Novel braking anti-falling device
By introducing a dual braking mechanism into the mine hoist, the limitations of the single protection mechanism of the existing fall arrester are solved, a double insurance anti-fall effect is achieved in complex environments, and the risk of the cage falling is reduced.
Patent Information
- Application Number
- CN202511095035.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-06
- Publication Date
- 2025-09-23
AI Technical Summary
The existing mine hoist's fall arrester only has a single protection mechanism, which is prone to failure due to mechanical failure, wear and tear, or external interference in the complex and changeable mine environment. The lack of redundant protection leads to a high risk of cage falling accidents that are difficult to prevent.
A new type of braking anti-fall device is designed, which includes the first and second braking mechanisms, which respectively clamp and brake the brake rope through the brake wheel and brake rod, providing double insurance to ensure timely braking in the event of cage overspeed or failure.
It effectively reduces the risk of cage falling accidents and provides timely anti-fall protection in the event of a fault through the dual braking mechanism, thereby improving safety and reliability.
Smart Images
Figure CN120681630A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of fall arresters, in particular to a novel braking fall arrester. Background Art
[0002] Mine hoists consist of two types of hoisting equipment: a skip and a cage. The skip primarily transports materials like coal and gangue, while the cage primarily transports equipment and personnel. Workers are transported up and down the mine using the cage. If the active wire rope breaks, the cage's wedge-shaped arrester securely grips the brake rope to prevent the cage from falling.
[0003] Existing fall arresters only have a single protection mechanism. This single protection method has significant limitations when facing the complex and changing working environment of mines and various unforeseen emergencies. If this single protection fails due to mechanical failure, wear and tear, design flaws, or external interference, the cage will lose all its protection, making a fall accident inevitable. Moreover, due to the lack of redundant protection, potential fall arrester issues are often difficult to detect before an accident occurs, making it impossible to take effective preventive measures in a timely manner, further increasing the risk of accidents. Therefore, a new braking fall arrester is proposed. Summary of the Invention
[0004] The purpose of the present invention is to solve the problems in the prior art and to propose a new type of braking and anti-falling device.
[0005] A novel braking and anti-falling device includes an I-shaped mounting bracket, a pair of first braking mechanisms and a pair of second braking mechanisms are respectively mounted on the mounting bracket for clamping and braking a brake rope, and a rope threading hole is opened on the mounting bracket for threading the brake rope;
[0006] Each of the first braking mechanisms includes a brake box, which is installed on a mounting bracket. The top of the brake box is open, and the front and rear side walls of the brake box are rotatably connected to two symmetrical rotating shafts. The two rotating shafts are coaxially connected to brake wheels, and each brake wheel is provided with a brake tooth. The two rotating shafts are coaxially connected to connecting gears, and the two connecting gears are engaged with each other.
[0007] Preferably, the inner wall of the brake box is connected to a control box, a limit block is provided in the control box, and the control box can control the sliding of the limit block. A connecting arm is connected to one of the brake wheels, and the end of the connecting arm away from the rotating shaft is connected to a spring, and the end of the spring away from the connecting arm is connected to the inner wall of the brake box, and a limit groove is provided on the connecting arm corresponding to the limit block.
[0008] Preferably, an electric push rod is installed on the inner wall of the brake box close to the spring, and the movable end of the electric push rod is connected to a push wheel.
[0009] Preferably, each of the second braking mechanisms includes a C-shaped fixed frame, the top of the fixed frame is connected to a fixed ring, the top and bottom surfaces of the fixed ring are rotatably connected to a rotating ring, multiple pairs of connecting ears are connected to the two rotating rings, each pair of connecting ears is connected by a connecting pin, a motor is installed on the fixed frame, the output shaft of the motor passes through the fixed frame and is coaxially connected to a transmission gear, the outer ring surface of the rotating ring located above is connected to an arc-shaped rack, the arc-shaped rack is meshed with the transmission gear, and braking units are provided on the fixed ring and the two rotating rings to clamp and brake the brake rope.
[0010] Preferably, the braking unit includes multiple brake rods, the upper surface and lower surface of the fixed ring are each connected to six fixed seats in a circular array, the upper surface of the upper rotating ring and the lower surface of the lower rotating ring are each rotatably connected to six rotating seats in a circular array, each of the rotating seats and fixed seats is provided with three mounting holes, the six fixed seats and six rotating seats on the same side are divided into six pairs, and are respectively connected to six brake rods.
[0011] Preferably, the six pairs of fixed seats and rotating seats are divided into three groups of brake parts in pairs. In each group of brake parts, the mounting holes on a pair of fixed seats are fixedly connected to the brake rod, and the mounting holes on the rotating seats are slidably connected to the brake rod. In each group of brake parts, the mounting holes on another pair of fixed seats are slidably connected to the brake rod, and the mounting holes on the rotating seats are fixedly connected to the brake rod.
[0012] Preferably, the mounting holes for the brake rod connections in the three groups of brake components have different heights, and the mounting holes for the brake rod connections in each group have the same height.
[0013] Preferably, each of the brake rods is provided with a thread.
[0014] Compared with the existing technology, the advantages of the present invention are:
[0015] The present invention is provided with a first braking mechanism and a second braking mechanism. When the cage falls rapidly due to overspeed or failure, the brake wheel in the first braking mechanism will clamp and brake the brake rope, and at the same time, the brake rod in the second braking mechanism will clamp and brake the brake rope, which serves as a double insurance for the anti-fall braking of the cage and effectively reduces the risk of accidents. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the present invention.
[0017] Figure 2It is a structural schematic diagram from another angle of the present invention.
[0018] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.
[0019] Figure 4 It is a schematic structural diagram of the fixed ring and the rotating ring part in the present invention.
[0020] Figure 5 It is a structural schematic diagram of the second braking mechanism in the present invention.
[0021] Figure 6 This is a structural schematic diagram of the second braking mechanism in the present invention from another angle.
[0022] In the figure: 1 mounting bracket, 2 first brake mechanism, 21 brake box, 22 control box, 221 limit block, 23 rotating shaft, 24 brake wheel, 241 brake latch, 25 connecting arm, 251 limit groove, 26 connecting gear, 27 spring, 28 electric push rod, 29 push wheel, 3 second brake mechanism, 31 fixed frame, 32 fixed ring, 33 rotating ring, 331 connecting ear, 34 connecting pin, 35 motor, 351 transmission gear, 352 arc rack, 36 rotating seat, 37 fixed seat, 38 brake lever. DETAILED DESCRIPTION
[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.
[0024] Reference Figure 1-6 As shown, a novel braking and anti-falling device includes an I-shaped mounting bracket 1, on which a pair of first braking mechanisms 2 and a pair of second braking mechanisms 3 are respectively mounted for clamping and braking the brake rope. The mounting bracket 1 is provided with a rope threading hole for the brake rope to pass through.
[0025] Each of the first braking mechanisms 2 includes a brake box 21, which is installed on the mounting bracket 1. The top of the brake box 22 is open, and the front and rear side walls of the brake box 21 are rotatably connected to two symmetrical rotating shafts 23. The two rotating shafts 23 are coaxially connected to brake wheels 24, and each brake wheel 24 is provided with a brake tooth 241. The two rotating shafts 23 are coaxially connected to connecting gears 26, and the two connecting gears 26 are engaged with each other.
[0026] In this embodiment, the inner wall of the brake box 21 is connected to a control box 22, and a limit block 212 is provided in the control box 22. The control box 22 can control the sliding of the limit block 221. A connecting arm 25 is connected to one of the brake wheels 24, and the end of the connecting arm 25 away from the rotating shaft 23 is connected to a spring 27. The end of the spring 27 away from the connecting arm 25 is connected to the inner wall of the brake box 21, and a limit groove 251 is provided on the connecting arm 25 corresponding to the limit block 221.
[0027] In this embodiment, an electric push rod 28 is installed on the inner wall of the brake box 21 close to the spring 27 , and a push wheel 29 is connected to the movable end of the electric push rod 28 .
[0028] In this embodiment, each of the second braking mechanisms 3 includes a C-shaped fixed frame 31, the top of the fixed frame 31 is connected to a fixed ring 32, the top and bottom surfaces of the fixed ring 32 are rotatably connected to a rotating ring 33, and multiple pairs of connecting ears 331 are connected to the two rotating rings 33, and each pair of connecting ears 331 is connected by a connecting pin 34. A motor 35 is installed on the fixed frame 31, and the output shaft of the motor 35 passes through the fixed frame 31 and is coaxially connected to a transmission gear 351. The outer ring surface of the rotating ring 33 located above is connected to an arc-shaped rack 352, and the arc-shaped rack 352 is meshed with the transmission gear 351. Braking units are provided on the fixed ring 32 and the two rotating rings 33 to clamp and brake the brake rope.
[0029] In this embodiment, the braking unit includes multiple brake rods 38, and the upper surface and lower surface of the fixed ring 32 are each connected to six fixed seats 37 in a circular array. The upper surface of the upper rotating ring 33 and the lower surface of the lower rotating ring 33 are each rotatably connected to six rotating seats 36 in a circular array. Each of the rotating seats 36 and the fixed seat 37 is provided with three mounting holes. The six fixed seats 37 and the six rotating seats 36 on the same side (upper side or lower side) are divided into six pairs, and are respectively connected to the six brake rods 38.
[0030] In this embodiment, the six pairs of fixed seats 37 and rotating seats 36 are divided into three groups of brake parts, two by two. The mounting holes on a pair of fixed seats 37 in each group of brake parts are fixedly connected to the brake rod 38, and the mounting holes on the rotating seats 36 are slidably connected to the brake rod 38. The mounting holes on another pair of fixed seats 37 in each group of brake parts are slidably connected to the brake rod 38, and the mounting holes on the rotating seats 36 are fixedly connected to the brake rod 38.
[0031] In addition, the mounting holes for connecting the brake rods 38 in the three groups of brake parts have different heights, and the mounting holes for connecting the brake rods 38 in each group have the same height, so that the three groups of brake rods 28 are staggered to avoid collision between the brake rods 38 of different groups when the rotating ring 33 rotates.
[0032] Wherein, each brake rod 38 is provided with a thread, which can be used to increase friction and better achieve the braking effect of holding the brake rope.
[0033] The working process and principle of the present invention are as follows:
[0034] When in use, the brake rope passes through the first brake mechanism 1 and the second brake mechanism 2. When the cage overspeeds or fails and falls rapidly, the control box 22 and the motor 35 will receive a start-up signal; the control box 22 in the first brake mechanism 1 controls the limit block 221 to retreat and slide out of the limit slot 251. After the connecting arm 25 loses the limit of the limit block 221, the two brake wheels 24 rotate around the rotating shaft 23 under the action of the spring 27, so that the brake teeth 241 on the two brake wheels 24 turn to brake, tighten the brake rope and brake the cage stably; at the same time, the motor 35 in the second brake mechanism 2 is turned on, and the rotating ring 33 rotates a certain angle through the meshing transmission of the transmission gear 351 and the arc-shaped rack 352. The rotating seat 36 rotates with the rotating ring 33, so that the two brake rods 38 in the same group of brake parts approach each other to clamp the brake rope, adding an extra insurance to the anti-fall braking of the cage.
[0035] When the staff has completed the inspection and found no errors, they can turn on the electric push rod 28 to push the connecting wall 25, so that the brake wheel 24 rotates back to its original position and releases the grip on the brake rope. After the connecting arm 25 returns to its initial position, the control limit block 221 is controlled to move forward and extend into the limit groove 251 to fix the brake wheel 24, maintain the working state, and wait for the next round of overspeed and fault to occur.
[0036] In the second brake mechanism 2, the motor 35 can be controlled to rotate, so that the rotating ring 33 rotates, and the brake rod 38 is separated from the brake rope, so that the holding brake can be released and the next round of braking for overspeed and fault can be prepared.
[0037] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.
Claims
1. A new type of braking anti-fall device, characterized by: The invention comprises an I-shaped mounting bracket (1), a pair of first braking mechanisms (2) and a pair of second braking mechanisms (3) are respectively mounted on the mounting bracket (1) for clamping and braking the brake rope, and a rope threading hole for the brake rope to pass through is provided on the mounting bracket (1); Each of the first braking mechanisms (2) includes a brake box (21), the brake box (21) is mounted on the mounting bracket (1), the top of the brake box (22) is open, the front and rear side walls of the brake box (21) are rotatably connected to two symmetrical rotating shafts (23), the two rotating shafts (23) are coaxially connected to brake wheels (24), each of the brake wheels (24) is provided with a brake tooth (241), the two rotating shafts (23) are coaxially connected to connecting gears (26), and the two connecting gears (26) are meshed with each other.
2. A novel braking and anti-falling device according to claim 1, characterized in that: The inner wall of the brake box (21) is connected to a control box (22), a limit block (212) is arranged in the control box (22), and the control box (22) can control the sliding of the limit block (221). One of the brake wheels (24) is connected to a connecting arm (25), and one end of the connecting arm (25) away from the rotating shaft (23) is connected to a spring (27). The end of the spring (27) away from the connecting arm (25) is connected to the inner wall of the brake box (21), and a limit groove (251) is provided on the connecting arm (25) corresponding to the limit block (221).
3. A novel braking and anti-falling device according to claim 2, characterized in that: An electric push rod (28) is installed on the inner wall of the brake box (21) close to the spring (27), and the movable end of the electric push rod (28) is connected to a push wheel (29).
4. The novel braking and anti-falling device according to claim 1 is characterized in that: Each second braking mechanism (3) includes a C-shaped fixed frame (31), the top of the fixed frame (31) is connected to a fixed ring (32), the top and bottom surfaces of the fixed ring (32) are rotatably connected to a rotating ring (33), and a plurality of connecting ears (331) are connected to the two rotating rings (33), and each pair of connecting ears (331) is connected by a connecting pin (34). A motor (35) is installed on the fixed frame (31), and the output shaft of the motor (35) passes through the fixed frame (31) and is coaxially connected to a transmission gear (351). The outer ring surface of the rotating ring (33) located above is connected to an arc-shaped rack (352), and the arc-shaped rack (352) is meshed with the transmission gear (351). Braking units are provided on the fixed ring (32) and the two rotating rings (33) to clamp and brake the brake rope.
5. The novel braking and anti-falling device according to claim 4 is characterized in that: The brake unit includes a plurality of brake rods (38), the upper surface and the lower surface of the fixed ring (32) are each connected to six fixed seats (37) in a circular array, the upper surface of the upper rotating ring (33) and the lower surface of the lower rotating ring (33) are each rotatably connected to six rotating seats (36) in a circular array, each rotating seat (36) and each fixed seat (37) is provided with three mounting holes, and the six fixed seats (37) and the six rotating seats (36) on the same side are divided into six pairs, and are respectively connected to the six brake rods (38).
6. The novel braking and anti-falling device according to claim 5 is characterized in that: The six pairs of fixed seats (37) and rotating seats (36) are divided into three groups of brake parts in pairs. The mounting holes on a pair of fixed seats (37) in each group of brake parts are fixedly connected to the brake rod (38), and the mounting holes on the rotating seats (36) are slidably connected to the brake rod (38). The mounting holes on another pair of fixed seats (37) in each group of brake parts are slidably connected to the brake rod (38), and the mounting holes on the rotating seats (36) are fixedly connected to the brake rod (38).
7. The novel braking and anti-falling device according to claim 6 is characterized in that: The mounting holes connected to the brake rods (38) in the three groups of brake components have different heights, and the mounting holes connected to the brake rods (38) in each group have the same height.
8. The novel braking and anti-falling device according to claim 7 is characterized in that: Each of the brake rods (38) is provided with a thread.