Crane hoisting device, crane sheave beam and crane

Abstract

The application relates to the technical field of crane hoisting devices, in particular to a crane hoisting device, a crane pulley beam and a crane, wherein the crane hoisting device comprises a support, the support is provided with a motor, the motor is used for driving the operation of the whole hoisting device; a hoisting assembly, the hoisting assembly comprises a winding drum, a steel wire rope and a lifting hook; a transmission assembly, the transmission assembly is used for transmitting the power of the motor to the winding drum; and a brake assembly, the brake assembly is used for locking and braking the winding drum when detecting that the transmission assembly fails to drive; when the speed of the transmission shaft II is detected to be abnormal, the winding drum brake mechanism is automatically started to forcibly brake and lock the winding drum, the falling of the lifting hook and the hoisted object after the gear in the speed reducer is broken can be effectively prevented, personnel can be prevented from being injured, the winding drum is locked after braking, the second falling of the lifting hook and the hoisted object can be prevented, and the safety of the workers in the maintenance process is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crane hoisting device, in particular to a crane hoisting device, a crane pulley beam and a crane. BACKGROUND

[0002] The crane refers to a multi-action hoisting machinery for vertically lifting and horizontally transporting heavy objects in a certain range, and the hoisting mechanism is an important part of the crane. At present, the brake is generally arranged between the motor and the reducer in the hoisting mechanism. However, when the transmission gear in the reducer is worn out after a long time, the gear will be broken, and the transmission will be disabled. When the above situation occurs, although the crane driver has sent a brake signal, the brake of the crane can only brake the shaft connected with the brake (i.e. the input shaft of the reducer between the motor and the reducer). At this time, there is no brake for the output shaft of the reducer, so the output shaft of the reducer will rotate freely. Since the hook and the hoisted object are connected to the steel wire rope arranged on the winding drum, and the hook and the hoisted object are affected by gravity, the drum connected to the output shaft of the reducer will rotate uncontrollably, which will eventually cause the hook and the hoisted object to fall to the ground, which is very dangerous. SUMMARY

[0003] The present application aims to provide a crane hoisting device, a crane pulley beam and a crane to solve the problems raised in the background.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] On the one hand, a crane hoisting device is provided, comprising:

[0006] A support is provided with a motor, which is used to drive the operation of the whole hoisting device;

[0007] A hoisting assembly comprises a drum, a steel wire rope and a hook, the steel wire rope is wound on the drum, one end of the steel wire rope is connected with the hook, and the hook is used to hoist heavy objects;

[0008] A transmission assembly is used to transmit the power of the motor to the drum; and

[0009] A brake assembly is used to lock and brake the drum when the transmission assembly fails.

[0010] Preferably, the support is provided with a maintenance platform, which is arranged above the motor.

[0011] Preferably, the transmission assembly comprises a speed reducer, a transmission shaft one, a transmission shaft two and a bearing seat, the speed reducer is installed on the support, the transmission shaft one is arranged between the speed reducer and the motor, one end of the transmission shaft two is connected to the speed reducer, the winding drum is sleeved on the transmission shaft two, the winding drum is fixedly connected to the transmission shaft two, the other end of the transmission shaft two is connected to the bearing seat, and the bearing seat is connected to the support.

[0012] Preferably, the brake assembly comprises a motor brake mechanism, a winding drum brake mechanism and a trigger mechanism, the motor brake mechanism is used to stop the transmission shaft one after the driver sends a brake signal, the trigger mechanism is used to start the winding drum brake mechanism when the transmission shaft one is stopped but the transmission shaft two is not stopped, and the winding drum brake mechanism is used to brake the winding drum to stop movement.

[0013] Preferably, the motor brake mechanism comprises a brake and a shaft coupling, the brake is arranged between the motor and the transmission shaft one, the shaft coupling is used to connect the motor output shaft and the transmission shaft one, and the brake is used to brake the shaft coupling after the driver sends a brake signal.

[0014] Preferably, the trigger mechanism comprises a speed sensor one, a speed sensor two, a rotating rod, a conduction block and a switch, the speed sensor one is used to detect the speed of the transmission shaft one, the speed sensor two is used to detect the rotating speed of the winding drum, one end of the rotating rod is connected to the bearing seat, the other end of the rotating rod is connected to the conduction block, and the rotating rod is used to drive the conduction block to rotate to trigger the switch to start the winding drum brake mechanism after the speed sensor two detects an abnormality.

[0015] Preferably, the transmission shaft two is provided with a locking hole, the winding drum brake mechanism comprises a hydraulic push rod, an electromagnetic block, a brake piece, a locking rod, a gear, a rack and a cover plate, the hydraulic push rod is connected to the inner side wall of the bearing seat, the electromagnetic block is connected to the hydraulic push rod, the brake piece is connected to the electromagnetic block, the electromagnetic block is provided with a mounting hole penetrating through the electromagnetic block and the brake piece, the locking rod is arranged in the mounting hole, the gear is arranged in the locking rod, the rack is provided with two, the racks are symmetrically connected to the gear, the racks are in mesh with the gear, and according to the rotation of the gear, the racks will lift the cover plate.

[0016] In one aspect, a crane pulley beam is provided, comprising the crane hoisting device described above.

[0017] Preferably, the crane pulley beam is provided with a track, the bracket bottom is provided with a moving mechanism, the moving mechanism comprises a moving motor and moving wheels, the moving wheels are provided with four, the four moving wheels are symmetrically arranged on both sides of the bracket, and the moving motor is used for driving the moving wheels to move along the track.

[0018] In one aspect, a crane is provided, comprising the crane pulley beam described above.

[0019] Compared with the prior art, the crane has the beneficial effects that: through the arrangement of the brake assembly, the speed of the transmission shaft one and the transmission shaft two can be detected after the driver sends a brake signal, when the speed of the transmission shaft two is abnormal (i.e. the speed of the transmission shaft two is too different from the speed of the transmission shaft one), the drum brake mechanism is automatically started to forcibly brake and lock the drum, the falling of the hook and the hoisted object after the gear in the speed reducer is broken can be effectively prevented, so that the personnel is prevented from being injured, and the safety of the worker during the maintenance process is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0021] Figure 2 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application; Figure 1 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0022] Figure 3 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0023] Figure 4 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0024] Figure 5 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0025] Figure 6 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0026] Figure 7 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0027] Figure 8 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0028] Figure 9 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application; Figure 8 is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application; is a schematic view of the equiaxial structure (the maintenance platform is closed) of the present application;

[0029] In the figure: 1 support, 2 motor, 3 maintenance platform, 4 drum, 5 steel wire rope, 6 lifting hook, 7 speed reducer, 8 transmission shaft one, 9 transmission shaft two, 10 bearing seat, 11 brake, 12 coupling, 13 rotating rod, 14 transmission block, 15 switch, 16 speed sensor one transmitting end, 17 speed sensor one receiving end, 18 speed sensor two transmitting end, 19 speed sensor two receiving end, 20 circuit contact, 21 locking hole, 22 hydraulic push rod, 23 electromagnetic block, 24 brake piece, 25 locking rod, 26 gear, 27 rack, 28 cover plate, 101 moving wheel, 102 moving motor. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0031] Please refer to Figures 1-9 , the present application provides a technical solution:

[0032] A crane hoisting device, as shown in the accompanying drawings of the specification, comprises: Figure 1

[0033] The support 1 is used for mounting other components of the present application, and the support 1 is provided with the motor 2, which is a YZR motor produced by Xuantong Crane Machinery Factory in Xintai City, and is used for driving the operation of the whole hoisting device. The support 1 is provided with the maintenance platform 3, which is rotationally connected to the support 1 and is used for being stepped on by the staff when the hoisting device is maintained. The maintenance platform 3 is arranged above the motor 2. The bottom of the support 1 is provided with the moving wheel 101, which is driven by the moving motor 102, and is used for driving the support 1 to move along the crane pulley beam.

[0034] The lifting assembly comprises the drum 4, the steel wire rope 5 and the lifting hook 6. The drum 4 is used for mounting and storing the steel wire rope 5. The steel wire rope 5 is wound on the drum 4 and is used for cooperating with the lifting hook 6 to lift the heavy object. One end of the steel wire rope 5 is connected with the lifting hook 6, and the lifting hook 6 is used for lifting the heavy object.

[0035] ​The transmission assembly is used to transmit power of the motor 2 to the winding drum 4. The transmission assembly comprises a speed reducer 7, a transmission shaft 1 8, a transmission shaft 2 9 and a bearing seat 10. The speed reducer 7 is used to transmit torque transmitted by the motor 2 to the transmission shaft 2 9, and is installed on the support 1. The transmission shaft 1 8 is arranged between the speed reducer 7 and the motor 2. The transmission shaft 2 9 is connected to the speed reducer 7 at one end, and the winding drum 4 is sleeved on the transmission shaft 2 9. The winding drum 4 is fixedly connected to the transmission shaft 2 9. The other end of the transmission shaft 2 9 is connected to the bearing seat 10. The bearing seat 10 is connected to the support 1, and is used to install the winding drum braking mechanism and the triggering mechanism. The bearing seat 10 also supports the winding drum 4.

[0036] The braking assembly is used to lock and brake the winding drum when it is detected that the transmission assembly fails to drive. The braking assembly comprises a motor braking mechanism, a winding drum braking mechanism and a triggering mechanism. The motor braking mechanism is used to stop and brake the transmission shaft 1 8 in an emergency. The triggering mechanism is used to start the winding drum braking mechanism when it is detected that the transmission shaft 1 8 is stopped but the transmission shaft 2 9 is not stopped. The winding drum braking mechanism is used to brake and stop the movement of the winding drum.

[0037] The motor braking mechanism comprises a brake 1 1 and a shaft coupling 1 2. The brake 1 1 is arranged between the motor 2 and the transmission shaft 1 8. The brake 1 1 is a hydraulic disc brake produced by Jiaozuo Hongqiao Brake Co., Ltd. The shaft coupling 1 2 is used to connect the output shaft of the motor 2 and the transmission shaft 1 8. The brake 1 1 is used to brake the shaft coupling 1 2 after a driver sends a braking signal. Since the shaft coupling 1 2 and the transmission shaft 1 8 are connected to each other, the transmission shaft 1 8 is also braked.

[0038] The triggering mechanism includes speed sensor one, speed sensor two, rotating rod 13, conductive block 14, and switch 15. Speed ​​sensor one and speed sensor two are both E3F-20C1 / 20L type photoelectric sensors manufactured by Wenzhou Sandashi Pneumatic Technology Co., Ltd. The transmitting end 16 of speed sensor one is located on the drive shaft one 8, and the receiving end 17 of speed sensor one is located on the side wall of brake 11. Therefore, the rotational speed of drive shaft one 8 can be calculated based on the docking time of speed sensor one's transmitting end 16 and speed sensor one's receiving end 17. When speed sensor one does not detect docking of speed sensor one's transmitting end 16 and speed sensor one's receiving end 17 for a long time, it indicates that drive shaft one 8 has stopped moving. Speed ​​sensor one is used to detect the speed of drive shaft one 8, and speed sensor two is used to detect the rotational speed of the drum. The transmitting end 18 of speed sensor two and... Speed ​​sensor 2 receiver 19 is respectively set on bearing housing 10 and drive shaft 2 9. Its working principle is the same as speed sensor 1. The rotational speed of drive shaft 2 9 can be calculated based on the docking time between speed sensor 2 transmitter 18 and speed sensor 2 receiver 19. When speed sensor 2 does not detect docking between speed sensor 2 transmitter 18 and speed sensor 2 receiver 19 for a long time, it indicates that drive shaft 2 9 has stopped moving. One end of rotating rod 13 is rotatably connected to bearing housing 10. Rotating rod 13 is driven by a motor. When it detects that drive shaft 1 has stopped while drive shaft 2 9 is moving, the drive motor of rotating rod 13 will start and drive rotating rod 13 to rotate. Rotating rod 13 is made of hard rubber. Hard rubber is non-conductive, so there is no current inside rotating rod 13 during actual use. The other end of rotating rod 13 is connected to conductive block 14, as shown in the instruction manual. Figure 6 As shown, the conductive block 14 has a "Y" shaped structure. The rotating rod 13 is used to drive the conductive block 14 to rotate and make contact with the circuit contact 20 after the speed sensor detects an abnormality. The rotating rod 13 will trigger the switch 15 to start the drum braking mechanism. The switch 15 is a self-resetting switch purchased from the Yizhi Electric flagship store. When in use, the rotating rod 13 and the switch 15 are in contact with each other, and the conductive block 14 will not contact the switch 15.

[0039] The second drive shaft 9 has locking holes 21, which are evenly spaced around the side wall of the second drive shaft 9. The drum braking mechanism includes a hydraulic push rod 22, an electromagnetic block 23, a brake pad 24, a locking rod 25, a gear 26, a rack 27, and a cover plate 28. The hydraulic push rod 22 is connected to the inner wall of the bearing seat 10. The hydraulic push rod 22 is used to push the electromagnetic block 23 and the brake pad 24 to move, thereby locking the second drive shaft 9, as shown in the attached instruction manual. Figure 7As shown, the electromagnetic block 23 is fixedly connected to the hydraulic push rod 22, the brake piece 24 is fixedly connected to the electromagnetic block 23, the circuit of the electromagnetic block 23 is connected by the conduction block 14, and the power supply of the electromagnetic block 23 continuously increases the current input into the electromagnetic block 23 to increase the magnetic force. The electromagnetic block 23 is provided with a mounting hole for mounting the lock rod 25, the mounting hole penetrates the electromagnetic block 23 and the brake piece 24, the lock rod 25 is arranged in the mounting hole, the lock rod 25 is telescopic, the lock rod 25 is also driven by hydraulic pressure, the gear 26 is arranged inside the lock rod 25, the gear 26 is used to drive the rack 27 to move, the rack 27 is provided with two, the rack 27 is symmetrically connected to the gear 26, the rack 27 and the gear 26 are mutually engaged, according to the rotation of the gear 26, the rack 27 will lift the cover plate 28, as shown in the accompanying drawings Figure 8 As shown, the front end of the lock rod 25 is rounded, and when the cover plate 28 is lifted, it is tangent to the round angle. This design can effectively prevent the lock rod 25 from failing to lock due to misalignment with the locking groove.

[0040] Working principle: when the crane hook 6 falls uncontrollably, the motor 2 is turned off, the brake 11 is started to slow down the transmission shaft 8, the speed sensor 1 detects the speed of the transmission shaft 8, and when the speed sensor 2 still receives signals while the transmission shaft 8 has stopped, the rotating rod 13 rotates to drive the conduction block 14 to connect the circuit and power the electromagnetic block 23. At this time, the magnetic force of the electromagnet will immediately attract the brake piece 24 to the surface of the transmission shaft 9, and the rotating block will resist the switch 15. The inside of the hydraulic push rod 22 will gradually fill with hydraulic oil to drive the brake block to brake the transmission shaft 9, and the double action of magnetic force and hydraulic pressure makes the transmission shaft 9 brake urgently. After the speed sensor 2 detects that the speed of the transmission shaft 9 is zero, the hydraulic push rod 22 slowly releases the pressure, the lock rod 25 increases the pressure to insert into the locking hole 21, and the gear 26 drives the rack 27 to move to lift the cover plate 28 while the lock rod 25 is elongated. After that, the staff will carry out maintenance.

[0041] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A hoist hoisting device, characterized in that, The crane hoisting device comprises a support, a hoisting assembly, a transmission assembly, and a brake assembly. The support is provided with an electric motor for driving the operation of the whole hoisting device. The hoisting assembly comprises a drum, a steel wire rope, and a hook. The steel wire rope is wound around the drum, and one end of the steel wire rope is connected with the hook. The hook is used for hoisting heavy objects. The transmission assembly is used for transmitting the power of the electric motor to the drum. The brake assembly is used for locking and braking the drum when the transmission assembly fails. The transmission assembly comprises a speed reducer, a transmission shaft one, a transmission shaft two, and a bearing seat. The brake assembly comprises a motor brake mechanism, a drum brake mechanism, and a trigger mechanism.

2. A hoist arrangement for a crane according to claim 1, characterized in that The motor brake mechanism is used for stopping and braking the transmission shaft one after the driver sends a brake signal.

3. A hoist arrangement for a crane according to claim 1, characterized in that: The trigger mechanism is used for starting the drum brake mechanism when the transmission shaft one stops but the transmission shaft two does not stop.

4. A hoist arrangement for a crane according to claim 1, characterized in that: The drum brake mechanism is used for braking and stopping the movement of the drum.

5. A hoist arrangement for a crane according to claim 1, characterized in that: The transmission shaft two is provided with a locking hole.

6. A crane sheave beam, characterized by The drum brake mechanism comprises a hydraulic push rod, an electromagnetic block, a brake piece, a locking rod, a gear, a rack, and a cover plate. The hydraulic push rod is connected to the inner side wall of the bearing seat. The electromagnetic block is connected to the hydraulic push rod. The brake piece is connected to the electromagnetic block. The electromagnetic block is provided with a mounting hole. The mounting hole penetrates the electromagnetic block and the brake piece. The locking rod is arranged in the mounting hole. The gear is arranged inside the locking rod. The rack is provided with two racks. The two racks are symmetrically connected to the gear. The rack and the gear are in mesh with each other. According to the rotation of the gear, the rack will lift the cover plate. The support is provided with a maintenance platform. The maintenance platform is arranged above the electric motor. The speed reducer is mounted on the support. The transmission shaft one is arranged between the speed reducer and the electric motor. One end of the transmission shaft two is connected to the speed reducer. The drum is sleeved on the transmission shaft two. The transmission shaft two is fixedly connected to the drum. The other end of the transmission shaft two is connected to the bearing seat. The bearing seat is connected to the support. The motor brake mechanism comprises a brake and a shaft coupling. The brake is arranged between the electric motor and the transmission shaft one. The shaft coupling is used for connecting the output shaft of the electric motor and the transmission shaft one. The brake is used for braking the shaft coupling after the driver sends a brake signal. The trigger mechanism comprises a speed sensor one, a speed sensor two, a rotating rod, a conduction block, and a switch. The speed sensor one is used for detecting the speed of the transmission shaft one. The speed sensor two is used for detecting the rotating speed of the drum. One end of the rotating rod is connected to the bearing seat. The other end of the rotating rod is connected to the conduction block. The rotating rod is used for driving the conduction block to rotate and triggering the switch to start the drum brake mechanism after the speed sensor two detects an abnormality. The crane hoisting device comprises the crane hoisting device according to any one of claims 1-5.

7. A crane sheave beam according to claim 6, characterised in that: The crane pulley beam is provided with a track, the support bottom is provided with a moving mechanism, the moving mechanism comprises a moving motor and moving wheels, the moving wheels are provided with four, the four moving wheels are symmetrically arranged on both sides of the support, and the moving motor is used for driving the moving wheels to move along the track.

8. A crane, characterized in that The crane pulley beam comprises the crane pulley beam according to claim 7.

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