CN101328936B - Large load gapless accurate hooke hinge - Google Patents
Large load gapless accurate hooke hinge Download PDFInfo
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- CN101328936B CN101328936B CN2008101159734A CN200810115973A CN101328936B CN 101328936 B CN101328936 B CN 101328936B CN 2008101159734 A CN2008101159734 A CN 2008101159734A CN 200810115973 A CN200810115973 A CN 200810115973A CN 101328936 B CN101328936 B CN 101328936B
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Abstract
The aim of the invention is to provide a large-load gapless precise hook hinge. The hook hinge overcomes the disadvantages of a traditional two-DOF and three-DOF (degree of freedom) rotary hinge, that is, a hook hinge structure which is used in a six-DOF vibration isolation and positioning platform and adopts an angular contact bearing pretightening mode to remove the bearing clearance and achieve the effects of large bearing capacity and high precision. The hook hinge consists of four parts: an upper rotation body, an upper node fork, a cross axle component and a lower node fork. The upper rotation body and the upper node fork are movably connected together to form a first rotational degree of freedom. The upper node fork and the cross axle are movably connected together to form a second rotational degree of freedom. The cross axle and the lower node fork are movably connected together to form a third rotational degree of freedom. The large-load gapless precise hook hinge has the advantages of a compact structure, strong bearing capacity, high precision, a large rotational range of the hinge, long service time, convenient maintenance, etc. The large-load gapless precise hook hinge is suitable for the connection of other precise mechanisms besides a six-rod parallel positioning platform.
Description
(1) technical field:
The present invention relates to a kind of large load gapless accurate hooke hinge, refer in particular to a kind of large load gapless accurate hooke hinge that in six-degree-of-freedom vibration isolation locating platform, uses, belong to the precision optical machinery field.
(2) background technique:
Six-degree-of-freedom vibration isolation locating platform is active vibration isolation and the accurate positioning device that is applied on precision optics scope and the laser aiming equipment.It comprises upper mounting plate, lower bolster, several parts such as device, two-freedom turning joint and Three Degree Of Freedom turning joint of stretching initiatively.Each device that initiatively stretches links to each other with upper mounting plate by a binary turning joint, links to each other with lower bolster by a Three Degree Of Freedom turning joint.By initiatively the stretch fore and aft motion of device of the six roots of sensation, upper mounting plate can be realized the motion of six-degree-of-freedom, and the vibration that realizes six-degree-of-freedom is isolated and accurate locating function.
The two-freedom turning joint and the Three Degree Of Freedom turning joint that use in the locating platform of six-degree-of-freedom vibration isolation in the past use ball pivot usually, but, assembling difficulty big because of the ball pivot difficulty of processing, surface friction drag is big and be difficult to eliminate hinge gap under the big load, thereby influenced Location accuracy, vibration isolating effect and the bearing capacity of six-degree-of-freedom vibration isolation locating platform, therefore suddenly waited to improve.
(3) summary of the invention:
The object of the present invention is to provide a kind of large load gapless accurate hooke hinge, the traditional two-freedom of six-degree-of-freedom vibration isolation locating platform use and the drawback of Three Degree Of Freedom turning joint-Hooke's hinge structure have been overcome, and adopt the method for angular contact bearing pretension to eliminate the bearing play, reach the effect that bearing capacity is big, precision is high.
A kind of large load gapless accurate hooke hinge of the present invention by on turn (1) last joint fork (2), cross axle assembly (3) and joint fork (4) four parts composition down.This four part from top to bottom is movably connected by bearing each other, forms three independent rotation degrees of freedom.
Turn (1) on described by rotating disk (5), last pretension screw (6), pre-load nut (7), pretension lid (8), on the angular contact bearing (9) of turning, bearing shim (10) is formed.Wherein, as Fig. 1, Fig. 3, shown in Figure 6, upper half part of rotating disk (5) is cylindric, and its upper end is provided with a cross recess, and the upper end of rotating disk forms four fan-shaped boss that shape is identical thus, respectively is provided with a screw mounting hole on each fan-shaped boss; Lower half portion of rotating disk (5) is inverted round table-like, and the external diameter of round platform is less than the external diameter of upper half part cylinder; The inside of rotating disk (5) is the second order mounting hole that a radius from top to bottom reduces successively, be respectively applied for pretension lid (8) is installed, on turn angular contact bearing (9) and bearing shim (10).Pretension lid (8) has the blind flange structure of through hole for the center, the hollow circuit cylinder platform of protrusion is arranged at the blind flange bottom, have four screw counter bores to be used to install pretension screw (6) around the blind flange, the hollow circuit cylinder platform of bottom is used to compress the housing of angular contact bearing (9) of turning, to eliminate the gap.
When in assembling, turning (1) connected element, as shown in Figure 3, turn in the mounting hole of rotating disk (5), packing into successively angular contact bearing (9) and bearing shim (10), bearing shim (10) is positioned at turns on two between (1) angular contact bearing (9).By tightening pretension screw (6) pretension lid (8) is applied pretightening force again, can make angular contact bearing (9) housing of turning on two close mutually, thereby eliminate hinge gap, realize the smooth motion of no gap.
The described joint of going up is pitched (2) by last free bearing (11), free bearing end cap (1 3), and following pretension screw (15) is formed.Wherein, shown in Figure 5 as Fig. 2, lower half portion of last free bearing (11) is the groove of a semi-surrounding formula, and the both sides of groove are provided with the coaxial mounting hole of symmetry, and the top of groove is provided with a projecting shaft, and screw thread has been attacked in the upper end part of projecting shaft.Free bearing end cap (13) is a flange plate structure, there is the hollow circuit cylinder boss at the center, three through holes are arranged on the flange plate, be used to install down pretension screw (15), behind the following pretension screw (15) of tightening free bearing (11) both sides, the hollow circuit cylinder boss props up the housing of cross axle angular contact bearing (14), makes the both sides housing close mutually, realizes the elimination of bearing play.
As shown in Figure 3, turn on being (1) and last joint fork (2) in the large load gapless accurate hooke hinge top, the projecting shaft of going up free bearing (11) in the last joint fork (2) with on turn (1) on angular contact bearing (9) inner ring of turning cooperate, and use pre-load nut (7) to interfix, form first rotational freedom.
Described cross axle assembly (3) is made up of cross axle (12) and cross axle angular contact bearing (14).Cross axle (12) structure as shown in Figure 7, by the decussate texture that four ladder cylinders are formed, each cylinder all matches with a cross axle angular contact bearing (14) endoporus.
Described joint is down pitched (4) by free bearing end cap (13), following pretension screw (15), and following free bearing (16) is formed.Wherein, shown in Figure 3 as Fig. 1, following free bearing (16) is the groove structure of a semi-surrounding formula, and the both sides of groove are provided with the coaxial mounting hole of symmetry, and the both sides of groove and bottom also are provided with the lightening core of queueing discipline in addition.
As shown in Figure 5, the top of cross axle assembly (3) is last joint fork (2), a cross axle angular contact bearing (14) respectively is equipped with at cross axle (12) four sides in the cross axle assembly (3), incites somebody to action in the bearing mounting hole of free bearing (11) on wherein a pair of angular contact bearing (14) is packed into.The following pretension screw (15) of pretension both sides, free bearing end cap (13) is inwardly exerted pressure, the housing of a pair of angular contact bearing (14) is compressed, eliminate the bearing play, realize the highi degree of accuracy transmission of second degrees of freedom, as shown in Figure 3, fork (4) is saved under being in the bottom of cross axle assembly (3), saves under uninstalled a pair of cross axle angular contact bearing (14) is packed in the cross axle assembly (3) in the bearing mounting hole of free bearing (16) under pitching in (4).The following pretension screw (15) of pretension both sides is inwardly exerted pressure free bearing end cap (13), and the housing of a pair of angular contact bearing (14) is compressed, and realizes the no gap transmission of the 3rd rotational freedom.
Each constituent elements of a kind of large load gapless accurate hooke hinge of the present invention is simple in structure, does not need special processing, just can realize under the common process condition; Its rotating part adopts bearings, and can arrange in pairs or groups flexibly as required in use bearing and annex thereof are to satisfy various different demands.For example: use high-grade bearing that the precision of Hooke's hinge is further improved, the bearing of employing large bearing capacity then can further improve the bearing capacity of Hooke's hinge; Therefore, the present invention has compact structure, and bearing capacity is strong, the precision height, and the hinge through scope is big, long service life, advantage such as easy to maintenance.Except being applicable to six bars locating platform in parallel, the present invention also is applicable to the connection of the mechanism that other is accurate.
(4) description of drawings:
Fig. 1 is the axonometric drawing that waits of a kind of large load gapless accurate hooke hinge of the present invention;
Fig. 2 is the plan view of a kind of large load gapless accurate hooke hinge of the present invention;
Fig. 3 is the A-A sectional view of Fig. 2;
Fig. 4 is the side view of a kind of large load gapless accurate hooke hinge of the present invention;
Fig. 5 is the B-B sectional view of Fig. 4;
Fig. 6 is the top view of a kind of large load gapless accurate hooke hinge of the present invention;
Fig. 7 is the cross axle in a kind of large load gapless accurate hooke hinge of the present invention.
Number in the figure is described as follows:
1, turns 2, go up the joint fork, 3, the cross axle assembly on, 4, following joint fork, 5, rotating disk, 6, go up the pretension screw, 7, pre-load nut, 8, pretension lid, 9, on the angular contact bearing of turning, 10, bearing shim, 11, go up free bearing, 12, cross axle, 13, free bearing end cap, 14, cross axle angular contact bearing, 15, following pretension screw, 16, free bearing down
(5) embodiment:
Below in conjunction with drawings and embodiments invention is described in further detail.
A kind of large load gapless accurate hooke hinge of the present invention by on turn 1, last joint fork 2, cross axle assembly 3 and down joint fork 4 four parts form.This four part from top to bottom is movably connected by bearing each other, forms three independent rotation degrees of freedom.
Turn 1 on described by rotating disk 5, last pretension screw 6, pre-load nut 7, pretension lid 8, on the angular contact bearing 9 of turning, bearing shim 10 is formed.Wherein, as Fig. 1, Fig. 3, shown in Figure 6, upper half part of rotating disk 5 is cylindric, and its upper end is provided with a cross recess, and the upper end of rotating disk forms four fan-shaped boss that shape is identical thus, respectively is provided with a screw mounting hole on each fan-shaped boss; Lower half portion of rotating disk 5 is inverted round table-like, and the external diameter of round platform is less than the external diameter of upper half part cylinder; The inside of rotating disk 5 is the second order mounting hole that a radius from top to bottom reduces successively, be respectively applied for pretension lid 8 is installed, on turn angular contact bearing 9 and bearing shim 10.Pretension lid 8 has the blind flange structure of through hole for the center, the hollow circuit cylinder platform of protrusion is arranged at the blind flange bottom, have four screw counter bores to be used to install pretension screw 6 around the blind flange, the hollow circuit cylinder platform of bottom is used to compress the housing of angular contact bearing 9 of turning, to eliminate the gap.
When in assembling, turning 1 connected element, as shown in Figure 3, turn in the mounting hole of rotating disk 5, packing into successively angular contact bearing 9 and bearing shim 10, bearing shim 10 is being turned on two between 1 angular contact bearing 9.Apply pretightening force by tightening 6 pairs of pretension lids 8 of pretension screw again, can make angular contact bearing 9 housings of turning on two close mutually, thereby eliminate hinge gap, realize the smooth motion of no gap.
The described joint of going up pitches 2 by last free bearing 11, free bearing end cap 13, and following pretension screw 15 is formed.Wherein, shown in Figure 5 as Fig. 2, lower half portion of last free bearing 11 is the groove of a semi-surrounding formula, and the both sides of groove are provided with the coaxial mounting hole of symmetry, and the top of groove is provided with a projecting shaft, and screw thread has been attacked in the upper end part of projecting shaft.Free bearing end cap 13 is a flange plate structure, there is the hollow circuit cylinder boss at the center, three through holes are arranged on the flange plate, be used to install down pretension screw 15, behind the following pretension screw 15 of tightening free bearing 11 both sides, the hollow circuit cylinder boss props up the housing of cross axle angular contact bearing 14, makes the both sides housing close mutually, realizes the elimination of bearing play.
As shown in Figure 3, the large load gapless accurate hooke hinge top turns 1 and last joint fork 2 on being, the projecting shaft of going up free bearing 11 in the last joint fork 2 with on turn 1 on angular contact bearing 9 inner rings of turning cooperate, and use pre-load nut 7 interfixes, and forms first rotational freedom.
Described cross axle assembly 3 is made up of cross axle 12 and cross axle angular contact bearing 14.Cross axle 12 structures as shown in Figure 7, by the decussate texture that four ladder cylinders are formed, each cylinder all matches with cross axle angular contact bearing 14 endoporus.
Described joint down pitches 4 by free bearing end cap 13, following pretension screw 15, and following free bearing 16 is formed.Wherein, shown in Figure 3 as Fig. 1, following free bearing 16 is the groove structure of a semi-surrounding formula, and the both sides of groove are provided with the coaxial mounting hole of symmetry, and the both sides of groove and bottom also are provided with the lightening core of queueing discipline in addition.
As shown in Figure 5, the top of cross axle assembly 3 is last joint fork 2, and a cross axle angular contact bearing 14 respectively is equipped with at cross axle 12 four sides in the cross axle assembly 3, in the bearing mounting hole with free bearing 11 on wherein a pair of angular contact bearing 14 is packed into.The following pretension screw 15 of pretension both sides, free bearing end cap 13 is inwardly exerted pressure, the housing of a pair of angular contact bearing 14 is compressed, eliminate the bearing play, realize the highi degree of accuracy transmission of second degrees of freedom, as shown in Figure 3, fork 4 is saved under being in the bottom of cross axle assembly 3, saves under uninstalled a pair of cross axle angular contact bearing 14 is packed in the cross axle assembly 3 in the bearing mounting hole of free bearing 16 under pitching in 4.The following pretension screw 15 of pretension both sides is inwardly exerted pressure free bearing end cap 13, and the housing of a pair of angular contact bearing 14 is compressed, and realizes the no gap transmission of the 3rd rotational freedom.
The assembly process of present embodiment is, earlier in the bearing hole with free bearing 16 under cross axle 12 insertions, pack the bearing hole of down free bearing 16 from the outside cross axle angular contact bearing 14 again and the inner ring of cross axle angular contact bearing 14 is cooperated with cross axle 12 closely, and use free bearing end cap 13 is fixed and pretension with following pretension screw 15; With identical method fit on free bearing 11 and cross axle 12; To turn angular contact bearing 9 and be clipped between the two bearing shim 10 and pack in the bearing hole of rotating disk 5 in a pair of face-to-face installation, and use go up pretension screw 6 and pretension lid 8 will on turn contact bearing 9 and bearing shim 10 pretensions fix; The projecting shaft of last free bearing 11 is inserted the inner ring of the angular contact bearing 9 of turning, and use pre-load nut 7 to fix, finish assembling.
Wherein, present embodiment use on turn contact bearing 9 and cross axle angular contact bearing 14 belong to big wrapping angle angular contact bearing, wrapping angle is 40 degree, is produced by Japanese NSK company, has higher precision and bearing capacity preferably.On the model that angular contact bearing 9 adopts of turning be 7202B, the model that cross axle angular contact bearing 14 adopts is 7200B.
Wherein, the material that rotating disk 5 uses is duralumin, hard alumin ium alloy, and the employed material of all the other component is steel.In order to guarantee the part quality of fit, last free bearing 11 and following free bearing 16 use the line cutting to process.Surperficial anodic oxidation is adopted in the surface treatment of aluminum duralumin, hard alumin ium alloy parts, and the process of surface treatment that steel adopts is chromium plating.
Claims (1)
1. large load gapless accurate hooke hinge is characterized in that: it by on turn (1) last joint fork (2), cross axle assembly (3) and joint fork (4) four parts composition down; This four part from top to bottom is movably connected by bearing each other, forms three independent rotation degrees of freedom;
Turn (1) on described by rotating disk (5), last pretension screw (6), pre-load nut (7), pretension lid (8), on the angular contact bearing (9) of turning, bearing shim (10) is formed; Upper half part of this rotating disk (5) is cylindric, and its upper end is provided with a cross recess, and the upper end of rotating disk forms four fan-shaped boss that shape is identical thus, respectively is provided with a screw mounting hole on each fan-shaped boss; Lower half portion of rotating disk (5) is inverted round table-like, and the external diameter of round platform is less than the external diameter of upper half part cylinder; The inside of rotating disk (5) is the second order mounting hole that a radius from top to bottom reduces successively, be respectively applied for pretension lid (8) is installed, on turn angular contact bearing (9) and bearing shim (10); Pretension lid (8) has the blind flange structure of through hole for the center, the hollow circuit cylinder platform of protrusion is arranged at the blind flange bottom, have four screw counter bores to be used to install pretension screw (6) around the blind flange, the hollow circuit cylinder platform of bottom is used to compress the housing of angular contact bearing (9) of turning, to eliminate the gap;
When turning (1) connected element in assembling, turn on packing into successively in the mounting hole of rotating disk (5) angular contact bearing (9) and bearing shim (10), bearing shim (10) are positioned at turns on two between (1) angular contact bearing (9); By tightening pretension screw (6) pretension lid (8) is applied pretightening force again, can make angular contact bearing (9) housing of turning on two close mutually, thereby eliminate hinge gap, realize the smooth motion of no gap;
The described joint of going up is pitched (2) by last free bearing (11), free bearing end cap (13), and following pretension screw (15) is formed; Wherein, lower half portion of last free bearing (11) is the groove of a semi-surrounding formula, and the both sides of groove are provided with the coaxial bearing mounting hole of symmetry, and the top of groove is provided with a projecting shaft, and screw thread has been attacked in the upper end part of projecting shaft; Free bearing end cap (13) is a flange plate structure, there is the hollow circuit cylinder boss at the center, three through holes are arranged on the flange plate, be used to install down pretension screw (15), behind the following pretension screw (15) of tightening free bearing (11) both sides, the hollow circuit cylinder boss props up the housing of cross axle angular contact bearing (14), makes the both sides housing close mutually, realizes the elimination of bearing play;
Turn on being (1) and last joint fork (2) in the large load gapless accurate hooke hinge top, the projecting shaft of going up free bearing (11) in the last joint fork (2) with on turn (1) on angular contact bearing (9) inner ring of turning cooperate, and use pre-load nut (7) to interfix, form first rotational freedom;
Described cross axle assembly (3) is made up of cross axle (12) and cross axle angular contact bearing (14); The decussate texture that cross axle (12) is made up of four ladder cylinders, each cylinder all match with a cross axle angular contact bearing (14) endoporus;
Described joint is down pitched (4) by free bearing end cap (13), following pretension screw (15), and following free bearing (16) is formed; Wherein, following free bearing (16) is the groove structure of a semi-surrounding formula, and the both sides of groove are provided with the coaxial bearing mounting hole of symmetry, and the both sides of groove and bottom also are provided with the lightening core of queueing discipline in addition;
The top of cross axle assembly (3) is last joint fork (2), and a cross axle angular contact bearing (14) respectively is equipped with at cross axle (12) four sides in the cross axle assembly (3), incites somebody to action in the bearing mounting hole of free bearing (11) on wherein a pair of angular contact bearing (14) is packed into; The following pretension screw (15) of pretension both sides, free bearing end cap (13) is inwardly exerted pressure, the housing of a pair of angular contact bearing (14) is compressed, eliminate the bearing play, realize the highi degree of accuracy transmission of second degrees of freedom, fork (4) is saved under being in the bottom of cross axle assembly (3), saves under uninstalled a pair of cross axle angular contact bearing (14) is packed in the cross axle assembly (3) in the bearing mounting hole of free bearing (16) under pitching in (4); The following pretension screw (15) of pretension both sides is inwardly exerted pressure free bearing end cap (13), and the housing of a pair of angular contact bearing (14) is compressed, and realizes the no gap transmission of the 3rd rotational freedom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101159734A CN101328936B (en) | 2008-07-01 | 2008-07-01 | Large load gapless accurate hooke hinge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101159734A CN101328936B (en) | 2008-07-01 | 2008-07-01 | Large load gapless accurate hooke hinge |
Publications (2)
| Publication Number | Publication Date |
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| CN101328936A CN101328936A (en) | 2008-12-24 |
| CN101328936B true CN101328936B (en) | 2010-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101159734A Expired - Fee Related CN101328936B (en) | 2008-07-01 | 2008-07-01 | Large load gapless accurate hooke hinge |
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| CN (1) | CN101328936B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102518689A (en) * | 2011-12-29 | 2012-06-27 | 江苏大学 | High-precision spherical hinge structure for parallel machine tools |
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| CN111577779A (en) * | 2020-05-20 | 2020-08-25 | 九江精密测试技术研究所 | Heavy-load precise Hooke hinge |
| CN114017438A (en) * | 2021-10-13 | 2022-02-08 | 宜昌长机科技有限责任公司 | Bearing assembly with spherical pair movement characteristics and combined installation method |
| CN116275946B (en) * | 2023-03-20 | 2023-10-27 | 至新自动化(北京)有限公司 | Hinge mechanism with zero clearance and quantitatively adjustable rigidity for six-degree-of-freedom parallel platform |
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| CN101328936A (en) | 2008-12-24 |
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