CN202000878U - Self-locking safety device for overspeed - Google Patents
Self-locking safety device for overspeed Download PDFInfo
- Publication number
- CN202000878U CN202000878U CN201120079615XU CN201120079615U CN202000878U CN 202000878 U CN202000878 U CN 202000878U CN 201120079615X U CN201120079615X U CN 201120079615XU CN 201120079615 U CN201120079615 U CN 201120079615U CN 202000878 U CN202000878 U CN 202000878U
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- CN
- China
- Prior art keywords
- self
- locking
- safety device
- boss
- ball grooves
- Prior art date
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Abstract
Provided is a self-locking safety device for overspeed. A transmission shaft is connected with a self-locking wheel which is arranged in a chassis, the self-locking wheel is provided with a plurality of ball grooves, steel balls or steel columns are positioned in the ball grooves, and at least one locking boss is installed above the inner side of the chassis. The steel balls or the steel columns positioned in the ball grooves are matched with the locking boss and a position switch which are arranged on the chassis. When a chain is abruptly broken and the transmission shaft rotates at high speed, the steel balls or the steel columns are thrown out of the ball grooves and blocked between teeth of the ball grooves of the self-locking wheel and the locking boss. Therefore, self-locking function is realized, the position switch is triggered, and a power supply of a main machine is cut off to ensure safety. The self-locking safety device for overspeed has good safety performance, is simple and convenient to produce and install and works stably.
Description
Technical field
The utility model relates to a kind of safety device of door-rolling machine, especially for the hypervelocity self locking safety device that prevents the unexpected fracture of chain in the door-rolling machine.
Background technology
At present, anti-chain rupture safety device principle supporting on all kinds of door-rolling machines of domestic production is: rely on the braking shiifter head that is installed on the end plate to withstand the tooth root position of transmission hinge wheel, thereby stop the downslide of rolling door sheet.This structure is to the processing of component and very strict requirement is installed, because the angle requirement is arranged, has deviation just not have safety effect slightly.So often losing efficacy, this device caused security incident to take place frequently.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of hypervelocity self locking safety device, can automatically lock under the situation that power transmission shaft rotates at a high speed when chain ruptures suddenly.
For solving the problems of the technologies described above, the technical scheme that the utility model adopted is: a kind of hypervelocity self locking safety device, power transmission shaft is connected with the self-locking wheel, the self-locking wheel is installed in the base, the self-locking wheel is provided with a plurality of alleys, steel ball or steel column are installed in the alley, and the base inside front is provided with at least one locking boss.
Sideline, described alley cross section is circular arc line, involute, parabola, perhaps the combination of circular arc line, involute or parabola and straight line.
Described locking boss one side is provided with travel switch.
Described travel switch contact protrudes from the curved surface of locking boss root.
Described travel switch is a microswitch.
A kind of hypervelocity self locking safety device that the utility model provides, cooperate with locking boss and travel switch on the base by the steel ball in the self-locking wheel or steel column, rupture at chain suddenly, under the situation that power transmission shaft rotates at a high speed, steel ball or steel column throw away from alley, are stuck between the tooth and locking boss of self-locking wheel alley, thereby formation self-locking, and the triggering travel switch, cut off host power supply, guarantee safety.Easy, working stability is made in the utility model security performance height, installation.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of the utility model when normally moving.
Structural representation when Fig. 2 is the utility model self-locking.
The specific embodiment
In Fig. 1, Fig. 2, a kind of hypervelocity self locking safety device, power transmission shaft 4 is connected with the self-locking wheel, and self-locking wheel 5 is installed in the base 3, and self-locking wheel 5 is provided with a plurality of alleys 6, and steel ball 1 or steel column are installed in the alley 6, and base 3 inside fronts are provided with at least one locking boss 7.
Sideline, described alley 6 cross section is circular arc line, involute, parabola, the perhaps combination of circular arc line, involute or parabola and straight line.
Described locking boss 7 one sides are provided with travel switch 2.
Described travel switch 2 contacts protrude from the curved surface of locking boss 7 roots.
Described travel switch 2 is a microswitch.
Under the normal operating conditions, as shown in Figure 1, when power transmission shaft 4, when the axle that promptly is connected with the roller shutter door-hinge rotates, driving self-locking wheel 5 rotates, the interior normal rotation of rev limit value (being not stuck critical speed before between the locking boss 7 on steel ball 1 or steel column and the base 3), the rotating speed that the user oneself need only need select gets final product.Under normal circumstances, travel switch 2 is inoperative, is in normal open state always.
When power transmission shaft 4 rotates, driving self-locking wheel 5 rotates, when with self-locking take turns driving chain in the 5 coaxial mounted chain-drive mechanisms because of serious wear or unexpected fracture after, the roller shutter door-hinge can move fast round about, the power transmission shaft 4 that links to each other with the roller shutter door-hinge can drive self-locking wheel 5 and rotate round about fast, under moment huge action of centrifugal force, the movement locus that steel ball 1 or steel column can depart from the past outwards moves, promptly be thrown out of from alley 6, when and base 3 on locking boss 7 can be stuck in after meeting between locking boss 7 roots and the alley 6, steel ball 1 or steel column can be pushed down travel switch 2 contacts herein simultaneously, cut off host power supply rapidly, danger is broken off from the source.
After tested, emergency lock rated speed≤20r/min in the embodiment that adopts steel ball 1, emergency lock maximum torque≤600Nm, the diameter of power transmission shaft 4 are φ 35mm.
Claims (5)
1. hypervelocity self locking safety device, it is characterized in that: power transmission shaft (4) is connected with self-locking wheel (5), self-locking wheel (5) is installed in the base (3), self-locking wheel (5) is provided with a plurality of alleys (6), steel ball (1) or steel column are installed in the alley (6), and base (3) inside front is provided with at least one locking boss (7).
2. a kind of hypervelocity self locking safety device according to claim 1 is characterized in that: described alley (6) sideline, cross section is circular arc line, involute, parabola, the perhaps combination of circular arc line, involute or parabola and straight line.
3. a kind of hypervelocity self locking safety device according to claim 1 is characterized in that: described locking boss (7) one sides are provided with travel switch (2).
4. a kind of hypervelocity self locking safety device according to claim 3 is characterized in that: described travel switch (2) contact protrudes from the curved surface of locking boss (7) root.
5. according to claim 3 or 4 described a kind of hypervelocity self locking safety devices, it is characterized in that: described travel switch (2) is a microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120079615XU CN202000878U (en) | 2011-03-24 | 2011-03-24 | Self-locking safety device for overspeed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120079615XU CN202000878U (en) | 2011-03-24 | 2011-03-24 | Self-locking safety device for overspeed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202000878U true CN202000878U (en) | 2011-10-05 |
Family
ID=44703623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120079615XU Expired - Lifetime CN202000878U (en) | 2011-03-24 | 2011-03-24 | Self-locking safety device for overspeed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202000878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168519A (en) * | 2011-03-24 | 2011-08-31 | 宜昌四八二〇机电有限公司 | Overspeed self-locking safety device |
-
2011
- 2011-03-24 CN CN201120079615XU patent/CN202000878U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102168519A (en) * | 2011-03-24 | 2011-08-31 | 宜昌四八二〇机电有限公司 | Overspeed self-locking safety device |
| CN102168519B (en) * | 2011-03-24 | 2012-11-21 | 宜昌四八二〇机电有限公司 | Overspeed self-locking safety device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111005 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |