A backrest cart

Abstract

The embodiment of the present application provides a back frame trolley, comprising: a chassis frame, a plurality of moving wheels are arranged on the bottom of the chassis frame; a plurality of middle layer frames, the plurality of middle layer frames are connected in a stacking mode along the height direction of the back frame trolley and are connected to the top of the chassis frame; wherein the top of the chassis frame and each middle layer frame are respectively provided with a plurality of limiting piece groups for bearing the back frame and limiting displacement of the back frame, and the plurality of limiting piece groups are arranged in a spaced mode along the width direction of the back frame trolley. According to the technical scheme provided by the embodiment of the present application, the displacement of the back frame on the back frame trolley can be effectively limited by the limiting piece groups, so that the back frame is stably placed on the back frame trolley, thereby realizing stable transportation of the back frame by the back frame trolley, and the back frame trolley has the characteristics of stable structure, simple operation and strong practicability.

Claims

1. A back support cart, characterized by, include: A chassis frame, with multiple casters on its bottom; Multiple middle-layer frames are stacked and connected along the height direction of the back frame trolley and connected to the top of the chassis frame; The chassis frame and each of the middle frames are provided with a plurality of limiting member groups for supporting the back frame and limiting the displacement of the back frame. The plurality of limiting member groups are spaced apart along the width direction of the back frame trolley.

2. The back frame stroller of claim 1, wherein, The limiting component assembly includes a plurality of limiting blocks spaced apart along the length direction of the back frame trolley, and a plurality of limiting grooves spaced apart along the width direction of the back frame trolley on the limiting blocks, the limiting grooves extending through the limiting blocks along the length direction of the back frame trolley. The two adjacent limiting grooves have a common groove wall. The common groove wall and at least one groove wall located on the side are provided with limiting holes. A limiting pin is movably provided on the limiting hole, and a part of the limiting pin can extend into the limiting groove.

3. The back frame stroller of claim 2, wherein, The limiting pin includes a pin rod and a pin head connected to one end of the pin rod. The pin rod is movably disposed in the limiting hole and can partially extend into the limiting groove. The pin head is limited to the outside of the limiting hole. On the groove wall where the limiting pin is provided, there is a receiving groove with openings on the top and side surfaces corresponding to the position of the pin head, and the pin head can be received in the receiving groove.

4. The back frame stroller of claim 2, wherein, The height of the groove wall located near the center of the back frame trolley is greater than the height of the groove wall near the edge of the back frame trolley and the shared groove wall. The width of the shared groove wall is greater than the width of the groove wall located at the edge.

5. The back frame stroller of claim 2, wherein, The bottom of the limiting block is lower than the top of the chassis frame or the top of the middle frame; The groove wall located near the edge of the back frame trolley has an extended overlap on the side facing away from the limiting groove, and the extended overlap is connected to the top of the chassis frame or the top of the middle frame.

6. The back-frame trolley according to any one of claims 1 to 5, characterized in that, The chassis frame includes a chassis rectangular frame and a chassis support frame located within the chassis rectangular frame and connected to the chassis rectangular frame; The chassis support frame includes cross-connected chassis longitudinal beams and chassis cross beams. The chassis longitudinal beams extend along the length direction of the back frame trolley, and the chassis cross beams extend along the width direction of the back frame trolley. Multiple chassis limiting plates are provided between the chassis rectangular frame and the chassis support frame, and the multiple chassis limiting plates are connected to the limiting component assembly.

7. The back-frame trolley according to any one of claims 1 to 5, characterized in that, The middle frame includes a middle rectangular frame and a middle support frame located within and connected to the middle rectangular frame; A middle-layer connecting column is provided at the bottom of the four corners of the middle-layer rectangular frame and at the bottom of the middle-layer support frame. Multiple middle-layer frames are stacked and connected by the middle-layer connecting columns. The middle-layer frame at the bottom layer is connected to the chassis frame by the middle-layer connecting columns. The middle support frame includes cross-connected middle longitudinal beams and middle transverse beams. The middle longitudinal beams extend along the length direction of the back frame trolley, and the middle transverse beams extend along the width direction of the back frame trolley. Multiple middle-layer limiting plates are provided between the middle-layer rectangular frame and the middle-layer support frame, and the multiple middle-layer limiting plates are connected to the limiting component group.

8. The back frame stroller of any one of claims 1-5, wherein, Along the length of the back frame trolley, the bottom two ends of the chassis frame are respectively provided with first forklift limiting grooves; Along the width direction of the back frame trolley, in the area between the two first forklift limiting slots, the bottom ends of the chassis frame are respectively provided with a pair of second forklift limiting slots, and the two pairs of second forklift limiting slots are spaced apart along the length direction of the back frame trolley.

9. The back frame stroller of any one of claims 1-5, wherein, It also includes an upper frame, which is stacked and connected to one of the plurality of middle frames that is furthest from the chassis frame; The top of the upper frame is provided with multiple limiting foot sockets, and each of the multiple limiting foot sockets is positioned in a corresponding manner to one of the multiple movable wheels.

10. The back frame stroller of claim 9, wherein, The limiting foot socket includes a base plate and multiple side plates extending away from the middle frame; The base plate is connected to the upper frame, and a plurality of side plates are spaced apart on the base plate along the outer periphery of the base plate, forming a accommodating space for the limiting foot socket.

11. The back frame stroller of claim 9, wherein, The upper frame includes: an upper rectangular frame and an upper support frame located within the upper rectangular frame and connected to the upper rectangular frame; Upper connecting columns are respectively provided at the bottom of the four corners of the upper rectangular frame and at the bottom of the upper support frame, and the upper connecting columns are connected to the middle frame; The upper support frame includes upper longitudinal beams and upper transverse beams that are cross-connected. The limiting foot sockets are provided at the intersection of the upper transverse beams and the upper longitudinal beams. Alternatively, the upper transverse beams, the upper longitudinal beams, and the upper rectangular frame form a limiting area. The limiting area is provided with foot socket support plates that are respectively connected to the upper transverse beams, the upper longitudinal beams, and the upper rectangular frame. The limiting foot sockets are provided on the foot socket support plates.

12. The back frame stroller of claim 9, wherein, The middle frame is detachably connected to the chassis frame and the upper frame, respectively; Each of the aforementioned middle-layer frames can be detachably connected.

Images