CN101941628A

CN101941628A - Elevator tractor

Info

Publication number: CN101941628A
Application number: CN 201010282452
Authority: CN
Inventors: 周红芳; 王焕萍
Original assignee: Zhejiang Xizi Forward Electrical Machinery Co Ltd
Current assignee: Zhejiang Xizi Forward Electrical Machinery Co Ltd
Priority date: 2010-09-13
Filing date: 2010-09-13
Publication date: 2011-01-12

Abstract

The invention relates to an elevator tractor which adopts a flat composite belt. The elevator tractor sequentially comprises a brake (1), a rear bearing (8), an engine base (2), a traction wheel (9), a spindle (3), a front bearing (7), a permanent magnet synchronous motor (4), a protection cover (6) and an encoder (5), wherein the traction wheel (9) is provided with a traction slot (10) matched with the composite belt and directly arranged on the spindle (3), and two sides of the traction wheel (9) are fixed respectively through the front bearing (7) and the rear bearing (8) to form an integral structure which fixed on the engine base (2); and the diameter of the traction wheel (9) is generally larger than or equal to 80mm, which achieves the purpose of small machine with a large load. The invention has the advantages that the traction wheel and the spindle form the integral structure, and a bearing seat and the engine base are integrated, thus the elevator tractor has simple and convenient processing, high system running stability, low noise, long service life and compact and novel structure; the diameter of the traction wheel is small, and the volume is small, thus raw materials and the running cost are reduced; and the elevator tractor can be used for directly replacing the traditional geared tractor, fills the blank of the prior art and is a novel and unique elevator tractor.

Description

Elevator traction machine

Technical field

The present invention relates to a kind of elevator traction machine, especially a kind of elevator traction machine that adopts flat composite band traction belongs to vertical Lift type elevator parts.

Background technology

The traction of vertical Lift type elevator realizes traction by towing machine and steel rope usually, traction sheave generally is installed in the electric machine main shaft outside, the diameter of traction sheave and the relation of elevator device are: for the diameter that increases traction sheave will increase the moment of torsion that load produces on traction sheave, guarantee that elevator running characteristics then needs to increase the output torque of motor, usually the torque rating of motor is directly proportional with volume, and the increase of motor torque must increase the physical dimension of motor, makes increased also corresponding with cost of volume of motor like this; In addition, the diameter of traction sheave and elevator play the relation of braking time, under the situation that rated speed of lift is determined, starting or braking time are directly proportional with the flywheel inertia of elevator device, and the flywheel inertia of elevator device is that adding up obtains by the flywheel inertia of each movable parts (with square being directly proportional of parts diameter), as traction sheave, motor rotor, brake disks etc., and traction sheave is a part and parcel wherein, thus the traction sheave diameter reduce can reduce elevator starter or braking time.In addition, the relation of traction sheave diameter and lock torque, after reducing the traction sheave diameter, required lock torque also decreases, and allows to reduce the diameter of brake disc, has reduced the flywheel inertia of brake disc like this, makes the total flywheel inertia of system further reduce again.In addition, the minimizing of traction sheave diameter can also be saved the cost of raw MAT'L and machine up.This shows that the traction sheave diameter should be as far as possible little.

Generally use the towing machine of rope traction/traction in the market, can be subjected to bigger flexure stress with the contacted one section steel rope of traction sheave, the adverse effect that steel rope is caused for limit flexion stress, among the standard GB 7588-2003 clearly the regulation: though the number of share of stock of steel rope what, the pitch circle diameter of traction sheave, pulley or reel should be less than 40mm with the ratio of the nominal diameter of suspension strop; The nominal diameter of steel rope is not less than 8mm.For this reason, the diameter of traction sheave can be less than 320mm.

Chinese patent by retrieval, the invention of relevant elevator traction machine aspect is many, but does not have the utility model to relate to a kind of elevator traction machine structure; The invention that relevant composite band replaces rope traction also has, but be on existing towing machine structure, to use the alternative steel rope of flat composite band simply substantially, do not realize the traction sheave diameter is reduced and raw-material reduction, more not including traction sheave and main shaft is integral structure.

Summary of the invention

The present invention relates to a kind of elevator traction machine, is that flat composite band traction of a kind of employing and traction sheave and main shaft are integral structure, and product structure is novel compact, and the traction sheave diameter reduces greatly, and raw-material reduction has reduced the operating cost of elevator simultaneously.The utility model has overcome the deficiencies in the prior art, has particularly filled up the blank of prior art, provides a kind of traction sheave diameter little, and volume is little, process easy, characteristics such as noise is little.Below in conjunction with Reference numeral concrete technology contents of the present utility model is described.

A kind of elevator traction machine, for adopting the elevator traction machine of flat composite band traction, it comprises successively, drg 1, rear bearing 8, support 2, traction sheave 9, main shaft 3, front bearing 7, permagnetic synchronous motor 4, protective case 6 and coder 5, wherein, on the described traction sheave 9 the traction groove 10 that matches with composite band is arranged; Described traction sheave 9 directly is arranged on the main shaft 3, and both sides are fixed by front bearing 7 and rear bearing 8 respectively and constituted integral structure and adorn solid on support 2.

Described elevator traction machine, the diameter of its traction sheave 9 are less than or equal to 1/4th of ordinary steel rope traction sheave diameter and realize little type heavy, and the diameter of traction sheave 9 is generally more than or equal to 80mm.

3～5 (but not being restricted to 3～5) arranged for the traction groove 10 of placing flat composite band on the described traction sheave 9, between two traction grooves 10 that face mutually, can separate by adding ring washer 11; The quantity of traction groove 10 is by the load-bearing decision of elevator load-carrying and composite band, and the shape of traction groove 10 and the shape of selected composite band match.

Described permagnetic synchronous motor 4 is uncanned cantilever design, is fixed on a side of support 2, and the stator core of permagnetic synchronous motor 4 is exposed outside.

Described coder 5 is installed with the coaxial homonymy of permagnetic synchronous motor, and links to each other with permagnetic synchronous motor 4 by protective case 6.

Described traction sheave 9 is an arch, or flute profile, perhaps other geometry form.

Described drg 1 is an axle braking device, and drg is fixed on the opposite side of support 2.

The present invention compared with prior art has the feature of tangible difference and prior art, specifically has: 1, adopt flat composite band traction/traction; 2, traction sheave and main shaft are integral structure, bearing seat and support one, process easy, system's running stability height, noise is little, long working life, compact conformation novelty; 3, the traction sheave diameter is little, and volume is little, processes easyly, and noise is little, has reduced the cost of raw material, has reduced the operating cost of elevator simultaneously; 4, required little, the time weak point of starting lock torque of motor, the drg volume is little; 5, the elevator traction machine linear velocity is little, and traction ratio was fit to make 1: 1, can directly replace existing geared machine, has filled up the blank of prior art, is a kind of novel unique elevator traction machine.

Description of drawings

Fig. 1 is structural representation of the present invention (partly cuing open embodiment);

Fig. 2 is a traction sheave unitized construction scheme drawing among Fig. 1.

Indicate among the figure: 1, drg, 2, support, 3, main shaft, 4, permagnetic synchronous motor, 5, coder, 6, protective case, 7, front bearing, 8, rear bearing, 9, traction sheave, 10, the traction groove, 11, ring washer.

The specific embodiment

Further set forth technology contents of the present invention and embodiment below in conjunction with accompanying drawing 1,2.

Accompanying drawing 1 expression the present invention is at the elevator traction machine that adopts the composite band traction; comprise successively; drg 1, rear bearing 8, support 2, traction sheave 9, main shaft 3, front bearing 7, permagnetic synchronous motor 4, protective case 6 and coder 5; adopt composite band to replace steel rope, the diameter of traction sheave 9 can be accomplished little of 80mm.Because traction sheave 9 is the design formula structures that become one on main shaft 3 directly, and after the fixing of both sides, be installed in together and carry complete machine weight on the support 2 with front bearing 7 and rear bearing 8.According to the load-carrying of elevator and the load-bearing of composite band, can be designed to the traction groove 10 of varying number on the traction sheave 9, normally 3～5 of traction grooves 10, the width of traction sheave 9 and shape determine that according to the form of selected composite band traction sheave can be designed to multiple versions such as arch, flute profile.

Described permagnetic synchronous motor 4 is fixed on a side of support 2, is cantilever structure, and this structure does not have shell, directly stator core is exposed to link to each other with support 2 outside.

The present invention only is described in detail with regard to a most preferred embodiment of the present invention; but can not be interpreted as restriction to other modes of the invention process; everyly further improve and similar or identical scheme on basis of the present invention, all being considered as is the scope that the present invention asks for protection.

Claims

1. elevator traction machine, it is characterized in that: be a kind of elevator traction machine that adopts flat composite band traction, it comprises successively, drg (1), rear bearing (8), support (2), traction sheave (9), main shaft (3), front bearing (7), permagnetic synchronous motor (4), protective case (6) and coder (5), wherein, the traction groove (10) that matches with composite band is arranged on the described traction sheave (9); Described traction sheave (9) directly is arranged on the main shaft (3), and both sides are also adorned solid on support (2) by front bearing (7) and the fixing formation of rear bearing (8) integral structure respectively.

2. elevator traction machine according to claim 1 is characterized in that: the diameter of described traction sheave (9) is less than or equal to 1/4th of ordinary steel rope traction sheave diameter and has realized little type heavy, and the diameter of traction sheave (9) is usually more than or equal to 80mm.

3. elevator traction machine according to claim 1, it is characterized in that: have 3～5 on the described traction sheave (9) for the traction groove (10) of placing flat composite band, the quantity of traction groove (10) is by the load-bearing decision of elevator load-carrying and composite band, and available baffle plate (11) separates between the composite band; The shape of traction groove (10) and the shape of selected composite band match.

4. elevator traction machine according to claim 1 is characterized in that: described permagnetic synchronous motor (4) is uncanned cantilever design, is fixed on a side of support (2), and the stator core of permagnetic synchronous motor (4) is exposed outside.

5. elevator traction machine according to claim 1 is characterized in that: described coder (5) is installed with the coaxial homonymy of permagnetic synchronous motor, and links to each other with permagnetic synchronous motor (4) by protective case (6).

6. elevator traction machine according to claim 1 is characterized in that: described traction sheave (9) is an arch, or flute profile, perhaps other geometry form.

7. elevator traction machine according to claim 1 is characterized in that: described drg (1) is axle braking device, is fixed on a side of support (2).