CN210338053U

CN210338053U - Vehicle body structure with adjustable wheel track and gravity center height

Info

Publication number: CN210338053U
Application number: CN201921182146.7U
Authority: CN
Inventors: 李秉宪; 李伟湛
Original assignee: Chongqing Jiaotong University
Current assignee: Chongqing Jiaotong University
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-17
Anticipated expiration: 2029-07-25

Abstract

The utility model provides a body structure with adjustable wheel base and center of gravity height, comprising a frame assembly, a front wheel assembly, a rear wheel assembly, two swing arm assemblies and two support arm assemblies, two swing arm assemblies at both ends They are respectively hinged between the frame assembly and the front wheel assembly and between the frame assembly and the rear wheel assembly. Two fixed rotating shafts are fixed on the frame assembly, and one end of the two swing arm assemblies is in one-to-one correspondence with the two fixed rotating shafts. The two support arm assemblies are respectively connected to the swing arm assembly in a one-to-one correspondence, and the support arm assemblies are also respectively connected with driving members for driving the swing arm assembly to rotate around the hinge shaft of the drive swing arm assembly and the frame assembly. . The utility model can realize the adjustment of the front and rear wheelbases and the height of the center of gravity of the vehicle body. Therefore, when walking on a pothole road, the height of the center of gravity of the vehicle body can be raised to effectively avoid scratches between the bottom of the vehicle body and the pothole road surface. On flat roads or slopes, the center of gravity can be lowered to make the body more stable to avoid tipping accidents.

Description

Vehicle body structure with adjustable wheel track and gravity center height

Technical Field

The utility model relates to a transport means field especially relates to the automobile body structure of transport means such as electronic wheelchair that supplies the handicapped personage to go on a journey.

Background

The electric wheelchair is formed by superposing a high-performance energy power driving device, an intelligent operating device, a battery and the like on the basis of the traditional manual wheelchair and is formed by modification and upgrading. The electric wheelchair has lower cost, lighter weight and very convenient operation and control, and becomes a preferred tool for people with inconvenient actions to go out. Because people often return to steps, climbing or even hollow road sections when going out, although some electric wheelchairs have the function of climbing steps, the safety and the flexibility are unsatisfactory. Because the electric wheelchairs are limited in size and flexibility and cannot adopt a longer wheelbase, the vertical projection distance of the wheelbase is reduced due to large inclination when climbing steps, and the gravity center of the electric wheelchairs is higher, so that a rollover accident is easy to happen.

To this end, patent document CN102824252A discloses a variable wheel base frame, which is divided into a front frame and a rear frame, wherein the front frame is provided with front wheels, the rear frame is provided with rear wheels, the front frame and the rear frame are hinged together, a frame driving device is arranged between the front frame and the rear frame, a retainer is hinged on the rear shaft, a universal wheel bracket is hinged on the retainer, the universal wheel driving device is arranged between the retainer and the universal wheel bracket, and retaining rods are respectively hinged on the retainer and the front frame. Although the wheel base of the front wheel and the rear wheel is variable, the electric wheelchair can use different wheel bases when different needs are needed, the adjustment of the gravity center height of the vehicle body cannot be effectively realized, and accordingly the trafficability is poor and the electric wheelchair cannot be effectively applied to uneven road surfaces.

SUMMERY OF THE UTILITY MODEL

To the not enough that exists among the prior art, the utility model provides a wheel base and focus height-adjustable's body structure, it has solved the problem that the automobile body focus height can't be adjusted among the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a wheel base and centre of gravity height-adjustable's body structure, includes frame subassembly, front wheel subassembly and rear wheel subassembly, wherein:

the two ends of the two swing arm assemblies are respectively hinged between the frame assembly and the front wheel assembly and between the frame assembly and the rear wheel assembly, two fixed rotating shafts are fixed on the frame assembly, and one ends of the two swing arm assemblies are respectively hinged with the two fixed rotating shafts in a one-to-one correspondence manner;

the two support arm assemblies are respectively connected to the swing arm assemblies in a one-to-one correspondence mode, and the support arm assemblies are further respectively connected with driving pieces for driving the swing arm assemblies to rotate around the hinged shafts of the driving swing arm assemblies and the frame assemblies.

The principle of the utility model is that: when the vehicle needs to pass through a bumpy road section, the front wheel assembly and the rear wheel assembly can be controlled to be relatively folded through the two swing arm assemblies, so that the front and rear wheel distances are shortened, and the height of the vehicle body can be raised; when the bicycle runs on a flat road or passes through a section with slope, the front wheel assembly and the rear wheel assembly can be controlled to be unfolded back to back through the two swing arm assemblies, so that the front and rear wheel distances are increased, and the height of the gravity center of the bicycle body is reduced.

Compared with the prior art, the utility model discloses following beneficial effect has: through the motion of two arm subassemblies of driving piece drive, and then control two swing arm subassemblies and expand mutually or draw in relatively, can realize the regulation to wheelbase and the regulation of automobile body focus height, consequently the accessible is raised the automobile body focus height and is effectively avoided automobile body bottom and hollow road surface to produce the scraping when walking in hollow road surface, and can reduce the focus when walking in level road or sloping ground and make the automobile body more steady in order to avoid the accident of tumbleing.

Drawings

Fig. 1 is a schematic diagram of the utility model in the vehicle body lifting state.

Fig. 2 is a schematic view of the present invention in a state where the vehicle body is lowered.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 1 and 2, the utility model provides a wheel base and centre of gravity height-adjustable's body structure, including frame subassembly 1, front wheel subassembly, rear wheel subassembly, two swing arm subassemblies 3 and two support arm subassemblies 5, wherein:

the frame component 1 is provided with two fixed rotating shafts 2 which are symmetrically arranged in front and back, wherein the two fixed rotating shafts 2 can be fixed on the frame component 1 in a welding or bolt fixing mode or can be rotatably arranged on the frame component 1 through a bearing; wherein, the frame component 1 with any shape and structure can be adopted by the technicians in the field according to the needs, therefore, the specific structure is not described in detail herein;

the front wheel assembly comprises a front wheel shaft 81 and a front wheel 8, and the rear wheel 9 assembly comprises a rear wheel shaft 91 and a rear wheel 9;

two ends of the two swing arm assemblies 3 are respectively hinged between the frame assembly 1 and the front wheel 8 assembly and between the frame assembly 1 and the rear wheel 9 assembly, specifically, one ends of the two swing arm assemblies 3 are respectively hinged with the two fixed rotating shafts 2 in a one-to-one correspondence manner, so that the swing arm assemblies 3 can freely rotate around the corresponding fixed rotating shafts 2; the other ends of the two swing arm assemblies 3 are respectively connected with the front wheel shaft 81 and the rear wheel shaft 91, specifically, for example, in a rear-drive electric wheelchair, since the rear wheel 9 is a driving wheel, the rear wheel 9 and the rear wheel shaft 91 are fixedly connected, and the rear wheel shaft 91 needs to be connected with a driving motor mechanism (not shown in the figure), the swing arm assembly 3 corresponding to the rear wheel 9 assembly can be directly rotatably connected with the rear wheel shaft 91 through a bearing, and the driving motor mechanism driving the rear wheel shaft 91 can also be directly fixed on the swing arm assembly 3; the front wheel 8 is rotatably connected with a front wheel shaft 81, the front wheel shaft 81 is connected with the other swing arm component 3 through a steering mechanism, and the driving motor mechanism and the steering mechanism can adopt the structures in the prior art, so that redundant description is omitted;

the two swing arm assemblies 3 are also respectively provided with a first movable rotating shaft 4, and specifically, the first movable rotating shafts 4 can be fixed on the swing arm assemblies 3 in a welding or bolt fixing mode, or can be rotatably arranged on the swing arm assemblies 3 through bearings;

the two support arm assemblies 5 are respectively connected to the swing arm assemblies 3 in a one-to-one correspondence manner, and the support arm assemblies 5 are also respectively connected with a telescopic driving piece for driving the swing arm assemblies 3 to rotate around the hinged shafts of the driving swing arm assemblies 3 and the frame assembly 1; specifically, one end of the support arm assembly 5 is hinged to the swing arm assembly 3 through a first movable rotating shaft 4, and the other end of the support arm assembly is hinged to the output end of the telescopic driving piece through a second movable rotating shaft 6; preferably, the telescopic driving member is a telescopic mechanism such as a telescopic motor, and two ends of the telescopic driving member are respectively hinged with the two support arm assemblies 5 through the first rotating shaft 4.

As shown in fig. 2, when walking on a flat road or climbing a slope, a passenger controls the extension motor to extend, the two second rotating shafts 6 move back to back and drive the two swing arm assemblies 3 to unfold back to back through the two support arm assemblies 5, the opening angle between the two support arm assemblies 5 is increased, the height of the frame assembly 1 is reduced to H2, so that the electric wheelchair can walk more stably, and the probability of tipping can be reduced because the distance between the front wheel and the rear wheel is increased to L2; as shown in fig. 1, when walking on a rough road, a passenger controls the telescopic motor to contract, so that the two second rotating shafts 6 are relatively close to each other and the opening angle between the two swing arm assemblies 3 is reduced by the two support arm assemblies 5, the front and rear wheel distances are reduced to L1, the height of the frame assembly 1 is increased to H1, and the bottom of the frame assembly 1 is prevented from being scratched by the road when passing through the rough road.

Preferably, the frame assembly 1 is further provided with a chute 11, the chute 11 may be a whole-segment arc structure or a linear structure, or may be a multi-segment concentric arc structure or a multi-segment linear structure which are discontinuously arranged, and the two second rotating shafts 6 of the two support arm assemblies 5 are respectively slidably mounted in the chute 11; because the two second movable rotating shafts 6 are limited in the sliding grooves 11, the problem that the vehicle body is easy to incline due to instability of a quadrangle formed by connecting the two fixed rotating shafts 2 and the two second movable rotating shafts 6 can be avoided.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a wheel base and focus height-adjustable's body structure, includes frame subassembly, front wheel subassembly and rear wheel subassembly, its characterized in that:

the two swing arm assemblies are respectively connected between the frame assembly and the front wheel assembly and between the frame assembly and the rear wheel assembly, two fixed rotating shafts are fixed on the frame assembly, and one ends of the two swing arm assemblies are respectively hinged with the two fixed rotating shafts in a one-to-one correspondence manner;

the two support arm assemblies are respectively connected to the swing arm assemblies in a one-to-one correspondence mode, and the support arm assemblies are further respectively connected with a telescopic driving piece for driving the swing arm assemblies to rotate around the hinged shafts of the driving swing arm assemblies and the frame assemblies.

2. The vehicle body structure with adjustable track and gravity center height according to claim 1, characterized in that: one end of the support arm assembly is hinged to the swing arm assembly through a first movable rotating shaft, and the other end of the support arm assembly is hinged to the output end of the telescopic driving piece through a second movable rotating shaft.

3. The vehicle body structure adjustable in track width and center of gravity height as claimed in claim 2, wherein: the telescopic driving piece is of a telescopic structure, and two ends of the telescopic driving piece are respectively connected with a second movable rotating shaft to be respectively hinged with the two support arm assemblies.

4. The vehicle body structure adjustable in track width and center of gravity height as claimed in claim 2, wherein: the frame component is provided with a sliding groove, and the two second movable rotating shafts of the two support arm components are slidably arranged in the sliding groove respectively.