CN102384241A - Fixed pulley device of crane - Google Patents
Fixed pulley device of crane Download PDFInfo
- Publication number
- CN102384241A CN102384241A CN2011101974638A CN201110197463A CN102384241A CN 102384241 A CN102384241 A CN 102384241A CN 2011101974638 A CN2011101974638 A CN 2011101974638A CN 201110197463 A CN201110197463 A CN 201110197463A CN 102384241 A CN102384241 A CN 102384241A
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- China
- Prior art keywords
- pulley
- scaffold
- balance arm
- shaft
- fixed pulley
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- 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.)
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Abstract
The invention discloses a fixed pulley device of a crane, belonging to the technical field of cranes. The device comprises a mounting frame, wherein the mounting frame is rotatably provided with a pulley shaft; the pulley shaft is rotatably provided with a fixed pulley, and comprises a mounting shaft and two support shafts, wherein the mounting shaft is used for mounting the fixed pulley; the two support shafts are used for supporting on the mounting frame; the two support shafts are coaxially arranged and are positioned at two sides of the mounting shaft; the support shafts and the mounting shaft are arranged eccentrically; a balance arm is arranged between the pulley shaft and the mounting frame; and one end of the balance arm is fixedly installed on the support shafts, and the other end of the balance arm is connected with the mounting frame. The device provided by the invention is not only convenient to dismount and maintain, but also the manufacturing cost is lowered, and the device is safe and reliable, and is widely applied to the production and use of the crane.
Description
Technical field
The present invention relates to the hoist technical field, relate in particular to a kind of hoist fixed pulley.
Background technique
Traditional hoist fixed pulley generally is installed in static pulley on the pulley spindle through bearing; Then pulley spindle is installed on the scaffold; Because the weight Heavy Weight that hoist lifted, in case the center of gravity of weight squints, scaffold will bear very big active force; Erecting device between pulley spindle and the scaffold will be destroyed; Cause security incident, so this mode has all proposed very high required precision to the installation of pulley and the intensity of pulley spindle scaffold, and this structure dismounting, difficult in maintenance.
Summary of the invention
Technical problem to be solved by this invention is: a kind of hoist fixed pulley is provided, and both for convenience detach, maintenance has reduced processing cost again, and safe and reliable.
For solving the problems of the technologies described above; Technological scheme of the present invention is: the hoist fixed pulley, comprise scaffold, and be rotatablely equipped with pulley spindle on the said scaffold; Be rotatablely equipped with static pulley on the said pulley spindle; Said pulley spindle comprises installation shaft and two back shafts that are used to be supported on the scaffold that are used to install said static pulley, described two coaxial settings of back shaft and be positioned at the both sides of said installation shaft, and said back shaft and installation shaft are eccentric to be provided with; Be provided with balance arm between said pulley spindle and the scaffold, said balance arm one end is fixedly installed on the said back shaft, and the other end connects said scaffold.
As a kind of improvement, be provided with electronic scale between said balance arm and the scaffold.
As further improvement, said electronics is called pull-type electronic scale.
After having adopted technique scheme; The invention has the beneficial effects as follows: because pulley spindle is designed to eccentric shaft; And pulley spindle rotates and is installed on the scaffold; Scaffold is installed on the dolly table top, compares with traditional fixed pulley, and the installation of static pulley of the present invention, dismounting and maintenance are all very convenient; Because an end of pulley spindle has designed the balance arm that is connected on the scaffold, when hoist lifting weight, the levelling weighing apparatus is rotated in the eccentric stressed meeting of pulley spindle automatically; At the equinoctial point place, there is a proportionate relationship between the suffered pulling force of pull of steel wire and balance arm, this value is definite value; It is the ratio of length with the throw of eccentric of balance arm; Usually the throw of eccentric value is between 2.5 ~ 12.5 millimeters, and then value is between 250 ~ 500 for balance arm, so the suffered pulling force of balance arm is usually less than one of percentage of lineoutofservice signal pull; Not being connected and can being destroyed by this less strength between balance arm and the scaffold improved Safety performance; It is simple that package unit is made assembly technology, and measuring accuracy is high, installation, maintenance safe convenience and time saving and energy saving, and cost performance is much higher than traditional fixed pulley.
After static pulley both sides wire rope is stressed, act on the pulley spindle, make eccentric pulley spindle have torque difference; Owing to be provided with pull-type electronic scale between balance arm and the scaffold, make this torque difference act on pull-type electronic scale, so fixed pulley can be read the pulling force that balance arm receives intuitively through balance arm; Concern according to the equalising torque between balance arm and the throw of eccentric; Can draw the suffered pulling force of wire rope, this numerical value can be set on the electronic scale, just can directly read pull of steel wire; Be convenient to learn whether hoist overloads, and has further improved the usage safety performance of hoist.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the working state figure of the embodiment of the invention;
Among the figure: 1, scaffold, 2, static pulley, 3, pulley spindle, 31, back shaft, 32, installation shaft, 4, balance arm, 5, pull-type electronic scale, 6, wire rope.
Embodiment
As shown in Figure 1; A kind of hoist fixed pulley comprises scaffold 1, is rotatablely equipped with pulley spindle 3 on the said scaffold 1; Be rotatablely equipped with static pulley 2 on the said pulley spindle 3; Said pulley spindle 3 comprises installation shaft 32 and two back shafts 31 that are used to be supported on the scaffold 1 that are used to install said static pulley 2, described two back shafts, 31 coaxial settings and be positioned at the both sides of said installation shaft 32, said back shaft 31 and installation shaft 32 eccentric settings; Be provided with balance arm 4 between said pulley spindle 3 and the scaffold 1, said balance arm 4 one ends are fixedly installed on the said back shaft 31, and the other end connects said scaffold 1.
Be provided with electronic scale between said balance arm 4 and the scaffold 1, said electronic scale is preferably pull-type electronic scale 5, and an end of pull-type electronic scale 5 is articulated on the balance arm 4, and the other end is articulated on the scaffold 1.
As shown in Figure 2, during use, in case hoist lifting weight, the levelling weighing apparatus is rotated in pulley spindle 3 stressed meetings automatically; Throw of eccentric and balance arm 4 positions relation also are unique, if the pulling force of wire rope 6 is F, the throw of eccentric between back shaft 31 and the installation shaft 32 is e; The numerical value of pull-type electronic scale 5 is Q, and the distance between pull-type electronic scale 5 and the equinoctial point is L, then according to force analysis; Can draw formula: F * e=Q * L, formula can draw wire rope 6 suffered pulling force thus.Pull-type electronic scale 5 can be set alarming value, and this alarming value is set at the ultimate bearing capacity value of wire rope 6 usually, if reach this numerical value, pull-type electronic scale 5 is reported to the police, alert, and overload crane lifts this weight and has potential safety hazard.
The present invention is not limited to above-mentioned concrete mode of execution, and those of ordinary skill in the art is from above-mentioned design, and without performing creative labour, all conversion of having done all drop within protection scope of the present invention.
Claims (3)
1. hoist fixed pulley; Comprise scaffold; Be rotatablely equipped with pulley spindle on the said scaffold, be rotatablely equipped with static pulley on the said pulley spindle, it is characterized in that: said pulley spindle comprises installation shaft and two back shafts that are used to be supported on the scaffold that are used to install said static pulley; Described two coaxial settings of back shaft and be positioned at the both sides of said installation shaft, said back shaft and installation shaft are eccentric to be provided with; Be provided with balance arm between said pulley spindle and the scaffold, said balance arm one end is fixedly installed on the said back shaft, and the other end connects said scaffold.
2. hoist fixed pulley as claimed in claim 1 is characterized in that: be provided with electronic scale between said balance arm and the scaffold.
3. hoist fixed pulley as claimed in claim 2 is characterized in that: said electronics is called pull-type electronic scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101974638A CN102384241A (en) | 2011-07-14 | 2011-07-14 | Fixed pulley device of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101974638A CN102384241A (en) | 2011-07-14 | 2011-07-14 | Fixed pulley device of crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102384241A true CN102384241A (en) | 2012-03-21 |
Family
ID=45823936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101974638A Pending CN102384241A (en) | 2011-07-14 | 2011-07-14 | Fixed pulley device of crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102384241A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB385601A (en) * | 1931-03-26 | 1932-12-28 | Alfred William Farnsworth | Improvements in jib cranes, derricks and the like |
| GB389929A (en) * | 1931-12-17 | 1933-03-30 | Arthur Mort | Improvements in or relating to cranes and like lifting devices |
| DE896550C (en) * | 1951-04-10 | 1953-11-12 | Demag Baggerfabrik G M B H | Crane with boom that can be adjusted by a cable |
| CN2373426Y (en) * | 1999-08-10 | 2000-04-12 | 田焜 | Weight limitter for hoister |
| CN2442981Y (en) * | 2000-10-05 | 2001-08-15 | 吴文发 | Balanced pulley eccentric sensor |
| CN202176690U (en) * | 2011-07-14 | 2012-03-28 | 山起重型机械股份公司 | Crane fixed pulley device |
-
2011
- 2011-07-14 CN CN2011101974638A patent/CN102384241A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB385601A (en) * | 1931-03-26 | 1932-12-28 | Alfred William Farnsworth | Improvements in jib cranes, derricks and the like |
| GB389929A (en) * | 1931-12-17 | 1933-03-30 | Arthur Mort | Improvements in or relating to cranes and like lifting devices |
| DE896550C (en) * | 1951-04-10 | 1953-11-12 | Demag Baggerfabrik G M B H | Crane with boom that can be adjusted by a cable |
| CN2373426Y (en) * | 1999-08-10 | 2000-04-12 | 田焜 | Weight limitter for hoister |
| CN2442981Y (en) * | 2000-10-05 | 2001-08-15 | 吴文发 | Balanced pulley eccentric sensor |
| CN202176690U (en) * | 2011-07-14 | 2012-03-28 | 山起重型机械股份公司 | Crane fixed pulley device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120321 |