Foldable trolley

Abstract

The utility model relates to the technical field of trolleys and discloses a foldable trolley which comprises a bottom plate, wheels are installed on the bottom face of the bottom plate, a groove is formed in the top face of the bottom plate, a first rotating shaft and a second rotating shaft are installed in the groove, a first vertical plate is installed on the outer side face of the first rotating shaft, and a second vertical plate is installed on the outer side face of the second rotating shaft. A fixing frame is installed on the top face of the second vertical plate, a support is installed on the top face of the bottom plate, a third rotating shaft is installed in the support, a square pipe is installed on the outer side face of the third rotating shaft, a limiting groove is formed in the support, and a first limiting block and a spring are installed in the limiting groove. The first vertical plate and the second vertical plate are sequentially rotated and can rotate around the central axis of the first rotating shaft and the central axis of the second rotating shaft respectively, so that the device can be erected or put back into the groove, and when the device is erected, unstable or irregular objects such as balls and the like can be conveyed by the device.

Description

Technical Field

[0001] The utility model relates to the technical field of trolleys, in particular to a foldable trolley. Background Art

[0002] A trolley is a common transport tool, which is mainly composed of wheels, a frame and a handle. Its main function is to help people carry items from one place to another, especially for those occasions where heavy objects need to be carried manually or it is inconvenient to use mechanical transport equipment. In order to facilitate users to carry, transport or store the trolley, a foldable trolley is proposed.

[0003] According to the search, the Chinese patent document, announcement number: CN218661862U, discloses a foldable multifunctional trolley, which can be rotated by rotating the vertical tube. When the vertical tube is rotated to a vertical state, it can be fixed by the provided square tube, which realizes the normal use of the trolley. When the vertical tube is rotated to a horizontal state, the vertical tube can be stably stored. However, in actual use, the device can only transport some objects with fixed shapes, and cannot transport some unstable or irregular objects such as balls; in addition, the device cannot effectively adjust the length of the vertical tube, so it cannot make corresponding changes in different usage occasions, which reduces the overall practicality of the device. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a foldable trolley, which has the advantages of being easy to operate, convenient to store and carry, and flexible in adjusting the handle length, thereby solving the above-mentioned technical problems.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a foldable trolley comprises a base plate, a wheel is installed on the bottom surface of the base plate, a groove is opened on the top surface of the base plate, a first rotating shaft and a second rotating shaft are installed inside the groove, a first vertical plate is fixedly installed on the outer side surface of the first rotating shaft, a second vertical plate is fixedly installed on the outer side surface of the second rotating shaft, a fixing frame is installed on the top surface of the second vertical plate, a support is fixedly installed on the top surface of the base plate, a third rotating shaft is installed inside the support, a square tube is installed on the outer side surface of the third rotating shaft, a limiting groove is opened inside the support, a first limiting block and a spring are installed inside the limiting groove, a pull rod is fixedly installed on the outer side surface of the first limiting block, a second limiting block is slidably installed inside the square tube, a handle is fixedly installed on the top surface of the second limiting block, and a threaded rod is threadedly connected to the outer side surface of the square tube.

[0008] Preferably, the number of the first rotating shaft, the second rotating shaft, the first vertical plate and the second vertical plate are all set to two, and the horizontal installation heights of the two second rotating shafts are higher than the horizontal installation heights of the two first rotating shafts, and the horizontal installation height of one of the second rotating shafts is higher than the horizontal installation height of the other second rotating shaft.

[0009] Through the above technical solution, the two first vertical plates and the second vertical plate are rotated in sequence, and they can respectively rotate around the central axis of the first rotating shaft and the second rotating shaft, so that they can be effectively erected or put back into the inside of the groove. When they are erected, the device can transport some unstable or irregular objects such as balls. When they are put down, the two first vertical plates will move to the bottom of the groove, and then the second vertical plate on the outer side of the second rotating shaft with a lower position can be put back on the top surface of the first vertical plate, and the other second vertical plate can be put back on the top surface of this second vertical plate. Therefore, while folding and storage are convenient, the flatness and stability of the top surface of the bottom plate can also be guaranteed, effectively improving the overall practicality of the device.

[0010] Preferably, the number of the wheels and the number of the fixing frames are both four.

[0011] Through the above technical solution, the four wheels can facilitate users to move and transport the device, and the four fixing frames can be installed at the connection between the first vertical plate and the second vertical plate to fix them to each other, which is also convenient for disassembly and assembly, thereby improving the overall convenience of the device.

[0012] Preferably, the number of the support, the third rotating shaft and the square tube are all two.

[0013] Through the above technical solution, the two square tubes and parts such as handles can be rotated inside the support through two third rotating shafts, so that the square tubes and parts such as handles can be erected or folded, which is convenient for users to move or carry, thereby improving the overall convenience of the device.

[0014] Preferably, the number of the limiting groove, the first limiting block, the spring and the pull rod is two, and one end of the spring away from the limiting groove is fixedly connected to the outer surface of the first limiting block.

[0015] Through the above technical solution, when the square tube is erected from the top surface of the base plate, the square tube will first contact the inclined surface of the first limit block, and then the square tube will continue to move to squeeze the first limit block and slide inside the limit groove. When the square tube is completely vertical, it just leaves the position of the first limit block. At this time, the first limit block can be restored to its original position under the action of the spring, and the first limit block can effectively limit the position of the square tube; similarly, when the square tube needs to be folded, only the two pull rods need to be pulled outward, and the pull rods drive the first limit block to move outward and leave the position of the square tube, and the square tube can be retracted to the top surface of the base plate, thereby improving the overall stability and convenience of the device.

[0016] Preferably, the number of the second limit block and the number of the threaded rods are both provided with two, and two slide grooves are provided on the outer side of the handle, and rubber pads are installed on the inner sides of the two threaded rods, and the two rubber pads are correspondingly installed inside the two slide grooves.

[0017] Through the above technical solution, when the two threaded rods are rotated, the threaded rods can drive the rubber pad to leave the inside of the slide groove, and then pulling the handle can effectively adjust its overall length. At the same time, the two second limit blocks can effectively limit the position of the handle to prevent it from falling off, and the rubber pad can also prevent the threaded rod from falling off; when the handle needs to be fixed, it is only necessary to rotate the two threaded rods in the opposite direction to drive the rubber pad to move to the inside of the slide groove, and the rubber pad can effectively press and fix the slide groove and the handle, thereby improving the overall practicality of the device.

[0018] Compared with the prior art, the utility model provides a foldable trolley with the following beneficial effects:

[0019] 1. The utility model rotates the two first vertical boards and the second vertical board in sequence, and they can respectively rotate around the central axis of the first rotating shaft and the second rotating shaft, so that they can be effectively erected or put back into the inside of the groove. When they are erected, the device can transport some unstable or irregular objects such as balls. When they are put down, the two first vertical boards will move to the bottom of the groove, and then the second vertical board on the outer side of the second rotating shaft with a lower position can be put back on the top surface of the first vertical board, and the other second vertical board can be put back on the top surface of this second vertical board. Therefore, while it is convenient to fold and store, it can also ensure that the top surface of the bottom plate is flat and stable; in addition, four fixing frames are installed at the connection between the first vertical board and the second vertical board to fix them to each other, and it is also convenient to disassemble and assemble, thereby improving the convenience of the device as a whole.

[0020] 2. The utility model can make the square tube and parts such as the handle rotate inside the support through two third rotating shafts. When the square tube is erected from the top surface of the bottom plate, the square tube will first contact the inclined surface of the first limit block. Then the square tube continues to move to squeeze the first limit block and slide inside the limit groove. When the square tube is completely vertical, it just leaves the position of the first limit block. At this time, the first limit block can be restored to its original position under the action of the spring. The first limit block can effectively limit the position of the square tube. Similarly, when the square tube needs to be folded, only the two pull rods need to be pulled outward, and the pull rods drive the first limit block to move outward and When the square tube leaves the position, the square tube can be retracted to the top surface of the bottom plate, thereby improving the overall stability and convenience of the device; in addition, when the two threaded rods are rotated, the threaded rods can drive the rubber pad to leave the interior of the slide groove, and then the overall length can be effectively adjusted by pulling the handle. At the same time, the two second limit blocks can effectively limit the position of the handle to prevent it from falling off, and the rubber pad can also prevent the threaded rod from falling off; when the handle needs to be fixed, it is only necessary to rotate the two threaded rods in the opposite direction to drive the rubber pad to move to the interior of the slide groove, and the rubber pad can effectively press and fix the slide groove and the handle, thereby improving the overall practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a right side view schematic diagram of the first vertical plate and other parts of the structure of the utility model;

[0023] Figure 3 It is a three-dimensional cross-sectional schematic diagram of the structural support and other parts of the utility model;

[0024] Figure 4 It is a three-dimensional cross-sectional schematic diagram of the structural square tube and other parts of the utility model.

[0025] Among them: 1. bottom plate; 2. wheel; 3. groove; 4. first rotating shaft; 5. second rotating shaft; 6. first vertical plate; 7. second vertical plate; 8. fixing frame; 9. support; 10. third rotating shaft; 11. square tube; 12. limit groove; 13. first limit block; 14. spring; 15. pull rod; 16. second limit block; 17. handle; 18. threaded rod; 19. slide groove; 20. rubber pad. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-4 A foldable trolley comprises a bottom plate 1, a wheel 2 is installed on the bottom surface of the bottom plate 1, a groove 3 is opened on the top surface of the bottom plate 1, a first rotating shaft 4 and a second rotating shaft 5 are installed inside the groove 3, a first vertical plate 6 is fixedly installed on the outer side surface of the first rotating shaft 4, a second vertical plate 7 is fixedly installed on the outer side surface of the second rotating shaft 5, a fixing frame 8 is installed on the top surface of the second vertical plate 7, a support 9 is fixedly installed on the top surface of the bottom plate 1, a third rotating shaft 10 is installed inside the support 9, a square tube 11 is installed on the outer side surface of the third rotating shaft 10, a limiting groove 12 is opened inside the support 9, a first limiting block 13 and a spring 14 are installed inside the limiting groove 12, a pull rod 15 is fixedly installed on the outer side surface of the first limiting block 13, a second limiting block 16 is slidably installed inside the square tube 11, a handle 17 is fixedly installed on the top surface of the second limiting block 16, and a threaded rod 18 is threadedly connected to the outer side surface of the square tube 11.

[0028] Specifically, the number of the first rotating shaft 4, the second rotating shaft 5, the first vertical plate 6 and the second vertical plate 7 are all two, and the horizontal installation heights of the two second rotating shafts 5 are higher than the horizontal installation heights of the two first rotating shafts 4, and the horizontal installation height of one second rotating shaft 5 is higher than the horizontal installation height of the other second rotating shaft 5. The advantage is that by rotating the two first vertical plates 6 and the second vertical plates 7 in sequence through this structure, they can rotate around the central axis of the first rotating shaft 4 and the second rotating shaft 5 respectively, and then they can be effectively erected or put back into the inside of the groove 3. When they are erected, the device can transport some unstable or irregular objects such as balls. When they are put down, the two first vertical plates 6 will move to the bottom of the groove 3, and then the second vertical plate 7 on the outer side of the second rotating shaft 5 at a lower position can be put back on the top surface of the first vertical plate 6, and the other second vertical plate 7 can be put back on the top surface of the second vertical plate 7. Therefore, while folding and storage are convenient, the top surface of the bottom plate 1 can also be guaranteed to be flat and stable, effectively improving the overall practicality of the device.

[0029] Specifically, there are four wheels 2 and four fixing frames 8. The advantage is that the four wheels 2 can facilitate users to move and transport the device, and the four fixing frames 8 can be fixed to each other by installing them at the connection between the first vertical plate 6 and the second vertical plate 7, which is convenient for assembly and disassembly, thereby improving the convenience of the device as a whole.

[0030] Specifically, the number of the support 9, the third rotating shaft 10 and the square tube 11 is two. The advantage is that the two square tubes 11 and the handle 17 and other parts can be rotated inside the support 9 through the two third rotating shafts 10, so the square tubes 11 and the handle 17 and other parts can be erected or folded, which is convenient for users to move or carry, and improves the convenience of the device as a whole.

[0031] Specifically, the number of the limiting groove 12, the first limiting block 13, the spring 14 and the pull rod 15 is two, and the end of the spring 14 away from the limiting groove 12 is fixedly connected to the outer surface of the first limiting block 13. The advantage is that, through this structure, when the square tube 11 is erected from the top surface of the bottom plate 1, the square tube 11 will first contact the inclined surface of the first limiting block 13, and then the square tube 11 continues to move to squeeze and slide the first limiting block 13 inside the limiting groove 12. When the square tube 11 is completely vertical, it just leaves the position of the first limiting block 13. At this time, the first limiting block 13 can be restored to its original position under the action of the spring 14, and the first limiting block 13 can effectively limit the position of the square tube 11; similarly, when the square tube 11 needs to be folded, only the two pull rods 15 need to be pulled outward, and the pull rods 15 drive the first limiting block 13 to move outward and leave the position of the square tube 11, and the square tube 11 can be retracted to the top surface of the bottom plate 1, thereby improving the overall stability and convenience of the device.

[0032] Specifically, the number of the second limit block 16 and the threaded rod 18 is two, and two slide grooves 19 are provided on the outer side of the handle 17. The inner side of the two threaded rods 18 are installed with rubber pads 20, and the two rubber pads 20 are installed inside the two slide grooves 19. The advantage is that through this structure, when the two threaded rods 18 are rotated, the threaded rods 18 can drive the rubber pads 20 to leave the inside of the slide groove 19, and then the handle 17 can be pulled to effectively adjust its overall length. At the same time, the two second limit blocks 16 can effectively limit the position of the handle 17 to prevent it from falling off, and the rubber pads 20 can also prevent the threaded rods 18 from falling off; when the handle 17 needs to be fixed, it only needs to rotate the two threaded rods 18 in the opposite direction to drive the rubber pads 20 to move to the inside of the slide groove 19, and the rubber pads 20 can effectively press and fix the slide groove 19 and the handle 17, thereby improving the overall practicality of the device.

[0033] When in use, by rotating the two first vertical plates 6 and the second vertical plate 7 in sequence, they can respectively rotate around the central axis of the first rotating shaft 4 and the second rotating shaft 5, and then they can be effectively erected or put back into the inside of the groove 3. When they are erected, the device can transport some unstable or irregular objects such as balls. When they are put down, the two first vertical plates 6 will move to the bottom of the groove 3, and then the second vertical plate 7 on the outer side of the second rotating shaft 5 at a lower position can be put back on the top surface of the first vertical plate 6, and the other second vertical plate 7 can be put back on the top surface of this second vertical plate 7. Therefore, while it is convenient to fold and store, it can also ensure that the top surface of the bottom plate 1 is flat and stable; in addition, the four fixing frames 8 are installed at the connection between the first vertical plate 6 and the second vertical plate 7 to fix them to each other, and it is also convenient to disassemble and assemble, thereby improving the convenience of the device as a whole; through the two third rotating shafts 10, the square tube 11 and the handle 17 and other parts can be rotated inside the support 9. When the square tube 11 is erected from the top surface of the bottom plate 1, the square tube 11 will first contact the inclined surface of the first limit block 13, and then the square tube 11 continues to move to squeeze the first limit block 13 and Sliding inside the limiting groove 12, when the square tube 11 is completely vertical, it just leaves the position of the first limiting block 13. At this time, the first limiting block 13 can be restored to its original position under the action of the spring 14, and the first limiting block 13 can effectively limit the position of the square tube 11; similarly, when the square tube 11 needs to be folded, it is only necessary to pull the two pull rods 15 outward, and the pull rods 15 drive the first limiting block 13 to move outward and leave the position of the square tube 11, and the square tube 11 can be retracted to the top surface of the bottom plate 1, thereby improving the overall stability and convenience of the device; in addition, when the two threads are turned, When the handle 17 is moved, the threaded rod 18 can drive the rubber pad 20 to leave the inside of the slide groove 19, and then the handle 17 can be pulled to effectively adjust its overall length. At the same time, the two second limit blocks 16 can effectively limit the position of the handle 17 to prevent it from falling off, and the rubber pad 20 can also prevent the threaded rod 18 from falling off; when the handle 17 needs to be fixed, it is only necessary to rotate the two threaded rods 18 in the opposite direction to drive the rubber pad 20 to move to the inside of the slide groove 19, and the rubber pad 20 can effectively press and fix the slide groove 19 and the handle 17, thereby improving the overall practicality of the device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foldable trolley, comprising a bottom plate (1), characterized in that: The bottom surface of the base plate (1) is provided with a wheel (2); the top surface of the base plate (1) is provided with a groove (3); a first rotating shaft (4) and a second rotating shaft (5) are installed inside the groove (3); a first vertical plate (6) is fixedly installed on the outer side surface of the first rotating shaft (4); a second vertical plate (7) is fixedly installed on the outer side surface of the second rotating shaft (5); a fixing frame (8) is installed on the top surface of the second vertical plate (7); a support (9) is fixedly installed on the top surface of the base plate (1); a third rotating shaft (10) is installed inside the support (9); ), a square tube (11) is installed on the outer side surface of the third rotating shaft (10), a limiting groove (12) is provided inside the support (9), a first limiting block (13) and a spring (14) are installed inside the limiting groove (12), a pull rod (15) is fixedly installed on the outer side surface of the first limiting block (13), a second limiting block (16) is slidably installed inside the square tube (11), a handle (17) is fixedly installed on the top surface of the second limiting block (16), and a threaded rod (18) is threadedly connected to the outer side surface of the square tube (11).

2. A foldable trolley according to claim 1, characterized in that: The number of the first rotating shaft (4), the second rotating shaft (5), the first vertical plate (6) and the second vertical plate (7) is set to two, and the horizontal installation heights of the two second rotating shafts (5) are higher than the horizontal installation heights of the two first rotating shafts (4), and the horizontal installation height of one of the second rotating shafts (5) is higher than the horizontal installation height of the other second rotating shaft (5).

3. A foldable trolley according to claim 1, characterized in that: The number of the wheels (2) and the number of the fixing frames (8) are both four.

4. A foldable trolley according to claim 1, characterized in that: The number of the support (9), the third rotating shaft (10) and the square tube (11) is two.

5. A foldable trolley according to claim 1, characterized in that: The number of the limiting groove (12), the first limiting block (13), the spring (14) and the pull rod (15) is two, and one end of the spring (14) away from the limiting groove (12) is fixedly connected to the outer surface of the first limiting block (13).

6. A foldable trolley according to claim 1, characterized in that: The number of the second limit block (16) and the threaded rod (18) is two, and the outer side surface of the handle (17) is provided with two slide grooves (19), and the inner sides of the two threaded rods (18) are installed with rubber pads (20), and the two rubber pads (20) are correspondingly installed inside the two slide grooves (19).

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