Three-brake electric hoist
By introducing three brakes and a traveling mechanism into the electric hoist, the safety hazards when the hoisting motor goes out of control are solved, emergency braking and safety are improved, and losses from the rapid falling of goods are avoided.
Patent Information
- Application Number
- CN202520071793.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing electric hoists rely solely on the lifting motor for braking, which is ineffective and poses a safety hazard. When the hook lifts a heavy object and it falls rapidly, it may cause damage to personnel and goods on the ground.
A three-brake electric hoist was designed, including a first, second, and third brake. The mechanical structure provides emergency braking in case the hoisting motor goes out of control. Combined with the synchronous rotation of the traveling mechanism and the transmission rod gear, the deviation of the drive wheel is reduced, thus improving safety.
When the hoisting motor malfunctions, the hoisting drum is quickly stopped to prevent the goods from falling rapidly, thus improving safety and reducing property damage.
Smart Images
Figure CN223592269U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the crane technical field, especially relate to a three brake electric hoist. BACKGROUND
[0002] The crane refers to the vertical lifting and horizontal transport heavy goods in a certain range multi-action hoisting machinery, also called the overhead crane, the navigation, the crane, and the electric hoist is a kind of crane, installed on the overhead crane, gantry crane, electric hoist has small volume, light weight, simple operation, convenient to use etc. Characteristics, used in industrial and mining enterprises, warehouse, wharf and other places, the existing electric hoist generally includes the running gear assembled under the main girder of crane and the lifting drum and lifting motor assembled on the frame, and the lifting hook connected to the lifting drum through the wire rope, the lifting drum is rotated by the lifting motor, the wire rope is wound and the lifting hook is hauled to lift the heavy object up and down. But in the prior art, due to the simple structure of electric hoist, only rely on the lifting motor braking, when the motor is damaged or other sudden situation, the hook takes the heavy object sharply falls, will cause damage to the ground personnel and goods, therefore in the prior art, only through the motor to brake the lifting drum, there is not small safety hazard, will cause the damage of goods and other losses. CONTENT OF THE UTILITY MODEL
[0003] The utility model discloses in order to solve the technical problem that the existing electric hoist only through motor brake to hoisting drum, brake effect is not ideal, provide a kind of three braking electric hoist, including the frame of supporting effect, be equipped with travelling mechanism on the frame, and the frame includes two vertical and interval arrangement support frame, two support frame between being equipped with two symmetrical support beam, the both ends of support beam are detachably fixed on support frame, can be adjusted the distance between two support frames according to requirement, make it applicable to different width crane walking track. Travelling mechanism includes the driving wheel and driven wheel rotatable assembled on the frame, and the driving wheel is located at the left end of support frame, and the driving wheel and driven wheel roll press fit on the walking track below crane girder, and walking motor is fixed on the frame, and walking motor is connected with the driving wheel transmission, and the driving wheel is all equipped with transmission gear, and the transmission lever rotatable assembled between two support frames is arranged horizontally, and the both ends of transmission lever are all fixed with the transmission gear meshing with the driving wheel, and the end of transmission lever is connected with walking motor transmission, and walking motor is started, and walking motor drives the driving wheel on two support frames synchronous rotation through transmission gear on transmission lever, can reduce the walking deviation of two driving wheels, reduce the occurrence of gnawing or derailment between driving wheel and walking track, improve safety. Walking mechanism is assembled on the walking track below crane support beam, and the frame on the side of walking track is equipped with electrical control system, and electrical control system is prior art, including PLC controller, transformer and some electrical components, mainly control lifting mechanism, travelling mechanism etc. The frame on the other side of walking track is equipped with lifting mechanism, and lifting mechanism includes lifting drum, and steel wire rope slot is formed in lifting drum, and support plate is fixed on the frame at the both ends of lifting drum, and the both ends of lifting drum rotatable assembly are arranged on support plate, and lifting motor is arranged below lifting drum, and the end of lifting motor is fixed on support plate, and the outside of support plate on the one end of lifting drum is fixed with speed reducer, and lifting motor is connected with lifting drum transmission through speed reducer, when using, lifting motor is started, and lifting motor drives lifting drum to rotate, and lifting drum moves up and down through winding steel wire rope to drag hook. First brake is assembled on the outside of speed reducer, and second brake is fixed on the left end support plate of lifting drum, and second brake selects lifting height limiter, and second brake is connected with lifting drum transmission, and first brake and second brake are all connected with power supply and PLC controller through cable.The right end of the lifting drum is equipped with a third brake, the third brake comprises a first supporting wheel and a second supporting wheel fixed on the right end of the lifting drum, the first supporting wheel is provided with uniformly distributed circular arc grooves in the circumferential direction, the second supporting wheel is provided with a clamping groove in the circumferential direction, a clamping claw supporting frame is fixed on the supporting plate, an L-shaped clamping claw is rotatably arranged on the clamping claw supporting frame through a supporting shaft, the lower end of the clamping claw is rotatably arranged with a rotating wheel matched with the circular arc groove on the first supporting wheel, the upper end of the clamping claw is provided with a clamping part matched with the clamping groove on the second supporting wheel, an upper fixed rod is fixed on the middle part of the clamping claw, a lower fixed rod is fixed on the supporting plate below the clamping claw, and a spring is arranged between the upper fixed rod and the lower fixed rod to press the rotating wheel against the circular arc groove; when the lifting motor drives the lifting drum to rotate clockwise, the first supporting wheel and the second supporting wheel rotate with the lifting drum, at this time, the rotating wheel rotates along the circular arc groove on the first supporting wheel and enters another circular arc groove from one circular arc groove, the clamping groove on the second supporting wheel moves in the same direction relative to the clamping claw, and the clamping part on the clamping claw does not enter the clamping groove to lock the second supporting wheel, so that the lifting drum is not locked when rotating clockwise; under the action of the lifting motor, the steel wire rope is released, the lifting drum rotates counterclockwise at a uniform speed when the hook and the cargo are moved downward, at this time, the rotating wheel rolls along the circular arc groove on the first supporting wheel, the clamping part does not clamp in the clamping groove, but when the lifting motor loses control, the hook and the cargo rapidly descend, the steel wire rope pulls the lifting drum to rotate counterclockwise at a high speed, at this time, the first supporting wheel and the second supporting wheel rotate rapidly, under the action of centrifugal force and inertia, the rotating wheel is lifted by the first supporting wheel, the rotating wheel is separated from the first supporting wheel, the spring is stretched, the clamping part of the clamping claw rotates into the clamping groove and clamps and fixes the second supporting wheel, the second supporting wheel and the lifting drum are rapidly stopped, the safety is improved. The lower end of the frame is provided with a hook connected to the lifting drum through a steel wire rope, a balance wheel is rotatably arranged on the frame, one end of the steel wire rope is fixed on the supporting frame, and the other end of the steel wire rope is connected to the lifting drum through a movable pulley group around the balance wheel and the top end of the hook.
[0004] Preferably, a rail clamping block is detachably fixed at both ends of the frame, and the rail clamping block is provided with a clamping groove matched with the rail.
[0005] Preferably, a protective shell is arranged outside the lifting drum, and the shell is fixed on the supporting frame.
[0006] The above scheme has the following advantages:
[0007] The first supporting wheel, the second supporting wheel and the clamping grab are arranged in a mechanical structure, which can perform emergency braking in the case that the lifting motor is out of control and the lifting drum releases the steel wire rope at high speed, thereby avoiding property loss caused by rapid falling of goods and improving safety; the walking mechanism is arranged to drive the vehicle frame to freely move along the walking track below the crane main beam, the transmission rod and the transmission gear are arranged, the walking motor drives the driving wheels on the two supporting frames to synchronously rotate through the transmission gear on the transmission rod, the walking deviation of the two driving wheels is reduced, the biting or derailing between the driving wheels and the walking track is reduced, and safety is improved; the first brake and the second brake are arranged to detect and brake, and to control the motor to stop. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 A perspective structural diagram of the utility model Figure One ;
[0009] Figure 2 A perspective structural diagram of the utility model Figure Two ;
[0010] Figure 3 A front view structural diagram of the utility model;
[0011] Figure 4 A left view structural diagram of the utility model;
[0012] Figure 5 A top view structural diagram of the utility model;
[0013] Figure 6 A structural diagram of the third brake Figure One ;
[0014] Figure 7 A structural diagram of the third brake Figure Two .
[0015] Fig. 1, vehicle frame; 2, walking mechanism; 3, electrical control system; 4, lifting mechanism; 5, third brake; 11, supporting frame; 12, supporting beam; 13, anti-derailing clamping block; 14, balancing wheel; 15, shell; 21, driving wheel; 22, driven wheel; 23, transmission rod; 24, transmission gear; 25, walking motor; 41, supporting plate; 42, lifting drum; 43, lifting motor; 44, speed reducer; 45, first brake; 46, second brake; 47, lifting hook; 48, steel wire rope; 49, movable pulley set; 51, first supporting wheel; 52, second supporting wheel; 53, clamping grab supporting frame; 54, clamping grab; 55, rotating wheel; 551, supporting shaft; 56, clamping part; 57, spring; 571, upper fixed rod; 572, lower fixed rod. DETAILED DESCRIPTION
[0016] As Figures 1-7As shown, a three-brake electric hoist, including a supporting frame 1, the frame 1 is provided with a walking mechanism 2, the frame 1 includes two vertical and spaced apart support frames 11, two support beams 12 are arranged symmetrically between the two support frames 11, the two ends of the support beam 12 are detachably fixed on the support frame 11, the distance between the two support frames 11 can be adjusted according to the requirements, so that it is suitable for different width of the crane walking track. The walking mechanism 2 includes a driving wheel 21 and a driven wheel 22 rotatably assembled on the frame 1, the driving wheel 21 is located at the left end of the support frame 11, the driving wheel 21 and the driven wheel 22 are rollingly matched on the walking track below the crane girder, the frame 1 is fixed with a walking motor 25, the walking motor 25 is in transmission connection with the driving wheel 21, two driving wheels 21 are provided with transmission teeth, and a horizontal transmission rod 23 is rotatably assembled between the two support frames 11, the two ends of the transmission rod 23 are fixed with transmission gears 24 engaged with the driving wheel 21, one end of the transmission rod 23 is in transmission connection with the walking motor 25, the walking motor 25 is started, the walking motor 25 drives the driving wheels 21 on the two support frames 11 to rotate synchronously through the transmission gears 24 on the transmission rod 23, which can reduce the walking deviation of the two driving wheels 21, reduce the occurrence of biting or derailing between the driving wheel 21 and the walking track, and improve the safety. The walking mechanism 2 is assembled on the walking track below the crane support beam, and the frame 1 on one side of the walking track is provided with an electrical control system 3, the electrical control system 3 is prior art, including a PLC controller, a transformer and some electrical components, mainly controlling the lifting mechanism 4 and the walking mechanism 2. The frame on the other side of the walking track is provided with a lifting mechanism 4, the lifting mechanism 4 includes a lifting drum 42, the lifting drum 42 is provided with a steel wire rope groove, the frame 1 at both ends of the lifting drum 42 is fixed with a support plate 41, the both ends of the lifting drum 42 are rotatably assembled on the support plate 41, the lifting drum 42 is provided below with a lifting motor 43, the end of the lifting motor 43 is fixed on the support plate 41, the outer side of the support plate 41 at one end of the lifting drum 42 is fixed with a speed reducer 44, the lifting motor 43 is in transmission connection with the lifting drum 42 through the speed reducer 44, in use, the lifting motor 43 is started, the lifting motor 43 drives the lifting drum 42 to rotate, the lifting drum 42 moves up and down through winding the steel wire rope 48 to pull the hook 47. The outer side of the speed reducer 44 is assembled with a first brake 45, the left end support plate 41 of the lifting drum 42 is fixed with a second brake 46, the second brake 46 is selected as a lifting height limiter, the second brake 46 is in transmission connection with the lifting drum 42, the first brake 45 and the second brake 46 are connected with the power supply and the PLC controller through the cable.The right end of the hoisting drum 42 is equipped with a third brake 5, which comprises a first supporting wheel 51 fixed on the right end of the hoisting drum 42 and a second supporting wheel 52, the first supporting wheel 51 is provided with uniformly distributed circular arc grooves in the circumferential direction, the second supporting wheel 52 is provided with clamping grooves in the circumferential direction, the supporting plate 41 is fixed with a clamping claw supporting frame 53, the clamping claw supporting frame 53 is rotatably equipped with an L-shaped clamping claw 54 through a supporting shaft 551, the lower end of the clamping claw 54 is rotatably equipped with a rotating wheel 55 matched with the circular arc grooves on the first supporting wheel 51, the upper end of the clamping claw 54 is provided with a clamping part 56 matched with the clamping grooves on the second supporting wheel 52, and the middle part of the clamping claw 54 is fixed with an upper fixed rod 571, the supporting plate 41 below the clamping claw 54 is fixed with a lower fixed rod 572, and the spring 57 for keeping the rotating wheel pressed against the circular arc grooves is arranged between the upper fixed rod 571 and the lower fixed rod 572. In use, when the hoisting motor 43 drives the hoisting drum 42 to rotate clockwise, the first supporting wheel 51 and the second supporting wheel 52 rotate with the hoisting drum 42, at this time, the rotating wheel 55 rotates along the circular arc grooves on the first supporting wheel 51, and enters another circular arc groove from one circular arc groove, the clamping grooves on the second supporting wheel 52 move in the same direction relative to the clamping claw 54, and the clamping part 56 on the clamping claw 54 does not enter the clamping grooves to clamp the second supporting wheel 52, so the hoisting drum 42 does not get stuck when rotating clockwise. Under the action of the hoisting motor 43, the steel wire rope is released, and when the lifting hook 47 and the cargo are lowered, the hoisting drum 42 rotates counterclockwise at a uniform speed, at this time the rotating wheel 55 rolls along the circular arc grooves on the first supporting wheel 51, and the clamping part 56 does not get stuck in the clamping grooves, but when the hoisting motor 43 loses control, the lifting hook 47 and the cargo rapidly descend, the steel wire rope 48 pulls the hoisting drum 42 to rotate counterclockwise at high speed, at this time the first supporting wheel 51 and the second supporting wheel 52 rotate rapidly, under the action of centrifugal force and inertia, the rotating wheel 55 is lifted by the first supporting wheel 51, the rotating wheel 55 will be out of contact with the first supporting wheel 51, the spring 57 is stretched, the clamping part 56 of the clamping claw 54 rotates into the clamping grooves, and clamps and fixes the second supporting wheel 52, rapidly stops the second supporting wheel 52 and the hoisting drum 42, to avoid the hoisting drum 42 from continuously releasing the steel wire rope, and improves the safety. The lower end of the vehicle frame 1 is provided with a lifting hook 47, the lifting hook 47 is connected to the hoisting drum 42 through a steel wire rope 48, the vehicle frame 1 is rotatably equipped with a balance wheel 14, one end of the steel wire rope 48 is fixed on the supporting frame 11, the other end of the steel wire rope 48 passes through the balance wheel 14 and the dynamic pulley group 49 at the top of the lifting hook 47 and is connected to the hoisting drum 42.
[0017] Preferably, the vehicle frame 1 is detachably fixed with anti-derailing clamping blocks 13 at both ends, and the anti-derailing clamping blocks 13 are provided with clamping grooves matched with the running tracks.
[0018] Preferably, the hoisting drum 42 is provided with a protective casing 15 outside, and the casing 15 is fixed on the support frame 11.
[0019] Use process:
[0020] In use, the walking motor 25 is started, the walking motor 25 drives the driving wheel 21 to rotate through the transmission gear 24 on the transmission rod 23, the driving wheel 21 moves freely along the walking track below the crane girder, so that the position of the vehicle frame 1 can be adjusted, when the lifting hook 47 is moved above the goods, the walking motor 25 is stopped, the lifting motor 43 is started, the lifting motor 43 drives the lifting drum 42 to rotate counterclockwise, the lifting drum 42 releases the steel wire rope 48, the lifting hook 47 falls beside the goods and hangs the goods under the operation of the staff, and then the lifting motor 43 is started in reverse again, when the lifting motor 43 drives the lifting drum 42 to rotate clockwise, the first supporting wheel 51 and the second supporting wheel 52 rotate with the lifting drum 42, at this time, the rotating wheel 55 rotates along the arc-shaped groove on the first supporting wheel 51, and enters another arc-shaped groove from one arc-shaped groove, the clamping groove on the second supporting wheel 52 moves relative to the clamping claw 54 in the same direction, and the clamping part 56 on the clamping claw 54 will not enter the clamping groove to lock the second supporting wheel 52, so that the lifting drum 42 will not be locked when rotating clockwise; under the action of the lifting motor 43, the steel wire rope 48 is released, and when the lifting hook 47 and the goods are moved downward, the lifting drum 42 rotates counterclockwise at a constant speed, at this time, the rotating wheel 55 rolls along the arc-shaped groove on the first supporting wheel 51, and the clamping part 56 will not be clamped in the clamping groove, but when the lifting motor 43 loses control, the lifting hook 47 and the goods rapidly fall, the steel wire rope 48 pulls the lifting drum 42 to rotate counterclockwise at high speed, at this time, the first supporting wheel 51 and the second supporting wheel 52 rotate rapidly, under the action of centrifugal force and inertia, the rotating wheel 55 is lifted by the first supporting wheel 51, the rotating wheel 55 will be separated from the first supporting wheel 51, the spring 57 is stretched, the clamping part 56 of the clamping claw 54 rotates into the clamping groove, and the second supporting wheel 52 is clamped and fixed, the second supporting wheel 52 and the lifting drum 42 are rapidly stopped, so that the lifting drum 42 continues to release the steel wire rope, and the safety is improved.
[0021] In the description of the utility model, it is understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.
[0022] The above examples are illustrative of the present application and are not limiting. Any simple modifications of the present application are within the scope of the present application.
Claims
1. A three-brake electric hoist, comprising a supporting frame, a traveling mechanism mounted on the frame, the traveling mechanism being mounted on a traveling rail below a crane support beam, an electrical control system mounted on one side of the frame along the traveling rail, and a lifting mechanism mounted on the frame on the other side of the traveling rail, characterized in that: The lifting mechanism comprises a lifting drum, support plates fixed on both ends of the car frame, the lifting drum rotatably assembled on the support plates at both ends, a lifting motor arranged below the lifting drum, the end of the lifting motor fixed on the support plate, a speed reducer fixed on the outer side of the support plate at one end of the lifting drum, the lifting motor in transmission connection with the lifting drum through the speed reducer, the first brake assembled on the outer side of the speed reducer, the second brake fixed on the support plate at the left end of the lifting drum, the second brake in transmission connection with the lifting drum, the third brake assembled on the right end of the lifting drum, the third brake comprising a first supporting wheel and a second supporting wheel fixed on the right end of the lifting drum, the first supporting wheel with uniformly arranged arc-shaped grooves circumferentially arranged on the first supporting wheel, the second supporting wheel with a clamping groove circumferentially arranged on the second supporting wheel, a clamping support frame fixed on the support plate, the clamping support frame with an L-shaped clamping claw rotatably assembled on the support shaft, the lower end of the clamping claw rotatably assembled with a rotating wheel matched with the arc-shaped groove on the first supporting wheel, the upper end of the clamping claw provided with a clamping part matched with the clamping groove on the second supporting wheel, the middle part of the clamping claw fixed with an upper fixed rod, the lower fixed rod fixed on the support plate below the clamping claw, the spring arranged between the upper fixed rod and the lower fixed rod for keeping the rotating wheel pressed against the arc-shaped groove, the hook arranged below the car frame, and the hook connected to the lifting drum through the steel wire rope.
2. A three-braking electric hoist according to claim 1, characterized in that: The car frame comprises two vertically and spaced support frames, two symmetric support beams arranged between the two support frames, and the two ends of the support beam detachably fixed on the support frame.
3. A three-braking electric hoist according to claim 2, characterized in that: The walking mechanism comprises a driving wheel and a driven wheel rotatably assembled on the car frame, the driving wheel located at the left end of the support frame, the driving wheel and the driven wheel rollingly matched on the walking track below the crane girder, the walking motor fixed on the car frame, and the walking motor in transmission connection with the driving wheel.
4. A three-braking electric hoist according to claim 3, characterized in that: The two driving wheels are provided with transmission gear teeth, and the transmission rod is rotatably assembled horizontally between the two support frames, the two ends of the transmission rod are fixed with transmission gears engaged with the driving wheels, and one end of the transmission rod is in transmission connection with the walking motor.
5. A three-braking electric hoist according to claim 2, characterized in that: The balance wheel is rotatably assembled on the car frame, one end of the steel wire rope is fixed on the support frame, and the other end of the steel wire rope is connected to the lifting drum through the balance wheel and the movable pulley group at the top end of the hook.
6. A three-braking electric hoist according to claim 1, characterized in that: The anti-derailing clamping block is detachably fixed at both ends of the car frame, and the clamping groove matched with the walking track is arranged on the anti-derailing clamping block.
7. A three-braking electric hoist according to claim 1, characterized in that: The second brake is selected as the lifting height limiter, and the first brake and the second brake are connected to the power supply and the PLC controller through the cable.