CN211310551U - Lifting limiting device for crane hook - Google Patents
Lifting limiting device for crane hook Download PDFInfo
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- CN211310551U CN211310551U CN201921517147.2U CN201921517147U CN211310551U CN 211310551 U CN211310551 U CN 211310551U CN 201921517147 U CN201921517147 U CN 201921517147U CN 211310551 U CN211310551 U CN 211310551U
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- steel cable
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- switch
- proximity switch
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Abstract
The utility model discloses a hoist lifting hook stop device that rises relates to the hoist field, including steel cable, stopper, steel cable magnetic sleeve clamp, lifting hook connecting device, the steel cable passes the stopper and is connected with the lifting hook through lifting hook connecting device through the through-hole of stopper, is close to lifting hook connecting device department at the steel cable and has set up the steel cable magnetic sleeve clamp of cover on the steel cable, is provided with passive proximity switch on the stopper, and the magnetic steel cable sleeve clamp can make the switch disconnection when being close to. The utility model has the characteristics of simple structure, convenient to use, factor of safety height, application scope extensively etc.
Description
Technical Field
The utility model relates to the hoist field particularly, relates to a hoist lifting hook stop device that rises.
Background
The crane refers to a multi-action crane for vertically lifting and horizontally carrying heavy objects within a certain range. Also known as crown blocks, navigation cranes and cranes. The hoisting equipment has the working characteristics of intermittent movement, namely corresponding mechanisms for taking materials, transporting, unloading and the like in one working cycle alternately work, so that the development and the use of the crane on the market are more and more extensive. However, during the use of the crane, the safety hazard is inevitably caused for various reasons.
In the ascending process of a lifting hook or a lifting appliance, sometimes, the ascending of the lifting hook or the lifting appliance is not stopped in time, so that a steel wire rope reel or an electric hoist is damaged, in order to prevent the excessive contraction of a steel wire rope of a crane or limit the height of a fetching device, an ascending limiter of the crane is a necessary safety device of the crane, and the main working principle is that when the lifting appliance is lifted to an upper limit position, the limiter can cut off a power supply through various ways, and the phenomenon that a heavy object is dropped because the fetching device such as the lifting hook continues to ascend and is pulled to break the steel wire rope is avoided.
At present, bridge crane's spacing mode is weight and the two spacing protection of spindle nose, and there are a lot of problems in the spacing in-service use of traditional weight: the heavy hammer is easy to damage and fall off; the travel switch is subjected to the downward pulling force of the heavy hammer for a long time, so that the connecting mechanism is damaged; poor contact closure results in virtual connections to the circuit. The problems not only affect the normal production of enterprises, but also increase the labor intensity of maintenance personnel, and once a fault occurs, a circuit is short-sealed in order not to affect the production, thereby bringing serious threat to the safety production.
In order to solve the problem, a chinese patent cn201821122337.x discloses a bridge crane ascending limiter, which comprises a fixed base, a detection rod and a proximity switch; the proximity switch is fixed on the fixed base; the detection rod is positioned above the fixed base; the lower end of the detection rod is connected with a detection sheet; a detection sheet slideway is arranged on one side of the fixed base; one end of the detection sheet is connected with the fixed base through an elastic component; the other end of the detection piece is positioned in the slideway. A fixed block is arranged on the fixed base; the fixed block is provided with a lantern ring sleeved into the detection rod, so that the detection rod can be stably moved. The proximity switch is an eddy current type proximity switch which has the advantages of good anti-interference performance, wide application range and low price. The proximity switch is fixed on the fixed base through a bolt, and installation is convenient. The elastic component is a spring, and the detection piece is guaranteed to move slowly and stably along with the detection rod.
The contact switch of the technical scheme is in non-contact connection with the detection sheet and the detection rod linkage mechanism, so that the problems that the heavy hammer is easy to damage and fall off in the heavy hammer limiting process, and the travel switch is damaged due to the fact that the heavy hammer is pulled downwards for a long time, and the connection mechanism is damaged and the contact is not closed well to cause virtual connection of a line are solved. However, the device occupies a large volume, the closing of the proximity switch is controlled by the movement of the detection rod, a certain delay may exist, the detection piece connected through the spring may affect the normal use due to the falling of the spring, and a certain potential safety hazard still exists.
SUMMERY OF THE UTILITY MODEL
This use neotype purpose provides a hoist lifting hook stop device that rises for prevent that load handling devices such as lifting hook still continue to rise after rising to a take the altitude, thereby break wire rope, destroy wire rope reel and electric block etc. and the jack-up thing that leads to drops, protection hoist device safety, guarantee staff's personal safety.
Based on above purpose, the utility model discloses a hoist lifting hook stop device that rises, including steel cable 1, stopper 2, lifting hook connecting device 5, through-hole 6 and the open upper end confined slotted hole 7 of lower extreme that link up about stopper 2 center is equipped with, the internal diameter of through-hole 6 is greater than the diameter of steel cable 1 is less than lifting hook connecting device 5's external diameter is less than the internal diameter of slotted hole 7, steel cable 1 passes through-hole 6 on the stopper 2 with lifting hook connecting device 5 is connected. Because the internal diameter of through-hole 6 is greater than the diameter of steel cable 1, so can allow the free passage of steel cable 1, this has guaranteed that the lift of steel cable 1 in working range is not influenced, because the internal diameter of through-hole 6 is less than the external diameter of lifting hook connecting device 5, so after lifting hook connecting device 5 rises to a certain height, can't pass through-hole 6 and be stopped by stopper 2. When the operation of the steel cable 1 is blocked, the winch can automatically start the emergency braking device to cut off the power supply, and the stopper 2 plays a role in buffering and braking at the moment.
Further, a section of steel cable magnetic sleeve clamp 4 is arranged at a position, close to the lifting hook connecting device 5, of the steel cable 1, the steel cable magnetic sleeve clamp 4 is wrapped outside the steel cable 1, the outer diameter of the steel cable magnetic sleeve clamp 4 is larger than the inner diameter of the through hole 6 and smaller than or equal to the inner diameter of the slotted hole 7, under the design, the steel cable 1 at the section of the steel cable magnetic sleeve clamp 4 cannot pass through the through hole 6 and is blocked by the stopper 2, the steel cable 1 at the section has the effect of prolonging the braking distance, the braking reaction time is prolonged, and the limiting protection effect can be better played.
Further, a passive proximity switch 3 is arranged in the limiter 2, the passive proximity switch 3 is arranged in the groove hole 7, and the inner diameter of the passive proximity switch 3 is larger than or equal to the diameter of the through hole 6 and smaller than the outer diameter of the steel cable magnetic collet 4. The steel cable magnetic sleeve clamp 4 can act on the passive proximity switch 3 under magnetism, and when the steel cable magnetic sleeve clamp 4 is close to the passive proximity switch 3, the power supply is disconnected, and the steel cable 1 stops rising. The passive proximity switch 3 can control the switch to be closed without contact due to the functional characteristics of the passive proximity switch, and can fully play the protection role of the limiting device.
Furthermore, an elastic press switch 8 is arranged in the limiter 2, the elastic press switch 8 is arranged in the slot hole 7, the inner diameter of the elastic press switch 8 is the same as that of the passive proximity switch 3, the passive proximity switch 3 is connected with the elastic press switch 8 in series, and the elastic press switch 8 is positioned below the passive proximity switch 3. The purpose of the resilient push switch 8 is to prevent failure of the on/off control of the circuit due to failure of the passive proximity switch 3. When the passive proximity switch 3 is in failure, the steel cable 1 continuously rises until the steel cable magnetic sleeve clamp 4 touches the elastic press switch 8, the elastic press switch 8 cuts off the power supply under the action of pressure, and the steel cable 1 stops rising. The two switches are connected in series, so that the circuit can be disconnected as long as one of the switches works normally, and the safety factor of the limiting device is further improved.
Further, the passive proximity switch 3 and the elastic press switch 8 are in an annular structure. Adopt the loop configuration can be corresponding with the structure of stopper 2, steel cable 1, steel cable magnetism collet 4, can make the switch not influence the normal operating of steel cable 1 in the within range on the one hand, on the other hand can make the contact surface of steel cable magnetism collet 4 and switch be close the horizontal plane more for the switch can in time be closed, if adopt other special-shaped structure, probably can make the switch closure untimely, can hinder the normal operating of steel cable 1 even.
The utility model has the characteristics of simple structure, convenient to use, factor of safety are high, application scope is wide etc, can solve load handling devices such as lifting hook well and take place the problem of heavy object dropout accident because of continuing to rise to snap wire rope.
Drawings
Fig. 1 is a schematic structural view of a lifting limiting device of a crane hook, and fig. 2 is a horizontal section of a limiter.
The device comprises a steel cable 1, a steel cable 2, a limiter 3, a passive proximity switch 4, a steel cable magnetic sleeve clamp 5, a lifting hook connecting device 6, a through hole 7, a groove hole 8 and an elastic press switch.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
The utility model provides a hoist lifting hook stop device that rises, be applicable to the hoist of steel cable diameter less than or equal to 20mm, including steel cable 1, stopper 2, lifting hook connecting device 5, through-hole 6 and the open upper end confined slotted hole 7 of lower extreme that link up about being equipped with at the center of stopper 2, the diameter of steel cable is 17.5mm, the internal diameter of through-hole 6 is 40mm, the internal diameter of slotted hole 7 is 80mm, lifting hook connecting device 5's external diameter is 60mm, 2 upper ends of stopper utilize the bolt fastening on the steel cable reel, make the center of stopper 2 vertical downwards, through-hole 6 that steel cable 1 passed on the stopper 2 is connected with lifting hook connecting device 5, the position of adjustment stopper 2 makes the center of steel cable 1 and the center coincidence of stopper 2.
When the hoist moves, because the internal diameter of through-hole 6 is greater than the diameter of steel cable 1, is less than lifting hook connecting device 5's external diameter, this makes through-hole 6 can allow the freedom of steel cable 1 to pass through, and lifting hook connecting device 5 can't pass through, rises to a take the altitude after steel cable 1, and lifting hook connecting device 5 is obstructed in stopper department operation, and emergency braking device is opened to the hoist engine, cuts off power supply, hoist engine stop operation, and stopper 2 plays the effect of buffering braking at this in-process.
Example 2
The utility model provides a hoist lifting hook stop device that rises, is applicable to the hoist of steel cable diameter between 20 ~ 40mm, includes steel cable 1, stopper 2, lifting hook connecting device 5, is equipped with through-hole 6 and the open upper end confined slotted hole 7 of lower extreme that link up from top to bottom at the center of stopper 2, and the diameter of steel cable is 30mm, and the internal diameter of through-hole 6 is 80mm, and the internal diameter of slotted hole 7 is 120mm, and lifting hook connecting device 5's external diameter is 120 mm.
A section of steel cable magnetic sleeve clamp 4 is arranged at the position, close to the lifting hook connecting device 5, of the steel cable 1, the steel cable magnetic sleeve clamp 4 is wrapped outside the steel cable 1, and the outer diameter of the steel cable magnetic sleeve clamp 4 is 100 mm.
A passive proximity switch 3 is arranged in the limiter 2, the passive proximity switch 3 is arranged in the slotted hole 7, the inner diameter of the passive proximity switch 3 is 80mm, and the outer diameter is 120 mm.
Utilize the bolt fastening on the wire rope reel with stopper 2 upper end, make the center of stopper 2 vertical downwards, wire rope 1 passes through-hole 6 on the stopper 2 and is connected with lifting hook connecting device 5, and the position of adjustment stopper 2 makes the center of wire rope 1 and the center coincidence of stopper 2.
The steel cable magnetic sleeve clamp 4 can act with the passive proximity switch 3 under the action of magnetic force, and when the steel cable magnetic sleeve clamp 4 is close to the passive proximity switch 3, the switch can be disconnected. When the crane operates, after the steel cable 1 rises to a certain height, the steel cable magnetic sleeve clamp 4 approaches the passive proximity switch 3, the switch is disconnected, and the winch stops operating. The stop prevents the steel cable 1 from continuously rising through the disconnection of the control circuit.
Example 3
The utility model provides a hoist lifting hook stop device that rises, is applicable to the hoist of steel cable diameter between 20 ~ 40mm, includes steel cable 1, stopper 2, lifting hook connecting device 5, is equipped with through-hole 6 and the open upper end confined slotted hole 7 of lower extreme that link up from top to bottom at the center of stopper 2, and the diameter of steel cable is 30mm, and the internal diameter of through-hole 6 is 80mm, and the internal diameter of slotted hole 7 is 120mm, and lifting hook connecting device 5's external diameter is 120 mm.
A section of steel cable magnetic sleeve clamp 4 is arranged at the position, close to the lifting hook connecting device 5, of the steel cable 1, the steel cable magnetic sleeve clamp 4 is wrapped outside the steel cable 1, and the outer diameter of the steel cable magnetic sleeve clamp 4 is 100 mm.
A passive proximity switch 3 is arranged in the limiter 2, the passive proximity switch 3 is arranged in the slotted hole 7, the inner diameter of the passive proximity switch 3 is 80mm, and the outer diameter is 120 mm.
An elastic press switch 8 is arranged below the passive proximity switch 3, the volume switches are connected in series and then are simultaneously arranged in the slotted hole 7, and the inner diameter of the elastic press switch 8 is 80mm, the outer diameter of the elastic press switch is 120mm, and the inner diameter and the outer diameter of the elastic press switch are consistent with those of the passive proximity switch 3.
Utilize the bolt fastening on the wire rope reel with stopper 2 upper end, make the center of stopper 2 vertical downwards, wire rope 1 passes through-hole 6 on the stopper 2 and is connected with lifting hook connecting device 5, and the position of adjustment stopper 2 makes the center of wire rope 1 and the center coincidence of stopper 2.
The steel cable magnetic sleeve clamp 4 can act with the passive proximity switch 3 under the action of magnetic force, and when the steel cable magnetic sleeve clamp 4 is close to the passive proximity switch 3, the switch can be disconnected. When the crane operates, after the steel cable 1 rises to a certain height, the steel cable magnetic sleeve clamp 4 approaches the passive proximity switch 3, the switch is disconnected, and the winch stops operating.
When passive proximity switch 3 breaks down, when unable disconnection, steel cable 1 can continue to rise a short distance, and until touching elasticity push switch 8, elasticity push switch 8 can break off under the pressure effect, and the hoist engine stop operation. The combined action of the two switches further ensures the normal operation of the limiting device, and plays a better protection role, so that the safety factor is further improved.
Claims (5)
1. A lifting limiting device of a crane lifting hook is characterized by comprising a steel cable (1), a limiter (2) and a lifting hook connecting device (5), wherein the center of the limiter (2) is provided with a through hole (6) which is through up and down and a slotted hole (7) with the lower end open and the upper end closed,
wherein phi steel cable is less than phi through hole is less than phi slotted hole is less than phi lifting hook connecting device,
the steel cable (1) penetrates through a through hole (6) in the stopper (2) to be connected with the lifting hook connecting device (5).
2. A crane hook lifting stop according to claim 1, characterized in that the wire rope (1) is provided with a length of wire rope magnetic collet (4) near the hook connection means (5), the wire rope magnetic collet (4) being wrapped around the outside of the wire rope (1),
wherein phi is more than phi through hole and less than or equal to phi slotted hole of steel cable magnetic sleeve clamp.
3. A crane hook lifting limit device according to claim 1, characterized in that a passive proximity switch (3) and a resilient push switch (8) of annular configuration are provided in the limiter (2).
4. A crane hook lifting stop according to claim 3, characterized in that the passive proximity switch (3) is placed in the slot (7),
wherein phi is not more than phi through hole and is not more than phi passive approach switch and is less than phi steel cable magnetic sleeve clamp,
phi is not more than phi slot holes outside the passive proximity switch.
5. A crane hook lifting stop according to claim 4, characterized in that the resilient push switch (8) is placed in the slot (7), the inner and outer diameter of the resilient push switch (8) being the same as the inner and outer diameter of the passive proximity switch (3), the passive proximity switch (3) being in series with the resilient push switch (8), the resilient push switch (8) being located below the passive proximity switch (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921517147.2U CN211310551U (en) | 2019-09-12 | 2019-09-12 | Lifting limiting device for crane hook |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921517147.2U CN211310551U (en) | 2019-09-12 | 2019-09-12 | Lifting limiting device for crane hook |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211310551U true CN211310551U (en) | 2020-08-21 |
Family
ID=72055079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921517147.2U Active CN211310551U (en) | 2019-09-12 | 2019-09-12 | Lifting limiting device for crane hook |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211310551U (en) |
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2019
- 2019-09-12 CN CN201921517147.2U patent/CN211310551U/en active Active
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