Reinforced coil spring of a hose reel
AssigneeYongkang Haili Industrial Co., Ltd.
InventorYujun Shao
Life of this patent
Estimating the term…
Abstract
The reinforced coil spring of a hose reel includes a steel leaf spring being arranged on an inside surface of the outermost spring-coil. An outer end tip of the steel leaf spring and the outermost spring-coil are fixedly connected, and an inner end tip of the steel leaf spring is located between the outermost spring-coil and a second-outer spring-coil. The steel leaf spring added in the reinforced coil spring of a hose reel can not only enhance the tightening force of the outermost spring-coil of the coil spring, but avoid increasing the maximum pullout force of the coil spring, while achieving low production cost. The ear hook in the reinforced coil spring of a hose reel has better overall strength, and an opening of the ear hook is less prone to expanding during use.
Claims13
A reinforced coil spring of a hose reel, comprising:
- a coil spring formed by coiling a coil spring leaf,
- an outer end tip of the coil spring being bent to form an ear hook, and
- an opening of the ear hook being located on an outer side of an outermost spring-coil,
- wherein a steel leaf spring is arranged on an inside surface of the outermost spring-coil, an outer end tip of the steel leaf spring and the outermost spring-coil are fixedly connected, and
- wherein an inner end tip of the steel leaf spring is located between the outermost spring-coil and a second-outer spring-coil;
- wherein the steel leaf spring is provided with a plurality of first riveting holes, wherein the back surface of the steel leaf spring is provided with a positioning protrusion, wherein the positioning protrusion is located among the plurality of first riveting holes, wherein the outermost spring-coil is provided with a plurality of second riveting holes, wherein the outermost spring-coil is provided with a positioning hole matched with the positioning protrusion, and wherein the positioning hole is located among the plurality of second riveting holes.
The reinforced coil spring, as claimed in 1, wherein an outer end tip of the steel leaf spring and the outermost spring-coil are fixedly connected through a fastener;
- and wherein a steel leaf spring extension section with a certain length is reserved between a fixed position of the fastener and the outer end surface of the steel leaf spring.
Dependencies are inferred from the claim text.