Front and rear wheel dismounting structure of trolley

Abstract

The utility model discloses a front and rear wheel disassembling and assembling structure of a small handcart, and aims to solve the problems that the occupied area is large and the transportation cost is high during carrying due to the fact that the conventional wheels cannot be disassembled. According to the technical scheme, the trolley is characterized by comprising a trolley frame, four vertical rods are fixedly connected to the lower end face of the trolley frame, wheel assemblies are arranged on the vertical rods and comprise mounting frames and wheels rotationally connected with the mounting frames, and fixing blocks are fixedly connected to the sides, close to the vertical rods, of the mounting frames; a containing groove is formed in the upper end face of the fixing block, a connecting piece is arranged on the vertical rod, and the vertical rod and the containing groove are detachably connected through the connecting piece. According to the trolley, the wheels can be conveniently disassembled and assembled, the size of the trolley in the transportation process is reduced, and the transportation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of disassembly of trolley wheels, and more specifically, to a front and rear wheel disassembly and assembly structure of a trolley. Background Art

[0002] A trolley is a handling vehicle that is pushed or pulled by manpower. Although the material handling technology of trolleys has been continuously developed, trolleys are still used as indispensable handling tools to this day.

[0003] If the wheels can be disassembled during the transportation of the trolley, the volume of the trolley can be reduced, the transportation cost can be saved, and the storage of the trolley can be facilitated. However, in the prior art, the disassembly and installation operations of the wheels are relatively complicated. Not only tools (such as hammers, pliers or screwdrivers, etc.) are required, but also other auxiliary parts need to be disassembled and installed, such as fixing pins, bolts, nuts or axles. And some of the auxiliary parts are small and easy to be lost, resulting in the inability to install the wheels after disassembly.

[0004] Therefore, a solution needs to be proposed to solve this problem. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a front and rear wheel disassembly and assembly structure of a trolley, which can facilitate the disassembly and assembly of the wheels, reduce the volume of the trolley during transportation, and reduce the transportation cost.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: A front and rear wheel disassembly and assembly structure of a trolley, including a frame, four vertical rods are fixedly connected to the lower end surface of the frame, a wheel assembly is arranged on the vertical rods, the wheel assembly includes an installation frame and a wheel rotatably connected to the installation frame, a fixing block is fixedly connected to one side of the installation frame close to the vertical rod, a receiving groove is opened on the upper end surface of the fixing block, a connecting piece is arranged on the vertical rod, and the vertical rod and the receiving groove are detachably connected through the connecting piece.

[0007] The utility model is further arranged as follows: The connecting piece includes a cavity one arranged in the vertical rod and a convex shaft fixedly connected to the inner wall of the cavity one. An arc-shaped elastic part is sleeved on the convex shaft. Two ends of the arc-shaped elastic part are respectively fixedly connected with elastic pieces. One ends of the two elastic pieces far away from the arc-shaped elastic part are both fixedly connected with a first clamping block. A through groove for the first clamping block to extend out is arranged on the side wall of the vertical rod, and a first clamping groove for the first clamping block to be clamped into is arranged on the inner wall of the receiving groove.

[0008] The present utility model is further configured as follows: The connecting member includes a convex block for inserting into the receiving groove. The convex block is fixedly connected to the lower end surface of the vertical rod. Cavity two that communicates with each other is provided inside both the convex block and the vertical rod. Two symmetrically distributed driving rods are slidably connected inside cavity two. An elastic member is provided between the two driving rods on both sides. Pressing rods are fixedly connected to one ends of the two driving rods on both sides close to the vertical rod. A through hole one for the pressing rod to extend out is provided on the vertical rod. The other end of the driving rod is fixedly connected to a second clamping block. A through hole two for the second clamping block to extend out is provided on the convex block. A second clamping groove for the second clamping block to be clamped into is provided on the inner wall of the receiving groove.

[0009] The present utility model is further configured as follows: A plurality of recessed segments distributed in an array are provided on the outer wall of the pressing rod.

[0010] The present utility model is further configured as follows: The elastic member is a return spring.

[0011] The present utility model is further configured as follows: Both the arc-shaped elastic portion and the elastic sheet are elastic metal sheets.

[0012] In summary, the present utility model has the following beneficial effects:

[0013] The present utility model can disassemble and assemble the wheels, reduces the volume of the trolley during transportation, and reduces the transportation cost. At the same time, external tools are not required during the disassembly and assembly process, making the disassembly and assembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model Figure 1 , showing the structural characteristics when the vertical rod and the fixed block are connected together in Embodiment 1;

[0015] Figure 2 is a schematic structural diagram of Embodiment 1 of the present utility model Figure 2 , showing the structural characteristics when the vertical rod and the fixed block are separated in Embodiment 1;

[0016] Figure 3 is a schematic structural diagram of Embodiment 2 of the present utility model Figure 1 , showing the structural characteristics when the vertical rod and the fixed block are connected in Embodiment 2;

[0017] Figure 4 is a schematic structural diagram of Embodiment 2 of the present utility model Figure 2 , showing the structural characteristics when the vertical rod and the fixed block are separated in Embodiment 2;.

[0018] In the figure: 1, frame; 2, vertical rod; 3, mounting bracket; 4, wheel; 5, fixing block; 6, receiving groove; 7, first cavity; 8, convex shaft; 9, arc-shaped elastic part; 10, elastic sheet; 11, first clamping block; 12, first clamping groove; 13, convex block; 14, second cavity; 15, driving rod; 16, elastic member; 17, pressing rod; 18, second clamping block; 19, second clamping groove. Detailed implementation mode

[0019] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "provided with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0022] The present utility model will be described in detail below with reference to the accompanying drawings.

[0023] Embodiment 1: A front and rear wheel disassembly and assembly structure of a trolley, as Figure 1 - Figure 2 shown, includes a frame 1. Four vertical rods 2 are fixedly connected to the lower end surface of the frame 1. A wheel assembly is arranged on the vertical rods 2. The wheel assembly includes a mounting bracket 3 and a wheel 4 rotatably connected to the mounting bracket 3. A fixing block 5 is fixedly connected to one side of the mounting bracket 3 close to the vertical rod 2. A receiving groove 6 is opened on the upper end surface of the fixing block 5. A connecting member is arranged on the vertical rod 2, and the vertical rod 2 and the receiving groove 6 are detachably connected through the connecting member.

[0024] The connecting piece includes a first cavity 7 arranged in the vertical rod 2 and a convex shaft 8 fixedly connected to the inner wall of the first cavity 7. An arc-shaped elastic part 9 is sleeved on the convex shaft 8. Both ends of the arc-shaped elastic part 9 are fixedly connected with elastic pieces 10. One end of each of the two elastic pieces 10 far away from the arc-shaped elastic part 9 is fixedly connected with a first clamping block 11. A through groove for the first clamping block 11 to extend out is arranged on the side wall of the vertical rod 2, and a first clamping groove 12 for the first clamping block 11 to be clamped into is arranged on the inner wall of the receiving groove 6. Both the arc-shaped elastic part 9 and the elastic pieces 10 are elastic metal sheets.

[0025] Working principle: When the wheel 4 is installed on the vehicle frame 1 and connected to the vertical rod 2, the end of the vertical rod 2 far away from the vehicle frame 1 will be inserted into the receiving groove 6. The arc-shaped elastic part 9 is in an initial state. The two first clamping blocks 11 on both sides will extend out from the through groove and be clamped into the first clamping groove 12 and extend out to the outside. When it is necessary to remove the wheel 4 from the vertical rod 2, press the two first clamping blocks 11 on both sides at the same time to drive the two elastic pieces 10 to gather towards each other. At this time, the arc-shaped elastic part 9 will deform, so that the first clamping block 11 is withdrawn from the first clamping groove 12, and then the mounting bracket 3 and the fixing block 5 are pulled out downward, so that the vertical rod 2 is pulled out from the receiving groove 6. During this process, the first clamping block 11 will be squeezed by the inner wall of the receiving groove 6 and contracted in the through groove. After the vertical rod 2 is pulled out from the receiving groove 6, the mounting bracket 3 and the wheel 4 can be separated from the vehicle frame 1, and the vehicle frame 1 and the wheel 4 can be packaged and transported separately, reducing the volume during the cart transportation process and making the transportation cost of the cart lower;

[0026] At the same time, when it is necessary to reinstall the wheel 4 on the vehicle frame 1, first press the two first clamping blocks 11 on both sides to retract them into the through groove, and then insert the vertical rod 2 into the receiving groove 6. When the through groove moves to the position corresponding to the first clamping groove 12, the first clamping block 11 can pop out from the through groove through the elastic restoring force of the arc-shaped elastic sheet and be clamped into the first clamping groove 12 to realize the installation of the wheel 4. The whole process of disassembly and assembly does not require external tools, and the disassembly and assembly are convenient.

[0027] Embodiment 2: Compared with Embodiment 1, the difference in Embodiment 2 is that the structure of the connecting piece is different. As Figure 3 - Figure 4 shown, in Embodiment 2: The connecting piece includes a convex block 13 for inserting into the receiving groove 6. The convex block 13 is fixedly connected to the lower end surface of the vertical rod 2. Both the convex block 13 and the vertical rod 2 are internally provided with a second cavity 14 that is mutually communicated. Two symmetrically distributed driving rods 15 are slidably connected in the second cavity 14. An elastic member 16 is arranged between the two driving rods 15 on both sides. The elastic member 16 is a return spring, and both ends of the elastic member 16 are fixedly connected to the two driving rods 15 on both sides.

[0028] One end of the two driving rods 15 close to the vertical rod 2 is fixedly connected with a pressing rod 17. A number of recessed segments are arranged in an array on the outer wall of the pressing rod 17, and anti-slip patterns are formed by the arrangement of the recessed segments. A through hole one for the pressing rod 17 to extend out is formed on the vertical rod 2. The other end of the driving rod 15 is fixedly connected with a second clamping block 18. A through hole two for the second clamping block 18 to extend out is formed on the convex block 13. A second clamping groove 19 for the second clamping block 18 to be inserted into is arranged on the inner wall of the accommodating groove 6.

[0029] When the vertical rod 2 is connected to the fixed block 5, the convex block 13 will be inserted into the accommodating groove 6, the elastic member 16 is in an initial state, and the two second clamping blocks 18 on both sides will extend out of the through hole two and be inserted into the second clamping groove 19. When it is necessary to disassemble the wheel 4 from the vertical rod 2, press the pressing rods 17 on both sides simultaneously to make the two driving rods 15 approach each other. The elastic member 16 will contract, and the two second clamping blocks 18 will be driven by the driving rods 15 to retract into the through hole two, and then the convex block 13 can be smoothly withdrawn from the accommodating groove 6 to disassemble the wheel 4.

[0030] Similarly, when it is necessary to reinstall the wheel 4, insert the convex block 13 back into the accommodating groove 6, and then release the pressing rods 17 on both sides. The elastic force of the elastic member 16 drives the two driving rods 15 on both sides to return to their original positions, so that the second clamping blocks 18 extend out of the through hole two again and are inserted into the second clamping groove 19 to realize the installation of the wheel 4. The operation is convenient and the connection is more stable.

[0031] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A front and rear wheel disassembly and assembly structure of a trolley, comprising a frame (1), characterized in that: The lower end surface of the frame (1) is fixedly connected with four vertical rods (2). A wheel assembly is arranged on the vertical rods (2). The wheel assembly includes a mounting bracket (3) and a wheel (4) rotatably connected to the mounting bracket (3). One side of the mounting bracket (3) close to the vertical rod (2) is fixedly connected with a fixing block (5). A receiving groove (6) is formed on the upper end surface of the fixing block (5). A connecting piece is arranged on the vertical rod (2). The vertical rod (2) and the receiving groove (6) are detachably connected through the connecting piece.

2. The front and rear wheel disassembly and assembly structure of a trolley according to claim 1, characterized in that: The connecting piece includes a cavity one (7) arranged in the vertical rod (2) and a convex shaft (8) fixedly connected to the inner wall of the cavity one (7). An arc-shaped elastic part (9) is sleeved on the convex shaft (8). Both ends of the arc-shaped elastic part (9) are respectively fixedly connected with elastic pieces (10). One end of each of the two elastic pieces (10) far from the arc-shaped elastic part (9) is fixedly connected with a first clamping block (11). A through groove for the first clamping block (11) to extend out is arranged on the side wall of the vertical rod (2). A first clamping groove (12) for the first clamping block (11) to be clamped into is arranged on the inner wall of the receiving groove (6).

3. The front and rear wheel disassembly and assembly structure of a trolley according to claim 1, characterized in that: The connecting piece includes a convex block (13) for inserting into the receiving groove (6). The convex block (13) is fixedly connected to the lower end surface of the vertical rod (2). A cavity two (14) that is mutually communicated is arranged inside both the convex block (13) and the vertical rod (2). Two symmetrically distributed driving rods (15) are slidably connected in the cavity two (14). An elastic member (16) is arranged between the two driving rods (15). One end of each of the two driving rods (15) close to the vertical rod (2) is fixedly connected with a pressing rod (17). A through hole one for the pressing rod (17) to extend out is formed on the vertical rod (2). The other end of the driving rod (15) is fixedly connected with a second clamping block (18). A through hole two for the second clamping block (18) to extend out is arranged on the convex block (13). A second clamping groove (19) for the second clamping block (18) to be clamped into is arranged on the inner wall of the receiving groove (6).

4. The front and rear wheel disassembly and assembly structure of a trolley according to claim 3, characterized in that: A number of recessed segments distributed in an array are arranged on the outer wall of the pressing rod (17).

5. The front and rear wheel disassembly and assembly structure of a trolley according to claim 3, characterized in that: The elastic member (16) is a return spring.

6. The front and rear wheel disassembly and assembly structure of a trolley according to claim 2, characterized in that: Both the arc-shaped elastic part (9) and the elastic piece (10) are elastic metal sheets.

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