Two-stage force boosting wind-resistant brake for rail portal crane

Abstract

The application discloses a two-stage force-amplifying strong-wind-resistant brake for a rail portal crane and belongs to the technical field of crane rail brake equipment. The brake comprises a brake box, an extension assembly, a brake assembly and a brake force adjusting assembly. The extension assembly is arranged on the brake box and moves in the vertical direction at the output end of the extension assembly. The output end of the extension assembly is provided with a pressing support, and the opposite sides of the pressing support are provided with symmetric pressing grooves. The pressing grooves are provided with pressing inclined surfaces. The brake assembly comprises a connecting plate and two groups of brake structures. The connecting plate is arranged in a cavity and located at the lower part of the brake box. The brake structure comprises a brake beam, an adjusting beam and a brake block. The brake force adjusting assembly is connected to the upper ends of the two adjusting beams, and adjusts the pressure at the upper ends of the two adjusting beams. The application solves the technical problem that the windproof capability of the traditional windproof measures is insufficient or the windproof capability cannot be quickly formed, which may affect the strong-wind-resistant safety of the portal crane.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of crane rail brake equipment, in particular to a two-stage force amplification wind-resistant brake for rail portal crane. BACKGROUND

[0002] The whole rail portal crane is supported by each wheel frame to travel on the rail, and the normal operation braking is realized by the braking system in the trolley traveling mechanism; the sudden strong wind encountered in the operation, the strong wind safety parking after the operation, etc. need to be prevented by the additional auxiliary devices such as strong rail clamps. The current conventional wind-resistant measures have the following shortcomings: first, the electric or hydraulic spring type rail clamps, etc. have small opening interval, high requirements for the rail quality, and unscientific braking force label, and the on-site personnel have certain difficulty in confirming and adjusting the braking force, and there are also problems of too large size and too high cost; second, the electric wheel clamps and electric shoes have serious insufficient braking force, which cannot meet the requirements of wind-resistant; third, the positioning anchoring device has strong fastening force, but can only be stored at a fixed point, and needs to be set up and removed by manual operation in advance, and has no dynamic braking function in the operation process, and cannot quickly form the wind-resistant capacity. The traditional wind-resistant measures have insufficient wind-resistant capacity or cannot quickly form the wind-resistant capacity, which may affect the wind-resistant safety of the portal crane. SUMMARY

[0003] The present application relates to the field of crane rail brake equipment, in particular to a two-stage force amplification wind-resistant brake for rail portal crane.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0005] The application discloses a two-stage force boosting windproof brake for a rail portal crane, which comprises a brake box, a driving assembly, a brake assembly and a brake force adjusting assembly; an upper and lower open cavity is arranged in the brake box; the driving assembly is arranged on the brake box; the output end of the driving assembly can move along the vertical direction relative to the brake box; an extrusion holder is arranged on the output end of the driving assembly; the opposite sides of the extrusion holder are symmetrically provided with extrusion grooves; and an extrusion slope is arranged in the extrusion groove; the brake assembly comprises a connecting plate and two groups of brake structures; the connecting plate is slidingly arranged in the cavity; the two groups of brake structures are symmetrically arranged about the connecting plate; the brake structure comprises a brake beam, an adjusting beam and a brake block; the middle part of the brake beam is rotationally connected with the connecting plate; the lower end of the adjusting beam can be clamped in the extrusion groove; the middle part of the adjusting beam is rotationally connected with the upper end of the brake beam; the brake block is hingedly connected with the lower part of the brake beam; a clamping part is arranged on the brake block; the two clamping parts of the two brake blocks form a clamping cavity capable of clamping the upper part of the rail; the brake force adjusting assembly is connected with the upper ends of the two adjusting beams; and the brake force adjusting assembly adjusts the pressure of the upper ends of the two adjusting beams.

[0006] Further, the extrusion groove is open to the outside; the upper side wall of the extrusion groove is obliquely arranged to form the extrusion slope; the lower end of the adjusting beam is provided with a rotating extrusion shaft sleeve; the extrusion shaft sleeve can be clamped in the extrusion groove and can be extruded with the extrusion slope.

[0007] Further, the outer side of the brake beam is provided with a limiting plate; the limiting plate is located above the opening of the cavity; when the output end of the driving assembly is located at the lowermost position, the limiting plate is in contact with the edge of the opening of the cavity.

[0008] Further, the brake assembly further comprises a return spring; one end of the return spring is fixedly connected with the upper part of one brake beam; the other end of the return spring is fixedly connected with the upper part of the other brake beam; the return spring has a tensioning force for making the two brake beams close to each other.

[0009] Further, the upper part of the brake block is provided with a positioning edge rod which is hingedly connected with the upper part of the brake block; the brake beam is provided with a movable cavity; the other end of the positioning edge rod is located in the movable cavity and is fixedly connected with the brake beam; a positioning spring is arranged on the positioning edge rod; one end of the positioning spring is connected with the brake block; the other end of the positioning spring is connected with the brake beam; and the positioning spring has a tensioning force.

[0010] Further, the brake force adjusting assembly comprises a bolt sleeve rod, an adjusting shaft, a spring pull rod, a positioning shaft, a brake spring, a pair of spring seat plates and a pre-tightening sleeve; one end of the bolt sleeve rod is connected with the upper end of one of the adjusting beams through the adjusting shaft, the other end of the bolt sleeve rod is provided with a sliding cavity, one end of the spring pull rod is connected with the upper end of the other adjusting beam through the positioning shaft, the other end of the spring pull rod is slidably arranged in the sliding cavity; the pre-tightening sleeve, the spring seat plates, the brake spring and the other spring seat plate are sequentially sleeved on the spring pull rod, the brake spring is compressed by the two spring seat plates and has elastic force; the end surface of the spring seat plate close to the bolt sleeve rod is fixedly connected with the bolt sleeve rod.

[0011] Further, the side of the bolt sleeve rod is provided with an observation port in communication with the sliding cavity, and the outer edge of the observation port is provided with a scale line arranged along the axial direction of the bolt sleeve rod.

[0012] Further, the upper part of the adjusting beam is provided with a rotating shaft, the rotating shaft is provided with a through hole arranged in the radial direction, the adjusting shaft and the positioning shaft are respectively inserted into the through hole, the outer end of the adjusting shaft and the outer end of the positioning shaft are respectively screwed with adjusting nuts, and the adjusting nuts are respectively abutted with the rotating shaft.

[0013] Further, the driving assembly is a hydraulic telescopic cylinder, and the hydraulic telescopic cylinder is controlled through an electric control hydraulic system.

[0014] By adopting the technical scheme, the application has the following beneficial effects:

[0015] 1. The brake box is fixed on the gantry crane by bolts and close to the stressed plate above the track during braking, the output end of the telescopic assembly moves to the lower limit position, the extrusion holder is driven to move downward, the brake assembly and the brake force adjusting assembly move downward at the same time, the connecting plate of the brake assembly is lowered to the upper end surface of the track first, ensuring the accurate alignment of the brake block with the side surface of the steel rail, under the extrusion of the extrusion slope, the upper end of the brake beam moves outward and the lower end moves inward, so that the two brake block clamping cavities tightly hold the upper part of the track, the elastic force of the brake force adjusting assembly is adjusted, at this time, the friction resistance between the brake block and the upper side surface of the steel rail is generated, the movement of the gantry crane connected with the brake box on the upper end surface of the track is affected by the resistance to produce the effect of preventing strong wind; when the brake is removed, the telescopic assembly drives the extrusion holder to rise, the extrusion of the extrusion slope is removed, the upper end of the brake beam moves inward and the lower end moves outward, so that the two brake blocks release the upper part of the track, the brake assembly is released, and then the output end of the telescopic assembly continues to rise, the extrusion holder lifts the brake force adjusting assembly and the brake assembly until the lower part of the brake assembly is completely lifted into the brake box, and the brake is removed. Based on the above, the brake can provide clamping force through the brake force adjusting assembly and the brake assembly, realize two-stage force amplification, solve the problem of insufficient windproof capacity of traditional windproof measures, facilitate the miniaturization and light weight of the brake; at the same time, the driver can control the lifting of the output end of the telescopic assembly, the brake and removal of the brake are completed by the driver alone, and the driver can operate at any time according to needs, so as to quickly form the strong windproof capacity; and the brake can be applied at any position on the track, having high mobility.

[0016] 2. The side of the brake beam is provided with a limiting plate, when the brake beam moves to the lowermost position, the limiting plate presses the brake box, and the limiting plate can limit the brake box from being lifted, thereby playing the role of anchoring the brake with the steel rail, so that the gantry crane has the anchoring function on the track.

[0017] 3. The brake is provided with a return spring, when the brake is removed, the telescopic assembly drives the extrusion holder to rise, the extrusion of the extrusion slope is removed, and the brake assembly can be quickly opened under the action of the return spring, preventing the brake assembly from being opened in time and causing resistance when the telescopic assembly drives the brake assembly to rise, thereby improving the reliability of the device.

[0018] 4. The over-adjusting nut can adjust the compression amount of the brake spring, and the observation port and the scale line are arranged, so as to facilitate checking the spring compression scale and obtaining the required brake force. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a side view of the present application.

[0020] Figure 2 is a partial sectional view of the present application.

[0021] Figure 3 is the structure diagram of the brake force adjusting assembly of the application.

[0022] Figure 4 is the schematic diagram of the electric control hydraulic system of the application.

[0023] In the drawings, 1-brake box, 2- telescopic assembly, 3-brake assembly, 4-brake force adjusting assembly, 5-electric control hydraulic system, 6-rail, 101-cavity, 201-extrusion holder, 202-extrusion groove, 203-extrusion slope, 204-mounting seat plate, 301-connection plate, 302-brake beam, 303-adjusting beam, 304-brake block, 305-extrusion shaft sleeve, 306-limiting plate, 307-return spring, 308-positioning rod, 309-positioning spring, 310-rotation shaft, 401-bolt sleeve rod, 402-adjusting shaft, 403-spring pull rod, 404-positioning shaft, 405-brake spring, 406-spring seat plate, 407-pre-tightening pressing sleeve, 408-adjusting nut, 409-sliding block, 410-sliding cavity, 411-observation port, 501-hydraulic working station, 502-electric control circuit, 503-first button, 504-second button, 505-first relay, 506-second relay, 507-first limit switch, 508-second limit switch. DETAILED DESCRIPTION

[0024] The specific implementation of the application is further illustrated below in combination with the drawings.

[0025] Please see Figures 1 to 2The utility model provides a two -stage force -enhancing anti -strong wind brake for rail portal crane, including brake box 1, telescopic component 2, brake component 3 and brake force adjusting component 4, be provided with the cavity 101 of upper and lower openings in brake box 1, telescopic component 2 is installed on brake box 1, and the output end of telescopic component 2 can move along the vertical direction relative to brake box 1, and the output end of telescopic component 2 is provided with extrusion support 201, and the opposite sides of extrusion support 201 are provided with the symmetrically arranged extrusion groove 202, and the extrusion groove 202 is provided with extrusion inclined plane 203, brake component 3 includes connecting plate 301 and two groups of brake structure, connecting plate 301 is slidably arranged in the cavity 101 and is located at the lower part of brake box 1, and the two groups of brake structure are symmetrically arranged about connecting plate 301, and the brake structure includes brake beam 302, adjusting beam 303 and brake block 304, the middle part of brake beam 302 is rotatably connected with connecting plate 301, the lower end of adjusting beam 303 can be clamped in extrusion groove 202, the middle part of adjusting beam 303 is rotatably connected with the upper end of brake beam 302, and brake block 304 is hinged with the lower part of brake beam 302, and the brake block 304 is provided with clamping part, and the two clamping parts of two brake blocks 304 form the clamping cavity that can clamp the upper part of rail 6, and brake force adjusting component 4 is connected with the upper end of two adjusting beams 303, and brake force adjusting component 4 adjusts the pressure of the upper end of two adjusting beams 303.

[0026] Specifically, the telescopic component 2 is a hydraulic telescopic cylinder, and the hydraulic telescopic cylinder is fixedly connected with the inner wall of the brake box 1 through a mounting seat plate 204; the internal dimensions of the brake box 1 can accommodate the brake component 3 to move up and down therein, and the longitudinal spacing between the brake box 1 and the brake component 3 is 3-5 mm, and the lateral spacing is 40 mm; after the brake box 1 is installed, the bottom of the brake box 1 is higher than the upper end surface of the rail 6 by 20-30 mm. The extrusion support 201 has a "J" shaped structure, and the movable end of the hydraulic telescopic cylinder is arranged in the "J" shaped structure.

[0027] In this embodiment, the extrusion groove 202 is open outward, the upper side wall of the extrusion groove 202 is inclined to form the extrusion inclined plane 203, the lower end of the adjusting beam 303 is sleeved with a rotatable extrusion shaft sleeve 305, the extrusion shaft sleeve 305 can be clamped in the extrusion groove 202 and can be extruded with the extrusion inclined plane 203.

[0028] In this embodiment, the outer side of the brake beam 302 is provided with a limiting plate 306 located above the opening of the cavity 101, and when the output end of the telescopic component 2 is located at the lowest position, the limiting plate 306 is in contact with the edge of the opening of the cavity 101. The side of the brake beam 302 is provided with a limiting plate 306, and when the brake beam 302 moves to the lowest position, the limiting plate 306 presses the brake box 1, and the limiting plate 306 can limit the brake box 1 from being warped, thereby playing the role of anchoring the brake and the steel rail, so that the portal crane realizes the anchoring function on the rail 6.

[0029] In the embodiment, the brake assembly 3 further comprises a return spring 307, one end of which is fixedly connected to the upper portion of one brake beam 302, and the other end of which is fixedly connected to the upper portion of the other brake beam 302, and the return spring 307 has a tension force for making the two brake beams 302 close to each other. When the brake is removed, the telescopic assembly 2 drives the extrusion holder 201 to rise, and the extrusion of the extrusion sleeve 305 by the extrusion slope 203 is removed, and the brake assembly 3 can be quickly opened under the action of the return spring 307, so as to prevent the brake assembly 3 from being opened in time and causing resistance when the telescopic assembly 2 drives the brake assembly 3 to rise, thereby improving the reliability of the device.

[0030] In the embodiment, the lower portion of the brake block 304 is hingedly connected to the lower portion of the brake beam 302, and in addition, the brake block 304 is provided with a positioning rod 308 having one end hingedly connected to the upper portion of the brake block 304, the brake beam 302 is provided with a movable cavity, the other end of the positioning rod 308 is located in the movable cavity, and a positioning spring 309 is sleeved on the positioning rod 308, one end of the positioning spring 309 is connected to the positioning rod 308, and the other end of the positioning spring 309 is connected to the brake beam 302, and the positioning spring 309 has a tension force.

[0031] Please refer to Figure 3 In the embodiment, the brake force adjusting assembly 4 comprises a bolt sleeve rod 401, an adjusting shaft 402, a spring pull rod 403, a positioning shaft 404, a brake spring 405, a pair of spring seat plates 406, and a pre-tightening pressing sleeve 407; one end of the bolt sleeve rod 401 is connected to the upper end of one adjusting beam 303 through the adjusting shaft 402, the other end of the bolt sleeve rod 401 is provided with a sliding cavity 410, one end of the spring pull rod 403 is connected to the upper end of the other adjusting beam 303 through the positioning shaft 404, and the other end of the spring pull rod 403 is slidingly arranged in the sliding cavity 410; the pre-tightening pressing sleeve 407, the spring seat plates 406, the brake spring 405, and the other spring seat plate 406 are sequentially sleeved on the spring pull rod 403, the brake spring 405 is compressed by the two spring seat plates 406 and has a spring force; the end face of the spring seat plate 406 close to the bolt sleeve rod 401 is fixedly connected to the bolt sleeve rod 401, the end portion of the spring pull rod 403 is provided with a sliding block 409 having the same diameter as the inner diameter of the sliding cavity 410, and the spring seat plate 406 can limit the sliding block 409 from sliding out of the sliding cavity 410.

[0032] The side of the bolt sleeve rod 401 is provided with an observation port 411 communicated with the sliding cavity 410, and the outer edge of the observation port 411 is provided with a scale line arranged along the axis direction of the bolt sleeve rod 401. The upper part of the adjusting beam 303 is provided with a rotating shaft 310, the rotating shaft 310 is provided with a through hole arranged in the radial direction, the adjusting shaft 402 and the positioning shaft 404 are respectively penetrated into the through hole, the outer end of the adjusting shaft 402 and the outer end of the positioning shaft 404 are respectively screwed with adjusting nuts 408, and the adjusting nuts 408 are respectively abutted with the rotating shaft 310. The elastic force of the brake spring 405 is adjusted through the adjusting nuts 408. Specifically, when the upper ends of the two adjusting beams 303 are close to each other by rotating the adjusting nuts 408, the compression amount of the brake spring 405 increases, and the elastic force increases. When the upper ends of the two adjusting beams 303 are away from each other by rotating the adjusting nuts 408, the compression amount of the brake spring 405 decreases, and the elastic force decreases. By arranging the rotating shaft 310, when the upper ends of the two adjusting beams 303 are close to or away from each other, the rotating shaft 310 is rotated to make the adjusting shaft 402 and the positioning shaft 404 located on the same axis, so as to prevent the brake force adjusting assembly 4 from being bent and deformed and damaged. By arranging the observation port 411 and the scale line, the spring compression scale can be checked, and the required brake force can be obtained. In order to prevent the adjusting nuts 408 from loosening, the adjusting nuts 408 arranged on the adjusting shaft 402 or the positioning shaft 404 are arranged in pairs.

[0033] Please refer to Figure 4 In the embodiment, the hydraulic telescopic cylinder is controlled by an electric control hydraulic system 5, and the electric control hydraulic system 5 includes a hydraulic working station 501 and an electric control circuit 502. Specifically, the electric control circuit 502 includes a first button 503, a second button 504, a first relay 505, a second relay 506, a first limit switch 507 and a second limit switch 508. The first relay 505 and the second relay 506 are normally open. The first limit switch 507 is connected to a hydraulic telescopic cylinder extension control power supply circuit, and the switch contact of the second limit switch 508 is connected to a hydraulic telescopic cylinder retraction control power supply circuit. The first limit switch 507, the first button 503 and the first relay 505 are electrically connected to form a circuit, thereby forming a hydraulic working station 501 extension control circuit of the hydraulic telescopic cylinder. The second limit switch 508, the second button 504 and the second relay 506 are electrically connected to form a circuit, thereby forming a hydraulic working station 501 retraction control circuit of the hydraulic telescopic cylinder. The first limit switch 507 and the second limit switch 508 are normally closed and arranged on the movement path of the extrusion support 201, and can be disconnected when the extrusion support 201 is touched, thereby realizing the control of the farthest extension and the closest retraction of the hydraulic telescopic cylinder through the touch of the extrusion support 201.

[0034] When braking, the driver presses the second button 504 to drive the contact, the second relay 506 is powered on, the hydraulic station 501 works and starts to supply oil to the retracting port of the double-acting oil cylinder, the output end of the telescopic assembly 2 moves downward to the lower limit position, the extrusion holder 201 is driven to run downward, the brake assembly 3 and the brake force adjusting assembly 4 move downward at the same time, the connecting plate 301 of the brake assembly 3 is lowered on the upper end surface of the rail 6 first, ensuring that the brake block 304 is accurately aligned with the side surface of the rail, under the extrusion of the extrusion slope 203 and the extrusion sleeve 305, the upper end of the brake beam 302 moves inward from the outer lower end, so that the two brake blocks 304 clamp the upper part of the rail 6 tightly, the elastic force of the brake force adjusting assembly 4 is adjusted, at this time, the brake block 304 generates frictional resistance with the upper side surface of the rail, the resistance is transmitted to the brake box 1 through the connecting plate 301, and the movement of the portal crane on the rail 6 is affected by the resistance to produce the effect of preventing strong wind.

[0035] When the portal crane needs to work and remove the brake, the driver presses the first button 503, the first relay 505 is powered on, the hydraulic station 501 starts to work and supply oil to the extending port of the double-acting oil cylinder, the telescopic assembly 2 drives the extrusion holder 201 to rise, so that the extrusion sleeve 305 slides into the extrusion groove 202 from the extrusion slope 203, the extrusion of the extrusion slope 203 is removed, the upper end of the brake beam 302 moves outward from the inner lower end, so that the two brake blocks 304 loosen the upper part of the rail 6, the brake assembly 3 is released, and then the telescopic assembly 2 continues to rise, the extrusion holder 201 lifts the brake force adjusting assembly 4 and the brake assembly 3 until the lower part of the brake assembly 3 is completely lifted into the brake box 1, and the brake is removed.

[0036] The above description is a detailed description of the preferred embodiment of the application, but the embodiment is not used to limit the scope of the patent application of the application, and any equivalent changes or modifications made under the technical spirit of the application should belong to the patent scope covered by the application.

Claims

1. A two-stage force-up wind-resistant brake for a rail portal crane, characterized in that: The utility model provides a kind of brake device, including brake box, drive assembly, brake assembly and brake force adjusting assembly;The cavity with upper and lower openings is provided in the brake box, the drive assembly is installed on the brake box, the output end of the drive assembly can move along vertical direction relative to brake box, the output end of the drive assembly is provided with extrusion holder, the opposite sides of the extrusion holder are provided with symmetrically arranged extrusion groove, and extrusion slope is provided in extrusion groove;The brake assembly includes connecting plate and two groups of brake structures, the connecting plate is slidably arranged in the cavity;Two groups of brake structures are symmetrically arranged about the connecting plate;The brake structure includes brake beam, adjusting beam and brake block, the middle part of brake beam is rotatably connected with the connecting plate, the lower end of adjusting beam can be clamped in the extrusion groove, the middle part of adjusting beam is rotatably connected with the upper end of brake beam, and brake block is hingedly connected with the lower part of brake beam;The upper part of brake block is provided with clamping part, and the two clamping parts of two brake blocks form clamping cavity that can be clamped on the upper part of track;Brake force adjusting assembly is connected with the upper end of two adjusting beams, and brake force adjusting assembly adjusts the pressure of the upper end of two adjusting beams;The extrusion groove is outwardly open, and the upper side wall of the extrusion groove is inclined to form the extrusion slope, the lower end of adjusting beam is provided with rotatable extrusion shaft sleeve, the extrusion shaft sleeve can be clamped in the extrusion groove and can be extruded with the extrusion slope;The outer side of brake beam is provided with limit plate, the limit plate is located above the opening of the cavity, and the output end of the drive assembly is located at the lowermost position, the limit plate is connected with the edge of the opening of the cavity.

2. A two-stage force-up wind brake for a rail portal crane according to claim 1, characterized in that: The brake assembly further includes a return spring, one end of the return spring is fixedly connected with the upper part of one brake beam, the other end of the return spring is fixedly connected with the upper part of the other brake beam, and the return spring has a tensioning force that allows the two brake beams to approach each other.

3. The two-stage force-up wind brake for rail-mounted gantry crane according to claim 1, characterized in that: The upper part of the brake block is provided with a positioning edge bar hingedly connected with the upper part of the brake block, the brake beam is provided with a movable cavity, the other end of the positioning edge bar is located in the movable cavity and is fixedly connected with the brake beam, a positioning spring is sleeved on the positioning edge bar, one end of the positioning spring is connected with the brake block, and the other end of the positioning spring is connected with the brake beam, and the positioning spring has a tensioning force.

4. The two-stage force-up wind brake for rail-mounted gantry crane according to claim 1, characterized in that: The brake force adjusting assembly includes a bolt sleeve rod, an adjusting shaft, a spring pull rod, a positioning shaft, a brake spring, a pair of spring seat plates and a pre-tightening pressure sleeve, one end of the bolt sleeve rod is connected with the upper end of one adjusting beam through the adjusting shaft, the other end of the bolt sleeve rod is provided with a sliding cavity, one end of the spring pull rod is connected with the upper end of the other adjusting beam through the positioning shaft, and the other end of the spring pull rod is slidably arranged in the sliding cavity, the pre-tightening pressure sleeve, the spring seat plates, the brake spring and the other spring seat plate are sequentially sleeved on the spring pull rod, the brake spring is compressed by the two spring seat plates and has a spring force, and one end surface of the spring seat plate close to the bolt sleeve rod is fixedly connected with the bolt sleeve rod.

5. A two-stage force-up wind brake for a rail-mounted gantry crane according to claim 4, characterized in that: The side of the bolt sleeve rod is provided with an observation port communicated with the sliding cavity, and the outer edge of the observation port is provided with a scale line arranged along the axial direction of the bolt sleeve rod.

6. A two-stage force-up wind brake for a rail-mounted gantry crane according to claim 4, characterized in that: The upper part of the adjusting beam is provided with a rotating shaft, and a through hole arranged in a radial direction is arranged on the rotating shaft.

7. The two-stage wind force preventing brake for rail-mounted gantry crane according to claim 1, characterized in that: The driving assembly is a hydraulic telescopic cylinder, and the hydraulic telescopic cylinder is controlled through an electric control hydraulic system.

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