset angular displacement.

7. The gear-driven step device according to claim 6, characterized in that, The inner guide rail (1) of the sliding door is rotatably connected to the side sliding door through a ball joint, and the outer guide rail (2) of the sliding door and the rotating shaft of the gear device are connected through a bushing; the inner guide rail (1) of the sliding door is installed in the groove of the outer guide rail (2) of the sliding door, and the inner guide rail (1) of the sliding door can slide in the groove of the outer guide rail (2) of the sliding door.

8. The gear-driven step device according to any one of claims 2, 4, or 7, characterized in that, A dust cover (5) is installed on the outside of the gear device. The step beam (4) is provided with an upper support (13) and a lower support (14) for the dust cover (5). The dust cover (5) is connected to the upper support (13) and the lower support (14) of the dust cover (5) by bolts and nuts.

9. The gear-driven step device according to claim 2, 4, or 7, characterized in that, The gear device can be formed by a single gear or a gear set. The gear set mainly consists of a first shaft gear (7), a second shaft upper gear (8), and a second shaft lower gear (9). The teeth of the first shaft gear (7) and the second shaft gear mesh with each other to transmit power. The second shaft lower gear (9) and the second shaft upper gear (8) are mounted on the same shaft. The rack (10) meshes with the second shaft lower gear (9). The rotating shaft of the first shaft gear (7) is connected to the outer guide rail (2) of the sliding door through a bushing.

10. The gear-driven step device according to claim 1 or 2, characterized in that, The step (6) is injection molded from PP material, and the bottom of the step (6) is designed with horizontal and vertical reinforcing ribs.

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