Search

CN-117621707-B - Caster with circulating type positioning structure

CN117621707BCN 117621707 BCN117621707 BCN 117621707BCN-117621707-B

Abstract

The invention relates to a castor with a circulating type positioning structure, which is characterized in that a driving rod and a driving piece are driven to rotate by stepping on a pedal, so that a positioning bolt on the driving piece circularly moves among a first positioning point, a second positioning point and a path point of a positioning piece, a cam unit is driven to push an axle center, the positioning piece and a positioning hole are clamped or separated from each other, and a clamping end of a clamping piece is clamped or separated from a clamping groove, so that the effects of stopping, prohibiting the rotation of the castor or releasing and rotating the castor at will are achieved.

Inventors

  • LIN QINGSONG

Assignees

  • 取德工业股份有限公司

Dates

Publication Date
20260505
Application Date
20220809

Claims (7)

  1. 1. A caster having a circulating type positioning structure, comprising: The driving assembly is provided with a driving rod pivoted on the bracket and a driving piece fixed on the driving rod, and the driving piece is provided with a convex abutting part and a positioning bolt arranged on the convex abutting part; the positioning piece is provided with a pivoting part pivoted on the bracket through a pivot rod, the positioning piece is provided with a first positioning part protruding towards the driving piece, a first positioning point is formed between the side edge of the first positioning part, which is nearer to the pivot rod, and the side edge of the pivoting part, the positioning piece is provided with a second positioning part connected with the first positioning part and the pivoting part, a second positioning point is formed between the second positioning part and the first positioning part, the second positioning part is provided with a guide inclined plane inclined towards the bracket, the positioning piece is provided with a third positioning part, the third positioning part is connected with the pivoting part, the third positioning part is connected with the second positioning part, and a path point is formed between the third positioning part and the second positioning part; the elastic piece is sleeved on the pivot rod, one end of the elastic piece is fixed on the bracket, and the other end of the elastic piece is fixed on the positioning piece; The cam unit is provided with a cam fixedly connected with the driving rod, the cam is provided with a first positioning part and a second positioning part which are concavely arranged from the edge, the first positioning part is provided with a first bottom surface, the second positioning part is provided with a second bottom surface, the distance between the first bottom surface and the driving rod is larger than the distance between the second bottom surface and the driving rod, and the cam unit is further provided with a propped piece which is propped against the cam continuously; An axle center connected with the propped piece; The positioning unit is provided with a positioning piece sleeved on the axle center and fixed, and a positioning piece sleeved on the axle center and displaced along with the axle center, the positioning piece is provided with a positioning hole for the axle center to pass through, and the positioning piece is provided with a clamping part protruding from the periphery; The foot wheel group is fixedly connected with the driving component.
  2. 2. The caster with a circulating type positioning structure as claimed in claim 1, wherein the elastic member is a torsion spring.
  3. 3. The caster of claim 1, wherein said caster group has casters for rolling on the ground.
  4. 4. The caster of claim 1, wherein said driving assembly further comprises a tread structure provided on said driving rod, said tread structure comprising two side plates fixedly connected to said driving rod, and a pedal connecting said two side plates.
  5. 5. The caster of claim 1, wherein said driving assembly further comprises a retraction spring, one end of said retraction spring is fixed to said driving plate, and the other end of said retraction spring is fixed to said bracket.
  6. 6. The caster with a circulating type positioning structure as claimed in claim 1, wherein the driving rod has a polygonal cross section, the driving plate has a polygonal hole, and the driving plate is sleeved into the driving rod to be fixed by the polygonal hole.
  7. 7. The caster of claim 1, wherein said positioning member further comprises a hook connected to said third positioning portion, said hook having a hook surface facing said driving rod, an opening being formed between said hook and said first positioning portion, said hook surface being inclined toward said opening.

Description

Caster with circulating type positioning structure Technical Field The invention relates to the technical field of wheel sets, in particular to a castor with a circulating type positioning structure. Background Generally, in order to facilitate and save effort for moving the carrier (hospital bed, precision instrument or workbench, etc.), casters are usually disposed under the carrier, and the casters are fixed by other stopping components after the carrier moves to a fixed point through the casters, the stopping components mainly achieve the effect of stopping the casters by stepping on the brake pedal, and when the casters are required to be released, the release pedal is additionally used for stepping on to release the casters, but the brake pedal and the release pedal are close in position, so that the problem of stepping on the pedal by mistake easily occurs. In view of the foregoing, it is necessary to provide a technical means for solving the foregoing problems. Disclosure of Invention The invention aims to solve the problem that the caster is easy to step on by stopping or releasing two different pedals. In order to solve the foregoing problems, the present invention is a caster with a circulating positioning structure, comprising: The driving assembly is provided with a driving rod pivoted on the bracket and a driving piece fixed on the driving rod, and the driving piece is provided with a convex abutting part and a positioning bolt arranged on the convex abutting part; The positioning piece is provided with a pivoting part pivoted on the bracket through a pivot rod, the positioning piece is provided with a first positioning part protruding towards the driving piece, a first positioning point is formed between the side edge of the first positioning part, which is nearer to the pivot rod, and the side edge of the pivoting part, the positioning piece is provided with a second positioning part connected with the first positioning part and the pivoting part, a second positioning point is formed between the second positioning part and the first positioning part, the second positioning part is provided with a guide inclined plane inclined towards the bracket, the positioning piece is provided with a third positioning part, the third positioning part is connected with the pivoting part, the third positioning part is connected with the second positioning part, and a path point is formed between the third positioning part and the second positioning part; the elastic piece is sleeved on the pivot rod, one end of the elastic piece is fixed on the bracket, and the other end of the elastic piece is fixed on the positioning piece; The cam unit is provided with a cam fixedly connected with the driving rod, the cam is provided with a first positioning part and a second positioning part which are concavely arranged from the edge, the first positioning part is provided with a first bottom surface, the second positioning part is provided with a second bottom surface, the distance between the first bottom surface and the driving rod is larger than the distance between the second bottom surface and the driving rod, and the cam unit is further provided with a propped piece which is propped against the cam continuously; the axle center is abutted against the abutted piece; The positioning unit is provided with a positioning piece sleeved on the axle center and fixed, and a positioning piece sleeved on the axle center and displaced along with the axle center, the positioning piece is provided with a positioning hole through which the main shaft passes, and the positioning piece is provided with a clamping part protruding from the periphery; the foot wheel group is fixedly connected with the axle center. In a preferred embodiment, the elastic member is a torsion spring. In a preferred embodiment, the caster set has casters for rolling on the ground. In a preferred embodiment, the driving assembly further has a stepping structure disposed on the driving rod, and the pedal has two side plates fixedly connected to the driving rod, and a pedal connecting the two side plates. In a preferred embodiment, the driving assembly further has a retraction spring, one end of the retraction spring is fixed to the driving plate, and the other end of the retraction spring is fixed to the bracket. In a preferred embodiment, the driving rod is polygonal in cross section, the driving plate is provided with a polygonal hole, and the driving plate is sleeved into the driving rod to be fixed through the polygonal hole. In a preferred embodiment, the positioning member further has a hook portion connected to the third positioning portion, the hook portion has a hook surface facing the driving rod, an opening is formed between the hook portion and the first positioning portion, and the hook surface is inclined toward the opening. The user drives the driving piece to rotate by stepping on the pedal, so that the positioning bolt of the driving piece