CN2594531Y - Movable rotary rigid shaft coupling - Google Patents

Abstract

The utility model discloses a movable rotary rigid shaft coupling, which is composed of two driving forks (or flange plates), four connecting pieces and a middle floating disc which pass through four radial bearings, four self-aligning bearings and eight driving pin shafts. After the positions of the left and the right driving forks are aligned on the shaft extension part, the axial positioning is carried out. The utility model can be used for the connection of the shaft extension parts of two components arranged on a coaxial line in a mechanical system, the connection of the two shaft extension parts with setover and (or) deflection angles and an output mechanism of a small teeth difference planetary reduction gear. When the utility model is arranged, the accuracy of the relative position of the two shaft extension parts is not required strictly, the arrangement deformation of constructional parts can not be generated even when a large error exists, and the utility model is a driving mechanism with single degree of freedom. The manufacturing errors of the constructional parts can not cause the arrangement deformation, the additional arrangement stress can not be generated, the additional power consumption is avoided, and the bearings near the shaft extension parts can not be damaged. The utility model is the shaft coupling with the strongest adaptability to the relative position of the shaft line used for connecting two shafts at present.

Description

Movable rotary rigid coupling

Technical field

The utility model relates to the axle of two coaxial lines that are used to be rigidly connected or the coupling of the diaxon of offset distance, angle of yaw, particularly a kind of movable rotary rigid coupling is arranged.

Background technique

In the engineering, existing coupling mainly contains rigid coupling and elastic coupling flexible coupling two big classes except the Hooks coupling universal coupling that allows the angle transmission.Fixed rigid coupling requires the strict centering of the rotational axis of coupled diaxon, otherwise can produce the additional erection stress that is difficult to determine, the coaxality drift that can not adapt to the variation of transmission system ambient temperature and operating temperature and cause is seldom adopted in important power transmission.The kind of fast coupling mainly contains slide block type, gear type, chain type and Shi Miteshi.The frictional loss of slide block type is big, and mechanical efficiency is low; The quality of intermediate slider is bigger, because the dynamic load that the diaxon offset distance causes is big, therefore the offset distance amount to diaxon has strict restriction, the complex structure of gear type coupling, manufacture cost and maintenance cost height; It is bigger that the contact condition of the gear teeth is influenced by the accuracy of alignment of diaxon, and intensity is difficult to accurate Calculation; The permission journal offset is little, also must carry out the cold conditions of transmission system and hot side-play amount allowable and calculate; Insufficient lubrication can cause the premature wear of the gear teeth and lost efficacy during motion.The chain type coupling is relatively poor to the compensation performance of journal offset, matching gap in the chain link influences the service behaviour of coupling, use less in the engineering, the Shi Miteshi coupling is the connection that is used for the two-parallel axis of big distance, its function is different with the general movable coupling of rigidity, and it can not be used for the occasion of the otional axis coincidence of diaxon.In Shi Miteshi coupling when motion,, eight revolute pairs on four kinematic links are all done 360 ° of revolutions, during the carrying operation frictional loss big, mechanical efficiency is low.Spring column pin formula coupling is to use very wide a kind of coupling in the engineering, and the accuracy of alignment to axis also has higher requirement usually.Under the certain condition of the compression stiffness of elasticity snare and elastic ring and seat interporal lacuna, even disregard a pore size distribution error effect, the bias of axis also is the strong nonlinearity causality for additional radial load.

Summary of the invention

The purpose of this utility model provides a kind of movable rotary rigid coupling, can realize connection and transmission between the two parts axle spares, also can be used for having connection and transmission between two shaft extensions of offset distance and/or angle of yaw.

The technical solution of the utility model is as follows:

It comprises; About two transmission forks, four connecting sheets, one I-shaped in the middle of floating disc, four radial bearings, four selfaligning bearings, eight gear pins; First and second driving pin of difference symmetry installation forms drive fit in two holes of Left Drive fork, symmetrical respectively third and fourth gear pin formation drive fit of installing in two holes of right transmission fork; The difference close-fitting is installed radial bearing and selfaligning bearing in the hole of four connecting sheets that shape and size are identical, one end of the installation radial bearing of four connecting sheets inserts respectively in the I-shaped middle floating disc, use four even distribution holes on four gear pins and the I-shaped middle floating disc hinged respectively, thereby make four connecting sheets and I-shaped middle floating disc constitute an assembly; First and second driving pin that Left Drive is stuck respectively from I-shaped in the middle of the left side of two connecting sheets having connected of floating disc pack into and form drive fit the endoporus of two selfaligning bearings, third and fourth driving pin on the right transmission fork forms from the endoporus of two selfaligning bearings is packed on the right side of two connecting sheets having connected with I-shaped centre floating disc into respectively and is slidingly matched; About the endoporus of two transmission forks cooperate with the shaft extension of coupled two parts respectively; After the installation, radial bearing and selfaligning bearing are the monospace state distribution.

Radial bearing and selfaligning bearing also can be in twos state distribution at interval.

The beneficial effect that the utlity model has is: it is a kind of single-degree-of-freedom driving mechanism.When two axial lines overlaps or be parallel, belong to single-freedom planar mechanism; When two axial lines intersected or be staggered, accessory had the single-degree-of-freedom spatial mechanism of isolated degree of freedom.Both can be used for the connection between the shaft extension of two parts that coaxial line in the mechanical system installs, also can be used for having offset distance and (or) connection between two shaft extensions of angle of yaw, also can be used as the output mechanism of planetary speed reducer with small tooth number difference.Relative positional accuracy to two shaft extensions during installation does not have strict demand, even have than mistake, can not produce the installation distortion of constitutional detail yet; Movable rotary rigid coupling is a kind of single-degree-of-freedom driving mechanism.Therefore the foozle of constitutional detail can not cause assembly deflections yet, just can not produce additional erection stress yet, thereby has avoided additional power loss, can not cause damage near the bearing the shaft extension yet.Movable rotary rigid coupling involved in the present invention is at present to the strongest a kind of coupling of adaptive capacity of the axis relative position of coupled diaxon.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the sectional view of another kind of structure.

Embodiment

As shown in Figure 1 and Figure 2, comprise about 7,8,9,10, one of 1,2, four connecting sheets of two transmission forks I-shaped in the middle of floating disc 23, four 15,16,17,18, eight gear pins 3,4,5,6,19,20,21,22 of 11,12,13,14, four selfaligning bearings of radial bearing; The difference symmetry is installed first and second driving pin 3,4 and is formed drive fits in two holes of Left Drive fork 1, and symmetrical respectively third and fourth gear pin 5,6 of installing forms drive fits in two holes of right transmission fork 2; The difference close-fitting is installed radial bearing 11,12,13,14 and selfaligning bearing 15,16,17,18 in the hole of four connecting sheets 7,8,9,10 that shape and size are identical, one end of the installation radial bearing of four connecting sheets inserts respectively in the I-shaped middle floating disc 23, use four even distribution holes on four gear pins 19,20,21,22 and the I-shaped middle floating disc hinged respectively, thereby make four connecting sheets and I-shaped middle floating disc constitute an assembly; First and second driving pin 3,4 on the Left Drive fork 1 respectively from I-shaped in the middle of the left side of two connecting sheets 7,8 of having connected of floating disc 23 pack into and form drive fit the endoporus of two selfaligning bearings 15,16, third and fourth driving pin 5,6 on the right transmission fork 2 forms from the endoporus of two selfaligning bearings 17,18 is packed on the right side of two connecting sheets 9,10 of having connected with I-shaped centre floating disc 23 into respectively and is slidingly matched; About the endoporus 24,25 of two transmission forks cooperate with the shaft extension of coupled two parts respectively; After the installation, radial bearing 11,12,13,14 and selfaligning bearing 15,16,17,18 are the monospace state distribution.

As shown in Figure 3, radial bearing 11,12,13,14 and selfaligning bearing 15,16,17,18 also can be in twos state distribution at interval.

Movable rotary rigid coupling is not only applicable to install the machine driven system of posterior axis fixed-site, is applicable to the distance of two axial lines when operation and the machine driven system that angle changes yet.When the dead in line of coupled diaxon, there is not relative movement between each member of mechanism, left and right sides transmission fork 1,2 turns round synchronously.When skew takes place for the axis of coupled diaxon, realize automatic adjusting, amplitude corresponding increase of swinging relatively with relative swing between the middle I-shaped floating disc 23 with the increase of axis offset distance by four connecting sheets 7,8,9,10.The mean speed of every turn over of left and right sides transmission fork 1,2 equates, and the transient speed difference with the increase of axis offset distance also and corresponding increase.By analysis, when the turning radius ratio of offset distance and transmission fork upper pin was 1%, corresponding instantaneous maximum (top) speed difference was 0.05%.When the axis of coupled diaxon deflected, four connecting sheets 7,8,9,10 rocked under the driving pin effect accordingly together with the I-shaped floating disc 23 in centre, to adapt to the transmission requirement under the axis tilt condition.When coupling is worked, the two connecting sheet tensions that the stress of connecting sheet is always relative and all the other two relative connecting sheet pressurizeds.

Relative position between four connecting sheets and the middle floating disc also can be made layout as shown in Figure 3, radial bearing 11,12,13,14 and selfaligning bearing 15,16,17,18 are in twos state distribution at interval, for this type of connecting mode, the stress of four connecting sheets 7,8,9,10 is not the just whole pressurizeds of whole tensions, decides with the gyratory directions of driving shaft.

Claims (3)

1. movable rotary rigid coupling is characterized in that it comprises: about two transmission forks (1,2), four connecting sheets (7,8,9,10), one I-shaped in the middle of floating disc (23), four radial bearings (11,12,13,14), four selfaligning bearings (15,16,17,18), eight gear pins (3,4,5,6,19,20,21,22); Difference symmetry first and second driving pin of installation (3,4) forms drive fit in two holes of Left Drive fork (1), symmetrical respectively third and fourth gear pin (5,6) formation drive fit of installing in two holes of right transmission fork (2); The difference close-fitting is installed radial bearing (11,12,13,14) and selfaligning bearing (15,16,17,18) in the hole of four connecting sheets (7,8,9,10) that shape and size are identical, one end of the installation radial bearing of four connecting sheets inserts respectively in the I-shaped middle floating disc (23), use four gear pins (19,20,21,22) hinged respectively, thereby make four connecting sheets and I-shaped middle floating disc constitute an assembly with four even distribution holes on the I-shaped middle floating disc; First and second driving pin (3,4) on the Left Drive fork (1) respectively from I-shaped in the middle of the left side of two connecting sheets (7,8) of having connected of floating disc (23) pack into and form drive fit the endoporus of two selfaligning bearings (15,16), third and fourth driving pin on the right transmission fork (2) (5,6) forms from the endoporus of two selfaligning bearings (17,18) is packed on the right side of two connecting sheets (9,10) of having connected with I-shaped centre floating disc (23) into respectively and is slidingly matched; About the endoporus (24,25) of two transmission forks cooperate with the shaft extension of coupled two parts respectively; After the installation, radial bearing (11,12,13,14) and selfaligning bearing (15,16,17,18) are the monospace state distribution, or radial bearing (11,12,13,14) and selfaligning bearing (15,16,17,18) are in twos state distribution at interval.

2. movable rotary rigid coupling according to claim 1 is characterized in that: said radial bearing (11,12,13,14) is deep groove ball bearing or roller bearing or needle bearing or sliding bearing.

3. movable rotary rigid coupling according to claim 1 is characterized in that: said selfaligning bearing (15,16,17,18) is selfaligning ball bearing or selfaligning roller bearing or sliding type spherical hinge.

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