CN2474798Y - Roller Coupling - Google Patents

Abstract

The roller coupling includes front outer disc, back outer disc, inner disc, rollers, baffle, locating pin, etc. and overcomes the demerits of other couplings, including poor radial, axial and angle compensating capacity, low efficiency, etc. and great wear of parts, including sliding block coupling, etc. the roller coupling has excellent power shaft connecting mechanism with powerful radial, axial and angular compensating capacity, strong damping capacity, convenient installation, high efficiency, less wear, long service life and low cost.

Description

Roller coupling

Roller coupling belongs to mechanical field.Be a kind of radially, axially, the angular compensatory ability is strong, damping capacity is strong, the new type power passing shaft coupling mechanism of complete in specifications, manufacturing is easy, easy for installation, cost is low, efficient is high, the life-span is long practicality.

Kind surplus the existing coupling 20 respectively has excellent, shortcoming.Advantage as box coupling, flange coupling is simple in structure, cheap, however its radially, axially and the angular compensatory ability too poor, be difficult for installing, and have a strong impact on the working life of bearing, bearing support and axle etc. in the running; Engagement toothed coupling, chain coupling, flat spring coupling, diaphragm coupling, universal coupling with spider, ball cage synchronous universal coupling, rubbercushioned sleeve bearing coupling etc. have certain radially, axially and the angular compensatory ability, yet its complex structure, cost is higher even too high.

Main task of the present utility model provide a kind of radially, axially, the angular compensatory ability is strong, damping capacity is strong, the new type power passing shaft coupling mechanism of complete in specifications, manufacturing is easy, easy for installation, cost is low, efficient is high, the life-span is long practicality.

For finishing above-mentioned task, technical solution of the present utility model is: Roller coupling, and mainly by preceding outer dish (1), back outer dish (2), inner disc (3), roller (4), baffle plate (5) and location pin formations such as (6).Its main feature is that preceding outer dish (1) is installed on power output (input) main shaft of power engine (working machine), the outer dish in back (2) is affixed with location pin (6) with preceding outer dish (1), inner disc (3) outside preceding, coil between (1) and the outer dish in back (2) by one group of axis and line shaft the approximately parallel roller of axis (4) with preceding outside coil (1) and after outside coil (2) and carry out transmission of power, inner disc (3) is installed on power input (output) main shaft of working machine (power engine), and (1) is coiled with restriction roller (4) in the outside of baffle plate (5) dish (2) outside the main axis direction is fixed in the back outside preceding, outer dish in back (2) and inner disc (3) go up in the circular hole the position and to preceding outer dish (1), the outer dish in back (2), inner disc (3), roller (4) etc. has the shielding of preventing dust of the position of rolling friction.

Second characteristic of Roller coupling be equipped with the parallel axes of one group of (three groups of correspondences) axis and line shaft and three groups of corresponding coaxality height (joining brill) on preceding outer dish (1), the outer dish in back (2), the inner disc (3), diameter (is respectively D ₁, D ₂, D ₃) be a bit larger tham outside roller (4) corresponding site that is contacted the footpath and (be respectively d ₁, d ₂, d ₃) unthreaded hole (11,21,31), and have

D ₁/ d ₁=D ₂/ d ₂=D ₃/ d ₃=c＞1, D ₁=D ₂And d ₁=d ₂Relation, roller (4) places in one group of three hole (11,21,31) of centering.A kind of special circumstances are

D ₁=D ₂=D ₃=D, d ₁=d ₂=d ₃=d and D＞d, D/d=c＞1.

The 3rd characteristics of Roller coupling are that the outer dish in back (2) is hollow cylindrical, have on its outer end disk one group with preceding outer dish (1), inner disc (3) upward corresponding, parallel, the diameter of corresponding circle hole with spindle hole be D ₂One group of unthreaded hole, its cylindrical side wall internal surface is the knuckle-tooth internal gear, the knuckle-tooth center is provided with one group of hole parallel with spindle hole that is used to be provided with clamping bolt and location pin, the number of teeth is with clamping bolt and locate the sum of pin and equate.

The 4th characteristics of Roller coupling be inner disc (3) outer rim for corresponding with the knuckle-tooth internal gear of outer dish (2), again the knuckle-tooth external gear in suitable gap is arranged mutually, establish in the gear teeth with the last corresponding one group of diameter of unthreaded hole of preceding outer dish (1), the outer dish in back (2) be D ₃Unthreaded hole.

The 5th characteristics of Roller coupling are that roller (4) is made with the stronger material of elasticity (as nylon) or the cylndrical surface skin lays thin one deck elastic material (as oil resistant rubber), and cylndrical surface cladding material segmentation contacts respectively with the preceding outer wall that coils the unthreaded hole (11,21,31) on (1), the outer dish in back (2), the inner disc (3).

The 6th characteristics of Roller coupling are that baffle plate (5) is made up of sheet metal (51) and ripple elastic plate (52), sheet metal (51) connects firmly the outer outer end of coiling (2) in the back, and the axle sleeve outer wall of ripple elastic plate (52) inner edge and inner disc (3) meets with spacing to roller (4) and to the shielding of preventing dust of the position of each rolling friction.

Its working principle is: the moment of torsion of driving shaft is delivered to the outer dish in back (2) by preceding outer dish (1), and forward and backward outer dish (1,2) passes to inner disc (3) by the one group of roller (4) in the unthreaded hole with moment of torsion, and then is passed to driven shaft; Power also can be complied with opposite direction transmission, i.e. from the driving shaft to the inner disc (2) are again successively to roller (4), the outer dish in back (2) and preceding outer dish (1), driven shaft.The elastic material of roller (4) outer surface play subtract, the effect of weakening, the driving shaft fluctuation of speed is by a small margin subtracted, is disappeared through this position.When baffle plate (5) plays dustproof shielding action, when not influencing master and slave moving axis by the Roller coupling transmitting torque to diaxon radially, axially, the timely compensation of angle deviation.

Because preceding outer dish (1), the outer dish in back (2) and inner disc (3) are gone up outside unthreaded hole internal diameter and the corresponding site that roller (4) contacts magnitude relationship directly, i.e. D ₁/ d ₁=D ₂/ d ₂=D ₃/ d ₃=c＞1, guaranteed the every rotating certain angle of Roller coupling, roller (4) is all relative pure rolling angle same within unthreaded hole (11,21,31), roller (4) and each unthreaded hole (11,21,31) on preceding outer dish (1), the outer dish in back (2), the inner disc (3) are pure rolling and not sliding when inwall contacts, and have reduced the energy loss and the component wear of giving birth to because of friction significantly.

Because magnitude relationship of each group unthreaded hole internal diameter and contacted with it roller (4) corresponding site external diameter and respectively organize the unification of unthreaded hole position, guaranteed to subtract by a small margin, the isogonism speed after the weakening between the master and slave moving axis concerns.

Because the internal diameter (D of unthreaded hole (11,21,31) ₁, D ₂, D ₃) and roller (4) corresponding site external diameter (d ₁, d ₂, d ₃) difference is very little (generally gets D ₁/ d ₁=D ₂/ d ₂=D ₃/ d ₃=c=1.05), and the cylinder appearance of roller (4) and unthreaded hole (11,21,31) inwall has certain elasticity, so roller (4) big with the area of contact of unthreaded hole (it is that face contacts that modified line contacts), extrusion stress reduces significantly, thereby the effectiveness of material is given full play to.

Although that Roller coupling in use rubs is little, efficient is high, but continuity along with working time, outside the roller (4) through reducing gradually, and the internal diameter of respectively organizing unthreaded hole (11,21,31) constantly increases, cause the outer inwall that coils (2) in inner disc (3) outer and back under roller (4) restriction, to grind lentamente mutually voluntarily, form a pair of gear coupling gradually.

Original its of Roller coupling is in contact with one another and a little is rolling friction, consumes little, wearing and tearing slowly, adds that again the gear coupling of formation was worked simultaneously afterwards, so its life-span is able to corresponding increasing considerably in the nature of things.

The maximum radial compensation rate of Roller coupling (being at 0 o'clock in axial and angular compensatory amount) is

ΔD＝(D ₁－d ₁)/2＋(D ₃－d ₃)/2＝(D ₂－d ₂)/2＋(D ₃－d ₃)/2.

Work as D ₁=D ₂=D ₃=D, d ₁=d ₂=d ₃During=d

Δ D=D-d. its radially, axially and angular compensatory very capable, and, move more steady radially, axially and angle when compensating at full capacity.After satisfying the compensation requirement, can suitably reduce unthreaded hole (11,21,31) internal diameter, thereby the effectiveness of material is given full play to, simultaneously the also corresponding volume and weight that reduces Roller coupling (can by reducing the corresponding minimizing material consumption of size of outer dish 1,2 and inner disc 3).

Roller coupling has overcome box coupling, flange coupling radially, axially and the shortcoming of angular compensatory ability, overcome oldham coupling, the engagement toothed coupling, chain coupling, flat spring coupling, diaphragm coupling, universal coupling with spider, manufacturing complexity such as ball cage synchronous universal coupling, cost is high and cause efficient low because of friction, the shortcoming that component wear is big is radially a kind of, axially, the angular compensatory ability is strong, damping capacity is strong, complete in specifications, make easy, easy for installation, cost is low, energy consumption is low, the practical coupling that life-span is long; Because it is stable, the constant speed of radial difference, transmitting torque and the low characteristic of cost efficiently greatly, Roller coupling can come the involute planetary gear retarder that development efficiency is higher, wearing and tearing are lower, price performance is bigger as mechanism such as angular velocity ratio such as grade.

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 is respectively that the master and slave moving axis that is used for φ 42-φ 30, rotating speed 1450rpm connects preceding outer dish (1), back outer dish (2), inner disc (3), roller (4), the baffle plate (5) of (LZG42-30 * 1450 types) Roller coupling that uses and locatees plan view, left view or the plan view of pin (6).

Fig. 7 is the ssembly drawing of above part.

Fig. 8 is the analysis chart of Roller coupling radial compensation to the rotating speed influence.As shown in Figure 8, O ₁, O ₂Be respectively the spindle axis position of master and slave Moving plate, x is the additional rotation displacement amount, and a is that maximum additional rotation is a displacement amount, and b is the spindle axis side-play amount, additional rotation displacement amount x is the determinant factor whether the driven disc rotating speed equates with the driving disc rotating speed in the moment of torsion transmittance process $x=2R\sin \frac{\mathrm{\β}}{2}$ $\mathrm{\γ}=\frac{\mathrm{\π}}{2}-\mathrm{\θ}+\frac{\mathrm{\π}-\mathrm{\β}}{2}=\mathrm{\π}-(\mathrm{\θ}-\frac{\mathrm{\β}}{2})$

b ²＋x ²－2bx·cosγ＝a ². $b^2+x^2-2\mathrm{bx}\·\cos [\mathrm{\π}-(\mathrm{\θ}-\frac{\mathrm{\β}}{2})]=a^2$

Know by following formula, when b=a, additional rotation displacement amount x=0; When b=0, additional rotation displacement amount x=a, additional rotation displacement amount x is constant under the both of these case, and is irrelevant with rotation angle, can carry out the rotating speed transmission without distortion, is optimal two kinds of special circumstances.But under ordinary circumstance (b ≠ a and b ≠ 0), additional rotation displacement amount x is not a constant, and the value of its maximum variation Δ x has determined the fidelity that rotating speed transmits, and should take measures effectively with its absorption.The roller hexad is uniform around main shaft, then works as $\mathrm{\&theta;}=\frac{\mathrm{\&beta;}}{2}$ The time, b ²+ x ²-2bxcos π=a ². be that b+x=a. gets minimum rotation displacement amount x _Min=a-b. at this moment $\mathrm{\&theta;}=\frac{\mathrm{\&beta;}}{2}=\arcsin \frac{x}{2R}=\arcsin \frac{a-b}{2R},$ X and b and overlap with a respectively on same straight line.When $\mathrm{\&theta;}=\frac{\mathrm{\&beta;}}{2}\&PlusMinus;\frac{\mathrm{\&pi;}}{6}$ The time, ${\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="Y0026724200081.png"\; state="\{\{state\}\}">b</figure-callout>}}^2+x^2-2\mathrm{bx}\&CenterDot;\cos (\mathrm{\&pi;}\&PlusMinus;\frac{\mathrm{\&pi;}}{6})=a^2$ Promptly ${\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="Y0026724200081.png"\; state="\{\{state\}\}">b</figure-callout>}}^2+x^2+2\mathrm{bx}\&CenterDot;\cos \frac{\mathrm{\&pi;}}{6}=a^2$ $x^2+\sqrt{3}\mathrm{bx}+(b^2-a^2)=0$ Get the maximum rotational displacement amount $x_{\max }=\frac{-\sqrt{3}b\&PlusMinus;\sqrt{{3b}^2-4(b^2-a^2)}}{2}={\{}_{-\frac{\sqrt{3}}{2}b-\frac{1}{2}b\sqrt{4\frac{a^2}{b^2}-1}<0.}^{-\frac{\sqrt{3}}{2}b+\frac{1}{2}b\sqrt{4\frac{a^2}{b^2}-1},}$ Casting out negative value gets $x_{\max }=-\frac{\sqrt{3}}{2}b+\frac{1}{2}b\sqrt{4\frac{a^2}{b^2}-1.}$ Thereby $\mathrm{\&Delta;x}=x_{\max }-x_{\min }=\frac{\sqrt{3}}{2}b+\frac{1}{2}b\sqrt{4\frac{a^2}{b^2}-1}-a+b=(1-\frac{\sqrt{3}}{2})b+\frac{1}{2}b\sqrt{4\frac{a^2}{b^2}-1}-a.$ Ask when a (as a=1.5mm) determines the maximum value that Δ x changes with b: order $\frac{\&PartialD;\mathrm{\&Delta;x}}{\&PartialD;b}=1-\frac{\sqrt{3}}{2}+\frac{1}{2}\sqrt{4\frac{a^2}{b^2}-1}+\frac{\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="Y0026724200081.png"\; state="\{\{state\}\}">b</figure-callout>}}{2}\&CenterDot;\frac{1}{2}\&CenterDot;(-4\&times;2\frac{a^2}{b^3})\frac{1}{\sqrt{4\frac{a^2}{b^2}-1}}$ $=(1-\frac{\sqrt{3}}{2})+\frac{1}{2}\sqrt{4\frac{a^2}{b^2}-1}-2\frac{a^2}{{\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="Y0026724200081.png"\; state="\{\{state\}\}">b</figure-callout>}}^2}\frac{1}{\sqrt{4\frac{a^2}{b^2}-1}}=0.$ $(1-\frac{\sqrt{3}}{2})\sqrt{4\frac{a^2}{b^2}-1}-\frac{1}{2}=0$ $\frac{a^2}{b^2}=\frac{1}{4}\&CenterDot;[{\left(\frac{1}{2-\sqrt{3}}\right)}^2+1]$ So have $b=\frac{2(2-\sqrt{3})}{\sqrt{{(2-\sqrt{3})}^2+1}}a=0.51763809a.$ At this moment $\frac{a^2\mathrm{\&Delta;x}}{{\&PartialD;\mathrm{<figure-callout\; id="2"\; label="b"\; filenames="Y0026724200081.png"\; state="\{\{state\}\}">b</figure-callout>}}^2}<0,$ Know and work as $\frac{2(2-\sqrt{3})}{\sqrt{{(2-\sqrt{3})}^2+1}}$ The time, Δ x gets maximum Δ x _Max, when getting a=1.5mm,

＝0.03527618a＝0.05291427mm.

At this, maximum is maximum value.

Earlier preceding outer dish (1) is installed in driving shaft (or driven shaft) during installation, respectively backboard (5), the outer dish in back (2) are inserted in driven shaft (or driving shaft) sequentially again, again inner disc (3) is installed in driven shaft (or driving shaft), outer dish (1) before screwing location pin (6) then and will the outer dish in back (2) being anchored on, insert roller (4), with bolt backboard (5) is anchored on outer dish (1,2) again, should notes adjusting master and slave moving axis at last and make Roller coupling at compensating coefficient at full capacity radially.

Roller is many more, and its circumferential distribution density is big more, and driving and driven mechanical axis is strong more through the synchronization extent of rotating speed that Roller coupling transmits, but roller quantity can not infinitely increase, and can only can increase to the greatest extent.Because when b=a (promptly exposing and criticizing radial missing at full capacity) and b=0 (no radial missing), rotational displacement x is constant (x| _B=a=0, x| _B=0=a), Roller coupling all can make the instantaneous speed drive shaft (instant servo-actuated) that obtains of driven shaft; Because rolling friction is very little, torque also can efficient transfer.Make b=0 be difficult to accomplish, this also just coupling need the basic reason of radial compensation; But for Roller coupling, desire to make b=a but to be very easy to, after roller is installed, at will artificially with driving shaft or driven shaft up and down, left and right or other either direction tuningout is to making each roller all be close to its corresponding three unthreaded holes, make it at compensating coefficient at full capacity radially, promptly satisfy the condition of b=a, at this moment, x ≡ 0, and Δ x=0, rotating speed transmits undistorted, and master and slave moving axis rotates synchronously, promptly master and slave moving axis " instant servo-actuated ".Therefore, when being installed, Roller coupling should note this details program.

Even do not satisfy the condition of b=0 or b=a when installing, and the speed transmission of causing has deviation, when the driving shaft constant speed is rotated, output speed has fluctuation, because roller has fluctuation to the pressure of corresponding unthreaded hole, it is inhomogeneous stressed that the unthreaded hole inwall is periodically repeatedly repeated everywhere, and the distortion of pressure eminence is heavy, wearing and tearing are heavy, along with the prolongation of working time, very little departure (Δ x _Max=0.03527618a) because each unthreaded hole by " break-in " of its respective rollers and " pressing ", transmits and make rotating speed be able to " fidelity " very soon.In addition, departure Δ x _Max=0.03527618a=0.053mm can be absorbed by elastic roller fully at an easy rate.

The preceding outer dish (1) of LZG42-30 * 1450 type Roller couplings, the outer dish in back (2) and inner disc (3) are formed by the casting of HT-200 material, do not carry out cold machining processing except that junction plane is installed; Preceding outer dish (1) profile is a disk, and the location cone shape hole of the parallel axes of one group of two axis and power axis hole is arranged on it, and other has the parallel axes of hexad axis and power axis hole, the not light-passing hole of φ 16.75 (internal diameter is a bit larger tham footpath outside the roller 4); The inner chamber of the outer dish in back (2) is the knuckle-tooth internal gear that approaches six prisms; The disk body of inner disc (3) also is the knuckle-tooth external gear that approaches six prisms, the parallel axes of hexad axis and power axis hole, the through hole (isometrical with the not light-passing hole on the preceding outer dish 1) of φ 16.5 (internal diameter is a bit larger tham footpath outside the roller 4) are arranged on it, and the silk hole of one group of cone shape hole centering on hexad and the preceding outer dish (1) is arranged; Roller (4) uses the nylon 66 (also available 45# steel, outer cylinder lay the thick oil resistant rubber of 0.5mm, and its external diameter is φ 16mm) of φ 15; The sheet metal (51) of baffle plate (5) uses the thick A3 steel plate of 3mm, and ripple elastic plate (52) substitutes with the thick oil-resistant rubber slab of 1.5mm.And have

D ₁=D ₂=D ₃=D=16.75mm, d ₁=d ₂=d ₃=d=16mm, and c=D/d=D ₁/ d ₁=D ₂/ d ₂=D ₃/ d ₃=16.75/16=1.046875＞1 is D wherein ₁, D ₂, D ₃Unthreaded hole (11,21,31) internal diameter before being respectively on outer dish (1), the outer dish in back (2) and the inner disc (3), d ₁, d ₂, d ₃Be respectively contact with unthreaded hole inwall on preceding outer dish (1), the outer dish in back (2) and the inner disc (3) external diameter at position of roller (4).Its maximum radial compensation rate is

ΔD＝D ₁－d ₁＝D－d＝16.5－15＝1.5(mm)。

By the manufacturing of LZG42-30 * 1450 type Roller couplings, installation and operation using process as seen, LZG42-30 * 1450 type Roller coupling manufacturings are simple, cheap; Easy for installation; Radially, axially, angular compensatory is very capable, damping capacity is strong, the efficient height uses reliably, the life-span is long.It has illustrated the real advantage of Roller coupling typically.

Roller coupling is a kind of outstanding line shaft coupling mechanism really, is the coupling that is worth of widely use.

Claims (6)

1, Roller coupling, for a kind of radially, axially, the angular compensatory ability is strong, volume is little, the efficient height, transmitting torque is big and steady, the line shaft coupling mechanism that price performance is high is mainly by preceding outer dish (1), back outer dish (2), inner disc (3), roller (4), baffle plate (5) and location pin formations such as (6); Outer dish (1) is installed in power engine before it is characterized in that, the power output of working machine, on the input main shaft, the outer dish in back (2) is affixed with location pin (6) with preceding outer dish (1), inner disc (3) outside preceding, coil between (1) and the outer dish in back (2) by one group of axis and line shaft the approximately parallel roller of axis (4) with preceding outside coil (1) and after outside coil (2) and carry out transmission of power, inner disc (3) is installed in working machine, the power input of power engine, on the output main shaft, (1) is coiled with restriction roller (4) in the outside of baffle plate (5) dish (2) outside the main axis direction is fixed in the back outside preceding, outer dish in back (2) and inner disc (3) go up in the circular hole the position and to preceding outer dish (1), the outer dish in back (2), inner disc (3), roller (4) etc. has the shielding of preventing dust of the position of rolling friction.

2,, be equipped with on outer dish (1), the outer dish in back (2), the inner disc (3) before it is characterized in that the parallel axes of one group of axis and line shaft and three groups are corresponding, three groups of corresponding coaxality height, diameters are respectively D according to the described Roller coupling of claim 1 ₁, D ₂, D ₃, the footpath is respectively d outside roller (4) corresponding site that contacted ₁, d ₂, d ₃Unthreaded hole (11,21,31), and have

D ₁/ d ₁=D ₂/ d ₂=D ₃/ d ₃=c＞1, D ₁=D ₂And d ₁=d ₂Relation, roller (4) places in one group of three hole (11,21,31) of centering.A kind of special circumstances are

D ₁=D ₂=D ₃=D, d ₁=d ₂=d ₃=d and D＞d, D/d=c＞1.

3, according to the described Roller coupling of claim 1, it is characterized in that the outer dish in back (2) is hollow cylindrical, have on its outer end disk one group with preceding outer dish (1), inner disc (3) upward corresponding, parallel, the diameter of corresponding circle hole with spindle hole be D ₂One group of unthreaded hole, its cylindrical side wall internal surface is the knuckle-tooth internal gear, the knuckle-tooth center is provided with one group of hole parallel with spindle hole that is used to be provided with clamping bolt and location pin, the number of teeth is with clamping bolt and locate the sum of pin and equate.

4, according to the described Roller coupling of claim 1, it is characterized in that inner disc (3) outer rim for corresponding with the knuckle-tooth internal gear of outer dish (2), again the knuckle-tooth external gear in suitable gap is arranged mutually, establish in the gear teeth with the last corresponding one group of diameter of unthreaded hole of preceding outer dish (1), the outer dish in back (2) be D ₃Unthreaded hole.

5, according to the described Roller coupling of claim 1, it is characterized in that the whole particularly cylindrical outer surface of roller (4) makes with the stronger material of elasticity, cylndrical surface cladding material segmentation contacts respectively with preceding outer dish (1), the outer wall that coils the unthreaded hole (11,21,31) on (2), the inner disc (3) in back.

6, according to the described Roller coupling of claim 1, it is characterized in that baffle plate (5) is made up of sheet metal (51) and ripple elastic plate (52), sheet metal (51) connects firmly the outer outer end of coiling (2) in the back, and the axle sleeve outer wall of ripple elastic plate (52) inner edge and inner disc (3) meets with spacing to roller (4) and to the shielding of preventing dust of the position of each rolling friction.

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