CN-224200960-U - Tailless bolt sleeve

CN224200960UCN 224200960 UCN224200960 UCN 224200960UCN-224200960-U

Abstract

The utility model discloses a tailless bolt sleeve, which is an annular thread sleeve adopting a spring shape rolled by a steel wire, wherein a notch is arranged at the inner side of the tail end of the steel wire and is used as a force application groove, the outer teeth of the annular thread sleeve are standard threads, and the inner teeth of the annular thread sleeve are Shi Bi firm threads. The utility model has reasonable and ingenious structural design, the force application groove arranged at the tail end of the steel wire provides a force application point for the installation of the bolt sleeve, the bolt sleeve is convenient to disassemble and assemble without cutting, burrs are not generated to scratch the bolt, the firm threads are required to be applied, the anti-loosening performance is good, the anti-loosening device is used for an aluminum alloy machine body and a high-strength fastening bolt, and the integral connection strength can be improved.

Inventors

ZHAO KE
HE GAOFENG
REN LIMING
DU DONG
ZHANG HONGZHI
PAN YONG

Assignees

苏州施必牢精密紧固件有限公司

Dates

Publication Date: 20260505
Application Date: 20250609

Claims (2)

1. The tailless bolt sleeve is characterized in that a steel wire (1) is adopted to be coiled into an annular thread sleeve in a spring shape, a notch is formed in the inner side of the tail end of the steel wire (1), an application groove (2) is formed in the inner side of the tail end of the steel wire (1), an outer tooth (3) of the annular thread sleeve is a thread, an inner tooth (4) of the annular thread sleeve is a strong thread, a first contact surface (11), a second contact surface (12), a third contact surface (13), a fourth contact surface (14) and a fifth contact surface (15) are arranged on the longitudinal section of the steel wire (1), the connection end of the first contact surface (11) and the second contact surface (12) is in arc transition, an included angle of 120 DEG is formed between the second contact surface (12) and the third contact surface (13), an included angle of 60 DEG is formed between the third contact surface (13) and the fourth contact surface (14), the connection end of the third contact surface (13) and the fourth contact surface (14) is in arc transition, the connection end of the fourth contact surface (14) and the fifth contact surface (15) is in arc transition, and the connection end of the fifth contact surface (15) is in arc transition, and the included angle is formed between the fifth contact surface (11) and the fifth contact surface and the connection end is in arc transition.
2. The tailless bolt sleeve of claim 1, wherein an included angle of 90 ° is formed between a fourth contact surface of the upper layer wire and a second contact surface of the lower layer wire, and an included angle of 60 ° is formed between a fourth contact surface of the upper layer wire and a third contact surface of the lower layer wire, between upper and lower adjacent wires of the annular threaded sleeve.

Description

Tailless bolt sleeve Technical Field The utility model relates to a tailless bolt sleeve, and belongs to the technical field of fasteners. Background The steel wire bolt sleeve is made of steel wires with diamond cross sections, and is mechanically rolled into threads in a spring shape, and when the steel wire bolt sleeve is installed, the steel wire bolt sleeve is installed in a screw hole through an installation tool, and then a bolt is screwed in, so that the steel wire bolt sleeve is arranged between the screw hole and the bolt, and the strength and the wear resistance of threaded connection are improved by increasing the contact area. In order to be convenient for install of traditional bolt housing, can set up the steel wire of a section bending at the afterbody of bolt housing, after the bolt housing is installed in place, cut the steel wire of buckling, the section has the burr, the easy fish tail bolt, be difficult to dismantle the change after the bolt housing is good simultaneously. The bolt sleeve applied to the photovoltaic speed reducer is in a vibration state for a long time, so that the bolt sleeve with the diamond-shaped cross section is easy to slip, the bolt is loose, the normal operation of the speed reducer can be influenced, the maintenance frequency of the speed reducer is improved, and the working efficiency is reduced. There is a need for a bolt housing that prevents loosening and is easy to assemble and disassemble. Disclosure of utility model In order to overcome the defects, the utility model provides the tailless bolt sleeve which is not easy to loosen and convenient to assemble and disassemble. The utility model adopts a structure that a tailless bolt sleeve is an annular thread sleeve which is formed by rolling a steel wire into a spring shape, a notch is arranged at the inner side of the tail end of the steel wire and is used as a force application groove, the outer teeth of the annular thread sleeve are standard threads, and the inner teeth of the annular thread sleeve are Shi Bi firm threads. The longitudinal section of the steel wire is provided with a first contact surface, a second contact surface, a third contact surface, a fourth contact surface and a fifth contact surface, the connection end of the first contact surface and the second contact surface is in arc transition, an included angle of 120 degrees is formed between the second contact surface and the third contact surface, an included angle of 60 degrees is formed between the third contact surface and the fourth contact surface, the connection end of the third contact surface and the fourth contact surface is in arc transition, the connection end of the fourth contact surface and the fifth contact surface is in arc transition, an included angle of 60 degrees is formed between the fifth contact surface and the first contact surface, and the connection end of the fifth contact surface and the first contact surface is in arc transition. The annular thread sleeve is arranged between the upper and lower adjacent steel wires, an included angle of 90 degrees is formed between the fourth contact surface of the upper layer steel wire and the second contact surface of the lower layer steel wire, and an included angle of 60 degrees is formed between the fourth contact surface of the upper layer steel wire and the third contact surface of the lower layer steel wire. The anti-loosening device has the beneficial effects that the structural design is reasonable and ingenious, the force application groove arranged at the tail end of the steel wire provides a force application point for the installation of the bolt sleeve, the bolt sleeve is convenient to disassemble and assemble, shearing is not needed, burrs cannot be generated to scratch the bolt, the firm threads have good anti-loosening performance, and the anti-loosening device is used for an aluminum alloy machine body and a high-strength fastening bolt and can improve the integral connection strength. Drawings The utility model will now be described by way of example and with reference to the accompanying drawings in which: FIG. 1 is a perspective view of the present utility model; FIG. 2 is a cross-sectional view of the present utility model; Fig. 3 is a cross-sectional view of the wire. Detailed Description The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model. In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present ut