CN203428745U - Electric grab bucket - Google Patents
Electric grab bucket Download PDFInfo
- Publication number
- CN203428745U CN203428745U CN201320528604.4U CN201320528604U CN203428745U CN 203428745 U CN203428745 U CN 203428745U CN 201320528604 U CN201320528604 U CN 201320528604U CN 203428745 U CN203428745 U CN 203428745U
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- CN
- China
- Prior art keywords
- electric block
- grab bucket
- control loop
- supporting beam
- weight
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- Expired - Fee Related
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Abstract
The utility model discloses an electric grab bucket and belongs to the technical field of hoisting equipment. The electric grab bucket comprises an upper supporting beam, a lower supporting beam, an electric hoist and an overload protection device, wherein the upper supporting beam and the lower supporting beam are arranged at an interval vertically; the electric hoist is arranged below the upper supporting beam; the overload protection device is connected to a steel wire rope of the electric hoist; a limiting switch which is conductively connected to a control loop of the electric hoist is arranged on the upper supporting beam; a counter weight is suspended on the limiting switch through a pulling rope; when the grab bucket is opened, the limiting switch is in a state of switching on the control loop of the electric hoist under the action of gravity of the counter weight; when the grab bucket is closed, the lower supporting beam lifts up the counter weight, and the limiting switch is in a state of switching off the control loop of the electric hoist. According to the electric grab bucket, the limiting switch and an overload limiter are simultaneously adopted; when one of the limiting switch and the overload limiter fails, the other one of the limiting switch and the overload limiter can protect the steel wire rope of the electric hoist, so that a double-protection effect is achieved.
Description
Technical field
The utility model relates to a kind of motor grab, belongs to weight-lifting equipment technical field.
Background technology
Motor grab is a kind of conventional weight-lifting equipment, is usually used in capturing bulk goods, as the vinegar grain of the vinasse He Zhi vinegar factory of winery.Motor grab comprises between the upper and lower every horizontally disposed deck beam and through beam and is hinged on two bucket bodies that are buckled togather on through beam, the two ends of deck beam are hinged with respectively the pull bar that drives grab bucket to open and close, and are fixed with for promoting the electric block of through beam on deck beam.Motor grab can be reduced to sliding-block linkage, and electric block promotes through beam, and two bucket bodies of pull bar drive are closed gradually captures material with this, when bucket body is completely closed, controls electric block and quits work.Crane in bridge type coordinates motor grab can complete easily the handling of material, and production efficiency is improved.After bucket body closure, if make not in time electric block power-off, electric block works on and will make the stressed excessive even fracture of steel rope on electric block, and wire cable rupture not only easily causes the accident, and maintenance wastes time and energy, and has a strong impact on production efficiency.
Notification number is CN2752224Y, name is called in the Chinese utility model patent of " electric block grab bucket " and discloses a kind of motor grab with steel rope overload protection device, overload protection device in this motor grab comprises the bearing being arranged on deck beam and is arranged on the interior bearing pin along upper downward-extension of bearing, on bearing pin, be arranged with stage clip, the upper end that is positioned at stage clip on bearing pin is provided with the gear laminated structure of pressing stage clip for keeping off, the lower end of bearing pin passes bearing and is provided with the pull bar that drives bearing pin to move down, pull bar is connected with the steel rope of electric block on motor grab, deck beam is provided with the limit switch of controlling electric block break-make, the top of limit switch is provided with and the depression bar being fixed on gear laminated structure.After two bucket body closures of motor grab, under the Action of Gravity Field of steel rope material in bucket body, drive pull bar and bearing pin to move down, when moving down, bearing pin drive gear laminated structure to compress stage clip downwards, when grab bucket crawl amount is excessive or steel rope is subject to improper power and makes steel rope overload, depression bar on gear laminated structure will be depressed limit switch, therefore thereby cutoff circuit makes electric block, power-off quits work, and can prevent from that electric block from working on to cause the problem of wire cable rupture.But when the goods that captures when motor grab is heavier, the stage clip in this motor grab just needs very large ultimate load, this is just higher to the performance requriements of stage clip, makes the cost increasing of motor grab.In addition, once limit switch lost efficacy, just can not cut off in time the power supply of electric block, cause possibly wire cable rupture.
Summary of the invention
The purpose of this utility model still can be cut off the motor grab of electric block power supply after being to provide a kind of overload protection device on steel rope to lose efficacy.
For achieving the above object, the utility model adopts following technical scheme: a kind of motor grab, comprise upper and lower spaced deck beam and through beam, be arranged on the electric block of deck beam below and be connected to the overload protection device on electric block steel rope, described deck beam is provided with conduction and is connected to the limit switch on electric block control loop, on limit switch, by a stay cord, be hung with weight, when grab bucket is opened, limit switch is the state in connection electric block control loop under the Action of Gravity Field of weight; When grab bucket is closed, described through beam upwards holds up weight, and limit switch is in cutting off the state of electric block control loop.
Described overload protection device comprises the load limiter that is serially connected on electric block steel rope and is connected with electric block control loop conduction, and the threshold value that load limiter is set equals the maximum permission pulling force of electric block steel rope.
Described through beam is provided with for holding up the supporting plate of weight.
The utility model in use, is controlled the switching of bucket body by electric block, when grab bucket is opened, the weight suspending in midair on deck beam limit switch is connected control loop, and electric block normally moves; Electric block upwards promotes through beam until grab bucket when completely closed, and through beam upwards holds up weight, and limit switch is stressed to be reduced and cutting-off controlling loop, thereby makes electric block power-off.The utility model arranges limit switch and load limiter simultaneously, and when one of them lost efficacy, another can also be protected electric block steel rope, has played the effect of duplicate protection.The utility model is simple in structure, cost is low, does not make in time electric block power-off and cause lineoutofservice signal pull to increase rapidly and the generation of the problem that ruptures after the closure that can actv. prevents from grabbing bucket.
Further, when the weight of material capturing when motor grab surpasses the threshold value of load limiter, load limiter action makes electric block power-off, can prevent that lineoutofservice signal pull is excessive and ruptures.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the utility model; (grab bucket is in closure state)
Fig. 2 is grab bucket in Fig. 1 schematic diagram in half open configuration;
Fig. 3 is grab bucket in Fig. 1 schematic diagram in complete open configuration.
The specific embodiment
A kind of embodiment of the utility model motor grab as shown in Figure 1 to Figure 3, it comprises between the upper and lower every horizontally disposed deck beam 6 and through beam 10, the below of deck beam 6 is provided with for promoting the electric block 7 of through beam, on through beam 10, be hinged with two bucket bodies that are buckled togather 11, the two ends of deck beam 6 are hinged with and control respectively the pull bar 8 that two bucket bodies open and close, on electric block steel rope 9, be connected with overload protection device, this overload protection device comprises the load limiter 3 that is serially connected on electric block steel rope 9 and is connected with electric block control loop conduction, the maximum that the threshold value that load limiter is set equals electric block steel rope allows pulling force.Deck beam 6 is provided with conduction and is connected to the limit switch 2 on electric block control loop, on limit switch 2, by a stay cord, be hung with the weight 4 that is positioned at through beam top, when grab bucket is opened, weight 4 is only subject to the gravity of self and the pulling force of stay cord, and limit switch 2 is the state in connection electric block control loop under the Action of Gravity Field of weight; When grab bucket is closed, the baffle plate 5 being arranged on through beam 10 upwards holds up weight 4, and limit switch is in cutting off the state of electric block control loop.In use, by regulating the suspension point of weight and the threshold value of load limiter, thereby within making the stressed scope in allowing of electric block steel rope, avoided it to rupture in the course of the work.
The motor grab of the present embodiment in use, by electric block, controlling through beam rises, through beam drives two bucket bodies to gather until completely closed when rising, the baffle plate being arranged on through beam upwards holds up weight, limit switch is stressed to be reduced and cutting-off controlling loop, thereby electric block power-off is quit work, so just can prevent from grabbing bucket after closure, operating personal fail to close in time electric block and make steel rope stressed excessive and fracture problem.When motor grab capture weight of material while surpassing the threshold value of load limiter, load limiter action quits work electric block, this just plays duplicate protection to steel rope.
In other embodiment of the present utility model, the baffle plate on through beam can save, and through beam can directly upwards hold up weight.
In other embodiment of the present utility model, overload protection device also can adopt the physical constructions such as spring that are connected with steel rope, thereby steel rope is carried out to overload protection.
Claims (3)
1. a motor grab, comprise upper and lower spaced deck beam and through beam, be arranged on the electric block of deck beam below and be connected to the overload protection device on electric block steel rope, it is characterized in that: described deck beam is provided with conduction and is connected to the limit switch on electric block control loop, on limit switch, by a stay cord, be hung with weight, when grab bucket is opened, limit switch is the state in connection electric block control loop under the Action of Gravity Field of weight; When grab bucket is closed, described through beam upwards holds up weight, and limit switch is in cutting off the state of electric block control loop.
2. motor grab according to claim 1; it is characterized in that: described overload protection device comprises the load limiter that is serially connected on electric block steel rope and is connected with electric block control loop conduction, the threshold value that load limiter is set equals the maximum permission pulling force of electric block steel rope.
3. motor grab according to claim 1 and 2, is characterized in that: described through beam is provided with for holding up the supporting plate of weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320528604.4U CN203428745U (en) | 2013-08-28 | 2013-08-28 | Electric grab bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320528604.4U CN203428745U (en) | 2013-08-28 | 2013-08-28 | Electric grab bucket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203428745U true CN203428745U (en) | 2014-02-12 |
Family
ID=50057796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320528604.4U Expired - Fee Related CN203428745U (en) | 2013-08-28 | 2013-08-28 | Electric grab bucket |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203428745U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891333A (en) * | 2015-05-31 | 2015-09-09 | 钟兵 | Self-opening prevention device of grab bucket |
-
2013
- 2013-08-28 CN CN201320528604.4U patent/CN203428745U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891333A (en) * | 2015-05-31 | 2015-09-09 | 钟兵 | Self-opening prevention device of grab bucket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20140828 |
|
| EXPY | Termination of patent right or utility model |