CN87209763U

CN87209763U - Auto-braking device for motor

Info

Publication number: CN87209763U
Application number: CN 87209763
Authority: CN
Inventors: 陈佑德
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-07-04
Filing date: 1987-07-04
Publication date: 1988-05-04

Abstract

The utility model discloses an auto-braking device for a motor, which is mainly composed of a planar cam mechanism and a friction brake mechanism. When the motor is energized, the brake mechanism is in release condition, and the motor can drive a working machine to run; when the motor is power-off, the brake mechanism can automatically generate brake torque, which can get the motor and the working machine fast shut down.

Description

Auto-braking device for motor

The utility model relates to a kind of check piece.

Can shut down rapidly after motor is had a power failure, braking device need be set, common has:

1. electromagnetic brake, it is partly formed by two: tractive magnet and Block brake device, block brake comprises brake shoe, brake wheel, lever and spring etc., brake wheel is contained on the shaft of motor, when motor starts, tractive magnet gets electric and inhales moving armature, thereby makes brake shoe and brake wheel separately, and at this moment motor runs well; When motor was cut off the electricity supply, the tractive magnet power supply was cut off simultaneously, so armature is released, brake shoe is embraced brake wheel, and motor is braked and shuts down like this.

2. electromagnetic braking motor, it is made up of motor and disk type electromagnetic brake.Disk type electromagnetic brake is by coiled electrical magnet, inside and outside friction brake wafer, friction plate overcoat, compositions such as interior friction plate pattern chain cover, spring.When motor started, the electromagnetic braking partly power supply of electromagnet was connected simultaneously, attracts armature, makes friction plate be in releasing state, and motor is run well; When cutting off the electricity supply, the power supply of electromagnet is cut off simultaneously, and armature imposes axial pressure to friction plate under the effect of spring pressure, and friction catch mechanism just produces retarding torque, thereby finishes the function of stopping brake.

The utility model aims to provide the more excellent motor brake device of a kind of performance.

The utility model is finished as follows: adopting between active plane cam and prime mover (referring generally to motor) axle can transmitting torque, can axially movablely cooperate again, passive face cam is assemblied on the reducer shaft, when motor is switched on, the torque of motor output produces end thrust automatically in face cam (containing active plane cam and passive face cam), the compression pressure spring makes arrestment mechanism be in releasing state, and motor just drives the working machine running; Work as supply disconnecton, when motor did not have torque output, the end thrust that is produced by face cam disappeared automatically, under the effect of pressure spring, friction plate produces retarding torque automatically to first of retarder, has promptly realized the braking to retarder and working machine.

Active plane cam endoporus can be made into spline and the motor splined shaft is slidingly matched, and active plane cam and motor reel are reached can transmitting torque and mutual axially movable function.

Passive face cam endoporus can select for use flat key and first of retarder to assemble, and makes the function that reaches transmitting torque.

The outer garden Zhou Shangke of passive face cam is processed into and the corresponding pattern chain groove of interior friction plate profile of tooth (or spline tooth), is used to install interior friction plate.

Friction plate and outside friction disc in friction plate is divided into, use the outside friction disc cover that the outside friction disc group is installed, the friction plate overcoat is processed into and the corresponding flute profile of outside friction disc profile of tooth, the friction plate overcoat can be loaded on the speed reducer by bolt and locating stud, inner radius at the friction plate overcoat can be installed single row angular contact ball bearing, is used as the location of first of retarder and bears the axial force that face cam produces.

Pressure spring can be loaded on the flange of active plane cam, can select for use thrust ball bearing to bear the axial force of pressure spring and active plane cam.

Can select for use oil sealing to separate of the oil pollution of gear reducer lube liquid to motor.

Check piece that the utility model proposes and existing motor brake device relatively have tangible progress:

1. saving electric energy.

Check piece is to utilize the effect of the torque of prime mover (as motor) output by the face cam face, automatically produce end thrust and come the compression pressure spring, friction catch mechanism is thrown off, motor is run well, it mainly is the merit that the spring of the axial pressure compression brake mechanism of face cam is done that this check piece is finished energy that one-shot consumes, its quantity is very little, thereby has remarkable energy saving effect.

2. little, in light weight, the cost of compact structure, volume is economized.

Check piece directly is installed in retarder inside to arrestment mechanism, can make full use of the spatial position of retarder; Adopt friction disc brake, the steady noise free of brake application; Adopt face cam as clutch mechanism, automatically the wearing and tearing of friction compensation braking plate.

3. be not subjected to the restriction of electrical continuous rate.

When existing electromagnetic brake was worked, the electric current that its Breake Electromagnet feeds made the electromagnetic coil heating, so will limit the water holdup of energising.Thereby limited the long-time running of machine, and do not need to add in addition the operating current of arrestment mechanism during check piece work, so be not subjected to the restriction of electrical continuous rate, can turn round continuously.

Retarding torque size with turn to irrelevant.

The profile of tooth of the face cam of check piece is towards symmetric form, so no matter the actuating cam forward or reverse all can make passive face cam push open relatively vertically equally, make arrestment mechanism be in releasing state, and during failure of current, the torque of motor output disappears, and under the pressure spring effect, same braking action can play in friction catch mechanism, so no matter how turning to of motor do not influence the size of check piece braking moment.

5. to the small-power retarder, can play safe clutch action.

When traffic overload, the active plane cam of check piece will skid on passive face cam tooth, thereby play the clutch action of the safety of protection equipment.

6. the heat that produces when braking does not directly occur in motor interior.

The friction catch mechanism and the motor body of check piece separate, and the heat that is produced by friction catch does not directly add in the motor body) help the performance of motor power (output) and effective utilization of electric energy.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.

Fig. 1 is the structure principle chart of check piece.

Fig. 2 is active plane cam structure figure.A is a plan view, and b is a left view.

Fig. 3 is passive face cam structural drawing, and C is a plan view, and D is a left view.

Fig. 4 is friction plate jacket structure figure, and E is a plan view, and F is a left view.

Fig. 5 is the pressure ring structural drawing, and G is a plan view, and H is a left view.

With reference to Fig. 1, speed reducer is made up of deceleration box 18 and case lid, and gear box cover is locked on the speed reducer 18 by locating stud 14 and bolt 17.The endoporus of active plane cam 9 is processed into spline, and (as shown in Figure 2), being slidingly matched with the splined shaft of motor, the endoporus of passive face cam 16 is assemblied on first 21 of the retarder by flat key 3; Friction plate group in being used for installing is processed into and the corresponding pattern chain groove of interior friction plate 13 profiles of tooth in the outer garden of passive face cam on week; Pressure ring 10 is fixed on the active plane cam by bolt 15, friction plate overcoat 11 is processed into and the corresponding flute profile of outside friction disc 12 profiles of tooth, be used for installing the outside friction disc group, the friction plate overcoat is loaded on the speed reducer by hexagon socket head cap screw 19 and locating stud 23, and the inner radius of friction plate overcoat is installed single row angular contact ball bearing 20 and is used for supporting first of retarder and bears the end thrust that face cam produces.Motor output end lid 5 is equipped with oil sealing 4, thrust ball bearing 6, combination butterfly flat spring 7 is installed on the flange of active plane cam, and motor is anchored on the input end of speed reducer by bolt 8, and the first order driven gear 24 of retarder is installed on second 22 of the retarder.

Among Fig. 11 is the motor single-row radial ball bearing; The 2nd, motor reel.

Claims

Check piece contains friction brake wafer, the friction plate overcoat, and pressure spring is characterized in that coming transmitting torque and producing end thrust with active plane cam and passive face cam.