CN219467532U

CN219467532U - Structure for multidirectional running and steering of four-wheel vehicle

Info

Publication number: CN219467532U
Application number: CN202320182759.0U
Authority: CN
Inventors: 黄一峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-08-04
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a structure for multidirectional running and steering of a four-wheel vehicle, which comprises a frame and an installing frame, wherein the installing frame comprises a frame body and a frame body, wherein the frame body comprises a frame body and a frame body, and the frame body comprises a frame body and a frame body, wherein the frame body comprises a frame body and a frame base: the first transmission part and the second transmission part are used for mounting and transmitting and are fixedly arranged on the frame; a first transmission part: the power transmission device is used for transmitting driving power and is arranged on the mounting frame in a switching way; the second transmission part is used for transmitting steering power and is arranged on the mounting frame in a switching way; third transmission part: the steering device is used for simultaneously transmitting driving power and steering power and is arranged on the first transmission part and the second transmission part in a switching way; fourth transmission part: the third transmission part is used for transmitting driving power and is arranged below the third transmission part in a switching way; and (2) a mounting seat: the fourth transmission part is used for installing and is connected with the mounting frame through the shock absorber; the mounting frame is provided with a driving power input rotating shaft which is connected with the first transmission part, and a steering power input rotating shaft which is connected with the second transmission part; a driving power output shaft is arranged on the fourth transmission part; the defect that the large-angle steering cannot be realized by matching of an automobile running steering system in the prior art is overcome.

Description

Structure for multidirectional running and steering of four-wheel vehicle

Technical Field

The utility model relates to the technical field of automobile equipment, in particular to a structure for multidirectional running and steering of a four-wheel vehicle.

Background

In the power system of an automobile, there are two key systems, namely a running power system and a steering power system. The running power system is powered by the engine, and then the power is transmitted to the hub through the speed change and transmission mechanism to drive the wheels to rotate, so that the automobile body is driven to run forwards. The steering power system is used for manually controlling the rotation of the steering wheel and then transmitting power to the steering pull rod through the transmission mechanism to pull the wheels to steer. The driving power system of the automobile is divided into a front driving power system, a rear driving power system and a four driving power system according to a driving mode, and the requirements of no mutual influence of the front driving power system and the rear driving power system are met when the driving power system is matched with a steering power system. In the prior art, a well-established running power system and a steering power system are matched, but the existing running power system and the steering power system have dead points in the use process, so that steering at a large angle in the running process cannot be realized, and the steering is limited by the structural characteristics of a running structure and a steering structure. In some special requirements and workplaces, the transverse movement, steering and turning around are required to be realized in a small range, even the in-situ turning around is realized, and the existing automobile driving and steering structure cannot be realized.

Disclosure of Invention

The utility model aims to overcome the defect that the matching of an automobile driving steering system in the prior art cannot realize large-angle steering, and provides a structure for multi-directional driving and steering of a four-wheel vehicle.

The aim of the utility model is achieved by the following technical scheme: a structure for four-wheel vehicle diversified travel and turn to includes the frame, still includes the mounting bracket: the first transmission part and the second transmission part are used for mounting and transmitting and are fixedly arranged on the frame; a first transmission part: the power transmission device is used for transmitting driving power and is arranged on the mounting frame in a switching way; the second transmission part is used for transmitting steering power and is arranged on the mounting frame in a switching way; third transmission part: the steering device is used for simultaneously transmitting driving power and steering power and is arranged on the first transmission part and the second transmission part in a switching way; fourth transmission part: the third transmission part is used for transmitting driving power and is arranged below the third transmission part in a switching way; gear box base: the fourth transmission part is used for installing and is connected with the mounting frame through the shock absorber; the mounting frame is provided with a driving power input rotating shaft which is connected with the first transmission part, and a steering power input rotating shaft which is connected with the second transmission part; the fourth transmission part is provided with a traveling power output shaft.

Preferably, the mounting frame is an inverted U-shaped frame body, and a shock absorber mounting part for mounting the shock absorber is arranged at the top of the mounting frame; the first transmission part is arranged on the U-shaped inner part of the mounting frame in a switching way through the first transmission shaft; the second transmission part is arranged on the U-shaped inner part of the mounting frame in a switching way through a second transmission shaft; the first transmission shaft and the second transmission shaft are arranged in parallel.

Preferably, the first transmission part is a gear box, a third transmission shaft is arranged in the gear box in a switching way, the third transmission shaft is connected with the first transmission shaft through a bevel gear, and the first transmission shaft is connected with a driving power input rotating shaft; the second transmission part is arranged as a gear box, a fifth transmission shaft is arranged in the gear box in a switching way, the fifth transmission shaft is connected with the second transmission shaft through a bevel gear, and the second transmission shaft is connected with a steering power input rotating shaft.

Preferably, the third transmission part is a gear box, the inner part of the third transmission part is divided into an upper part and a lower part, and the upper part of the third transmission part is connected with the first transmission part through a fourth transmission shaft; the lower part of the third transmission part is connected with the second transmission part through a sixth transmission shaft; the fourth transmission shaft is connected with the third transmission shaft through a bevel gear; the sixth transmission shaft is connected with the fifth transmission shaft through a bevel gear.

Preferably, an eighth transmission shaft is arranged in the third transmission part in a transfer way, and the upper part of the eighth transmission shaft is in a transfer way with the fourth transmission shaft through a bevel gear; the bottom of the eighth transmission shaft extends out of the third transmission part and is connected to the gear box seat in a switching way; the lower part of the eighth transmission shaft is provided with a rotating sleeve in a switching way, and a bevel gear is arranged on the rotating sleeve and connected with the sixth transmission shaft through the bevel gear; the bottom of the rotating sleeve extends out of the three transmission parts and the gear box seat and is connected with a connecting flange, and the connecting flange is fixedly connected with the fourth transmission part.

Preferably, the fourth transmission part is provided as a gear box, and the eighth transmission shaft is connected in the fourth transmission part in a switching way and is connected with the driving power output shaft through a bevel gear.

Preferably, the gear box seat is arranged as a U-shaped seat, the gear box seat is connected in the gear box seat through an eighth transmission shaft, and a shock absorber gear box seat for installing a shock absorber is arranged on the outer side of the gear box seat.

Preferably, a ninth transmission shaft is arranged at the upper part of the inner part of the third transmission part in a switching way, and the ninth transmission shaft is respectively connected with the fourth transmission shaft and the eighth transmission shaft through bevel gears; and a tenth transmission shaft is arranged at the lower part of the inner part of the third transmission part in a switching way, and the tenth transmission shaft is respectively connected with the rotating sleeve and the sixth transmission shaft through bevel gears.

Preferably, a connecting frame is arranged on one side of the mounting frame in a switching manner, and the connecting frame is respectively connected on one side of the third transmission part in a switching manner through the fourth transmission shaft and the sixth transmission shaft.

Preferably, a fifth gear box is arranged on the mounting frame, a fourth gear box is arranged at the lower part of the mounting frame, and the first transmission shaft is connected in the fourth gear box in a switching way; the second transmission shaft is connected in the fifth gear box in a switching way; the driving power input rotating shaft is connected to the fifth gear box, and the steering power input rotating shaft is connected to the fourth gear box.

The utility model has the following advantages: the utility model adopts a brand new driving power transmission and a rotating power transmission, and the combined use of the driving power transmission and the rotating power transmission is a brand new connecting structure, so that the dead point of steering in the existing vehicle driving process can be eliminated, at least 180 degrees of steering can be realized, the driving power output can not be influenced, and the defect that the large-angle steering can not be realized by the matching of an automobile driving steering system in the prior art is overcome; the structure can realize the functions of transversely moving, turning and turning around in a small range, and even turning around in situ, and can adapt to the escape under various complex environment road conditions.

Drawings

Fig. 1 is a schematic view of the transmission mechanism of the present utility model.

FIG. 2 is a schematic diagram of the structure of the present utility model.

FIG. 3 is a sectional view of the utility model in A-A steps.

FIG. 4 is a B-B cross-sectional view of the present utility model.

FIG. 5 is a C-C cross-sectional view of the present utility model.

FIG. 6 is a D-D sectional view of the present utility model.

In the figure, a frame (1), a driving power input rotating shaft (23), a steering power input rotating shaft (24), a mounting frame (2), a first transmission shaft (21), a second transmission shaft (22), a shock absorber mounting part (3), a shock absorber (4), a gear box seat (5), a first transmission part (6), a third transmission shaft (61), a fourth transmission shaft (62), a second transmission part (7), a fifth transmission shaft (71), a sixth transmission shaft (72), a third transmission part (8), an eighth transmission shaft (81), a ninth transmission shaft (82), a tenth transmission shaft (83), a second gear box (9), a driving power output shaft (10), a connecting flange (11), a connecting frame (12), a rotating sleeve (13), a fourth gear box (14) and a fifth gear box (15).

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters designate like items in the following figures, and thus, once an item is defined in one figure, it is not necessary to define and explain it preferentially in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The structure for multidirectional running and steering of the four-wheel vehicle is shown in the figure, and comprises an original frame 1, the frame can be redesigned, the device is particularly improved in that a brand-new running transmission and steering transmission linkage mechanism of the four-wheel vehicle is provided to realize functions of in-situ turning, oblique running, transverse movement and the like of the vehicle, the whole technical scheme is finished by adopting mechanical structural design in the whole process, the reliability of technical use is ensured to the greatest extent, and the structure can be finished by adopting other auxiliary power systems in an auxiliary mode, so that the structure is not only applicable to mechanical transmission structures, but also applicable to other power auxiliary running and steering transmission. Specifically, the structure also comprises other transmission components. The method comprises the following steps: and (2) a mounting frame: the first transmission part 6 and the second transmission part 7 are used for mounting and transmitting, are fixedly arranged on the frame 1, can be fixed on the frame 1 in a welding mode, and can also be fixedly connected on the frame 1 by adopting a detachable bolt structure, and the selection is carried out according to actual vehicle types and vehicle running requirements. First transmission part 6: for driving power transmission, the adapter is arranged on the mounting frame 2, and the function of the adapter is to transmit the power which is started to be output. Second transmission portion 7: the steering power transmission device is used for steering power transmission, is arranged on the mounting frame 2 in a switching way, and has the function of transmitting power for steering wheel rotation, and only basic steering transmission is disclosed in the attached drawings of the embodiment. Third transmission part 8: the main point of the present structure is that the third transmission portion 8 is used for transmitting driving power and steering power simultaneously, and most importantly, driving power and steering power are transmitted simultaneously, so that the power output of steering power does not influence the output of driving power in the process of driving power transmission of a vehicle, especially, the steering direction of the present application is at least between 90 degrees and 180 degrees, the existing steering structure cannot reach the steering angle, and the present structure can overcome the dead point of the existing structure, thereby achieving free driving transmission and rotation transmission. Specifically, the third transmission part 8 is simultaneously and transitionally arranged on the first transmission part 6 and the second transmission part 7. Fourth transmission part 9: the transmission device is used for transmitting running power, is arranged below the third transmission part 8 in a switching way, is actually the transmission end of the power, and is provided with a running power output shaft 10 on the fourth transmission part 9, and the running power can be converted into running by installing wheels on the power output shaft 10. Gear box base 5: is used for installing a fourth transmission part 9 and is connected with the mounting frame 2 through the shock absorber 4. In the whole structure, the function of supporting and damping is also considered, and the structure is supported and damped by the shock absorber 4 anyway. Of course, the gear box seat 5 is also used for installing other components, such as a brake system, etc., and of course, the systems also need to be redesigned, and the present device is not required to be protected in the present application, and the driving power input rotating shaft 23 is arranged on the mounting frame 2 and connected with the first transmission part 6 for inputting power; a steering power input shaft 24 is provided to connect the input of power to the second transmission portion 7. In this structure, power is input on the mounting frame 2, the power is supplied by the engine, and then, the power is input by being connected with the corresponding input rotating shaft after being regulated by other power transmission structures and corresponding gearboxes.

In another embodiment, the present application provides at least one specific structure of the mounting frame 2, wherein one structure is that the mounting frame is an inverted U-shaped frame body, an opening is downwards mounted on the frame 1, a shock absorber mounting part 3 for mounting a shock absorber 4 is arranged at the top of the mounting frame, and then a first transmission part 6 is transitionally arranged on the U-shaped inner part of the mounting frame 2 through a first transmission shaft 21; the second transmission part 7 is arranged on the U-shaped inner part of the mounting frame 2 in a switching way through the second transmission shaft 22; the first transmission shaft 21 and the second transmission shaft 22 are arranged in parallel up and down. Thus, the first transmission part 6 and the second transmission part 7 can rotate in the mounting frame 2 by a certain amplitude through the rotating shaft. The other structure adopts a groove type, and the first transmission shaft 21 and the second transmission shaft 22 are connected in the groove through the rotating shaft, so that the tail protection performance on the first transmission shaft 21 and the second transmission shaft 22 is better. Of course, the other mounting frame 2 may be any structure capable of connecting the first transmission shaft 21 and the second transmission shaft 22 to each other through the rotation shaft.

In another embodiment, the present structure provides at least one first transmission 6 and a second transmission 7. In the present embodiment, the first transmission unit 6 is provided as a gear box which is provided in a long cylindrical shape, and then a third transmission shaft 61 is provided inside the gear box in a transfer manner, and the third transmission shaft 61 is connected to the first transmission shaft 21 through a bevel gear for transmitting power. In the present embodiment, one transmission mode is to connect the first transmission shaft 21 with the running power input rotation shaft 23; another way is to directly connect the first transmission shaft 21 as a running power input shaft to another power output shaft such as a transmission case. Similarly, since the first transmission shaft 21 and the second transmission shaft 22 are disposed in parallel up and down, the second transmission portion 7 is also provided as a gear box, and is also provided in a long cylindrical shape, and then the fifth transmission shaft 71 is provided inside the gear box in a transfer manner, and the fifth transmission shaft 71 is connected to the second transmission shaft 22 through a bevel gear. Also, in the present embodiment, one transmission is to connect the second transmission shaft 22 with the steering power input shaft 24; another way is to directly use the second drive shaft 22 as a steering power input shaft directly and then connect it to the reversing disc through another power transmission mechanism. In the device, the other structure of the first transmission part 6 and the second transmission part 7 is a dumbbell-shaped box body, the two ends of the box body are gear boxes, and the middle of the box body is a column body for connection and support, so that materials are saved more.

In another embodiment, a specific third transmission part 8 is provided. The third transmission part 8 is arranged as a gear box, the inner part of the third transmission part 8 is divided into an upper part and a lower part, the middle part can be separated by a plate, and the upper part of the third transmission part 8 is in switching connection with the first transmission part 6 through the fourth transmission shaft 62 for power transmission. The lower part of the third transmission part 8 is connected with the second transmission part 7 through a sixth transmission shaft 72 for power transmission. The fourth transmission shaft 62 is connected with the third transmission shaft 61 through a bevel gear; the sixth transmission shaft 72 is connected to the fifth transmission shaft 71 through a bevel gear. In this embodiment, since the first transmission part 6 and the second transmission part 7 are disposed in parallel up and down and are disposed in a switching manner on the mounting frame 2, the third transmission part 8 is also connected with the first transmission part and can rotate, thus forming a parallelogram, which can move up and down relatively, i.e. to facilitate shock absorption and avoid the problem of jamming.

In another embodiment, an eighth transmission shaft 81 is rotatably disposed in the third transmission portion 8 to transmit power, and an upper portion of the eighth transmission shaft 81 is rotatably disposed in the fourth transmission shaft 62 to transmit driving power through a bevel gear. The bottom of the eighth transmission shaft 81 extends out of the third transmission part 8 and is connected to the gear box seat 5 in a switching way to provide another support for the whole third transmission part 8; the lower part of the eighth transmission shaft 81 is connected with a rotating sleeve 13, a bevel gear is arranged on the rotating sleeve 13 and is connected with the sixth transmission shaft 72 through the bevel gear to transmit steering power, the bottom of the rotating sleeve 13 extends out of the third transmission part 8 and the gear box seat 5 and is connected with a connecting flange 11, and the connecting flange 11 is fixedly connected with the fourth transmission part 9. In this way, the third transmission portion 8 can simultaneously provide the power output for running and the power output for steering. Finally, the fourth transmission part 9 is provided as a gearbox, and the eighth transmission shaft 81 is connected in the fourth transmission part 9 and connected with the driving power output shaft 10 through a bevel gear.

In another embodiment, a gear box seat 5 is provided, the gear box seat 5 is configured as a U-shaped seat, the gear box seat 5 is connected in the gear box seat 5 through an eighth transmission shaft 81, and a shock absorber mounting seat for mounting the shock absorber 4 is arranged on the outer side of the gear box seat 5. Such a mounting can provide at least 180 degrees of steering room for the fourth transmission part 9. Another gear box seat 5 capable of providing 360-degree steering space is that the gear box seat 5 is L-shaped, one end of the gear box seat 5 can be connected with the third transmission part 8, and the lower part of the gear box seat 5 is completely left empty, so that the fourth transmission part 9 can rotate at any angle below the gear box seat 5.

In another embodiment, for regulating and controlling the square rotation direction and dispersing supporting force, a ninth transmission shaft 82 is arranged at the upper part of the inside of the third transmission part 8 in a switching way, and the ninth transmission shaft 82 is respectively connected with the fourth transmission shaft 62 and the eighth transmission shaft 81 through bevel gears; a tenth transmission shaft 83 is provided at the inner lower portion of the third transmission portion 8 in a switching manner, and the tenth transmission shaft 83 is connected to the rotation sleeve 13 and the sixth transmission shaft 72 through bevel gears, respectively.

In another embodiment, in order to facilitate the stress symmetry of the whole structure, a connecting frame 12 is arranged at one side of the mounting frame 2 in a switching manner, and the connecting frame 12 is respectively connected at one side of the third transmission part 8 in a switching manner through a fourth transmission shaft 62 and a sixth transmission shaft 72.

In another embodiment, the structure can be applied to a single front drive or a rear drive, or can be used with a four-wheel drive, and when the structure is used for the four-wheel drive, a fifth gear box 15 is arranged on the mounting frame 2, a fourth gear box 14 is arranged at the lower part of the mounting frame 2, and the first transmission shaft 21 is connected in the fourth gear box 14 in a switching way; the second transmission shaft 22 is connected in the fifth gear box 15 in a switching way; the running power input shaft 23 is connected to the fifth gear case 15, and the steering power input shaft 24 is connected to the fourth gear case 14. Therefore, the two power input shafts can be turned through the two gear boxes, and then the front and rear sets of structures are connected through the transmission shafts through the other turning gear boxes arranged on the frame, so that the four-wheel drive of the engine can drive running and steering simultaneously.

In this application, the rotational positions of the shaft connection are all provided with bearings, which are not shown in the drawings of the specification, and the prior art is not described in this application one by one when the bearings are adopted for auxiliary rotation, but cannot be understood that the rotational positions of the application are not adopted for auxiliary rotation. Meanwhile, the gear box of the present application should not be construed as a completely hollow gear box as the attached drawings are described, but the gear box arranged according to the characteristics of gear transmission should belong to the protection scope of the gear box of the present application. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the device, the steering mechanism of the front axle and the rear axle of the vehicle is connected by a conventional steering mechanism of the vehicle, and the steering mechanism is provided with two output shafts and an input shaft. The input shaft is connected with the steering wheel. The two output shafts are respectively connected with the steering mechanisms of the front axle and the rear axle, namely the steering power input rotating shaft 24 of the application, so that front and rear simultaneous steering can be realized. The direction control method of the device is that the direction control mechanism is provided with four gears, and then the direction control mechanism is converted into the four gears through a gear changing mechanism structure, such as a gear shifting structure of an automobile. The first gear is used for controlling the two output shafts to work in the same direction, the front axle two wheels rotate in the same direction, the rear axle two wheels rotate in the same direction, but the front axle two wheels and the rear axle two wheels turn in opposite directions, so that the functions of controlling the vehicle to normally advance, retreat and turn around in situ are used. When the road conditions of the complex environment are met, two gears can be used, two output shafts of the control box work reversely, the front axle and the rear axle are the same in four-wheel steering, and the functions of vehicle tilting and transverse movement are used. On a war chariot or a special vehicle, three gears and four gears can be configured, and the three gears realize locking of a rear axle output shaft of a steering control box and only work front axle steering control (front direction control). The four gears realize locking of the front axle output shaft of the steering control box, and only the rear axle steering control (rear direction control) works. The function can make the vehicle get rid of the trouble easily in the complex road condition environment. However, in the case of gear shifting, it is necessary to perform the shift in a stationary state of the vehicle for safety. And the functions of vehicle in-situ turning, tilting and transverse movement can be effectively used only in low-speed gears.

The suspension power transmission method of the structure is to complete the transmission function by adopting three sets of differentials, wherein one end output shaft of a first set of differential rotates to the input end of a second set of differential and is responsible for the two-wheel driving of a front axle. The output shaft at the other end of the first differential mechanism rotates to the input end of the third differential mechanism and is responsible for driving two wheels of the rear axle.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a structure for four-wheel vehicle dives and turns to, includes frame (1), its characterized in that: still include mounting bracket (2): the first transmission part (6) and the second transmission part (7) are used for mounting and transmitting, and are fixedly arranged on the frame (1); first transmission part (6): the power transmission device is used for transmitting driving power and is arranged on the mounting frame (2) in a switching way; the second transmission part (7) is used for steering power transmission and is arranged on the mounting frame (2) in a switching way; third transmission part (8): the steering device is used for simultaneously transmitting driving power and steering power and is arranged on the first transmission part (6) and the second transmission part (7) in a switching way; fourth transmission part (9): the transmission device is used for transmitting driving power and is arranged below the third transmission part (8) in a switching way; gear box seat (5): the fourth transmission part (9) is used for mounting and is connected with the mounting frame (2) through the shock absorber (4); a driving power input rotating shaft (23) is arranged on the mounting frame (2) and connected with the first transmission part (6), and a steering power input rotating shaft (24) is arranged and connected with the second transmission part (7); a traveling power output shaft (10) is provided in the fourth transmission unit (9).

2. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1, wherein: the mounting frame (2) is an inverted U-shaped frame body, and a shock absorber mounting part (3) for mounting a shock absorber (4) is arranged at the top of the mounting frame; the first transmission part (6) is arranged on the U-shaped inner part of the mounting frame (2) in a switching way through the first transmission shaft (21); the second transmission part (7) is arranged on the U-shaped inner part of the mounting frame (2) in a switching way through a second transmission shaft (22); the first transmission shaft (21) and the second transmission shaft (22) are arranged in parallel.

3. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1 or 2, characterized in that: the first transmission part (6) is arranged as a gear box, a third transmission shaft (61) is arranged in the gear box in a switching way, the third transmission shaft (61) is connected with the first transmission shaft (21) through a bevel gear, and the first transmission shaft (21) is connected with the driving power input rotating shaft (23); the second transmission part (7) is arranged as a gear box, a fifth transmission shaft (71) is arranged in the gear box in a switching way, the fifth transmission shaft (71) is connected with the second transmission shaft (22) through a bevel gear, and the second transmission shaft (22) is connected with the steering power input rotating shaft (24).

4. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1, wherein: the third transmission part (8) is arranged as a gear box, the inner part of the third transmission part (8) is divided into an upper part and a lower part, and the upper part of the third transmission part (8) is connected with the first transmission part (6) in a switching way through a fourth transmission shaft (62); the lower part of the third transmission part (8) is connected with the second transmission part (7) through a sixth transmission shaft (72); the fourth transmission shaft (62) is connected with the third transmission shaft (61) through a bevel gear; the sixth transmission shaft (72) is connected with the fifth transmission shaft (71) through a bevel gear.

5. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1 or 4, characterized in that: an eighth transmission shaft (81) is arranged in the third transmission part (8) in a rotating way, and the upper part of the eighth transmission shaft (81) is in a rotating way with the fourth transmission shaft (62) through a bevel gear; the bottom of the eighth transmission shaft (81) extends out of the third transmission part (8) and is connected to the gear box seat (5) in a switching way; a rotary sleeve (13) is arranged at the lower part of the eighth transmission shaft (81) in a switching way, and a bevel gear is arranged on the rotary sleeve (13) and is connected with the sixth transmission shaft (72) through the bevel gear; the bottom of the rotating sleeve (13) extends out of the third transmission part (8) and the gear box seat (5) and is connected with a connecting flange (11), and the connecting flange (11) is fixedly connected with the fourth transmission part (9).

6. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 5, wherein: the fourth transmission part (9) is provided as a gear box, and the eighth transmission shaft (81) is connected in the fourth transmission part (9) in a switching way and is connected with the driving power output shaft (10) through a bevel gear.

7. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1, wherein: the gear box seat (5) is arranged to be a U-shaped seat, the gear box seat (5) is connected in the gear box seat (5) through an eighth transmission shaft (81), and a shock absorber mounting seat for mounting the shock absorber (4) is arranged on the outer side of the gear box seat (5).

8. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1, wherein: a ninth transmission shaft (82) is arranged at the upper part of the inside of the third transmission part (8) in a switching way, and the ninth transmission shaft (82) is respectively connected with the fourth transmission shaft (62) and the eighth transmission shaft (81) through bevel gears; a tenth transmission shaft (83) is arranged at the lower part of the inside of the third transmission part (8) in a switching way, and the tenth transmission shaft (83) is respectively connected with the rotary sleeve (13) and the sixth transmission shaft (72) through bevel gears.

9. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1, wherein: one side of the mounting frame (2) is connected with a connecting frame (12), and the connecting frame (12) is connected with one side of the third transmission part (8) through a fourth transmission shaft (62) and a sixth transmission shaft (72) respectively.

10. A structure for multi-directional traveling and steering of a four-wheeled vehicle according to claim 1, wherein: a fifth gear box (15) is arranged on the mounting frame (2), a fourth gear box (14) is arranged at the lower part of the mounting frame (2), and a first transmission shaft (21) is connected in the fourth gear box (14) in a switching way; the second transmission shaft (22) is connected in the fifth gear box (15); the driving power input rotating shaft (23) is connected to the fifth gear box (15), and the steering power input rotating shaft (24) is connected to the fourth gear box (14).