CN205301800U

CN205301800U - Underwind electric lift screen of extra -large -size

Info

Publication number: CN205301800U
Application number: CN201620034967.6U
Authority: CN
Inventors: 欧阳卫
Original assignee: Jiangsu Jiuyu Display Technology Co Ltd
Current assignee: Jiangsu Jiuyu Display Technology Co Ltd
Priority date: 2016-01-14
Filing date: 2016-01-14
Publication date: 2016-06-08
Anticipated expiration: 2026-01-14

Abstract

The utility model discloses an underwind electric lift screen of extra -large -size, its characterized in that: it includes mounting bracket, two curtains and drive arrangement, two curtain upper end fixed connection are on the mounting bracket, and the lower extreme is connected respectively on two core pipes, two cores of drive arrangement separately -driven pipe is reverse synchronous to rotate, upwards rolling curtain or expand the curtain downwards. Drive arrangement is for setting up four tubular motor at two 7 both ends of core pipe. The utility model discloses successful solution time electronic screen core setting of book pipe exceed more than 12 meters the problem because of the torsional bending one -tenth U style of calligraphy that drops naturally, make possible 50 meters of screen width size, the number of motors is increased to 4, be used for ensureing to have sufficient lift torsion and braking torsion, the circuit control system of screen has increased the motor and has damaged automated inspection, report to the police, the halt circuit, an arbitrary motor damages in the generator system, the system all can in time shut down and report to the police to the user, and safety is enhanced.

Description

A kind of underwind electric up-down screen of ultra-large type

Technical field

This utility model belongs to projection screen technical field, particularly relates to a kind of underwind electric up-down screen of ultra-large type.

Background technology

Common last volume electric screen (such as Fig. 1) primary structure is by the motor 11 on top, top steel wire coiler 12, steel wire 13, lower core pipe 14, bottom steel wire winding device 15, curtain 16 forms, bottom steel wire winding device 15 is arranged on lower core pipe 14, on the position in the level of relative direction of lower core the pipe 14 while curtain face that is fastened, the steel wire 13 while being fastened, time screen needs to rise, motor 11 drives top steel wire coiler 12 to rotate forward, steel wire 13 all from rolling bottom steel wire winding device 15 to top steel wire coiler 12 on, steel wire 13 drives lower core pipe 14 to rotate and upgrade along core pipe axle center and moves, curtain 16 encloses volume on lower core pipe 14 with regard to one, time screen needs to decline, motor 11 drives steel wire catcher to do direction and rotates, steel wire 13 all from top steel wire catcher 12 rolling to bottom steel wire catcher 15, steel wire 13 drives lower core pipe to do rotation descending motion along core pipe 14 axle center, curtain 16 encloses drops down from lower core pipe 14 with regard to one.

Under the last volume electric screen of general type, the length of core pipe not can exceed that more than 12 meters, the rigidity of the lower core pipe within 12 meters can ensure that the bending of core pipe is not serious, film screen lifting is made to smoothly complete, after 12 meters, under screen, core pipe rigidity is inadequate, under the effect being freely rotated down power, core pipe can bend to U-shaped, causes lifting, and (such as Fig. 2) is so the greatest width dimension also limiting this structure type screen can at about 12 meters. The last volume electric screen major part of general type uses double tubular motor, if wherein a motor damage can cause that another motor overburden burns, and but the braking torque of motor band itself controls the power that core pipe is rotated down not, screen quickly will be fallen to bottom dead center position from top dead centre is out of control, there is unsafe factor.

Utility model content

This utility model purpose is in that the defect for existing last volume electric screen, it is provided that a kind of screen width can reach the underwind electric up-down screen of ultra-large type of 50 meters.

This utility model for achieving the above object, adopts the following technical scheme that

A kind of underwind electric up-down screen of ultra-large type, it is characterised in that: it includes installing rack, two pieces of curtains and driving device; Described two pieces of curtain upper ends are fixedly connected on installing rack, and lower end is connected on two core pipes, and described driving device drives two core pipe reverse sync to rotate respectively, upwards rolling curtain or drops down curtain.

It is further characterized by described driving device and is arranged on two core pipe two ends.

Preferred: described driving device is four tube shaped electric machines being separately positioned on two core pipe two ends; Described two tube shaped electric machine one end being positioned at side are fixed with core pipe and are connected, and the other end passes through connecting plate for electric motor registration, and said two tube shaped electric machine rotating shaft is provided with intermeshing synchromesh gear.

Described four tube shaped electric machines are provided with the optical rotary encoder for detecting tube shaped electric machine position in one of them.

Described tube shaped electric machine is controlled by single-chip microcomputer.

Described single-chip microcomputer detects the operating current of arbitrary tube shaped electric machine by current detecting sensing circuit, and compares with the value set, and controls electric machine rotation.

Described single-chip microcomputer controls the bound site of screen by the tube shaped electric machine real-time position signal that optical rotary encoder provides.

This utility model successfully solves core pipe under last volume electric projection screen more than more than 12 meters because of the problem that tenesmus torsional bending becomes U-shaped naturally; make screen width dimensions can accomplish 50 meters; number of motors increases to 4; in order to guarantee having enough lifting torsion and brake torsion, the circuit control system of screen adds motor damage and automatically detects, and reports to the police; halt circuit; when any one motor damage in group of motors, system all can be shut down in time and report to the police to user, adds safety.

Accompanying drawing explanation

Fig. 1 is existing last volume electric screen schematic diagram.

Fig. 2 is existing last volume electric screen U-bend schematic diagram.

Fig. 3 is this utility model structural representation.

Fig. 4 is the tube shaped electric machine structural representation of side.

Fig. 5 is the tube shaped electric machine schematic diagram with optical rotary encoder.

Detailed description of the invention

A kind of underwind electric up-down screen of ultra-large type as shown in Figure 3, it includes installing rack 9, two pieces of curtains 8 and driving devices; Described two pieces of curtain 8 upper ends are fixedly connected on installing rack 9, and lower end is connected on two core pipes 7, and described driving device drives two core pipe 7 reverse sync to rotate respectively, upwards rolling curtain 8 or drops down curtain 8. Described driving device is two group of motors being arranged on two core pipe 7 two ends.

As shown in Figure 4, side group of motors is made up of two tube shaped electric machines 1, tube shaped electric machine 1 rotor-end puts runner 2, motor Phaleria macrocarpa 3 place separately adds a metal Phaleria macrocarpa, bearing is loaded after metal Phaleria macrocarpa suit synchromesh gear 4, two tube shaped electric machines 1 use bearing supporting plate 5 fixed position, motor stator uses connecting plate for electric motor 6 to lock connection and makes group of motors, group of motors is inserted in two core pipes 7 respectively, core pipe 7 is added jointing by many single pipes and combines, motor Phaleria macrocarpa 3 and runner 2 use countersunk head screw to fix with core pipe 7, the both sides of core pipe 7 are stained with two pieces of curtains 8 respectively, the top of curtain 8 uses high-frequency induction welder to weld a circle set, middle poling, then it is fixed on above the upper installing rack 9 of screen with screw rod, automatic line receiver one end on upper installing rack 9 is connected with group of motors control line, the other end connects switch board, the agent structure of screen has substantially combined, group of motors and core pipe is all used to be rigidly connected owing to employing two core pipes and core pipe two ends, wherein a core pipe bearing down achieves interlocking with another root core pipe bearing down and offsets, therefore the buckling problem of core pipe is solved, after tube shaped electric machine energising, film screen lifting realizes smoothly.

This utility model adds tube shaped electric machine quantity, if the stop using tube shaped electric machine itself cannot accomplish that 4 restraining position are consistent, adopt other limit methods, lower limit position is also less susceptible to realize, therefore this utility model has installed optical rotary encoder 10(such as Fig. 5 additional inside tube shaped electric machine 1), for Real-time Feedback position signalling to switch board. switch board is by single-chip microcomputer, touch screen, current transformer, optical rotary encoder, contactless output board forms, the restraining position up and down of screen sets on the touchscreen and revises and inputs in single-chip microcomputer after determining, single-chip microcomputer relies on the real time position that optical rotary encoder provides to control the bound site of screen, control circuit have also been devised current detection circuit, Rated motor operating current sets on the touchscreen and revises and inputs in single-chip microcomputer after determining, single-chip microcomputer relies on current transformer detection system power, when in group of motors, the work of any motor has abnormal time, current transformer detects that current anomaly sends single-chip microcomputer to immediately, the warning preset in single-chip microcomputer and shutdown procedure will start, significantly increase the safety of screen.

Claims

1. the underwind electric up-down screen of ultra-large type, it is characterised in that: it includes installing rack, two pieces of curtains and driving device; Described two pieces of curtain upper ends are fixedly connected on installing rack, and lower end is connected on two core pipes, and described driving device drives two core pipe reverse sync to rotate respectively, upwards rolling curtain or drops down curtain.

2. the underwind electric up-down screen of ultra-large type according to claim 1, it is characterised in that: described driving device is arranged on two core pipe two ends.

3. the underwind electric up-down screen of ultra-large type according to claim 2, it is characterised in that: described driving device is four tube shaped electric machines being separately positioned on two core pipe two ends; Described two tube shaped electric machine one end being positioned at side are fixed with core pipe and are connected, and the other end passes through connecting plate for electric motor registration, and said two tube shaped electric machine rotating shaft is provided with intermeshing synchromesh gear.

4. the underwind electric up-down screen of ultra-large type according to claim 3, it is characterised in that: described four tube shaped electric machines are provided with the optical rotary encoder for detecting tube shaped electric machine position in one of them.

5. the underwind electric up-down screen of ultra-large type according to claim 3 or 4, it is characterised in that: described tube shaped electric machine is controlled by single-chip microcomputer.

6. the underwind electric up-down screen of ultra-large type according to claim 5, it is characterised in that: described single-chip microcomputer detects the operating current of arbitrary tube shaped electric machine by current detecting sensing circuit, and compares with the value set, and controls electric machine rotation.

7. the underwind electric up-down screen of ultra-large type according to claim 5, it is characterised in that: described single-chip microcomputer controls the bound site of screen by the tube shaped electric machine real-time position signal that optical rotary encoder provides.