ES2385452A1 - Nut for screws to balls. (Machine-translation by Google Translate, not legally binding) - Google Patents

Nut for screws to balls. (Machine-translation by Google Translate, not legally binding) Download PDF

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Publication number
ES2385452A1
ES2385452A1 ES201030973A ES201030973A ES2385452A1 ES 2385452 A1 ES2385452 A1 ES 2385452A1 ES 201030973 A ES201030973 A ES 201030973A ES 201030973 A ES201030973 A ES 201030973A ES 2385452 A1 ES2385452 A1 ES 2385452A1
Authority
ES
Spain
Prior art keywords
nut
circuits
balls
rolling
recirculation circuit
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.)
Granted
Application number
ES201030973A
Other languages
Spanish (es)
Other versions
ES2385452B1 (en
Inventor
José Francisco MUTILOA BERASALUCE
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.)
Zuazo S A
ZUAZO SA
Original Assignee
Zuazo S A
ZUAZO SA
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 Zuazo S A, ZUAZO SA filed Critical Zuazo S A
Priority to ES201030973A priority Critical patent/ES2385452B1/en
Publication of ES2385452A1 publication Critical patent/ES2385452A1/en
Application granted granted Critical
Publication of ES2385452B1 publication Critical patent/ES2385452B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/22Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2214Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating balls

Abstract

Ball screw nut, consisting of at least two rolling circuits (2) and a recirculation circuit (21) for balls machining all circuits (2), (21) inside the body (1) of the nut and in the same operation. Each two of said contiguous / proximate rolling circuits (2) are communicated with each other by a recirculation circuit (21) offset by a certain angle ({al}) with respect to them. recirculation (21) is mechanized inside the body (1) of the nut in perfect continuity with said rolling circuits (2), to which it intercommunicates, replacing any independent parts to recirculate the balls, thereby ensuring a Total precision for the entire interior path where the balls circulate (B), avoiding dead zones and in perfect continuity, without any additional part.

Description

NUT FOR BALL SPINNERS

Background of the invention.

5
Various solutions for internal recirculation of the balls in the nuts of the ball screws are known in the current state of the art.

1O
Ball recirculation solutions in ball screw nuts are described, among others, in files U0262355, U0262356, U0268901 (in an old technology) and in files ES1031811, ES2027881 and ES2051632 (in a more recent technology). All known internal recirculation solutions employ separate pieces to make the balls recirculate.

Description of the invention

fifteen
The object of the invention is included within this industrial sector. It refers to a nut for ball spindles that, unlike other known nuts for ball spindles, is internally recirculated and does not use independent parts to make the balls recirculate.

twenty
The ball screw nut, according to the invention, is characterized in that it consists of at least two rolling circuits and a ball recirculation circuit; All circuits are mechanized inside the nut body and in the same operation; each of said rolling circuits communicating with each other by a recirculation circuit, offsetting a certain angle (a) with respect to them; and said machined recirculation circuit going inside the nut body in continuity with said rolling circuits, to which it intercom replaces any independent part used to make the balls recirculate.

25
The aforementioned rolling and recirculation circuits are mechanized operation, so that there is perfect continuity between them. in the same

Each recirculation circuit, like the rolling circuits, adjusts dimensionally to the radius of the balls and has a slight opening for the passage of the mimes through said recirculation zone with the desired angle (a).

The structural advantages of the nut of the invention with respect to the known ones are notable; being able to stand out, among others, the perfect continuity between circuits, avoiding dead zones and without any additional independent piece to make the balls recirculate.

They stand out as additional advantages of the nut, according to the invention:

the simplification of the manufacturing process that involves eliminating any part independent of those currently used to make the balls recirculate;

the increase in the stiffness of the nut, by eliminating the weak areas that previously originated in the areas where said added independent pieces were placed;

the possibility of putting more circuits in shorter nut length;

the consequent increase in load capacity;

the recirculation circuit can have the desired shape and angles, (variables according to need);

greater precision in the recirculation circuits because they are manufactured at the same time as the rolling circuits, in perfect continuity with them.

Therefore, the content of the present application constitutes a new invention that involves inventive activity, and is susceptible of industrial application.

Description of the figures.

To better understand the object of the present invention, a preferred form of practical embodiment is shown in the drawings, susceptible to accessory changes that do not detract from its foundation.

Figure 1 is a general perspective view of the ball screw nut object of the invention, in which the internal rolling (2) and recirculation circuits (21) have been indicated.


Figure 2 is a general section corresponding to Figure 1 in which the rolling (2) and recirculation circuits (21) are represented, as well as the angle (a)

1 o


25

of this for a non-limiting example of embodiment, since said angle (a) is variable according to need.

Figure 3 is a front view corresponding to Figure 2, in which three recirculation circuits (21) for the balls (B) have been shown.

Figure 4 is a schematic representation similar to Figure 2 with several rolling circuits (2) and several recirculation circuits (21)

Description of a preferred embodiment.

An example of practical, non-limiting embodiment of the present invention is described below. Other embodiments in which accessory changes are introduced that do not distort its basis are not ruled out at all; on the contrary, the present invention also encompasses all its variants.

The nut for ball screws, according to the invention, consists of at least two rolling circuits (2) and at least one ball recirculation circuit

(21) that communicates with each other. The balls (B) circulate / move continuously in said circuits (2), (21).

In accordance with the invention, the nut body (1) carries said rolling (2) and recirculation circuits (21) machined, in the same operation, inside the body (1) of the nut which gives them a total continuity between them, in order to facilitate the movement of the balls (B) so that the nut body (1) lacks any independent part to make the balls recirculate and weakened areas and, additionally, between the rolling circuits (2) and each recirculation circuit (21) dead zones are eliminated.

The recirculation circuit (21), machined according to the invention, is offset by a certain angle (a) with respect to the rolling circuits (2) that intercommunicates. Said offset angle (a) may vary, depending on each specific need, for example depending on the proximity between rolling circuits (2) or depending on the number of existing rolling circuits (2), without thereby altering the essence of the invention.

According to the invention, each recirculation circuit (21) is dimensionally adjusted to the radius of the balls (B) and has a slight opening for their passage through said recirculation circuit (21) with the desired angle (a) .

It is basic, for the purposes of the invention, that the rolling (2) and recirculation circuits

(21) are mechanized in the same operation, so that there is perfect continuity between them to ensure perfect precision in the finishing and rolling of the spindle.

5 The materials, dimensions, proportions and, in general, those other accessory or secondary details that do not alter, change or modify the proposed essentiality may be variable.

The terms in which this report is written are true and faithful reflection of the object described, and should be taken in its broadest sense and never in a limiting way.

Claims (1)

  1. 5 1 O
    1.-Nut for ball screws; characterized in that it consists of at least two rolling circuits (2) and a recirculation circuit (21) for the machined balls all circuits (2), (21) inside the body (1) of the nut and in the same operation; a) each two of said adjacent / next rolling circuits (2) connected to each other by a recirculation circuit (21) offset by a certain angle (a) with respect to them; and b) said recirculation circuit (21) being machined inside the body (1) of the nut in perfect continuity with said rolling circuits (2), to which it intercom replaces any independent parts to make the balls recirculate; so that the internal return of the balls is done avoiding dead zones, in perfect continuity and without any additional pieces.
    fifteen
    2.-Nut for ball screws; according to claim 1, characterized in that the angle (a) of offset between each machined recirculation circuit (21) is variable for each specific nut, depending on the number of existing rolling circuits (2) and / or their proximity to each other.
    twenty
    3.-Nut for ball screws; according to claim 1, characterized in that each recirculation circuit (21) is dimensionally adjusted to the radius of the balls (B) and has a slight opening for passing them through said recirculation circuit (21) with the desired angle (a) .
    25
    4.Nut for ball screws; according to claim 1, characterized in that the rolling (2) and recirculation circuits (21) are machined in the same operation; so that there is perfect continuity between them.
ES201030973A 2010-06-23 2010-06-23 Nut for ball spinners. Active ES2385452B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES201030973A ES2385452B1 (en) 2010-06-23 2010-06-23 Nut for ball spinners.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201030973A ES2385452B1 (en) 2010-06-23 2010-06-23 Nut for ball spinners.

Publications (2)

Publication Number Publication Date
ES2385452A1 true ES2385452A1 (en) 2012-07-25
ES2385452B1 ES2385452B1 (en) 2013-06-04

Family

ID=46458641

Family Applications (1)

Application Number Title Priority Date Filing Date
ES201030973A Active ES2385452B1 (en) 2010-06-23 2010-06-23 Nut for ball spinners.

Country Status (1)

Country Link
ES (1) ES2385452B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040083840A1 (en) * 2002-11-04 2004-05-06 King David E. Integrated recirculation path in ball nut / ball screw
US20040103734A9 (en) * 2002-04-15 2004-06-03 John Drake Internal recirculating ball screw and nut assembly
EP1475554A1 (en) * 2003-05-06 2004-11-10 Umbra Cuscinetti S.p.A. Ball screw
US20060053919A1 (en) * 2004-08-27 2006-03-16 Delphi Technologies, Inc. Method for making a ball-nut and method for making a ball-screw
US20070209465A1 (en) * 2004-04-08 2007-09-13 Thk Co., Ltd. Screw Device And Method Of Manufacturing The Same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040103734A9 (en) * 2002-04-15 2004-06-03 John Drake Internal recirculating ball screw and nut assembly
US20040083840A1 (en) * 2002-11-04 2004-05-06 King David E. Integrated recirculation path in ball nut / ball screw
EP1475554A1 (en) * 2003-05-06 2004-11-10 Umbra Cuscinetti S.p.A. Ball screw
US20070209465A1 (en) * 2004-04-08 2007-09-13 Thk Co., Ltd. Screw Device And Method Of Manufacturing The Same
US20060053919A1 (en) * 2004-08-27 2006-03-16 Delphi Technologies, Inc. Method for making a ball-nut and method for making a ball-screw

Also Published As

Publication number Publication date
ES2385452B1 (en) 2013-06-04

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