Portal crane capable of emergency braking

Abstract

The utility model relates to a portal crane capable of braking emergently, which comprises a crane cross beam, a U-shaped frame is arranged at the bottom of the crane cross beam, a driving walking structure is arranged between the U-shaped frame and the crane cross beam, and an electric hoist is fixedly mounted at the bottom of the U-shaped frame. And an emergency braking structure arranged at the top of the crane cross beam in a sleeving manner is arranged outside the U-shaped frame. According to the portal crane capable of achieving emergency braking, the electric hoist is connected to the bottom of the crane cross beam through the U-shaped frame to move, the clamping plates are limited to slide in the rectangular holes through the limiting cross rods, and the clamping plates and the carbon ceramic brake pads are controlled to be close to or away from each other through the connecting rods; the carbon ceramic brake pad and the cast iron plate are attached and rubbed, the braking structure on the top of the crane cross beam drives the U-shaped frame and the electric hoist to brake, the braking loss rate is small through the braking mode, and compared with the prior art, the brake is more durable.

Description

TECHNICAL FIELD

[0001] The utility model relates to door type crane technical field, concretely is a door type crane of emergency brake. BACKGROUND

[0002] Door type crane as a kind of heavy machinery equipment, is widely used in various industrial fields, such as construction engineering, metallurgy, port, shipbuilding, logistics and energy industries, its main function is under the control of operating personnel, specified goods are moved in horizontal and vertical direction, so that goods can accurately reach specified position, this crane has high reliability, lifting weight is big, clearance is low, wheel pressure is small, running is stable, positioning is fast and operation is simple and so on, greatly improve production efficiency and logistics efficiency.

[0003] The Chinese utility model patent with disclosure number CN217230010U proposes "a European door type crane with emergency braking structure", which proposes the problem that "most existing devices cannot brake the device in an emergency during device movement, the device may collide during use, and the impact force cannot be buffered during braking, thereby reducing the braking effect of the device". To solve this problem, the utility model provides the following technical solution: "a brake assembly is provided, which can brake the device in an emergency during device movement, prevent the device from colliding during use, and buffer the impact force during braking, thereby improving the braking effect of the device".

[0004] But the above-mentioned device has the following defects in actual use: during work, the clamping block needs to be pushed into the clamping groove by the electric push rod to complete braking, if braking suddenly, the clamping block is easily broken by inertia, or the convex part between the two adjacent grooves is damaged, which is not durable, therefore, a door type crane with emergency braking is proposed to solve the above problems. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides a door type crane with emergency braking to overcome the deficiencies in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A door type crane with emergency braking, comprising a crane beam, the bottom of the crane beam is provided with a U-shaped frame, a driving walking structure is arranged between the U-shaped frame and the crane beam, an electric hoist is fixedly installed at the bottom of the U-shaped frame, and an emergency braking structure is arranged outside the U-shaped frame and sleeved on the top of the crane beam.

[0008] The emergency braking structure comprises two connecting side plates fixedly installed on the left and right sides of the U-shaped frame, a horizontal plate fixedly installed on the top of the two connecting side plates, two rectangular holes formed in the top of the horizontal plate, a support top frame fixedly installed on the top of the horizontal plate and located outside the two rectangular holes, two limiting horizontal rods fixedly installed in the support top frame, two clamping plates slidably installed on the two limiting horizontal rods and penetrating through the bottom of the horizontal plate, two carbon ceramic brake pads fixedly installed on the opposite sides of the two clamping plates and located on the bottom of the horizontal plate, two cast iron plates fixedly installed on the left and right sides of the crane beam and corresponding to the two carbon ceramic brake pads respectively, a motor fixedly installed on the top of the support top frame, a transmission shaft fixedly installed on the output end of the motor and rotatably installed on the top of the horizontal plate, a rotating plate fixedly installed on the outer side of the transmission shaft, and two connecting rods rotatably installed on the bottom of the rotating plate and close to the left and right sides of the rotating plate.

[0009] The utility model discloses the beneficial effects are: through the U-shaped frame with electric hoist connection in crane beam bottom movement, utilize the limiting horizontal rod and limit the clamping plate in rectangular hole sliding, through the connecting rod control clamping plate and carbon ceramic brake pad close or far, when emergency braking, motor drive transmission shaft and rotating plate positive rotation make carbon ceramic brake pad and cast iron plate stick together and rub, realize crane beam top braking structure drive U-shaped frame and electric hoist stop, and this kind of braking mode stop loss rate is small, compared with traditional technology is more durable.

[0010] On the basis of the above technical scheme, the utility model still can make improvement as follows.

[0011] Further, the driving walking structure comprises two racks fixedly installed on the bottom of the crane beam, a walking motor fixedly installed on the left side of the U-shaped frame, a gear set fixedly installed on the output end of the walking motor and engaged with the bottom of the two racks, and four support rollers fixedly installed on the inner side of the U-shaped frame.

[0012] Further, the motor is adapted with a corresponding controller, the controller is installed on the bottom of the crane beam, and is in communication connection with the emergency stop button installed on the control console of the portal crane.

[0013] Further, the gear set comprises an output shaft fixedly installed on the output end of the walking motor, the output shaft is rotatably installed in the U-shaped frame, and gears engaged with the bottom of the two racks are fixedly installed on the outer side of the output shaft.

[0014] Further, the two cast iron plates are located below the two rectangular holes respectively. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the gantry crane with emergency braking capability of this utility model.

[0016] Figure 2 This is a schematic diagram of the explosion structure of the gantry crane with emergency braking according to this utility model.

[0017] Figure 3 This is a partial cross-sectional structural diagram of the emergency braking structure of this utility model;

[0018] Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle.

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Crane beam; 2. U-shaped frame; 3. Electric hoist; 4. Connecting side plate; 5. Horizontal plate; 6. Rectangular hole; 7. Support top frame; 8. Limiting crossbar; 9. Clamping plate; 10. Carbon ceramic brake pad; 11. Cast iron plate; 12. Motor; 13. Drive shaft; 14. Rotating plate; 15. Connecting rod; 16. Rack; 17. Travel motor; 18. Gear set; 19. Support roller. Detailed Implementation

[0021] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0022] Example 1, such as Figures 1-4 As shown, a gantry crane with emergency braking capability includes a crane beam 1, a U-shaped frame 2 is provided at the bottom of the crane beam 1, a drive and travel structure is provided between the U-shaped frame 2 and the crane beam 1, an electric hoist 3 is fixedly installed at the bottom of the U-shaped frame 2, and an emergency braking structure is provided on the outside of the U-shaped frame 2 and sleeved on the top of the crane beam 1.

[0023] Specifically, the emergency braking structure includes connecting side plates 4 fixedly installed on the left and right sides of the U-shaped frame 2. A horizontal plate 5 is fixedly installed on the top of the two connecting side plates 4. Two rectangular holes 6 are opened on the top of the horizontal plate 5. A supporting top frame 7 located outside the two rectangular holes 6 is fixedly installed on the top of the horizontal plate 5. Two limiting crossbars 8 are fixedly installed inside the supporting top frame 7. Two clamping plates 9 are slidably installed outside the two limiting crossbars 8, extending to the bottom of the horizontal plate 5. The two clamping plates 9 are slidably installed inside the two rectangular holes 6 respectively. The two clamping plates 9 are... Carbon ceramic brake pads 10 are fixedly installed on both sides at the bottom of the horizontal plate 5. Cast iron plates 11 corresponding to the two carbon ceramic brake pads 10 are fixedly installed on both the left and right sides of the crane beam 1. A motor 12 is fixedly installed on the top of the support frame 7. A drive shaft 13 is fixedly installed at the output end of the motor 12. The drive shaft 13 is rotatably installed on the top of the horizontal plate 5. A rotating plate 14 is fixedly installed on the outside of the drive shaft 13. Connecting rods 15 close to its left and right sides are rotatably installed on the bottom of the rotating plate 14. The two connecting rods 15 are also rotatably installed on the top of the two clamping plates 9 respectively.

[0024] In use, the electric hoist 3 is connected to the bottom of the crane beam 1 via the U-shaped frame 2. When the emergency braking structure stops, the U-shaped frame 2 and the electric hoist 3 can stop moving together. The two clamping plates 9 are restricted to slide inside the two rectangular holes 6 by the two limit crossbars 8. By controlling the motor 12 to drive the transmission shaft 13 and the rotating plate 14 to rotate forward, the two clamping plates 9 and the carbon ceramic brake pads 10 can be pulled closer to each other by the two connecting rods 15. By controlling the motor 12 to drive the transmission shaft 13 and the rotating plate 14 to rotate in the opposite direction, the two clamping plates 9 and the carbon ceramic brake pads 10 can be pushed further apart by the two connecting rods 15. In case of emergency braking, the motor 12 can be controlled to drive the transmission shaft 13 and the rotating plate 14 to rotate in the forward direction, causing the two carbon ceramic brake pads 10 to approach each other. When the two carbon ceramic brake pads 10 approach each other, they will rub against the two cast iron plates 11 respectively. At this time, the emergency braking structure at the top of the crane beam 1 can drive the U-shaped frame 2 and the electric hoist 3 to stop. When stopping, the wear rate is small, and compared with the existing technology, it achieves a durable effect. By controlling the motor 12 to drive the transmission shaft 13 and the rotating plate 14 to rotate in the reverse direction, the two carbon ceramic brake pads 10 will move away from each other, and the braking on the U-shaped frame 2 and the electric hoist 3 can be released.

[0025] Example 2, as Figures 1-2 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0026] The driving structure includes two racks 16 fixedly installed at the bottom of the crane beam 1. A travel motor 17 is fixedly installed on the left side of the U-shaped frame 2. A gear set 18 meshing with the bottom of the two racks 16 is fixedly installed at the output end of the travel motor 17. Four support rollers 19 are fixedly installed on the inner side of the U-shaped frame 2. The four support rollers 19 are paired up and rolled on the left and right inner bottom walls of the crane beam 1.

[0027] With this configuration, the U-shaped frame 2 is supported and restricted to slide stably at the bottom of the crane beam 1 by four support rollers 19. The traveling motor 17 drives the gear set 18 to rotate forward and backward at the bottom of the two racks 16, which allows the U-shaped frame 2 and the electric hoist 3 to move back and forth on the crane beam 1.

[0028] Example 3, as Figures 1-4 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0029] The motor 12 is equipped with a corresponding controller, which is installed at the bottom of the crane beam 1 and communicates with the emergency stop button installed on the control console of the gantry crane.

[0030] With this setup, in the event of an emergency, the operator in the control room will quickly press the emergency stop button on the gantry crane control panel. This emergency stop button will send an emergency stop signal to the controller installed at the bottom of the crane beam 1, which is compatible with the motor 12. After receiving the signal, the controller will immediately send a working command to the motor 12, causing the gantry crane to stop running quickly.

[0031] Example 4, as Figures 1-2 As shown, this embodiment is a further improvement based on embodiment 2, and its specific details are as follows:

[0032] The gear set 18 includes an output shaft fixedly mounted on the output end of the walking motor 17, the output shaft being rotatably mounted inside the U-shaped frame 2, and gears meshing with the bottom of two racks 16 being fixedly mounted on the outside of the output shaft.

[0033] With this setup, the output shaft is driven to rotate via gear set 18, and then the output shaft drives two gears to rotate.

[0034] Example 5, as Figures 1-4 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0035] Two cast iron plates 11 are located below the two rectangular holes 6 respectively.

[0036] In this way, the purpose is that when the two carbon ceramic brake pads 10 are driven to approach by the clamping plate 9 sliding in the two rectangular holes 6, the two cast iron plates 11 can be precisely attached and rubbed.

[0037] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. An emergency brakeable gantry crane comprising a crane beam (1), characterized in that: The bottom of the crane beam (1) is provided with a U-shaped frame (2), a driving walking structure is arranged between the U-shaped frame (2) and the crane beam (1), the bottom of the U-shaped frame (2) is fixedly provided with an electric hoist (3), and the outer portion of the U-shaped frame (2) is provided with an emergency brake structure sleeved on the top of the crane beam (1). The emergency brake structure comprises two connecting side plates (4) fixedly installed on the left and right sides of the U-shaped frame (2), the top of each connecting side plate (4) is fixedly provided with a horizontal plate (5), the top of the horizontal plate (5) is provided with two rectangular holes (6), the top of the horizontal plate (5) is fixedly provided with a supporting top frame (7) located outside the two rectangular holes (6), the inside of the supporting top frame (7) is fixedly provided with two limiting horizontal rods (8), the outside of each limiting horizontal rod (8) is slidably provided with a clamping plate (9) penetrating through the bottom of the horizontal plate (5), each clamping plate (9) is slidably arranged in the inside of each rectangular hole (6), and the opposite sides of each clamping plate (9) are fixedly provided with a carbon ceramic brake pad (10) located on the bottom of the horizontal plate (5). The left and right sides of the crane beam (1) are fixedly provided with two cast iron plates (11) corresponding to the two carbon ceramic brake pads (10) respectively, the top of the supporting top frame (7) is fixedly provided with a motor (12), the output end of the motor (12) is fixedly provided with a transmission shaft (13), the transmission shaft (13) is rotatably arranged on the top of the horizontal plate (5), the outside of the transmission shaft (13) is fixedly provided with a rotating plate (14), the bottom of the rotating plate (14) is rotatably provided with a connecting rod (15) close to the left and right sides thereof, and the two connecting rods (15) are also rotatably arranged on the top of the two clamping plates (9) respectively.

2. A door crane with emergency braking according to claim 1, characterized in that: The driving walking structure comprises two racks (16) fixedly arranged on the bottom of the crane beam (1), the left side of the U-shaped frame (2) is fixedly provided with a walking motor (17), the output end of the walking motor (17) is fixedly provided with a gear set (18) engaged with the bottom of each rack (16), and the inner side of the U-shaped frame (2) is fixedly provided with four supporting rollers (19), and each group of the four supporting rollers (19) is rotatably supported on the left and right inner side bottom walls of the crane beam (1).

3. A door crane with emergency braking according to claim 1, characterized in that: The motor (12) is provided with a corresponding controller, the controller is arranged on the bottom of the crane beam (1) and is in communication connection with an emergency stop button arranged on a control console of the portal crane.

4. A door crane with emergency braking according to claim 2, characterised in that: The gear set (18) comprises an output shaft fixedly arranged on the output end of the walking motor (17), the output shaft is rotatably arranged in the inside of the U-shaped frame (2), and the outside of the output shaft is fixedly provided with gears engaged with the bottom of each rack (16).

5. A door crane with emergency braking according to claim 1, characterized in that: The two cast iron plates (11) are located below the two rectangular holes (6) respectively.

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