CN201065893Y

CN201065893Y - Diaphragm coupling with freedom

Info

Publication number: CN201065893Y
Application number: CNU2007200055546U
Authority: CN
Inventors: 凯西·考互斯基
Original assignee: HAYDON LINEAR (CHANGZHOU) CO Ltd
Current assignee: HAYDON LINEAR (CHANGZHOU) CO Ltd
Priority date: 2007-03-09
Filing date: 2007-03-09
Publication date: 2008-05-28
Anticipated expiration: 2017-03-09

Abstract

The utility model provides a diaphragm shaft coupling with certain degrees of freedom, comprising a diaphragm, wherein, the diaphragm is provided with a spherical central part; one face of the spherical central part is matched with the face on the cover plate, and the shape of the two faces are same; the other face of the spherical central part is matched with the face on the driving plate, and the shape of the two faces are same; the cover plate and the driving plate are in matching connection; no gap exists between the spherical central part and the matching face of the driving plate and between the spherical central part and the matching face of the cover plate. The utility model has the advantages of bearing high-axial load, allowing micro angular misalignment, enabling bidirectional axial rigidity, keeping a common center line of shaft, enabling to transmit torque and enjoying simple mechanical processing.

Description

A kind of diaphragm coupling that degrees of freedom is arranged

Technical field

The utility model relates to a kind of coupling that connects electric rotating machine and screw rod.

Background technique

In order to make electric rotating machine produce straight line motion, need to adopt a screw rod usually, this screw rod rotation is converted into straight line motion by the nut that matches.The assembling prior art of screw rod and motor has following several mode.

A kind of method is to adopt whole thread spindle.Motor 20 as shown in Figure 1 and whole thread spindle 22 thereof.This mode is useful in the relatively short occasion of movement travel.Thread spindle is oversize, and inconvenience is made usually, and a major axis can increase cost.In addition, also inconvenience packing and transportation.

Another kind method is to adopt rigid coupling.This method can be simplified the making of axle, and can increase thread spindle length.At long thread spindle, its end can install a bearing additional as support.Rigid coupling 30 is connected between the rotating shaft 32 and screw rod 22 of motor 20 as shown in Figure 2, as shown in Figure 3, on structure shown in Figure 2, adds a block bearing 40 again at the far-end of screw rod 22.This structure produces a problem: because the rigidity characteristic of structure needs the alignment precision of motor and terminal bearing very high.Because the tolerance of component processing wants retainer shaft to be difficult to aiming at of motor.Unless precision is very high when making, otherwise this structure has certain limitation, also have shortcomings such as the aligning of being difficult for and the inefficacy of workpiece fatiguability.

Also having a kind of method is to adopt flexible coupling.As shown in Figure 4, flexible coupling 50 is connected between the rotating shaft 32 and screw rod 22 of motor 20, at far away, the near-end of screw rod block bearing 40 and 52 is arranged respectively.This mode is commonly used to eliminate the problem that is difficult for calibration.This class coupling allows the angle misalignment, but because the axial stiffness of this design is not enough, possibly can't keep motor and thread spindle centrally aligned.Therefore, also need to install additional a spring bearing.

Some design method, as adopt a universal joint, axial stiffness can be increased and a common shaft centre line can be kept.But it is inapplicable in the occasion that axial load is very high.Mechanical realization is complicated too.

Summary of the invention

The utility model provides a kind of diaphragm coupling that degrees of freedom is arranged, its purpose solves the shortcoming that prior art exists, a kind of high axial load of bearing is provided, can allow micro-angular misalignment, can reach two-way axial stiffness again, can also keep a common shaft centre line, while energy transfer of torque, the simple coupling of machining.

The technological scheme that its technical problem that solves the utility model adopts is:

A kind of diaphragm coupling that degrees of freedom is arranged is characterized in that: have a diaphragm; Diaphragm has the core of a sphere; Spherical core has face identical shaped on a face and the cover plate to cooperate; Face identical shaped on spherical another face of core and the driving plate cooperates; Cover plate cooperatively interacts with driving plate and connects, the fitting surface of spherical core of diaphragm and driving plate and and and the fitting surface of cover plate between do not have the gap.

Other has a diaphragm part and stretches out from the edge, outer ring of spherical core; Phrenic end is extended with projection; Projection extends to position and the loose fit with it that shape matches with it on the driving plate.

Above-mentioned driving plate and machine shaft are fixedly connected.

The near-end of above-mentioned spherical center portion and screw rod is fixedly connected.

Above-mentioned diaphragm portion is lower than cover plate and driving plate hardness.

The diaphragm part can be made up of spoke.

The usefulness of technique scheme is: diaphragm and cover plate, the combination of three rigid members of driving plate has guaranteed bi-directional axial rigidity (" axial stiffness " refers to axial displacement and be about 25 microns under load condition), with common shaft centre line and high axial load, thereby cover plate is connected effectively transfer of torque with driving plate, diaphragm and cover plate, driving plate has the ball fitting surface respectively, therefore this coupling has level of freedom, can allow micro-angular misalignment (angle that " micro-angular misalignment " refers to is about monolateral 2.5 degree or bilateral 5 degree) the utility model part few, processing is simple.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the motor side view that prior art adopts whole thread spindle;

Fig. 2 is that prior art adopts rigid coupling to connect the motor side view of motor shaft end and screw rod;

Fig. 3 is the prior art view that the other end of the screw rod of Fig. 2 has added a block bearing;

Fig. 4 is the prior art side view that adopts the motor of flexible coupling;

Fig. 5 is a fragmentary side cross-sectional view of the present utility model;

Fig. 6 is the blast side view of Fig. 5;

Fig. 7 is that the screw rod of diaphragm such as looks closely at axis side view among Fig. 5;

Fig. 8 is that the motor of diaphragm such as looks closely at axis side view among Fig. 5;

Fig. 9 is the axis side views such as blast of Fig. 5, has increased screw rod and motor shaft;

Figure 10 is the axis side view that waits after part assembles among Fig. 9;

Figure 11 is a diaphragm coupling of the present utility model and the axis side view that waits after motor connects;

Figure 12～15th, can be used for substituting diaphragm structure in the utility model other embodiment wait axis side view.

Embodiment

Figure 5 shows that the embodiment 1 of this model utility, diaphragm coupling, the diagram number is 100.Be connected between the rotating shaft 32 and screw rod 22 of motor 20.Diaphragm coupling 100 includes a diaphragm 110, is connected in the near-end of screw rod 22.This diaphragm 110 can be made by any suitable plastics or metal, as long as this material wear-resistant.But plastic materials can be preferably, and hardness is probably in Shao Shi D 50-90 scope.Relative rotary motion between diaphragm 110 and the screw rod 22 is limited by structure shown in Figure 5: the inner chamber of diaphragm 110 is a Hexagon, matches with the Hexagon of screw rod 22 outsides.Other can limit the shape that rotatablely moves and can use equally.Diaphragm 110 is fixed in the near-end of screw rod 22 by C shape back-up ring 120, and C shape back-up ring 120 is connected between diaphragm 110 and the screw rod 22 terminal flanges 122 that are shaped.

Diaphragm 110 is formed with two

spherical shoulders

130 and 134, and the same shape in shoulder 130 and the cover plate 132 matches, and shoulder 134 matches with driving plate 136.As shown in Figure 5, driving plate 136 is anchored on the axle 32 by screw 140.Also can so just itself and axle 32 can be welded with making driving plate 136 with axle 32 materials similar.Cover plate 132 connects with driving plate 136 by screw thread 150, make the fitting surface of the shoulder 134 of elimination diaphragm 110 spherical cores and driving plate 136 and shoulder 130 and and the fitting surface of cover plate 132 between do not have the gap.

There is a mould barrier film 160 diaphragm 110 inside, at the end of diaphragm 110, are formed with four projections 170 (visual 2 of Fig. 5), and similar shape place pine is equipped with the micro-angular misalignment between adjusting screw rod 22 and the axle 32 in projection 170 and the driving plate 136.Certainly, it all is feasible being provided with greater or less than 4 projections 170.

Diaphragm 110 is preferably injection molded by soft plastic, and rigidity depends on physical dimension and amount of deflection

requirement.Cover plate

132 and 136 can be by making than diaphragm 110 hard materials, as metallic material.

Figure 6 shows that the explosive view of diaphragm coupling 100, shown each parts of forming diaphragm coupling 100;

Fig. 7 is that the screw rod 22 of diaphragm 110 such as looks closely at axis side view;

Fig. 8 is that the motor shaft 32 of diaphragm 110 such as looks closely at axis side view, can see all projections 170 simultaneously;

Fig. 9 is axis side view and screw rod 22 that connects with it and axles 32 such as the blast of diaphragm coupling 100;

Figure 10 is the axis side view that waits after part assembles among Fig. 9;

Figure 11 be diaphragm coupling 100 with after motor 20 and screw rod 22 connect etc. axis side view;

Figure 12 shows that the utility model embodiment 2.Diaphragm coupling 180 includes spherical core 190 and the mould barrier film 192 that is molded into together, is made by elastic material.What be formed in mould barrier film 192 the other ends is the object 200 of absolute rigidity, is formed by plastic injection-moulded, and it includes four projections 202.

Figure 13 shows that the utility model embodiment 3.Diaphragm coupling 220 includes spherical core 230, and spherical core 230 injection moldeds are on thin type metalwork 232, and the mould barrier film is made up of four spokes 234.Outer eight flanks 240 (two of each openings) that are with of metalwork 232 are with transmitting torque.

Figure 14 shows that the utility model embodiment 4.Diaphragm coupling 250 includes spherical core 260 that is formed by plastics and the mould barrier film of being made up of plastics spoke 262, and plastics spoke 262 is formed in spherical core 260, to increase elasticity.Harder part 270 is formed in the periphery of plastics spoke 262, and it includes four projections 272.

Figure 15 shows that the utility model embodiment 5, this is a kind of coupling of metal diaphragm completely.The diaphragm that the metal diaphragm coupling includes spherical core 290 and is made up of spoke 292, and the outer ring part 294 of four projections 296 is arranged.Diaphragm coupling 280 outsides can spray plastics.

Among the above embodiment, when the mould barrier film was made by elastic material, its hardness range was about Shao Shi A 60-100.When the mould barrier film was made by metallic material, its thickness had high elasticity less than 1.5 millimeters, resembled the spring steel or stainless steel, and its hardness is about HRC30-50.Some nonferrous materialss as beryllium copper, can be used equally, but be subjected to price limit usually.Some flexible materials as aluminium or some Cuprum alloys, then are not suitable for being used.

Claims

1. the diaphragm coupling that degrees of freedom is arranged is characterized in that: have a diaphragm; Diaphragm has the core of a sphere; Spherical core has face identical shaped on a face and the cover plate to cooperate; Face identical shaped on spherical another face of core and the driving plate cooperates; Cover plate cooperatively interacts with driving plate and connects, the fitting surface of spherical core of diaphragm and driving plate and and and the fitting surface of cover plate between do not have the gap.

2. a kind of diaphragm coupling that degrees of freedom is arranged as claimed in claim 1 is characterized in that: have a diaphragm part and stretch out from the edge, outer ring of spherical core; Phrenic end is extended with projection; Projection extends to position and the loose fit with it that shape matches with it on the driving plate.

3. a kind of diaphragm coupling that degrees of freedom is arranged as claimed in claim 1, it is characterized in that: driving plate and machine shaft are fixedly connected.

4. a kind of diaphragm coupling that degrees of freedom is arranged as claimed in claim 1, it is characterized in that: the near-end of spherical center portion and screw rod is fixedly connected.

5. a kind of diaphragm coupling that degrees of freedom is arranged as claimed in claim 1 is characterized in that: diaphragm portion is lower than cover plate and driving plate hardness.

6. a kind of diaphragm coupling that degrees of freedom is arranged as claimed in claim 2 is characterized in that: the diaphragm part is made up of spoke.