Safety braking double-beam bridge crane

Abstract

The utility model discloses a safety braking double-beam bridge crane which comprises a beam frame and an emergency safety braking mechanism, the number of the beam frames is two, the bottom ends of the two beam frames are both connected with one displacement frame in a sliding mode, limiting guide rails are symmetrically arranged on the inner walls of the lower sides of the beam frames front and back, a single-chip microcomputer is arranged outside the crane, and the input end of the single-chip microcomputer is electrically connected with an external power source; the emergency safety braking mechanism comprises a roller rotating shaft, a braking roller and a braking cable, the roller rotating shaft is rotationally connected between the front inner wall and the rear inner wall of the displacement frame, the outer arc face of the roller rotating shaft is fixedly sleeved with the braking roller, and the braking cable is wound around the outer arc face of the braking roller. Wherein the safety braking double-beam bridge crane further comprises an electric hoist, the electric hoist is arranged at the bottom end of the displacement frame, the input end of the electric hoist is electrically connected with the output end of the single chip microcomputer, and the safety braking double-beam bridge crane is safer to implement and cannot be locked.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a double-girder bridge crane with safety braking. Background Technique

[0002] In modern industrial production, as an important material handling equipment, the safe operation of a crane is related to the safety of personnel's lives and property. Among them, the safety brake of the crane, as a key component to ensure that the crane can stop accurately, stably and safely, the importance of its design, manufacture and maintenance is self-evident;

[0003] A bridge crane with a double-brake structure disclosed in CN201920832989.0 includes a bracket. A drum is arranged inside the bracket. A second servo motor is fixedly connected to the outer side wall of the bracket. The end of the output shaft of the second servo motor is fixedly connected to a rotating rod. One end of the rotating rod away from the second servo motor sequentially penetrates through the bracket and the drum and is rotatably connected to the inner side wall of the bracket. The rotating rod is rotatably connected to the bracket. Connecting blocks are fixedly connected to both sides of the drum. The connecting blocks are fixedly sleeved on the rotating rod. A brake disc is fixedly connected to the side of the connecting block away from the drum. The brake disc is fixedly sleeved on the rotating rod. Mounting frames are fixedly connected to both sides of the bracket. A first servo motor is fixedly connected to the inner side wall of the mounting frame. Through the setting of the double-brake mechanism, the utility model effectively prevents the occurrence of the hook-sliding phenomenon, improves the safety performance, and prevents the hoisted goods and equipment from being damaged

[0004] There are some problems in the braking method of this crane during use. For example, there is no structure to ensure the stable progress of the bracket during operation. During the braking process, the brake disc may lock the rotating rod, affecting the stability and thus the possibility of danger. For this reason, we propose a double-girder bridge crane with safety braking. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the existing defects, provide a double-girder bridge crane with safety braking, which is safer to implement and will not occur the situation of locking, and can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a double-girder bridge crane with safety braking, including a beam frame and an emergency safety braking mechanism;

[0007] Beam frame: The number of them is two. The bottom ends of the two beam frames are both slidably connected to a displacement frame. Limit guide rails are symmetrically arranged front and back on the inner side walls of the lower sides of the beam frames. A single-chip microcomputer is arranged outside the crane, and the input end of the single-chip microcomputer is electrically connected to an external power supply;

[0008] Emergency safety braking mechanism: It includes a drum rotating shaft, a braking drum, and a brake cable. The drum rotating shaft is rotatably connected between the front and rear inner walls of the displacement frame. A braking drum is fixedly sleeved on the outer arc surface of the drum rotating shaft, and a brake cable is wound around the outer arc surface of the braking drum.

[0009] Among them: It also includes an electric hoist. The electric hoist is arranged at the bottom end of the displacement frame, and the input end of the electric hoist is electrically connected to the output end of the single-chip microcomputer, making it safer to implement and preventing the situation of locking.

[0010] Furthermore, the emergency safety braking mechanism also includes an installation sealing box, a worm, and a worm gear. The installation sealing box is arranged on the front side of the displacement frame. The front end of the drum rotating shaft is fixedly connected with a worm gear. A worm is rotatably connected between the upper and lower inner walls of the installation sealing box on the right side, and the worm is meshed with the worm gear to realize the function of braking transmission.

[0011] Furthermore, the emergency safety braking mechanism also includes a speed reducer. The speed reducer is arranged on the right side at the bottom end of the installation sealing box. The output shaft of the speed reducer is fixedly connected with the lower end of the worm. The input end of the speed reducer is electrically connected to the output end of the single-chip microcomputer to provide a limiting force for braking.

[0012] Furthermore, it also includes fixing plates. The fixing plates are respectively arranged on the left and right sides between the two beam frames. The right side surface of the left fixing plate is fixedly connected with the left end of the brake cable, and the left side surface of the right fixing plate is fixedly connected with the right end of the brake cable to realize the function of fixing both ends of the braking cable.

[0013] Furthermore, an installation plate is fixedly connected to both the left and right sides of the upper surfaces of the two beam frames to realize the function of installing the crane.

[0014] Furthermore, it also includes avoiding grooves. The avoiding grooves are respectively opened on the front side surfaces of the two beam frames. Fitting frames are symmetrically arranged on the left and right sides of the upper surface of the displacement frame. The inner parts of the fitting frames are respectively slidably connected with the outer surfaces of the beam frames on the same side.

[0015] Furthermore, it also includes moving wheels. The moving wheels are respectively rotatably connected to the interiors of the four fitting frames. The four moving wheels are respectively installed in cooperation with the interiors of the longitudinal position corresponding limit guiding rails. Driving motors are arranged on the outer surfaces of the four fitting frames. The output shafts of the driving motors are fixedly connected with the middle parts of the moving wheels on the same side. The middle parts of the moving wheels are respectively slidably connected with the interiors of the longitudinal position corresponding avoiding grooves. The input ends of the four driving motors are respectively electrically connected to the output end of the single-chip microcomputer to provide power for the change of the position of the electric hoist.

[0016] Compared with the prior art, the beneficial effects of the present utility model are: This safety braking double-girder bridge crane has the following advantages:

[0017] 1. During the movement of the displacement frame, the brake cable is always wound around the groove on the outer arc surface of the brake drum for a specified number of turns. The brake drum is also subjected to the force transmitted by the speed reducer. This directional rotational force ensures the rotational speed of the brake drum, and thus ensures the stability of the displacement frame during left-right position adjustment through the brake cable.

[0018] 2. During braking, the process of the brake cable rotating cyclically on the outer surface of the brake drum will slow down until it locks. During this process, the worm and worm gear ensure the stability of the deceleration and stopping of the brake drum. By reducing the rotational speed of the brake drum, the inertial force of the displacement frame movement is offset, making it safer to implement and preventing the situation of locking. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the present utility model;

[0020] Figure 2 It is a schematic structural diagram of the emergency safety braking mechanism of the present utility model;

[0021] Figure 3 It is an enlarged schematic structural diagram at position A of the present utility model;

[0022] Figure 4 It is a schematic structural diagram of the moving wheel of the present utility model;

[0023] Figure 5 It is a schematic structural diagram of the brake drum of the present utility model.

[0024] In the figure: 1 beam frame, 2 displacement frame, 3 avoidance groove, 4 fitting frame, 5 moving wheel, 6 emergency safety braking mechanism, 61 installation and sealing box, 62 rotating shaft, 63 brake drum, 64 brake cable, 65 worm, 66 worm gear, 67 speed reducer, 7 electric hoist, 8 driving motor, 9 single-chip microcomputer, 10 installation plate. Specific Embodiment

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-5 , this embodiment provides a technical solution: a safety braking double-girder bridge crane, including a beam frame 1 and an emergency safety braking mechanism 6;

[0027] Beam frame 1: There are two of them. The bottom ends of the two beam frames 1 are both slidably connected to a displacement frame 2. Limiting guide rails are symmetrically arranged front and back on the inner walls on the lower sides of the beam frames 1. A single-chip microcomputer 9 is provided outside the crane. The input end of the single-chip microcomputer 9 is electrically connected to an external power supply. Installation plates 10 are fixedly connected to the left and right sides of the upper surfaces of the two beam frames 1. An avoidance groove 3 is further included. The avoidance grooves 3 are respectively opened on the front sides of the two beam frames 1. Fitting frames 4 are symmetrically arranged left and right on the upper surfaces of the displacement frame 2. The inner parts of the fitting frames 4 are respectively slidably connected to the outer surfaces of the beam frames 1 on the same side. Moving wheels 5 are further included. The moving wheels 5 are respectively rotatably connected to the interiors of the four fitting frames 4. The four moving wheels 5 are all installed in cooperation with the interiors of the limiting guide rails corresponding in the longitudinal position. Driving motors 8 are arranged on the outer surfaces of the four fitting frames 4. The output shafts of the driving motors 8 are fixedly connected to the middles of the moving wheels 5 on the same side. The middles of the moving wheels 5 are respectively slidably connected to the interiors of the avoidance grooves 3 corresponding in the longitudinal position. During the process of the moving wheels 5 sliding in the avoidance grooves 3, they rotate by themselves. The input ends of the four driving motors 8 are respectively electrically connected to the output end of the single-chip microcomputer 9. When this crane needs to be used, the single-chip microcomputer 9 can be adjusted. The four driving motors 8 operate simultaneously. The output shafts of the four driving motors 8 rotate, thereby driving the four moving wheels 5 to move left and right in the limiting guide rails. During the process of the moving wheels 5 sliding in the avoidance grooves 3, they rotate by themselves, thereby driving the displacement frame 2 to adjust its left and right positions;

[0028] Emergency safety braking mechanism 6: It includes a drum rotating shaft 62, a braking drum 63 and a brake cable 64. The drum rotating shaft 62 is rotatably connected between the front and rear inner walls of the displacement frame 2. A braking drum 63 is fixedly sleeved on the outer arc surface of the drum rotating shaft 62. A brake cable 64 is wound around the outer arc surface of the braking drum 63. The emergency safety braking mechanism 6 further includes an installation seal box 61, a worm 65 and a worm gear 66. The installation seal box 61 is arranged on the front side of the displacement frame 2. The front end of the drum rotating shaft 62 is fixedly connected with a worm gear 66. A worm 65 is rotatably connected between the upper and lower inner walls of the installation seal box 61 on the right side. The worm 65 is meshed with the worm gear 66. The emergency safety braking mechanism 6 further includes a speed reducer 67. The speed reducer 67 is arranged on the right side at the bottom of the installation seal box 61. The output shaft of the speed reducer 67 is fixedly connected with the lower end of the worm 65. The input end of the speed reducer 67 is electrically connected to the output end of the single-chip microcomputer 9. It also includes fixing plates which are respectively arranged on the left and right sides between the two beam frames 1. The right side surface of the left fixing plate is fixedly connected with the left end of the brake cable 64. The left side surface of the right fixing plate is fixedly connected with the right end of the brake cable 64. When adjusting the single-chip microcomputer 9, the speed reducer 67 also operates simultaneously, thereby driving the worm 65 to rotate forward and backward, thereby driving the worm gear 66 to rotate forward and backward, thereby driving the braking drum 63 to rotate through the drum rotating shaft 62, thereby driving the brake cable 64 to rotate circularly on the outer surface of the braking drum 63. Because the brake cable 64 is of a specified length, the number of turns of the brake cable 64 wound on the outer surface of the braking drum 63 is always the specified number of turns. During the forward and backward processes of the braking drum 63, only the winding position of the brake cable 64 on the braking drum 63 is changed, but its number of turns remains unchanged. When braking operation is required, the single-chip microcomputer 9 can be adjusted, and the four driving motors 8 stop operating, thereby stopping the power supply of the moving wheels 5. At the same time, the speed of the speed reducer 67 also decreases slowly until it is turned off. During this process, the speed of the worm 65 also decreases slowly until it is turned off. Thereby, the speed of the drum rotating shaft 62 driven by the worm gear 66 also decreases slowly until it is turned off. The number of turns of the brake cable 64 wound around the outer arc surface of the braking drum 63 will increase the grasping force. Also, due to the meshing force between the worm 65 and the worm gear 66, it further adapts to the process of the speed of the drum rotating shaft 62 decreasing slowly until it is turned off. After braking, it is also subject to the self-locking force of the worm 65 and the worm gear 66 to lock the drum rotating shaft 62. When the electric hoist 7 under the displacement frame 2 works and lifts goods, due to the inertial force received by the displacement frame 2, it will be offset by the brake cable 64 wound on the braking drum 63, preventing the possibility of the displacement frame 2 slipping.

[0029] Among them: It also includes an electric hoist 7. The electric hoist 7 is arranged at the bottom of the displacement frame 2. The input end of the electric hoist 7 is electrically connected to the output end of the single-chip microcomputer 9 to change the position of the electric hoist 7.

[0030] The working principle of a safety-braking double-girder bridge crane provided by the present utility model is as follows: When the crane needs to be used, the single-chip microcomputer 9 can be adjusted. The four driving motors 8 operate simultaneously, and the output shafts of the four driving motors 8 rotate, thereby driving the four moving wheels 5 to move left and right on the limit guide rail. During the process of the moving wheels 5 sliding in the avoidance groove 3, they also rotate by themselves, thereby driving the displacement frame 2 to adjust its left and right position, changing the position of the electric hoist 7. At the same time, the single-chip microcomputer 9 is adjusted, and the speed reducer 67 also operates simultaneously, thereby driving the worm 65 to rotate forward and backward, and then the worm gear 66 rotates forward and backward. Then, the braking drum 63 is driven to rotate through the drum rotating shaft 62, and the brake cable 64 is driven to rotate circularly on the outer surface of the braking drum 63. Since the brake cable 64 has a specified length, the number of turns of the brake cable 64 wound on the outer surface of the braking drum 63 is always the specified number of turns. During the forward and backward rotation of the braking drum 63, only the winding position of the brake cable 64 on the braking drum 63 is changed, but its number of turns remains unchanged. When braking operation is required, the single-chip microcomputer 9 can be adjusted, and the four driving motors 8 stop operating, so that the power supply to the moving wheels 5 stops. At the same time, the speed of the speed reducer 67 also slowly decreases until it is turned off. During this process, the speed of the worm 65 also slowly decreases until it is turned off. Then, the speed of the drum rotating shaft 62 is driven to slowly decrease until it is turned off through the worm gear 66. The number of turns of the brake cable 64 wound on the outer arc surface of the braking drum 63 will increase the tightening force, and it is also affected by the meshing force of the worm 65 and the worm gear 66, further adapting to the process of the speed of the drum rotating shaft 62 slowly decreasing until it is turned off. After braking, it is also affected by the self-locking force of the worm 65 and the worm gear 66 to lock the drum rotating shaft 62. When the electric hoist 7 under the displacement frame 2 works and lifts goods, due to the inertial force received by the displacement frame 2, it will be offset by the brake cable 64 wound on the braking drum 63, preventing the displacement frame 2 from slipping.

[0031] It should be noted that the single-chip microcomputer 9 disclosed in the above embodiments has a specific model of S7-200. The speed reducer 67, the electric hoist 7, and the driving motor 8 can be freely configured according to the actual application scenario. It is recommended to select a B750Y38L5H electromagnetic braking speed reducer for the speed reducer 67, a PA400 model micro-electric hoist for the electric hoist 7, and a JC square planetary speed reducer for the driving motor 8. The single-chip microcomputer 9 controls the operation of the speed reducer 67, the electric hoist 7, and the driving motor 8 using the methods commonly used in the existing technology.

[0032] The above description is only an embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A safety braking double-girder bridge crane, characterized in that: It includes a beam frame (1) and an emergency safety braking mechanism (6); Beam frame (1): There are two of them. The bottoms of the two beam frames (1) are both slidably connected to a displacement frame (2). Limited guiding rails are symmetrically arranged front and back on the inner walls of the lower sides of the beam frames (1). A single-chip microcomputer (9) is provided outside the crane, and the input end of the single-chip microcomputer (9) is electrically connected to an external power supply; Emergency safety braking mechanism (6): It includes a drum rotating shaft (62), a braking drum (63) and a braking cable (64). The drum rotating shaft (62) is rotatably connected between the front and rear inner walls of the displacement frame (2). A braking drum (63) is fixedly sleeved on the outer arc surface of the drum rotating shaft (62), and a braking cable (64) is wound around the outer arc surface of the braking drum (63); Among them: It also includes an electric hoist (7). The electric hoist (7) is arranged at the bottom end of the displacement frame (2), and the input end of the electric hoist (7) is electrically connected to the output end of the single-chip microcomputer (9).

2. The double-girder bridge crane with safety braking according to claim 1, wherein: The emergency safety braking mechanism (6) also includes an installation and sealing box (61), a worm (65) and a worm gear (66). The installation and sealing box (61) is arranged on the front side of the displacement frame (2). The front end of the drum rotating shaft (62) is fixedly connected with a worm gear (66). A worm (65) is rotatably connected between the upper and lower inner walls of the installation and sealing box (61) on the right side, and the worm (65) is meshed with the worm gear (66).

3. The safety braking double-girder bridge crane according to claim 2, characterized in that: The emergency safety braking mechanism (6) also includes a speed reducer (67). The speed reducer (67) is arranged on the right side at the bottom end of the installation and sealing box (61). The output shaft of the speed reducer (67) is fixedly connected with the lower end of the worm (65), and the input end of the speed reducer (67) is electrically connected to the output end of the single-chip microcomputer (9).

4. A safety braking double-girder bridge crane according to claim 1, characterized in that: It also includes fixing plates. The fixing plates are respectively arranged on the left and right sides between the two beam frames (1). The right side surface of the left fixing plate is fixedly connected with the left end of the braking cable (64), and the left side surface of the right fixing plate is fixedly connected with the right end of the braking cable (64).

5. A safety braking double-girder bridge crane according to claim 1, characterized in that: On the left and right sides of the upper surfaces of the two beam frames (1), a mounting plate (10) is fixedly connected respectively.

6. The double-girder bridge crane with safety braking according to claim 1, characterized in that: It also includes avoidance grooves (3). The avoidance grooves (3) are respectively opened on the front side surfaces of the two beam frames (1). Fitting frames (4) are symmetrically arranged left and right on the upper surface of the displacement frame (2). The inner parts of the fitting frames (4) are respectively slidably connected to the outer surfaces of the beam frames (1) on the same side.

7. A double-girder overhead crane with safety braking according to claim 6, characterized in that: It also includes moving wheels (5). The moving wheels (5) are respectively rotatably connected to the interiors of the four fitting frames (4). The four moving wheels (5) are all fitted and installed with the interiors of the limited guiding rails corresponding to the longitudinal positions. Driving motors (8) are arranged on the outer surfaces of the four fitting frames (4). The output shafts of the driving motors (8) are fixedly connected with the middles of the moving wheels (5) on the same side. The middles of the moving wheels (5) are respectively slidably connected to the interiors of the avoidance grooves (3) corresponding to the longitudinal positions. The input ends of the four driving motors (8) are respectively electrically connected to the output end of the single-chip microcomputer (9).

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