Travel suitcase

Abstract

The invention discloses a travel suitcase capable of replacing walking. The travel suitcase comprises a suitcase body assembly, a pull rod assembly, a driving wheel and a driven wheel, the box body assembly comprises a lower box body and an upper box body, the lower portion of the front portion of the upper box body is hinged and fixed to the upper portion of the front portion of the lower box body, and the rear portions of the lower box body and the upper box body are fixedly connected through a lock catch. The number of the driving wheels is two, the two driving wheels both adopt hub motor driving wheels, and the key point is that the device further comprises a control device and a power supply assembly. And a handle hole penetrating inside and outside is formed in the front part of the upper box body. The control device comprises a rocker device and a control system; the rocker device is fixedly arranged on the handle, the control system comprises a double-drive controller, the double-drive controller has a differential function, the rocker device is electrically connected with the double-drive controller in a signal mode, and the double-drive controller is electrically connected with the two driving wheels. And the mobile power supply is downwards inserted into the battery compartment and is electrically connected with the control device through the corresponding electric connection plug-in assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent suitcases, in particular to a travel-replacing suitcase. Background Art

[0002] In our daily life and work, people are doing more and more outdoor activities such as leisure travel and business travel. When traveling, people usually carry a suitcase to carry some necessary personal daily necessities or materials. As we all know, when we travel by subway, train or plane, there is often a long distance to walk before entering and exiting the subway station. There is also often a long distance from the parking lot to the station waiting room or airport terminal (several hundred meters at least, one or two kilometers at most). It is not only a waste of time and effort to carry a suitcase and walk such a long distance.

[0003] Chinese patent document CN109602131B discloses a self-propelled suitcase and a self-propelled chassis. The invention provides a self-propelled suitcase and a self-propelled chassis with an automatic following function, which solves the problem that the user needs to move the suitcase manually, which is inconvenient to use, and has a high degree of intelligence. The structure includes a box and an actuating wheel module, the actuating wheel module is coupled to the box, each actuating wheel module includes a base and a wheel, the base has a first axis and a second axis, the base is coupled to the box and can rotate around the first axis relative to the box, the wheel is coupled to the base and can rotate around the second axis relative to the base, the wheel includes a wheel body and a forward motor, the wheel body is suitable for contacting a ground, the forward motor is arranged in the wheel body, the forward motor includes a motor stator and a motor rotor, the motor stator is fixed to the base, the motor rotor is fixed to the wheel body and rotatably mounted on the motor stator, wherein the motor stator drives the motor rotor to rotate and drive the wheel body when receiving a control signal, so that the wheel body can roll on the ground. The self-driving suitcase and the self-driving chassis both have a power source (i.e., the actuating wheel modules) to generate a driving force to follow the user. Therefore, when moving the suitcase or the self-driving chassis, the user does not need to move it manually, so as to improve the convenience of use. In addition, the self-driving suitcase and the self-driving chassis of the invention are also equipped with a camera module and / or a distance sensor (i.e., a first sensor, a second sensor, a third sensor, and a fourth sensor) to process the user's image and control the following distance. Therefore, the structural configuration and design of the self-driving suitcase and the self-driving chassis of the invention have an intelligent foundation. First, the structure is relatively complex and is prone to collision or vibration damage during consignment; second, the self-driving suitcase cannot be used as a seat and can only follow the user. During the walking process, its movement cannot be accurately controlled, which is prone to accidents; finally, the structure is easily disturbed in places with large traffic such as airports and train stations, making it inconvenient to use. Summary of the invention

[0004] The purpose of the present invention is to provide a travel suitcase which has a simple structure, is convenient to control, saves effort and can be used as a travel companion.

[0005] The basic technical scheme for achieving the purpose of the present invention is: a travel suitcase, including a case assembly, a rod assembly, a driving wheel and a driven wheel. The case assembly includes a lower case and an upper case, the lower front part of the upper case is hinged and fixed to the upper front part of the lower case, and the rear of the lower case and the upper case are fixedly connected by a lock. The rod assembly includes a telescopic rod and a handle, and the handle is fixedly arranged on the upper end of the telescopic rod. There are two driving wheels, both of which are driven by a hub motor, and its structural characteristics are: it also includes a control device and a power supply assembly. The front part of the upper case is provided with a handle hole running through the inside and outside. The control device includes a rocker device and a control system; the rocker device is fixedly arranged on the handle, and the control system includes a dual-drive controller, the dual-drive controller has a differential function, the rocker device is electrically connected to the dual-drive controller signal, the dual-drive controller is electrically connected to the two driving wheels, and the rocker device sends a PWM signal to the dual-drive controller through its single-chip microcomputer to control the two driving wheels. The power supply assembly includes a battery compartment and a mobile power supply. The mobile power supply is provided with a power handle and a power switch. The battery compartment is fixedly arranged in the front part of the lower box body, and the corresponding part is located in the handle hole of the upper box body. The mobile power supply is inserted downward into the battery compartment and is electrically connected to the control device through the corresponding electrical connection plug assembly.

[0006] Furthermore, in order to facilitate steering: there are two driven wheels, and both driven wheels are universal wheels or omnidirectional wheels.

[0007] Furthermore, in order to improve the bearing capacity: two driving wheels are coaxially fixed on the lower rear part of the lower box body, and the rear part of the driving wheel protrudes backwards out of the lower box body. There are two driven wheels, both of which are omnidirectional wheels, and the two omnidirectional wheels are coaxially fixed on the lower front part of the lower box body, and the front part of the omnidirectional wheels protrudes forwards out of the lower box body.

[0008] Furthermore, in order to improve riding comfort, a pedal assembly is also included. The pedal assembly includes two telescopic pedals and a pedal mounting tube. The pedal mounting tube is fixedly arranged in the lower front part of the lower box body. The two telescopic pedals are respectively arranged on the left and right sides of the pedal mounting tube.

[0009] Furthermore, in order to facilitate the operation of the telescopic pedal, the telescopic pedal includes a pedal tube, a pedal connection seat, a pedal guide seat, a pedal pull rod and a pedal positioning torsion spring. The pedal connection seat is hingedly connected to the pedal mounting seat. The pedal guide seat is slidably arranged on the pedal connection seat, the pedal tube is fixedly arranged on the pedal guide seat, the pedal pull rod is fixedly arranged in the pedal tube along the axis of the pedal tube, and a compression spring is arranged on the pedal pull rod for driving the pedal tube outward.

[0010] A Y-shaped torsion spring guide groove is provided on the front side of the pedal connection seat, a positioning block protruding forward is provided at the Y-shaped intersection of the torsion spring guide groove, and a torsion spring limiting groove is provided on the inner side of the positioning block. The depth of the groove section of the torsion spring guide groove surrounding the positioning block, which is located above the positioning block, gradually decreases from outside to inside, and the depth of the groove section located below the positioning block gradually increases from outside to inside, thereby forming a step at the Y-shaped intersection. The groove section of the torsion spring guide groove surrounding the positioning block, which is located on the inner side of the positioning block, is arranged in steps from top to bottom, that is, the depth of the groove gradually increases from top to bottom.

[0011] One end of the pedal positioning torsion spring is fixedly arranged on the pedal guide seat, and the other end is located in the torsion spring guide groove, and the torsion force of the pedal positioning torsion spring makes the end located in the torsion spring guide groove always fit backward on the groove bottom of the torsion spring guide groove.

[0012] The present invention has the following beneficial effects: (1) The travel suitcase of the present invention has a simple structure, convenient and flexible operation, and changes the traditional way of controlling a hand-pulled or intelligent self-propelled suitcase. The forward and backward movement and steering of the travel suitcase are realized through a control device, which is easy to operate and can be completed with one hand. The control is more precise and flexible, and no manpower is required to pull the suitcase, which can greatly save physical strength. Secondly, the travel suitcase of the present invention can be used for walking and riding. When walking, it can be operated with one hand, which is convenient to operate, which is conducive to improving the self-balancing ability during operation, and is conducive to maintaining the comfort of riding. The safety is greatly improved, and the reliability of the control device is greatly improved.

[0013] (2) The two driving wheels of the travel suitcase of the present invention are coaxially fixed on the lower rear part of the lower box body, which is conducive to improving the carrying capacity of the travel suitcase and facilitating walking; the rear part of the driving wheel protrudes backwards from the lower box body, which is conducive to improving the stability of the travel suitcase. When the two driven wheels are omnidirectional wheels, the two omnidirectional wheels are coaxially fixed on the lower front part of the lower box body, which is conducive to improving the carrying capacity of the travel suitcase; the front part of the omnidirectional wheel protrudes forwards from the lower box body, which is conducive to improving the stability of the travel suitcase.

[0014] (3) The footrest assembly of the travel case of the present invention is easy to operate and can be easily retracted and unfolded, thereby greatly improving the riding comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the travel case of the present invention in a stored state.

[0016] Figure 2 for Figure 1 Schematic diagram of the right side.

[0017] Figure 3 for Figure 1 Rear view schematic diagram of .

[0018] Figure 4 for Figure 1 Schematic top view of .

[0019] Figure 5 for Figure 1 Schematic diagram when viewed from the upper right front.

[0020] Figure 6 for Figure 1 Schematic diagram when viewed from the lower left rear.

[0021] Figure 7 For Figure 1 Schematic diagram of the Times Bu suitcase in the unfolded state as viewed from the upper right front.

[0022] Figure 8 For Figure 1 Schematic diagram of the travel suitcase in the unfolded state when viewed from the lower left rear.

[0023] Fig. 9 For Figure 1 Schematic diagram of the rear-right upper rear suitcase in the unfolded state with the upper case cover removed.

[0024] Fig.10 For Figure 1 Schematic diagram of the rear walking suitcase in the unfolded state with the upper case cover removed when viewed from the upper left front.

[0025] Fig.11 For Figure 1 Schematic diagram of the upper box cover when viewed from the lower right front.

[0026] Fig.12 A schematic diagram of the battery compartment.

[0027] Fig.13 This is a schematic diagram of the pedal assembly when it is unfolded.

[0028] Fig.14 This is a schematic diagram of the pedal assembly after removing one pedal tube when it is unfolded.

[0029] Fig.15 A schematic diagram of the pedal connection seat.

[0030] Fig.16 This is the principle block diagram of the control device.

[0031] The reference numerals in the accompanying drawings are: Box assembly 1, lower box 1-1, upper box 1-2, handle hole 1-21, Pull rod assembly 2, telescopic pull rod 2-1, handle 2-2, Control device 3, joystick device 31, lighting module 31-1, control system 32, Driving wheel 4, driven wheel 5, Pedal assembly 6, telescopic pedal 6-1, pedal tube 6-11, pedal connecting seat 6-12, torsion spring guide groove 6-121, positioning block 6-122, torsion spring limiting groove 6-1221, pedal guide seat 6-13, pedal pull rod 6-14, pedal positioning torsion spring 6-15, Pedal mounting tube 6-2, pedal mounting seat 6-21, Power supply assembly 7, battery compartment 7-1, mobile power supply 7-2, power handle 7-21, power switch 7-22, Lock buckle 8. DETAILED DESCRIPTION

[0032] In order to make the content of the present invention easier to understand, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings. The forward direction of the travel suitcase when traveling is the front direction, and the left and right directions when traveling forward are the left and right directions described. Figure 3 The directions shown are explained, that is, Figure 3 The up, down, left, and right directions shown are the up, down, left, and right directions described. Figure 1 The direction you are facing is the rear, away from Figure 1 It should be understood that the terms "upper", "lower", "inner", "outer" and the like indicating directions or positional relationships are based on the positional relationships described in the drawings and are only for the convenience of describing the present invention or simplifying the description, rather than indicating a specific direction that must be possessed.

[0033] (Example 1) See Figures 1 to 16 The travel suitcase of this embodiment includes a case assembly 1, a pull rod assembly 2, a control device 3, a driving wheel 4, a driven wheel 5, a pedal assembly 6 and a power supply assembly 7. There are two driving wheels 4, both of which are hub motor driving wheels, and the motor unit is a brushless Hall motor. There are two driven wheels 5, both of which are universal wheels or omnidirectional wheels, and both of which are omnidirectional wheels in this embodiment.

[0034] See Figures 1 to 10The box assembly 1 includes a lower box 1-1 and an upper box 1-2. The lower front part of the upper box 1-2 is hingedly fixed to the upper front part of the lower box 1-1. The rear parts of the lower box 1-1 and the upper box 1-2 are fixedly connected by a lock 8. After the lock 8 is opened, the rear part of the upper box 1-2 can be flipped upward to open. The front part of the upper box 1-2 is provided with a handle hole 1-21 that runs through the inside and outside. The two driving wheels 4 are coaxially fixedly arranged on the lower rear part of the lower box 1-1, and the rear part of the driving wheels 4 protrudes backwards out of the lower box 1-1. When the two driven wheels 5 are omnidirectional wheels, the two omnidirectional wheels are coaxially fixedly arranged on the lower front part of the lower box 1-1, and the front part of the omnidirectional wheels protrudes forward out of the lower box 1-1. When the two driven wheels 5 are universal wheels, the two universal wheels are respectively fixedly arranged on the left front part and the right front part of the lower front part of the lower box 1-1.

[0035] The rod assembly 2 includes two telescopic rods 2-1 and a handle 2-2. The handle 2-2 is fixedly arranged on the upper ends of the two telescopic rods 2-1 and is used to control the extension and unlocking of the telescopic rods 2-1.

[0036] The control device 3 includes a rocker device 31 and a control system 32. The rocker device 31 of this embodiment adopts a Hall-type rocker device. The control system 32 includes a dual-drive controller, and the dual-drive controller has a differential function. The rocker device 31 is electrically connected to the dual-drive controller signal, and the rocker device 31 is provided with a light module 31-1, and the light module 31-1 is arranged around the rocker. The dual-drive controller is electrically connected to the two drive wheels 4. The rocker device 31 is fixedly arranged on the handle 2-2. The rocker device 31 sends a PWM signal to the dual-drive controller through its single-chip microcomputer to control the two drive wheels 4 to realize the movement of the travel suitcase. The PWM control signal frequency is 20KHZ, (forward) forward rotation 0%--50%, reverse rotation 50%--100%, (left and right) left turn 0%--50%, right turn 50%--100%.

[0037] When operating the joystick of the joystick device 31, the control device 3 can be awakened by short pressing the joystick. After awakening, the light module 31-1 around the joystick works in a breathing light mode to remind that the device is powered on. By long pressing the joystick, the control device 3 enters the standby state.

[0038] When the rocker is pushed forward in static state, the two driving wheels 4 drive the travel suitcase forward at the same rotation speed.

[0039] When the rocker is pulled backward in static state, the two driving wheels 4 drive the travel suitcase to move backward at the same rotation speed.

[0040] When moving forward, the joystick is pushed toward the left front, and the rotation speed of the driving wheel 4 on the right side is greater than that of the driving wheel 4 on the left side, so that the suitcase can turn left when moving forward. Specifically, the rotation speed of the driving wheel 4 on the right side remains unchanged, and the driving wheel 4 on the left side is braked or decelerated (that is, left and right differential control), so that the suitcase can turn to the left during the moving process; the driven wheel adaptively follows the state of the suitcase to complete the turn.

[0041] When moving forward, the joystick is pushed toward the right front, and the rotation speed of the driving wheel 4 on the left is greater than that of the driving wheel 4 on the right, so that the suitcase can turn right when moving forward. Specifically, the rotation speed of the driving wheel 4 on the left remains unchanged, and the driving wheel 4 on the right is braked or decelerated (that is, left and right differential control), so that the suitcase can turn to the right during the moving process; the driven wheel adaptively follows the state of the suitcase to complete the turn.

[0042] When the joystick is pushed to the left in a static state, the driving wheel 4 on the right side rotates in the forward direction, and the driving wheel 4 on the left side rotates in the backward direction, that is, the two driving wheels 4 rotate in opposite directions, so that the suitcase can turn left on the spot, and the driven wheel adaptively follows the state of the suitcase to complete the turn.

[0043] When the joystick is pushed to the right front in static state, the driving wheel 4 on the right side rotates in the backward direction, and the driving wheel 4 on the left side rotates in the forward direction, that is, the two driving wheels 4 rotate in opposite directions, so that the suitcase can turn right on the spot, and the driven wheel adaptively follows the state of the suitcase to complete the turn.

[0044] When moving backward, the joystick is pushed toward the left rear, and the rotation speed of the driving wheel 4 on the right side is greater than that of the driving wheel 4 on the left side, so that the suitcase can turn left when moving backward. Specifically, the rotation speed of the driving wheel 4 on the right side remains unchanged, and the driving wheel 4 on the left side is braked or decelerated (that is, left and right differential control), so that the suitcase can turn to the left during the backward movement; the driven wheel adaptively follows the state of the suitcase to complete the turn.

[0045] When moving backward, the joystick is pushed toward the right rear, and the rotation speed of the driving wheel 4 on the left is greater than that of the driving wheel 4 on the right, so that the suitcase can turn right when moving backward. Specifically, the rotation speed of the driving wheel 4 on the left remains unchanged, and the driving wheel 4 on the right is braked or decelerated (that is, left and right differential control), so that the suitcase can turn to the right during the movement, and the driven wheel adaptively follows the state of the suitcase to complete the turn.

[0046] The pedal assembly 6 includes two telescopic pedals 6-1 and a pedal mounting tube 6-2. The pedal mounting tube 6-2 is fixedly arranged in the lower front part of the lower box body 1-1. The two telescopic pedals 6-1 are centrally symmetrically arranged in the pedal mounting tube 6-2. When walking, the telescopic pedals 6-1 can be extended outwards to facilitate foot placement. A pedal mounting seat 6-21 is fixedly arranged in the pedal mounting tube 6-2.

[0047] The telescopic pedal 6-1 includes a pedal tube 6-11, a pedal connection seat 6-12, a pedal guide seat 6-13, a pedal pull rod 6-14 and a pedal positioning torsion spring 6-15. The pedal connection seat 6-12 is hingedly connected to the pedal mounting seat 6-21. The pedal guide seat 6-13 is slidably arranged on the pedal connection seat 6-12, the pedal tube 6-11 is fixedly arranged on the pedal guide seat 6-13, the pedal pull rod 6-14 is fixedly arranged in the pedal tube 6-11 along the axis of the pedal tube 6-11, and a compression spring is arranged on the pedal pull rod 6-14, which is used to drive the pedal tube 6-11 outward (that is, the restoring force of the compression spring is outward), so that the pedal tube 6-11 extends out of the pedal mounting tube 6-2, and when the pedal tube 6-11 is retracted into the pedal mounting tube 6-2, the corresponding part of the pedal pull rod 6-14 extends into the pedal connection seat 6-12.

[0048] A Y-shaped torsion spring guide groove 6-121 is provided on the front side of the pedal connecting seat 6-12, and a forward-protruding positioning block 6-122 is provided at the Y-shaped junction of the torsion spring guide groove 6-121. A torsion spring limiting groove 6-1221 is provided on the inner side of the positioning block 6-122. The depth of the groove section of the torsion spring guide groove 6-121 surrounding the positioning block 6-122, which is located above the positioning block 6-122, gradually decreases from the outside to the inside, and the depth of the groove section located below the positioning block 6-122 gradually increases from the outside to the inside, thereby forming a step 6-123 at the Y-shaped junction. The groove section of the torsion spring guide groove 6-121 surrounding the positioning block 6-122, which is located on the inner side of the positioning block 6-122, is arranged in steps from top to bottom in sequence (the steps have 3 levels, see Fig.15 ), that is, the depth of the groove gradually increases from top to bottom.

[0049] One end of the pedal positioning torsion spring 6-15 is fixedly set on the pedal guide seat 6-13, and the other end is located in the torsion spring guide groove 6-121, and the torsion force of the pedal positioning torsion spring 6-15 makes the one end located in the torsion spring guide groove 6-121 always fit backward on the bottom of the torsion spring guide groove 6-121. When the pedal tube 6-11 is retracted into the pedal mounting tube 6-2, the pedal tube 6-11 is pressed inward, and one end of the pedal positioning torsion spring 6-15 located in the torsion spring guide groove 6-121 moves inward along the torsion spring guide groove 6-121. When it moves to the Y-shaped junction of the torsion spring guide groove 6-121, the pedal positioning torsion spring 6-15 moves upward under the guidance of the step 6-123, and falls into the next step when it moves to the end. The pedal tube 6-11 is released, and the pedal tube 6-11 moves outward under the action of the compression spring. The pedal positioning torsion spring 6-15 faces outward along the step and falls into the next step, thereby sliding into the torsion spring limiting groove 6-1221, so that the pedal tube 6-11 remains in the retracted state. When it needs to be unfolded, first press the pedal tube 6-11 inward, the pedal positioning torsion spring 6-15 moves backward to disengage from the torsion spring limiting groove 6-1221 and then falls into the torsion spring guide groove 6-121 in the next step, then release the pedal tube 6-11, the pedal tube 6-11 moves outward under the action of the compression spring, the pedal positioning torsion spring 6-15 moves outward and slides out from the step 6-123, so that the pedal tube 6-11 extends outward and unfolds.

[0050] The power supply assembly 7 includes a battery compartment 7-1 and a mobile power supply 7-2. The mobile power supply 7-2 is provided with a power handle 7-21 and a power switch 7-22. The mobile power supply 7-2 adopts a 24V power supply and can output two power supplies at the same time, one of which provides a 24V power supply for the dual-drive controller, and the other is a TYPE-C interface, which can provide a 5V2A output for the mobile device. The battery compartment 7-1 is fixedly set in the front part of the lower box body 1-1, and the corresponding part is located in the handle hole 1-21 of the upper box body 1-2. When the upper box body 1-2 is in a closed state, the corresponding part of the battery compartment 7-1 closes the handle hole 1-21. The two telescopic pull rods 2-1 are respectively fixedly set in the left and right sides of the front part of the lower box body 1-1. The two telescopic pull rods 2-1 are fixedly set on the lower box body 1-1 by their respective fixing rods, and the corresponding parts are fixed on the battery compartment 7-1, and the upper end extends upward out of the battery compartment 7-1. The mobile power source 7-2 is inserted downward into the battery compartment 7-1, and is electrically connected to the control system 32 via a corresponding electrical connection plug-in assembly, which is prior art.

[0051] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A travel case, comprising a case assembly (1), a pull rod assembly (2), a driving wheel (4) and a driven wheel (5); the case assembly (1) comprises a lower case (1-1) and an upper case (1-2), the front lower portion of the upper case (1-2) being hingedly fixed to the front upper portion of the lower case (1-1), and the rear portions of the lower case (1-1) and the upper case (1-2) being fixedly connected by a lock (8); the pull rod assembly (2) comprises a telescopic pull rod (2-1) and a handle (2-2), and the handle (2-2) is fixedly arranged on the upper end of the telescopic pull rod (2-1); there are two driving wheels (4), both of which are driven by a hub motor, and the invention is characterized in that: It also includes a control device (3) and a power supply assembly (7); the front of the upper box body (1-2) is provided with a handle hole (1-21) that runs through the inside and outside; The control device (3) comprises a rocker device (31) and a control system (32); the rocker device (31) is fixedly arranged on the handle (2-2); the control system (32) comprises a dual-drive controller, the dual-drive controller has a differential function, the rocker device (31) is electrically connected to the dual-drive controller by signal, the dual-drive controller is electrically connected to two drive wheels (4), and the rocker device (31) controls the two drive wheels (4) by sending a PWM signal to the dual-drive controller via its single-chip microcomputer; the power supply assembly (7) comprises a battery compartment (7-1) and a mobile power supply (7-2); the battery compartment (7-1) is fixedly arranged in the front part of the lower box (1-1), and the corresponding part is located in the handle hole (1-21) of the upper box (1-2); the mobile power supply (7-2) is inserted downward into the battery compartment (7-1) and is electrically connected to the control system (32) via a corresponding electrical connection plug assembly.

2. The travel suitcase according to claim 1, characterized in that: There are two driven wheels (5), and both driven wheels (5) are universal wheels or omnidirectional wheels.

3. The travel suitcase according to claim 1, characterized in that: Two driving wheels (4) are coaxially fixedly arranged on the lower rear part of the lower box body (1-1), and the rear part of the driving wheel (4) protrudes backwards outside the lower box body (1-1); there are two driven wheels (5), both driven wheels (5) are omnidirectional wheels, the two omnidirectional wheels are coaxially fixedly arranged on the lower front part of the lower box body (1-1), and the front part of the omnidirectional wheels protrudes forwards outside the lower box body (1-1).

4. The travel suitcase according to claim 1, characterized in that: It also includes a pedal assembly (6); the pedal assembly (6) includes two telescopic pedals (6-1) and a pedal mounting tube (6-2); the pedal mounting tube (6-2) is fixedly arranged in the lower front part of the lower box body (1-1); and the two telescopic pedals (6-1) are respectively arranged on the left and right sides of the pedal mounting tube (6-2).

5. The travel suitcase according to claim 4, characterized in that: The telescopic pedal (6-1) comprises a pedal tube (6-11), a pedal connection seat (6-12), a pedal guide seat (6-13), a pedal pull rod (6-14) and a pedal positioning torsion spring (6-15); the pedal connection seat (6-12) is hingedly connected to the pedal mounting seat (6-21); the pedal guide seat (6-13) is slidably arranged on the pedal connection seat (6-12), the pedal tube (6-11) is fixedly arranged on the pedal guide seat (6-13), the pedal pull rod (6-14) is fixedly arranged in the pedal tube (6-11) along the axis of the pedal tube (6-11), and a compression spring is arranged on the pedal pull rod (6-14) for driving the pedal tube (6-11) outward; A Y-shaped torsion spring guide groove (6-121) is provided on the front side of the pedal connection seat (6-12); a positioning block (6-122) protruding forward is provided at the Y-shaped intersection of the torsion spring guide groove (6-121); a torsion spring limiting groove (6-1221) is provided on the inner side of the positioning block (6-122); the groove depth of the groove section of the torsion spring guide groove (6-121) surrounding the positioning block (6-122) located above the positioning block (6-122) gradually decreases from outside to inside, and the groove depth of the groove section located below the positioning block (6-122) gradually increases from outside to inside, thereby forming a step (6-123) at the Y-shaped intersection; the groove section of the torsion spring guide groove (6-121) surrounding the positioning block (6-122) located on the inner side of the positioning block (6-122) is arranged in steps from top to bottom, that is, the groove depth gradually increases from top to bottom; One end of the pedal positioning torsion spring (6-15) is fixedly arranged on the pedal guide seat (6-13), and the other end is located in the torsion spring guide groove (6-121), and the torsion force of the pedal positioning torsion spring (6-15) causes the end located in the torsion spring guide groove (6-121) to always fit backwards on the groove bottom of the torsion spring guide groove (6-121).

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