Portable movable cart for tire replacement

Abstract

The utility model discloses a portable tire replacement mobile cart which comprises a plastic base plate, universal wheels are movably connected to the bottom ends of roller fixing rods, a handle groove is formed in the top end of the plastic base plate, a traction handrail is installed at the top end of a handrail installation base, and a roller structure convenient to fold is arranged on one side of the plastic base plate. According to the portable tire replacement moving cart, bearing seats, roller fixing rods, universal wheels, a connecting shaft, a square pipe sleeve, a square rod, a traction plate, a spline head, a reset spring and a spline groove are arranged, when the portable tire replacement moving cart is used, the traction plate is grabbed to be pulled outwards, the traction plate drives the square rod to move outwards along the square pipe sleeve, and the square rod is driven to move outwards; the spline head on one side of the square pipe sleeve is separated from the spline groove in the side edge of the roller fixing rod, at the moment, the universal wheel is turned over towards the inner side, the function of conveniently folding and collecting the roller is achieved, and the problem that the device does not have the function of conveniently folding and collecting the roller is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mobile trolleys, in particular to a portable tire-changing mobile trolley. Background Technique

[0002] Tire replacement is the most common automobile repair item. Since automobile tires are relatively heavy, a mobile trolley is generally needed for operation during transfer.

[0003] Most of the common tire-changing mobile trolleys on the market currently are similar in structure, with a plastic chassis as the main body. A foldable handrail is installed on the top of the chassis, and there are four groups of rollers at the bottom of the chassis. There are some functional deficiencies in the actual use process, and there is room for improvement. For example, although the rollers are small in size, they also increase the height of the trolley itself, and the space occupied by the trolley when folded is still large, and it does not have the function of easily folding and retracting the rollers; secondly, when replacing tires outdoors by oneself, the tools for replacing tires need to be carried separately, which is rather troublesome, and it does not have the function of easily storing tools; in addition, when towing a tire, the tire is likely to slip off the trolley on an uneven road surface, and additional binding and fixing are required, and it does not have the function of easily binding and fixing the tire.

[0004] Now, a new type of portable tire-changing mobile trolley is proposed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a portable tire-changing mobile trolley to solve the problem of not having the function of easily folding and retracting the rollers proposed in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A portable tire-changing mobile trolley, including a plastic chassis. Two groups of bearing seats are respectively fixedly connected to the four corners at the bottom of the plastic chassis. A roller fixing rod is movably connected between one sides of the two groups of bearing seats. The bottom end of the roller fixing rod is movably connected with a universal wheel. A handle groove is arranged inside the top end of the plastic chassis. Two groups of handrail mounting seats are installed inside the handle groove. A pulling handrail is installed at the top end of the handrail mounting seat. A rubber glove is sleeved at the top end of the pulling handrail. A tool placement cavity is arranged at the middle position of the top of the plastic chassis. Belt reserved grooves are respectively arranged at the front and rear ends of the top of the plastic chassis. A first fixing rod is fixedly connected to one side inside the belt reserved groove, and a second fixing rod is fixedly connected to the other side inside the belt reserved groove. An easily retractable roller structure is arranged on one side of the plastic chassis.

[0007] The described roller structure facilitating folding and retraction includes two sets of square pipe sleeves, which are respectively fixedly connected to the front and rear ends on one side of the plastic chassis. A square rod is horizontally inserted into the interior of the square pipe sleeve. One side of the square rod is fixedly connected to a pulling plate, and the other side of the square rod is fixedly connected to a spline head. A return spring is installed between one side of the spline head and the inner wall of the plastic chassis.

[0008] Preferably, a connecting shaft is horizontally fixedly connected between one sides of the two roller fixing rods, and the roller fixing rods are symmetrically distributed about the vertical center line of the connecting shaft.

[0009] Preferably, the outer diameter of the square rod is consistent with the inner diameter of the square pipe sleeve, and the square rod can slide left and right along the interior of the square pipe sleeve.

[0010] Preferably, a spline groove is provided inside the other side of the roller fixing rod, and the shape and size of the outer part of the spline head are consistent with the shape and size of the interior of the spline groove.

[0011] Preferably, a box cover is movably hinged to one side of the top of the tool placement cavity, and the bottom end of the tool placement cavity is flush with the bottom end of the plastic chassis.

[0012] Preferably, a socket wrench is horizontally placed at one end inside the tool placement cavity, and a box wrench is horizontally placed at the other end inside the tool placement cavity.

[0013] Preferably, the first fixing rod and the second fixing rod have the same dimensions, and the tops of the first fixing rod and the second fixing rod are lower than the top of the plastic chassis.

[0014] Preferably, a metal connector is sleeved outside the first fixing rod, an elastic band is installed at one end of the metal connector, and a hook is installed at the end of the elastic band.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: This portable tire-changing mobile cart not only realizes the function of facilitating the folding and retraction of the rollers, realizes the function of facilitating the storage of tools, but also realizes the function of facilitating the binding and fixing of the tire;

[0016] (1) By providing a bearing seat, a roller fixing rod, a universal wheel, a connecting shaft, a square pipe sleeve, a square rod, a pulling plate, a spline head, a return spring and a spline groove, during use, first flip up the pulling armrest from the handle slot, tighten the bolts on the side of the armrest mounting seat to fix the position of the pulling armrest. Then, place the tire horizontally on the top of the plastic chassis and fix it. After that, hold the pulling armrest and push or pull to transfer the tire. When storing the cart, first press the pulling armrest into the handle slot, then turn the plastic chassis over, hold the pulling plate and pull it outwards. The pulling plate drives the square rod to displace outwards along the square pipe sleeve, and the spline head on one side of the square pipe sleeve disengages from the spline groove on the side of the roller fixing rod. At this time, turn the universal wheel inwards, and the roller fixing rod can rotate inwards along the bearing seat. The connecting shaft can connect the front and rear groups of roller fixing rods to make them rotate synchronously. After flipping in place, release the pulling plate, and the return spring pushes the spline head to extend forward. The spline head snaps into the spline groove, and the position of the roller fixing rod together with the universal wheel is fixed. The whole cart is in a plate shape, which can save space and realizes the function of facilitating the folding and retraction of the rollers;

[0017] (2) By providing a tool placement cavity, a box cover, a socket wrench and a sleeve wrench, during use, before going out on a field mission, first open the box cover, put tools required for changing the tire, such as a socket wrench and a sleeve wrench, into the tool placement cavity one by one, and then close the box cover. When changing the tire, the tools can be directly taken. The removed bolts and nuts can be directly put into the tool placement cavity, which saves time and effort while preventing loss and realizes the function of facilitating the storage of tools;

[0018] (3) By providing a belt reservation groove, a first fixing rod, a metal connector, an elastic band, a hook and a second fixing rod, during use, as the tire is placed on the top of the plastic chassis, cross-place the two groups of elastic bands, and hang the hooks at the ends of the elastic bands on the second fixing rod to fix the tire. The first fixing rod and the metal connector in the belt reservation groove provide physical support for the installation and fixation of the elastic bands, realizing the function of facilitating the binding and fixing of the tire. Description of the Drawings

[0019] Figure 1 Front view structural schematic diagram of the present utility model;

[0020] Figure 2 Bottom view structural schematic diagram of the present utility model;

[0021] Figure 3 For the present utility model Figure 2 Enlarged partial sectional structural schematic diagram at A in;

[0022] Figure 4 Enlarged side view structural schematic diagram of the roller fixing rod of the present utility model;

[0023] Figure 5This is a partial top - view sectional structure diagram of the present utility model.

[0024] In the figure: 1, plastic chassis; 2, bearing seat; 3, roller fixing rod; 4, universal wheel; 5, connecting shaft; 6, square pipe sleeve; 7, square rod; 8, pulling plate; 9, spline head; 10, return spring; 11, spline groove; 12, handle groove; 13, tool placement cavity; 14, box cover; 15, plum blossom wrench; 16, socket wrench; 17, belt reserved groove; 18, first fixing rod; 19, metal connector; 20, elastic band; 21, hook; 22, second fixing rod; 23, armrest mounting seat; 24, pulling armrest; 25, rubber glove. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1: Please refer to Figures 1-5 , a portable tire - changing mobile cart, including a plastic chassis 1. Two groups of bearing seats 2 are respectively fixedly connected to the four corners at the bottom of the plastic chassis 1. A roller fixing rod 3 is movably connected between one sides of the two groups of bearing seats 2. The bottom end of the roller fixing rod 3 is movably connected with a universal wheel 4. Inside the top end of the plastic chassis 1, there is a handle groove 12. Two groups of armrest mounting seats 23 are installed inside the handle groove 12. A pulling armrest 24 is installed at the top end of the armrest mounting seat 23. A rubber glove 25 is sleeved at the top end of the pulling armrest 24. A roller retracting structure is provided on one side of the plastic chassis 1;

[0027] Please refer to Figures 1-5 , a portable tire - changing mobile cart further includes a roller retracting structure. The roller retracting structure includes two groups of square pipe sleeves 6. The two groups of square pipe sleeves 6 are respectively fixedly connected to the front and rear ends on one side of the plastic chassis 1. A square rod 7 is horizontally inserted into the inside of the square pipe sleeve 6. A pulling plate 8 is fixedly connected to one side of the square rod 7. A spline head 9 is fixedly connected to the other side of the square rod 7. A return spring 10 is installed between one side of the spline head 9 and the inner wall of the plastic chassis 1;

[0028] A connecting shaft 5 is horizontally fixedly connected between one sides of two groups of roller fixing rods 3. The roller fixing rods 3 are symmetrically distributed about the vertical center line of the connecting shaft 5. The outer diameter of the square rod 7 is consistent with the inner diameter of the square pipe sleeve 6. The square rod 7 can slide left and right along the inside of the square pipe sleeve 6. A spline groove 11 is arranged inside the other side of the roller fixing rod 3. The shape and size of the outer part of the spline head 9 are consistent with the shape and size of the inside of the spline groove 11, which is convenient for folding and storing the rollers;

[0029] Specifically, as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, turn the plastic chassis 1 over, grasp the pulling plate 8 and pull it outwards. The pulling plate 8 drives the square rod 7 to displace outwards along the square pipe sleeve 6. The spline head 9 on one side of the square pipe sleeve 6 disengages from the spline groove 11 on the side of the roller fixing rod 3. At this time, turn the universal wheel 4 inwards, and the roller fixing rod 3 can rotate inwards along the bearing seat 2. The connecting shaft 5 can connect the front and rear groups of roller fixing rods 3 to make them rotate synchronously. After turning to the in-place position, release the pulling plate 8, and the return spring 10 pushes the spline head 9 to extend forward. The spline head 9 is snapped into the spline groove 11, and the positions of the roller fixing rod 3 and the universal wheel 4 are fixed. The whole trolley is in a plate shape, which can save space.

[0030] Embodiment 2: A tool placement cavity 13 is arranged at the middle position of the top of the plastic chassis 1. One side of the top of the tool placement cavity 13 is movably hinged with a box cover 14. The bottom end of the tool placement cavity 13 is flush with the bottom end of the plastic chassis 1. A socket wrench 15 is horizontally placed at one end inside the tool placement cavity 13, and a socket wrench 16 is horizontally placed at the other end inside the tool placement cavity 13, which is convenient for storing and accommodating tools;

[0031] Specifically, as Figure 1 and Figure 5 shown, put the tools required for changing the tire, such as the socket wrench 15 and the socket wrench 16, into the tool placement cavity 13 one by one, and then close the box cover 14. When changing the tire, it can be directly taken. The removed bolts and nuts can be directly put into the tool placement cavity 13, which can prevent loss and save time and effort.

[0032] Embodiment 3: Belt reserved grooves 17 are respectively arranged at the front and rear ends of the top of the plastic chassis 1. One side inside the belt reserved groove 17 is fixedly connected with a first fixing rod 18, and the other side inside the belt reserved groove 17 is fixedly connected with a second fixing rod 22. The first fixing rod 18 and the second fixing rod 22 have the same size. The tops of the first fixing rod 18 and the second fixing rod 22 are lower than the top of the plastic chassis 1. A metal connecting head 19 is sleeved outside the first fixing rod 18. An elastic band 20 is installed at one end of the metal connecting head 19, and a hook 21 is installed at the end of the elastic band 20, which is convenient for fixing the tire;

[0033] Specifically, as Figure 1 and Figure 5 shown, cross-place two sets of elastic bands 20, and hang the hooks 21 at the ends of the elastic bands 20 on the second fixing rod 22 to fix the tire. The first fixing rod 18 and the metal connector 19 in the belt reserved groove 17 provide physical support for the installation and fixation of the elastic band 20.

[0034] Working principle: When the utility model is in use, first, turn up the pulling armrest 24 from the handle groove 12, tighten the bolts on the side of the armrest mounting seat 23 to fix the position of the pulling armrest 24. Then, place the tire horizontally on the top of the plastic chassis 1 and fix it. After that, hold the pulling armrest 24 and push or pull to transfer the tire. When storing the cart, first press the pulling armrest 24 into the handle groove 12, then turn the plastic chassis 1 over, hold the pulling plate 8 and pull it outwards. The pulling plate 8 drives the square rod 7 to displace outwards along the square pipe sleeve 6. The spline head 9 on one side of the square pipe sleeve 6 disengages from the spline groove 11 on the side of the roller fixing rod 3. At this time, turn the universal wheel 4 inwards, and the roller fixing rod 3 can rotate inwards along the bearing seat 2. The connecting shaft 5 can connect the front and rear groups of roller fixing rods 3 to make them rotate synchronously. After turning to the in-place position, release the pulling plate 8, and the return spring 10 pushes the spline head 9 to extend forward. The spline head 9 is inserted into the spline groove 11, and the position of the roller fixing rod 3 together with the universal wheel 4 is fixed. The whole cart is in a plate shape, which can save space. Before going out on a mission, first open the box cover 14, put tools required for changing the tire, such as a socket wrench 15 and a sleeve wrench 16, into the tool placement cavity 13 one by one, and then close the box cover 14. When changing the tire, they can be directly taken. The removed bolts and nuts can be directly put into the tool placement cavity 13 to prevent loss and save time and effort. As the tire is placed on the top of the plastic chassis 1, cross-place two sets of elastic bands 20, and hang the hooks 21 at the ends of the elastic bands 20 on the second fixing rod 22 to fix the tire. The first fixing rod 18 and the metal connector 19 in the belt reserved groove 17 provide physical support for the installation and fixation of the elastic band 20.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A portable tire changing cart, comprising a plastic chassis (1), characterized in that: Two groups of bearing seats (2) are fixedly connected at the four corners of the bottom of the plastic chassis (1), and a roller fixing rod (3) is movably connected between one side of the two groups of bearing seats (2). The bottom end of the roller fixing rod (3) is movably connected to a universal wheel (4). A handle groove (12) is provided inside the top of the plastic chassis (1), and two groups of handrail mounting seats (23) are installed inside the handle groove (12). A traction handrail (24) is installed at the top of the handrail mounting seat (23). The top of the handrail (24) is sleeved with a rubber glove (25); a tool placement cavity (13) is provided at the middle position of the top of the plastic chassis (1); belt reserved grooves (17) are provided at the front and rear ends of the top of the plastic chassis (1); a first fixed rod (18) is fixedly connected to one side of the belt reserved groove (17); a second fixed rod (22) is fixedly connected to the other side of the belt reserved groove (17); and a roller structure for folding is provided on one side of the plastic chassis (1); The roller structure for folding easily comprises two groups of square tube sleeves (6), the two groups of square tube sleeves (6) are respectively fixedly connected to the front and rear ends of one side of the plastic chassis (1), a square rod (7) is transversely inserted into the interior of the square tube sleeve (6), one side of the square rod (7) is fixedly connected to a pulling plate (8), the other side of the square rod (7) is fixedly connected to a spline head (9), and a return spring (10) is installed between one side of the spline head (9) and the inner wall of the plastic chassis (1).

2. A portable tire changing cart according to claim 1, characterized in that: A connecting shaft (5) is transversely fixedly connected between one side of the two groups of roller fixing rods (3), and the roller fixing rods (3) are symmetrically distributed about the vertical center line of the connecting shaft (5).

3. A portable tire changing cart according to claim 1, characterized in that: The outer diameter of the square rod (7) is consistent with the inner diameter of the square tube sleeve (6), and the square rod (7) can slide left and right along the inside of the square tube sleeve (6).

4. The portable tire changing cart according to claim 1, characterized in that: A spline groove (11) is provided inside the other side of the roller fixing rod (3), and the shape and size of the outside of the spline head (9) are consistent with the shape and size of the inside of the spline groove (11).

5. The portable tire changing cart according to claim 1, characterized in that: A box cover (14) is movably hinged on one side of the top of the tool placement cavity (13), and the bottom end of the tool placement cavity (13) is flush with the bottom end of the plastic chassis (1).

6. A portable tire changing cart according to claim 1, characterized in that: A box spanner (15) is horizontally placed at one end of the tool placement cavity (13), and a socket spanner (16) is horizontally placed at the other end of the tool placement cavity (13).

7. The portable tire changing cart according to claim 1, characterized in that: The first fixing rod (18) and the second fixing rod (22) have the same size, and the top ends of the first fixing rod (18) and the second fixing rod (22) are lower than the top end of the plastic chassis (1).

8. The portable tire changing cart according to claim 1, characterized in that: The first fixing rod (18) is sleeved with a metal connector (19) on its exterior, an elastic band (20) is installed at one end of the metal connector (19), and a hook (21) is installed at the end of the elastic band (20).

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