A gear coupling is a mechanical device for transmitting torque between two shafts that are not collinear. It consists of a flexible joint fixed to each shaft. The two joints are connected by a third shaft, called the spindle.

Each joint consists of a 1:1 gear ratio internal/external gear pair. The tooth flanks and outer diameter of the external gear are crowned to allow for angular displacement between the two gears. Mechanically, the gears are equivalent to rotating splines with modified profiles. They are called gears because of the relatively large size of the teeth.

Gear couplings and universal joints are used in similar applications. Gear couplings have higher torque densities than universal joints designed to fit a given space while universal joints induce lower vibrations. The limit on torque density in universal joints is due to the limited cross sections of the cross and yoke. The gear teeth in a gear coupling have high backlash to allow for angular misalignment. The excess backlash can contribute to vibration.

Gear couplings are generally limited to angular misalignments, i.e., the angle of the spindle relative to the axes of the connected shafts, of 4-5°. Universal joints are capable of higher misalignments.

Advantages of Tanso gear coupling

1. Lowest price based on large scale production.

2. High and stable quality level.

3. Widely used in various mechanical and hydraulic fields.

4. Compensation for axial, radial and angular misalignment.

5. Convenient axial pl ing assembly.

6. No brittlement at low temperature.

7. Good slippery and frictional properties.

8. Resistance to chemical corrosion.

9. Rich experience working with big companies in this field.

Design advantages

The Flexible Coupling method of connecting rotating shafts is a vital and necessary technique. Large massive shafting, loosely mounted in sleeve bearings and merely joined together by rigidly bolted flanges, cannot provide efficient mechanical power transmission. Especially today, as machine designers and builders demand higher speeds, higher torques, and higher misalignment capacities, the need for “flexibly connecting” this equipment becomes apparent.

A flexible coupling is necessary since it is practically impossible to achieve and maintain perfect alignment of coupled rotating shafts. During initial assembly and installation, precise alignment of the shaft axes is not only difficult to achieve but in many cases it is economically unfeasible. During operation, alignment is even more difficult to maintain. Shaft misalignment – caused by uneven bearing wear, flexure of structural members, settling of foundations, thermal expansion, shaft deflection and other factors – is an operating certainty. Because these factors are extremely difficult to control, a flexible coupling serves as an ideal answer to compensate or minimize the effects of unavoidable misalignment and end movement of coupled shafts.

 

A flexible coupling must provide three basic functions:

1. Physically couple together two rotating shafts for efficient transmission of mechanical power, transferring the torque of one shaft to the other, directly and with constant velocity.

2. Compensate for all types of misalignment between rotating, connected shafts without inducing abnormal stresses and loads on connected equipment, and without tangible loss of power.

3. Compensate for end or axial movement of the coupled shafts, preventing either shaft from exerting excessive thrust on the other and allowing each to rotate in its normal position.

   

Three types of misalignment must be effectively accommodated by a flexible coupling.

1. Parallel Offset – axes of connected shafts are parallel, but not in the same straight line.

2. Angular – axes of shafts intersect at center point of coupling, but not in the same straight line.

3. Combined Angular-Offset – axes of shafts do not intersect at point of coupling and are not parallel.

  

 

Product description

Crowned teeth coupling is a new kind flexible coupling which used in the connecting between drum and reducer in crane.

Features of DC gear coupling:

1.Steady and credible structure,it can predigest whole machines structure,reducing equipments weght

2.With well orientation capability,it is convinient for intalling and adjusting and easy maintance.

3.With orientation abrasion airetion ,it is very safety.

Type	Max speed	Nominal torque	Load on radial	Bore		Dimensions																Abrasion scale	Axial clearance	Loading place	Moment of inertia	Mass
				Diameter	Length
	nmax	Tmax	Frmax	dmax(H7)	Lmin	D	D1(h6)	D2(h9)	L1	L2	L3	L4	L5	L6	S(h9)	Ф2	n-d2	Bolt	a	d3	r	m1	Xmax	e	I	m
	r/min	N.m	N	mm		mm									mm							mm			Kg.㎡	Kg
DC01A DC01B	200	16000	18000	110	185	400	280	180	80	85	15 20	25	26	11	360	360	10－18	M16	30	M16	2.5	1.0	±2.5	88	1.0	80
DC02A DC02B	200	22400	25000	125	200	420	310	212	80	95	15 20	25	26	11	380	380	10－18	M16	30	M16	2.5	1.0	±2.5	88	1.5	100
DC03A DC03B	200	31500	35500	150	225	450	340	230	80	105	20	25	34	11	400	400	10－22	M20	30	M20	2.5	1.0	±2.5	88	2.5	120
DC35A DC35B	200	45000	50000	160	235	510	400	250	95	115	20 25	30	34	15	460	460	10－22	M20	30	M20	2.5	1.4	±2.5	106	3.0	150
DC04A DC04B	200	63000	71000	200	250	550	420	280	95	130	20 25	30	34	15	500	500	14－22	M20	20	M20	2.5	1.4	±2.5	106	4.5	190
DC05A DC05B	200	90000	90000	220	265	580	450	215	95	145	20 25	30	34	15	530	530	14－22	M20	20	M20	2.5	1.4	±2.5	110	7.25	245
DC55A DC55B	200	125000	112000	240	290	620	500	345	101	160	25 30	35	35	19	560	560	20－22	M20	13.3	M20	2.5	1.8	±2.5	110	10.3	330
DC06A DC06B	200	160000	140000	260	300	650	530	375	101	170	25 30	35	35	19	580	600	20－22	M20	13.3	M20	2.5	1.8	±2.5	116	15.5	385
DC65A DC65B	200	190000	165000	270	300	665	545	387	101	175	25 30	35	35	19	590	615	26－22	M20	10	M20	4	1.8	±2.5	116	18.3	435
DC07A DC07B	200	224000	180000	280	310	680	560	400	101	180	25 30	35	35	19	600	630	26－22	M20	10	M20	4	1.8	±2.5	116	21.4	485
DC08A DC08B	200	315000	224000	300	345	720	600	437	111	185	35	43	35	21	640	660	26－26	M24	10	M24	4	2.2	±2.5	118	30.6	550
DC09A DC09B	200	450000	280000	340	380	780	670	487	111	200	35	43	35	21	700	730	26－26	M24	10	M24	4	2.2	±2.5	118	40.2	650
DC10A DC10B	200	560000	355000	380	420	850	730	545	111	215	35	43	35	21	760	800	26－26	M24	10	M24	4	2.2	±2.5	120	65.1	890