CN210034335U - Special ratchet wheel for safety brake of rolling gate - Google Patents
Special ratchet wheel for safety brake of rolling gate Download PDFInfo
- Publication number
- CN210034335U CN210034335U CN201920864191.4U CN201920864191U CN210034335U CN 210034335 U CN210034335 U CN 210034335U CN 201920864191 U CN201920864191 U CN 201920864191U CN 210034335 U CN210034335 U CN 210034335U
- Authority
- CN
- China
- Prior art keywords
- ratchet wheel
- ratchet
- wheel body
- brake
- chain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Abstract
The utility model relates to a special ratchet wheel for the safety brake of a rolling gate, which comprises a circular ratchet wheel body, wherein the outer ring of the ratchet wheel body is provided with ratchets; the inner ring of the ratchet wheel body is fixedly provided with a brake ring, and the ratchet wheel body and the brake ring are divided into two halves and fastened into a whole through screws. Will the utility model discloses install on the reel of shutter door, use with the pawl cooperation, not only can take place to take off the chain or under the condition of chain rupture at drive chain, prevent that the door curtain of shutter door from falling fast, and can reduce the impact to the ratchet, repeatedly usable.
Description
Technical Field
The utility model relates to a shutter door technical field especially relates to a special ratchet of shutter door safety brake.
Background
The electric rolling gate is widely applied to places such as storefronts, garages, markets and the like, and generally, a rolling door machine drives a scroll to rotate through a chain transmission mechanism, a winding drum arranged outside the scroll rotates along with the scroll, and a door curtain wound on the winding drum is driven to slide up and down along door curtain guide rails on two sides of a door opening to open and close the door. After a period of time of use, the transmission chain of the chain transmission mechanism can be worn out and loosened due to fatigue, chain dropping and chain breaking can be caused frequently, once the chain dropping or chain breaking occurs, the door curtain can fall down under the action of self gravity, the door curtain can be damaged, and serious potential safety hazards can be caused.
The utility model with application number of CN201720468736.0 discloses an auxiliary brake device for a rolling door, which comprises a support plate, a scroll and a winding drum; the support plates are respectively arranged on the wall bodies on two sides above the door opening, two ends of the scroll are rotationally connected with the support plates, and the winding drum is sleeved outside the scroll and fixedly connected with the scroll; the method is characterized in that: the device also comprises a ball throwing tension spring, a ball throwing, a ratchet wheel, a sleeve, a guide rod, a pawl baffle, a guide rod spring, a trigger plate and a connecting rod; one end of the ball throwing tension spring is connected with the scroll, and the other end of the ball throwing tension spring is connected with a ball throwing; the ratchet wheel is fixedly arranged on the scroll; the sleeve is arranged above one side of the ratchet wheel and fixedly connected with the support plate, the guide rod penetrates through the sleeve and is in sliding connection with the guide rod, the pawl is arranged in the sleeve at the lower end of the guide rod, and the claw tip of the pawl is positioned above the ratchet of the ratchet wheel; one end of the pawl baffle transversely penetrates into the lower part of the sleeve to be connected with the sleeve in a sliding manner, and the other end of the pawl baffle is positioned outside the sleeve; the guide rod spring is sleeved outside the guide rod and arranged in the sleeve, one end of the guide rod spring pushes the upper end of the sleeve, and the other end of the guide rod spring pushes the pawl downwards to enable the pawl tip of the pawl to be pressed on the pawl baffle; the trigger plate is transversely arranged above the throwing ball, one end of the trigger plate is hinged to the support plate, the other end of the trigger plate is hinged to one end of the connecting rod, and the other end of the connecting rod is hinged to one end, located outside the sleeve, of the pawl baffle. "
This technical scheme can prevent that the door curtain from falling down under the condition of drive chain emergence chain-off or chain-breaking. However, according to the technical scheme, the ratchet wheel is prevented from rotating by inserting the pawl into the space between the two ratchet teeth, the ratchet wheel and the winding drum are stopped from rotating instantly by the mode, the impact force on the pawl and the ratchet teeth is large, the pawl and the ratchet teeth are broken frequently, and the pawl and the ratchet wheel are scrapped and cannot be reused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a special ratchet of shutter door safety brake installs it on the reel of shutter door, uses with the pawl cooperation, not only can take place to take off the chain or under the condition of chain rupture at drive chain, prevents that the door curtain of shutter door from falling fast, and can reduce the impact to the ratchet, repeatedly usable.
The utility model discloses a realize through following technical scheme: a special ratchet wheel for the safety brake of a rolling gate comprises a circular ratchet wheel body, wherein ratchets are arranged on the outer ring of the ratchet wheel body; the inner ring of the ratchet wheel body is fixedly provided with a brake ring, and the ratchet wheel body and the brake ring are divided into two halves and fastened into a whole through screws.
Preferably, the inner ring of the brake ring is tightly matched with the winding drum of the rolling door.
The utility model has the advantages that: compared with the prior art, the utility model discloses inner circle at the ratchet sets up the brake ring, falls into ratchet and brake ring two halves to become an organic whole through the screw-up, will the utility model discloses install on the reel of shutter door rather than the tight fit, when the claw point ejection of pawl makes the ratchet stall at the ratchet root, make the reel stall gradually through the friction of brake ring to the reel, its brake force is comparatively gentle, can make the rotational speed of reel reduce gradually until stopping, has overcome prior art and has made the reel stall mode in the twinkling of an eye, the utility model discloses not only can take place to take off the chain or under the condition of chain rupture at drive chain, prevent that the door curtain from falling fast, can also reduce the impact to pawl and ratchet, can not cause pawl and ratchet fracture, ability used repeatedly.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an exploded schematic view of the ratchet of the present invention.
In the figure: ratchet body 1, ratchet 2, brake ring 3, screw 4.
Detailed Description
As shown in fig. 1-2, an embodiment of the present invention is a ratchet wheel special for a safety brake of a rolling gate, including a circular ratchet wheel body 1, wherein ratchets 2 are arranged on an outer ring of the ratchet wheel body 1; the inner ring of the ratchet wheel body 1 is fixedly provided with a brake ring 3, and the ratchet wheel body 1 and the brake ring 3 are divided into two halves and fastened into a whole through a screw 4.
In this embodiment, the inner ring of the brake ring 3 is tightly fitted with the winding drum of the rolling shutter door.
The working principle is as follows: during the use, install this embodiment on the reel of shutter door rather than tight fit, when the drive chain of shutter door takes place to take place to break a chain or chain-breaking, cause the door curtain of shutter door to fall fast, the reel rotational speed that drives the shutter door improves rapidly, trigger the action of the safety brake device of shutter door, the claw point of the pawl of safety brake device pushes up at 2 roots of ratchet, make the ratchet stall, the braking ring 3 of ratchet inner circle produces violent friction with the reel, prevent the reel to continue to rotate, the rotational speed of reel can reduce rapidly until stopping completely rotating, thereby make the door curtain stop falling down.
Compared with the prior art, the utility model discloses inner circle at the ratchet sets up brake ring 3, falls into ratchet and brake ring 3 two halves, and fasten into an organic whole through screw 4, will the utility model discloses install on the reel of shutter door rather than the tight fit, when the claw point ejection of pawl makes the ratchet stall at 2 roots of ratchet, make the reel stall gradually through brake ring 3 to the friction of reel, its brake force is comparatively gentle, can make the rotational speed of reel reduce gradually until stopping, has overcome prior art and has made the reel stall mode in the twinkling of an eye, the utility model discloses not only can take place to take off the chain or under the condition of chain rupture at drive chain, prevent that the door curtain from falling fast, can also reduce the impact to pawl and ratchet 2, can not cause pawl and 2 fracture of ratchet, ability used repeatedly.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention.
Claims (2)
1. A special ratchet wheel for the safety brake of a rolling gate comprises a circular ratchet wheel body, wherein ratchets are arranged on the outer ring of the ratchet wheel body; the method is characterized in that: the inner ring of the ratchet wheel body is fixedly provided with a brake ring, and the ratchet wheel body and the brake ring are divided into two halves and fastened into a whole through screws.
2. The special ratchet wheel for the safety brake of the rolling door as claimed in claim 1, wherein: the inner ring of the brake ring is tightly matched with a winding drum of the rolling gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920864191.4U CN210034335U (en) | 2019-06-11 | 2019-06-11 | Special ratchet wheel for safety brake of rolling gate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920864191.4U CN210034335U (en) | 2019-06-11 | 2019-06-11 | Special ratchet wheel for safety brake of rolling gate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210034335U true CN210034335U (en) | 2020-02-07 |
Family
ID=69347298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920864191.4U Expired - Fee Related CN210034335U (en) | 2019-06-11 | 2019-06-11 | Special ratchet wheel for safety brake of rolling gate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210034335U (en) |
-
2019
- 2019-06-11 CN CN201920864191.4U patent/CN210034335U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110885008B (en) | Buffering type speed difference falling protector | |
| CN107007952A (en) | A kind of speed difference automatic controller of the overall deliverance apparatus of band | |
| CN210034335U (en) | Special ratchet wheel for safety brake of rolling gate | |
| CN202096151U (en) | Safety device for window cleaning robot | |
| CN102052438A (en) | Gear drive structure with function of overload protection | |
| CN201174475Y (en) | Power wire coiler | |
| CN104695493A (en) | Rake tooth directional rotating and resetting method of rolling rake loading and digging machine and rake tooth directional rotating and resetting rolling rake loading and digging machine implementing same | |
| CN202689644U (en) | Safety protection device for three-dimensional parking garage | |
| CN210343192U (en) | Rolling gate with safety brake device | |
| CN204434020U (en) | Ultra-Low Speed Anti-falling safety device for construction lift | |
| CN209242388U (en) | Banding automatically retracts device | |
| CN211370245U (en) | Anti-falling curtain safety device for electric rolling curtain door | |
| CN205758444U (en) | Centrifugal brake | |
| CN107829669B (en) | Manual door opening system of roller shutter door motor | |
| CN103030080B (en) | Anti-falling lifting device | |
| CN211971615U (en) | Brake device of soil lifting machine | |
| CN211081641U (en) | Anti-falling curtain electric rolling door | |
| CN103104185B (en) | A kind of door-rolling machine chain broken prevention is stopped tight device | |
| CN204569060U (en) | One automatically resets anti-falling safety device | |
| CN202315019U (en) | Speed difference automatic controller | |
| CN109179096A (en) | Banding automatically retracts device | |
| CN206753467U (en) | A kind of rolling screen door auxiliary brake | |
| CN206915589U (en) | A kind of electric guide plate mechanism | |
| CN203237967U (en) | Fall-preventing lifting device | |
| CN201136748Y (en) | Electric hoist with mechanical anti kickback attachment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200207 Termination date: 20210611 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |