Electric steering device and intelligent electric suitcase

Abstract

The utility model discloses an electric steering device and an intelligent electric traveling case, and belongs to the field of luggage cases, the electric steering device comprises a fixed rod and a lifting rod, the lifting rod is slidably mounted on the upper portion of the fixed rod and can slide in the length direction of the fixed rod, a driving motor is arranged in the fixed rod, and a lead screw is arranged at the output end of the driving motor; the lead screw is in threaded connection with the lifting rod, and the lifting rod ascends and descends relative to the fixing rod in the thread direction. The driving motor is arranged in the fixing rod, electric stretching and retracting of the handle rod are achieved in the mode that the lead screw is in threaded connection with the lifting rod, the structural design is simple and compact, and the use convenience is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of luggage cases, and in particular to an electric steering device and an intelligent electric suitcase. Background Art

[0002] A suitcase, also known as a luggage case or trolley case, is a box used to carry items such as clothing and daily necessities when traveling. Electric suitcases improve upon traditional suitcases by making them rideable, thus reducing the burden of carrying them. However, during the research process for this application, the inventors discovered that the steering mechanism of existing electric suitcases uses a manual lift mechanism, requiring users to frequently manually lift and lower the suitcase, which is very inconvenient. Utility Model Content

[0003] The present application provides an electric steering device and an intelligent electric suitcase to solve the problems raised in the background technology.

[0004] An electric steering device includes a fixed rod and a lifting rod. The lifting rod is slidably mounted on the upper part of the fixed rod and can slide along the length direction of the fixed rod. A drive motor is provided inside the fixed rod. A screw is provided at the output end of the drive motor. The screw is threadedly connected to the lifting rod. The lifting rod rises and falls relative to the fixed rod along the thread direction.

[0005] Preferably, the outer periphery of the lead screw is provided with an external thread, the bottom of the lifting rod is provided with a threaded connection block, the threaded connection block is provided with an internal thread adapted to the external thread, and the lead screw is inserted into the threaded connection block to achieve threaded connection with the lifting rod.

[0006] Preferably, the inner side wall of the fixed rod is provided with a limiting rib, and the outer side wall of the lifting rod is provided with a limiting groove adapted to the limiting rib, and the lifting rod is inserted into the limiting groove through the limiting rib to achieve relative sliding of the fixed rod.

[0007] Preferably, a partition is provided inside the lifting rod, which divides the interior of the lifting rod into a first cavity and a second cavity. The lead screw is inserted into the first cavity and threadedly connected to the lifting rod. A signal connection line is provided in the second cavity.

[0008] Preferably, a handle assembly is provided on the upper part of the lifting rod, and the handle assembly includes a fixing part, two handle rods symmetrically mounted at both ends of the fixing part, two connecting rods, a first connecting rod and a second connecting rod, a connecting rod mounting cavity is opened inside the lead screw, a connecting rod mounting sleeve rotatably connected to the lead screw is provided in the connecting rod mounting cavity, a vertically arranged first rack is provided at the upper end of the connecting rod mounting sleeve, the upper end of the first connecting rod is fixedly mounted on the fixing part, and the lower end is inserted into the connecting rod mounting sleeve and is provided with a guide gear, one end of the two connecting rods is rotatably connected to the two handle rods respectively, and the other end is rotatably connected to the upper end of the second connecting rod, the lower end of the second connecting rod is inserted into the connecting rod mounting sleeve and is provided with a vertically arranged second rack, and the guide gear is meshed with the second rack.

[0009] Preferably, a handle assembly is provided on the upper part of the lifting rod, and the handle assembly includes a fixing part, two handle rods symmetrically installed at both ends of the fixing part, and a rotating connecting rod. A connecting rod sliding cavity is opened inside the screw, one end of the rotating connecting rod is inserted into the connecting rod sliding cavity and can slide up and down along the connecting rod sliding cavity, and the other end extends into the fixing part and is connected to a first bevel gear. Two second bevel gears located on both sides of the first bevel gear and adapted to the first bevel gear are provided inside the fixing part, and third bevel gears adapted to the second bevel gear are respectively provided at the rotating connections between the two handle rods and the fixing part.

[0010] An intelligent electric suitcase comprises a rideable suitcase body and the above-mentioned steering device.

[0011] Preferably, the box includes a controller, a slide rail fixed inside the box, a telescopic rod installed on the slide rail and capable of sliding along the slide rail and protruding out of the box, and the telescopic rod is rotatably connected to the fixed rod.

[0012] It can be seen from the above technical solution that the electric steering device and smart electric suitcase provided by this application realize the electric extension and retraction of the handle rod by arranging a drive motor inside the fixed rod and using the threaded connection between the lead screw and the lifting rod. The structural design is simple and compact, which greatly improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the electric power steering device provided for this application;

[0014] Figure 2 A schematic diagram of the connection between the fixed rod and the drive motor in the electric steering device provided in this application;

[0015] Figure 3 A three-dimensional diagram of a fixing rod in the electric power steering device provided in this application;

[0016] Figure 4A three-dimensional diagram of a drive motor and a lead screw in the electric power steering device provided in this application;

[0017] Figure 5 A three-dimensional diagram of a lifting rod and a threaded connection block in the electric steering device provided in this application;

[0018] Figure 6 A three-dimensional diagram of a threaded connection block in the electric power steering device provided in this application;

[0019] Figure 7 A three-dimensional diagram of a lifting rod in the electric power steering device provided in this application;

[0020] Figure 8 A schematic diagram of a first embodiment of electrically folding a handle assembly in the electric steering device provided by the present application;

[0021] Figure 9 A perspective view of a drive motor and a lead screw in a first embodiment of an electrically foldable handle assembly;

[0022] Figure 10 A bottom perspective view of the connecting rod mounting sleeve in the first embodiment of the electric folding handle assembly;

[0023] Figure 11 A top perspective view of the connecting rod mounting sleeve in a first embodiment of the power-folding handle assembly;

[0024] Figure 12 A schematic diagram of the handle assembly in a first embodiment in which the handle assembly is electrically folded;

[0025] Figure 13 A schematic diagram of the connection between the connecting rod and the handle bar in the first embodiment of the electric folding of the handle assembly;

[0026] Figure 14 A schematic diagram of the positions of the first connecting member and the second connecting member in the first embodiment of the electric folding of the handle assembly;

[0027] Figure 15 for Figure 14 A partial enlarged view of point A in the middle;

[0028] Figure 16 A perspective view of the first connecting member in the first embodiment of the electric folding of the handle assembly;

[0029] Figure 17 for Figure 16 A partial enlarged view of point B in the middle;

[0030] Figure 18 A schematic diagram of the connection between the second connecting member and the connecting rod in the first embodiment of the electric folding of the handle assembly;

[0031] Figure 19 for Figure 18 A partial enlarged view of point C in the middle;

[0032] Figure 20 A schematic diagram of the connection between the handle bar, the fixing member and the connecting rod in the first embodiment of the electric folding of the handle assembly;

[0033] Figure 21 A schematic diagram of the connection between the handle bar and the connecting rod in the first embodiment of the electric folding of the handle assembly;

[0034] Figure 22 A schematic diagram of the first embodiment of the electrically foldable handle assembly showing the handle rod in a folded state;

[0035] Figure 23 A schematic diagram of a second embodiment of electrically folding the handle assembly in the electric steering device provided by this application;

[0036] Figure 24 A perspective view of a drive motor and a lead screw in a second embodiment of an electrically foldable handle assembly;

[0037] Figure 25 A schematic diagram of the connection between the rotating connecting rod and the handle rod in the second embodiment of the electric folding of the handle assembly;

[0038] Figure 26 A perspective view of the connection between the rotating connecting rod and the handle bar in the second embodiment of the electric folding of the handle assembly;

[0039] Figure 27 A schematic diagram of the connection between the rotating connecting rod and the handle assembly in the second embodiment of the electric folding of the handle assembly;

[0040] Figure 28 A schematic diagram of the connection between the rotating connecting rod, the combined spur gear and the first helical gear in the second embodiment of the electric folding of the handle assembly;

[0041] Figure 29 A schematic diagram of the connection between the first helical gear, the second helical gear, and the third helical gear in the second embodiment of the electric folding of the handle assembly;

[0042] Figure 30 A schematic diagram of the connection between the handle bar and the third bevel gear in the second embodiment of the electric folding of the handle assembly;

[0043] Figure 31 A perspective view of the handlebar in a second embodiment of the electrically foldable handle assembly;

[0044] Figure 32A schematic diagram of a second embodiment of the electrically foldable handle assembly showing a folded handle bar;

[0045] Figure 33 A side view of the smart electric suitcase provided for this application;

[0046] Figure 34 A rear perspective view of the smart electric suitcase provided for this application;

[0047] Figure 35 A schematic diagram of the internal structure of the smart electric suitcase provided for this application;

[0048] Figure 36 A front perspective view of the front baffle of the smart electric suitcase provided in this application;

[0049] Figure 37 A rear perspective view of the front baffle of the smart electric suitcase provided in this application;

[0050] Figure 38 A schematic diagram of the location of the opening of the smart electric suitcase provided in this application;

[0051] Figure 39 This is a schematic diagram of the smart electric suitcase provided in this application in the non-riding state.

[0052] Among them: 10-fixed rod, 101-drive motor, 102-screw, 103-motor mounting seat, 104-limiting rib, 20-lifting rod, 201-threaded connecting block, 202-limiting groove, 203-partition, 204-first cavity, 205-second cavity, 206-signal connecting line, 30-wheel, 40-handle assembly, 401-fixed part, 402-handle rod, 403-connecting rod, 404-first connecting part, 405-second connecting part, 406-connecting rod mounting cavity, 407-connecting rod mounting sleeve, 408-rotating bearing, 409-first rack, 410-guide gear, 411-second rack, 412-rotating connecting part, 413-rotating connecting block, 414-axis hole, 415-pin shaft, 416-rotating groove, 417-first avoidance portion, 418-second avoidance portion, 419-rotating connecting rod, 420-connecting rod sliding cavity, 421-first bevel gear, 422-second bevel gear, 423-third bevel gear, 424-gear groove, 425-first spur gear, 426-second spur gear, 427-combined spur gear, 428-upper spur gear, 429-lower spur gear, 50-box, 501-rear wheel, 502-controller, 503-slide rail, 504-telescopic rod, 505-electric telescopic push rod, 506-opening, 507-front baffle, 508-jack, 509-groove, 510-battery, 511-battery slot, 512-rear pull rod, 513-power switch, 514-control switch. DETAILED DESCRIPTION

[0053] The following detailed description of the specific embodiments of the present invention is provided in conjunction with the accompanying drawings, but is not intended to limit the scope of protection of the present invention. The terms "front," "back," "left," "right," "upper," "lower," and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention. The terms "first" and "second" are only used to simplify the textual description to distinguish between similar objects and should not be understood as a prioritization of a specific order.

[0054] See Figure 1 、 Figures 4 to 6The present application provides an electric steering device, including a fixed rod 10 and a lifting rod 20. A wheel 30 is connected to the bottom of the fixed rod 10. The wheel 30 is a hub motor wheel for providing mobile power. The lifting rod 20 is slidably installed on the upper part of the fixed rod 10 and can slide along the length direction of the fixed rod 10. A drive motor 101 is provided inside the fixed rod 10. A screw 102 is provided at the output end of the drive motor 101. The screw 102 is threadedly connected to the lifting rod 20. When the drive motor 101 is started, its output end drives the screw 102 to rotate. Since the drive motor 101 body is fixed, when the screw 102 rotates, the lifting rod 20 threadedly connected to the screw 102 rises and falls around the thread direction, thereby realizing the electric lifting of the steering device.

[0055] Furthermore, an external thread is provided on the outer periphery of the lead screw 102, and a threaded connection block 201 is provided at the bottom of the lifting rod 20. The threaded connection block 201 is fixedly connected to the lifting rod 20, and an internal thread that is adapted to the external thread is provided inside the threaded connection block 201. The lead screw 102 is inserted into the threaded connection block 201 to achieve a threaded connection with the lifting rod 20.

[0056] See Figure 2 、 Figure 3 ,and Figure 7 A motor mounting seat 103 is provided inside the fixed rod 10, and the drive motor 101 is fixedly installed on the motor mounting seat 103; a limiting rib 104 is provided on the inner side wall of the fixed rod 10, and a limiting groove 202 is provided on the outer side wall of the lifting rod 20 to match the limiting rib 104. The lifting rod 20 is inserted into the limiting groove 202 through the limiting rib 104 to achieve relative sliding of the fixed rod 10. The cooperation between the limiting rib 104 and the limiting groove 202 not only provides a sliding guide for the sliding of the lifting rod 20, but also provides a steering limit for the lifting rod 20 and the fixed rod 10, so that the lifting rod 20 can synchronously drive the fixed rod 10 to turn left and right when turning left and right.

[0057] A partition 203 is provided inside the lifting rod 20, which divides the interior of the lifting rod 20 into a first cavity 204 and a second cavity 205. The screw 102 is inserted into the first cavity 204 and threadedly connected to the lifting rod 20. A signal connection line 206 is provided in the second cavity 205. By setting the partition 203, the screw 102 and the signal connection line 206 can be separated to avoid interference or entanglement between the screw 102 and the signal connection line 206 during rotation.

[0058] A handle assembly 40 for the user to hold is provided on the upper portion of the lifting rod 20. The present application provides the following two implementations for electrically folding the handle assembly 40:

[0059] The first implementation method: See Figures 8 to 19A handle assembly 40 is provided on the upper part of the lifting rod 20, and the handle assembly 40 includes a fixing part 401, two handle rods 402 symmetrically installed at both ends of the fixing part 401, two connecting rods 403, a first connecting rod 404 and a second connecting rod 405. A connecting rod mounting cavity 406 is opened inside the screw 102, and the connecting rod mounting cavity 406 extends along the length direction of the screw 102 and passes through the top of the screw 102. A connecting rod mounting sleeve 407 rotatably connected to the screw 102 is provided in the connecting rod mounting cavity 406. When the screw 102 rotates, the connecting rod mounting cavity 406 does not rotate with the screw 102. Specifically, the connecting rod mounting cavity 406 and the connecting rod mounting sleeve 407 are both cylindrical, and a rotating bearing 408 is provided at the bottom of the connecting rod mounting sleeve 407. The connecting rod mounting sleeve 407 is inserted into the connecting rod mounting cavity 406 and rotatably connected to the screw 102. A first rack 409 is vertically arranged at the upper end of the connecting rod mounting sleeve 407, the upper end of the first connecting rod 404 is fixedly mounted on the fixing part 401, the lower end is inserted into the connecting rod mounting sleeve 407 and is provided with a guide gear 410, one end of the two connecting rods 403 is rotatably connected to the two handle rods 402 respectively, and the other end is rotatably connected to the upper end of the second connecting rod 405, the lower end of the second connecting rod 405 is inserted into the connecting rod mounting sleeve 407, and the lower end of the second connecting rod 405 is provided with a second rack 411 vertically arranged, the guide gear 410 corresponds to the position of the second rack 411, and the guide gear 410 is meshed with the second rack 411, and the tooth surface of the second rack 410 is opposite to the tooth surface of the first rack 409.

[0060] When the lifting rod 20 is not raised, the two handle rods 402 are in a folded state facing downwards. When the driving motor 101 drives the lifting rod 20 to rise, the fixing part 401 fixed on the upper part of the lifting rod 20 rises synchronously. At the same time, the fixing part 401 drives the first connecting rod 404 to rise relative to the connecting rod mounting sleeve 407, and the connecting rod 403 drives the second connecting rod 405 to rise relative to the connecting rod mounting sleeve 407. When the first connecting rod 404 rises to a certain height relative to the connecting rod mounting sleeve 407, the guide gear 410 contacts the first rack 409 located at the upper end of the connecting rod mounting sleeve 407 and meshes with the first rack 409. During the process of the first connecting rod 404 continuing to rise, the guide gear 410 starts to rotate relative to the first rack 409, and the guide gear 410 rotates After the movement, the second rack 411 engaged with the guide gear 410 is driven to slide upward, that is, the second connecting rod 405 is driven to slide upward relative to the first connecting rod 404, the second connecting rod 405 slides upward and supports the connecting rod 403 to move upward, and the connecting rod 403 drives the handle rod 402 to rotate upward to realize electric unfolding; when the driving motor 101 drives the lifting rod 20 to descend, the fixing part 401 drives the first connecting rod 404 to descend, and at the same time the guide gear 410 rotates along the first rack 409, and drives the second connecting rod 405 to slide downward relative to the first connecting rod 404, the first connecting rod 404 pulls the connecting rod 403 downward, and drives the handle rod 402 to rotate downward and fold. After the guide gear 410 disengages from the first rack 409, the handle rod 402 is completely folded.

[0061] See Figures 20 to 22 414. The end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 416, and the end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 416, and the end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 416, and the end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 416, and the end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 416, and the end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 416, and the end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 416, and the end of the connecting rod 403 near the handle bar 402 is inserted into the rotating groove 414. Two handle bars 402 are symmetrically arranged at both ends of the fixing member 401 and have the same connection structure as the fixing member 401 and the connecting rod 403;

[0062] See Figure 12 and Figure 13The connecting rod 403 is a wavy connecting rod. Since the connecting rod 403 is also in a state of movement inside the fixed part 401 during the rotation of the handle bar 402, the wavy connecting rod design of the connecting rod 403 allows it to avoid other structural components during movement to prevent interference and affect the normal rotation of the handle bar 402. A first avoidance portion 417 is provided at both ends of the fixed part 401. The end of the handle bar 402 near the fixed part 401 is provided with a second avoidance portion 418 that adapts to the first avoidance portion 417. The first avoidance portion 417 and the second avoidance portion 418 are both L-shaped. When the handle bar 402 is rotated downward, the first avoidance portion 417 and the second avoidance portion 418 are in contact with each other.

[0063] Second implementation method: See Figures 23 to 27 A handle assembly 40 is provided on the upper part of the lifting rod 20. The handle assembly 40 includes a fixing part 401, two handle rods 402 symmetrically mounted at both ends of the fixing part 401, and a rotating connecting rod 419. A connecting rod sliding cavity 420 is opened inside the lead screw 102. The connecting rod sliding cavity 420 extends along the length direction of the lead screw 102 and passes through the top of the lead screw 102. One end of the rotating connecting rod 419 is inserted into the connecting rod sliding cavity 420 and can slide up and down along the connecting rod sliding cavity 420. The cross-sections of the rotating connecting rod 419 and the connecting rod sliding cavity 420 are polygonal cross-sections that adapt to each other. When the lead screw 102 rotates, the rotating connecting rod 419 is driven to rotate synchronously. The second bevel gear 421 is meshed with the second bevel gear 422.

[0064] When the lifting rod 20 is not raised, the two handle rods 402 are in a folded state facing downward. When the driving motor 101 is started, the lifting rod 20 rises upward relative to the fixed rod 10. At the same time, the screw 102 rotates to drive the rotating connecting rod 419 to rotate, and the rotating connecting rod 419 drives the first bevel gear 421 to rotate. The first bevel gear 421 drives the two second bevel gears 422 to rotate. The two second bevel gears 422 respectively drive the two third bevel gears 423 to rotate, thereby driving the handle rod 402 to rotate upward relative to the fixed part 401 to achieve electric unfolding; when the driving motor 101 drives the lifting rod 20 to descend, the screw 102 rotates in the opposite direction, driving the rotating connecting rod 419 to rotate in the opposite direction. The rotating connecting rod 419 sequentially drives the first bevel gear 421, the two second bevel gears 422, and the two third bevel gears 423 to rotate in the opposite direction, and finally drives the handle rod 402 to rotate downward relative to the fixed part 401 to achieve electric folding.

[0065] See Figures 28 to 32In this embodiment, a rotating connector 412 is provided at the end of the handlebar 402 near the fixed member 401. The rotating connector 412 is long and shank-shaped and protrudes outward from the handlebar 402. A gear slot 424 is defined within the rotating connector 412, and a third helical gear 423 is inserted into the gear slot 424 and fixedly connected to the rotating connector 412. Both the rotating connector 412 and the fixed member 401 are provided with corresponding axial holes 414, which correspond to the axis of the third helical gear 423. A pin 415 is inserted into the axial hole 414 and the axis of the third helical gear 423 to achieve the rotational connection between the handlebar 402 and the fixed member 401. The two second helical gears 422 have the same gear helical direction, and the two third helical gears 423 have the same gear helical direction, with the second helical gears 422 and the third helical gears 423 having opposite gear helical directions. The two handlebars 402 are symmetrically arranged at both ends of the fixed member 401 and share the same connection structure as the fixed member 401. A first spur gear 425 is provided at the end of the rotating connecting rod 419 that extends into the fixed member 401. A second spur gear 426 is coaxially provided with the first bevel gear 421. The second spur gear 426 and the first bevel gear 421 are integrally formed. The first spur gear 425 is transmission-connected to the second spur gear 426 via a combined spur gear 427. The combined spur gear 427 comprises an upper spur gear 428 and a lower spur gear 429. The upper spur gear 428 meshes with the second spur gear 426, and the lower spur gear 429 meshes with the first spur gear 425. The end of the rotating connecting rod 419 drives the first spur gear 425 to rotate. The first spur gear 425, in turn, drives the combined spur gear 427 to rotate the first bevel gear 421. The combined spur gear 427 can reduce the rotational speed transmitted from the rotating connecting rod 419 to the first bevel gear 421, thereby ensuring that the unfolding and folding of the handle bar 402 is synchronized with the raising and lowering of the lifting rod 20. A first avoidance portion 417 is provided at both ends of the fixing member 401, and a second avoidance portion 418 adapted to the first avoidance portion 417 is provided at the end of the handle rod 402 close to the fixing member 401. The first avoidance portion 417 and the second avoidance portion 418 are both L-shaped. When the handle rod 402 is rotated downward, the first avoidance portion 417 and the second avoidance portion 418 fit together.

[0066] In both of the above-mentioned embodiments, the lifting rod is electrically raised and lowered, and the handle bar is also electrically unfolded and folded.

[0067] See Figure 33 The present application also provides a smart electric suitcase, comprising a rideable box body 50 and the above-mentioned steering device.

[0068] Furthermore, a rear wheel 501 is provided on the rear side of the bottom of the box body 50, and the wheel 30 in the steering device is a power wheel. The rear wheel 501 is driven by the power wheel to realize the forward and backward movement of the electric suitcase. A controller 502, a slide rail 503 fixed to the inside of the box body 50, and a telescopic rod 504 installed on the slide rail 503 and capable of sliding along the slide rail 503 and protruding out of the box body 50 are provided inside the box body 50. The telescopic rod 504 is rotatably connected to the fixed rod 10. The telescopic rod 504 is a hollow tubular structure and is connected to the inside of the fixed rod 10. The signal of the drive motor 101 is connected to the controller 502.

[0069] See Figures 34 to 39 An electric telescopic push rod 505 is provided inside the box body 50, one end of the electric telescopic push rod 505 is fixed to the box body 50, and the other end is connected to the telescopic rod 504. The telescopic rod 504 is electrically telescopic in the front and rear directions under the drive of the electric telescopic push rod 505; an opening 506 is provided at the front of the box body 50, and a front baffle 507 is installed at the opening 506. A socket 508 for the telescopic rod 504 to pass through is provided at the upper part of the front baffle 507, and a groove 509 is provided at the lower part of the front baffle 507. The groove 509 is adapted to the wheel 30. When the telescopic rod 504 is in the retracted state, the wheel 30 is located in the groove 509; the slide rail 503 is provided at the socket 508 and is integrally formed with the front baffle 507.

[0070] A battery 510 and a battery slot 511 are provided at the rear of the box body 50, and the battery 510 can be detachably installed in the battery slot 511; a rear pull rod 512, a power switch 513 and a control switch 514 are also provided at the rear of the box body 50. The rear pull rod 512 is used for the user to manually push and pull the suitcase when the suitcase is not in the riding state. The electric telescopic push rod 505, the power switch 513 and the control switch 514 are all connected to the controller 502. The power switch 513 is used to control the opening and closing of the main power supply of the suitcase. The control switch 514 is used to control the electric telescopic push rod 505 and the drive motor 101. When switching to the riding state, the user operates the control switch 514, the electric telescopic push rod 505 drives the telescopic rod 504 to extend outward, and at the same time the driving motor 101 drives the lifting rod 20 to rise upward, and the handle bar 402 to unfold upward; when switching to the non-riding state, the user operates the control switch 514 again, the electric telescopic push rod 505 drives the telescopic rod 504 to retract inward, and at the same time the driving motor 101 drives the lifting rod 20 to retract downward, and the handle bar 402 to fold downward.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Therefore, although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An electric power steering device, characterized in that: The lifting rod comprises a fixed rod and a lifting rod, wherein the lifting rod is slidably mounted on the upper portion of the fixed rod and can slide along the length direction of the fixed rod. A driving motor is provided inside the fixed rod, and a lead screw is provided at the output end of the driving motor. The lead screw is threadedly connected to the lifting rod, and the lifting rod is lifted up and down relative to the fixed rod along the thread direction. A partition is provided inside the lifting rod, which divides the interior of the lifting rod into a first cavity and a second cavity. The lead screw is inserted into the first cavity and is threadedly connected to the lifting rod. A signal connection line is provided in the second cavity.

2. The electric power steering device according to claim 1, characterized in that The outer circumference of the lead screw is provided with an external thread, the bottom of the lifting rod is provided with a threaded connection block, the threaded connection block is provided with an internal thread adapted to the external thread, and the lead screw is inserted into the threaded connection block to achieve threaded connection with the lifting rod.

3. The electric power steering device according to claim 1, characterized in that The inner side wall of the fixed rod is provided with a limiting rib, and the outer side wall of the lifting rod is provided with a limiting groove adapted to the limiting rib. The lifting rod is inserted into the limiting groove through the limiting rib to achieve relative sliding of the fixed rod.

4. The electric power steering device according to claim 1, wherein: A handle assembly is provided on the upper part of the lifting rod, and the handle assembly includes a fixing part, two handle rods symmetrically installed at both ends of the fixing part, two connecting rods, a first connecting rod and a second connecting rod, a connecting rod mounting cavity is opened inside the lead screw, a connecting rod mounting sleeve rotatably connected to the lead screw is provided in the connecting rod mounting cavity, a vertically arranged first rack is provided at the upper end of the connecting rod mounting sleeve, the upper end of the first connecting rod is fixedly mounted on the fixing part, and the lower end is inserted into the connecting rod mounting sleeve and is provided with a guide gear, one end of the two connecting rods is rotatably connected to the two handle rods respectively, and the other end is rotatably connected to the upper end of the second connecting rod, the lower end of the second connecting rod is inserted into the connecting rod mounting sleeve and is provided with a vertically arranged second rack, and the guide gear is meshed with the second rack.

5. The electric power steering device according to claim 1, characterized in that A handle assembly is provided on the upper part of the lifting rod, and the handle assembly includes a fixing part, two handle rods symmetrically installed at both ends of the fixing part, and a rotating connecting rod. A connecting rod sliding cavity is opened inside the screw, one end of the rotating connecting rod is inserted into the connecting rod sliding cavity and can slide up and down along the connecting rod sliding cavity, and the other end extends into the fixing part and is connected to a first bevel gear. Two second bevel gears located on both sides of the first bevel gear and adapted to the first bevel gear are provided inside the fixing part, and third bevel gears adapted to the second bevel gear are respectively provided at the rotating connection points between the two handle rods and the fixing part.

6. A smart electric suitcase, characterized in that: The invention comprises a saddle-able box and the steering device according to any one of claims 1 to 5.

7. The smart electric suitcase according to claim 6, characterized in that: The box body comprises a controller, a slide rail fixed inside the box body, and a telescopic rod installed on the slide rail and capable of sliding along the slide rail and protruding out of the box body. The telescopic rod is rotatably connected to the fixed rod.

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