CN217780574U

CN217780574U - Emergency brake device for lifting overspeed of crane

Info

Publication number: CN217780574U
Application number: CN202221336786.0U
Authority: CN
Inventors: 王立建; 刘文明; 张春丽; 翟景运; 靳朋伟; 傅博
Original assignee: Henan Dongqi Machinery Co ltd
Current assignee: Henan Dongqi Machinery Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-11-11
Anticipated expiration: 2032-05-31

Abstract

The utility model relates to an emergency braking device for lifting overspeed of a crane, which comprises a bracket, wherein a brake pad component is correspondingly arranged below a friction disc; the outer wall of hollow shaft is fixed and is equipped with first gear, the top meshing of first gear is equipped with the second gear, one side of mounting bracket be equipped with hall speed measurement subassembly and with hall speed measurement subassembly electric connection's PLC controlling means, can measure the speed to the center pin of reel in real time through hall speed measurement subassembly, when lifting by crane speed too fast, hall speed measurement subassembly is pulse signal input to PLC controlling means immediately, in order to open miniature hydraulic cylinder subassembly, thereby hold the center pin tightly, the first gear of center pin drive rotates, first gear drive second gear rotates, in order to slow down the center pin, then, start the brake block subassembly, it realizes the braking to rub through brake block subassembly and friction disc, avoid the brake block subassembly direct and fast-speed friction disc contact and the wearing and tearing seriously, the effectual life who improves the brake block.

Description

Emergency braking device for lifting overspeed of crane

Technical Field

The utility model relates to a hoist technical field especially relates to a hoist promotes emergency braking device that exceeds speed limit.

Background

The crane is widely applied in various fields at present, the uniform speed is ensured as much as possible in order to ensure the safety and protect the lifting speed of the heavy object when the heavy object is lifted, but the situation is not the same, and the lifting speed is very dangerous if the lifting speed is too high in an accident, so that the braking of the crane is very critical when the lifting speed is too high, for example, chinese patent document with the publication number of CN 212315406U discloses an emergency braking device for the lifting overspeed of the crane, which comprises a vertical plate, an output shaft and a base, wherein a singlechip is fixedly connected at the middle position of the top end in the base, a motor is fixedly connected at the middle position of one side of the base, the output end of the motor penetrates through the side wall of the base and is transversely and fixedly connected with a screw rod, and the both ends on lead screw surface all threaded connection have the pole piece, the equal vertical fixedly connected with riser in top of pole piece, and the equal fixedly connected with heat radiation structure of one end of riser one side, the equal fixedly connected with braking plate in one end of riser opposite side, and the even fixedly connected with speed reduction spring in one side of braking plate, the equal fixedly connected with speed reduction plate in one side of speed reduction spring, and the equal fixedly connected with mounting structure in top and the bottom of speed reduction plate, one side of speed reduction plate all is provided with the braking piece, the intermediate position department fixedly connected with speedtransmitter on base top, and speedtransmitter's top is provided with the output shaft, the front of output shaft is through bull stick fixedly connected with brake gear, and the device is not only complicated in structure, and braking effect is relatively poor, and the braking piece is worn and torn easily, can't satisfy the demand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hoist promotes the emergency braking device that exceeds speed for solve current hoist and promote the emergency braking device that exceeds speed not only the structure complicated, braking effect is relatively poor moreover, the problem of the easy wearing and tearing of brake block.

In order to solve the above problems, the emergency braking device for hoisting an overspeed of a crane includes a bracket, a moving seat is slidably arranged on the bracket, a mounting bracket is fixedly arranged on the moving seat, a winding drum is rotatably arranged on the mounting bracket, a lifting rope is wound on the winding drum, a motor for driving the winding drum to rotate is fixedly arranged on one side of the mounting bracket, a central shaft of the winding drum is a friction disc fixedly connected with the same axis, and a brake disc assembly is correspondingly arranged below the friction disc; the center pin runs through the one end of friction disk and rotates in one side of fixed plate, one side of fixed plate is fixed and is equipped with the spacing ring, the spacing ring internal rotation is equipped with the hollow shaft, the hollow shaft cover is located outside the center pin, the outer wall of hollow shaft is fixed and is equipped with first gear, the top meshing of first gear is equipped with the second gear, one side symmetry of first gear is fixed be equipped with be used for hugging closely the miniature hydraulic cylinder subassembly of center pin, one side of mounting bracket be equipped with hall speed measuring component and with hall speed measuring component electric connection's PLC controlling means.

The utility model provides a pair of hoist promotes emergency braking device that exceeds speed limit still has following technical characteristic:

furthermore, the brake block assembly comprises an electric push rod, a clamping plate fixedly connected with the output end of the electric push rod and a brake block connected with the clamping plate.

Further, the outer diameter of the first gear is smaller than the outer diameter of the second gear.

Furthermore, the miniature hydraulic cylinder component comprises a support plate symmetrically fixed on one side of the first gear, a miniature hydraulic cylinder fixedly connected with the support plate and an arc-shaped clamping plate fixedly connected with the output end of the hydraulic cylinder.

Further, a wear-resistant clamping block is fixedly arranged on the central shaft coaxially, and an annular clamping groove corresponding to the arc-shaped clamping plate is formed in the wear-resistant clamping block.

Furthermore, the outer wall of the hollow shaft is fixedly provided with stop blocks, and the stop blocks are arranged on two sides of the limiting ring at intervals.

Furthermore, the Hall speed measuring assembly comprises a magnetic block fixed on the central shaft and a Hall element arranged corresponding to the magnetic block, and the Hall element is electrically connected with the PLC control device.

Furthermore, the bottom of the lifting rope is fixedly connected with a lifting hook.

The utility model discloses following beneficial effect has: the Hall speed measuring component can measure the speed of the central shaft of the winding drum in real time, when the hoisting speed is too high, the Hall speed measuring component immediately inputs a pulse signal to the PLC control device to open the miniature hydraulic cylinder component so as to tightly hold the central shaft, the central shaft drives the first gear to rotate, the first gear drives the second gear to rotate so as to reduce the speed of the central shaft, then the brake disc component is started, the brake disc component and the friction disc are rubbed to realize braking, the brake disc component is prevented from being directly contacted with the high-speed friction disc to cause serious abrasion, and the service life of the brake disc is effectively prolonged.

Drawings

FIG. 1 is a schematic structural diagram of an emergency braking device for overspeed lifting of the crane;

fig. 2 is an enlarged view of a portion of a structure at a in fig. 1.

Detailed Description

The invention will be described in detail below with reference to the accompanying drawings and with reference to embodiments, it being noted that the embodiments and features of the embodiments can be combined with each other without conflict.

As shown in fig. 1 to 2, in an embodiment of the emergency braking device for hoisting an overspeed of a crane of the present invention, the emergency braking device includes a support 1, a movable base 2 is slidably disposed on the support 1, an installation frame 3 is fixedly disposed on the movable base 2, a winding drum 4 is rotatably disposed on the installation frame 3, a lifting rope 5 is wound on the winding drum 4, a motor 31 for driving the winding drum 4 to rotate is fixedly disposed on one side of the installation frame 3, a central shaft 41 of the winding drum 4 is coaxially and fixedly connected with a friction disc 6, and a brake disc assembly 7 is correspondingly disposed below the friction disc 6; one end of a central shaft 41 penetrating through a friction disc 6 rotates on one side of a fixing plate 32, a limiting ring 8 is fixedly arranged on one side of the fixing plate 32, a hollow shaft 81 is arranged in the limiting ring 8 in a rotating mode, the hollow shaft 81 is sleeved outside the central shaft 41, a first gear 410 is fixedly arranged on the outer wall of the hollow shaft 81, a second gear 411 is meshed above the first gear 410, a micro hydraulic cylinder assembly 9 used for tightly holding the central shaft 41 is symmetrically and fixedly arranged on one side of the first gear 410, a hall speed measurement assembly 10 and a PLC (programmable logic controller) device 11 electrically connected with the hall speed measurement assembly 10 are arranged on one side of an installation frame 3, specifically, speed measurement can be carried out on the central shaft 41 of a winding drum 3 in real time through the hall speed measurement assembly 10, when the hoisting speed is too fast, the hall speed measurement assembly 10 immediately inputs a pulse signal to the PLC control device 11 to open the micro hydraulic cylinder assembly 10, so as to tightly hold the central shaft 41, the central shaft 41 drives the first gear 410 to rotate, the second gear 411 to rotate so as to slow down the central shaft 41, then, a brake disc assembly 7 is started, and a brake disc assembly 7 rubs against the friction disc 6, so as to avoid direct contact with the brake disc 6 and serious wear, and prolong the service life of the brake disc assembly 73.

In one embodiment of the present application, the brake pad assembly 7 preferably includes an electric push rod 71, a clamping plate 72 fixedly connected to an output end of the electric push rod 71, and a brake pad 73 connected to the clamping plate 72, and specifically, positioning screws are symmetrically screwed on two sides of the clamping plate 72.

In one embodiment of the present application, it is preferable that the outer diameter of the first gear 410 is smaller than that of the second gear 411.

In one embodiment of the present application, preferably, the micro hydraulic cylinder assembly 10 includes a support plate 100 symmetrically fixed on one side of the first gear 410, a micro hydraulic cylinder 101 fixedly connected to the support plate 100, and an arc-shaped clamping plate 102 fixedly connected to an output end of the hydraulic cylinder 101.

In an embodiment of the present application, preferably, a wear-resistant fixture block 12 is coaxially and fixedly disposed on the central shaft 41, and an annular clamping groove corresponding to the arc-shaped clamping plate 102 is disposed on the wear-resistant fixture block 12.

In one embodiment of the present application, preferably, the outer wall of the hollow shaft 81 is fixedly provided with stoppers 810, and the stoppers 810 are spaced at both sides of the limiting ring 8.

In an embodiment of the present application, preferably, the hall velocity measurement assembly 9 includes a magnetic block 91 fixed on the central shaft 41 and a hall element 92 disposed corresponding to the magnetic block 91, and the hall element 92 is electrically connected to the PLC control device 11.

In one embodiment of the present application, a hook 51 is preferably fixedly attached to the bottom of the lifting rope 5.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can be modified, or the central technical features thereof can be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a hoist promotes emergency braking device that exceeds speed limit, includes the support, it is equipped with the removal seat to slide on the support, the fixed mounting bracket that is equipped with on the removal seat, it is equipped with the reel to rotate on the mounting bracket, it has the lifting rope to coil on the reel, the fixed being equipped with in one side of mounting bracket is used for the drive reel pivoted motor, its characterized in that: the central shaft of the winding drum is fixedly connected with a friction disc coaxially, and a brake disc assembly is correspondingly arranged below the friction disc; the center pin runs through the one end of friction disk and rotates in one side of fixed plate, one side of fixed plate is fixed and is equipped with the spacing ring, the spacing ring internal rotation is equipped with the hollow shaft, the hollow shaft cover is located outside the center pin, the outer wall of hollow shaft is fixed and is equipped with first gear, the top meshing of first gear is equipped with the second gear, one side symmetry of first gear is fixed be equipped with be used for hugging closely the miniature hydraulic cylinder subassembly of center pin, one side of mounting bracket be equipped with hall speed measuring component and with hall speed measuring component electric connection's PLC controlling means.

2. The emergency brake device for crane hoisting overspeed according to claim 1, characterized in that: the brake block assembly comprises an electric push rod, a clamping plate fixedly connected with the output end of the electric push rod and a brake block connected with the clamping plate.

3. The emergency brake device for crane hoisting overspeed according to claim 2, characterized in that: the outer diameter of the first gear is smaller than the outer diameter of the second gear.

4. The emergency brake for hoist overspeed as claimed in claim 1, wherein: the miniature hydraulic cylinder component comprises a supporting plate symmetrically fixed on one side of the first gear, a miniature hydraulic cylinder fixedly connected with the supporting plate and an arc-shaped clamping plate fixedly connected with the output end of the hydraulic cylinder.

5. The emergency brake device for crane hoisting overspeed as set forth in claim 4, wherein: the last axle center of center is fixed with the axle center and is equipped with wear-resisting fixture block, seted up on the wear-resisting fixture block with the ring groove that the arc cardboard corresponds.

6. The emergency brake device for crane hoisting overspeed according to claim 5, characterized in that: the outer wall of the hollow shaft is fixedly provided with stop blocks, and the stop blocks are arranged on two sides of the limiting ring at intervals.

7. The emergency brake device for crane hoisting overspeed according to claim 1, characterized in that: the Hall speed measuring assembly comprises a magnetic block fixed on the central shaft and a Hall element arranged corresponding to the magnetic block, and the Hall element is electrically connected with the PLC control device.

8. The emergency brake for hoist overspeed as claimed in claim 1, wherein: the bottom of the lifting rope is fixedly connected with a lifting hook.