Winding device of crane

Abstract

The utility model discloses a hoisting device of a crane, which comprises a mounting frame, vertical plates fixed on the left side and the right side of the upper end of the mounting frame, a hoisting shaft rotationally connected between the vertical plates and a motor fixedly mounted at the left end of the left vertical plate, the output end of the motor is connected with the hoisting shaft, and the right end of the hoisting shaft penetrates through the right vertical plate and is fixedly provided with a driving gear. When the winding shaft of the winding device of the crane rotates, the driving gear can be driven to rotate, the number of turns of rotation of the driving gear is detected through the rotary encoder, so that the number of turns of rotation of the winding shaft is detected, and when the winding shaft rotates by multiple turns to put down a lifted object, the rotation of the winding shaft reaches a threshold value set in the controller, so that the lifting object is put down. The controller can control the electric push rod to push the sliding block so as to drive the movable frame and the brake seat to synchronously move leftwards, so that the brake seat and the brake pad are rubbed to achieve a damping effect, and therefore, when goods are unloaded, the buffering and speed reducing effects are achieved on the goods, and damage to the winch caused by too large impact is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a hoisting device of a crane. Background Art

[0002] The hoisting device of a crane is an important part of the crane. At present, during the operation of the crane, mechanical failures may occur, which require emergency braking for maintenance. If a failure occurs when the hoisted object of the crane is raised to a high place, it may be dangerous and the hoisted object needs to be lowered for maintenance. At present, the speed of lowering the hoisted object is mostly the same as the winch speed, which results in a high speed that easily causes a large impact on the winch and damages the winch. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a hoisting device for a crane to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a hoisting device of a crane, comprising a mounting frame, vertical plates fixed on the left and right sides of the upper end thereof, a hoisting shaft rotatably connected between the vertical plates, and a motor fixedly installed at the left end of the vertical plate on the left, the output end of the motor is connected to the hoisting shaft, the right end of the hoisting shaft passes through the vertical plate on the right and is fixed with a driving gear, a machine cover is fixed at the right end of the vertical plate on the right and located outside the driving gear, a rotary encoder is fixedly installed inside the machine cover, the input shaft at the left end of the rotary encoder is fixed to the driving gear, a shaft rod is connected to the bearing at the right end of the vertical plate on the right and located below the driving gear, a driven gear is fixed to the outside of the shaft rod, the driven gear is meshed and connected with the driving gear, a brake pad is embedded and fixed on the outside of the right end of the driven gear, a slide seat is fixed on the lower side of the right end of the vertical plate on the right, a controller connected to the rotary encoder is installed at the rear end of the slide seat, and a brake mechanism connected to the controller is provided on the slide seat.

[0005] Preferably, the brake mechanism includes an electric push rod, a movable frame and a brake seat, the movable frame is slidably connected to the upper end of the slide, the brake seat is fixed to the upper end of the movable frame, the brake seat is in contact with the brake pad, the electric push rod is installed at the right end of the slide, and the power end of the electric push rod is connected to the movable frame.

[0006] Preferably, a slideway is provided at the upper end of the slide seat, a slider is slidably connected inside the slideway, the slider is fixed to the lower end of the movable frame, and the power end of the electric push rod passes through the slideway and is connected to the slider.

[0007] Preferably, the rotary encoder is connected to a controller signal, and the controller is connected to an electric push rod signal.

[0008] Preferably, an outflow pipe is fixed on the upper end of the hood, an oil storage hopper connected thereto is fixed on the upper end of the outflow pipe, an oil dripping port is opened on the upper end of the hood and below the outflow pipe, and the outflow pipe is connected to the oil dripping port.

[0009] Preferably, the bottom opening diameter of the oil drip port is smaller than the top opening diameter of the oil drip port, and a sealing bead is arranged inside the oil drip port. The diameter of the sealing bead is larger than the bottom opening diameter of the oil drip port, and the diameter of the sealing bead is smaller than the inner diameter of the oil drip port.

[0010] The utility model provides a hoisting device of a crane, which has the following beneficial effects: when the hoisting shaft of the hoisting device of the crane rotates, it can drive the driving gear to rotate, and a rotary encoder is used to detect the number of rotations of the driving gear, thereby detecting the number of rotations of the hoisting shaft, and when the hoisting shaft is rotated multiple times to lower the hoisted object, as the number of rotations of the hoisting shaft reaches a threshold value set in a controller, the controller can control an electric push rod to push a slider, thereby driving a moving frame and a brake seat to move left synchronously, so that the brake seat and the brake pad rub to play a damping role, so that when unloading the goods, the goods are buffered and decelerated to avoid damage to the hoist due to excessive impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is an overall schematic diagram of the utility model;

[0012] Figure 2 It is a right side cross-sectional schematic diagram of the utility model as a whole;

[0013] Figure 3 For this utility model Figure 2 A partial enlarged view of .

[0014] In the figure: 1-mounting frame, 2-vertical plate, 3-winch shaft, 4-motor, 5-machine cover, 6-outlet pipe, 7-oil storage bucket, 8-axle rod, 9-driven gear, 10-brake pad, 11-slide seat, 12-controller, 13-slideway, 14-slider, 15-electric push rod, 16-movable frame, 17-brake seat, 18-rotary encoder, 19-driving gear, 20-oil drip port, 21-blocking bead. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-Figure 3A hoisting device of a crane includes a mounting frame 1, vertical plates 2 fixed on the left and right sides of the upper end thereof, a hoisting shaft 3 rotatably connected between the vertical plates 2, and a motor 4 fixedly installed on the left end of the vertical plate 2 on the left side, wherein the output end of the motor 4 is connected to the hoisting shaft 3.

[0017] In this embodiment, the motor 4 is externally connected to a power source and a switch, so that the motor 4 drives the hoisting shaft 3 to rotate, and the hoisting shaft 3 can perform hoisting work.

[0018] The right end of the winch shaft 3 passes through the right side vertical plate 2 and is fixed with a driving gear 19. A hood 5 is fixed on the right end of the right side vertical plate 2 and located outside the driving gear 19. A rotary encoder 18 is fixedly installed inside the hood 5. The input shaft at the left end of the rotary encoder 18 is fixed to the driving gear 19. A shaft rod 8 is connected to the bearing at the right end of the right side vertical plate 2 and located below the driving gear 19. A driven gear 9 is fixed to the outside of the shaft rod 8. The driven gear 9 is meshed and connected with the driving gear 19. A brake pad 10 is embedded and fixed on the outside of the right end of the driven gear 9. A slide seat 11 is fixed on the lower side of the right end of the right side vertical plate 2. A controller 12 connected to the rotary encoder 18 is installed at the rear end of the slide seat 11. A brake mechanism connected to the controller 12 is provided on the slide seat 11.

[0019] In this embodiment, when the winch shaft 3 rotates, it can drive the driving gear 19 to rotate, and the driving gear 19 will drive the input shaft of the rotary encoder 18 to rotate, so that the rotary encoder 18 can detect the number of rotations of the driving gear 19 and the winch shaft 3, and then transmit a signal to the controller 12, and then the controller 12 will control the brake mechanism to cooperate with the brake pad 10.

[0020] The brake mechanism includes an electric push rod 15, a movable frame 16 and a brake seat 17. The movable frame 16 is slidably connected to the upper end of the slide 11, and the brake seat 17 is fixed to the upper end of the movable frame 16. The brake seat 17 is in contact with the brake pad 10. The electric push rod 15 is installed at the right end of the slide 11, and the power end of the electric push rod 15 is connected to the movable frame 16.

[0021] In this embodiment, the controller 12 controls the electric push rod 15 to push the moving frame 16, so that the moving frame 16 drives the brake seat 17 to approach the brake pad 10 of the driven gear 9, so that the friction between the brake pad 10 and the brake seat 17 can play a damping role on the driven gear 9, so that the driving gear 19 can be damped, and then the winch shaft 3 can be damped.

[0022] The upper end of the slide seat 11 is provided with a slideway 13 , and a slider 14 is slidably connected inside the slideway 13 . The slider 14 is fixed to the lower end of the moving frame 16 . The power end of the electric push rod 15 passes through the slideway 13 and is connected to the slider 14 .

[0023] In this embodiment, the electric push rod 15 can push the slider 14 to slide to the left in the slideway 13, so that the slider 14 will drive the moving frame 16 to move to the left.

[0024] The rotary encoder 18 is connected to the controller 12 via signals, and the controller 12 is connected to the electric push rod 15 via signals.

[0025] In this embodiment, the rotary encoder 18 is used to detect the number of rotations of the driving gear 19, thereby detecting the number of rotations of the winch shaft 3. When the hoisted object is lowered by rotating the winch shaft 3 multiple times, as the number of rotations of the winch shaft 3 reaches the threshold set in the controller 12, the controller 12 can control the electric push rod 15 to push the slider 14 to move left.

[0026] An outflow pipe 6 is fixed to the upper end of the hood 5 , an oil storage hopper 7 connected thereto is fixed to the upper end of the outflow pipe 6 , an oil dripping port 20 is opened at the upper end of the hood 5 and below the outflow pipe 6 , and the outflow pipe 6 is connected to the oil dripping port 20 .

[0027] In this embodiment, by pouring the lubricating oil into the oil storage hopper 7 , the lubricating oil can fall onto the driving gear 19 along the outflow pipe 6 and the oil dripping port 20 , thereby facilitating the lubricating oil application to the driving gear 19 .

[0028] The bottom opening diameter of the oil drip port 20 is smaller than the top opening diameter of the oil drip port 20 , and a sealing bead 21 is arranged inside the oil drip port 20 . The diameter of the sealing bead 21 is larger than the bottom opening diameter of the oil drip port 20 , and the diameter of the sealing bead 21 is smaller than the inner diameter of the oil drip port 20 .

[0029] In this embodiment, the bottom of the oil drip port 20 is usually blocked by the blocking bead 21. When the driving gear 19 rotates until the teeth contact the lower part of the blocking bead 21, the blocking bead 21 can be pushed upward and no longer blocks the bottom opening of the oil drip port 20. In this way, the lubricating oil can fall from the oil drip port 20 onto the driving gear 19, thereby ensuring uniform oiling.

[0030] Working principle: Because the controller 12 pre-sets a threshold value for how many turns the rotary encoder 18 reverses, when the motor 4 drives the winch shaft 3 to reverse, the winch shaft 3 can unwind the wire rope, so that the winch shaft 3 can drive the driving gear 19 to reverse, and at the same time the driving gear 19 meshes with the driven gear 9 to rotate the driven gear 9, and the driving gear 19 will drive the input shaft of the rotary encoder 18 to reverse, so that the rotary encoder 18 can detect the number of reverse turns of the driving gear 19 and the winch shaft 3, and then transmit a signal to the controller 12. When the number of reverse turns of the rotary encoder 18 is When the threshold in the controller 12 is reached, the controller 12 will control the electric push rod 15 to push the slider 14 to slide to the left in the slide 13, so that the slider 14 will drive the moving frame 16 to move to the left, so that the moving frame 16 drives the brake seat 17 to approach the brake pad 10 of the driven gear 9, so that the brake pad 10 and the brake seat 17 rub against each other, and the driven gear 9 is damped, so that the driving gear 19 can be damped, and then the winch shaft 3 can be damped, so that when unloading the goods, the goods can be buffered and decelerated to avoid damage to the winch due to excessive impact.

[0031] The rotary encoder 18, the controller 12 and the electric push rod 15 are all connected to an external power source.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hoisting device for a crane, comprising a mounting frame (1), upright plates (2) fixed on the left and right sides of the upper end thereof, a hoisting shaft (3) rotatably connected between the upright plates (2), and a motor (4) fixedly mounted on the left end of the upright plate (2) on the left side, wherein the output end of the motor (4) is connected to the hoisting shaft (3), and characterized in that: The right end of the hoisting shaft (3) passes through the right side vertical plate (2) and is fixed with a driving gear (19); a hood (5) is fixed at the right end of the right side vertical plate (2) and outside the driving gear (19); a rotary encoder (18) is fixedly installed inside the hood (5); an input shaft at the left end of the rotary encoder (18) is fixed to the driving gear (19); a shaft (8) is connected to the bearing at the right end of the right side vertical plate (2) and below the driving gear (19); a driven gear (9) is fixed outside the shaft (8); the driven gear (9) is meshed and connected with the driving gear (19); a brake pad (10) is embedded and fixed on the outside of the right end of the driven gear (9); a slide seat (11) is fixed on the lower side of the right end of the right side vertical plate (2); a controller (12) connected to the rotary encoder (18) is installed at the rear end of the slide seat (11); a brake mechanism connected to the controller (12) is provided on the slide seat (11).

2. A hoisting device for a crane according to claim 1, characterized in that: The brake mechanism comprises an electric push rod (15), a movable frame (16) and a brake seat (17); the movable frame (16) is slidably connected to the upper end of the slide seat (11); the brake seat (17) is fixed to the upper end of the movable frame (16); the brake seat (17) is in contact with the brake pad (10); the electric push rod (15) is installed at the right end of the slide seat (11); and the power end of the electric push rod (15) is connected to the movable frame (16).

3. A hoisting device for a crane according to claim 2, characterized in that: The upper end of the slide seat (11) is provided with a slideway (13), the interior of the slideway (13) is slidably connected with a slider (14), the slider (14) is fixed to the lower end of the moving frame (16), and the power end of the electric push rod (15) passes through the slideway (13) and is connected to the slider (14).

4. A hoisting device for a crane according to claim 3, characterized in that: The rotary encoder (18) is connected to the controller (12) by signal, and the controller (12) is connected to the electric push rod (15) by signal.

5. The hoisting device of a crane according to claim 1, characterized in that: An outflow pipe (6) is fixed at the upper end of the hood (5), an oil storage hopper (7) in communication with the outflow pipe (6) is fixed at the upper end of the hood (5), an oil dripping port (20) is provided at the upper end of the hood (5) and below the outflow pipe (6), and the outflow pipe (6) is in communication with the oil dripping port (20).

6. A hoisting device for a crane according to claim 5, characterized in that: The bottom opening diameter of the oil dripping port (20) is smaller than the top opening diameter of the oil dripping port (20); a blocking bead (21) is arranged inside the oil dripping port (20); the diameter of the blocking bead (21) is larger than the bottom opening diameter of the oil dripping port (20); and the diameter of the blocking bead (21) is smaller than the inner diameter of the oil dripping port (20).

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