CN201264875Y - Security device for bridge crane - Google Patents
Security device for bridge crane Download PDFInfo
- Publication number
- CN201264875Y CN201264875Y CNU200820136602XU CN200820136602U CN201264875Y CN 201264875 Y CN201264875 Y CN 201264875Y CN U200820136602X U CNU200820136602X U CN U200820136602XU CN 200820136602 U CN200820136602 U CN 200820136602U CN 201264875 Y CN201264875 Y CN 201264875Y
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- lever
- safety device
- switch
- cut
- motor
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Abstract
The utility model relates to a safety device of a bridge type crane. The safety device is characterized in that the device comprises a ratchet mechanism, a first lever, a second lever, an electromagnetic pusher and a cut-off switch. The ratchet mechanism comprises a driving wheel and a driven wheel; the outside of the driven wheel is provided with a plurality of dents; the first lever is rotatablely connected with the second lever; a restoring part is connected between the first lever and the second lever; the electromagnetic pusher is provided with a pushing rod which is connected with one end of the first lever; and one end of the second lever is driven by the driven wheel to drive the second lever to rotate so as to lead the other end of the second lever to trigger the cut-off switch. The safety device of the bridge type crane can detect that a lifting hook slides downward when the lifting hook slides downward due to failures in the lifting process and automatically cut off a main loop power, thus realizing the mechanical braking of a motor.
Description
Technical field
The utility model relates to a kind of crane in bridge type safety device.
Background technology
The control system of existing interchange crane in bridge type, PLC control system for example, only has the hypervelocity of decline mechanical detection means, be that control system is when the motor of controlling and driving crane hook, when the descending speed of suspension hook surpasses the maximum speed that limits, this detecting device can detect that the descending speed of suspension hook is too fast, and control system is then braked motor, thereby reduces the descending speed that rotating speed of motor reduces suspension hook.But when suspension hook hindered downslide for some reason in uphill process, control system did not have the relevant detection device, and this will react artificially, manually control the main circuit power of disconnection motor when gliding finding suspension hook to hinder for some reason, the realization mechanical braking.Reaction artificially realizes that the braking of motor depends on people's capability of reaction to a great extent, has so also increased unsafe factor.
The utility model content
For addressing the above problem, the purpose of this utility model provides a kind of crane in bridge type safety device, in the time of in the suspension hook uphill process, hindering the suspension hook downslide for some reason, in time detect the suspension hook downslide and cut off main circuit power automatically, thus the mechanical braking of realization motor.
For achieving the above object, the crane in bridge type safety device that the utility model provides comprises ratchet device, first lever, second lever, electromagnetic driver and cut-off switch, described ratchet device comprises driving wheel and flower wheel, the outside of described flower wheel has a plurality of recesses, described first lever and second lever are rotationally connected, and also are connected with the answer parts between first lever and second lever; Described electromagnetic driver has catch bar, and this catch bar is connected with an end of first lever, and an end of described second lever is driven by flower wheel, drives the rotation of second lever and makes the other end of second lever trigger described cut-off switch.
The crane in bridge type safety device that the utility model provides, in use, the driving wheel of ratchet device and the machine shaft of hoisting crane are in transmission connection, the other end of first lever can be rotationally connected with the support of the motor of hoisting crane, cut-off switch is connected in the major loop of motor, be used for major loop and power supply are disconnected, electromagnetic driver is connected in the major loop, and (controller control motor rotates along a certain specific direction, and suspension hook is risen) just was transfused to electric energy when only the controller at hoisting crane was in " propradation ".When electromagnetic driver get electric after, its push rod promotes an end of first lever, and an end of second lever is pushed in the recess of flower wheel; In the suspension hook uphill process, driving wheel is along with motor rotates, and at this moment, driving wheel freely rotates, and flower wheel is motionless.If electrical accident appears in suspension hook in uphill process suspension hook is glided, then driving wheel counter-rotating, this moment, driving wheel drove rotation of flower wheel, the end of second lever of recess that is positioned at flower wheel is also along with flower wheel moves, and at this moment, second lever is that fulcrum was put certain angle with the connecting bridge with first lever, the other end of second lever moves towards the direction opposite with an end of second lever, and press cut-off switch, make the major loop outage of motor, thereby start mechanical braking.After the major loop outage, electromagnetic driver is correspondingly outage also, the push rod retraction, spur the end retraction of first lever simultaneously, thereby the concave portion that makes end of second lever and flower wheel from, at this moment, be connected between first lever and second lever the answer parts with second lever with respect to the position of first lever be returned to flower wheel rotate before the time with respect to the position of first lever.Major loop again electric, when controller was in " propradation ", the push rod of electromagnetic driver made an end of second lever be arranged in recess again, to carry out fault detection next time.The safety device that the utility model provides can detect the suspension hook downslide effectively and cut off main circuit power automatically, thereby realize the mechanical braking of motor; Simultaneously, it is simple in structure, is easy to realize, and is with low cost.
Description of drawings
Fig. 1 is that safety device that the utility model provides is in the structural representation under the detected state;
Fig. 2 is the structural representation of crane hook et out of order when propradation safety device that the utility model provides when gliding;
Fig. 3 is the structural representation of the safety device that the utility model provides when electromechanics braking and suspension hook normally descend.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
As shown in Figure 1, the crane in bridge type safety device that the utility model provides comprises ratchet device 1, first lever 3, second lever 4, electromagnetic driver 2 and cut-off switch 5, described ratchet device 1 comprises driving wheel 11 and flower wheel 12, the outside of described flower wheel 12 has a plurality of recesses 13, described first lever 3 and second lever 4 are rotationally connected, and also are connected with between first lever 3 and second lever 4 to reply parts 6; Described electromagnetic driver 2 has catch bar 21, and this catch bar 21 is connected with an end of first lever 3, and an end of described second lever 4 is driven by flower wheel 12, drives 4 rotations of second lever and makes the other end of second lever 4 trigger described cut-off switch 5.
Described catch bar 21 and the connection mode of an end of first lever 3 can be that hinged, pivotal joint or spherical hinge are connected.
Described electromagnetic driver 2 is for well known to a person skilled in the art device, mainly comprise pushing block, push rod, armature, supporter, coil and shell, when giving electromagnetic driver 2 energisings, push rod can stretch out from shell outward, when with electromagnetic driver 2 outages, push rod is to the shell indentation.
Described ratchet device 1 is seldom done description for well known to a person skilled in the art mechanical part at this.
Described cut-off switch 5 can be preferably mechanical switch for well known to a person skilled in the art mechanical switch, electromagnetic switch or transistor switch etc., and this mechanical switch is non-locking.Cut-off switch 5 is connected in the major loop of crane motor, and when when pressing this cut-off switch 5, the connection between major loop and the power supply is disconnected.After the connection between major loop and the power supply is disconnected, even if cut-off switch 5 is returned to initial condition, also can keep the off-state of major loop and power supply, only after pressing starting switch again, major loop and power supply just can reconnect.
Described first lever 3 and second lever 4 can be pivotal joints or hinged, described answer parts 6 can be torsion springs, this torsion spring can be enclosed within on the adapter shaft that connects first lever 3 and second lever 4, and an end of torsion spring is connected with first lever 3, and the other end of torsion spring is connected with second lever 4.
Described answer parts 6 can also be elastic elements such as spring, sheet spring, are preferably spring, and the two ends of spring are connected with second lever 4 with first lever 3 respectively.Described answer parts 6 are used for not making the relative position of first lever 3 and second lever 4 be returned to predetermined position (for example, first lever 3 is vertical with second lever 4) when first lever 3 and second lever 4 are not subjected to external force.
The driving wheel 11 of described ratchet device 1 is in transmission connection with the rotating shaft of motor, and ways of connecting can have multiple.For example, driving wheel 11 can be that key is connected with rotating shaft, and promptly the centre hole of driving wheel 11 is enclosed within the rotating shaft and fixes; Driving wheel 11 and rotating shaft also can be adopted pulley drive, chain sprocket drive and gear transmission, and these type of drive are conventionally known to one of skill in the art, seldom do description.
Described safety device can also comprise base 8, and the other end of described first lever 3 can be rotationally connected with this base 8.This base 8 can be fixed on the support of motor.
For an end that makes second lever 4 cooperates better with recess 13, under the preferable case, an end of second lever 4 also pivotal joint roller 7 (also can be spin) is arranged, be used for cooperating better with described recess 13.Spacing between described adjacent two recesses 13 can be very little, is easier to like this cooperate with an end of second lever 4.
Suspension hook that how this safety device in time to detect hoisting crane is described below in uphill process, electrical accident occurs suddenly and glide, thereby disconnect the power supply of major loop of the motor of hoisting crane, to realize mechanical braking.
In crane in bridge type, behind the supply disconnecton with the major loop of motor, can realize mechanical braking to motor.Described safety device in use, the driving wheel 11 of ratchet device 1 is in transmission connection with the rotating shaft of the motor of hoisting crane, the other end of first lever 3 can be rotationally connected with the support of the motor of hoisting crane, or is rotationally connected with described base 8, then base 8 is fixed on the support.Cut-off switch 5 is connected in the major loop of motor, is used for when pressing this cut-off switch 5 major loop and power supply being disconnected.Electromagnetic driver 2 is connected in the major loop, and when only the controller at hoisting crane is in " propradation ", (be that controller control motor rotates along a certain specific direction, suspension hook is risen) just be transfused to electric energy, that is to say, during position when placing the suspension hook that makes hoisting crane to rise the function unit (for example, control stalk, control button etc.) of control, electromagnetic driver 2 just is switched on power supply.When electromagnetic driver 2 electric after, its push rod promotes an end of first lever 3, and an end of second lever 4 is pushed in the recess 13 of flower wheel 12; In the suspension hook uphill process, driving wheel 11 is along with motor rotates, and at this moment, driving wheel 11 freely rotates, and flower wheel 12 is motionless.If electrical accident appears in suspension hook in uphill process suspension hook is glided, then driving wheel 11 counter-rotatings, as shown in Figure 2,12 rotations of driving wheel 11 drive flower wheels this moment, the end of second lever 4 of recess 13 that is positioned at flower wheel 12 is also along with flower wheel 12 moves, at this moment, second lever 4 is that fulcrum was put certain angle with the connecting bridge with first lever 3, and the other end of second lever 4 moves towards the direction opposite with an end of second lever 4.When flower wheel 12 turned over certain angle (for example quarter turn), the mobile triggering cut-off switch 5 of the other end of second lever 4 made the major loop outage of motor, thereby starts mechanical braking.After the major loop outage, electromagnetic driver 2 is correspondingly outage also, and the push rod retraction spurs the end retraction of first lever 3 simultaneously, thereby an end of second lever 4 is separated with the recess 13 of flower wheel 12, as shown in Figure 3.At this moment, be connected between first lever 3 and second lever 4 answer parts 6 with second lever 4 with respect to the position of first lever 3 be returned to flower wheel 12 rotate before the time with respect to the position of first lever 3.Major loop again electric (pressing starting switch), and controller is when being in " propradation ", the push rod of electromagnetic driver 2 makes an end of second lever 4 be arranged in recess 13 again, to carry out fault detection next time.Distance between adjacent two recesses 13 can be very little, makes an end easier recess 13 that enters under the help of roller 7 of second lever 4 like this.As shown in Figure 3, when suspension hook is in normal decline state, the motor counter-rotating, (driving wheel 11 clockwise rotates among Fig. 3) even if this moment flower wheel 12 along with 11 rotations of driving wheel, but an end of second lever 4 separates with ratchet device 1, therefore can not produce any influence to the decline of suspension hook.The safety device that the utility model provides can detect the suspension hook downslide effectively and cut off main circuit power automatically, thereby realize the mechanical braking of motor; Simultaneously, it is simple in structure, is easy to realize, and is with low cost.
Claims (6)
1, a kind of crane in bridge type safety device, it is characterized in that, this device comprises ratchet device (1), first lever (3), second lever (4), electromagnetic driver (2) and cut-off switch (5), described ratchet device (1) comprises driving wheel (11) and flower wheel (12), the outside of described flower wheel (12) has a plurality of recesses (13), described first lever (3) and second lever (4) are rotationally connected, and also are connected with between first lever (3) and second lever (4) to reply parts (6); Described electromagnetic driver (2) has catch bar (21), this catch bar (21) is connected with an end of first lever (3), one end of described second lever (4) is driven by flower wheel (12), drives second lever (4) rotation and makes the other end of second lever (4) trigger described cut-off switch (5).
2, safety device according to claim 1 is characterized in that, an end pivoting of described second lever (4) is connected with roller (7), and this roller (7) cooperates with described recess (13).
3, safety device according to claim 1 is characterized in that, described answer parts (6) are torsion spring, and an end of described torsion spring is connected with described first lever (3), and the other end of torsion spring is connected with described second lever (4).
4, safety device according to claim 1 is characterized in that, described answer parts (6) are spring, and the two ends of spring are connected with second lever (4) with described first lever (3) respectively.
5, safety device according to claim 1 is characterized in that, described cut-off switch (5) is nonlocking mechanical switch.
6, safety device according to claim 1, this safety device also comprise base (8), and the other end of described first lever (3) and this base (8) are rotationally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820136602XU CN201264875Y (en) | 2008-09-10 | 2008-09-10 | Security device for bridge crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820136602XU CN201264875Y (en) | 2008-09-10 | 2008-09-10 | Security device for bridge crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201264875Y true CN201264875Y (en) | 2009-07-01 |
Family
ID=40831235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820136602XU Expired - Fee Related CN201264875Y (en) | 2008-09-10 | 2008-09-10 | Security device for bridge crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201264875Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105947895A (en) * | 2016-06-27 | 2016-09-21 | 中国有色（沈阳）冶金机械有限公司 | Automatic parking safety protection device for crane |
| CN108946376A (en) * | 2018-07-27 | 2018-12-07 | 芜湖优诺信息科技有限公司 | A kind of conveying device |
| CN111756888A (en) * | 2019-03-28 | 2020-10-09 | 群光电子股份有限公司 | Electronic device and actuating mechanism thereof |
-
2008
- 2008-09-10 CN CNU200820136602XU patent/CN201264875Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105947895A (en) * | 2016-06-27 | 2016-09-21 | 中国有色（沈阳）冶金机械有限公司 | Automatic parking safety protection device for crane |
| CN105947895B (en) * | 2016-06-27 | 2017-06-16 | 中国有色（沈阳）冶金机械有限公司 | Crane automatic stopping safety device |
| CN108946376A (en) * | 2018-07-27 | 2018-12-07 | 芜湖优诺信息科技有限公司 | A kind of conveying device |
| CN111756888A (en) * | 2019-03-28 | 2020-10-09 | 群光电子股份有限公司 | Electronic device and actuating mechanism thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: PANZHIHUA STEEL GROUP PANGANG GROUP STEEL VANADIUM Free format text: FORMER NAME: PANZHIHUA NEW STEEL + VANADIUM CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: Panzhihua City, Sichuan province 617067 Xiangyang Village East Patentee after: Pangang Group Steel Vanadium & Titanium Co., Ltd. Address before: 617067 Nong Ping, Eastern District, Sichuan, Panzhihua Patentee before: Panzhihua New Steel & Vanadium Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20130910 |