CN203809468U - Lifting hook nut - Google Patents

Lifting hook nut Download PDF

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Publication number
CN203809468U
CN203809468U CN201420181087.2U CN201420181087U CN203809468U CN 203809468 U CN203809468 U CN 203809468U CN 201420181087 U CN201420181087 U CN 201420181087U CN 203809468 U CN203809468 U CN 203809468U
Authority
CN
China
Prior art keywords
hook nut
lifting hook
hook
nut
thin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420181087.2U
Other languages
Chinese (zh)
Inventor
胡水根
胡斌
杨小峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd
Original Assignee
Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd filed Critical Zhengzhou Kerun Mechanical & Electron Engineering Co Ltd
Priority to CN201420181087.2U priority Critical patent/CN203809468U/en
Application granted granted Critical
Publication of CN203809468U publication Critical patent/CN203809468U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

A lifting hook nut comprises a lifting hook nut body, and a counter bore type cavity used for mounting a bearing is formed in the threaded screwing end of the lifting hook nut body. The lifting hook nut is characterized in that an annular unloading groove is formed in the bottom face of the cavity of the lifting hook nut, and a thin-wall inner threaded section extending downwards is arranged on the inner side of the annular unloading groove, so that rigidity of original threads which bear large force is reduced, force is transferred to original threads which bear small force, and force borne by threads at main stress portions is relatively balanced.

Description

A kind of hook nut
Technical field
The utility model relates to a kind of load-engaging device of Hoisting Machinery, relates to specifically the structural type of the hook nut in a kind of Hoisting Machinery load-engaging device suspension hook group.
Background technique
Suspension hook group is the most frequently used load-engaging device of Hoisting Machinery, is also the most used parts of Hoisting Machinery, and it is normally made up of suspension hook, lifting beam with hook, hook nut, thrust-bearing, pulley, sheave block and arm-tie, as shown in Figure 1.The Security of suspension hook is very important in Hoisting Machinery, owing to frequently using aborning, is easy to cause fatigue ruption, and this fatigue ruption often occurs in the suspension hook neck of hook and hook nut joint, as shown in Figure 1.This is because each circle the stressed of worm tooth between hook and hook nut is not uniform, when hoisting heavy, hook is subject to pulling force, this power has been passed to nut by worm tooth, and stressed biggest place is the first lap screwing from bottom to top, and 2,3,4 circles afterwards stressedly successively decrease gradually.Have in addition stress to concentrate at the root of the tooth place of screw thread, therefore the damage of suspension hook often occurs in this place.
Want to change this situation, just must change stressing conditions herein, and the hook nut structural form of prior art as shown in Figure 2, the hook nut of this form is unfavorable for load distribution, that is to say the structural form that must change existing nut, the power relative equilibrium that a few circle screw threads at main stressed place are born, the stress that simultaneously also will reduce is herein concentrated (diminishing), only in this way could improve the fatigue strength of nut, increase working life.
Summary of the invention
The purpose of this utility model provides a kind of more rational hook nut of structure that can improve nut stressing conditions, especially stress concentration phenomenon for existing deficiency in above-mentioned prior art just.
The purpose of this utility model can realize by following technique measures:
Hook nut of the present utility model is included in screw thread and screws end and be provided with hook nut body for bearings mounted hole countersunk cavity, on the cavity bottom surface of described hook nut, offer an annulus spron, be provided with the thin-wall internal thread section to downward-extension in annulus spron inner side, thereby reduce former stressed large worm tooth rigidity, and power is transferred on former stressed little tooth to the power relative equilibrium that a few circle screw threads at main stressed place are born.
The outer ring surface of the pars infrasegmentalis of thin-wall internal thread described in the utility model is inverted cone-shaped structure, and the lower elongatedness of thin-wall internal thread section is less than the height of hole countersunk cavity outer wall.
The power relative equilibrium that the annulus spron increasing in the utility model can make a few circle screw threads at main stressed place bear, has reduced stress herein and has concentrated.
The beneficial effects of the utility model are as follows:
Structure of the present utility model can make nut maximum weighted place worm tooth stressed relatively even, and reduce herein stress and concentrate, improved nut usability, from improving closing Xing of Zong Neng ﹑ working efficiency and the safety reliability of Hoisting Machinery, this improvement has important practical significance and necessity.
Brief description of the drawings
Fig. 1 suspension hook group schematic diagram.
Fig. 2 prior art hook nut schematic diagram.
Fig. 3 Novel hook nut schematic diagram.
Fig. 4 is the enlarged view of I part in Fig. 3.
Sequence number in figure: the 1st, pulley, the 2nd, arm-tie, the 3rd, hook nut, the 4th, bearing, the 5th, suspension hook, the 6th, pulley crossbeam, the 7th, internal thread, the 8th, stress raiser, the 9th, hole countersunk cavity, the 10th, annulus spron, the 11st, thin-wall internal thread section.
Embodiment
The utility model is further described below with reference to embodiment's (accompanying drawing):
As shown in Figure 3,4, hook nut of the present utility model is included in screw thread and screws end and be provided with hook nut body for bearings mounted hole countersunk cavity 9, on the cavity bottom surface of described hook nut, offer an annulus spron 10, be provided with the thin-wall internal thread section 11 to downward-extension in annulus spron inner side, thereby reduce former stressed large worm tooth rigidity, and power is transferred on former stressed little tooth to the power relative equilibrium that a few circle screw threads at main stressed place are born; The outer ring surface of described thin-wall internal thread section 11 bottoms is inverted cone-shaped structure, and the lower elongatedness of thin-wall internal thread section 11 is less than the height of hole countersunk cavity outer wall.

Claims (1)

1. a hook nut, it is included in screw thread and screws end and be provided with hook nut body for bearings mounted hole countersunk cavity, it is characterized in that: on the cavity bottom surface of described hook nut, offer an annulus spron, be provided with the thin-wall internal thread section to downward-extension in annulus spron inner side; The outer ring surface of described thin-wall internal thread pars infrasegmentalis is inverted cone-shaped structure, and the lower elongatedness of thin-wall internal thread section is less than the height of hole countersunk cavity outer wall.
CN201420181087.2U 2014-04-15 2014-04-15 Lifting hook nut Expired - Fee Related CN203809468U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420181087.2U CN203809468U (en) 2014-04-15 2014-04-15 Lifting hook nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420181087.2U CN203809468U (en) 2014-04-15 2014-04-15 Lifting hook nut

Publications (1)

Publication Number Publication Date
CN203809468U true CN203809468U (en) 2014-09-03

Family

ID=51448225

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420181087.2U Expired - Fee Related CN203809468U (en) 2014-04-15 2014-04-15 Lifting hook nut

Country Status (1)

Country Link
CN (1) CN203809468U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105090219A (en) * 2015-08-28 2015-11-25 航天精工股份有限公司 Eccentric nut with circular groove
CN110307241A (en) * 2019-07-15 2019-10-08 中国航空工业集团公司北京长城计量测试技术研究所 A kind of shock tube anti-dropout big nut

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105090219A (en) * 2015-08-28 2015-11-25 航天精工股份有限公司 Eccentric nut with circular groove
CN110307241A (en) * 2019-07-15 2019-10-08 中国航空工业集团公司北京长城计量测试技术研究所 A kind of shock tube anti-dropout big nut

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140903

Termination date: 20170415