Turnover type rear stepping device for vehicle

Abstract

A turnover type rear stepping device for a vehicle comprises a movable support which is rotationally connected with a longitudinal beam at the bottom of the vehicle through a hinge shaft, and a pedal piece is further fixedly connected to the movable support; a fixed locking hole and at least one overturning locking hole are formed in the longitudinal beam at the bottom of the vehicle, a locking groove is formed in the movable support, and a locking piece is arranged in the locking groove in a matched mode; when the movable support is unfolded to the horizontal using position, the locking piece penetrates through the locking groove and the fixed locking hole. When the movable support is overturned upwards, the locking piece penetrates through the locking groove and the overturning locking hole, and therefore locking after the movable support is overturned is achieved. By optimizing the structure, hinged connection of the movable support and the longitudinal beam at the bottom of the vehicle is achieved, unfolding-folding bistable fixing of the rear stepping device is achieved through the locking piece, the risk that the vehicle rubs the ground during stepping is effectively avoided, and the trafficability of the vehicle on abrupt slope road sections or extreme cross-country or emergency rescue scenes is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vehicle accessories, and particularly relates to a folding rear step device for vehicle. BACKGROUND

[0002] In the field of vehicle engineering, the functional design of vehicles always needs to seek a balance between convenience and passability. With the increasing demand of consumers for vehicle comfort and multi-scene adaptability, the rear step device (also known as rear step or rear step plate) of vehicles gradually becomes an important configuration of medium and large-sized passenger vehicles, pick-ups, business vehicles and special operation vehicles. Specifically, since the rear hatch of the above-mentioned vehicles such as pick-ups or special operation vehicles is relatively high from the ground in actual use, it is not very friendly for people to get on and off the vehicle, and there are also safety hazards in getting on and off the vehicle through other ways. The rear step device of the above-mentioned vehicles is fixed on the chassis load-bearing beam of the vehicle body in a rigid connection mode, and when in use, people can lift their own ground clearance by lightly pressing the pedal with their feet. Such a device significantly improves the convenience of passengers getting on and off the vehicle by reducing the height difference of passengers getting on and off the vehicle, and has important value for the elderly passengers, children and users carrying heavy objects. However, the structural design of the traditional rear step device has long been a technical bottleneck restricting the passability of the vehicle, and this problem is particularly prominent in the dynamic performance of the vehicle under complex road conditions.

[0003] In the prior art, the rear step device is mostly fixedly connected with the vehicle frame. Although this design can ensure the structural strength and service life, it inevitably leads to a significant reduction in the departure angle. According to the vehicle passability parameter defined in the SAE J689 standard, the departure angle is a key indicator representing the ability of the vehicle to cross obstacles at the rear, and its value directly depends on the geometric relationship between the lowest point of the rear bumper and the grounding point of the rear wheel. The installation position of the fixed rear step is usually about 150-300 mm lower than the reference line of the rear bumper, resulting in a general reduction of 30%-50% in the departure angle. Taking a typical urban SUV as an example, the original design departure angle can reach 25°, and after adding the fixed step, it may drop to 12°-15°, which is even lower than the passability level of ordinary cars. In the off-road non-paved road, steep slope section or water driving conditions, the rear step of the medium and large-sized vehicle has a high risk of grounding, which may cause structural damage to the device, or even cause secondary faults such as deformation of the vehicle frame and interference of the transmission system. In the climbing condition with a slope of more than 15%, the reaction force generated by the contact between the lower edge of the rear step and the slope will form a lever effect, causing the rear suspension system of the vehicle to bear abnormal load; when passing through the continuous undulating road, the intermittent collision between the fixed step and the ground not only produces abnormal noise, but also causes uncontrollable disturbance to the vehicle posture; and in water driving, the low-positioned step device will significantly increase the water flow resistance, affecting the stability and power output efficiency of the vehicle. More seriously, in the extreme off-road or emergency rescue scene, the grounding accident of the rear step may cause the vehicle to lose traction instantaneously, causing serious traffic interruption and even safety accidents.

[0004] In view of the above technical problems, some existing technical solutions propose to install a detachable or telescopic step at the rear of the medium and large-sized vehicle, but such structure has the following defects: the detachable device needs manual intervention and is inconvenient to store, and it is difficult to meet the immediate response demand of sudden road conditions; the electric telescopic mechanism can realize dynamic adjustment, but it has high system complexity, high failure rate and high cost, and the reliability of the precision transmission components will be greatly reduced in harsh environments such as sand erosion and low temperature freezing, thereby causing mechanical failure.

[0005] In view of the above situation, it is necessary to reasonably improve the existing rear step device of the vehicle. By breaking through the traditional rigid connection design paradigm and creatively introducing a free hinge mechanism, the rear step device can be dynamically adapted to different scenes while ensuring the convenience of getting on and off the vehicle. For this purpose, the applicant has made a useful design, and the technical solution to be introduced below is produced in this background. Practical new type content

[0006] The utility model discloses a folding rear step device for vehicle, which is convenient to assemble, safe, fast and reliable in use, and can be switched between unfolded and folded states according to road conditions, so as to realize double-stable control of the rear step device, improve the convenience of getting on and off the vehicle, prevent the rear step from being in contact with the ground, and significantly enhance the passing ability of the vehicle on steep slope sections, non-paved roads and water driving conditions.

[0007] The utility model discloses a folding rear step device for vehicle, which is convenient to assemble, safe, fast and reliable in use, and can be switched between unfolded and folded states according to road conditions, so as to realize double-stable control of the rear step device, improve the convenience of getting on and off the vehicle, prevent the rear step from being in contact with the ground, and significantly enhance the passing ability of the vehicle on steep slope sections, non-paved roads and water driving conditions.

[0008] In one specific embodiment of the utility model, the movable support has a main arm and a driven arm arranged in a perpendicular state; the hinge shaft passes through the end position of the main arm away from the driven arm in the length direction, and the hinge shaft is rotationally connected with the main arm; the pedal member is connected to the end position of the driven arm away from the main arm in the length direction; and at least one movable support locking hole is formed in the main arm, which can be moved to the position corresponding to the turning locking hole on the vehicle bottom longitudinal beam when the movable support is unfolded to the horizontal use position, and the firm locking between the movable support and the vehicle bottom longitudinal beam is realized by inserting the connecting member into the movable support locking hole and the turning locking hole.

[0009] In another specific embodiment of the utility model, a movable support sector plate is formed on the main arm of the movable support and at the position corresponding to one side of the vehicle bottom longitudinal beam.

[0010] In still another specific embodiment of the utility model, a buffer block extending towards the vehicle bottom longitudinal beam is arranged on the movable support and corresponds to the connecting position of the driving arm and the driven arm, and a soft buffer pad is fixedly installed on the buffer block, and when the movable support is unfolded to the horizontal use position, the soft buffer pad abuts against the bottom of the vehicle bottom longitudinal beam, thereby playing a shock-absorbing role.

[0011] In still another specific embodiment of the utility model, a damping sleeve is arranged on the hinge shaft, and the damping sleeve is used to slow down the impact force when the movable support is overturned.

[0012] In still another specific embodiment of the utility model, the tread edge of the pedal piece is bent downward to form a protective side edge, and anti-skid convex patterns are arranged on the tread surface of the pedal piece.

[0013] In still another specific embodiment of the utility model, the pedal piece is made of aluminum alloy extrusion forming and the surface is subjected to anodic oxidation treatment.

[0014] In still another specific embodiment of the utility model, the locking piece is one of a bolt, a screw or a buckle.

[0015] In still another specific embodiment of the utility model, the movable support is an integrally formed structure.

[0016] The utility model has the advantages that: first, the technical scheme optimizes the structure, realizes the rotary connection of the movable support 1 and the vehicle bottom longitudinal beam 3, and makes the rear stepping device switch between the unfolded (horizontal) and folded states according to the road condition requirement. When the vehicle passes through a steep slope or a complex environment, the rear stepping device can be quickly folded upward by using the quick plug-in locking piece, thereby realizing the "unfolding-folding" bistable fixation of the rear stepping device, effectively avoiding the risk of stepping on the ground, significantly enhancing the passing ability of the vehicle on the steep slope section, the extreme off-road or the emergency rescue scene, and the structure of the technical scheme is simple, the function is optimized and improved through the modification of small details, the production cost is low, the assembly is convenient, the technology is especially suitable for off-road vehicles, logistics transport vehicles and city SUVs and other vehicles with high passing requirements, the passing continuity is improved and safety accidents are avoided, the market competitiveness is remarkable, and the utility model has remarkable promotional significance. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an overall structure schematic view when the utility model is in the horizontal unfolded state.

[0018] Figure 2 It is an overall structure schematic view when the utility model is in the use folded state.

[0019] In the figure: 1. movable support, 11. locking groove, 12. driving arm, 13. driven arm, 14. movable support locking hole, 15. movable support sector plate, 16. buffer plate, 161. buffer pad; 2. hinged shaft, 21. damping sleeve; 3. vehicle bottom longitudinal beam, 31. fixed locking hole, 32. turnover locking hole; 4. pedal piece, 41. protective side; 5. locking piece. DETAILED DESCRIPTION

[0020] The following will be described in the form of examples, but the description of the examples is not a limitation on the technical scheme of the utility model, and any equivalent transformation only in form but not in substance made according to the concept of the utility model should be regarded as the technical scheme scope of the utility model.

[0021] In the following description, the directional or positional concepts of up, down, left, right, front and back are all relative to the current position of the utility model, and therefore should not be understood as a special limitation on the technical scheme provided by the utility model. Figure 1

[0022] Please refer to Figure 1 and Figure 2 The utility model relates to a kind of folding rear step devices for vehicle, comprising: a movable support 1, the movable support 1 is overall L-shaped plate piece structure configuration, the movable support 1 is realized with the rotating connection of vehicle bottom longitudinal beam 3 by hinged shaft 2, and the rotating plane of the movable support 1 is parallel to vehicle direction, and still fixedly connected with a pedal piece 4 on the movable support 1 and corresponding to the position of the end of the movable support 1 away from vehicle bottom longitudinal beam 3;And a fixed locking hole 31 and at least one turnover locking hole 32 are set on the vehicle bottom longitudinal beam 3, and a locking groove 11 is set on the movable support 1, and a locking piece 5 is arranged in the locking groove 11;When movable support 1 is unfolded to horizontal use position, the locking groove 11 is set corresponding to fixed locking hole 31, and the locking piece 5 passes through locking groove 11 and fixed locking hole 31, so as to realize the locking of movable support 1 and vehicle bottom longitudinal beam 3;When the movable support 1 is turned up to avoid the body of movable support 1 and pedal piece 4 rub ground, the locking groove 11 on the movable support 1 moves to the corresponding position of the turnover locking hole 32 of vehicle bottom longitudinal beam 3, and the locking piece 5 passes through locking groove 11 and turnover locking hole 32, so as to realize the locking after the turnover of movable support 1, to form "unfold-folding" bistable control, significantly improve vehicle angle of departure, avoid scratching under the working condition of non-paved road, steep slope section or wading in the wild, improve safety.

[0023] As Figure 1 and Figure 2 ​As shown in the drawings, the number of the aforementioned flip locking holes 32 is one, of course, the number is not limited thereto, as long as the opening position can correspond to the locking groove 11 after the movable support 1 is flipped, and the movable support 1 is fixed to the vehicle bottom longitudinal beam 3 by inserting the locking member 5, so that the movable support 1 can be fixed at different positions after being flipped, meeting the use requirements of the vehicle in different scenes.

[0024] Further, the aforementioned movable support 1 is provided with a driving arm 12 and a driven arm 13 arranged in a vertical state; the aforementioned hinge shaft 2 passes through the end position of the driving arm 12 away from the driven arm 13 in the length direction, and the hinge shaft 2 is rotationally connected with the driving arm 12; the aforementioned pedal member 4 is connected to the end position of the driven arm 13 away from the driving arm 12 in the length direction; and at least one movable support locking hole 14 is further formed in the driving arm 12, when the movable support 1 is unfolded to the horizontal use position, the driving arm 12 remains in a horizontal state, and the driven arm 13 remains in a vertical state, at this time, the aforementioned movable support locking hole 14 can be moved to a position corresponding to the aforementioned flip locking hole 32 on the vehicle bottom longitudinal beam 3, and the movable support 1 and the vehicle bottom longitudinal beam 3 are firmly locked by inserting the connecting member into the movable support locking hole 14 and the flip locking hole 32. When it is necessary to rotate the movable support 1, the locking member 5 is removed from the locking groove 11 and the fixed locking hole 31, and the movable support locking hole 14 and the flip locking hole 32 are also removed, so that the movable support 1 can be freely rotated relative to the vehicle bottom longitudinal beam 3, and subsequent folding and fixing can be realized.

[0025] In the embodiment, the movable support sector plate 15 is further formed on the driving arm 12 of the aforementioned movable support 1 and at a position corresponding to one side of the aforementioned vehicle bottom longitudinal beam 3, and the aforementioned locking groove 11 is formed on the movable support sector plate 15.

[0026] Please continue to see Figure 1 A buffer block 16 extending towards the aforementioned vehicle bottom longitudinal beam 3 is further formed on the aforementioned movable support 1 and at a position corresponding to the connection between the aforementioned driving arm 12 and the driven arm 13, and a soft buffer pad 161 is fixedly installed on the buffer block 16, when the movable support 1 is unfolded to the horizontal use position, the aforementioned soft buffer pad 161 abuts against the bottom of the aforementioned vehicle bottom longitudinal beam 3, thereby playing a role of shock absorption; the soft buffer pad 161 is preferably made of rubber or polyurethane material, and the soft buffer pad 161 elastically abuts against the lower surface of the bottom vehicle longitudinal beam 3, which can absorb high-frequency vibration energy during vehicle driving, prevent noise caused by rigid collision of metal parts, and inhibit pedal shaking through damping friction, and on the other hand, it can buffer the impact between the movable support 1 and the bottom vehicle longitudinal beam 3 when a passenger steps on the aforementioned pedal member 4, thereby ensuring the reliability of use.

[0027] In the embodiment, a damping sleeve 21 is sleeved on the aforementioned hinge shaft 2, which is used to slow down the impact force when the movable support 1 is overturned, thereby inhibiting the inertial impact, making the overturning operation process smooth and controllable, and especially suitable for the scene requirement of frequent folding and unfolding.

[0028] Further, the tread edge of the aforementioned pedal member 4 is bent downward to form a protective side edge 41, and the tread surface of the pedal member 4 is provided with anti-skid protrusions, which increase the friction coefficient between the passenger and the pedal member 4, thereby improving the safety in use in a wet and slippery environment.

[0029] In the embodiment, the aforementioned pedal member 4 is made of aluminum alloy by extrusion forming, and the surface thereof is treated by anodic oxidation.

[0030] Further, the aforementioned locking member 5 is one of a latch, a bolt or a buckle, which is suitable for the fastening needs of different types of vehicles and the maintenance convenience needs.

[0031] Preferably, the aforementioned movable support 1 is an integral structure, the aforementioned driving arm 12 and the driven arm 13 are an integral structure, the aforementioned driving arm 12 bears the main overturning torque, and the driven arm 13 extends to a distal end and fixes the pedal member 4, which disperses the tread surface to the hinge point of the driving arm 12 and the support point of the driven arm 13, reduces the stress concentration of a single point, improves the bending stiffness of the structure, and ensures that the pedal member 4 does not plastically deform when it is loaded.

[0032] It should be noted that the above embodiments can be freely combined as needed. The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be regarded as the protection scope of the present application.

[0033] In summary, the technical scheme provided by the present application remedies the shortcomings in the prior art, successfully completes the task of the present application, and truly realizes the technical effects described by the applicant in the technical effect column above.

Claims

1. A folding rear step device for vehicles, characterized in that, The utility model provides a kind of movable support (1), the movable support (1) is realized rotary connection with vehicle bottom longitudinal beam (3) by hinged shaft (2), and the rotary plane of the movable support (1) is parallel to vehicle direction of travel, and still fixedly connected with a pedal piece (4) on the movable support (1) and at the position corresponding to its end position away from vehicle bottom longitudinal beam (3);And a fixed locking hole (31) and at least one turnover locking hole (32) are opened in the vehicle bottom longitudinal beam (3), and a locking slot (11) is opened in the movable support (1), and a locking piece (5) is provided in the locking slot (11);When movable support (1) is unfolded to horizontal use position, the locking slot (11) is arranged corresponding to fixed locking hole (31), and the locking piece (5) passes through locking slot (11) and fixed locking hole (31), so as to realize the locking of movable support (1) and vehicle bottom longitudinal beam (3);When movable support (1) is turned up to avoid the body of movable support (1) and pedal piece (4) ground, the locking slot (11) on the movable support (1) moves to the position corresponding to the turnover locking hole (32) of vehicle bottom longitudinal beam (3), and the locking piece (5) passes through the locking slot (11) and the turnover locking hole (32), so as to realize the locking after turnover of movable support (1). The movable support (1) has a main driving arm (12) and a driven arm (13) arranged in a vertical state;The hinged shaft (2) passes through the end position of the main driving arm (12) away from the driven arm (13) in the length direction, and the hinged shaft (2) is rotatably connected with the main driving arm (12);The pedal piece (4) is connected to the end position of the driven arm (13) away from the main driving arm (12) in the length direction;And at least one movable support locking hole (14) is opened in the main driving arm (12), when the movable support (1) is unfolded to the horizontal use position, the movable support locking hole (14) can move to the position corresponding to the turnover locking hole (32) on the vehicle bottom longitudinal beam (3), by inserting the connecting piece in the movable support locking hole (14) and the turnover locking hole (32), the firm locking between the movable support (1) and the vehicle bottom longitudinal beam (3) is realized.

2. The folding step device for a vehicle according to claim 1, characterized by: A movable support sector plate (15) is formed on the main driving arm (12) of the movable support (1) and at the position corresponding to one side of the vehicle bottom longitudinal beam (3), and the locking slot (11) is opened in the movable support sector plate (15).

3. The folding step device for a vehicle according to claim 2, wherein: A buffer block (16) extending towards the vehicle bottom longitudinal beam (3) is formed on the movable support (1) and at the position corresponding to the connection between the main driving arm (12) and the driven arm (13), and a soft buffer pad (161) is fixedly installed on the buffer block (16), when the movable support (1) is unfolded to the horizontal use position, the soft buffer pad (161) abuts against the bottom of the vehicle bottom longitudinal beam (3), thereby playing the role of shock absorption.

4. The folding step device for a vehicle according to claim 2, characterized in that: ​ 5. The folding step device for a vehicle according to claim 1, characterized in that: A damping sleeve (21) is sleeved on the hinge shaft (2) to reduce the impact force when the movable support (1) is overturned.

6. The folding step device for a vehicle according to claim 1, wherein: The edge of the tread surface of the pedal member (4) is bent downward to form a protective side (41), and the tread surface of the pedal member (4) is provided with anti-skid protrusions.

7. The folding step device for a vehicle according to claim 1, wherein: The pedal member (4) is made of aluminum alloy by extrusion forming, and the surface thereof is treated by anodic oxidation.

8. The folding step device for a vehicle according to claim 1, characterized in that: The locking member (5) is one of a bolt, a screw or a buckle.

9. The folding step device for a vehicle as set forth in claim 1, wherein: The movable support (1) is of an integral structure.

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