Trundle assembly and flat car

Abstract

The trundle assembly comprises a wheel carrier, the wheel carrier comprises a wheel carrier body and a foot brake installation part arranged on the rear side of the wheel carrier body, and the rear side face of the foot brake installation part is provided with a guiding arc-shaped face and a limiting vertical face from bottom to top; the trundles are rotationally mounted on the wheel carriers; the foot brake comprises a foot brake plate and an elastic foot brake structure which are mounted on the wheel carrier, the foot brake plate is rotationally connected with the foot brake mounting part through a rotating shaft, the foot brake can rotate between a brake position and a brake release position relative to the foot brake mounting part, the circle center of the guide arc-shaped surface is located on the axis of the rotating shaft, and a limiting part is arranged on the foot brake; when the foot brake rotates to the brake position from the brake releasing position, the front side face of the limiting part rotates to the guide arc-shaped face along the limiting vertical face, the elastic foot brake structure locks the caster, and when the foot brake rotates to the brake releasing position from the brake position, the front side face of the limiting part rotates to the limiting vertical face along the guide arc-shaped face, and the elastic foot brake structure locks the caster. And the elastic foot brake structure resets and tightly presses the limiting part on the limiting vertical surface.

Description

Technical Field

[0001] This utility model relates to the field of freight trolley technology, and in particular to a caster assembly and a flatbed trolley. Background Technology

[0002] Please refer to Figure 1 Existing flatbed truck caster assemblies typically include a foot brake 2' for braking the caster 3'. The wheel frame body 11' of the wheel frame 1' has a foot brake mounting part 13', on which the foot brake 2' is mounted. The wheel frame body 11' has a mounting flange 12', which is fixed to the bottom side of the flatbed truck's cargo platform with screws. When the foot brake 2' is unlocked, a limit block A is typically provided on the foot brake 2' to limit its movement. The screw rests on the upper side of the wheel frame body 11, protruding beyond the upper side of the wheel frame body 11'. This causes the gap between the mounting flange 12' and the upper side of the wheel frame body 11' to be encroached upon. The screw cannot easily pass through this gap and through the mounting flange 12' to fix the mounting flange 12' to the cargo plate. Furthermore, when the wheel frame body 11' rotates relative to the cargo plate, the screw will also interfere with the limiting block A of the foot brake 2', producing abnormal noise or even causing the foot brake 2' to fail to rotate.

[0003] Therefore, there is an urgent need for a caster assembly to solve the above problems. Utility Model Content

[0004] This utility model aims to solve, at least to some extent, one of the problems existing in the prior art. To this end, this utility model proposes a caster assembly with a foot brake mounted on the wheel frame. On the one hand, it can limit the movement of the foot brake, and on the other hand, the foot brake will not encroach on the space above the wheel frame body. This facilitates the installation of the caster assembly on the bottom side of the cargo plate of the flatbed, which is beneficial to the miniaturization of the flatbed.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A caster assembly, comprising:

[0007] The wheel frame includes a wheel frame body and a foot brake mounting part disposed on the rear side of the wheel frame body. The rear side of the foot brake mounting part is provided with a guide arc surface and a limiting vertical surface from bottom to top.

[0008] Casters are rotatably mounted on the wheel frame;

[0009] The foot brake includes a foot brake plate mounted on the wheel frame and an elastic foot brake structure. The foot brake plate is rotatably connected to the foot brake mounting part via a rotating shaft. The foot brake can rotate relative to the foot brake mounting part between a braking position and a releasing position. The center of the guide arc surface is located on the axis of the rotating shaft. The foot brake is provided with a limiting part. When the foot brake rotates from the releasing position to the braking position, the front side of the limiting part rotates along the limiting vertical surface to the guide arc surface, and the elastic foot brake structure locks the caster. When the foot brake rotates from the braking position to the releasing position, the front side of the limiting part rotates along the guide arc surface to the limiting vertical surface, and the elastic foot brake structure resets and presses the limiting part against the limiting vertical surface.

[0010] Optionally, two foot brake mounting parts are provided, which are spaced apart and arranged opposite to each other, forming a mounting groove between the two foot brake mounting parts. The foot brake plate includes a mounting part and a foot pedal part that are connected to each other. The mounting part is located in the mounting groove on the front side of the foot pedal part and is mounted on the foot brake mounting part through the pivot. The limiting part is provided on both the left and right sides of the mounting part.

[0011] Optionally, the front side of the mounting part is provided with a limiting front side. When the foot brake is in the released position, the limiting front side abuts against the rear side of the upper side plate of the wheel frame body, and the upper side of the mounting part is flush with the upper side of the wheel frame body. Alternatively, the upper side of the mounting part is set lower than the upper side of the wheel frame body.

[0012] Optionally, the upper side of the footrest is provided with multiple anti-slip protrusions.

[0013] Optionally, the mounting part has a first shaft hole, and the foot brake mounting part has a second shaft hole corresponding to the first shaft hole, and the rotating shaft passes through the second shaft hole and the first shaft hole.

[0014] Optionally, the wheel frame further includes a connecting portion disposed on the upper side of the wheel frame body, the connecting portion being provided with a mounting flange, and the bottom side of the mounting flange having an installation clearance gap with the upper side of the wheel frame body.

[0015] Another aspect of this utility model provides a flatbed vehicle, including a cargo platform and the aforementioned caster assembly, wherein the caster assembly is disposed on the underside of the cargo platform.

[0016] Optionally, multiple caster assemblies are provided, and the multiple caster assemblies are evenly distributed on the bottom side of the cargo platform.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] This utility model provides a caster assembly, including a wheel frame, a caster, and a foot brake. The wheel frame includes a wheel frame body and a foot brake mounting part disposed on the rear side of the wheel frame body. The rear side of the foot brake mounting part is provided with a guide arc surface and a limiting vertical surface from bottom to top. The caster is rotatably mounted on the wheel frame. The foot brake includes a foot brake plate mounted on the wheel frame and an elastic foot brake structure. The foot brake plate is rotatably connected to the foot brake mounting part through a rotating shaft. The foot brake can rotate relative to the foot brake mounting part between a braking position and a releasing position. The center of the guide arc surface is located on the axis of the rotating shaft. The foot brake is provided with a limiting part. When the foot brake rotates from the releasing position to the braking position, the front side of the limiting part rotates along the limiting vertical surface to the guide arc surface, and the elastic foot brake structure locks the caster. When the foot brake rotates from the braking position to the releasing position, the front side of the limiting part rotates along the guide arc surface to the limiting vertical surface, and the elastic foot brake structure locks the caster. The mechanism resets and presses the limiting part against the limiting vertical surface. By setting the limiting vertical surface to limit the limiting part, the foot brake will not exceed the releasing position when rotating from the braking position to the releasing position, thereby limiting the foot brake and ensuring its stability. Compared with the existing technology that sets a limiting protrusion on the upper side of the foot brake plate and places the limiting protrusion on the upper side of the upper side plate of the wheel frame body, this method can ensure the limiting effect and will not encroach on the space above the wheel frame body. This is conducive to installing the caster assembly on the bottom side of the cargo plate of the flatbed truck and facilitates the miniaturization of the flatbed truck. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a caster assembly in the prior art;

[0020] Figure 2 This is a three-dimensional structural diagram of the caster assembly provided in a specific embodiment of the present utility model (with the foot brake in the released position);

[0021] Figure 3 yes Figure 2 Exploded view;

[0022] Figure 4 yes Figure 2 The left view;

[0023] Figure 5 This is a three-dimensional structural diagram of the caster assembly provided in a specific embodiment of the present utility model (with the foot brake in the braking position).

[0024] In the picture;

[0025] 1. Wheel frame; 11. Wheel frame body; 12. Mounting flange; 13. Foot brake mounting part; 131. Guide arc surface; 132. Limiting vertical surface; 130. Second shaft hole; 14. Connecting part;

[0026] 2. Foot brake; 21. Foot brake plate; 211. Foot pedal; 2111. Anti-slip protrusion; 212. Mounting part; 2121. Limiting part; 2122. Limiting front side; 2120. First shaft hole; 22. Elastic foot brake structure;

[0027] 3. Casters;

[0028] 100, mounting slot; 200, mounting clearance. Detailed Implementation

[0029] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0030] Please refer to Figures 2-5 This utility model provides a caster assembly 3, including a wheel frame 1, a caster 3, and a foot brake 2. The wheel frame 1 includes a wheel frame body 11 and a foot brake mounting part 13 disposed on the rear side of the wheel frame body 11. The rear side of the foot brake mounting part 13 is provided with a guide arc surface 131 and a limiting vertical surface 132 from bottom to top. The caster 3 is rotatably mounted on the wheel frame 1. The foot brake 2 includes a foot brake plate 21 mounted on the wheel frame 1 and an elastic foot brake structure 22. The foot brake plate 21 is rotatably connected to the foot brake mounting part 13 via a rotating shaft (not shown in the figure). The foot brake 2 can rotate relative to the foot brake mounting part 13 between a braking position and a releasing position. The center of the guide arc surface 131 is located on the axis of the rotating shaft. The foot brake 2 is provided with a limiting part 2121. When the foot brake 2 rotates from the releasing position to the braking position, the front side of the limiting part 2121 rotates along the limiting vertical surface 132 to the guide arc surface 131, and the elastic foot brake structure 22 locks the caster 3. When the foot brake 2 rotates from the braking position to the releasing position, the front side of the limiting part 2121 rotates along the guide arc surface 131 to the guide arc surface 131. The limiting vertical surface 132 is used to reset the elastic foot brake structure 22 and press the limiting part 2121 onto the limiting vertical surface 132. By setting the limiting vertical surface 132 to limit the limiting part 2121, the foot brake 2 will not cross the release position when rotating from the braking position to the release position, thereby limiting the foot brake 2 and ensuring the stability of the foot brake 2. Compared with the existing technology that sets a limiting protrusion on the upper side of the foot brake plate 21 and places the limiting protrusion on the upper side of the upper side plate of the wheel frame body 11, it can ensure the limiting effect on the one hand, and will not encroach on the space above the wheel frame body 11 on the other hand. This is conducive to installing the caster 3 assembly on the bottom side of the cargo plate of the flatbed truck, which is conducive to the miniaturization of the flatbed truck.

[0031] It should be noted that the elastic foot brake structure 22 is existing technology, and the interaction between the foot brake plate 21 and the elastic foot brake structure 22 to brake and release the caster 3 is also existing technology, which will not be described in detail here.

[0032] Optionally, two foot brake mounting parts 13 are provided, which are spaced apart and arranged opposite to each other, forming a mounting groove 100 between the two foot brake mounting parts 13. The foot brake plate 21 includes a mounting part 212 and a foot pedal part 211 connected to each other. The mounting part 212 is located in the mounting groove on the front side of the foot pedal part 211 and is mounted on the foot brake mounting part 13 by a pivot. Limiting parts 2121 are provided on the left and right sides of the mounting part 212, which can realize the installation stability of the foot brake 2 on the one hand, and improve the limiting stability of the foot brake 2 on the other hand, thus improving the limiting effect of the foot brake 2.

[0033] Optionally, a limiting front side 2122 is provided on the front side of the mounting part 212. When the foot brake 2 is in the released position, the limiting front side 2122 abuts against the rear side of the upper side plate of the wheel frame body 11 to further enhance the limiting stability of the foot brake 2. The upper side of the mounting part 212 is flush with the upper side of the wheel frame body 11, or the upper side of the mounting part 212 is set lower than the upper side of the wheel frame body 11 to avoid the upper side of the mounting part 212 protruding from the upper side of the wheel frame body 11 and thus not obstructing the installation of the caster 3 assembly on the cargo plate.

[0034] Optionally, the upper side of the foot pedal 211 is provided with multiple anti-slip protrusions 2111 to facilitate the user stepping on the foot pedal 211.

[0035] Optionally, the mounting part 212 is provided with a first shaft hole 2120, and the foot brake mounting part 13 is provided with a second shaft hole 130 corresponding to the first shaft hole 2120. The rotating shaft passes through the second shaft hole 130 and the first shaft hole 2120, thereby rotatably mounting the foot brake mounting part 13 onto the wheel frame body 11.

[0036] Optionally, the wheel frame 1 also includes a connecting part 14 disposed on the upper side of the wheel frame body 11. The connecting part 14 is provided with a mounting flange 12. There is a mounting clearance 200 between the bottom side of the mounting flange 12 and the upper side of the wheel frame body 11, so as to facilitate the use of screws to lock the mounting flange 12 and the cargo plate together.

[0037] Another aspect of this utility model provides a flatbed vehicle, including a cargo platform and the aforementioned caster 3 assembly, wherein the caster 3 assembly is disposed on the bottom side of the cargo platform.

[0038] Optionally, multiple caster 3 assemblies are provided, with multiple caster 3 assemblies evenly distributed on the bottom side of the cargo platform.

[0039] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A caster assembly, characterized in that, include: The wheel frame (1) includes a wheel frame body (11) and a foot brake mounting part (13) disposed on the rear side of the wheel frame body (11). The rear side of the foot brake mounting part (13) is provided with a guide arc surface (131) and a limiting vertical surface (132) from bottom to top. Casters (3) are rotatably mounted on the wheel frame (1); The foot brake (2) includes a foot brake plate (21) mounted on the wheel frame (1) and an elastic foot brake structure (22). The foot brake plate (21) is rotatably connected to the foot brake mounting part (13) via a rotating shaft. The foot brake (2) can rotate relative to the foot brake mounting part (13) between the braking position and the release position. The center of the guide arc surface (131) is located on the axis of the rotating shaft. The foot brake (2) is provided with a limit part (2121). When the foot brake (2) rotates from the release position to the braking position... When the limiting part (2121) is in position, the front side of the limiting part (2121) rotates along the limiting vertical surface (132) to the guiding arc surface (131), and the elastic foot brake structure locks the caster (3). When the foot brake (2) rotates from the braking position to the releasing position, the front side of the limiting part (2121) rotates along the guiding arc surface (131) to the limiting vertical surface (132), and the elastic foot brake structure resets and presses the limiting part (2121) onto the limiting vertical surface (132).

2. The caster assembly according to claim 1, characterized in that, Two foot brake mounting parts (13) are provided, and the two foot brake mounting parts (13) are spaced apart and arranged opposite to each other. A mounting groove (100) is formed between the two foot brake mounting parts (13). The foot brake plate (21) includes a mounting part (212) and a foot pedal part (211) that are connected to each other. The mounting part (212) is located in the mounting groove (100) on the front side of the foot pedal part (211) and is mounted on the foot brake mounting part (13) through the pivot. The limiting part (2121) is provided on the left and right sides of the mounting part (212).

3. The caster assembly according to claim 2, characterized in that, The front side of the mounting part (212) is provided with a limiting front side (2122). When the foot brake (2) is in the release position, the limiting front side (2122) abuts against the rear side of the upper side plate of the wheel frame body (11). The upper side of the mounting part (212) is flush with the upper side of the wheel frame body (11), or the upper side of the mounting part (212) is lower than the upper side of the wheel frame body (11).

4. The caster assembly according to claim 2, characterized in that, The upper side of the foot pedal (211) is provided with multiple anti-slip protrusions (2111).

5. The caster assembly according to claim 2, characterized in that, The mounting part (212) has a first shaft hole (2120), and the foot brake mounting part (13) has a second shaft hole (130) corresponding to the first shaft hole (2120). The rotating shaft passes through the second shaft hole (130) and the first shaft hole (2120).

6. The caster assembly according to any one of claims 1-5, characterized in that, The wheel frame (1) also includes a connecting part (14) disposed on the upper side of the wheel frame body (11), and a mounting flange (12) is provided on the connecting part (14). There is a mounting clearance (200) between the bottom side of the mounting flange (12) and the upper side of the wheel frame body (11).

7. A flatbed cart, characterized in that, It includes a cargo platform and a caster assembly as described in any one of claims 1-6, the caster assembly being disposed on the underside of the cargo platform.

8. The flatbed truck according to claim 7, characterized in that, Multiple caster assemblies are provided, and the multiple caster assemblies are evenly distributed on the bottom side of the cargo plate.

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