Multifunctional draw-bar box

Abstract

The present invention relates to a multifunctional draw-bar box, comprising: a box body having a placement groove formed therein; the notch is formed in the bottom of the box body and is not communicated with the placing groove; the movable frame is movably arranged in the notch; the universal wheels are movably mounted at the bottom of the movable frame, and the number of the universal wheels is four; the lifting assembly is arranged in the notch and used for driving the movable frame to move up and down; the positioning assembly is arranged in the notch, located above the movable frame and used for limiting and fixing the universal wheels and keeping the universal wheels at the same angle. According to the multifunctional draw-bar box provided by the invention, the effect of limiting and fixing the universal wheel frame body is achieved through the cooperation of a plurality of components such as the positioning plate, the limiting rod and the push plate, and the situation that the universal wheels are damaged due to bumping in the consignment process is further ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of trolley cases, in particular to a multifunctional trolley case. Background Art

[0002] A trolley case is a suitcase with a retractable handle and wheels for easy towing. Modern trolley cases not only have basic storage functions, but also have a variety of practical features; for example, some trolley cases are equipped with USB charging ports, which are convenient for users to charge mobile phones or other electronic devices when they are away. For business people who often need to travel, trolley cases are essential equipment.

[0003] During business trips, suitcases often need to be checked in. During the check-in process, since multiple suitcases are piled together, they may be damaged due to collision, squeezing or improper handling, especially protruding parts such as wheels. In addition, the wheels may also be damaged when the consignor is carrying the suitcases. The wheels of existing suitcases are usually designed to rotate 360 ​​degrees. The bumps during the check-in process may cause the wheels to shake, which also increases the risk of wheel damage.

[0004] Therefore, it is necessary to design a multifunctional trolley case that can protect wheels from being damaged in the checked state. Summary of the invention

[0005] Based on this, it is necessary to provide a multifunctional trolley case that can ensure that the wheels will not be damaged in the checked state in order to solve the above technical problems.

[0006] The present invention provides a multifunctional suitcase, comprising:

[0007] The box body has a placement slot arranged inside;

[0008] A notch is opened at the bottom of the box body and is not intercommunication with the placement slot;

[0009] A movable frame, movably arranged in the slot;

[0010] Universal wheels, movably mounted at the bottom of the movable frame, with a number of 4;

[0011] A lifting assembly, disposed in the notch, for driving the movable frame to move up and down;

[0012] A positioning assembly is arranged in the notch and above the movable frame, and is used to limit and fix the universal wheel to maintain the same angle.

[0013] In one embodiment, the positioning assembly includes a fixing ring, and the number of the fixing rings is set to 4. The multiple fixing rings are connected together by a connecting frame. The top of the universal wheel is rotatably connected to a movable rod and the movable rod movably passes through the movable frame. A limiting rod is fixedly provided at one end of the movable rod away from the universal wheel. A positioning plate is fixedly provided in the fixing ring, and the bottom of the positioning plate is set to a circular arc shape. The limiting rod is movably abutted against the positioning plate. A circular plate is rotatably embedded in the fixing ring, and a push plate is fixedly provided at the bottom of the circular plate, and the push plate is movably abutted against the limiting rod.

[0014] In one embodiment, a round rod is fixedly provided on the top of the circular plate, and a vertical groove, a curved groove and a straight groove are respectively opened on the round rod from top to bottom. A cross bar is provided on one side of the round rod, and the cross bar is slidably fitted with the vertical groove, the curved groove and the straight groove, and the cross bar is fixedly connected to the top of the groove.

[0015] In one embodiment, the lifting assembly includes a screw rod, a circular groove is opened on one side of the box body, the circular groove is connected with the notch but not connected with the placement groove, the screw rod is rotatably arranged in the circular groove and a movable cylinder is movably sleeved on the outside, the movable cylinder is slidably connected to the circular groove and the end is fixedly connected to the movable frame.

[0016] In one of the embodiments, a vertical plate is fixedly provided in the groove, a movable plate is slidably provided on the vertical plate, the movable plate is fixedly connected to the movable frame, a movable frame is slidably provided on one side of the movable plate, the movable frame is fixedly connected to the connecting frame, a rotating plate is movably connected to one end of the movable frame away from the movable plate, a limiting ring is movably connected to one side of the rotating plate, a fixed plate is fixedly provided on the movable plate, a limiting groove is provided on the fixed plate, and the limiting groove is movably abutted against the limiting ring.

[0017] In one of the embodiments, a positioning ring is movably connected to one side of the rotating plate relative to the limiting ring, a clamping plate is fixedly provided on one side of the vertical plate, a clamping groove is provided on the clamping plate, and the positioning ring is movably abutted against the clamping plate.

[0018] In one of the embodiments, cross plates are axially symmetrically fixed at both ends of the connecting frame, grooves are axially symmetrically opened at both ends of the cross plate, a wiping pad is movably arranged in the groove, a rotating rod is movably penetrated by the center of the cross plate, both ends of the rotating rod movably penetrate the wiping pad and are threadably connected with the wiping pad, and the two threads have opposite rotation directions.

[0019] In one of the embodiments, a notch is opened in the center of the horizontal plate, the rotating rod is rotatably connected to the notch and a driving gear is provided on the outer fixed sleeve, and driving racks are axially symmetrically fixed at both ends of the notch, and the driving rack movably passes through the connecting frame and meshes with the driving gear for transmission.

[0020] In one of the embodiments, a rotating shaft is movably disposed at the center of the universal wheel, and a rotating gear is fixedly disposed at one end of the rotating shaft.

[0021] In one of the embodiments, a plurality of positioning racks are fixedly disposed in the notch, and the positioning racks movably penetrate the movable frame and mesh with the rotating gear for transmission.

[0022] The above-mentioned multifunctional trolley case can drive the movable frame and the universal wheel to enter the groove through the lifting assembly, so as to avoid damage to the universal wheel during consignment; the universal wheel frame is limited and fixed by the cooperation of multiple components such as the positioning plate, the limit rod and the push plate, further ensuring that the universal wheel will not be damaged due to bumps during the consignment process; the universal wheel body is cleaned by the cooperation of multiple components such as the cleaning pad, the rotating gear and the rotating shaft, thereby ensuring the cleanliness of the universal wheel body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the back structure of the present invention as a whole;

[0026] Figure 3 It is a structural schematic diagram of the notch in the present invention;

[0027] Figure 4 It is a structural schematic diagram of the lifting assembly in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the curved groove in the present invention;

[0029] Figure 6 for Figure 5 The enlarged schematic diagram of part A in the middle;

[0030] Figure 7 It is a structural schematic diagram of the positioning component in the present invention;

[0031] Figure 8 It is a structural schematic diagram of the vertical plate in the present invention;

[0032] Fig. 9 It is a schematic diagram of the structure of the positioning ring in the present invention;

[0033] Fig.10 It is a schematic diagram of the structure of the groove in the present invention.

[0034] Reference numerals:

[0035] 1. Box; 101. Placement slot; 102. Notch; 103. Round slot; 2. Movable frame; 3. Universal wheel; 4. Lifting assembly; 41. Screw rod; 42. Moving cylinder; 5. Positioning assembly; 51. Fixed ring; 52. Positioning plate; 53. Round plate; 54. Push plate; 6. Connecting frame; 7. Movable rod; 8. Limit rod; 9. Round rod; 91. Vertical slot; 92. Curved slot; 93. Straight slot; 10. Crossbar; 1 1. Vertical plate; 12. Movable plate; 13. Moving frame; 14. Rotating plate; 15. Limiting ring; 16. Fixed plate; 161. Limiting groove; 17. Positioning ring; 18. Clamping plate; 181. Clamping groove; 19. Horizontal plate; 191. Groove; 192. Notch; 20. Wiping pad; 21. Rotating rod; 22. Driving gear; 23. Driving rack; 24. Rotating shaft; 25. Rotating gear; 26. Positioning rack. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are for illustrative purposes only and do not represent the only implementation method.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in the specification of the present invention have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the specification of the present invention includes any and all combinations of one or more related listed items.

[0041] Combine the following Figure 1-Figure 10 The invention discloses a multifunctional suitcase.

[0042] like Figure 1-Figure 7 As shown, in one embodiment, it includes a box body 1, a placement slot 101, a notch 102, a movable frame 2, a universal wheel 3, a lifting assembly 4 and a positioning assembly 5;

[0043] The placement slot 101 is opened inside the box body 1; the slot 102 is opened at the bottom of the box body 1 and is not intercommunication with the placement slot 101; the movable frame 2 is movably arranged in the slot 102; the universal wheel 3 is movably installed at the bottom of the movable frame 2, and the number is set to 4; the lifting component 4 is arranged in the slot 102, and is used to drive the movable frame 2 to move up and down; the positioning component 5 is arranged in the slot 102, located above the movable frame 2, and is used to limit and fix the universal wheel 3 to maintain the same angle.

[0044] Specifically, various items such as clothes and personal belongings can be placed in the placement slot 101 opened in the box body 1. The universal wheel 3 facilitates the movement of the trolley case. When it needs to be checked in, the lifting assembly 4 can be used to drive the movable frame 2 and the universal wheel 3 to move upward to the inside of the slot 102, and the universal wheel 3 moves to the inside of the slot 102. In this way, during check-in, the universal wheel 3 can be prevented from being located outside the slot 102 and causing damage. In the process of moving the universal wheel 3 to the inside of the slot 102, the positioning assembly 5 can be used to ensure that the universal wheel 3 maintains a fixed angle and cannot rotate anymore. This can further ensure that the universal wheel 3 remains stable during check-in and will not be damaged.

[0045] See also Figure 4-Figure 7 As shown, in this embodiment, the positioning assembly 5 includes a fixed ring 51, and the number of the fixed rings 51 is set to 4. The multiple fixed rings 51 are connected together by a connecting frame 6. The top of the universal wheel 3 is rotatably connected to a movable rod 7, and the movable rod 7 movably passes through the movable frame 2. A limiting rod 8 is fixedly set at one end of the movable rod 7 away from the universal wheel 3. A positioning plate 52 is fixedly set in the fixed ring 51, and the bottom of the positioning plate 52 is set to a circular arc shape. The limiting rod 8 is movably abutted against the positioning plate 52. A circular plate 53 is rotatably embedded in the fixed ring 51, and a push plate 54 is fixedly set at the bottom of the circular plate 53, and the push plate 54 is movably abutted against the limiting rod 8.

[0046] Specifically, before checking in, the suitcase can be tilted and placed on the ground, and the lifting assembly 4 can be used to drive the movable frame 2 and the universal wheel 3 to move toward the inside of the slot 102. The upward movement of the universal wheel 3 will drive the movable rod 7 and the limit rod 8 to move upward, thereby entering the interior of the fixed ring 51 and causing the limit rod 8 to abut against the bottom of the positioning plate 52. Since the bottom of the positioning plate 52 is designed in an arc shape, the limit rod 8 continues to move upward while in contact with it, and the limit rod 8 will be deflected, thereby driving the movable rod 7 and the universal wheel 3 to rotate a certain angle. This scenario is applied to the limit rod 8 being able to abut against the positioning plate 52 when the universal wheel 3 moves upward. If the limit rod 8 moves upward with the universal wheel 3 and the limit rod 8 is not directly under the positioning plate 52, the limit rod 8 will not contact the positioning plate 52. Then the circular plate 53 can be rotated. The counterclockwise rotation of the circular plate 53 will drive the push plate 54 to rotate. During the rotation of the push plate 54 in the fixing ring 51, it will abut against the limit rod 8, thereby pushing the limit rod 8 to rotate until one end of the limit rod 8 abuts against the side of the positioning plate 52. In this way, no matter what angle the universal wheel 3 is before rising, the limit rod 8 will abut against the side of the positioning plate 52 after reaching the inside of the fixing ring 51, which can ensure that the universal wheel 3 always maintains an angle in a limited state.

[0047] See also Figure 4-Figure 6As shown, in this embodiment, a round rod 9 is fixedly provided on the top of the circular plate 53, and a vertical groove 91, a curved groove 92 and a straight groove 93 are respectively opened on the round rod 9 from top to bottom. A cross bar 10 is provided on one side of the round rod 9, and the cross bar 10 is slidably fitted with the vertical groove 91, the curved groove 92 and the straight groove 93, and the cross bar 10 is fixedly connected to the top of the notch 102.

[0048] Specifically, when the limit rod 8 moves into the fixed ring 51, the movable frame 2 and the connecting frame 6 are moved upward synchronously, and the fixed ring 51 and the limit rod 8 also move upward synchronously. At this time, the circular plate 53 and the round rod 9 also move upward synchronously, and the cross bar 10 will first slide along the vertical groove 91 and then move with the curved groove 92. When the cross bar 10 slides along the curved groove 92, it will drive the round rod 9 to rotate counterclockwise, thereby driving the circular plate 53 and the push plate 54 to rotate counterclockwise so that the limit rod 8 abuts against the side of the positioning plate 52, and then the cross bar 10 will contact the straight groove 93 section. During this process, the push plate 54 will not move and the limit rod 8 will always be squeezed on the positioning plate 52.

[0049] See also Figure 2 and Figure 4 As shown, in this embodiment, the lifting assembly 4 includes a screw rod 41, a circular groove 103 is opened on one side of the box body 1, the circular groove 103 is connected with the notch 102 but is not connected with the placement groove 101, the screw rod 41 is rotatably set in the circular groove 103 and a movable cylinder 42 is provided on the outer movable sleeve, the movable cylinder 42 is slidably connected to the circular groove 103 and the end is fixedly connected to the movable frame 2.

[0050] Specifically, before checking in, the screw rod 41 is rotated. The rotation of the screw rod 41 in the circular groove 103 will drive the moving cylinder 42 to move upward along the circular groove 103. The upward movement of the moving cylinder 42 will drive the movable frame 2 to move upward, thereby driving the universal wheel 3 to enter the slot 102, thereby achieving the purpose of protecting the universal wheel 3.

[0051] See also Figure 8 and Fig. 9 As shown, in the present embodiment, a vertical plate 11 is fixedly provided in the notch 102, a movable plate 12 is slidably provided on the vertical plate 11, the movable plate 12 is fixedly connected to the movable frame 2, a moving frame 13 is slidably provided on one side of the movable plate 12, the moving frame 13 is fixedly connected to the connecting frame 6, one end of the movable frame 13 away from the movable plate 12 is movably connected to a rotating plate 14, one side of the rotating plate 14 is movably connected to a limiting ring 15, a fixed plate 16 is fixedly provided on the movable plate 12, a limiting groove 161 is provided on the fixed plate 16, and the limiting groove 161 is movably abutted against the limiting ring 15.

[0052] Specifically, the upward movement of the movable frame 2 will drive the movable plate 12 to move upward, and the upward movement of the movable plate 12 along the vertical plate 11 will drive the fixed plate 16 to move upward. During the upward movement of the fixed plate 16, the limit groove 161 will abut against the limit ring 15, and the limit ring 15 is located in the limit groove 161. As the movable plate 12 moves upward, the upward movement of the limit ring 15 will drive the rotating plate 14 to move upward, thereby driving the movable frame 13 and the connecting frame 6 to move upward together, so that the movable frame 2 and the connecting frame 6 can move upward synchronously. During this process, the push plate 54 will rotate in the fixed ring 51 so that the limit rod 8 abuts against the positioning plate 52, ensuring that the universal wheel 3 maintains a fixed angle.

[0053] See also Fig. 9 As shown, in this embodiment, a positioning ring 17 is movably connected to one side of the rotating plate 14 relative to the limiting ring 15, and a clamping plate 18 is fixedly provided on one side of the vertical plate 11. The clamping plate 18 has a clamping groove 181, and the positioning ring 17 is movably abutted against the clamping plate 18.

[0054] Specifically, in the initial state, the positioning ring 17 is located in the slot 181 opened by the card plate 18, which can ensure the stability of the rotating plate 14, the movable frame 13 and the connecting frame 6. At this time, the limit ring 15 is located on one side, and the limit groove 161 is located below the limit ring 15. Then the movable frame 2 moves upward so that the limit groove 161 moves upward and contacts with the limit ring 15, thereby driving the limit ring 15 to move upward. The upward movement of the limit ring 15 will drive the rotating plate 14 to move upward so that the positioning ring 17 is no longer in contact with the slot 181. Then, when the movable frame 2 moves downward, it will drive the rotating plate 14, the positioning ring 17 and the limit ring 15 to descend synchronously. When the positioning ring 17 contacts with the slot 181, the rotating plate 14 stops descending, the limit ring 15 is no longer in contact with the limit groove 161, and the rotating plate 14, the positioning ring 17 and the limit ring 15 return to the initial state.

[0055] See also Figure 5 and Fig.10 As shown, in this embodiment, transverse plates 19 are axially symmetrically fixed at both ends of the connecting frame 6, grooves 191 are axially symmetrically opened at both ends of the transverse plate 19, a wiping pad 20 is movably arranged in the groove 191, a rotating rod 21 is movably penetrated by the center of the transverse plate 19, both ends of the rotating rod 21 movably penetrate the wiping pad 20 and are threadably connected thereto, and the two threads have opposite rotation directions.

[0056] Specifically, the upward movement of the movable frame 2 will drive the universal wheel 3 to move upward. When the universal wheel 3 moves to the inside of the slot 102, the height of the cross plate 19 is slightly lower than the universal wheel 3. Then the movable frame 2 and the connecting frame 6 move upward synchronously. During this process, the push plate 54 will rotate to limit the limit rod 8, and the movable rod 7 cannot drive the universal wheel 3 frame to rotate. At the same time, the rotating rod 21 is rotated. The rotation of the rotating rod 21 will drive the wiping pad 20 in the grooves 191 on both sides to move to the bottom of the universal wheel 3 and contact it. At this time, the universal wheel 3 body is rotated to rotate the wheel body, and the universal wheel 3 frame cannot rotate. The wheel itself rotates so that all its positions are in contact with the cleaning pad, which can remove various impurities such as dust on the body and clean the universal wheel 3.

[0057] See also Figure 4 and Fig.10 As shown, in this embodiment, a notch 192 is opened in the center of the horizontal plate 19, the rotating rod 21 is rotatably connected to the notch 192 and a driving gear 22 is fixedly sleeved on the outside, and driving racks 23 are axially symmetrically fixed at both ends of the notch 102, and the driving rack 23 movably passes through the connecting frame 6 and meshes with the driving gear 22 for transmission.

[0058] Specifically, during the synchronous upward movement of the movable frame 2 and the connecting frame 6, the driving gear 22 will engage with the driving rack 23 to rotate the driving gear 22. The rotation of the driving gear 22 in the notch 192 will drive the rotating rod 21 to rotate, so that the cleaning pads on both sides move to the bottom of their corresponding universal wheels 3 to facilitate cleaning.

[0059] See also Figure 7 As shown, in this embodiment, a rotating shaft 24 is movably provided at the center of the universal wheel 3 , and a rotating gear 25 is fixedly provided at one end of the rotating shaft 24 .

[0060] Specifically, when the cleaning pad is located below the universal wheel 3 body, the rotating gear 25 is rotated. The rotation of the rotating gear 25 drives the rotating shaft 24 and the universal wheel 3 body to rotate so that the wheel is fully in contact with the cleaning pad, which makes it easy to clean the dust on the universal wheel 3 body.

[0061] See also Figure 5 and Figure 7 As shown, in this embodiment, a plurality of positioning racks 26 are fixedly disposed in the notch 102 . The positioning racks 26 movably penetrate the movable frame 2 and mesh with the rotating gear 25 for transmission.

[0062] Specifically, during the synchronous upward movement of the movable frame 2 and the connecting frame 6, the cross bar 10 will contact the curved groove 92 and the straight groove 93 sections in turn. When the cross bar 10 contacts the curved groove 92, the push plate 54 will limit the universal wheel 3, and the cleaning pad will move to the bottom of the universal wheel 3. Then, when the cross bar 10 contacts the straight groove 93 section, the rotating gear 25 will engage with the positioning rack 26 to rotate the rotating gear 25 and the rotating shaft 24. The rotating shaft 24 will rotate to drive the universal wheel 3 body to rotate, thereby cleaning the universal wheel 3.

[0063] During implementation, various items such as clothes and personal belongings can be placed in the placement groove 101, and the universal wheel 3 is convenient for moving the trolley case. When it is necessary to check in, the screw rod 41 is rotated, and the rotation of the screw rod 41 in the circular groove 103 will drive the moving cylinder 42 to move upward along the circular groove 103. The upward movement of the moving cylinder 42 will drive the movable frame 2 to move upward, thereby driving the universal wheel 3 to enter the groove 102, so as to achieve the purpose of protecting the universal wheel 3. In the initial state, the positioning ring 17 is located in the card groove 181 opened by the card plate 18, which can ensure the stability of the rotating plate 14, the movable frame 13 and the connecting frame 6. At this time, the limiting ring 15 is located on one side, and the limiting groove 161 is located below the limiting ring 15. The movable frame 2 moves upward so that the limiting groove 161 moves upward, thereby The limit ring 15 contacts with the limit ring 15 and drives the limit ring 15 to move upward. The upward movement of the limit ring 15 drives the rotating plate 14 to move upward so that the positioning ring 17 is no longer in contact with the slot 181. The movable frame 2 and the connecting frame 6 move upward synchronously. At the same time, the upward movement of the universal wheel 3 drives the movable rod 7 and the limit rod 8 to move upward, thereby entering the interior of the fixed ring 51 and making the limit rod 8 abut against the bottom of the positioning plate 52. Since the bottom of the positioning plate 52 is an arc-shaped design, the limit rod 8 continues to move upward while contacting it. The limit rod 8 will be deflected, thereby driving the movable rod 7 and the universal wheel 3 to rotate a certain angle. This scenario is applied to the limit rod 8 being able to abut against the positioning plate 52 when the universal wheel 3 moves upward. If the limit rod 8 moves with the universal wheel 3 When the limit rod 8 moves upward and the limit rod 8 is not directly under the positioning plate 52, the limit rod 8 will not contact the positioning plate 52. Subsequently, the movable frame 2 and the connecting frame 6 move upward synchronously, and the cross bar 10 contacts the curved groove 92. When the cross bar 10 slides along the curved groove 92, it will drive the round rod 9 to rotate counterclockwise, thereby driving the round plate 53 and the push plate 54 to rotate counterclockwise so that the limit rod 8 abuts against the side of the positioning plate 52. Subsequently, the cross bar 10 will contact the straight groove 93. During this process, the push plate 54 will not move and will always squeeze the limit rod 8 on the positioning plate 52. In this way, no matter what angle the universal wheel 3 is at before rising, the limit rod 8 will abut against the side of the positioning plate 52 after reaching the inside of the fixed ring 51, which can ensure that the universal wheel 3 always maintains an angle. In the limited position state, in addition, during the synchronous upward movement of the movable frame 2 and the connecting frame 6, the driving gear 22 will mesh with the driving rack 23, so that the driving gear 22 rotates, and the rotation of the driving gear 22 in the notch 192 will drive the rotating rod 21 to rotate, so that the cleaning pads on both sides move to the bottom of their corresponding universal wheels 3. At the same time, during the synchronous upward movement of the movable frame 2 and the connecting frame 6, the cross bar 10 will successively contact the curved groove 92 and the straight groove 93 sections. When the cross bar 10 contacts the curved groove 92, the push plate 54 will limit the universal wheel 3, and the cleaning pad will move to the bottom of the universal wheel 3. Subsequently, when the cross bar 10 contacts the straight groove 93 sections, the rotating gear 25 will mesh with the positioning rack 26, so that the rotating gear 25 and the rotating shaft 24 rotate.The rotating shaft 24 will rotate to drive the universal wheel 3 body to rotate, thereby cleaning the universal wheel 3.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A multifunctional trolley case, characterized in that: include: The box body has a placement slot arranged inside; A notch is opened at the bottom of the box body and is not intercommunication with the placement slot; A movable frame, movably arranged in the slot; Universal wheels, movably mounted at the bottom of the movable frame, with a number of 4; A lifting assembly, disposed in the notch, for driving the movable frame to move up and down; A positioning assembly is arranged in the notch and above the movable frame, and is used to limit and fix the universal wheel to maintain the same angle.

2. The multifunctional suitcase according to claim 1, characterized in that: The positioning assembly includes a fixing ring, and the number of the fixing rings is set to 4. The multiple fixing rings are connected together by a connecting frame. The top of the universal wheel is rotatably connected to a movable rod and the movable rod movably passes through the movable frame. A limiting rod is fixedly provided at one end of the movable rod away from the universal wheel. A positioning plate is fixedly provided in the fixing ring, and the bottom of the positioning plate is set to an arc shape. The limiting rod is movably abutted against the positioning plate. A circular plate is rotatably embedded in the fixing ring, and a push plate is fixedly provided at the bottom of the circular plate, and the push plate is movably abutted against the limiting rod.

3. The multifunctional suitcase according to claim 2, characterized in that: A round rod is fixedly arranged on the top of the circular plate, and a vertical groove, a curved groove and a straight groove are respectively opened on the round rod from top to bottom. A cross bar is arranged on one side of the round rod, and the cross bar is slidably fitted with the vertical groove, the curved groove and the straight groove, and the cross bar is fixedly connected to the top of the slot.

4. The multifunctional suitcase according to claim 1, characterized in that: The lifting assembly includes a screw rod, a circular groove is opened on one side of the box body, the circular groove is connected with the notch but not connected with the placement groove, the screw rod is rotatably arranged in the circular groove and a movable cylinder is movably sleeved on the outside, the movable cylinder is slidably connected to the circular groove and the end is fixedly connected to the movable frame.

5. The multifunctional suitcase according to claim 2, characterized in that: A vertical plate is fixedly arranged in the groove, a movable plate is slidably arranged on the vertical plate, the movable plate is fixedly connected to the movable frame, a moving frame is slidably arranged on one side of the movable plate, the moving frame is fixedly connected to the connecting frame, a rotating plate is movably connected to one end of the movable frame away from the movable plate, a limiting ring is movably connected to one side of the rotating plate, a fixed plate is fixedly arranged on the movable plate, a limiting groove is provided on the fixed plate, and the limiting groove is movably abutted against the limiting ring.

6. The multifunctional trolley case according to claim 5, characterized in that: A positioning ring is movably connected to one side of the rotating plate relative to the limiting ring, a clamping plate is fixedly arranged on one side of the vertical plate, a clamping groove is provided on the clamping plate, and the positioning ring is movably abutted against the clamping plate.

7. The multifunctional suitcase according to claim 2, characterized in that: The two ends of the connecting frame are axially symmetrically fixed with transverse plates, the two ends of the transverse plate are axially symmetrically provided with grooves, a wiping pad is movably arranged in the groove, a rotating rod is movably penetrated by the center of the transverse plate, the two ends of the rotating rod movably penetrate the wiping pad and are threadably connected with the wiping pad, and the two threads have opposite rotation directions.

8. The multifunctional suitcase according to claim 7, characterized in that: A notch is provided at the center of the transverse plate, the rotating rod is rotatably connected to the notch and a driving gear is provided on the outer fixed sleeve, driving racks are axially symmetrically fixed at both ends of the notch, and the driving racks movably penetrate the connecting frame and mesh with the driving gear for transmission.

9. The multifunctional suitcase according to claim 1, characterized in that: A rotating shaft is movably disposed at the center of the universal wheel, and a rotating gear is fixedly disposed at one end of the rotating shaft.

10. The multifunctional suitcase according to claim 9, characterized in that: A plurality of positioning racks are fixedly arranged in the notch, and the positioning racks movably penetrate the movable frame and mesh with the rotating gear for transmission.

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