CN202493213U

CN202493213U - Anti-falling device of novel rolling door

Info

Publication number: CN202493213U
Application number: CN2011205034608U
Authority: CN
Inventors: 陈菁
Original assignee: ZHANGZHOU CHANGTAI NEW QILIN MACHINE CO Ltd
Current assignee: ZHANGZHOU CHANGTAI NEW QILIN MACHINE CO Ltd
Priority date: 2011-12-07
Filing date: 2011-12-07
Publication date: 2012-10-17
Anticipated expiration: 2021-12-07

Abstract

The utility model provides an anti-falling device of a novel rolling door. The device is disposed on one end of a scroll opposite to the rolling door, and comprises a ratchet wheel fixedly disposed on the scroll, a roller pin, and a bearing seat of the scroll. The roller pin is disposed between two adjacent ratchet teeth of the ratchet wheel. A position-restricted arc-shaped surface of the roller pin is disposed on a top end of each ratchet wheel tooth of the ratchet wheel on a reversing directional surface of the rotation direction of the ratchet wheel. The connection part between the position-restricted arc-shaped surface and the reversing directional surface is provided with an inflection point, which can be used for the unidirectional position restriction of the roller pin falling on the position-restricted arc-shaped surface. The bearing seat is provided with a ratchet chamber of the ratchet wheel, and one roller pin position-restricted part or more than one roller pin position-restricted parts are disposed in the ratchet chamber. When a connection line of the inflection point and a point of the position-restricted parts closest to a center of a circle of the ratchet wheel passes the center of the circle of the ratchet wheel during the rotation of the inflection point, the distance between the point of the position-restricted parts closest to a center of a circle of the ratchet wheel and the inflection point is smaller than the diameter of the roller pin. In the utility model, the anti-falling device is disposed on the end of the scroll opposite to the motor for the first time, the prejudices of traditional technologies can be overcome, and the mechanical faults caused by the overconcentration of core mechanical parts, which can be actually prevented, can be effectively reduced, in addition, the maintenance costs can be greatly reduced.

Description

A kind of falling proof device of novel rolling door

Technical field

This novel falling proof device that relates generally to a kind of novel rolling door.

Background technology

Traditional falling proof device is installed in rolling door motor homonymy, and motor is implemented direct braking action, when gear or driving chain damaged but practical work is taken in, the spool of roller shutter institute spooling no longer received drive of motor, the motion mutually noninterfere between phase person.Another is convenient; The end that motor is installed is a door-rolling machine power core, and 90% functional unit is installed in this side, so installing space is limited; Even if the transformation partial structure also can be led one and started whole body; Promptly can influence whole industrial design, so improvement cost is high, and in off working state unnecessary mechanical breakdown takes place easily.

Summary of the invention

This novel purpose is to provide a kind of cost of production, maintenance cost low, the falling proof device of the novel rolling door that job stability is strong.

For realizing the foregoing invention purpose, the technical scheme of the utility model is:

A kind of falling proof device of novel rolling door, it is installed in the other end of relative door-rolling machine on the spool.

It comprises that one is fixedly arranged on the bearing support of ratchet, needle roller and the spool of spool; Said needle roller is placed between two adjacent hook tooths of ratchet; The top of the hook tooth of said ratchet on the contrary direction face that ratchet rotates is provided with the spacing cambered surface of needle roller, and said spacing cambered surface is provided with flex point with the junction of contrary direction face, and needle roller carries out unidirectional spacing in the spacing cambered surface to dropping on through this flex point; Said bearing support is provided with the ratchet chamber that ratchet is installed; Said ratchet is indoor to be provided with one or more needle roller limiting section; When flex point went to line with limiting section nearest point from the ratchet center of circle through the ratchet center of circle, the point that limiting section is nearest from the ratchet center of circle and the distance of flex point were less than the diameter of needle roller.

The distance in the ratchet center of circle is arrived in the said needle roller center of circle less than the hook tooth summit to the minimum range in the ratchet center of circle.

Said needle roller satisfies: when the needle roller center of circle to the distance in the ratchet center of circle hour, leave the ratchet center of circle nearest point and the distance in the ratchet center of circle to the distance in the ratchet center of circle less than limiting section from ratchet center of circle point farthest on the needle roller.

The center of circle with ratchet is a round dot, is the y direction of principal axis with positive north, sets up coordinate system with due east for the x direction of principal axis, and said limiting section is installed in first quartile and the four-quadrant.

Said limiting section is installed in the first quartile.

The usefulness of technique scheme is:

This novel said falling proof device is installed in the other end of relative motor on the spool first, not only overcomes the prejudice of conventional art, and effectively reduces core mechanical components because of too concentrating the evitable mechanism-trouble of basis that causes, and reduces maintenance cost simultaneously greatly.

Below in conjunction with accompanying drawing and specific embodiment to this novel being further described.

Description of drawings

Fig. 1 is the sketch map of embodiment 1;

Fig. 2 is Fig. 1 A-A direction sectional view;

Fig. 3 is the sketch map of this novel ratchet and mandrel thereof;

Fig. 4 is Fig. 3 B-B direction sectional view;

Fig. 5 is the work sketch map of ratchet and ratchet chamber;

Fig. 6 is the partial enlarged drawing of limiting section.

The specific embodiment

As shown in Figure 1, the counterclockwise spooling of a kind of door curtain of novel door-rolling machine is on spool 1, and the other end of relative motor is installed with ratchet mandrel 11 with one heart through gripper shoe 12 on the spool 1, and said mandrel 11 is rotatably installed on the bearing support 4 through bearing 41 and shaft block ring 43; Said falling proof device comprises the ratchet chamber 42 in ratchet 2, needle roller 3 and the bearing support 4 that is fixedly arranged on spool 1.

Needle roller 3 as shown in Figure 2 is placed between two adjacent hook tooths of ratchet 2; The top of the hook tooth of said ratchet 2 on the contrary direction face 21 that ratchet rotates is provided with the spacing cambered surface 22 of needle roller 3; Said spacing cambered surface 22 is provided with flex point 23 with the junction of contrary direction face 21, and drops on spacing cambered surface 22 interior needle rollers 3 through 23 pairs of this flex points and carry out unidirectional spacing;

As being provided with a needle roller limiting section 5 in Fig. 1, the ratchet chamber 42 shown in Figure 5, and satisfy:

1. when flex point 23 goes to line with the limiting section 5 nearest point 51 from ratchet 2 centers of circle through ratchet 2 centers of circle, the distance L 1 of limiting section 5 point 51 nearest from ratchet 2 centers of circle and flex point is less than the diameter d of needle roller 3;

When needle roller 3 centers of circle to the distance in ratchet 2 centers of circle hour, on the needle roller 3 from ratchet 2 centers of circle point farthest to the distance B 1 in ratchet 2 centers of circle less than the limiting section point 51 nearest and the distance B 2 in ratchet 2 centers of circle from ratchet 2 centers of circle; The distance in ratchet 2 centers of circle is arrived in the preferred needle roller of present embodiment 3 centers of circle less than the hook tooth summit to the minimum range in ratchet 2 centers of circle;

3. the center of circle with ratchet is a round dot, is the y direction of principal axis with positive north, sets up coordinate system with due east for the x direction of principal axis, and said limiting section 5 is installed in first quartile and the four-quadrant, and present embodiment is preferably installed limiting section 5 in first quartile;

4. ratchet chamber 42 is from the diameter d of hook tooth minimum distance D3 less than needle roller 3.

Also be provided with the slide rail 44 of needle roller 3 before the ratchet chamber 42 inherent limiting sections 5 as shown in Figure 1.

Operating principle:

The counterclockwise spooling of door curtain is on spool 1, so door curtain is when descending, and spool 1 drives mandrel 11 and clockwise rotates; Ratchet mandrel 11 also drives needle roller 3 with spool 1 revolution, and because of leaving the diameter of hook tooth minimum distance less than needle roller 3 in ratchet chamber 42, promptly needle roller 3 can not break away between two hook tooths of place in the spatial constraints of hook tooth and ratchet chamber 42 all the time; When normal low speed was moved, needle roller 3 fell into the lowest part between two ratchets of ratchet 2 according to own wt when through second quadrant, therefore when needle roller 3 during with mandrel 11 to first quartile, can not run into the interior limiting section 5 in ratchet chamber 42; When disconnected or driven wheel wearing and tearing etc. caused spool 11 idle running when chain, door curtain pulling spool 11 high speed up times were rotated, and needle roller 3 leans on the inwall of ratchet chamber 42 because of centrifugal force all the time; When through second quadrant; Needle roller 3 rolls along slide rail 44, because of condition 1, condition 2, the condition 3 of above-mentioned ratchet chamber 42, when making needle roller 3 through first quartile; Must strike on the limiting section 5; Receive the restriction of spacing cambered surface 22, flex point 23 and ratchet chamber 42 inwalls simultaneously, and stop mandrel 11 to be rotated further, reach the effect of braking then.

This is novel in order to improve the fall arrest function, avoids possibly making mandrel 11 bounce-backs (counter-rotating) when needle roller 3 bump limiting sections 5; And needle roller 3 falls go back to the bottom-valley between hook tooth again; Then lose braking function, this novel embodiment 1 needle roller buffer that also proposes is promptly established an elastic device between the bottom-valley between needle roller 3 and hook tooth; Like spring, and satisfy:

1, as shown in Figure 6: the length L 2 of spring when zero load and needle roller 3 diameter D sums are greater than L3; Said L3 when going to line with limiting section 5 nearest point when flex point 23 through ratchet 2 centers of circle from ratchet 2 centers of circle, limiting section 5 leave ratchet 2 centers of circle nearest o'clock to the distance of nadir S between two ratchets;

2,It is as shown in Figure 6: when needle roller 3 moves to the relevant position of limiting section 5; Needle roller 3 when the Spring balanced of the component of respective radii direction and spring, the length L 4 of spring and needle roller 3 diameter D sums less than limiting section nearest from the ratchet center of circle o'clock to the distance L 3 of nadir S between two ratchets.

Claims

1. the falling proof device of a novel rolling door is characterized in that: it is installed on the spool other end of door-rolling machine relatively.

2. the falling proof device of a kind of novel rolling door as claimed in claim 1, it is characterized in that: it comprises that one is fixedly arranged on the bearing support of ratchet, needle roller and the spool of spool; Said needle roller is placed between two adjacent hook tooths of ratchet; The top of the hook tooth of said ratchet on the contrary direction face that ratchet rotates is provided with the spacing cambered surface of needle roller, and said spacing cambered surface is provided with flex point with the junction of contrary direction face, and needle roller carries out unidirectional spacing in the spacing cambered surface to dropping on through this flex point; Said bearing support is provided with the ratchet chamber that ratchet is installed; Said ratchet is indoor to be provided with one or more needle roller limiting section; When flex point went to line with limiting section nearest point from the ratchet center of circle through the ratchet center of circle, the point that limiting section is nearest from the ratchet center of circle and the distance of flex point were less than the diameter of needle roller.

3. the falling proof device of a kind of novel rolling door as claimed in claim 2 is characterized in that: the said needle roller center of circle to the minimum range in the ratchet center of circle less than the distance of hook tooth summit to the ratchet center of circle.

4. the falling proof device of a kind of novel rolling door as claimed in claim 2; It is characterized in that: said needle roller satisfies: when the needle roller center of circle to the distance in the ratchet center of circle hour, leave the ratchet center of circle nearest point and the distance in the ratchet center of circle to the distance in the ratchet center of circle less than limiting section from ratchet center of circle point farthest on the needle roller.

5. the falling proof device of a kind of novel rolling door as claimed in claim 2, it is characterized in that: the center of circle with ratchet is a round dot, is the y direction of principal axis with positive north, sets up coordinate system with due east for the x direction of principal axis, and said limiting section is installed in first quartile and the four-quadrant.

6. the falling proof device of a kind of novel rolling door as claimed in claim 5, it is characterized in that: said limiting section is installed in the first quartile.