Crane brake safety device

Abstract

The utility model relates to the technical field of cranes, and discloses a brake safety device of a crane. Comprising a cross beam, a box body and a pay-off roller, the box body is fixedly connected to the side wall of the cross beam, a fixing plate is fixedly connected to the interior of the box body, the two ends of the pay-off roller are rotationally connected to the inner wall of the fixing plate, an opening is formed in the inner wall of the box body, and a motor is fixedly connected to the position, located on the inner wall of the opening, of the box body; the end of an output shaft of the motor is fixedly connected with a first gear, and the roller wall of the pay-off roller penetrates through the fixing plate and is fixedly connected with a second gear. When the rotation of the pay-off roller is out of control, the rotating disc can rotate to stir the sliding rod and the moving plate to move through the curved guide groove in the rotating disc, the limiting teeth are pushed to extend to the inner wall, located in the insertion groove, of the safety shaft, the safety shaft is clamped and fixed, and the rotating shaft and the pay-off roller are kept stable through the bevel gear; and safety braking is timely performed when the pay-off roller is out of control in rotation.

Description

Technical Field

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

[0002] A crane is a piece of equipment used for lifting operations at construction sites or other locations. It is usually composed of a main lifting mechanism, supporting structure, operating mechanism, and control system. A crane can lift and move heavy objects through devices such as wire ropes, chains, or hydraulic cylinders. It is used to transport goods, building materials, etc. There are many types of cranes, which can be divided into tower cranes, gantry cranes, bridge cranes, crawler cranes, etc. according to their structure and function. Cranes are widely used in construction, manufacturing, shipping, ports, and other fields.

[0003] In the prior art, during the use of a crane, if the weight of the lifting object is large and causes the crane to be overloaded, the wire roller inside the crane may lose control and cause the wire body to slip, which poses a great safety hazard. When in use, the lack of a quick and stable locking safety inside the device will affect the safety of the crane. Therefore, the utility model designs a crane brake safety device. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that during the use of the crane, if the weight of the lifting object is large and causes the crane to be overloaded, it may cause the wire roller inside the crane to lose control and cause the wire body to slip, which has a great safety hazard. When in use, the lack of a quick and stable locking safety inside the device will affect the safety of the use of the crane. A crane brake safety device is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A crane brake safety device comprises a crossbeam, a box body and a pay-off roller, wherein the box body is fixedly connected to the side wall of the crossbeam, a fixing plate is fixedly connected inside the box body, two ends of the pay-off roller are rotatably connected to the inner wall of the fixing plate respectively, an opening is opened on the inner wall of the box body, a motor is fixedly connected to the inner wall of the box body located at the opening, a first gear is fixedly connected to the end of the output shaft of the motor, a roller wall of the pay-off roller passes through the fixing plate and is fixedly connected to a second gear, the first gear and the second gear are meshed with each other, an end of the pay-off roller is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to the inner wall of the box body, a safety shaft is rotatably connected to the inner wall of the box body, a fixing cylinder is sleeved on the outer side of the safety shaft, the fixing cylinder is fixedly connected to the inner wall of the box body, a limiting mechanism is provided inside the fixing cylinder.

[0007] Preferably, bevel gears are fixedly sleeved on the shaft walls of the rotating shaft and the safety shaft respectively, and the two bevel gears are meshed with each other.

[0008] Preferably, the limiting mechanism includes a turntable, a movable plate, a sliding rod and a limiting tooth. The turntable is rotatably connected to the inner wall of the fixed cylinder, a plurality of curved guide grooves are opened around the inner wall of the turntable, the sliding rod is slidably arranged on the inner wall of the turntable located in the curved guide groove, the movable plate is fixedly connected to the rod wall of the sliding rod, the limiting tooth is fixedly connected to the inner wall of the movable plate, a plurality of slots are opened around the shaft body of the safety shaft, and the limiting tooth extends to the inner wall of the slot.

[0009] Preferably, the end of the limiting tooth away from the movable plate is set in a semicircular shape, and the safety shaft is located on the inner wall of the slot and matches the limiting tooth.

[0010] Preferably, an opening is provided on the wall of the fixed cylinder, a cylinder is fixedly connected to the wall of the fixed cylinder, a transmission rod is fixedly connected to the side wall of the turntable, the rod wall of the transmission rod is slidably arranged on the inner wall of the fixed cylinder located at the opening, a strip-shaped opening is provided on the inner wall of the transmission rod, a shift rod is slidably arranged on the inner wall of the strip opening, and the end of the shift rod is fixedly connected to the piston rod of the cylinder.

[0011] Preferably, an annular groove is formed on the inner wall of the fixing cylinder, and a plurality of stabilizing blocks are fixedly connected to the side wall of the annular groove of the rotating disk, and the plurality of stabilizing blocks are respectively slidably arranged on the inner wall of the fixing cylinder located in the annular groove.

[0012] Compared with the prior art, the utility model provides a crane brake safety device, which has the following beneficial effects:

[0013] 1. The crane brake safety device, when the pay-off roller rotates out of control, the turntable will rotate through the internal curved guide groove to move the slide bar and the moving plate, push the limit teeth to extend to the inner wall of the safety shaft located in the slot, so that the safety shaft is stuck and fixed, and the bevel gear is used to keep the rotating shaft and the pay-off roller in a stable setting, so that the safety brake is applied in time when the pay-off roller rotates out of control.

[0014] 2. The brake safety device of the crane can drive the lever to slide along the inner wall of the strip-shaped opening of the transmission rod through the movement of the piston rod of the cylinder, so as to push the transmission rod to move and drive the turntable to rotate, so that the turntable can be set to rotate stably, and the stabilizing block slides along the inner wall of the annular groove to further improve the stability of the turntable's rotation inside the fixed cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a crane brake safety device proposed by the utility model;

[0016] Figure 2 for Figure 1 A top view of the structure of the middle fixed cylinder;

[0017] Figure 3 for Figure 2 Structural side view of the moving plate.

[0018] In the figure: 1 beam, 2 box, 3 pay-off roller, 4 fixed plate, 5 motor, 6 first gear, 7 second gear, 8 rotating shaft, 9 safety shaft, 10 bevel gear, 11 fixed cylinder, 12 turntable, 13 moving plate, 14 slide rod, 15 limit gear, 16 cylinder, 17 transmission rod, 18 lever, 19 stabilizing block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Embodiment 1

[0021] Reference Figure 1-3 A crane brake safety device comprises a crossbeam 1, a box body 2 and a pay-off roller 3. The box body 2 is fixedly connected to the side wall of the crossbeam 1, a fixing plate 4 is fixedly connected inside the box body 2, two ends of the pay-off roller 3 are rotatably connected to the inner wall of the fixing plate 4 respectively, an opening is opened in the inner wall of the box body 2, a motor 5 is fixedly connected to the inner wall of the box body 2 located at the opening, a first gear 6 is fixedly connected to the end of the output shaft of the motor 5, the roller wall of the pay-off roller 3 passes through the fixing plate 4 and is fixedly connected to the second gear 7, the first gear 6 and the second gear 7 are meshed with each other, a rotating shaft 8 is fixedly connected to the end of the pay-off roller 3, the rotating shaft 8 is rotatably connected to the inner wall of the box body 2, a safety shaft 9 is rotatably connected to the inner wall of the box body 2, a fixing cylinder 11 is sleeved on the outer side of the safety shaft 9, and the fixing cylinder 11 is fixedly connected to the inner wall of the box body 2, a bevel gear 10 is fixedly sleeved on the shaft wall of the rotating shaft 8 and the safety shaft 9 respectively, and the two bevel gears 10 are meshed with each other.

[0022] A limiting mechanism is provided inside the fixed cylinder 11, and the limiting mechanism includes a turntable 12, a movable plate 13, a sliding rod 14 and a limiting tooth 15. The turntable 12 is rotatably connected to the inner wall of the fixed cylinder 11, and a plurality of curved guide grooves are opened around the inner wall of the turntable 12. The sliding rod 14 is slidably arranged on the inner wall of the turntable 12 located in the curved guide groove. The movable plate 13 is fixedly connected to the rod wall of the sliding rod 14, and the limiting tooth 15 is fixedly connected to the inner wall of the movable plate 13. A plurality of slots are opened around the shaft body of the safety shaft 9, and the limiting tooth 15 extends to the inner wall of the slot. The end of the limiting tooth 15 away from the movable plate 13 is set to be semicircular, and the inner wall of the safety shaft 9 located in the slot matches the limiting tooth 15.

[0023] When in use, the rotation of the output shaft of the motor 5 can drive the first gear 6, the second gear 7 and the pay-off roller 3 to rotate. The first gear 6 is smaller than the second gear 7, and can be reduced in transmission when the first gear 6 drives the second gear 7 to transmit, so that the motor 5 can drive the pay-off roller 3 to rotate more stably, and the crossbeam 1 can make the box body 2 stably placed. When the pay-off roller 3 rotates, it will drive the rotating shaft 8 to rotate. The rotating shaft 8 can drive the safety shaft 9 to rotate through the bevel gear 10. When the pay-off roller 3 rotates out of control, the turntable 12 will rotate through the internal curved guide groove to move the sliding rod 14 and the moving plate 13, and can push the limiting tooth 15 to extend to the inner wall of the safety shaft 9 located in the slot, so that the safety shaft 9 can be stuck and fixed, and the rotating shaft 8 and the pay-off roller 3 can be kept stably set through the bevel gear 10, and the safety brake can be timely when the pay-off roller 3 rotates out of control.

[0024] Embodiment 2

[0025] Reference Figure 1-3 An opening is provided on the wall of the fixed cylinder 11, a cylinder 16 is fixedly connected to the wall of the fixed cylinder 11, a transmission rod 17 is fixedly connected to the side wall of the turntable 12, the rod wall of the transmission rod 17 is slidably arranged on the inner wall of the fixed cylinder 11 located at the opening, a strip-shaped opening is provided on the inner wall of the transmission rod 17, a lever 18 is slidably arranged on the inner wall of the strip-shaped opening, and the end of the lever 18 is fixedly connected to the piston rod of the cylinder 16, an annular groove is provided on the inner wall of the fixed cylinder 11, and a plurality of stabilizing blocks 19 are fixedly connected to the side wall of the turntable 12 located at the annular groove, and the plurality of stabilizing blocks 19 are respectively slidably arranged on the inner wall of the fixed cylinder 11 located at the annular groove.

[0026] The movement of the piston rod of the cylinder 16 can drive the lever 18 to slide along the inner wall of the strip-shaped opening of the transmission rod 17, which can push the transmission rod 17 to move and drive the turntable 12 to rotate, so that the turntable 12 can be set to rotate stably. The stabilizing block 19 slides along the inner wall of the annular groove to further improve the stability of the rotation of the turntable 12 inside the fixed cylinder 11.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A crane brake safety device, comprising a crossbeam (1), a box (2) and a pay-off roller (3), characterized in that: The box body (2) is fixedly connected to the side wall of the crossbeam (1); a fixing plate (4) is fixedly connected inside the box body (2); two ends of the pay-off roller (3) are rotatably connected to the inner wall of the fixing plate (4); an opening is provided on the inner wall of the box body (2); a motor (5) is fixedly connected to the inner wall of the box body (2) located at the opening; a first gear (6) is fixedly connected to the end of the output shaft of the motor (5); a roller wall of the pay-off roller (3) passes through the fixing plate (4) and is fixedly connected to the fixing plate (4). A second gear (7) is connected, the first gear (6) and the second gear (7) are meshed with each other, the end of the pay-off roller (3) is fixedly connected to a rotating shaft (8), the rotating shaft (8) is rotatably connected to the inner wall of the box body (2), the inner wall of the box body (2) is rotatably connected to a safety shaft (9), the outer side of the safety shaft (9) is sleeved with a fixed cylinder (11), the fixed cylinder (11) is fixedly connected to the inner wall of the box body (2), and a limiting mechanism is provided inside the fixed cylinder (11).

2. A crane brake safety device according to claim 1, characterized in that: Bevel gears (10) are fixedly sleeved on the shaft walls of the rotating shaft (8) and the safety shaft (9), respectively, and the two bevel gears (10) are meshed with each other.

3. A crane brake safety device according to claim 1, characterized in that: The limiting mechanism comprises a rotating disk (12), a movable plate (13), a sliding rod (14) and a limiting tooth (15); the rotating disk (12) is rotatably connected to the inner wall of the fixed cylinder (11); a plurality of curved guide grooves are arranged around the inner wall of the rotating disk (12); the sliding rod (14) is slidably arranged on the inner wall of the rotating disk (12) located in the curved guide groove; the movable plate (13) is fixedly connected to the rod wall of the sliding rod (14); the limiting tooth (15) is fixedly connected to the inner wall of the movable plate (13); a plurality of slots are arranged around the shaft body of the safety shaft (9); and the limiting tooth (15) extends to the inner wall of the slot.

4. A crane brake safety device according to claim 3, characterized in that: The end of the limiting tooth (15) facing away from the movable plate (13) is arranged in a semicircular shape, and the safety shaft (9) is located on the inner wall of the slot and matches the limiting tooth (15).

5. A crane brake safety device according to claim 3, characterized in that: The fixed cylinder (11) has an opening on its wall, a cylinder (16) is fixedly connected to the wall of the fixed cylinder (11), a transmission rod (17) is fixedly connected to the side wall of the rotating disk (12), a rod wall of the transmission rod (17) is slidably arranged on the inner wall of the fixed cylinder (11) at the opening, a strip opening is formed on the inner wall of the transmission rod (17), a shifting rod (18) is slidably arranged on the inner wall of the strip opening, and an end of the shifting rod (18) is fixedly connected to the piston rod of the cylinder (16).

6. A crane brake safety device according to claim 3, characterized in that: An annular groove is formed on the inner wall of the fixed cylinder (11); the rotating disk (12) is fixedly connected to a plurality of stabilizing blocks (19) on the side wall of the annular groove; the plurality of stabilizing blocks (19) are respectively slidably arranged on the inner wall of the fixed cylinder (11) located on the annular groove.

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