CN102285602A - Rotatable lower limit switch device for platform cranes - Google Patents
Rotatable lower limit switch device for platform cranes Download PDFInfo
- Publication number
- CN102285602A CN102285602A CN2011102233801A CN201110223380A CN102285602A CN 102285602 A CN102285602 A CN 102285602A CN 2011102233801 A CN2011102233801 A CN 2011102233801A CN 201110223380 A CN201110223380 A CN 201110223380A CN 102285602 A CN102285602 A CN 102285602A
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- Prior art keywords
- limit switch
- jib
- hinged
- bearing pin
- push rod
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Abstract
The invention discloses a rotatable lower limit switch device for platform cranes, and the device provided by the invention is characterized in that an arm support is hinged with a rotary table by a hinge pin, a push rod is arranged on the arm support, a limit switch II is arranged on the rotary table, the surface of the rotary table between the limit switch II and the hinge pin is provided with a spring compression rod barrel, one end of the spring compression rod barrel is hinged with the rotary table by virtue of a hinge pin II, the bottom of the inner cavity of the spring compression rod barrel is provided with a spring, and the port of the spring compression rod barrel is provided with a compression rod; the hinge pin is hinged with a rotary bracket, and one end of the rotary bracket is provided with a limit switch I arranged corresponding to the position of the push rod; and the position of the other end of the rotary bracket corresponds to that of the limit switch II at a certain interval, and the end of the rotary bracket is also hinged with the compression rod by virtue of a hinge pin III. The rotatable lower limit switch device disclosed by the invention has the beneficial effects of convenience in adjustment, accurate positioning, good safety, high reliability, and capability of solving the problem that the mechanism in the prior art is easy to separate to cause that the limit switch is damaged.
Description
Technical field
The invention belongs to the offshore rig technical field, relate to a kind of Platform lifting devices with rotatable lower position switch device.
Background technology
The platform loop wheel machine uses span winch (or oil cylinder) luffing, when jib is transferred to the foot of design limiting by span winch, between jib and turntable limit switch is installed, and excessively transfers to prevent jib.Lower position switch commonly used is installed on the turntable, and the installation site is fixed, and can not rotate.When the normal minimum angle that allows was transferred in jib rotation, after being installed in push rod on the jib and touching the limit switch that is installed in turntable, arm stopped to be rotated down (as 0 °).When under special circumstances, arm can continue to be rotated down (as-10 °) under controlled situation, the push rod that be installed on the jib this moment can rotate along with jib, and the limit switch that is installed in turntable can be along with rotation, because the angle of jib rotation is excessive, being installed in push rod and the limit switch that is installed in turntable on the jib has the danger of disengaging, can damage lower position switch when jib returns.
In extraordinary circumstances, when arm continued to be rotated down in the normal minimum angle that allows, last position did not have the end position switch, is easy to generate serious risk, causes a serious accident.
Summary of the invention
The purpose of this invention is to provide a kind of Platform lifting devices with rotatable lower position switch device, solved in the prior art, be installed in push rod and the limit switch unreasonable structure that is installed in turntable on the jib, be easy to generate serious risk, the problem that causes a serious accident.
The technical solution adopted in the present invention is, a kind of Platform lifting devices is with rotatable lower position switch device, jib and turntable are hinged by bearing pin, push rod is installed on jib, turntable is provided with limit switch two, and the turntable surface between limit switch two and the bearing pin is provided with the spring pressure bar tube, and an end of spring pressure bar tube is hinged by bearing pin two and turntable, spring pressure bar tube inner chamber bottom is provided with spring, and spring pressure bar tube port is provided with depression bar;
Be hinged with swinging mounting on the described bearing pin, an end of swinging mounting is equipped with and the cooresponding limit switch one in push rod position; Another tip position of swinging mounting is corresponding at interval with limit switch two, and this termination is also hinged by bearing pin three and depression bar.
Platform lifting devices of the present invention is with rotatable lower position switch device, and its feature also is: described push rod can be regulated length.
The invention has the beneficial effects as follows, easy to adjust, accurate positioning, safety is good, the reliability height.
Description of drawings
Fig. 1 is the installation site scheme drawings of apparatus of the present invention on Platform lifting devices;
To be apparatus of the present invention drop to normal minimum structural representation when allowing angle at jib to Fig. 2;
Fig. 3 is the structural representations of apparatus of the present invention when jib drops to last end position position.
Among the figure, 1. jib, 2. push rod, 3. bearing pin, 4. swinging strut, 5. limit switch one, and 6. bearing pin two, 7. spring pressure bar tube, 8. spring, 9. depression bar, 10. bearing pin three, 11. limit switches two, 12. turntables.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
With reference to Fig. 1, Fig. 2, the structure of apparatus of the present invention is that the push rod of installing on jib 12 can only be regulated length, and is incompressible.When jib 1 is rotated down when being triggered to the limit switch that is installed on the swinging strut 41, jib 1 stops to be further rotated under the effect of limit switch 1, and this moment, spring pressure bar tube 7 should be able to support the downforce of push rod 2, and swinging mounting 4 is motionless.When extraordinary circumstances (surmounting) need jib 1 continuation rotation to press down, jib 1 drives push rod 2 and is rotated down simultaneously, spring pressure bar tube 7 bounces back at this moment, swinging mounting 4 is along bearing pin 3 rotations, when reaching capacity the position, swinging mounting 4 touches limit limit switch 2 11, cuts off power, and jib 1 thoroughly can not continue rotation.
As shown in Figure 1, swinging mounting 4 is installed on the turntable 12, jib 1 is installed on the turntable 12 by bearing pin.Rotatable lower position switch comprises parts such as swinging mounting 4, limit switch 1.
As shown in Figure 2, push rod 2 is installed on jib 1, turntable 12 is provided with limit switch 2 11, on the turntable 12 between limit switch 2 11 and the bearing pin 3 spring pressure bar tube 7 is installed, one end of spring pressure bar tube 7 is hinged by bearing pin 26 and turntable 12, spring pressure bar tube 7 intracavity bottoms are provided with spring 8, and depression bar 9 is installed in the spring pressure bar tube 7; Be hinged with swinging mounting 4 on the bearing pin 3 of jib 1 and turntable 12, an end of swinging mounting 4 is equipped with and the cooresponding limit switch 1 in push rod 2 positions; Another tip position of swinging mounting 4 is corresponding at interval with limit switch 2 11, and this termination is also hinged by bearing pin 3 10 and depression bar 9.
The working process of apparatus of the present invention is, with reference to Fig. 2,
Jib 1 edge " a " is to rotation, when arriving the position of Fig. 2 when arbitrarily angled (0 ° or predefined), the push rod of installing on the jib 12 has been pushed down the limit switch 1 that is installed on the swinging strut 4, spring 8 gives depression bar 9 enough application forces this moment, prevents from triggering limit switch swinging strut 4 rotations in one 5 o'clock.Limit switch one 5 triggerings this moment, limit switch 1 sends signal (can be electricity or hydraulic pressure signal), and hydraulic efficiency pressure system stops feed system power, and jib 1 stops the rotation.
When control system is used " surmounting " function; limit switch 1 is not removed pressed status; jib 1 continues along " a " to rotation; the push rod of installing on the jib 12 withstands limit switch 1; and because the protection of swinging strut 4 adapter plates; the downforce that continues has been applied on swinging strut 4 adapter plates, has protected limit switch 1, prevents that limit switch from damaging.After the push rod of installing on the jib 2 is depressed on swinging strut 4 adapter plates, driven rotary support 4 around bearing pin 3 along " b " to rotation.3 10 times moulded rods 9 of bearing pin that be fixed together with swinging strut 4 this moment, and pressing spring 8 down.The mechanism of spring pressure bar tube 7, spring 8, depression bar 9 compositions rotates along " c " directions around bearing pin 26 simultaneously.When arriving the maximum angle of jib 1 permission (with reference to the α among Fig. 3), the other end of swinging strut 4 triggers the end position limit switch 2 11 (can be electricity or hydraulic pressure signal) that is installed on the turntable 12, this moment, hydraulic efficiency pressure system stopped feed system power, jib 1 stops the rotation, and can not realize " surmounting " again.
Get back to the position or bigger degreeof turn of Fig. 2 when jib 1 contrarotation after, spring 8 is upheld and is ejected depression bar 9, driven rotary support 4 is around " b " contrarotation of bearing pin 3 edge courts, and jib 1 is got back to level attitude shown in Figure 2 only, because the depression bar 9 that this moment, spring 8 pressed down runs to end position, can not stretch out again, guarantee that each rotatable lower position switch can get back to normal position after action.
Because swinging strut 4 is around bearing pin 3 rotations, bearing pin 3 is concentric with the S. A. of jib, and therefore, the push rod of installing on the jib 2 is depressed into limit switch 1 and when continuing to press down, contact can not break away from, and has prevented that the mechanism of prior art breaks away from the problem of damaging limit switch that causes easily.
Claims (2)
1. a Platform lifting devices is with rotatable lower position switch device, jib (1) is hinged by bearing pin (3) with turntable (12), it is characterized in that: push rod (2) is installed on jib (1), turntable (12) is provided with limit switch two (11), turntable (12) surface between limit switch two (11) and the bearing pin (3) is provided with spring pressure bar tube (7), one end of spring pressure bar tube (7) is hinged by bearing pin two (6) and turntable (12), spring pressure bar tube (7) intracavity bottom is provided with spring (8), and spring pressure bar tube (7) port is provided with depression bar (9);
Be hinged with swinging mounting (4) on the described bearing pin (3), an end of swinging mounting (4) is equipped with and the cooresponding limit switch one (5) in push rod (2) position; Another tip position of swinging mounting (4) is corresponding at interval with limit switch two (11), and this termination is also hinged by bearing pin three (10) and depression bar (9).
2. Platform lifting devices according to claim 1 is with rotatable lower position switch device, and it is characterized in that: described push rod (2) can be regulated length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110223380 CN102285602B (en) | 2011-08-05 | 2011-08-05 | Rotatable lower limit switch device for platform cranes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110223380 CN102285602B (en) | 2011-08-05 | 2011-08-05 | Rotatable lower limit switch device for platform cranes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102285602A true CN102285602A (en) | 2011-12-21 |
| CN102285602B CN102285602B (en) | 2013-11-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110223380 Expired - Fee Related CN102285602B (en) | 2011-08-05 | 2011-08-05 | Rotatable lower limit switch device for platform cranes |
Country Status (1)
| Country | Link |
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| CN (1) | CN102285602B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107399678A (en) * | 2016-05-21 | 2017-11-28 | 中船绿洲镇江船舶辅机有限公司 | Crane avoids chimney device |
| USD874082S1 (en) | 2016-08-29 | 2020-01-28 | John Rene Spronken | Crane tie-arm |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2940559C (en) | 2016-08-29 | 2017-03-21 | John Rene Spronken | Crane tie arm adjustment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201647864U (en) * | 2009-12-11 | 2010-11-24 | 三一汽车制造有限公司 | Rotary locking mechanism for crane rotary platform and crane rotary platform |
| CN201801332U (en) * | 2010-09-07 | 2011-04-20 | 甘肃兰峰建设机械制造有限责任公司 | Damping device for proving ring type weight limiter of tower crane |
| CN201809097U (en) * | 2010-08-13 | 2011-04-27 | 宝鸡石油机械有限责任公司 | Control device for lower limited positions of marine platform crane |
-
2011
- 2011-08-05 CN CN 201110223380 patent/CN102285602B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201647864U (en) * | 2009-12-11 | 2010-11-24 | 三一汽车制造有限公司 | Rotary locking mechanism for crane rotary platform and crane rotary platform |
| CN201809097U (en) * | 2010-08-13 | 2011-04-27 | 宝鸡石油机械有限责任公司 | Control device for lower limited positions of marine platform crane |
| CN201801332U (en) * | 2010-09-07 | 2011-04-20 | 甘肃兰峰建设机械制造有限责任公司 | Damping device for proving ring type weight limiter of tower crane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107399678A (en) * | 2016-05-21 | 2017-11-28 | 中船绿洲镇江船舶辅机有限公司 | Crane avoids chimney device |
| USD874082S1 (en) | 2016-08-29 | 2020-01-28 | John Rene Spronken | Crane tie-arm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102285602B (en) | 2013-11-06 |
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Granted publication date: 20131106 Termination date: 20170805 |
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| CF01 | Termination of patent right due to non-payment of annual fee |