CN102674187A - Load limiting hand-operated chain wheel - Google Patents
Load limiting hand-operated chain wheel Download PDFInfo
- Publication number
- CN102674187A CN102674187A CN2012101809137A CN201210180913A CN102674187A CN 102674187 A CN102674187 A CN 102674187A CN 2012101809137 A CN2012101809137 A CN 2012101809137A CN 201210180913 A CN201210180913 A CN 201210180913A CN 102674187 A CN102674187 A CN 102674187A
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- hand
- disk
- support
- protrusion
- lock nut
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Abstract
The invention discloses a load limiting hand-operated chain wheel. The chain wheel comprises a hand chain disk, a fixing mount, a support and a lock nut, wherein one end of the fixing mount is provided with a protrusion, the protrusion penetrates through a hole in the middle of the hand chain disk, one end of the support is also provided with a protrusion, the protrusion on the support penetrates through a hole in the middle of the fixing mount and extends outwards, an extending portion of the protrusion on the support is sleeved by the lock nut, the lock nut is screwed tightly, the hand chain disk rotates and drives the fixing mount, the support and the lock nut to rotate together, a friction piece is respectively placed on two sides of the hand chain disk, a spring piece is installed between the inner side of the lock nut and an end face of the fixing mount, a five-tooth long shaft which is used for installing a gear is fixed inside a hole arranged in the center of the support, and the gear pulls a weight to move up and down. When the weight of a borne object is larger than a limited load of the hand-operated chain wheel, due to the effects of friction pieces on two sides of the hand chain disk, the hand chain disk doesn't rotate. The overload of the hand-operated chain wheel without knowledge can be avoided effectively and the safety of production and operation is guaranteed.
Description
Technical field
The present invention relates to the hoisting device technical field, particularly relate to a kind of sprocket wheel that pulls of ability limit for tonnage.
Background technology
Pulling the sprocket wheel principle of work is to drop bangle wheel drive five tooth major axis with pulling chain; Drive chain hoist wheel, hoisting chain up-and-down movement through gear movement; Shortcoming is to pull the sprocket wheel rated quantity no matter whether the weight of lifting surpasses; Operating personal can both spur the weight rising of bangle wheel with lifting, and safety misadventure takes place easily.Pull sprocket wheel in use, operating personal does not often consider whether the weight that lifts by crane surpasses the chain block rated load, just begins operation, and safety misadventure takes place easily.
Summary of the invention
Technical matters to be solved by this invention is to above-mentioned defective of the prior art and a kind of limit for tonnage of design-calculated pulls sprocket wheel; This sprocket wheel that pulls increases friction lining in the both sides of bangle disk; The friction lining of both sides can stop the bangle disk to rotate when the weight weight of lifting surpasses the rated quantity that pulls sprocket wheel, pulls sprocket wheel and quits work.The present invention is simple in structure, can effectively prevent to pull sprocket wheel overload running, has guaranteed the safety of producing.
The technical matters that the present invention requires to solve can realize through following technical scheme:
A kind of limit for tonnage pulls sprocket wheel, comprises bangle disk, fixed mount, bearing, jam nut, and fixed mount one end has convexity; Said convexity is passed the hole in the middle of the bangle disk, and said bearing one end also has convexity, and the convexity on the said bearing is passed the hole in the middle of the fixed mount and stretched out; Said jam nut is enclosed within outside the part that the bearing raising stretches out, and screws, and the bangle disk rotates; Can drive fixed mount, bearing, jam nut and rotate together, the both sides of said bangle disk are placed a friction lining respectively.
Between said jam nut inboard and fixed mount end face spring leaf is housed.
Owing to adopted as above technical scheme, the present invention has following characteristics: simple in structure, can effectively prevent to pull sprocket wheel overload work under unwitting situation, and guarantee production safety.
Description of drawings
Fig. 1 is a structure exploded view of the present invention.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, the present invention includes bangle disk 1, fixed mount 2, bearing 3, jam nut 4, porose in the middle of the bangle disk 1.Fixed mount 2 one ends have convexity, and this convexity is passed the hole in the middle of the bangle disk 1.Also porose in the middle of the fixed mount 2, bearing 3 one ends also have convexity, and the convexity of bearing 3 one ends is passed the hole in the middle of the fixed mount 2 and stretched out.Jam nut 4 is locked on the part that bearing 3 stretches out.There is friction lining 5 bangle disk 1 both sides.4 of fixed mount 2 and jam nuts are equipped with spring leaf 6.Five tooth major axis that gear is used for driving the weight up-and-down movement are housed to be inserted in the hole at bearing 3 centers (figure does not look out).
During installation, according to the weight that pulls the sprocket wheel rated load, jam nut is adjusted the specified power of pulling.When drawing weight of heavy did not surpass rated load, the friction lining 5 on both sides was inoperative.In case the weight of heavy of drawing surpasses rated load, the friction lining 5 on both sides provides an oppositely directed friction force effect.Pull sprocket wheel and do not work, guaranteed the safety of personnel and equipment.
More than show and described groundwork of the present invention, principal character and advantage of the present invention.The technical personnel of the industry should be understood; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification sheets just explains principle of the present invention; The present invention also has various changes and modifications under the prerequisite that does not break away from spirit and scope of the invention, and these variations and improvement all fall in the scope of the invention that requires protection.The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (2)
1. a limit for tonnage pulls sprocket wheel, comprises bangle disk, fixed mount, bearing, jam nut, and fixed mount one end has convexity; Said convexity is passed the hole in the middle of the bangle disk, and said bearing one end also has convexity, and the convexity on the said bearing is passed the hole in the middle of the fixed mount and stretched out; Said jam nut is enclosed within outside the part that the bearing raising stretches out; And screw, the bangle disk rotates, and can drive fixed mount, bearing, jam nut and rotate together; It is characterized in that the both sides of said bangle disk are placed a friction lining respectively.
2. limit for tonnage as claimed in claim 1 pulls sprocket wheel, it is characterized in that, between said jam nut inboard and fixed mount end face spring leaf is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101809137A CN102674187A (en) | 2012-06-04 | 2012-06-04 | Load limiting hand-operated chain wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101809137A CN102674187A (en) | 2012-06-04 | 2012-06-04 | Load limiting hand-operated chain wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102674187A true CN102674187A (en) | 2012-09-19 |
Family
ID=46806836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101809137A Pending CN102674187A (en) | 2012-06-04 | 2012-06-04 | Load limiting hand-operated chain wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102674187A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2885812Y (en) * | 2006-04-17 | 2007-04-04 | 张文忠 | Overload limiter for hand-drive hoist |
| US7344121B1 (en) * | 2007-02-14 | 2008-03-18 | I-Te Pan | End surface gear-type overload protection device for manually operated hoists |
| CN202594702U (en) * | 2012-06-04 | 2012-12-12 | 安徽三雕起重机械有限公司 | Load limiting hand chain wheel |
-
2012
- 2012-06-04 CN CN2012101809137A patent/CN102674187A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2885812Y (en) * | 2006-04-17 | 2007-04-04 | 张文忠 | Overload limiter for hand-drive hoist |
| US7344121B1 (en) * | 2007-02-14 | 2008-03-18 | I-Te Pan | End surface gear-type overload protection device for manually operated hoists |
| CN202594702U (en) * | 2012-06-04 | 2012-12-12 | 安徽三雕起重机械有限公司 | Load limiting hand chain wheel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120919 |