CN203229328U - Installation structure for overload limiter of ship unloader - Google Patents
Installation structure for overload limiter of ship unloader Download PDFInfo
- Publication number
- CN203229328U CN203229328U CN 201320222628 CN201320222628U CN203229328U CN 203229328 U CN203229328 U CN 203229328U CN 201320222628 CN201320222628 CN 201320222628 CN 201320222628 U CN201320222628 U CN 201320222628U CN 203229328 U CN203229328 U CN 203229328U
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- sensor
- pulley
- rocking lever
- sheave shaft
- bearing seat
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Abstract
The utility model relates to an installation structure for an overload limiter of a ship unloader. The installation structure comprises a first pulley shaft and a second pulley shaft arranged symmetrically, wherein the first pulley shaft sequentially penetrates through a standard redirection pulley block, a first bearing seat and a rocking lever and is connected with the outer end of the first pulley shaft by adopting a key; the second pulley shaft sequentially penetrates a wide groove redirection pulley block, a second bearing seat and a rocking lever and is connected with the outer end of the second pulley shaft by adopting a key; each of the first bearing seat and the second bearing seat is connected with a pulley support, a sensor supporting seat is connected to a bracket on the pulley supports by adopting bolts, and a sensor is installed at the other ends of the sensor supporting seat and each rocking lever in a penetrating mode and fixed through a clamping shaft plate; and the rotating centers of the first pulley shaft and the second pulley shaft are arranged eccentrically with the rotating centers of the rocking levers. The installation structure is simple and easy and convenient to maintain; and by changing the integrated structure of the conventional pulley shaft and sensor and using the principle of eccentric torque balance, the sensors are loaded definitely and are high in sensing precision.
Description
Technical field
The utility model relates to the overload freight weight limit apparatus field of hoisting crane, relates in particular to a kind of mounting structure of the load limiter for ship unloaders.
Background technology
At present, according to the requirement of hoist design specification and crane safety operating instruction, elevator machinery all should be equipped load limiter, and the conventional structure form of load limiter has bearing seat formula, pin type, compression leg formula and tensile stress formula etc. several.
General overhead and gantry cranes bearing seat formula commonly used or pin type, harbour handling ship and door sitting posture hoisting crane pin type commonly used or compression leg formula; Load limiter is by the sensing chip in the sensor, effect output strain signal by the induction external load, and process amplification calculation process finally is converted to the demonstration of hoisting capacity signal, when hoisting capacity surpasses specified lifted load, elevator machinery can only be done and transfer action, avoids because overloading to initiation safety misadventures that causes damage such as metal construction, hoist rope, motor, reductor and coupler with this.
The load limiter of tradition ship unloaders normally adopts pin type, with LOAD CELLS as the changed course sheave shaft, play heavy lift and pass to LOAD CELLS with haulage cable through pulley, the direct acting transmission form of this load makes the suffered load of LOAD CELLS bigger, and then cause that type selecting is bigger than normal, cost improves, while is along with the increasing of pulley load-carrying capacity and bearing bore diameter, the also corresponding increase of the diameter of axle size of sensor, and its induction precision can reduce on the contrary, and this kind installation form also is unfavorable for the maintenance replacing simultaneously.
The utility model content
The applicant is at above-mentioned existing issue, carried out research and improved, and a kind of mounting structure of the load limiter for ship unloaders is provided, have save cost, the advantage convenient, that sensing accuracy is high is changed in maintenance.
The technical scheme that the utility model adopts is as follows:
A kind of mounting structure of the load limiter for ship unloaders comprises that first sheave shaft and second sheave shaft of symmetric arrangement, first sheave shaft run through standard changed course assembly pulley, clutch shaft bearing seat, rocking lever in proper order and be connected with the outer end employing key of first sheave shaft; Described second sheave shaft runs through sipes changed course assembly pulley, second bearing seat, rocking lever in proper order and is connected with the outer end employing key of second sheave shaft; Clutch shaft bearing seat and second bearing seat all are connected with pulley support, and the sensor support seat adopts bolt to be connected on the support on the pulley support, and sensor runs through the other end that described sensor support seat and rocking lever are installed, and fixes by the axis plate; The center of gyration of described first sheave shaft, second sheave shaft all with the center of gyration arranged off-centre of rocking lever.
Its further technical scheme is:
The opposite end of first sheave shaft and second sheave shaft is supported by the common axis bearing;
Have waist shaped hole on the rocking lever.
Described rocking lever, sensor support seat and sensor are 2 cover symmetric arrangement.
The beneficial effects of the utility model are as follows:
The utility model is simple in structure, installation, easy maintenance, by changing the structure of original sheave shaft and sensor integral type, utilize the eccentric moment equilibrium principle, with sheave shaft center of gyration and rocking lever center of oscillation arranged off-centre; rocking lever and sensor are hinged by supporting seat; rocking lever and sensor hinge-point adopt the waist shaped hole form; in order to discharge rocking lever and the sensor effect of contraction in horizontal surface; make sensor only be subjected to the effect of vertical load; the sensor stand under load is clear and definite like this, the sensing accuracy height, sensor type selecting cost also reduces greatly simultaneously.
Description of drawings
Fig. 1 is the sectional structure scheme drawing that the eccentric sheave axle is connected with rocking lever, sipes changed course assembly pulley, standard changed course assembly pulley and bearing seat in the utility model.
Fig. 2 is mounting structure scheme drawing of the present utility model.
Fig. 3 is the stressed scheme drawing of sensor in the utility model for Fig. 2.
Fig. 4 is the structural representation of rocking lever in the utility model.
Fig. 5 is the mounting structure scheme drawing of sensor and rocking lever and sensor support seat in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described.
As shown in Figure 1, the utility model comprises that the opposite end of first sheave shaft 101 of symmetric arrangement and second sheave shaft, 301, the first sheave shafts 101 and second sheave shaft 301 supports by common axis bearing 2.First sheave shaft 101 order runs through standard changed course assembly pulley 1, clutch shaft bearing seat 8 and is connected by key 501 with an end of rocking lever 5; Second sheave shaft, 301 orders run through sipes changed course assembly pulley 3, second bearing seat 4 and also are connected by key 501 with an end of rocking lever 5; As shown in Figure 4, have waist shaped hole 502 on the rocking lever 5.As shown in Figure 1, clutch shaft bearing seat 8, second bearing seat 5 and common axis bearing 2 all are connected with pulley support 9; As shown in Figure 2, sensor support seat 6 is fastened on the bracing frame on the pulley support 9 by bolt; As Fig. 4, shown in Figure 5, sensor 7 runs through the waist shaped hole 502 of sensor installation supporting seat 6 and rocking lever 5, and fixing by axis plate 601, and axis plate 601 is by being bolted on the sensor support seat 6; As shown in Figure 3, the center of gyration of first sheave shaft 101, second sheave shaft 301 all with the center of gyration arranged off-centre of rocking lever 5.As shown in Figure 1, rocking lever 5, sensor support seat 6 and sensor 7 are totally 2 covers that are symmetrically arranged.
Concrete working process of the present utility model is as follows:
When load is done to promote operation, haulage cable pile warp sipes changed course assembly pulley 3 and standard changed course assembly pulley 1, make sipes changed course assembly pulley 3 and 1 revolution of standard changed course assembly pulley and produce eccentric moment, this eccentric moment is through first sheave shaft 101 and second sheave shaft 301, be delivered to sensor 7 on the sensor support seat 6 simultaneously through rocking lever 5, because rocking lever 5 adopts waist shaped hole 501 hinged with sensor 7, rocking lever 5 and the constraint of sensor 7 on horizontal surface are released, sensor 7 only bears vertical load application force, make the stressed clearer and more definite of sensor 7, because sensor 7 is to utilize the indirect stand under load of eccentric moment equilibrium principle by rocking lever 5, sensor 7 stressed less.
As shown in Figure 3, sensor institute bearing load is derived by following equation and is drawn:
In the aforesaid equation
Expression sensor support seat 6 acts on the support reaction of rocking lever by sensor 7, and its value is big or small to equal the positive pressure that rocking lever acts on sensor.
F
1Represented that heavy lift acts on the pulling force of sipes or standard changed course assembly pulley by steel rope branch;
F
2The expression hitch wheel acts on the pulling force of sipes or standard changed course assembly pulley by steel rope branch;
D represents the diameter of sipes or standard changed course pulley;
E represents that the pulley center of gyration is with respect to the eccentric throw of rocking lever center of oscillation;
L
2The horizontal throw at expression rocking lever center of oscillation and sensor support seat center, the i.e. arm of force.
Because F
1And F
2Twine the applied loading that produces through sipes or standard changed course assembly pulley for same steel rope branch, ignore the resistance of refusing to budge of steel rope pile warp assembly pulley, get F=F in the calculating
1=F
2, then draw the 3. net result of formula.
Embodiment 1:
The bridge-type grab ship unloader (rated load weight is 20t) of existing 800t/h is example substitution aforesaid equation and calculates, and adopts four winding drum different gear reducer trailer coupling because grab bucket hoists to open and close, and namely specified lifted load is born by four steel rope branches, then F=F
1=F
2=20/4=5t gets eccentric distance e=15mm, arm of force L
2=400mm, standard changed course assembly pulley or the following formula of sipes changed course assembly pulley diameter D=1000mm substitution:
Only need choose 2 sensors that overlap 0.6t by the eccentric moment balance mode as can be known by above result of calculation can meet the demands.
If adopt the conventional form that substitutes sheave shaft with sensor, then used sensor of pulley be steel rope branch pile warp standard changed course assembly pulley or sipes changed course assembly pulley produce close tension force, F '=2F=10t then, can contrast thus to draw and adopt the structure of arranged off-centre that the type selecting of sensor is obviously optimized, reduce the type selecting cost greatly.
More than describing is to explanation of the present utility model, is not the restriction to utility model, and the utility model institute restricted portion is referring to claim, and under the situation of basic structure of the present utility model, the utility model can be done any type of modification.
Claims (4)
1. mounting structure that is used for the load limiter of ship unloaders, it is characterized in that: comprise first sheave shaft (101) and second sheave shaft (301) of symmetric arrangement, described first sheave shaft (101) order runs through standard changed course assembly pulley (1), clutch shaft bearing seat (8), rocking lever (5) and is connected with the outer end employing key of first sheave shaft; Described second sheave shaft (301) order runs through sipes changed course assembly pulley (3), second bearing seat (4), rocking lever (5) and is connected with the outer end employing key of second sheave shaft; Described clutch shaft bearing seat (8) and second bearing seat (4) all are connected with pulley support (9), sensor support seat (6) adopts bolt to be connected on the support on the pulley support (9), sensor (7) runs through the other end that described sensor support seat (6) and rocking lever (5) are installed, and fixing by axis plate (601); The center of gyration of described first sheave shaft (101), second sheave shaft (301) all with the center of gyration arranged off-centre of rocking lever (5).
2. the mounting structure of a kind of load limiter for ship unloaders as claimed in claim 1, it is characterized in that: the opposite end of described first sheave shaft (101) and second sheave shaft (301) is supported by common axis bearing (2).
3. the mounting structure of a kind of load limiter for ship unloaders as claimed in claim 1 is characterized in that: have waist shaped hole (502) on the described rocking lever (5).
4. the mounting structure of a kind of load limiter for ship unloaders as claimed in claim 1, it is characterized in that: described rocking lever (5), sensor support seat (6) and sensor (7) are 2 cover symmetric arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320222628 CN203229328U (en) | 2013-04-27 | 2013-04-27 | Installation structure for overload limiter of ship unloader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320222628 CN203229328U (en) | 2013-04-27 | 2013-04-27 | Installation structure for overload limiter of ship unloader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203229328U true CN203229328U (en) | 2013-10-09 |
Family
ID=49285466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320222628 Withdrawn - After Issue CN203229328U (en) | 2013-04-27 | 2013-04-27 | Installation structure for overload limiter of ship unloader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203229328U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274302A (en) * | 2013-04-27 | 2013-09-04 | 江苏工力重机有限公司 | Mounting structure of overload limiter of ship unloader |
| CN114633074A (en) * | 2022-03-23 | 2022-06-17 | 惠生（南通）重工有限公司 | Manufacturing method of hinged point type equipment base |
-
2013
- 2013-04-27 CN CN 201320222628 patent/CN203229328U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274302A (en) * | 2013-04-27 | 2013-09-04 | 江苏工力重机有限公司 | Mounting structure of overload limiter of ship unloader |
| CN103274302B (en) * | 2013-04-27 | 2015-04-29 | 江苏工力重机有限公司 | Mounting structure of overload limiter of ship unloader |
| CN114633074A (en) * | 2022-03-23 | 2022-06-17 | 惠生（南通）重工有限公司 | Manufacturing method of hinged point type equipment base |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131009 Effective date of abandoning: 20150429 |