Fixed wheel structure of a trolley

Abstract

The present invention provides a fixed wheel structure of a trolley. First, a trolley body is provided, which includes a load-bearing plate, fixed casters, universal casters and handrails. The fixed casters and universal casters are respectively installed at opposite ends of the length direction of the load-bearing plate, and both the fixed casters and universal casters are located on the lower surface of the load-bearing plate. The handrails are installed on the upper surface of the load-bearing plate. Each fixed caster is provided with four first mounting holes, and each universal caster is provided with four second mounting holes. The size of the second mounting holes is equal to the size of the first mounting holes. The positioning casters include a mounting seat and a roller. The mounting seat includes a bottom plate and two side plates. The bottom plate is fixedly installed on the lower surface of the load-bearing plate by screws. The two side plates are respectively arranged at opposite ends of the bottom plate and the roller is rotatably connected between the two side plates. Two symmetrical bending parts are provided on the side plates. Compared with the prior art, the present invention improves the installation strength of the positioning casters and reduces the probability of deformation of the positioning casters during use.

Description

Technical Field

[0001] The invention relates to a wheelbarrow, and in particular to a fixed wheel structure of the wheelbarrow. Background Art

[0002] A trolley is a transport vehicle that is pushed and pulled by manpower. Although the material handling technology of trolleys is constantly developing, trolleys are still used as an indispensable transport tool. The bottom of a trolley is generally equipped with both fixed casters and swivel casters. During the turning process, fixed casters are subject to large torque due to the limitation of orientation. This torque is mainly borne by screws. Long-term operation will cause the screws to loosen or even the mounting seat of the fixed casters to deform, thus affecting the use of the trolley. Summary of the invention

[0003] In view of this, the present invention provides a fixed wheel structure for a trolley, which improves the installation strength of the positioning casters and reduces the probability of deformation of the positioning casters during use compared to the prior art.

[0004] To this end, the present invention provides a fixed wheel structure of a trolley. First, a trolley body is set, which includes a load-bearing plate, fixed casters, universal casters and armrests. The fixed casters and universal casters are respectively installed at opposite ends of the length direction of the load-bearing plate, and the fixed casters and universal casters are both located on the lower surface of the load-bearing plate. The armrests are installed on the upper surface of the load-bearing plate and the positions of the armrests correspond to the positions of the universal casters. Each fixed caster is provided with four first mounting holes, and each universal caster is provided with four second mounting holes. The size of the second mounting holes is equal to the size of the first mounting holes. The positioning casters include a mounting seat and rollers. The mounting seat includes a bottom plate and two side plates. The bottom plate is fixedly installed on the lower surface of the load-bearing plate by screws. The two side plates are respectively arranged at opposite ends of the bottom plate and the rollers are rotatably connected between the two side plates. Two symmetrical bending portions are opened on the side plates.

[0005] Furthermore, the bent portion is bent toward between the two side plates.

[0006] Furthermore, the bent portion is in an arc shape.

[0007] Furthermore, a torsion balancing mechanism is installed on the bottom plate, and two opposite ends of the torsion balancing mechanism are respectively abutted against two adjacent screws.

[0008] Furthermore, the torsion balancing mechanism includes a clamping block, an elastic component and an abutment block. The bottom of the clamping block is fixedly mounted on the load-bearing plate, and the side end surface of the clamping block is clamped on the bottom plate. An abutment block is connected to each of the opposite ends of the clamping block, and an elastic component is arranged between the abutment block and the clamping block, and the abutment block abuts on the screw.

[0009] Furthermore, a connecting block is fixedly mounted on the abutting block, and at least two elastic components are connected between the connecting block and the clamping block.

[0010] Furthermore, the elastic component includes two sleeves and a spring. The two sleeves are fixedly installed on the connecting block and the clamping block respectively, and the opposite ends of the spring are fixedly installed in the two sleeves respectively.

[0011] Furthermore, the abutment block is a C-shaped structure.

[0012] The fixed wheel structure of a trolley provided by the present invention mainly comprises a trolley body and a torsion balancing mechanism, the trolley body comprises a load-bearing plate, fixed casters, universal casters and handrails, the fixed casters comprise a mounting seat and a roller, the mounting seat comprises a bottom plate and two side plates, the bottom plate is fixedly mounted on the lower surface of the load-bearing plate by screws, the two side plates are respectively arranged at opposite ends of the bottom plate and the roller is rotatably connected between the two side plates, two symmetrical bending parts are provided on the side plates, the function of the bending parts is to improve the structural strength of the mounting seat itself and avoid deformation, and the torsion balancing mechanism is used to reduce the torsion The influence of force on the screw, that is, to solve the problem of loose deformation of the mounting seat from the installation and connection structure of the mounting seat. Specifically, the torque balancing mechanism includes a clamping block, an elastic component and an abutting block. The bottom of the clamping block is fixedly mounted on the load-bearing plate, and the side end surface of the clamping block is clamped on the bottom plate to improve the connection strength between the bottom plate and the load-bearing plate. An abutting block is connected to each of the opposite ends of the clamping block, and an elastic component is arranged between the abutting block and the clamping block. The abutting block abuts on the screw. Under the elastic action of the elastic component, the abutting block can weaken the torque brought to the screw by the steering of the trolley, thereby improving the fastening life of the screw.

[0013] Therefore, compared with the prior art, the present invention improves the installation strength of the positioning caster and reduces the probability of deformation of the positioning caster during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0015] Figure 1 A schematic structural diagram of a fixed wheel structure of a trolley provided by an embodiment of the present invention in which a torsion balancing mechanism is not installed;

[0016] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0017] Figure 3 A schematic structural diagram of a directional caster having a torque balancing mechanism installed in a fixed wheel structure of a trolley provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0019] Embodiment 1:

[0020] See also Figures 1 to 3 The present embodiment provides a fixed wheel structure of a trolley. First, a trolley body 1 is provided, which includes a load-bearing plate 11, fixed casters 12, swivel casters 13 and handrails 14. The fixed casters 12 and swivel casters 13 are respectively installed at opposite ends of the length direction of the load-bearing plate 11, and the fixed casters 12 and swivel casters 13 are both located on the lower surface of the load-bearing plate 11. The handrails 14 are installed on the upper surface of the load-bearing plate 11 and the position of the handrails 14 corresponds to the position of the swivel casters 13. Each fixed caster 12 is provided with four A mounting hole, each universal caster 13 is provided with four second mounting holes, the size of the second mounting hole is equal to the size of the first mounting hole (hole diameter and hole depth), the positioning caster 12 includes a mounting seat 2 and a roller 121, the mounting seat 2 includes a base plate 21 and two side plates 22, the base plate 21 is fixedly mounted on the lower surface of the load-bearing plate 11 by screws 3, the two side plates 22 are respectively arranged at opposite ends of the base plate 21 and the roller 121 is rotatably connected between the two side plates 22, and two symmetrical bending portions 221 are opened on the side plate 22.

[0021] Continue to see Figures 1 to 3 The bending portion 221 is bent toward between the two side plates 22, and the bending portion 221 is in an arc shape. A torsion balancing mechanism 4 is installed on the bottom plate 21, and the opposite ends of the torsion balancing mechanism 4 are respectively abutted on two adjacent screws 3. The torsion balancing mechanism 4 includes a clamping block 41, an elastic component 42 and an abutting block 43. The bottom of the clamping block 41 is fixedly installed on the load-bearing plate 11, and the side end surface of the clamping block 41 is clamped on the bottom plate 21. The opposite ends of the clamping block 41 are each connected with an abutting block 43 and the abutting block 43 An elastic component 42 is arranged between the abutting block 43 and the clamping block 41, the abutting block 43 abuts on the screw 3, a connecting block 431 is fixedly installed on the abutting block 43, at least two elastic components 42 are connected between the connecting block 431 and the clamping block 41, the elastic component 42 includes two sleeves 421 and a spring 422, the two sleeves 421 are respectively fixedly installed on the connecting block 431 and the clamping block 41, the opposite ends of the spring 422 are respectively fixedly installed in the two sleeves 421, and the abutting block 43 is a C-shaped structure.

[0022] The fixed wheel structure of a trolley provided by the present invention mainly comprises a trolley body and a torsion balancing mechanism, the trolley body comprises a load-bearing plate, fixed casters, universal casters and handrails, the fixed casters comprise a mounting seat and a roller, the mounting seat comprises a bottom plate and two side plates, the bottom plate is fixedly mounted on the lower surface of the load-bearing plate by screws, the two side plates are respectively arranged at opposite ends of the bottom plate and the roller is rotatably connected between the two side plates, two symmetrical bending parts are provided on the side plates, the function of the bending parts is to improve the structural strength of the mounting seat itself and avoid deformation, and the torsion balancing mechanism is used to reduce the torsion The influence of force on the screw, that is, to solve the problem of loose deformation of the mounting seat from the installation and connection structure of the mounting seat. Specifically, the torque balancing mechanism includes a clamping block, an elastic component and an abutting block. The bottom of the clamping block is fixedly mounted on the load-bearing plate, and the side end surface of the clamping block is clamped on the bottom plate to improve the connection strength between the bottom plate and the load-bearing plate. An abutting block is connected to each of the opposite ends of the clamping block, and an elastic component is arranged between the abutting block and the clamping block. The abutting block abuts on the screw. Under the elastic action of the elastic component, the abutting block can weaken the torque brought to the screw by the steering of the trolley, thereby improving the fastening life of the screw.

[0023] Therefore, compared with the prior art, the present invention improves the installation strength of the positioning caster and reduces the probability of deformation of the positioning caster during use.

[0024] Embodiment 2:

[0025] See also Figures 1 to 3 The figure shows a fixed wheel structure of a trolley provided in Example 2 of the present invention. This embodiment further makes the following improved technical solutions on the basis of the above embodiments: only one torque balancing mechanism 4 is installed on the positioning caster 12 in Example 1, but the positioning caster 12 has four screws, and the torque balancing mechanism 4 also needs to be installed at the other two screws, thereby improving the fastening life of the four screws.

[0026] Embodiment three:

[0027] See also Figures 1 to 3 , the figure shows a fixed wheel structure of a trolley provided by embodiment 3 of the present invention. On the basis of the above embodiments, this embodiment further makes the following improved technical solutions: the torsion balancing mechanism 4 includes a clamping block 41, an elastic component 42 and an abutting block 43. The bottom of the clamping block 41 is fixedly installed on the load-bearing plate 11, and the side end surface of the clamping block 41 is clamped on the bottom plate 21. An abutting block 43 is connected to each of the opposite ends of the clamping block 41, and an elastic component 42 is arranged between the abutting block 43 and the clamping block 41. The abutting block 43 abuts on the screw 3, and an anti-slip corrugated surface is provided on the abutting surface of the abutting block 43. At the same time, an anti-slip rubber sheet can be added to play an auxiliary anti-slip effect, effectively preventing the abutting block 43 from detaching from the screw 3.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A fixed wheel structure of a trolley, which is arranged on a trolley body (1), the trolley body (1) comprising a load-bearing plate (11), fixed casters (12), universal casters (13) and handrails (14), the fixed casters (12) and the universal casters (13) being respectively mounted on opposite ends of the length direction of the load-bearing plate (11), and the fixed casters (12) and the universal casters (13) being both located on the lower surface of the load-bearing plate (11), the handrails (14) being mounted on the upper surface of the load-bearing plate (11) and the position of the handrails (14) corresponding to the position of the universal casters (13), characterized in that: Each of the fixed casters (12) is provided with four first mounting holes, and each of the universal casters (13) is provided with four second mounting holes, the size of the second mounting holes being equal to the size of the first mounting holes. The fixed casters (12) include a mounting seat (2) and a roller (121), the mounting seat (2) includes a bottom plate (21) and two side plates (22), the bottom plate (21) is fixedly mounted on the lower surface of the bearing plate (11) by screws (3), and the two side plates (22) are respectively provided on The opposite ends of the bottom plate (21) and the roller (121) are rotatably connected between the two side plates (22). The side plates (22) are provided with two symmetrical bending portions (221). The bending portions (221) are bent toward between the two side plates (22). The bending portions (221) are arc-shaped. A torsion balancing mechanism (4) is installed on the bottom plate (21). The opposite ends of the torsion balancing mechanism (4) are respectively in contact with the two adjacent screws (3). The torsion balancing mechanism (4) ) comprises a clamping block (41), an elastic component (42) and an abutting block (43), the bottom of the clamping block (41) is fixedly mounted on the load-bearing plate (11), and the side end surface of the clamping block (41) is clamped on the bottom plate (21), and the opposite ends of the clamping block (41) are each connected to an abutting block (43), and the elastic component (42) is provided between the abutting block (43) and the clamping block (41), the abutting block (43) abuts on the screw (3), and the abutting block (43) is A connecting block (431) is fixedly installed, at least two elastic components (42) are connected between the connecting block (431) and the clamping block (41), the elastic component (42) comprises two sleeves (421) and a spring (422), the two sleeves (421) are fixedly installed on the connecting block (431) and the clamping block (41), respectively, the opposite ends of the spring (422) are fixedly installed in the two sleeves (421), and the abutting block (43) is a C-shaped structure.

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