Down-pressing self-locking caster wheel

Abstract

The application discloses a down-pressing self-locking caster, which comprises a connecting support, rollers arranged on the front and back sides of the connecting support, a connecting shaft, an embedded sliding limiting piece and an elastic expansion piece. An accommodating slot with a downward opening is formed in the middle of the connecting support, and a lower convex clamping part is arranged on the front and back sides of the accommodating slot. An elongated through hole is formed in the lower convex clamping part and is in communication with the accommodating slot. An inner recess is formed in the inner side of the roller, and a plurality of middle protruding parts are arranged on the inner side of the inner recess and are spaced apart along the circumferential direction. A clamping recess is formed in the middle protruding part and is adapted to clamp the lower convex clamping part. The connecting shaft penetrates through the accommodating slot and the elongated through hole and is connected with the rollers arranged on the front and back sides of the connecting support. The embedded sliding limiting piece is slidably connected in the accommodating slot, and a connecting hole is formed in the embedded sliding limiting piece. The elastic expansion piece is arranged between the accommodating slot and the embedded sliding limiting piece and is used for elastically resetting the embedded sliding limiting piece, the connecting shaft and the roller.

Claims

1. A self-locking caster, comprising a connecting bracket (1) and rollers (2) disposed on the front and rear sides of the connecting bracket (1), characterized in that: The connecting bracket (1) has a downward-facing accommodating slot (100) in the middle, and it also has a downward-protruding locking part (101) on the front and rear sides of the accommodating slot (100). The downward-protruding locking part (101) has an elongated through hole (1011) that runs through the front and rear and is connected to the accommodating slot (100). The roller (2) has an inner cavity (200) on its inner side. The inner periphery of the inner cavity (200) is provided with a plurality of centrally protruding parts (201) spaced apart along the periphery. The centrally protruding parts (201) are provided with a snap-fit ​​recess (2011) that can be adapted to snap-fit ​​with the lower protruding snap-fit ​​part (101). The self-locking caster also includes: A connecting shaft (3) passes through the receiving slot (100) and the elongated through hole (1011) and is connected to the rollers (2) located on the front and rear sides of the connecting bracket (1); An embedded sliding limiter (4) is slidably connected inside the receiving slot (100), and a clearance connecting hole (41) is provided on it for accommodating the connecting shaft (3). An elastic telescopic member (5) is disposed between the receiving slot (100) and the embedded sliding limit member (4) for elastically resetting the embedded sliding limit member (4), the connecting shaft (3), and the roller (2).

2. The down-pressure self-locking caster according to claim 1, characterized by The length and height of the lower convex locking part (101) are both smaller than the radial dimension of the inner cavity (200).

3. The down-pressure self-locking caster according to claim 1, characterized by, The connecting bracket (1) is also provided with relief grooves (102) on the front and rear sides to allow the roller (2) to pass; The lower protruding locking part (101) is located inside the relief groove (102).

4. The toe lock wheel of claim 1, wherein, The elastic telescopic component (5) is a compression spring.

5. The toe lock wheel of claim 1, wherein, The connecting bracket (1) has an upwardly protruding upper protrusion (103) on its left side, and the upper protrusion (103) has an external protrusion (104) for connecting external components.

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