CN2136824Y - Operational moment limiter for hoist - Google Patents
Operational moment limiter for hoist Download PDFInfo
- Publication number
- CN2136824Y CN2136824Y CN 92211495 CN92211495U CN2136824Y CN 2136824 Y CN2136824 Y CN 2136824Y CN 92211495 CN92211495 CN 92211495 CN 92211495 U CN92211495 U CN 92211495U CN 2136824 Y CN2136824 Y CN 2136824Y
- Authority
- CN
- China
- Prior art keywords
- moment
- slide
- slide rule
- luffing
- guide groove
- 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
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Abstract
The utility model discloses an operational force moment limiter for hoist which is a safety device for the hoist. While in use, a middle shaft is adopted to make three slide rulers stack together, and the one ends of the three slide rulers are provided with guide grooves; a limit switch is installed on the body case of the moving direction of the force moment slide ruler; an amplitude slide ruler is connected with a nut; the nut is sheathed on a screw rod; the top part of the force rod slide ruler is connected with a gravity axis, and the gravity axis is provided with a pulley wheel. When the heavy goods is lifted, the wire ropes oppress the pulley wheel to drive the force rod slide ruler to turn, so the force moment slide ruler can move; when the stated force moment is exceeded, the force moment slide ruler can touch with the limit switch, so the signal can be sent out and the power source can be cut off. The utility model has simple structure and high sensitivity. The utility model is suitable for various horizontal luffing type hoists.
Description
The utility model belongs to the safety guard of tower crane.
At present, the limiter of moment of using on tower crane mainly contains two kinds, and a kind of is electronic type, though use sensitive, but price is more expensive, environmental conditions is had relatively high expectations, because the open work of tower machine, temperature humidity changes greatly, and electronic component is fragile malfunctioning, influences result of use; Another kind is a mechanical type, and mechanical type is divided into two types again: the one, and utilize the former distortion that moment is limited, because former distortion overfrequency easily causes former fatigue, desensitization; The 2nd, utilize the rotating curve plate that moment is limited, because its structure more complicated is made the accuracy requirement height, installation and processing is difficulty relatively, its sensitivity also is under some influence.
The purpose of this utility model just is to provide multi-functional, the highly sensitive safety guard of a kind of suitable level luffing tower machine moment, weight and amplitude integrated protection.
The utility model mainly is made up of moment slide rule, power bar slide rule and luffing slide rule etc.Moment slide rule one end has guide groove, the other end is fixed on the perpendicular slide shaft, slide shaft can move axially under the drive of moment slide rule, slide shaft links to each other with the moment telltale by tightrope, on the housing of moment slide rule moving direction, the moment limit switch is housed, and when the moment slide rule moved to assigned position, the moment slide rule can touch the moment limit switch.The calibrated disc of trough of belt is housed on the moment display casing, and the pointer clamp is indicated moment at an end of tightrope.The luffing slide rule is installed with the moment slide rule is vertical, and an end has guide groove, and the other end is being fixed hole seat with holes, and polished rod one end is with the luffing spring, passes the hole of hole seat, is fixed on the both sides of housing, and the luffing slide rule can move axially along polished rod.Nut top is a circular hole, be through on the polished rod, the bottom is a screw hole, be enclosed within on the screw mandrel, screw mandrel is parallel with polished rod, and screw mandrel one end joins by flexible axle and luffing winch, nut top is the inclined-plane collision block, on the corresponding housing luffing limit switch being housed with it, when the luffing slide rule moves to the two ends assigned position, can touch the luffing limit switch.One end of power bar slide rule is connected on the housing, the other end has guide groove, and tween drive shaft passes the guide groove of three slide rules successively, with its folded connecting together, tween drive shaft can move along guide groove, the power bar slide rule guide groove top anchor shaft of pegging graft, anchor shaft is fixed on the gravity axis, and gravity axis and slide shaft are installed in parallel on the housing with the corresponding opposite side of slide shaft, pulley is equipped with at the gravity axis top, steel rope is pressed on the pulley, and afterbody is equipped with gravity spring, and its length is regulated by nut.When promoting weight; steel rope compressing pulley; driving gravity axis shifts out corresponding distance and compresses gravity spring along resultant direction; the anchor shaft drive bar slide rule that is fixed on the gravity axis is turned back to corresponding oblique angle; be through the interior tween drive shaft of guide groove in the guide groove of moment slide rule; according to the mutually cross of power bar slide rule with each autokinesis of luffing slide rule; stirring the moment slide rule moves along the axial direction of slide shaft; slide shaft drives the pointer of moment telltale by tightrope; show moment, when surpassing regulation moment, the moment slide rule touches the moment limit switch; send and report to the police and shutdown signal, and cut off the electricity supply automatically.When weight is mobile as required; the luffing winch drives screw mandrel by flexible axle and rotates; the nut that is enclosed within on the screw mandrel moves the relevant position; when overshoot moment, nut promotes the luffing slide rule and moves on polished rod, and has compressed the luffing spring; at this moment tween drive shaft is with the inclined-plane of putting forth effort the bar slide rule; drive the moment slide rule and move, and touch the moment limit switch, send and report to the police and shutdown signal.When the luffing sport car was gone to the end position at arm two ends, the collision block on the nut touched the luffing limit switch, sent and reported to the police and stop signal, and cut off the electricity supply automatically, carried out the luffing protection.
The utility model is compared with existing limiter of moment; it is accurate to have computing; rational in infrastructure, the accuracy rate height, conservative factor is big; protection domain is wide; stable and reliable operation, sensitivity is good, characteristics such as economy and durability; the integrated protection of practicable moment, luffing and hoisting capacity is applicable on 16 tons of rice to 80 ton rice level luffing tower machine and uses.
Accompanying drawing 1 is an arithmetic expression tower machine limiter of moment structural representation.
Accompanying drawing 2 is a moment display device structure scheme drawing.
1, steel rope 2, moment telltale
3, tightrope 4, moment limit switch
5, moment slide rule 6, slide shaft
7, power bar slide rule 8, luffing slide rule
9, nut 10, luffing limit switch
11, screw mandrel 12, luffing spring
13, polished rod 14, housing
15, nut 16, gravity spring
17, tween drive shaft 18, anchor shaft
19, gravity axis 20, pulley
21, calibrated disc 22, pointer
23, shell
Embodiment:
The contrast accompanying drawing is explained in detail arithmetic expression tower machine limiter of moment below.
The housing 14 of limiter of moment is cylinder iron made rectangle, and specification is 305 * 300 * 100mm, in adorn three slide rules that are coupled to each other.Moment slide rule 5 specifications are 122 * 16 * 4mm, make with band steel, have the guide groove of 8 * 85mm in the middle of the end, and the other end is fixed on the perpendicular anchor shaft 6, and the top has the collision block of strip; On the housing 14 of moment slide rule 5 moving directions, moment limit switch 4 corresponding with rectangular collision block and in line is housed; The slide shaft specification is ∮ 15 * 145mm, is contained in two concentric holes on the housing 14, and the end links to each other with moment telltale 2 by tightrope 3.Moment telltale 2 specifications are 160 * 60 * 40mm, form by shell 23 and calibrated disc 21, pointer 22, calibrated disc 21 usefulness 1.5mm aluminium sheets are made, the centre has guide groove, be fixed on the shell 23, pointer 22 clamps move in the guide groove of calibrated disc 21 in the end of tightrope 3, the moment of indication tower machine.
Luffing slide rule 8 is made up of hole seat and slide rule, slide rule is made with the band steel of 180 * 16 * 4mm, the centre has the guide groove of 8 * 62mm, the hole seat is cylinder iron made, specification is 30 * 20 * 20mm, have the circular hole of ∮ 12mm on the seat of hole, be enclosed within on the polished rod 13, the hole seat is fixed into one with screw and the slide rule of two 4m.Polished rod 13 usefulness 45
#Make, specification is ∮ 12 * 195mm, is vertically mounted in the concentric holes of housing 14 both sides with luffing slide rule 8, and luffing spring 12 is enclosed within polished rod 13 1 ends, is pressed on a side of luffing slide rule 8; Be with nut 9 on the opposite side polished rod 13 of luffing slide rule, nut 9 specifications are 47 * 24 * 17mm, cylinder iron make oblong, a circular hole is opened on top, be enclosed within on the polished rod 13, can slide on polished rod, the bottom has the screw hole of M12 * 1, be enclosed within on the screw mandrel 11, lower tip is the tapered slope collision block, at corresponding housing 14 two ends with it, luffing limit switch 10 is housed respectively, collision block can touch luffing limit switch 10 respectively when both direction moves.Screw mandrel 11 usefulness 45
#Round steel is made, and specification is M12 * 1 * 185, is installed in parallel on the housing 14 of homonymy with two plain bearings and polished rod 13, one end of screw mandrel stretches out housing 14, joins with the axle head of flexible axle and luffing winch cylinder, when cylinder rotates, screw mandrel 11 rotates, and promotes the luffing slide rule by nut 9 and moves.
The band steel of power bar slide rule 7 usefulness 210 * 16 * 4mm is made, and has the guide groove of 8 * 150mm in the middle of the end, cooperate with anchor shaft 18 and slide shaft 17, and the other end hinge axis of ∮ 8, select is at housing 14.Near a side of slide shaft 6, tween drive shaft 17 specifications are ∮ 8 * 45mm, pass the guide groove of power bar slide rule 7, moment slide rule 5 and luffing slide rule 8 successively, three slide rules are folded connect together, and form the multidirectional of three slide rules and move.Gravity axis 19 specifications are ∮ 20 * 300mm, be contained in the opposite side of housing 14, parallel with slide shaft 6, afterbody is with gravity spring 16, its reduction length is regulated by nut 15, a vertically arranged with it anchor shaft 18 is being fixed at the middle part, in the guide groove of anchor shaft 18 insertion force bar slide rules 7 ends, can slide along guide groove, head stretches out outside the housing 14, and pulley 20 is housed, pulley 20 specifications are ∮ 150 * 45mm, be fixed on the gravity axis 19 with clamping plate, steel rope 1 is pressed on the tangent line of pulley cylindrical, and makes steel rope form certain included angle.During hoisting heavy, steel rope compressing pulley 20 drives gravity axis 19 and outwards moves, and by anchor shaft 18 motive force bar slide rules 7 revolution certain angles, driving moment slide rule 5 moves, when hoisting heavy overshoot moment, moment slide rule 5 touches moment limit switch 4, sends alerting signal, and cuts off the electricity supply automatically.
Claims (6)
1, a kind of arithmetic expression tower machine limiter of moment is characterized in that:
A, moment slide rule one end have guide groove, and the other end is being fixed slide shaft, and slide shaft links to each other with the moment telltale by the wheel rope.
B, luffing slide rule one end have guide groove, and the other end is equipped with the hole seat, and the hole cover for seat is on polished rod, and nut top also is enclosed within on the polished rod, and the bottom is enclosed within on the screw mandrel.
C, power bar slide rule one end have guide groove, and the top links to each other with gravity axis, and the other end is connected on the housing.
D, tween drive shaft pass the guide groove of three slide rules successively, with its folded connecting together.
2, arithmetic expression tower machine limiter of moment according to claim 1 is characterized in that on the housing of moment slide rule moving direction the moment limit switch being housed.
3, arithmetic expression tower machine limiter of moment according to claim 1 is characterized in that the nut top is equipped with collision block, at corresponding housing two ends with it the luffing limit switch is housed.
4, according to claim 1,3 described arithmetic expression tower machine limiters of moment, it is characterized in that luffing spring and nut are positioned on the both sides of luffing slide rule respectively.
5, arithmetic expression tower machine limiter of moment according to claim 1 is characterized in that broadcasting in the power bar slide rule top guide groove and is inserted with anchor shaft, and anchor shaft is fixed on the gravity axis.
6, according to claim 1,5 described arithmetic expression tower machine limiters of moment, it is characterized in that the fixing spring emphatically of gravity axis afterbody, head is connecting pulley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92211495 CN2136824Y (en) | 1992-03-28 | 1992-03-28 | Operational moment limiter for hoist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92211495 CN2136824Y (en) | 1992-03-28 | 1992-03-28 | Operational moment limiter for hoist |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2136824Y true CN2136824Y (en) | 1993-06-23 |
Family
ID=33763172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92211495 Expired - Fee Related CN2136824Y (en) | 1992-03-28 | 1992-03-28 | Operational moment limiter for hoist |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2136824Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323166A (en) * | 2013-07-09 | 2013-09-25 | 中联重科股份有限公司 | Engineering machine as well as moment limiting method and moment limiting system thereof |
| CN105217468A (en) * | 2015-10-22 | 2016-01-06 | 中联重科股份有限公司 | The method of inspection of the load of weight-lifting equipment and counterweight loading facilities and counterweight |
| CN105236270A (en) * | 2015-10-30 | 2016-01-13 | 湖南中联重科智能技术有限公司 | Gravity center detecting method, device and system for tower crane and tower crane |
-
1992
- 1992-03-28 CN CN 92211495 patent/CN2136824Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323166A (en) * | 2013-07-09 | 2013-09-25 | 中联重科股份有限公司 | Engineering machine as well as moment limiting method and moment limiting system thereof |
| CN103323166B (en) * | 2013-07-09 | 2015-10-28 | 中联重科股份有限公司 | Engineering machinery and moment method for limiting thereof and moment limiting system |
| CN105217468A (en) * | 2015-10-22 | 2016-01-06 | 中联重科股份有限公司 | The method of inspection of the load of weight-lifting equipment and counterweight loading facilities and counterweight |
| CN105217468B (en) * | 2015-10-22 | 2017-08-04 | 中联重科股份有限公司 | The detection method of the load of crane gear and its counterweight loading equipemtn and counterweight |
| CN105236270A (en) * | 2015-10-30 | 2016-01-13 | 湖南中联重科智能技术有限公司 | Gravity center detecting method, device and system for tower crane and tower crane |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |