Gantry crane safety protection device

Abstract

The utility model discloses a gantry crane safety protection device which comprises a lifting frame, a lifting basket is arranged in the lifting frame, a bearing seat is arranged on the upper portion of the lifting frame and used for being rotationally connected with the two ends of a rotating shaft, a motor is arranged at the top of the lifting frame, and a transmission gear at the output end of the motor is meshed with a gear ring; the other ends of the lifting ropes are connected with the binding posts on the two side edges of the hanging basket; when the hanging basket stalls and falls, the hanging basket drives a rotating shaft to rotate rapidly through a hanging rope, then a rotating disc is driven to rotate rapidly, an inserting block in a sliding groove rotates in an accelerated mode, the inserting block pulls a first spring to extend under the action of centrifugal force, and the top end of the inserting block stretches out of the sliding groove to make contact with a stopping block on the outer side of the rotating disc. And in other words, the device can brake and protect the hanging basket in the stall falling process of the hanging basket, and the safety of the gantry crane during operation is improved.

Description

Technical Field

[0001] This utility model belongs to the field of safety protection technology for lifting equipment, and specifically relates to a safety protection device for gantry cranes. Background Technology

[0002] Gantry cranes, as large lifting equipment, are widely used in ports, construction sites and other places. Their safety is directly related to the life safety of the workers and the integrity of the goods.

[0003] However, in some cases, such as when the hoisting motor brake fails or the motor control operation is malfunctioning, the hoist may be at risk of stalling and falling. A rapid fall of the hoist can easily cause damage to the goods or personnel carried on it. Utility Model Content

[0004] This application proposes a safety protection device for gantry cranes, which can be used to brake and protect the gantry crane from sudden fall, thereby improving the safety of gantry crane operation.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A safety protection device for a gantry crane includes a frame, a basket inside the frame, the basket being positioned between the support rods of the frame, a bearing seat on the upper part of the frame for rotatable connection to both ends of a rotating shaft, a motor on the top of the frame, a gear ring fixedly connected to the outer surface of the rotating shaft, a transmission gear at the output end of the motor meshing with the gear ring, cable grooves at both ends of the rotating shaft for connecting one end of a suspension rope, and the other end of the suspension rope for connecting to terminals on both sides of the basket, and a rope anti-fall assembly at both ends of the rotating shaft, the rope anti-fall assembly including a turntable connected to the outer surface of both ends of the rotating shaft and a stop block connected to the side of the bearing seat, a groove on the turntable, an insert block inside the groove, the bottom end of the insert block being connected to the bottom surface of the groove via a first spring, and the stop block surrounding the outer side of the turntable.

[0007] In one embodiment of this application, a hanging piece is connected to the side wall of the stop block and the top of the insert block.

[0008] In one embodiment of this application, a limiting block is connected to the bottom side wall of the suspended basket, and a pulley is installed on the limiting block so that the limiting block slides in contact with the outer wall of the support rod.

[0009] In one embodiment of this application, a buffer column is provided at the bottom of the hanging frame. The buffer column includes a base and a support column inserted into the base. The bottom end face of the support column is connected to the base by a second spring.

[0010] In one embodiment of this application, a plurality of buffer columns are provided at the bottom of the hanging frame.

[0011] In one embodiment of this application, conduits are installed on both sides of the hanging frame, and the hanging rope passes through the conduits.

[0012] In one embodiment of this application, a trigger is provided inside the base, and the trigger is electrically connected to the counter.

[0013] In summary, the technical solution proposed in this application includes the following beneficial technical effects: A groove is provided on the turntable, and an insert block is installed within the groove. The bottom surface of the insert block is connected to the inner bottom surface of the groove via a first spring. When the rotating shaft is stationary or rotating at a constant speed, the first spring pulls the insert block to retract within the groove. When the gantry experiences a stall and falls, the gantry, through the hoisting rope, drives the rotating shaft to rotate rapidly, which in turn drives the turntable to rotate rapidly. This causes the insert block within the groove to accelerate, resulting in the insert block being subjected to centrifugal force, which pulls the first spring to extend. The top of the insert block extends out of the groove and contacts a stop block on the outer side of the turntable. This causes the stop block to brake the turntable, preventing the rotating shaft from rotating and the hoisting rope from extending to stop the gantry from falling. This prevents the gantry from falling directly to the ground in a stall state, thus avoiding damage to equipment and personnel. In other words, this device can brake and protect the gantry during a stall and fall, which is beneficial to improving the safety of the gantry crane during operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of a gantry crane safety protection device provided in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram of the lifting frame structure of a gantry crane safety protection device provided in an embodiment of this application;

[0017] Figure 3 for Figure 2 Enlarged view of point A;

[0018] Figure 4 for Figure 2 Enlarged view of point B;

[0019] Figure 5 This is a schematic diagram of the structure of the gantry crane safety protection device rope anti-fall component provided in an embodiment of this application;

[0020] Figure 6A schematic diagram of the buffer column structure of the safety protection device for a gantry crane provided in an embodiment of this application;

[0021] In the diagram: 1. Hanging frame, 11. Support rod, 12. Bearing seat, 121. Rotating shaft, 122. Gear ring, 123. Winding groove, 124. Hanging rope, 13. Motor, 14. Conduit.

[0022] Suspended platform 2, terminal block 21;

[0023] The suspension rope anti-fall component 4, turntable 41, slide 411, insert block 412, first spring 413, and stop block 42;

[0024] Buffer post 5, base 51, support post 52, second spring 53, trigger 54.

[0025] Hanging piece 6;

[0026] Limit block 7, pulley 71. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0028] It should be noted that in the description of this application, the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] In this application, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0030] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0031] This embodiment provides a safety protection device for a gantry crane, see reference. Figures 1-6 As shown, the device includes a hanging frame 1, within which a hanging basket 2 is installed. The hanging basket 2 is positioned between the support rods 11 of the hanging frame 1. A bearing seat 12 is installed on the upper part of the hanging frame 1, which is used for rotatable connection with both ends of a rotating shaft 121. A motor 13 is installed on the top of the hanging frame 1. A gear ring 122 is fixedly connected to the outer surface of the rotating shaft 121. The output transmission gear of the motor 13 meshes with the gear ring 122. Winding grooves 123 are provided at both ends of the rotating shaft 121, and one end of the winding groove 123 is connected to a hanging rope 124. The other end of the suspension rope 124 is connected to the terminal blocks 21 on both sides of the suspended basket 2. The two ends of the rotating shaft 121 are provided with suspension rope anti-fall components 4. The suspension rope anti-fall components 4 include a turntable 41 connected to the outer ring surface of both ends of the rotating shaft 121 and a stop block 42 connected to the side of the bearing seat 12. The turntable 41 is provided with a sliding groove 411. An insert block 412 is provided in the sliding groove 411. The bottom end of the insert block 412 is connected to the bottom surface of the sliding groove 411 through a first spring 413. The stop block 42 is arranged around the outside of the turntable 41.

[0032] In the above embodiment, a hanging basket 2 is provided inside the hanging frame 1, and the hanging basket 2 is located between the support rods 11 of the hanging frame 1. A bearing seat 12 is provided on the upper part of the hanging frame 1. The bearing seat 12 is used to rotatably connect with both ends of the rotating shaft 121, so that both ends of the rotating shaft 121 can rotate in the rotating holes of the bearing seat 12. A gear ring 122 is fixedly connected to the outer ring surface of the middle part of the rotating shaft 121. The transmission gear at the output end of the motor 13 located at the top of the hanging frame 1 meshes with the gear ring 122. The motor 13 drives the transmission gear at the output end to rotate, thereby driving the gear ring 122 to make the rotating shaft 121 rotate. Furthermore, the rotating shaft 121 is provided with cable winding grooves 123 at both ends. One end of the cable winding groove 123 is connected to the suspension rope 124, and the other end of the suspension rope 124 is connected to the terminal blocks 21 on both sides of the suspended basket 2. Rotation of the rotating shaft 121 drives the cable winding groove 123 to rotate, thereby causing the suspension rope 124 connected to the cable winding groove 123 to be wound up and down. The winding and unwinding of the suspension rope 124 then pulls the suspended basket 2 up and down within the suspended frame 1. Furthermore, the rotating shaft 121 is provided with suspension rope anti-fall components 4 at both ends, including a turntable 41 connected to the outer ring surface of both ends of the rotating shaft 121 and a stop block 42 connected to the side of the bearing seat 12. Figure 4As shown, a groove 411 is provided on the turntable 41, and an insert 412 is provided in the groove 411. The bottom surface of the insert 412 is connected to the inner bottom surface of the groove 411 through a first spring 413. When the rotating shaft 121 is stationary or rotating at a constant speed, the first spring 413 pulls the insert 412 to retract into the groove 411. When the basket 2 drops rapidly, the basket 2 drives the rotating shaft 121 to rotate rapidly through the suspension rope 124, which in turn drives the turntable 41 to rotate rapidly. This causes the insert 412 in the groove 411 to follow the turntable 41 in accelerated circular rotation. According to the formula for calculating the centrifugal force of an object's circular motion, F = mV² / R, where F is the centrifugal force on the insert 412. When the rotational speed V of the insert 412 increases, the centrifugal force F on the insert 412 increases significantly due to the square relationship of velocity. According to Hooke's law of spring force, X = F / K and X represent the displacement (or deformation) of the spring, and K represents the spring constant. This causes the insert block 412 to be pulled by the increased centrifugal force F, which causes the first spring 413 to deform and extend. The two side walls of the insert block 412 are slidably connected to the inner wall of the slide groove 411, so that the top of the insert block 412 slides out of the slide groove 411 and contacts the stop block 42 on the outside of the turntable 41. This causes the stop block 42 to brake the turntable 41, so that the rotating shaft 121 stops rotating and the hoisting rope 124 cannot extend, thus stopping the basket 2 from falling and preventing the basket 2 from falling directly to the ground in a stall state, causing damage to equipment and personnel. In other words, this device can brake and protect the basket 2 during the stall fall, which is beneficial to improving the safety of the gantry crane during operation.

[0033] It should be noted that the first spring 413 must ensure that the insert block 412 does not completely detach from the slide groove 411 under the action of centrifugal force.

[0034] In one embodiment of this application, see reference Figure 4 and Figure 5 As shown, a hanging piece 6 is connected to the side wall of the stop block 42 and the top of the insert block 412.

[0035] In the above embodiment, after the stop block 42 and the insert block 412 come into contact, they brake the turntable 41 and then the rotating shaft 121. When the turntable 41 stops rotating, the centrifugal force on the insert block 412 disappears, and the insert block 412 is pulled back by the first spring 413 and retracts into the slide groove 411, so that the rotating shaft 121 is released from braking. The rotating shaft 121 will rotate again. If the basket 2 does not fall back to the ground at this time, the basket 2 will continue to fall. The side wall of the stop block 42 and the top of the insert block 412 are connected to the hanging piece 6, which can make the hanging piece 6 on the stop block 42 and the insert block 412 hook each other when the stop block 42 and the insert block 412 come into contact, so as to prevent the insert block 412 from retracting into the slide groove 411 after the turntable 41 stops, which would cause the basket 2 to continue to fall. This is beneficial to improving the stability when the stop block 42 and the insert block 412 come into contact and brake.

[0036] In one embodiment of this application, see [reference] Figure 2 As shown, a limiting block 7 is connected to the bottom side wall of the suspended basket 2, and a pulley 71 is installed on the limiting block 7, so that the limiting block 7 slides in contact with the outer wall of the support rod 11.

[0037] In the above embodiment, the limiting block 7 is used to contact the outer wall of the support rod 11 to prevent the basket 2 from swaying inside the frame 1 when it is pulled by the suspension rope 124. This helps to improve the stability of the basket 2 when it moves up and down. In addition, the limiting block 7 is equipped with a pulley 71 so that the limiting block 7 slides in contact with the outer wall of the support rod 11, thereby reducing the friction when the limiting block 7 contacts the side wall of the support rod 11, which helps to improve the smoothness of the basket 2 when it moves up and down.

[0038] In one embodiment of this application, see reference Figure 6 As shown, a buffer column 5 is provided at the bottom of the hanging frame 1. The buffer column 5 includes a base 51 and a support column 52 inserted into the base 51. The bottom end face of the support column 52 is connected to the base 51 by a second spring 53.

[0039] In the above embodiment, when the basket 2 falls, the bottom surface contacts the top surface of the support column 52, causing the support column 52 to move downward and compress the second spring 53 between the support column 52 and the base 51. This converts the kinetic energy of the basket 2 when it falls into the elastic potential energy of the second spring 53 when it is compressed, thereby reducing the impact force on the basket 2 when it falls and improving the stability of the basket 2 when it falls to the ground.

[0040] In one embodiment of this application, see reference Figure 3 As shown, the bottom of the hanging frame 1 is provided with multiple buffer columns 5.

[0041] In the above embodiment, a plurality of buffer columns 5 are provided at the bottom of the hanging frame 1, and the plurality of buffer columns 5 are evenly distributed at the bottom of the hanging frame 1, so that when the hanging basket 2 falls, the bottom surface of the hanging basket 2 contacts the plurality of buffer columns 5, so that the bottom of the hanging basket 2 is evenly stressed, and the uneven stress caused by the contact between the bottom surface of the hanging basket 2 and a single buffer column 5 is avoided, which would cause deformation of the bottom of the hanging basket 2.

[0042] In one embodiment of this application, see reference Figure 2 As shown, the two sides of the hanging frame 1 are equipped with wire conduits 14, and the hanging rope 124 passes through the wire conduits 14.

[0043] In the above embodiment, the guide tube 14 is arranged vertically, and the suspension rope 124 passes through the guide tube 14 to limit the traction direction of the suspension rope 124, so that the suspension rope 124 maintains a vertical traction direction on the suspended basket 2, which is beneficial to improving the stability of the suspended basket 2 during operation.

[0044] In one embodiment of this application, see reference Figure 6As shown, a trigger 54 is provided inside the base 51, and the trigger 54 is electrically connected to the counter.

[0045] In the above embodiment, each time the suspended platform 2 falls, it presses down the support column 52, causing the bottom end of the support column 52 to touch the trigger 54. The trigger 54 can be a touch switch. The height of the trigger 54 is set to be greater than the height of the second spring 53 after compression, so that the support column 52 can contact the trigger 54 when it squeezes the second spring 53. The trigger 54 is electrically connected to a counter, which is used to record the number of times the support column 52 touches the trigger 54. Maintenance personnel can determine the usage frequency of the gantry crane based on the number of times the counter records, and thus carry out effective equipment inspection and maintenance.

[0046] In actual use, the transmission gear at the output end of the motor 13 rotates, thereby driving the gear ring 122 to rotate the shaft 121. The rotation of the shaft 121 drives the winding groove 123 to rotate, thereby causing the suspension rope 124 connected to the winding groove 123 to be wound up and down. The winding and unwinding of the suspension rope 124 then pulls the basket 2 to move up and down within the frame 1. Suspension rope anti-fall components 4 are provided at both ends of the shaft 121, including a turntable 41 connected to the outer ring surface of both ends of the shaft 121 and a stop block 42 connected to the side of the bearing seat 12. An insert block 412 is provided in the slide groove 411, and the bottom surface of the insert block 412 is connected to the inner bottom surface of the slide groove 411 through a first spring 413. When the shaft 121 is stationary or rotating at a constant speed, the first spring 413 pulls the insert block 412 to retract into the slide groove 411. When the suspended platform 2 loses speed and falls, the suspended platform 2 drives the rotating shaft 121 to rotate rapidly through the suspension rope 124, which in turn drives the turntable 41 to rotate rapidly. This causes the insert block 412 in the slide groove 411 to pull the first spring 413 to extend under the action of centrifugal force, and the top of the insert block 412 extends out of the slide groove 411 and contacts the stop block 42 on the outside of the turntable 41. This causes the stop block 42 to brake the turntable 41, so that the rotating shaft 121 stops rotating and the suspension rope 124 cannot extend to pull the suspended platform 2 to stop falling, thus preventing the suspended platform 2 from falling directly to the ground in a state of stall.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A gantry crane safety guard comprising: The utility model relates to a kind of aerial work platform, including hanging frame (1), the hanging basket (2) is arranged in the hanging frame (1), the hanging basket (2) is arranged between the support pole (11) of hanging frame (1), the upper portion of the hanging frame (1) is provided with bearing seat (12), the bearing seat (12) is used to be rotatably connected with the both ends of rotating shaft (121), the top of the hanging frame (1) is provided with motor (13), the outer circle surface of the rotating shaft (121) is fixedly connected with gear ring (122), the output end transmission gear of the motor (13) is engaged with gear ring (122), the rotating shaft (121) both ends are provided with winding slot (123), the winding slot (123) is connected with the one end of the rope (124), the other end of the rope (124) is connected with the terminal post (21) of the both sides of the hanging basket (2), the rotating shaft (121) both ends are provided with rope anti-falling assembly (4), the rope anti-falling assembly (4) includes the rotating disc (41) of the outer circle surface connection of rotating shaft (121) both ends and the baffle (42) connected on the side surface of bearing seat (12), the rotating disc (41) is provided with sliding slot (411), the sliding slot (411) is provided with plug (412), the bottom end surface of the plug (412) is connected with the bottom surface of sliding slot (411) by first spring (413), the baffle (42) is arranged around the outside of rotating disc (41).

2. The gantry crane safety shield of claim 1, wherein, The side wall of the baffle (42) and the top end of the plug (412) are connected with the hanging piece (6).

3. The gantry crane safety shield of claim 1, wherein, The bottom end side wall of the hanging basket (2) is connected with the limit block (7), the limit block (7) is installed with the pulley (71) so that the limit block (7) is in sliding contact with the outer wall of the support pole (11).

4. The gantry crane safety shield of claim 1, wherein, The bottom of the hanging frame (1) is provided with buffer column (5), the buffer column (5) includes base (51) and support column (52) inserted in the base (51), the bottom end surface between the support column (52) and the base (51) is connected by second spring (53).

5. The gantry crane safety shield of claim 4, wherein, The bottom of the hanging frame (1) is provided with a plurality of buffer columns (5).

6. The gantry crane safety shield of claim 1, wherein, The both sides of the hanging frame (1) are installed with wire tube (14), the rope (124) passes through the wire tube (14).

7. The gantry crane safety shield of claim 4, wherein, The base (51) is provided with trigger (54), and the trigger (54) is electrically connected with the counter.

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