NL2024548A - Micro Clearance Eliminating Device of Screw Rod-and-Nut Pair - Google Patents

Micro Clearance Eliminating Device of Screw Rod-and-Nut Pair Download PDF

Info

Publication number
NL2024548A
NL2024548A NL2024548A NL2024548A NL2024548A NL 2024548 A NL2024548 A NL 2024548A NL 2024548 A NL2024548 A NL 2024548A NL 2024548 A NL2024548 A NL 2024548A NL 2024548 A NL2024548 A NL 2024548A
Authority
NL
Netherlands
Prior art keywords
nut
screw rod
internal
hole
wedge
Prior art date
Application number
NL2024548A
Other languages
Dutch (nl)
Other versions
NL2024548B1 (en
Inventor
Li Zhifeng
Zhao Jialei
Zhang Limin
Zhao Yongqjang
Original Assignee
Univ Shaanxi Technology
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 Univ Shaanxi Technology filed Critical Univ Shaanxi Technology
Publication of NL2024548A publication Critical patent/NL2024548A/en
Application granted granted Critical
Publication of NL2024548B1 publication Critical patent/NL2024548B1/en

Links

Landscapes

  • Transmission Devices (AREA)

Abstract

A micro clearance eliminating device of a screw rod-and-nut pair comprises a nut shell 1, a screw rod 2, a wedge-shaped block 3, an adjusting screw 4, an internal nut 5, two springs 6, two pin column blocks 7 and an end cover 8; and the adjusting screw 4 is tightened to drive the wedge-shaped block 3 to move radially and unceasingly extrude the spring 6, so that the threads on the internal nut 5 and the threads on the nut shell 1 are respectively abutted against the threads on the screw rod 2, which can achieve the effect of axial clearance elimination. The clearance eliminating device extremely increases the service life of the matching of the screw rod and the nut thread, has simple structure, and is easy to install and convenient to operate, thereby extremely saving the economic costs.

Description

Micro Clearance Eliminating Device of Screw Rod-and-Nut Pair Technical Field The present invention belongs to the field of mechanical transmission and relates to a micro clearance eliminating device of a screw rod-and-nut pair. Background An existing nut mainly has an integral structure and a combined structure. An integral nut is a complete structure and is directly used in combination with a screw rod, but since the threads thereof are easy to wear, the accuracy is reduced when the threads drive directly and reversely, which is frequently used in a transmission mechanism with low accuracy requirement; and the combined nut divides a nut into several parts and can be adjusted internally multiple times, to achieve a purpose that the wear of the threads is eliminated, thereby extremely increasing the accuracy and durability of the transmission of the screw rod-nut, which is frequently used in a bidirectional helical transmission structure. Therefore, in order to guarantee that the reversing rotation of the screw rod has no clearance, the transmission of the combined nut is often adopted, but the existing combined nut is internally complicated, and is not easy to be operated and installed.
Thus, a micro clearance eliminating device of a screw rod-and-nut pair is proposed, and the nut is divided into several parts, and an idle stroke that appears because the screw rod drives directly and reversely in an axial direction can be eliminated by adjusting the screws, and the accurate transmission of the screw rod is achieved.
Summary The present invention has the following technical solution: a micro clearance eliminating device of a screw rod-and-nut pair comprises a nut shell 1, a screw rod 2, a wedge-shaped block 3, an adjusting screw 4, an internal nut 5, two springs 6, two pin column blocks 7 and an end cover 8; an external shape of the nut shell 1 is cylinder, and an internal shape is a structure formed by a square blind hole and a center threaded hole; the internal nut 5 and the wedge-shaped block 3 are installed in the square blind hole of the nut shell 1; the internal nut 5 and wedge-shaped block 3 are contacted through an inclined plane, and rotate coaxially with the nut shell 1; the adjusting screw 4 is connected with the wedge-shaped block 3 through a housing of the nut shell
1; the screw rod 2 passes through threaded holes on the nut shell 1 and the internal nut 5; and the end cover 8 is installed on an end of the square blind hole on the nut shell 1 through a plurality of fixing screws, and the internal nut 5 and the wedge-shaped block 3 are sealed in the square blind hole of the nut shell 1.
The wedge-shaped block 3 is composed of a wedge-shaped surface 3-1, an unthreaded hole 3-2 and an adjusting threaded hole 3-3; the screw rod 2 passes through the unthreaded hole 3-2, and the diameter of the unthreaded hole 3-2 is more than that of the screw rod; and the adjusting screw 4 is in threaded connection with the adjusting threaded hole 3-3, and the adjusting screw 4 drives the wedge-shaped surface 3-1 on the wedge-shaped block 3 to move along an inclined plane 5-3 on the internal nut 5 and unceasingly extrude the threads on the internal nut 5 to be abutted against the threads on the screw rod 2. The internal nut 5 is composed of an internal threaded hole 5-1, two positioning holes 5-2, an inclined plane 5-3 and a square body; the internal threaded hole 5-1 on the internal nut 5 is in threaded connection with the screw rod 2; and the springs 6 are respectively installed on two pin column blocks 7, and the two pin column blocks 7 are respectively installed in two positioning holes 5-2. The nut shell 1 is composed of a square blind hole 1-1, a center threaded hole 1-2, four countersink slot holes 1-3 and an adjusting hole 1-4; the internal nut 5 and the wedge- shaped block 3 are installed in the square blind hole 1-1 of the nut shell 1, and must not be rotated; and the end cover 8 is installed on the corresponding four countersink slot holes 1-3 on the nut shell 1 through a plurality of fixing screws. A clearance eliminating method for micro clearance eliminating device of a screw rod-and-nut pair is that tightening the adjusting screw 4 to drive the right side of the wedge-shaped block 3 to extrude the internal nut 5, to cause the right side of threads on the internal nut 5 to be abutted against the left side of threads of the screw rod 2; and extruding the nut shell 1 through a left side of the wedge-shaped block 3, to cause the left side of threads of the nut shell 1 to be abutted against the right side of threads of the screw rod 2, so that an idle stroke that appears because the screw rod 2 drives directly and reversely can be eliminated. The micro clearance eliminating device of a screw rod-and-nut pair has the following beneficial effects: A complete nut is divided into three parts, the wedge-shaped block is adopted as an intermediate transmission part, at the same time, the spring is adopted to increase an activity adjustment space for the wedge-shaped block, and another nut is fixed to provide extrusion power. The axial clearance generated due to the wear of the screw rod and the nut can be eliminated by adjusting the screws; and the structure is simple, the installation is easy and the operation is convenient, and the elimination can be achieved by adjusting the screws many times, thereby extremely saving the economic costs.
Description of Drawings Fig. 1 is a sectional view of a micro clearance eliminating device of a screw rod-and- nut pair in the present invention.
Fig. 2 is a structure diagram of a wedge-shaped block in the present invention.
Fig. 3 is a structure diagram of an internal nut in the present invention. Fig. 4 is a structure diagram of a nut shell in the present invention. Detailed Description The implementation process of the present invention will be described below in details in conjunction with the accompanying drawings.
As shown in Fig. 1, a micro clearance eliminating device of a screw rod-and-nut pair comprises a nut shell 1, a screw rod 2, a wedge-shaped block 3, an adjusting screw 4, an internal nut 5, two springs 6, two pin column blocks 7 and an end cover 8; and the adjusting screw 4 is tightened to drive the wedge-shaped block 3 to move radially and unceasingly extrude the spring 6, so that the threads on the internal nut 5 and the threads on the nut shell 1 are respectively abutted against the threads on the screw rod 2, which can achieve the effect of axial clearance elimination.
As shown in Fig. 2 and Fig. 3, the wedge-shaped block 3 is composed of a wedge- shaped surface 3-1, an unthreaded hole 3-2 and an adjusting threaded hole 3-3; the screw rod 2 passes through the unthreaded hole 3-2, and the diameter of the unthreaded hole 3-2 is more than that of the screw rod; and the adjusting screw 4 is connected with the adjusting threaded hole 3-3 to drive the wedge-shaped block 3 to extrude the internal nut 5, so that the threads on the nut shell 1 and the threads on the internal nut 5 are respectively abutted against both sides of the threads on the screw rod 2; the internal nut 5 is composed of an internal threaded hole 5-1, two positioning holes 5-2, an inclined plane 5-3 and a square body; the internal threaded hole 5-1 on the internal nut 5 is in threaded connection with the screw rod 2; and the springs 6 are respectively installed on two pin column blocks 7, and the two pin column blocks 7 are respectively installed in two positioning holes 5-2.
As shown in Fig. 4, the nut shell 1 is composed of a square blind hole 1-1, a center threaded hole 1-2, four countersink slot holes 1-3 and an adjusting hole 1-4; the wedge- shaped block 3 is installed in the square blind hole 1-1 of the nut shell 1, and is in threaded connection with the adjusting screw 4; and the end cover 8 is installed on the corresponding four countersink slot holes 1-3 on the nut shell 1 through a plurality of fixing screws, and is used for sealing the nut shell 1 and providing extrusion pressure for the spring 6. The present invention has the working process that: The adjusting screw 4 is tightened to make the wedge-shaped surface 3-1 on the wedge-shaped block 5 and the inclined plane 5-3 on the internal nut 5 mutually extrude, and the threads on the internal nut 5 are unceasingly driven to be abutted against the threads on the screw rod 2, so that the both sides of the threads of the screw rod 2 are respectively mutually abutted against the threads of the nut shell 1 and the internal nut 2, thereby finally achieving the elimination of the axial clearance that appears because the screw rod 2 rotates directly and reversely.
The present invention has the operating principle that: in a micro clearance eliminating device of a screw rod-and-nut pair, the wedge- shaped 3 is adopted as a core component of an extruding movement process, the adjusting screw 4 drives the wedge-shaped block to unceasingly extrude the spring 6, to make the internal nut 5 unceasingly move in an axial direction and extrude the threads until the axial clearance of the threads is eliminated; and by repeatedly adjusting the adjusting screw 4, the wear of the threads appeared in a transmission process of the screw rod and nut can be made up, thereby extremely increasing the service life of the matching of the screw rod and the nut thread.

Claims (4)

CONCLUSIESCONCLUSIONS 1. Een microspeling eliminerende inrichting van een schroefstaaf-en-moer paar met het kenmerk dat deze omvat een moerbehuizing (1), een 5 schroefstaaf (2), een wigvormig blok (3), een stelschroef (4), een interne moer (5), twee veren (6), twee pins kolom blokken (7) en een einddeksel (8),waarbij een moerbehuizing (1) een cilinder is en een binnenkant bestaat uit een vierkante sleuf en een schroefgat; de interne moer (5) en het wigvormige blok (3) geïnstalleerd zijn op de vierkante gleuf van de moerbehuizing (1), en de interne moer (5) en het wigvormige blok (3) in contact zijn gebracht via een schuine vlak en beide niet axiaal kunnen worden geroteerd; de stelschroef (4) verbonden is met het wigvormige blok (3) via een verzonken sleufgat op de moerbehuizing (1); en het einddeksel (8) geïnstalleerd is op een uiteinde van het vierkante gat op de moerbehuizing (1) door een aantal bevestigingsschroeven, en de interne moer (5) en het wigvormige blok (3) zijn verzegeld in de moerbehuizing (1).A micro-play eliminating device of a screw rod and nut pair characterized in that it comprises a nut housing (1), a screw rod (2), a wedge block (3), a set screw (4), an internal nut ( 5), two springs (6), two pin column blocks (7) and an end cover (8), where a nut housing (1) is a cylinder and an inside consists of a square slot and a screw hole; the internal nut (5) and the wedge block (3) are installed on the square slot of the nut housing (1), and the internal nut (5) and the wedge block (3) are brought into contact through an oblique plane and both cannot be rotated axially; the set screw (4) is connected to the wedge block (3) through a recessed slotted hole on the nut housing (1); and the end cover (8) is installed on one end of the square hole on the nut housing (1) by a plurality of fixing screws, and the internal nut (5) and the wedge block (3) are sealed in the nut housing (1). 2. De microspeling eliminerende inrichting van een schroefstaaf-en-moer paar volgens conclusie 1 met het kenmerk dat het wigvormige blok (3) is samengesteld uit een wigvormig oppervlak (3-1) , een gat zonder schroefdraad (3-2) en een instellend schroefdraadgat (3-3), de schroefstaaf (2) gaat door het gat zonder schroefdraad(3-2) en de diameter van het gat zonder schroefdraad(3-2) is groter dan die van de schroefstaaf; en de stelschroef (4) is in schroefdraadverbinding met het stelschroefgat (3-3), en de stelschroef (4) drijft het wigvormige oppervlak (3-1) op het wigvormige blok (3) om langs het schuine vlak (5-3) beweging uit te oefenen op de interne moer (5) en onophoudelijk de schroefdraden te persen op de interne moer (5) om tegen de schroefdraden op de schroefstaaf (2) aan te komen.The screw bar-nut pair micro-play eliminating device according to claim 1 characterized in that the wedge-shaped block (3) is composed of a wedge-shaped surface (3-1), an unthreaded hole (3-2) and a setting threaded hole (3-3), the screw rod (2) passes through the hole without thread (3-2), and the diameter of the hole without thread (3-2) is larger than that of the screw rod; and the set screw (4) is in threaded connection with the set screw hole (3-3), and the set screw (4) drives the wedge-shaped surface (3-1) on the wedge-shaped block (3) along the oblique plane (5-3) movement on the internal nut (5) and continuously pressing the threads on the internal nut (5) to butt against the threads on the screw rod (2). 3. De microspeling eliminerende inrichting van een schroefstaaf-en-moer paar volgens conclusie 1 met het kenmerk dat de interne moer (5) is samengesteld uit een inwendig schroefdraadgat (5-1), twee positioneringsgaten (5-2), een hellend vlak (5-3) en een vierkant lichaam;The screw bar-and-nut pair micro-play eliminating device according to claim 1, characterized in that the internal nut (5) is composed of an internal threaded hole (5-1), two positioning holes (5-2), an inclined plane (5-3) and a square body; het interne schroefdraadgat (5-1) op de interne moer (5) in schroefdraadverbinding staat met de schroefstaaf (2); en de veren (6) respectievelijk geïnstalleerd zijn op twee pins kolomblokken (7), en de twee pins kolomblokken (7) respectievelijk zijn geïnstalleerd in twee positioneringsgaten (5-2).the internal threaded hole (5-1) on the internal nut (5) is in threaded connection with the threaded rod (2); and the springs (6) are respectively installed on two pin column blocks (7), and the two pin column blocks (7) are respectively installed in two positioning holes (5-2). 4. De microspeling eliminerende inrichting van een schroefstaaf-en-moer paar volgens conclusie 1 met het kenmerk dat de moerbehuizing (1) is samengesteld uit een vierkant blind gat (1-1), een gat met centrale schroefdraad (1-2), vier verzonken sleufgaten (1-3) en een afstelgat (1-4) de interne moer (5) en het wigvormige blok (3) geïnstalleerd zijn in het vierkante blinde gat (1-1) van de moerbehuizing (1) en niet gedraaid mogen worden: en het einddeksel (8) geïnstalleerd is op de overeenkomstige vier verzonken sleufgaten (1-3) op de moerbehuizing (1) door de schroef.The screw bar-and-nut pair micro-play eliminating device according to claim 1, characterized in that the nut housing (1) is composed of a square blind hole (1-1), a central threaded hole (1-2), four recessed slotted holes (1-3) and one adjustment hole (1-4) the internal nut (5) and the wedge block (3) are installed in the square blind hole (1-1) of the nut housing (1) and not turned and the end cover (8) is installed on the corresponding four recessed slotted holes (1-3) on the nut housing (1) by the screw.
NL2024548A 2019-04-11 2019-12-20 Micro Clearance Eliminating Device of Screw Rod-and-Nut Pair NL2024548B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910287073.6A CN109838526A (en) 2019-04-11 2019-04-11 A kind of micro- backlash eliminating equipment of bolt and nut pair

Publications (2)

Publication Number Publication Date
NL2024548A true NL2024548A (en) 2020-10-15
NL2024548B1 NL2024548B1 (en) 2021-10-04

Family

ID=66886949

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2024548A NL2024548B1 (en) 2019-04-11 2019-12-20 Micro Clearance Eliminating Device of Screw Rod-and-Nut Pair

Country Status (2)

Country Link
CN (1) CN109838526A (en)
NL (1) NL2024548B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022142957A1 (en) * 2020-12-28 2022-07-07 深圳市纵维立方科技有限公司 Transmission assembly and three-dimensional printing device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111730600B (en) * 2020-07-13 2022-11-25 安徽思卡瑞自动化工程有限公司 Kinematic pair joint clearance eliminating mechanism of feeding robot and implementation method thereof
CN112503148A (en) * 2020-11-19 2021-03-16 中国科学院上海光学精密机械研究所 Preload-adjustable precision guide screw rod displacement mechanism

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1407810A (en) * 1964-06-25 1965-08-06 Screw and nut transmission device
GB1293430A (en) * 1970-12-30 1972-10-18 Zeiss Jena Veb Carl Screw and nut mechanism with adjustable axial backlash
GB1401786A (en) * 1972-09-19 1975-07-30 Shamban & Co W S Screw and nut assembly
GB1345136A (en) * 1972-12-15 1974-01-30 Philadelphia Gear Corp Anti-backlash screw jack
DE102007038064A1 (en) * 2007-08-11 2009-02-26 Lsf Maschinen- Und Anlagenbau Gmbh & Co. Kg Adjusting device for positioning axially guided machine unit, has driver frictionally connected with support by clamping element in fixed condition, where driver is fixed opposite to support for axial adjustment of machine unit
CN101251178A (en) * 2008-03-24 2008-08-27 上海第二工业大学 Apparatus for extinguishing crack and closing beforehand of lead screw of transmission mechanism
CN101698284B (en) * 2009-10-27 2013-06-12 李慎旺 Device for automatically eliminating clearances of screw drive pair
KR20130006025U (en) * 2012-04-08 2013-10-16 도재상 A low backlash device of the lead screw
CN102785391A (en) * 2012-08-29 2012-11-21 太仓奥科机械设备有限公司 Height adjusting device
CN203309043U (en) * 2013-05-06 2013-11-27 台州跃尔自动化设备有限公司 Ball screw with adjustable gap
CN204372078U (en) * 2014-12-22 2015-06-03 常州市鼎智机电有限公司 A kind of torsion spring disappears gap nut
CN205479202U (en) * 2016-01-20 2016-08-17 昆明理工大学 Two nuts of lead screw crack mechanism that disappears
CN107165999B (en) * 2017-06-01 2019-05-07 中国科学院国家天文台南京天文光学技术研究所 The guiding mechanism that slides axially of bolt and nut pair
CN207034113U (en) * 2017-08-10 2018-02-23 海顿直线电机(常州)有限公司 A kind of new spigot nut
CN207945258U (en) * 2018-01-22 2018-10-09 朗利维（北京）科技有限公司 Main pinch roller transmission backlass mechanism under elimination
CN108194615A (en) * 2018-03-09 2018-06-22 陕西理工大学 A kind of precision worm couple disappears gap method
CN108494157A (en) * 2018-05-13 2018-09-04 陕西理工大学 A kind of helix extrusion device that alternating-current permanent-magnet servo motor directly drives
CN209725135U (en) * 2019-04-11 2019-12-03 陕西理工大学 A kind of modular nut backlash eliminating equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022142957A1 (en) * 2020-12-28 2022-07-07 深圳市纵维立方科技有限公司 Transmission assembly and three-dimensional printing device

Also Published As

Publication number Publication date
CN109838526A (en) 2019-06-04
NL2024548B1 (en) 2021-10-04

Similar Documents

Publication Publication Date Title
NL2024548B1 (en) Micro Clearance Eliminating Device of Screw Rod-and-Nut Pair
CN1514454A (en) Operating mechanism for high voltage circuit breaker
CN106246639B (en) A kind of drive cylinder contiguous block assembly apparatus
CN209892708U (en) Double-nut elastic gap eliminating device of screw-nut pair
CN213614543U (en) Reaming equipment for spring bolt processing on high-voltage power supply
CN1429690A (en) Hydraulic operating torque wrench
CN209725135U (en) A kind of modular nut backlash eliminating equipment
LU501933B1 (en) Adaptively adjustable electric wrench
CN201455882U (en) Stud installer
CN203421094U (en) Adjusting mechanism of brake adjusting arm
CN219754938U (en) Hydraulic cylinder with adjustable piston rod length
CN210141265U (en) Can eliminate fluting hexagonal transmission shaft structure in transmission clearance
CN101947762B (en) Assistive device for dismounting driven belt pulley of continuously variable transmission engine
JPH03133643A (en) Device for elastically deforming printing plate set on plate cylinder
CN213016617U (en) Guide vane transmission mechanism of water turbine
KR20030065091A (en) Electirc actuator with sensor and electric break that operated upon mathord of expantion itself
CN112065877B (en) Clutch convenient for adjusting working clearance and implementation method thereof
CN221257329U (en) Double-assembly wedge-shaped locking mechanism
CN219865813U (en) Pressure-adjustable slotted screw
CN216842890U (en) One-way torque-changing rotary damper
CN217413260U (en) Pneumatic pressing device
CN220288558U (en) Rebound type position sensor
CN209335059U (en) A kind of unidirectional press fitting sealed steel ball disassembling fixture
CN220622414U (en) Adjustable bolt for automobile accessory
CN220945142U (en) Novel electric spanner sleeve

Legal Events

Date Code Title Description
MM Lapsed because of non-payment of the annual fee

Effective date: 20230101