Electric windproof iron wedge device for port tire crane gantry crane

Abstract

The invention belongs to the technical field of port tire crane portal cranes, and discloses an electric windproof iron wedge device for a port tire crane portal crane, which comprises a connecting structure of an electric windproof iron wedge and a tire crane portal crane, a power source, a driving main shaft, a middle conversion device, a profiling linkage plate, a rack, a profiling mechanism and a head mechanism. The power source is of a special design structure, the interior of the power source is of a worm and gear speed reduction structure, and a two-stage motor is used for driving a worm and gear speed reducer to rotate. The driving main shaft and the middle conversion device are fixed through a tile-shaped hoop, the middle conversion device is of a two-piece structure, and under the condition that the middle conversion device is connected with a special hinge pin of the linkage mechanism and matched with a profiling linkage plate, front-back micro-motion adjustment can be achieved under the condition that a power source is locked. The profiling linkage plate adopts a special profiling surface design form, and front-back micro motion can be realized by hinging a special groove. And the profiling mechanism adopts a profiling roller form and can be adjusted front and back.

Description

Technical Field

[0001] This invention belongs to, but is not limited to, the technical field of port tire-mounted gantry cranes, and particularly relates to an electric windproof iron wedge device for port tire-mounted gantry cranes. Background Technology

[0002] With economic development and the continuous increase in foreign trade, ports, as important transportation hubs for foreign trade, are seeing a year-on-year increase in the number of newly added port cranes, and consequently, a significant increase in the number of tire-mounted gantry cranes. A major problem with existing tire-mounted gantry cranes is that coastal docks experience strong winds, especially during typhoons. When the equipment is not in operation, the wind can cause the tires to roll and move, leading to accidents. Existing measures, including tire brakes and fixed anchor chains, cannot completely prevent such accidents.

[0003] A similar publicly disclosed patent is CN113307148B — A hydraulic bidirectional automatic windproof wedge. This patent discloses a structure that uses a hydraulic actuator, a lever mechanism, a wedge block, and a wedge top spring to achieve windproof locking. ([Google Patent][1]) In normal walking mode, the hydraulic actuator raises the wedge block; in the stopped state, the wedge block falls to the contact position with the walking wheel under the action of the top spring; when a gust of wind occurs, the walking wheel is blown against the inclined surface of the wedge block, and the entire machine is wedge-locked by the wheel pressure and friction.

[0004] 1. It mainly relies on the iron wedge top spring to push the wedge block towards the traveling wheel, which makes the windproof locking ability affected by the spring force and the aging state of the spring; if the spring fails due to fatigue or its stiffness is weakened, the locking effect may not be guaranteed.

[0005] 2. Although the solution proposes the concept of "two-way automatic", it does not provide sufficient explanation on the actual wind protection direction switching, fine-tuning alignment, structural rigidity and locking accuracy; especially in the case of headwind or wheel misalignment, it may be difficult to achieve precise fit and reliable locking, and there is a risk of missing lock or wear.

[0006] A similar disclosure is US 8322687 B2 (Integrated Wedge Lock Arrangement), which discloses a hydraulic wedge lock system for telescopic structures, which uses a sliding wedge to engage with a corresponding ramp for locking / releasing control.

[0007] The technical scheme can realize mechanical locking between the telescopic members, but still has the following main problems in the strong wind locking environment of the port rubber-tyred gantry crane: one is that the scheme uses a hydraulic drive and spring pre-tightening mode, and there is a risk of rebound or locking loss under strong wind or reverse impact load; two is that the structure does not consider the adaptation to ground height error, installation deviation and slope difference, and lacks the micro-adjustment capability in the locked state, so that it is difficult to ensure the precise fitting and long-term stable locking of the wedge in the complex operation environment. SUMMARY

[0008] In view of the problems in the prior art, the application provides an electric windproof iron wedge device for a port rubber-tyred gantry crane.

[0009] The application is implemented as follows: an electric windproof iron wedge device for a port rubber-tyred gantry crane, characterized in that the device comprises an electric windproof iron wedge and a connecting structure of the rubber-tyred gantry crane, a power source, a driving main shaft, an intermediate conversion device, a profiling linkage plate, a rack, a profiling mechanism and a head mechanism.

[0010] Further, the connecting structure of the electric windproof iron wedge and the rubber-tyred gantry crane, a fixed support and a crane are connected; a limiting connection frame is designed in a frame type, an inner frame plays a role of positioning and limiting, and is fixed with the fixed support after position adjustment; the electric iron wedge body is inserted into the limiting connection frame, and is fixed around the limiting connection frame in a gap fit, and is adjusted up and down by a fixed adjusting screw after position fixation.

[0011] Further, the power source is provided with single self-locking, and is designed in a special structure, and is internally provided with a worm and gear speed reduction structure, and is driven to rotate by a double-stage motor channel; the motor is specially designed, has an IP67 level, and has a temporary manual driving function; after reverse passive stress, the structure has a one-way stress characteristic, and has a self-locking function.

[0012] Further, one end of the driving main shaft is connected with the power source; the outer side of the driving shaft is connected with the rack in a shaft sleeve fixed manner, and can rotate on the rack; the middle part of the driving shaft is connected with the intermediate conversion device in a waisted hoop structure.

[0013] Further, the intermediate conversion device has front and rear and upper and lower locking states, and is provided with two pieces, one side of which is fixed with the driving main shaft in a waisted hoop structure, and the other side of which is connected with the profiling linkage plate; the profiling linkage plate is connected with the intermediate conversion device in a hinged pin connection manner, and the waist hole structure on the profiling fixing plate is designed to realize front and rear micro-adjustment under the locking of the power source.

[0014] Further, the profiling linkage plate and the intermediate conversion device are connected by pin joints; and the profiling mechanism is matched; the profiling surface is specially set; and the hinged connection special groove can realize the front and rear micro-motion.

[0015] Further, the rack is used for fixing the whole mechanism.

[0016] Further, the profiling mechanism is in the form of a profiling roller, and special high-molecular-weight polyethylene material is used; the profiling mechanism and the profiling surface are matched, and have the front and rear adjustment function.

[0017] Further, the head mechanism and the profiling linkage plate are connected by hinged connection, and have the buffering function, and the tire is contacted by the tire lifting tire to realize the final locking function.

[0018] Further, the device has the following working steps:

[0019] S1: after the tire lifting crane stops working, the power source is started to work;

[0020] S2: the power source drives the driving main shaft to rotate;

[0021] S3: the driving main shaft drives the intermediate conversion device to work;

[0022] S4: the intermediate conversion device drives the profiling linkage plate to work;

[0023] S5: the profiling linkage plate and the profiling mechanism keep contact and match;

[0024] S6: the profiling linkage plate drives the head mechanism to work;

[0025] In special working conditions, when the equipment moves greatly, the working steps are as follows:

[0026] S: the tire reversely moves to drive the head mechanism to move backward within 50mm;

[0027] S2: the head mechanism movement is conducted to the profiling mechanism to move backward;

[0028] S3: the profiling mechanism moves locally through the special hinged mechanism on the intermediate conversion device, and is freely floated within 50mm.

[0029] In combination with the above technical scheme and the technical problems solved, the technical scheme to be protected by the application has the following advantages and positive effects:

[0030] The application realizes a compact structure, simple installation, stable mechanical transmission and a windproof locking system by the integrated design of the electric windproof iron wedge and the tire crane door type crane connection structure. The frame type combination structure of the limiting connection frame and the fixed support enables the electric iron wedge to accurately slide within a limited range and be finely adjusted through the up-down adjusting screw, thereby ensuring the fitting degree of the wedge body with the ground or the track groove. The structure not only improves the assembly precision and adaptability, but also avoids the positioning deviation problem of the traditional manual wedge insertion.

[0031] The worm gear reduction power source adopted by the application has self-locking performance and IP67 protection level, and can stably operate in a humid, dusty and high wind pressure environment. After the motor output torque is transmitted to the driving main shaft through the reduction system, a reliable one-way locking effect is formed, and even under the action of strong wind impact or vibration, the position of the iron wedge will not rebound or loosen, thereby significantly improving the safety redundancy and long-term stability of the windproof system.

[0032] Through the wa-shaped hoop structure of the intermediate conversion device, efficient torque transmission and motion compensation between the driving main shaft and the profiling linkage plate are realized. The structure can absorb the small angular deviation caused by assembly error and structural deformation while ensuring rigid connection, thereby maintaining the synchronization and mechanical smoothness of the system. This connection form effectively reduces the stress concentration in the transmission chain due to vibration or unbalanced load, thereby prolonging the service life of the whole machine.

[0033] In addition, the hinged structure of the profiling linkage plate matched with the waist hole track design enables the windproof iron wedge to still realize micro-adjustment and flexible fitting in the power locking state. This design not only improves the sealing performance and anti-sliding performance of the iron wedge in contact with the ground, but also adapts to different terrain heights and equipment posture errors, thereby ensuring the accuracy and repeatability of the locking action, and improving the adaptability of the device in complex operating environments.

[0034] The electric windproof iron wedge device has the advantages of high automation degree, safe and reliable locking, strong structure adjustability and convenient maintenance. Compared with the traditional manual windproof wedge, the scheme significantly improves the operation efficiency, windproof stability and man-machine safety, thereby providing a powerful guarantee for the safe operation of the port tire crane door type crane under extreme weather conditions such as typhoon. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is the overall structure diagram of the electric windproof iron wedge device for the port tire crane door type crane provided by the embodiment of the application-1;

[0036] Figure 2 is the overall structure diagram of the electric windproof iron wedge device for the port tire crane door type crane provided by the embodiment of the application-2;

[0037] Figure 3Is the connecting structure diagram of the electric windproof iron wedge and the tire portal crane provided by the embodiment of the application;

[0038] Figure 4 Is the power source structure diagram provided by the embodiment of the application;

[0039] Figure 5 Is the driving main shaft structure diagram provided by the embodiment of the application;

[0040] Figure 6 Is the tile-shaped hoop structure provided by the embodiment of the application;

[0041] Figure 7 Is the intermediate conversion device structure diagram provided by the embodiment of the application;

[0042] Figure 8 Is the hinge point detail of the intermediate conversion device provided by the embodiment of the application;

[0043] Figure 9 Is the profiling linkage plate structure diagram provided by the embodiment of the application;

[0044] Figure 10 Is the rack structure diagram provided by the embodiment of the application;

[0045] Figure 11 Is the profiling mechanism structure diagram provided by the embodiment of the application;

[0046] Figure 12 Is the head mechanism structure diagram provided by the embodiment of the application;

[0047] In the figure: 1, simulate the tire and fixed structure of the tire portal crane; 2, the connecting structure of the electric windproof iron wedge and the tire portal crane; 3, power source; 4, driving main shaft; 5, intermediate conversion device; 6, profiling linkage plate; 7, rack; 8, profiling mechanism; 9, head mechanism; 10, fixed support; 11, limit connection frame; 12, electric iron wedge mechanism body; 13, fixed adjusting screw; 14, tile-shaped hoop structure; 15, specially set profiling surface; 16, profiling drive roller; 17, front and rear adjusting device; 18, hinge point; 19, buffer; 20, tire. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the application more clear and obvious, the application will be further described in detail below in combination with embodiments. It should be understood that the specific embodiments described here are only used to explain the application, and are not used to limit the application.

[0049] As Figure 1 , Figure 2As shown, an embodiment of the present invention provides an electric windproof wedge device for a port tire-mounted gantry crane. The device includes: an electric windproof wedge and a connection structure for the tire-mounted gantry crane 2, a power source 3, a drive spindle 4, an intermediate conversion device 5, a contour linkage plate 6, a frame 7, a contour mechanism 8, and a head mechanism 9.

[0050] Figure 1 In the simulation, the tires and fixed structure of the tire-mounted gantry crane are sized to simulate the tire dimensions of existing equipment.

[0051] The connection structure 2 between the electric windproof wedge and the tire-mounted gantry crane is as follows: Figure 3 As shown, the fixed bracket 10 is connected to the crane; the limiting connection frame 11 adopts a frame design, and the inner section plays a positioning and limiting role. After the position is adjusted, it is fixed to the fixed bracket 10; the electric iron wedge body 12 is inserted into the limiting connection frame 11, and the four sides are fixed with the limiting connection frame 11 by clearance fit. After the position is fixed, the upper and lower parts are adjusted by the fixing adjustment screw 13.

[0052] like Figure 4 As shown, the power source 3, equipped with unidirectional self-locking, adopts a specially designed structure with an internal worm gear reduction mechanism. It utilizes a two-stage motor channel to drive the worm gear reducer. The motor features a special design with an IP67 rating and also provides temporary manual drive functionality. Under reverse passive force, it utilizes the unidirectional force-bearing characteristic of the structure to achieve a self-locking function.

[0053] like Figure 5 As shown, one end of the drive shaft 4 is connected to the power source 3; the outer side of the drive shaft is connected to the frame 7 and fixed by a bushing, allowing the drive shaft to rotate on the frame; the middle part of the drive shaft is connected to the intermediate conversion device 5 and fixed by a tile-shaped clamp structure 14, as shown in the figure. Figure 6 As shown.

[0054] like Figure 7 As shown, the intermediate conversion device 5 has front-to-back and top-to-bottom locking states. The intermediate conversion device consists of two pieces; one side is fixed to the drive spindle 4 using a tile-shaped clamp structure, and the other side is connected to the contour linkage plate 6. The connection to the contour linkage plate 6 is via a hinge pin. Utilizing the track-designed waist-hole structure on the contour fixing plate, it enables micro-adjustment of the front and back even when the power source 3 is locked. Details of the hinge joint of the intermediate conversion device are shown below. Figure 8 As shown.

[0055] like Figure 9 As shown, the contouring linkage plate 6 and the intermediate conversion device 5 are connected by a pin hinge; and cooperate with the contouring mechanism 8; the contouring surface is specially designed with a contouring surface 15; the hinged connection with a special groove can realize back and forth micro-movement.

[0056] like Figure 10As shown, the frame 7 is used to fix the entire mechanism.

[0057] like Figure 11 As shown, the contouring mechanism 8 and the contouring surface 6 cooperate to provide front-to-back adjustment. It is in the form of contouring rollers and is made of a special high-molecular-weight polyethylene material.

[0058] like Figure 12 As shown, the head mechanism 9 and the contour linkage plate 6 are hinged together, and have a buffer function. They also contact the tire of the tire crane to achieve the final locking function.

[0059] The overall structure of the device is as follows: Figure 1 and Figure 2 As shown, the electric windproof wedge device is installed in the bottom support area of ​​the tire-mounted gantry crane and fixed to the base plate of the fixed structure 1 via the connecting structure 2. The main body of the device includes a frame 7, a power source 3, a drive shaft 4, an intermediate conversion device 5, a contour linkage plate 6, a contour mechanism 8, and a head mechanism 9. The components are connected by hinges, linkages, and limit connections to form a complete mechanical closed loop. The electric windproof wedge is connected to the bottom beam of the crane via a fixed bracket 10. The limit connection frame 11 limits the position of the wedge body 12, and the fixed adjusting screw 13 enables fine-tuning up and down, so that the wedge can accurately press against the ground or windproof track when closed.

[0060] In the power transmission section, power source 3 adopts a worm gear reducer motor structure with one-way self-locking function, such as... Figure 4 and Figure 5 As shown, its output end drives the intermediate conversion device 5 to rotate via the drive spindle 4. The drive spindle 4 is installed on the frame 7 through a bushing, allowing it to rotate smoothly on the frame. The intermediate conversion device 5 is fixed to the spindle using a wedge-shaped clamp structure 14, with one side connected to the spindle and the other side connected to the contouring linkage plate 6 via a pin. When the power source drives in the forward direction, the output torque of the worm gear reducer is transmitted to the intermediate conversion device 5 via the drive spindle 4, thereby driving the contouring linkage plate 6 and its downstream contouring mechanism 8 and head mechanism 9 to move in coordination.

[0061] like Figure 6 and Figure 7 As shown, the intermediate conversion device 5 can lock and fine-tune in the front-back and up-down directions. Its hinged structure with the contouring linkage plate 6 utilizes the principle of waist hole sliding, allowing for limited front-back position compensation under dynamic locking conditions. The rear end of the contouring linkage plate 6 contacts the contouring mechanism 8, and the front end is connected to the head mechanism 9 via a pin. The contouring mechanism 8 consists of contouring rollers and a high-molecular-weight polyethylene sliding surface, capable of rolling along the trajectory of the contouring surface 15 to adapt to different ground heights or slight inclination angles of the tire crane, thereby achieving automatic alignment and smooth contact during the lowering and locking process of the iron wedge.

[0062] like Figures 9 to 12As shown, when the motor starts, the power source 3 drives the driving main shaft 4 to rotate, and through the intermediate conversion device 5, the rotary motion is converted into the linear swing of the profiling linkage plate 6, and then the head mechanism 9 is driven to descend. The head mechanism 9 is hingedly connected with the profiling linkage plate 6, and is provided with a buffer mechanism, so that the iron wedge head can absorb the impact force when contacting with the ground or the tire, and realize flexible locking. After locking is completed, the self-locking characteristic of the worm gear deceleration mechanism can make the system still maintain the locked posture in the power-off state, effectively prevent the displacement and overturning risk of the crane caused by the typhoon or strong wind. The whole system cooperates through limiting, linkage and self-locking, and ensures the safety and stability of the port tire crane in extreme weather.

[0063] The embodiment of the present application provides an electric windproof iron wedge device for a port tire crane gantry crane, and the overall working steps are as follows:

[0064] S1: after the tire crane stops working, the power source 3 is started to work;

[0065] S2: the power source 3 drives the driving main shaft 4 to rotate;

[0066] S3: the driving main shaft 4 drives the intermediate conversion device 5 to work;

[0067] S4: the intermediate conversion device 5 drives the profiling linkage plate 6 to work;

[0068] S5: the profiling linkage plate 6 and the profiling mechanism 8 keep contact and cooperation;

[0069] S6: the profiling linkage plate 6 drives the head mechanism 9 to work.

[0070] In special working conditions, when the equipment moves greatly, the working steps are as follows:

[0071] S1: the tire reversely moves to drive the head mechanism 9 to move backward within 50mm;

[0072] S2: the movement of the head mechanism 9 is conducted to the backward movement of the profiling mechanism 6;

[0073] S3: the profiling mechanism 6 keeps free floating within 50mm through the partial movement of the special hinged mechanism on the intermediate conversion device 5.

[0074] The electric windproof iron wedge device of the application automatically starts the windproof locking program after the port tire crane portal crane stops working. First, in step S1, when the crane stops running and issues a locking instruction, the power source starts to work. The power source is a worm gear and worm reduction motor with one-way self-locking function, which converts the high-speed motor speed into low-speed high-torque output through the internal double-stage reduction structure, and outputs stable driving torque through the shaft coupling. Because the worm gear transmission has one-way self-locking characteristics, the system can maintain the original position when the output torque stops, preventing external wind or vibration from causing rotation or loosening.

[0075] In step S2, the torque output by the power source is transmitted to the intermediate conversion device through the driving main shaft. The driving main shaft is made of high-strength alloy steel, and is supported and installed on the rack through shaft sleeves at both ends, which can maintain high stability in the axial direction while realizing smooth rotation. When the power source starts, the driving main shaft generates rotational motion, and the torque is efficiently transmitted to the intermediate conversion device. The middle part of the main shaft and the intermediate conversion device are fixed by a waisted hoop structure, which has good rigidity and shock resistance during torque transmission, while allowing small angle compensation to adapt to assembly errors.

[0076] In step S3, the intermediate conversion device converts the rotational motion of the driving main shaft into a composite swinging motion. The device is composed of two symmetrical crank-type side plates, one side of which is fixed with the main shaft, and the other side is connected with the profiling linkage plate through pin shaft hinged connection. The intermediate conversion device realizes the fine adjustment function of the motion stroke through the built-in arc waist hole track structure, so that the profiling linkage plate can realize small range compensation in the front and rear directions during the iron wedge locking or releasing process, thereby ensuring the smoothness and reliability of the contact angle between the iron wedge and the ground.

[0077] In step S4, the profiling linkage plate produces synchronous swinging under the driving of the intermediate conversion device. The profiling linkage plate is a high-strength steel plate structure, one end of which is hinged with the intermediate conversion device, and the other end is connected with the profiling mechanism and the head mechanism. When the intermediate conversion device outputs swinging, the profiling linkage plate pushes the head mechanism downward along the designed trajectory, so that the windproof iron wedge is gradually inserted into the ground wedge groove. During this process, the profiling linkage plate and the profiling mechanism maintain rolling contact, which can automatically adjust the motion angle according to the unevenness of the ground, ensuring the smooth downward movement of the wedge body and realizing uniform stress.

[0078] In steps S5 and S6, the profiling mechanism and the profiling surface are in continuous contact, and the profiling roller rolls along the optimized curved surface to absorb the displacement error caused by the slope of the ground, the height difference or the change of the tire attitude, and maintain the smoothness of the iron wedge descending trajectory. Finally, the head mechanism completes the locking action under the pushing of the profiling linkage plate. The head is provided with an elastic buffer assembly inside, when the iron wedge head contacts with the ground or the track, the spring and the rubber pad are compressed to store energy and slowly release, so that the iron wedge forms a flexible fit with the ground, realizes stable windproof positioning, and reduces mechanical impact.

[0079] In special working conditions, such as when the tyre crane moves slightly due to inertia or external disturbance, the system enters an adaptive floating mode. At this time, the displacement of the head mechanism due to the movement of the tyre is within 50 mm, and the movement is transmitted to the profiling linkage plate and the intermediate conversion device. Since the waist hole sliding mechanism of the intermediate conversion device has the characteristics of free floating, it can compensate for passive displacement within a small range in the locked state, so that the iron wedge absorbs the movement of the equipment without unlocking. This mechanism effectively prevents structural stress concentration or wedge jamming caused by vehicle micro-motion, ensuring long-term stable and safe operation of the device in complex port working conditions.

[0080] In the embodiment of the present application, the electric windproof iron wedge device realizes the automatic windproof positioning function of the port tyre crane gantry crane through a series of linkages and transmission components.

[0081] Firstly, the connecting structure 2 is used to fix the entire electric windproof iron wedge to the main beam or column part of the crane, which is composed of a fixed support 10, a limiting connection frame 11 and an adjusting screw 13. The fixed support 10 is a force-bearing basis and is welded or bolted to the crane structure. The limiting connection frame 11 adopts a frame structure, and the electric iron wedge body 12 can slide up and down in the frame, and the gap around ensures the accuracy of guidance. The fixed adjusting screw 13 at both ends is used to fine-tune the contact depth of the wedge body with the ground, realizing accurate locking for different terrains and gaps.

[0082] Secondly, the power source 3 adopts an IP67 grade worm gear motor, as shown in Figure 4 . The motor is started by an electric control signal, and the double-stage worm gear reduction structure reduces the motor speed and increases the output torque, which drives the main shaft 4 to rotate through the shaft coupling. Since the worm gear mechanism has the characteristics of one-way self-locking, when the external wind load or vibration generates a reverse torque, the driving system can automatically remain in the locked state to prevent the windproof iron wedge from loosening due to vibration and ensure the safety and reliability of windproof.

[0083] Thirdly, the driving main shaft 4 and the intermediate conversion device 5 are stably connected through the wa-shaped clamp structure 14, which can transmit torque while allowing a certain amount of angular compensation, as shown in Figure 6 . The driving main shaft 4 is installed on the inside of the rack 7 and is supported by a shaft sleeve to ensure its rotation accuracy and load stability. When the power source 3 is started, the main shaft 4 rotates in a fixed direction, and the intermediate conversion device 5 converts the rotary motion into a composite swing output and realizes motion synchronization with the profiling linkage plate 6 through the hinge pin.

[0084] Finally, the profile linkage plate 6 and the profile mechanism 8 complete the insertion and removal of the windproof iron wedge. One end of the profile linkage plate 6 is connected to the intermediate conversion device 5 through a waist hole structure, and can still be adjusted forward and backward in a small range in the state of power locking, so as to adapt to the relative displacement error of different crane tires and the ground. The other end of the linkage plate is connected to the head mechanism 9 through the profile mechanism 8, drives the electric iron wedge 12 to insert or separate from the ground wedge groove 15 along the guide path, and realizes the windproof positioning and release operation. The whole system is driven by precise mechanical cooperation and controlled driving, and constitutes an electric windproof execution device which can be self-locking, anti-loose and adjustable, which significantly improves the wind resistance safety and automation level of the port rubber-tyred gantry crane.

[0085] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any modification, equivalent replacement and improvement within the technical range disclosed by the present application and within the spirit and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electric windproof wedge device for a port tire-mounted gantry crane, characterized in that, The device includes a fixed structure, a connecting structure, a power source, a drive spindle, an intermediate conversion device, a contour linkage plate, a frame, a contour mechanism, and a head mechanism. The connecting structure is used to fix the device to the bottom beam of the crane and to limit the movement path of the electric windproof wedge body through the limiting connecting frame; The power source drives the intermediate conversion device to output torque via the main shaft, causing the contour linkage plate to swing through the contour mechanism and the head mechanism to realize the insertion and withdrawal of the iron wedge, thereby forming a ground windproof lock when the crane is stationary.

2. The electric windproof wedge device as described in claim 1, characterized in that, The limiting connection frame is a rectangular frame structure, with an internal clearance fit space that matches the iron wedge body. Fixed adjustment screws are set at the upper and lower ends respectively to finely adjust the contact height between the iron wedge and the ground or track surface to achieve precise fit.

3. A power transmission structure for an electric windproof iron wedge device, characterized in that, The power source is a worm gear reducer motor with a one-way self-locking function; The motor output is connected to the main shaft via a coupling to achieve unidirectional torque transmission; When outputting in the forward direction, the worm drives the worm wheel to generate torque and rotate the main shaft; when the external load generates a reverse force, the worm wheel cannot reverse due to its self-locking effect, thus maintaining the locked state of the iron wedge.

4. The power transmission structure as described in claim 3, characterized in that, The worm gear reducer motor is a two-stage reduction type, with the first stage transmission ratio less than 5 and the second stage transmission ratio greater than 10, in order to obtain low-speed high-torque output; the motor housing protection level is not lower than IP67, and a manual drive interface is provided for manual unlocking under power failure conditions.

5. A main shaft drive and intermediate conversion structure for an electric windproof iron wedge device, characterized in that, The drive spindle is mounted in the frame via a bushing and can rotate freely relative to the frame; The middle section of the main spindle is fixedly connected to the intermediate conversion device, which consists of two symmetrical plates. One side is connected to the main spindle, and the other side is connected to the contour linkage plate through a pin. The intermediate conversion device is equipped with a waist hole sliding structure to achieve micro-motion compensation in the front and rear directions, so as to achieve position adjustment in the power lock state.

6. The spindle drive and intermediate conversion structure as described in claim 5, characterized in that, The sliding trajectory of the waist hole is an arc-shaped path with a radius of curvature of not less than 50 mm. The contour linkage plate can generate a micro-motion stroke within a range of ±3 mm in the locked state to compensate for installation errors and structural deformation.

7. A contour-following linkage mechanism for an electric windproof iron wedge device, characterized in that, The contouring linkage plate and the intermediate conversion device are hinged by a pin, with the front end connected to the head mechanism and the rear end cooperating with the contouring mechanism. The contouring mechanism includes rollers and a contouring surface. The rollers roll along the contouring surface to automatically adapt to different ground slopes or heights during the descent of the wedge.

8. The contour-following linkage mechanism as described in claim 7, characterized in that, The contouring surface is a curved structure with optimized trajectory, a forward tilt angle of 5 to 10 degrees, and an outer diameter of the contouring roller of not less than 80 mm. It is connected to the contouring linkage plate through an elastic support to reduce friction and improve the fit stability.

9. A head buffer and locking structure for an electric windproof iron wedge device, characterized in that, The head mechanism is hinged to the contour linkage plate via a pin, and an elastic buffer component is installed inside. When the wedge head contacts the ground or tire, the elastic component is compressed to store energy and then slowly released, achieving flexible fit and stable locking.

10. The head buffer and locking structure as described in claim 9, characterized in that, The elastic buffer assembly consists of a spring and a rubber pad. The spring stiffness is 20 to 50 Newtons per millimeter, and the rubber pad hardness is Shore A60 to A70. It is used to disperse impact loads and improve vibration resistance.

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