CN201154866Y

CN201154866Y - Driving gear for elevator

Info

Publication number: CN201154866Y
Application number: CNU200720192660XU
Authority: CN
Inventors: 王志强; 潘式正
Original assignee: NINGBO XINDA TRACTION MACHINE TECHNOLOGY Co Ltd; NINGBO XINDA ELEVATOR FITTING WORKS
Current assignee: Ningbo Xinda Elevator Fitting Works
Priority date: 2007-11-24
Filing date: 2007-11-24
Publication date: 2008-11-26
Anticipated expiration: 2017-11-24

Abstract

The utility model discloses a traction machine of an elevator, comprising a dismountable bearing wallboard frame body which consists of a front support (2) and a back support (7); a central axis (1), one end of which is fixed on the front support (2); a stator (4) which is fixed on the central axis (1); and an external rotor (5) which is sheathed on the outside of the stator (4) and can rotate. Two ends of the external rotor (5) are respectively fixed with a front end cover (3) and a back end cover (6). The front end cover (3) and the back end cover (6) are supported on the central axis (1) by a bearing. A center hole on the back end cover (6) which is coaxial with the central axis (1) is interference fitted with a rotation axis (11). The rotation axis (11) is arranged on the back support (7). An encoder (10) is arranged on one end face at the other end of the rotation axis (11). The traction machine of the elevator improves the output precision of the encoder, eliminates shaking of the car during the operation of the elevator caused by deviation of the speed feedback signal and significantly improves the comfortable feeling of passengers.

Description

Elevator traction machine

Technical field

The utility model relates to a kind of corollary apparatus of elevator, specifically is a kind of elevator traction machine.

Background technology

Along with elevator use more and more widely, people are also more and more higher to the requirement of elevator.And elevator traction machine is one of key device that influences elevator operation, requires not only that its volume is little, floor area is few, and requires it to operate steadily, and does not have tangible shake when elevator moves.

The application for a patent for invention formerly of publishing on China national intellectual property board web its publication number and be the applicant of CN 1746096A discloses a kind of elevator traction machine, with compare in its first prior art, this elevator traction machine is simple in structure, compact, volume is little, in light weight, floor area is few, highly versatile, be easy to promote.But still there is blemish in an otherwise perfect thing:

When needs are exported tach signal by coder, can only solve with the transition gear that a pair of number of teeth equates, promptly, it is that brake wheel also is on the rear side housing of traction sheave rotation that a gear is fixed on outer rotor, another gear that is installed with little axle supports in the back by bearing installation, center shaft (or hole) with coder is installed on this little axle then, and the shell of coder (fixed part) is fixed in the supporting.At this moment, when outer rotor rotates, be fixed on the gear speed rotation together on the end cap, and drive and another gear rotation of its ingear, coder also rotates thereupon at this moment, gets final product the frequency converter that the output speed feedback signal is powered.Because this invention is to transmit tach signal by a pair of gear, therefore, the precision of the speed feedback signal of coder output just depends on the working accuracy and two installation site sizes that gear is relative of gear itself, this has not only improved manufacturing cost, increased the loaded down with trivial details property of installing, more shortcoming is, this structure often is difficult to satisfy the requirement of elevator stationarity under the situation that requires the high precision speed governing sometimes, causes car that more significantly shake is arranged.

The utility model content

The technical problems to be solved in the utility model is, a kind of advantage of application for a patent for invention formerly that both kept is provided, overcome its shortcoming again: improve the coder output accuracy, eliminate because the elevator traction machine that the car of the deviation of speed feedback signal when causing the elevator operation shaken.

Technical solution of the present utility model is, a kind of elevator traction machine is provided, comprise the detachable load-bearing wall panel support body of forming by preceding supporting and back supporting, center shaft before one end is fixed in the supporting, be fixed on the stator on the center shaft, be enclosed within the outer rotor of stator outside rotation, the two ends of outer rotor are fixed with front end cover and rear side housing respectively, front end cover is bearing on the center shaft through bearing, rear side housing also is bearing on the center shaft through bearing, traction sheave and brake wheel are fixed on the outer rotor, and the drg that cooperates with brake wheel and measuring speed and fixed arranged, the coder of rotor field relative position, on the described rear side housing with the centre hole of spigot shaft coaxle line in interference fit one S. A. is arranged, in back supporting, coder is installed on the end face of the other end of S. A. the other end of S. A. by bearing installation.

After adopting above structure, the utility model elevator traction machine compared with prior art has the following advantages:

Because the most of structure of the utility model elevator traction machine still adopts the structure of the applicant's application for a patent for invention formerly, so, still kept the advantage of application for a patent for invention formerly, promptly this elevator traction machine is simple in structure, compact, volume is little, in light weight, floor area is few, highly versatile, be easy to promote.

Again since on the utility model elevator traction machine rear side housing with the centre hole of spigot shaft coaxle line in interference fit one S. A. is arranged, the other end of S. A. supports in the back by bearing installation, coder is installed on the end face of the other end of S. A., so, overcome the shortcoming of application for a patent for invention formerly: when outer rotor rotates, the S. A. that is fixed on the end cap will rotate with speed with outer rotor, reduced the driving error of intermediate link, the exportable high-precision speed feedback signal of coder (improving 4～5 times of precision), eliminated fully because the shake of car during elevator operation that the deviation of speed feedback signal causes, can significantly improve passenger's comfort.Simultaneously, S. A. and end cap central bore only need interference fit to get final product, and have significantly reduced manufacturing cost, install also more convenient.

As improvement, described brake wheel and traction sheave and outer rotor are made same body, make the advantage of application for a patent for invention formerly preserve more completely.

As improving again, the described bearing that is installed in the S. A. other end is preferably the load-bearing bearing, to support the weight of outer rotor and this end of stator better, avoid the shake of outer rotor, the same speed that guarantees outer rotor and S. A. is better rotated, so that the precision of the speed feedback signal of coder output is higher.

Description of drawings

Fig. 1 is the structure cross-sectional schematic of the utility model elevator traction machine.

Fig. 2 is the structure cross-sectional schematic of elevator traction machine of the applicant's application for a patent for invention formerly.

Shown in the figure 1, center shaft; 2, preceding supporting; 3, front end cover; 4, stator; 5, outer rotor; 6, rear side housing; 7, back supporting; 8, bearing; 9, bearing; 10, coder; 11, S. A.; 12, gear; 13, little axle; 14, gear.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

As shown in Figure 2.

The applicant's application for a patent for invention formerly is the elevator traction machine of prior art, comprise by preceding supporting 2 and the back supporting 7 detachable load-bearing wall panel support bodys of forming, center shaft 1 before one end is fixed in the supporting 2 is fixed on the stator 4 on the center shaft 1, is enclosed within the outer rotor 5 of stator 4 outsides rotation.The two ends of outer rotor 5 are fixed with front end cover 3 and rear side housing 6 respectively, and front end cover 3 is bearing on the center shaft 1 through bearing, and rear side housing 6 also is bearing on the center shaft 1 through bearing 8.Traction sheave and brake wheel are fixed on the outer rotor 5, and it is cylindrical shell that described brake wheel and traction sheave and outer rotor 5 are made same body, and the magnet dress of outer rotor 5 is attached on the medial surface of cylindrical shell.The other end of center shaft 1 is fixed in the back supporting 7.The coder 10 of drg that cooperates with brake wheel and measuring speed and stator and rotor magnetic field relative position in addition.One gear 14 is installed on the rear side housing 6 of outer rotor 5, it be installed in another gear 12 engagements on the little axle 13, coder 10 is installed on the little axle 13.When outer rotor 5 rotated, the gear 14 that drives on rear side housing 6 and the rear side housing 6 rotated with speed together, and gear 14 rotates synchronously with gear 12, and tach signal is passed to coder 10.

As shown in Figure 1.

The utility model elevator traction machine comprises that also the center shaft 1 before one end is fixed in the supporting 2 is fixed on the stator 4 on the center shaft 1, is enclosed within the outer rotor 5 of stator 4 outsides rotation by preceding supporting 2 and the back supporting 7 detachable load-bearing wall panel support bodys of forming.The two ends of outer rotor 5 are fixed with front end cover 3 and rear side housing 6 respectively, and front end cover 3 is bearing on the center shaft 1 through bearing, and rear side housing 6 also is bearing on the center shaft 1 through bearing 8.Traction sheave and brake wheel are fixed on the outer rotor 5, and it is cylindrical shell that described brake wheel and traction sheave and outer rotor 5 are made same body, and the magnet dress of outer rotor 5 is attached on the medial surface of cylindrical shell.The coder 10 of drg that cooperates with brake wheel and measuring speed and stator and rotor magnetic field relative position in addition.It more than is the utility model technical characterictic same as the prior art.

The characteristics of the utility model elevator traction machine are, on the described rear side housing 6 with the centre hole of center shaft 1 coaxial line in interference fit one S. A. 11 (an end) is arranged, the other end of S. A. 11 is installed in the back supporting 7 by bearing 9, and coder 10 is installed on the end face of the other end of S. A. 11.

The bearing 9 that is installed in S. A. 11 other ends is preferably the load-bearing bearing.

Referring to Fig. 1, principle of work of the present utility model is, after the frequency converter (not shown) passes to rotating field of three-phase alternating current electric forming for stator 4, drag outer rotor 5 rotations that permanent magnet is housed, the traction groove that several dress steel ropes are arranged in the middle of the cylindrical of outer rotor 5, one end of steel rope hangs mass, and the other end hangs manned car.When outer rotor 5 rotations, center shaft 1 is fixed with the inner ring of bearing 8, keep original quiescence, the outer ring of bearing 8 rotates with speed with the rear side housing 6 that is contained in outer rotor 5, simultaneously, also rotate with speed with the S. A. 11 of the rear side housing 6 centre hole interference fit of outer rotor 5 with outer rotor 5, the code-disc that drives the coder of fixing with the other end of S. A. 11 10 also rotates with speed, coder 10 can be exported high-precision speed feedback signal to frequency converter, has eliminated because the speed feedback signal deviation causes the phenomenon of elevator operation shake.

Claims

1, a kind of elevator traction machine, comprise the detachable load-bearing wall panel support body of forming by preceding supporting (2) and back supporting (7), one end is fixed on the center shaft (1) in the preceding supporting (2), be fixed on the stator (4) on the center shaft (1), be enclosed within the outer rotor (5) of stator (4) outside rotation, the two ends of outer rotor (5) are fixed with front end cover (3) and rear side housing (6) respectively, front end cover (3) is bearing on the center shaft (1) through bearing, rear side housing (6) also is bearing on the center shaft (1) through bearing (8), traction sheave and brake wheel are fixed on the outer rotor (5), and the drg that cooperates with brake wheel and measuring speed and fixed arranged, the coder of rotor field relative position (10), it is characterized in that: described rear side housing (6) is gone up and the interior interference fit of centre hole of center shaft (1) coaxial line has a S. A. (11), the other end of S. A. (11) is installed in the back supporting (7) by bearing (9), and coder (10) is installed on the end face of the other end of S. A. (11).

2, elevator traction machine according to claim 1 is characterized in that: described brake wheel and traction sheave and outer rotor (5) are made same body.

3, elevator traction machine according to claim 1 is characterized in that: described bearing (9) is the load-bearing bearing.