Hammerhead Tower Crane, QTZ50 TC4810-4 Manufacturer

Hammerhead Tower Crane, QTZ50 TC4810-4

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, QTZ50 TC4810-4

Overview

QTZ50 TC4810-4 hammerhead tower crane consists of a horizontal arm, a jib, a hoisting mechanism, a trolleying mechanism, a slewing mechanism, a hydraulic jacking system and a cabin. As a high-level slewing tower crane, our tower crane now is widely used for constructions of high-rise restaurants, civilian buildings and industrial buildings. It is an ideal choice for small and middle-size construction enterprises.

The fast-erecting crane has a lot of merits. Firstly, the jib, held by rigid duplex pull rods, features good rigidity, light weight, small cross section, small wind resistance, uniform force distribution and good-looking appearance. Secondly, in the hoisting mechanism, a three-speed motor and a single-stage gear reducer used can ensure low-speed heavy loading and high-speed light loading. The maximum hoisting speed reaches 62.5 m/min. Furthermore, the operators cabin runs along the horizontal arm with traction by the trolleying mechanism, which leads to perfect positioning. Equipped with a planetary reducer and a hydraulic coupler, the slewing mechanism achieves great bearing capacity, smooth startup, reliable performance, wind resistance and accurate positioning.

Besides all the characteristics above, the hammerhead tower crane is designed with some new features. It comes with a newly-developed chassis, which ensures uniform force exposed to the joint part between the slab and mask sections, thereby improving the tower cranes lifetime and safety factor. Instead of a one-piece jib, the self-erecting crane utilizes a jib made up with multiple sections. In addition, a dismounting tool is installed on the middle section to facilitate disassembly. Moreover, twist control devices are added to prevent the steel wire rope from twisting together and release the ropes twist force to further avoid fracture.

The hammerhead tower crane can automatically lift itself by adding mask sections with the help of a hydraulic cylinder. Hence, the crane can rise with a building's ascending. Furthermore, it can be fixed on a base or attached to an external wall. Its freestanding height is 30 meters, while its attached height can be 140 meters and 70 meters respectively for situations with multiplier as 2 and 4. Therefore, it is suitable for different construction projects.

Mast Section
Jib
Detail Description
Turntable

Technical Parameters

Hammerhead Tower Crane Specifications
Total Power: 21.2kW
Voltage: 380V10
Frequency: 50Hz/60Hz

Technical Parameters

Multiplying			2	4
Rated Load Moment		kNm	500
Maximum Hoisting Capacity		t	2	4
Radius at Maximum Hoisting Capacity		m	26	13.8
Tip Load		t	1	0.98
Hook Radius		m	3- 48
Freestanding Height			30
Hoisting Speed		m/min	62/31/9	31/15.5/4.5
Rated Hoisting Capacity		T	1/2/2	2/4/4
Slewing Speed		r/min	0.6
Trolleying Speed		m/min	40/20
Minimum Steady Descending Speed			9
Overall Dimension	Base	m	5 5 1.1
	Total Height		37.27
	Distance between Jib Tip to Slewing Center		48.87
	Distance between Balance Arm Tip to Slewing Center		11.18
Others	Total Motor Power	KW	21.2
	Maximum Working Wind Speed	m/s	20
	Maximum Jacking Wind Speed		12
	Working Temperature		-20 C - 40C

Support Mechanisms

Loading Rate	Hoisting Mechanism			JC 40%
	Slewing Mechanism			JC 40%
	Trolleying Mechanism			JC 40%
Working Grade	Hoisting Mechanism			M
	Slewing Mechanism			M
	Trolleying Mechanism			M
	Hydraulic Jacking System			M
Trolleying Mechanism	Traction	N		4000
	Motor	Speed	r/min	1380	720
	Power	kW		2.4	1.5
	Reducer	Reduction Ratio		38
	Steel Wire Rope	Specification		6X19W-7.7-1550-FC-ZS
		Line Speed	m/min	40/20
	Trolleying Speed			40/20
Hoisting Mechanism	Motor	Model		YZTD200L2-4/8/24
		Speed	r/min	1420	700	210
		Power	kW	15	15	4
	Reducer	Center Distance	mm	500
		Transmission Ratio	i	15.2
	Winch Drum	Diameter	mm	405
		Layer of Rope	Layer	4
		Rope Capacity	m	280
		Speed	r/min	95	47	14.5
	Brake	Model		YWZ3-250/45
		Braking Force	N	450
	Steel Wire Rope	Traction	N	10000
		Specification		6X19W-11-1770-FC-ZS
	Hoisting Speed		m/min	62.5/31/9	31.3/15.5/4.6
	Rated Hoisting Capacity		T	1/2/2	2/4/4
	Minimum Steady Descending Speed		m/min	9
	Slewing Mechanism	Motor	Model	YZR132M2-6
Speed			r/min	910
Power			kW	3.7

Slewing Mechanism	Reducer	Model		XX4-100
		Transmission Ratio	i	157
		Output Torque	N m	10000
	Wheel Gear	Module	m	10
		Tooth Number	z	13
		Modification Coefficient	x	0.5
	Hydraulic Coupler	Model	YOX280
	Matched Slewing Bearing	Model	011.40.1120
	Slewing Speed		r/min		0.6
Hydraulic Jacking System	Hydraulic Pump Station	Working Pressure	MPa		22
		Power	kW		4
	Hydraulic Cylinder	Rated Pressure	MPa		22
		Diameter	mm		125
		Rod Diameter	mm		90
		Stroke	mm		1320
		Installation Distance	mm		1700
		Jacking Speed	m/min		0.4
		Maximum Jacking Capacity	t		27

Hoisting Characteristics

48m Multiplying 2
Radius (m)	3 26	27	28	29	30	31	32	33	34	35	36	37	38	39	40
Hoisting Capacity (Kg)	2000	1979	1888	1803	1724	1654	1591	1534	1483	1437	1396	1357	1319	1282	1248
Radius (m)	41	42	43	44	45	46	47	48
Hoisting Capacity (Kg)	1215	1182	1150	1119	1089	1059	1029	1000
48m Multiplying 4
Radius (m)	3 13.8	14	15	16	17	18	19	20	21	22	23	24	25	26	27
Hoisting Capacity (Kg)	4000	3940	3888	3750	3487	3254	3046	2860	2693	2541	2403	2277	2162	2055	1957
Radius (m)	28	29	30	31	32	33	34	35	36	37	38	39	40	41	42
Hoisting Capacity (Kg)	1866	1781	1702	1632	1569	1512	1461	1415	1374	1335	1297	1260	1226	1193	1160
Radius (m)	43	44	45	46	47	48
Hoisting Capacity (Kg)	1128	1097	1067	1037	1007	978
42m Multiplying 2
Radius (m)	3 26.9	27	28	29	30	31	32	33	34	35	36	37	38	39	40
Hoisting Capacity (Kg)	2000	1997	1906	1821	1742	1672	1609	1552	1501	1455	1414	1375	1337	1300	1226
Radius (m)	41	42
Hoisting Capacity (Kg)	1233	1200
42m Multiplying 4
Radius (m)	3 14.3	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Hoisting Capacity (Kg)	4000	3894	3756	3493	3260	3046	2866	2699	2547	2409	2283	2168	2061	1963	1872
Radius (m)	29	30	31	32	33	34	35	36	37	38	39	40	41	42
Hoisting Capacity (Kg)	1787	1708	1638	1575	1518	1467	1421	1380	1341	1303	1266	1232	1199	1166
36m Multiplying 2
Radius (m)	3 27.8	28	29	30	31	32	33	34	35	36
Hoisting Capacity (Kg)	2000	1992	1907	1828	1758	1695	1638	1587	1541	1500
36m Multiplying 4
Radius (m)	3 14.8	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Hoisting Capacity (Kg)	4000	3980	3842	3579	3346	3132	2952	2785	2633	2495	2369	2254	2147	2049	1958
Radius (m)	29	30	31	32	33	34	35	36
Hoisting Capacity (Kg)	1873	1794	1724	1661	1604	1553	1507	1466

Components