Remote control type gantry crane capable of monitoring tension

Abstract

The invention relates to the technical field of remote control type cranes, and discloses a remote control type gantry crane capable of monitoring tension, which comprises a portal frame, the top of the portal frame is provided with a cross beam, the bottom of the portal frame is symmetrically provided with wheel seats, and the interiors of the wheel seats are downwards provided with wheel bottom grooves; and two groups of crossing wheel units are symmetrically mounted in each group of wheel bottom grooves, and each crossing wheel unit comprises a driving shaft. According to the remote control type gantry crane capable of monitoring the tension, a square telescopic rod continues to stretch out by a certain distance, a pressing head on a triangular clamping block makes contact with an arc groove, an annular guide base is pushed to linearly move in a guide groove, a strip-shaped block is lifted in the vertical direction, and three sets of guide columns move outwards correspondingly; the curved stop block is driven to be in contact with the anti-rotation clamping grooves in the wheel shafts, so that the clamping teeth are randomly inserted into the anti-rotation clamping grooves to lock the wheel shafts, the horizontal stability of the whole crane is improved in cooperation with the anti-rotation clamping grooves, and displacement of the crane during cargo loading and unloading is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of remote-controlled cranes, and in particular to a remote-controlled gantry crane capable of monitoring tension. Background Art

[0002] As container ships become larger, container cranes are also developing towards high efficiency. Container gantry cranes, also known as portal cranes, are a type of lifting equipment commonly used in ports, inland terminals, and container yards. They are suitable for large port items such as containers and cargo boxes. Gantry cranes are a type of bridge crane, and their structure is similar to a door-shaped frame. The current container gantry cranes used in ports and terminals have a fixed structure because their cantilever beams and main beams have a cantilever beam that extends the traveling distance of the lifting trolley to the shore to facilitate the loading and unloading of ships and cargo.

[0003] Existing gantry cranes have many technical defects when in use. First, the driving cab and the lifting control room are both set on the crane, which adds extra burden to the crane, resulting in a complex structure and low degree of automation; second, the current crane relies on a moving wheel set to move, but when encountering obstacles or steps during the walking process, the crane cannot continue to move and needs to take a detour or turn back, with poor flexibility; third, when the crane is loading and unloading containers, the lower plate must be stable enough, otherwise displacement will occur. At present, there is a lack of effective ways to support the crane except for retracting the moving wheels to increase the support stability; fourth, the lifting equipment on the crane is connected by hooks and rings, and the two are highly mobile, and decoupling may occur, resulting in accidental partial detachment of the container, posing a safety hazard.

[0004] In summary, considering that the existing facilities cannot meet the work requirements, we propose a remote-controlled gantry crane that can monitor tension. Summary of the invention

[0005] The main purpose of the present invention is to provide a remote-controlled gantry crane capable of monitoring tension, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A remote-controlled gantry crane capable of monitoring tension comprises a gantry, a crossbeam is arranged on the top of the gantry, wheel seats are symmetrically installed on the bottom of the gantry, wheel bottom grooves are downwardly opened inside the wheel seats, and each group of the wheel bottom grooves is symmetrically installed with two groups of crossing wheel units.

[0008] As a preferred solution of the tension-monitoring remotely-controlled gantry crane described in the present invention, the crossing wheel unit includes a driving shaft, which is fixed by two sets of connecting bearings and the inner wall of the wheel bottom groove, and three sets of wheel frames are symmetrically distributed in a ring in the middle position of the driving shaft, and each set of the wheel frames is equipped with a moving wheel, and a part of the moving wheel extends out of the wheel bottom groove during movement.

[0009] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, a triangular slot is provided at the middle position of one end surface of the driving shaft, a stopper is horizontally arranged outside the triangular slot, and the stopper is fixed in the inner layer of the wheel seat.

[0010] As a preferred solution of the tension-monitoring remotely-controlled gantry crane described in the present invention, two groups of hydraulic cylinders are symmetrically installed inside the gantry, a hydraulic rod is downwardly extended inside the hydraulic cylinder, a double-headed support block is welded to the lower end of the hydraulic rod, a storage groove for accommodating the double-headed support block is opened in the inner layer of the wheel seat, and the lower end of the double-headed support block extends out of the storage groove and contacts the ground.

[0011] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, a lifting mechanism is riveted on the lower end surface of the crossbeam, and the lifting mechanism includes a hoisting motor, a reducer and two groups of rope drums. The main steel wire ropes of each group of rope drums extend downward through a guide seat, and the two groups of guide seats are symmetrically installed at the bottom of the lifting mechanism. Two groups of steel wire branch ropes are fixedly connected to the lower end of the main steel wire rope, and a hook is installed on the lower end of each group of steel wire branch ropes.

[0012] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, the four groups of hooks are respectively connected to four groups of lifting rings, and the four groups of lifting rings are movably installed on the top of the container. The four corners of the top of the container are welded with lifting arms for the movement of the lifting rings.

[0013] An electrical control console is arranged on the outside of the gantry, including an electrical control system. The electrical control system realizes system communication through the CAN bus, adopts electro-hydraulic hybrid drive and full electrical signal to control all the actions of the gantry, and all parameters and real-time images of the crane can be observed through the display on the electrical control console.

[0014] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, a short shaft is welded at one end of the driving shaft away from the triangular slot, a large gear is sleeved on the short shaft, a small gear is meshed on one side of the large gear, the small gear is sleeved on the output shaft of the first control motor, the first control motor is horizontally installed in the inner layer of the wheel seat, the large gear and the small gear are both arranged inside the drive housing, and the drive housing is fixed on the outer surface of the wheel seat.

[0015] As a preferred solution of the tension-monitoring remotely-controlled gantry crane described in the present invention, axles are welded at both ends of each group of the moving wheels, and each group of the axles is fixed by a bearing seat and the inner layer of the wheel frame, one group of the axles is externally connected to a moving wheel drive structure, and the moving wheel drive structure is installed on the outer side of the wheel frame, and a plurality of anti-rotation grooves are evenly opened on the surface of the part of the other group of the axles extending out of the wheel frame.

[0016] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, the stopper comprises a telescopic cylinder, a square telescopic rod, a triangular clamping block and a pressure head, the telescopic cylinder is installed through the outer surface of the wheel seat away from the side of the drive housing, the interior of the telescopic cylinder is horizontally extended outward with a square telescopic rod, the end of the square telescopic rod is welded with a triangular clamping block extending into the triangular clamping groove, and the triangular clamping block is welded with a pressure head at the middle position of the end away from the square telescopic rod.

[0017] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, the triangular slot extends toward the inner side of the driving shaft and is connected to a guide slot, an annular guide seat is provided in the guide slot for limiting the position, an arc groove for the pressure head to extend into is provided in the middle position of one end face of the annular guide seat, the end of the annular guide seat away from the arc groove is fixed by connecting a spring and the groove wall of the guide groove, 3 groups of strip grooves are evenly distributed on the annular surface of the annular guide seat, the bottom of each group of the strip grooves is provided with high and low inclined surfaces, and an auxiliary stopper is movably provided in each group of the strip grooves, and the number of the auxiliary stops is 3 groups.

[0018] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, the auxiliary stopper includes a bar block, a section, a guide column, a No. 1 spring, a curved stop block and a latch tooth. The bar block moves in a bar groove. The bottom of the bar block is provided with a section that fits the high and low slopes. The upper end of the bar block is connected to the guide column. The outer surface of the drive shaft is provided with a first receiving groove for the guide column to pass through. A No. 1 spring sleeved on the outside of the guide column is connected between the bar block and the bottom of the first receiving groove. A curved stop block is welded on the upper end of the guide column. A plurality of groups of latch teeth are evenly installed on the upper end surface of the curved stop block. The number of the latch teeth is preferably 10-20 groups. The latch teeth act on the anti-rotation slot.

[0019] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, a side support is riveted at the middle position inside each group of the guide seats, two groups of guide wheels are symmetrically installed at the upper and lower positions of the side supports, a pressure wheel is installed on the side support and between the two groups of guide wheels, the pressure wheel and the two groups of guide wheels both act on the steel wire main rope, a tension sensor is installed on the pressure wheel, and the wire of the tension sensor extends out of the guide seat.

[0020] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, a second receiving groove is provided in the middle position of the inner side surface of the hook, a pressure rod is movably provided in the second receiving groove, a first spring sleeve is provided in the middle of the pressure rod, a No. 2 spring sleeved on the outside of the pressure rod is connected between the first spring sleeve and the bottom of the second receiving groove, the upper end of the pressure rod is in contact with the inner surface of the lifting ring, the lower end of the pressure rod is located in an arc slide, the arc slide is provided inside the hook, a plurality of groups of rolling bodies are sequentially arranged in the arc slide, the number of the rolling bodies is preferably 4-10 groups, adjacent rolling bodies roll with each other, the pressure rod is in contact with the lowest group of rolling bodies, and the highest group of rolling bodies is in contact with the hook anti-slip device.

[0021] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, the hook anti-drop device includes a carrier column, a second spring sleeve, a third spring, a connecting groove, an intermediate roller, an inner bearing, a stretch spring steel sheet, and a slider. A third receiving groove is provided on the upper inner side surface of the hook, a carrier column is horizontally movably arranged in the third receiving groove, a second spring sleeve is sleeved on the middle part of the carrier column, a No. 3 spring sleeved on the outside of the carrier column is connected between the second spring sleeve and the third receiving groove, a part of the carrier column is located in the arc slideway, and acts on a group of rolling bodies at the uppermost end, a connecting groove is provided in the middle position of the end surface of the carrier column extending out of the third receiving groove, an intermediate roller is rotatably arranged in the connecting groove, the end of the intermediate roller is fixed by an inner bearing and the connecting groove, a plurality of groups of stretch spring steel sheets are evenly welded on the outer side surface of the intermediate roller, and the number of the stretch spring steel sheets is preferably 6-12 groups, and a slider is provided on the end of the intermediate roller away from the inner bearing.

[0022] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, one side of the lifting ring is provided with an annular narrow groove, the interior of the annular narrow groove is connected to a limiting track wide groove, the limiting track wide groove is larger than the size of the annular narrow groove, the extension spring steel sheet is flattened and deformed when passing through the annular narrow groove, when the extension spring steel sheet completely passes through the annular narrow groove and enters the limiting track wide groove, the extension spring steel sheet is completely extended back to its original position, the hook anti-dropout device is confined in the limiting track wide groove, a part of the annular narrow groove is provided with a disassembly port connected to the limiting track wide groove, and the hook anti-dropout device is taken out from the disassembly port.

[0023] As a preferred solution of the tension-monitoring remote-controlled gantry crane described in the present invention, a driving motor is arranged in the moving wheel driving structure.

[0024] As a preferred solution of the tension-monitorable remote-controlled gantry crane described in the present invention, the angles between adjacent moving wheels are 120°.

[0025] The present invention provides a remote-controlled gantry crane capable of monitoring tension through improvement, which has the following significant improvements and advantages compared with the prior art:

[0026] (1) When the main wire rope moves in the guide seat, it will contact the pressure wheel and the two sets of guide wheels in turn to achieve the guiding effect and improve the traction stability of the wire rope. At the same time, the main wire rope will cause the pressure wheel to rotate. The relative force between the two can be detected by the tension sensor, so as to calculate the lifting tension of the main wire rope and achieve the purpose of real-time monitoring.

[0027] (2) When the gantry encounters an obstacle or a step during its movement, the first control motor is started through remote control, and the drive shaft is driven to rotate 120° through a series of transmission short shafts. The three sets of moving wheels exchange positions, so that the crossing wheel unit can be flipped over, crossing the obstacle or climbing the steps, thereby improving the flexibility of the crane's movement.

[0028] (3) The telescopic cylinder is started by remote control, and the square telescopic rod extends outward, driving the triangular clamp block to be inserted into the triangular clamp slot, thereby locking the drive shaft and improving the stability of the straddling wheel unit.

[0029] (4) Remote control starts two groups of hydraulic cylinders, and the hydraulic rod extends downward, so that the double-headed support block contacts the ground to achieve a supporting effect. At the same time, the square telescopic rod continues to extend a certain distance, so that the pressure head on the triangular clamping block contacts the arc groove, pushing the annular guide seat to move linearly in the guide groove, causing the strip block to lift in the vertical direction. The three groups of guide columns move outward respectively, driving the curved stop blocks to contact the anti-rotation grooves on each group of wheel axles, so that the clamping teeth are randomly inserted into the anti-rotation grooves, locking the wheel axles to prevent the moving wheels from rotating. Together with the former, the horizontal stability of the entire crane is significantly improved, preventing it from shifting during loading and unloading.

[0030] (5) Relative pressure is generated between the inner side surface of the hook and the inner side surface of the ring, and the pressure rod on the hook is completely pressed into the second receiving groove. The lower end of the pressure rod exerts an extrusion effect on the lowest group of rolling bodies, causing the rolling bodies to roll in the arc-shaped slideway, and each group of rolling bodies moves slightly along the arc-shaped slideway through the continuous mutual force. The uppermost group of rolling bodies exerts an extrusion effect on the carrier column during the movement, and the carrier column moves linearly outward. The stretch spring steel sheet in the unfolded and tilted state is flattened and deformed when passing through the annular narrow groove. When the stretch spring steel sheet completely passes through the annular narrow groove and enters the wide groove of the limit track, the stretch spring steel sheet is completely extended and returned to its original position. The stretch spring steel sheet is blocked by the step and can only move inside the wide groove of the limit track, thereby reducing the mutual movement between the hook and the ring, having a shock-absorbing effect, and increasing the connection relationship between the hook and the ring to achieve the purpose of preventing falling off. The design is exquisite and the degree of automation is high.

[0031] (6) By rotating the lifting ring, the middle roller makes a circular motion in the wide groove of the limiting track. The partially stretched spring steel sheet will be flattened during the motion to ensure that it can pass through the curved surface of the track. When it passes the disassembly opening 48, the hook anti-drop device can be directly taken out, which is simple and convenient to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of a remote-controlled gantry crane capable of monitoring tension in one direction according to the present invention;

[0033] Figure 2It is a schematic diagram of the overall structure of a remote-controlled gantry crane capable of monitoring tension in another direction of the present invention;

[0034] Figure 3 A schematic diagram of the relative positions of the spanning wheel unit and the stopper of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure of the present invention spanning one direction of the wheel unit;

[0036] Figure 5 It is a schematic diagram of the structure of the present invention across the wheel unit in another direction;

[0037] Figure 6 This is a schematic diagram of the external connection of the moving wheel of the present invention;

[0038] Figure 7 It is a schematic diagram of the specific structure of the stopper of the present invention;

[0039] Figure 8 It is a schematic diagram of the external structure of the annular guide seat of the present invention;

[0040] Fig. 9 It is a schematic diagram of the specific structure of the auxiliary stopper of the present invention;

[0041] Fig.10 It is a schematic diagram of the driving structure of the double-head support block of the present invention;

[0042] Fig.11 It is a schematic diagram of the internal structure of the guide seat of the present invention;

[0043] Fig.12 It is a schematic diagram of the installation position of the lifting ring of the present invention;

[0044] Fig.13 It is a schematic diagram of the specific structure of the lifting ring of the present invention;

[0045] Fig.14 It is a schematic diagram of the external structure of the hook of the present invention;

[0046] Fig.15 It is a schematic diagram of the internal structure of the hook of the present invention;

[0047] Fig.16 It is a schematic diagram of the specific structure of the hook anti-dropping device of the present invention.

[0048] In the figure: 1, gantry; 2, crossbeam; 3, wheel seat; 4, wheel bottom groove; 7, stopper; 71, telescopic cylinder; 72, square telescopic rod; 73, triangular clamping block; 74, pressure head; 8, auxiliary stopper; 81, strip block; 82, cut surface; 83, guide column; 84, No. 1 spring; 85, curved stopper; 86, clamping teeth; 10, spanning wheel unit; 11, drive shaft; 12, wheel frame; 13, Connecting bearing; 14, moving wheel; 15, wheel axle; 16, bearing seat; 17, moving wheel driving structure; 18, anti-rotation slot; 19, triangular slot; 20, short shaft; 21, large gear; 22, small gear; 23, first control motor; 30, annular guide seat; 31, arc groove; 32, connecting spring; 33, strip groove; 34, high and low inclined surface; 40, lifting mechanism; 41, guide seat; 42 , main wire rope; 43, wire support rope; 44, hook; 45, lifting ring; 46, narrow annular groove; 47, wide groove of limiting track; 48, disassembly port; 49, container; 50, pressure rod; 51, first spring sleeve; 52, second spring; 53, rolling body; 54, second receiving slot; 55, third receiving slot; 56, hook anti-slip device; 561, carrier column; 562, second spring sleeve; 563, third spring; 564, connecting slot; 565, intermediate roller; 566, inner bearing; 567, extension spring steel sheet; 568, slider; 60, side support; 61, guide wheel; 62, pressure wheel; 63, tension sensor; 64, wire; 90, drive housing; 91, support block receiving slot; 92, first receiving slot; 93, boom; 96, hydraulic cylinder; 97, hydraulic rod; 98, double-head support block. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Embodiment 1

[0051] like Figure 1-13 As shown, this embodiment provides a remote-controlled gantry crane capable of monitoring tension, including a gantry 1, a crossbeam 2 is arranged on the top of the gantry 1, wheel seats 3 are symmetrically installed on the bottom of the gantry 1, wheel bottom grooves 4 are opened downward inside the wheel seats 3, and each set of wheel bottom grooves 4 are symmetrically installed with two sets of crossing wheel units 10 (one front and one rear correspondingly arranged).

[0052] Specifically, the crossing wheel unit 10 includes a driving shaft 11, which is fixed by two sets of connecting bearings 13 and the inner wall of the wheel bottom groove 4. Three sets of wheel frames 12 are annularly symmetrically distributed in the middle of the driving shaft 11. Each set of wheel frames 12 is equipped with a moving wheel 14. The angles between adjacent moving wheels 14 are 120 degrees. Parts of the moving wheels 14 extend out of the wheel bottom groove 4 during movement. Figure 3-5 shown.

[0053] Among them, a short shaft 20 is welded at one end of the driving shaft 11 away from the triangular slot 19, a large gear 21 is sleeved on the short shaft 20, a small gear 22 is meshed on one side of the large gear 21, and the small gear 22 is sleeved on the output shaft of the first control motor 23. The first control motor 23 is horizontally installed in the inner layer of the wheel seat 3. The large gear 21 and the small gear 22 are both arranged inside the driving housing 90, and the driving housing 90 is fixed on the outer surface of the wheel seat 3 to play the role of storage and limit. Figure 3-5 shown.

[0054] Among them, each set of moving wheels 14 is welded with axles 15 at both ends, and each set of axles 15 is fixed through a bearing seat 16 and the inner layer of the wheel frame 12. One set of axles 15 is externally connected to a moving wheel driving structure 17, which is installed on the outer side of the wheel frame 12. A driving motor is arranged in the moving wheel driving structure 17 (which is a prior art and will not be described in detail). The surface of the other set of axles 15 extending out of the wheel frame 12 is evenly provided with a plurality of anti-rotation slots 18, such as Figure 4-6 shown.

[0055] A triangular slot 19 is provided at the middle of one end surface of the driving shaft 11, and a stopper 7 is horizontally provided outside the triangular slot 19. The stopper 7 is fixed in the inner layer of the wheel seat 3. Figure 3 shown.

[0056] Specifically, the stopper 7 includes a telescopic cylinder 71, a square telescopic rod 72, a triangular clamp block 73 and a pressure head 74. Figure 7 shown.

[0057] In this embodiment, the telescopic cylinder 71 is installed through the outer surface of the wheel seat 3 on the side away from the drive housing 90, and a square telescopic rod 72 is horizontally arranged extending outward from the inside of the telescopic cylinder 71. A triangular clamping block 73 extending into the triangular clamping groove 19 is welded to the end of the square telescopic rod 72, and the two are of the same size. A pressure head 74 is welded at the middle position of the end of the triangular clamping block 73 away from the square telescopic rod 72.

[0058] Furthermore, the triangular slot 19 extends toward the inner side of the drive shaft 11 and is connected to a guide slot, and an annular guide seat 30 is provided in the guide slot for limiting position (a slide bar matching the guide slot can be installed on the annular guide seat 30 to play a role of limiting position and guiding). Figure 8 shown.

[0059] The annular guide seat 30 has an arc groove 31 in the middle of one end surface thereof for the pressure head 74 to extend into. The end of the annular guide seat 30 away from the arc groove 31 is fixed by a connecting spring 32 and the groove wall of the guide groove. The connecting spring 32 generates a restoring elastic force after being compressed, driving the annular guide seat 30 to return to its original position. Figure 8 shown.

[0060] Among them, three groups of strip grooves 33 are evenly distributed on the annular surface of the annular guide seat 30, and a high and low inclined surface 34 is arranged at the bottom of each group of strip grooves 33, and the high and low inclined surface 34 is high on one side and low on the other side to form a certain slope. An auxiliary stopper 8 is movably arranged in each group of strip grooves 33, such as Figure 8 shown.

[0061] Specifically, the auxiliary stopper 8 includes a bar block 81, a cut surface 82, a guide column 83, a No. 1 spring 84, a curved stopper block 85 and a latching tooth 86. Fig. 9 shown.

[0062] In this embodiment, the strip block 81 moves in the strip groove 33, and the widths of the two are matched. The bottom of the strip block 81 is provided with a cut surface 82 that fits the high and low slopes 34, and the two slide correspondingly. The upper end of the strip block 81 is connected to a guide column 83, and the outer surface of the drive shaft 11 is provided with a first receiving groove 92 for the guide column 83 to pass through. A No. 1 spring 84 that is sleeved on the outside of the guide column 83 is connected between the strip block 81 and the bottom of the first receiving groove 92. After being compressed, the No. 1 spring 84 generates a reset elastic force, which drives the guide column 83 and the strip block 81 to reset.

[0063] In this embodiment, a curved stop block 85 is welded to the upper end of the guide column 83. The stop block 85 is designed to be curved and adapt to the axial surface of the wheel axle 15. A plurality of groups of latch teeth 86 are installed on the upper end surface of the curved stop block 85. The latch teeth 86 are unevenly distributed. The latch teeth 86 act on the anti-rotation slots 18. The latch teeth 86 can be randomly inserted into a group of anti-rotation slots 18 to achieve stopping.

[0064] Furthermore, two groups of hydraulic cylinders 96 are symmetrically installed inside the gantry 1, and a hydraulic rod 97 is extended downward inside the hydraulic cylinder 96. A double-headed support block 98 is welded to the lower end of the hydraulic rod 97. A support block receiving groove 91 for receiving the double-headed support block 98 is opened in the inner layer of the wheel seat 3. The lower end of the double-headed support block 98 extends out of the support block receiving groove 91 and contacts the ground, playing a supporting and anti-slip role. Figure 1 , 2 and 10;

[0065] Furthermore, a lifting mechanism 40 is riveted to the lower end surface of the crossbeam 2, such as Figure 1 shown.

[0066] The lifting mechanism 40 includes a hoisting motor, a reducer and two sets of rope drums. The main wire rope 42 of each set of rope drums extends downward through the guide seat 41. The two sets of guide seats 41 are symmetrically installed at the bottom of the lifting mechanism 40 (the lifting mechanism 40 is a prior art and will not be described in detail). Figure 1 and 2 shown.

[0067] Further, the lower end of the main steel wire rope 42 is fixedly connected with two sets of steel wire support ropes 43, and the lower end of each set of steel wire support ropes 43 is installed with a hook 44, and the four sets of hooks 44 are respectively connected to four sets of lifting rings 45, and the four sets of lifting rings 45 are movably installed on the top of the container 49. The top four corners of the container 49 are welded with lifting arms 93 for the lifting rings 45 to move. Figure 2 , 12 and 13.

[0068] Among them, a side support 60 is riveted in the middle of each guide seat 41, and two sets of guide wheels 61 are symmetrically installed at the upper and lower positions of the side support 60. A pressure wheel 62 is installed on the side support 60 and between the two sets of guide wheels 61. The pressure wheel 62 and the two sets of guide wheels 61 act on the main steel wire rope 42. A tension sensor 63 is installed on the pressure wheel 62. The wire 64 of the tension sensor 63 extends out of the guide seat 41. The value monitored by the tension sensor 63 will be transmitted to the display, such as Fig.11 shown.

[0069] Furthermore, an electrical control console is provided on the outside of the gantry 1, including an electrical control system. The electrical control system realizes system communication through the CAN bus, adopts electro-hydraulic hybrid drive and full electrical signals to control all actions of the gantry 1, and all parameters and real-time images of the crane can be observed through the display on the electrical control console to achieve the purpose of remote control.

[0070] When this embodiment is in use, the four groups of hooks 44 are connected to the four groups of lifting rings 45 respectively, the winch motor is started, and the two groups of rope drums are synchronously driven to rotate after being decelerated by the reducer. The four groups of steel wire support ropes 43 lift the container 49. When the main steel wire rope 42 moves in the guide seat 41, it will contact the pressure wheel 62 and the two groups of guide wheels 61 in turn to achieve the guiding effect. At the same time, the main steel wire rope 42 will cause the pressure wheel 62 to rotate. The relative force between the two can be detected by the tension sensor 63, so as to calculate the lifting tension exerted on the main steel wire rope 42.

[0071] When the gantry 1 is moving, the two groups of moving wheels 14 at the bottom of the crossing wheel unit 10 extend out of the wheel bottom groove 4 (the upper group of moving wheels 14 is located in the wheel bottom groove 4), and contact the ground to form two-point support. The driving motor in the moving wheel driving structure 17 is turned on by remote control, and the wheel axle 15 drives the moving wheel 14 to rotate. The four groups of crossing wheel units 10 work synchronously, and the gantry 1 achieves the purpose of walking; when the gantry 1 encounters an obstacle or a step during walking, the first control motor 23 is started by remote control to drive the small gear 22 to rotate, and the large gear 21 is caused to rotate through meshing deceleration, the short shaft 20 drives the driving shaft 11 to rotate 120°, the moving wheel 14 realizes revolution, and the three groups of moving wheels 14 exchange positions, so that the crossing wheel unit 10 can be flipped over, crossing obstacles or climbing stairs.

[0072] When there is no need to cross obstacles or steps (i.e., to avoid the movement of the moving wheel 14), the telescopic cylinder 71 is remotely controlled to start the telescopic cylinder 71, and the square telescopic rod 72 is extended outward, driving the triangular clamping block 73 to be inserted into the triangular clamping groove 19, thereby locking the drive shaft 11. When the gantry 1 needs to load and unload containers 49, the two sets of hydraulic cylinders 96 are remotely controlled to start the hydraulic rod 97 downward, and the lower end of the double-headed support block 98 extends out of the support block storage groove 91 and contacts the ground to achieve a supporting effect. At the same time, the square telescopic rod 72 is allowed to continue to extend a distance, so that the pressure head 74 on the triangular clamping block 73 contacts the arc. The groove 31 pushes the annular guide seat 30 to move linearly in the guide groove (the connecting spring 32 is compressed), causing the bar blocks 81 on each group of auxiliary stoppers 8 to move relative to the bar groove 33 (the cut surface 82 and the high and low slopes 34 act on each other), causing the bar blocks 81 to be lifted in the vertical direction, and the three groups of guide columns 83 move outward respectively (the No. 1 spring 84 is compressed), driving the curved stop blocks 85 to contact the anti-rotation grooves 18 on each group of wheel axles 15, so that the teeth 86 are randomly inserted into the anti-rotation grooves 18, locking the wheel axles 15, preventing the moving wheels 14 from rotating, and assisting in the fixation of the entire crane.

[0073] Embodiment 2

[0074] On the basis of the first embodiment, during the lifting process, since the hook 44 and the ring 45 are hooked, the hook may be unhooked, causing the container 49 to fall off accidentally, causing safety problems. In order to solve the above technical problems, we have the following design, such as Figure 14-16 shown.

[0075] Specifically, a second receiving groove 54 is provided in the middle of the inner side surface of the hook 44, and a pressure rod 50 is movably provided in the second receiving groove 54. The second receiving groove 54 plays a role of limiting guide. Fig.14 shown.

[0076] The middle part of the pressure rod 50 is provided with a first spring sleeve 51, and a second spring 52 sleeved on the outside of the pressure rod 50 is connected between the first spring sleeve 51 and the bottom of the second receiving groove 54. When the second spring 52 is stretched, it generates an elastic force to drive the pressure rod 50 to reset upward. Fig.14 and 15 shown.

[0077] The upper end of the pressure rod 50 is in contact with the inner surface of the lifting ring 45, and the lower end of the pressure rod 50 is located in the arc slide. The arc slide is opened inside the hook 44. Several groups of rolling bodies 53 are arranged in sequence in the arc slide (the rolling bodies 53 can be selected as balls or rollers). The upper and lower inner walls of the arc slide are the two starting points for the movement of the rolling bodies 53. The surface of the rolling bodies 53 is smooth and the resistance is small. The size of the rolling bodies 53 is adapted to the inner diameter of the arc slide. The adjacent rolling bodies 53 roll on each other. The pressure rod 50 is in contact with the lowest group of rolling bodies 53 ( Fig.15 The initial state of both is shown in Fig.15 shown.

[0078] Furthermore, the uppermost group of rolling elements 53 is in contact with the hook anti-dropping device 56, as shown in FIG. Fig.15 shown.

[0079] Specifically, the hook anti-drop device 56 includes a carrier column 561, a second spring sleeve 562, a third spring 563, a connecting groove 564, an intermediate roller 565, an inner bearing 566, a stretch spring steel sheet 567, and a slider 568. Fig.14 and 16 shown.

[0080] In this embodiment, a third receiving groove 55 is provided on the upper inner side surface of the hook 44, and the third receiving groove 55 serves as a limiting guide. A carrier column 561 is horizontally movably arranged in the third receiving groove 55, and a second spring sleeve 562 is sleeved on the middle part of the carrier column 561. A No. 3 spring 563 sleeved on the outside of the carrier column 561 is connected between the second spring sleeve 562 and the third receiving groove 55. When the No. 3 spring 563 is compressed, it generates an elastic force that drives the carrier column 561 to return inward.

[0081] In this embodiment, a portion of the carrier column 561 is located in the arc-shaped slideway and interacts with the uppermost group of rolling elements 53 ( Fig.15 The figure shows the initial state of the two), a connecting groove 564 is provided in the middle of the end surface of the carrier column 561 extending out of the third receiving groove 55.

[0082] In this embodiment, an intermediate roller 565 is rotatably arranged in the connecting groove 564. The end of the intermediate roller 565 is fixed by an inner bearing 566 and the connecting groove 564. The intermediate roller 565 rotates around the carrier column 561 to convert the motion resistance into rotational friction. A plurality of groups of stretch spring steel sheets 567 are evenly welded around the outer side surface of the intermediate roller 565. The stretch spring steel sheets 567 are made of spring steel material and have deformation restoring properties. They are initially in a state of tilting outward. A slider 568 is arranged at one end of the intermediate roller 565 away from the inner bearing 566.

[0083] Furthermore, a narrow annular groove 46 is provided on one side of the lifting ring 45, and a wide limit track groove 47 is provided inside the narrow annular groove 46. The wide limit track groove 47 is larger than the narrow annular groove 46, and a circle of steps is provided at the junction of the wide limit track groove 47 and the narrow annular groove 46. Fig.13 shown.

[0084] The stretch spring steel sheet 567 is flattened and deformed when passing through the annular narrow groove 46 , so that it can pass through the annular narrow groove 46 , and the size of the intermediate roller 565 is smaller than the size of the annular narrow groove 46 .

[0085] Furthermore, when the extension spring steel sheet 567 completely passes through the annular narrow groove 46 and enters into the wide groove 47 of the limiting track, the extension spring steel sheet 567 completely extends back to its original position, the extension spring steel sheet 567 is laterally limited by the step, and the hook anti-slip device 56 is confined in the wide groove 47 of the limiting track.

[0086] The annular narrow groove 46 is partially provided with a disassembly opening 48 connected to the wide groove 47 of the limiting track, and the hook anti-dropping device 56 is taken out from the disassembly opening 48, and the cross section of the disassembly opening 48 is circular, such as Fig.13 shown.

[0087] When the present embodiment is in use, after each group of hooks 44 and rings 45 are connected, the goods begin to be lifted upwards. At this time, relative pressure is generated between the inner side surfaces of the hooks 44 and the inner side surfaces of the rings 45, and the pressure rod 50 on the hooks 44 is completely pressed into the second receiving groove 54 (the second spring 52 is stretched). The lower end of the pressure rod 50 exerts an extrusion effect on the lowest group of rolling bodies 53, causing the rolling bodies 53 to roll in the arc-shaped slideway, and through the continuous mutual force, each group of rolling bodies 53 is slightly moved along the arc-shaped slideway. During the movement, the uppermost group of rolling bodies 53 exerts an extrusion effect on the carrier column 561, causing the carrier column 561 to move linearly outward along the third receiving groove 55 (the third spring 563 is compressed), driving the intermediate roller 565 to begin to pass through the annular narrow groove 46 on the side of the ring 45. In this process, the intermediate roller 565 in the unfolded and tilted state The stretch spring steel sheet 567 is flattened and deformed when passing through the annular narrow groove 46. When the stretch spring steel sheet 567 completely passes through the annular narrow groove 46 and enters the limiting track wide groove 47, the stretch spring steel sheet 567 is fully stretched back. The stretch spring steel sheet 567 is blocked by the step at the junction of the limiting track wide groove 47 and the annular narrow groove 46 and cannot escape outward. It can only move inside the limiting track wide groove 47. The hook 44 and the lifting ring 45 increase the connection and limit relationship, and achieve the purpose of automatic anti-falling. When it is necessary to remove the hook anti-falling device 56 from the lifting ring 45, by rotating the lifting ring 45, the middle roller 565 is allowed to make a circular motion in the limiting track wide groove 47 (the partial stretch spring steel sheet 567 will be flattened during the movement to ensure that it can pass through the track arc surface) until the hook anti-falling device 56 is directly taken out when passing the disassembly opening 48.

[0088] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0089] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A remote-controlled gantry crane capable of monitoring tension, comprising a gantry (1), characterized in that: A crossbeam (2) is arranged on the top of the gantry (1), and a wheel seat (3) is symmetrically installed on the bottom of the gantry (1). A wheel bottom groove (4) is opened downward inside the wheel seat (3), and each group of the wheel bottom grooves (4) is symmetrically installed with two groups of crossing wheel units (10). The crossing wheel unit (10) comprises a driving shaft (11), and the driving shaft (11) is fixed by two groups of connecting bearings (13) and the inner wall of the wheel bottom groove (4). Three groups of wheel frames (12) are annularly symmetrically distributed in the middle of the driving shaft (11), and each group of the wheel frames (12) is installed with a moving wheel (14), and a part of the moving wheel (14) extends out of the wheel bottom groove (4) during movement. A triangular groove (19) is opened at the middle position of one end surface of the driving shaft (11), and a stopper (7) is horizontally arranged outside the triangular groove (19), and the stopper (7) is fixed in the inner layer of the wheel seat (3); Two groups of hydraulic cylinders (96) are symmetrically installed inside the gantry (1), a hydraulic rod (97) is extended downward inside the hydraulic cylinder (96), a double-headed support block (98) is welded to the lower end of the hydraulic rod (97), a support block receiving groove (91) for receiving the double-headed support block (98) is opened in the inner layer of the wheel seat (3), and the lower end of the double-headed support block (98) extends out of the support block receiving groove (91) and contacts the ground; A lifting mechanism (40) is riveted to the lower end surface of the cross beam (2), and the lifting mechanism (40) includes a hoisting motor, a reducer and two groups of rope drums. The main wire rope (42) of each group of rope drums extends downward through a guide seat (41). The two groups of guide seats (41) are symmetrically installed at the bottom of the lifting mechanism (40). The lower end of the main wire rope (42) is fixedly connected with two groups of wire support ropes (43). The lower end of each group of wire support ropes (43) is installed with a hook (44). The four groups of hooks (44) are respectively connected to four groups of lifting rings (45). The four groups of lifting rings (45) are movably installed on the top of the container (49). The top four corners of the container (49) are welded with lifting arms (93) for the lifting rings (45) to move. An electrical control console is arranged on the outside of the gantry (1), including an electrical control system. The electrical control system realizes system communication via a CAN bus, adopts an electro-hydraulic hybrid drive and fully electrical signal control to realize all actions of the gantry (1), and all parameters and real-time images of the crane are observed via a display on the electrical control console.

2. The remote-controlled gantry crane capable of monitoring tension according to claim 1, characterized in that: A short shaft (20) is welded to one end of the driving shaft (11) away from the triangular slot (19); a large gear (21) is sleeved on the short shaft (20); a small gear (22) is meshedly arranged on one side of the large gear (21); the small gear (22) is sleeved on the output shaft of a first control motor (23); the first control motor (23) is horizontally mounted in the inner layer of the wheel seat (3); the large gear (21) and the small gear (22) are both arranged inside a driving housing (90); and the driving housing (90) is fixed on the outer surface of the wheel seat (3).

3. The remote-controlled gantry crane capable of monitoring tension according to claim 2, characterized in that: Wheel axles (15) are welded at both ends of each group of the moving wheels (14), and each group of the wheel axles (15) is fixed through a bearing seat (16) and the inner layer of the wheel frame (12). One group of the wheel axles (15) is externally connected to a moving wheel driving structure (17), and the moving wheel driving structure (17) is installed on the outer side of the wheel frame (12). The surface of the part of the wheel axles (15) of the other group that protrudes from the wheel frame (12) is evenly provided with a plurality of groups of anti-rotation grooves (18).

4. The remote-controlled gantry crane capable of monitoring tension according to claim 3, characterized in that: The stopper (7) comprises a telescopic cylinder (71), a square telescopic rod (72), a triangular clamping block (73) and a pressure head (74); the telescopic cylinder (71) is installed through the outer surface of the wheel seat (3) on a side away from the drive housing (90); a square telescopic rod (72) is horizontally arranged extending outward from the inside of the telescopic cylinder (71); a triangular clamping block (73) extending into the triangular clamping groove (19) is welded to the end of the square telescopic rod (72); and a pressure head (74) is welded at the middle position of one end of the triangular clamping block (73) away from the square telescopic rod (72).

5. The remote-controlled gantry crane capable of monitoring tension according to claim 4, characterized in that: The triangular groove (19) extends toward the inner side of the driving shaft (11) and is connected to a guide groove. An annular guide seat (30) is provided in the guide groove for limiting position. A circular arc groove (31) for the pressure head (74) to extend into is provided at the middle position of one end surface of the annular guide seat (30). The end of the annular guide seat (30) away from the circular arc groove (31) is fixed by connecting a spring (32) and a groove wall of the guide groove. Three groups of strip grooves (33) are evenly distributed on the annular surface of the annular guide seat (30). The bottom of each group of the strip grooves (33) is provided with a high and low inclined surface (34). An auxiliary stopper (8) is movably provided in each group of the strip grooves (33).

6. The remote-controlled gantry crane capable of monitoring tension according to claim 5, characterized in that: The auxiliary stopper (8) comprises a strip block (81), a cut surface (82), a guide column (83), a No. 1 spring (84), a curved stop block (85) and a latching tooth (86); the strip block (81) moves in the strip groove (33); the bottom of the strip block (81) is provided with a cut surface (82) that fits the high and low inclined surface (34); the upper end of the strip block (81) is connected to the guide column (83); the drive shaft (11) The outer surface of the guide post (83) is provided with a first receiving groove (92) for the guide post (83) to pass through, a first spring (84) sleeved on the outside of the guide post (83) is connected between the strip block (81) and the bottom of the first receiving groove (92), a curved stop block (85) is welded to the upper end of the guide post (83), and a plurality of groups of latch teeth (86) are installed on the upper end surface of the curved stop block (85), and the latch teeth (86) act on the anti-rotation latch groove (18).

7. The remote-controlled gantry crane capable of monitoring tension according to claim 1, characterized in that: A side support (60) is riveted at the middle position of each group of the guide seats (41), and two groups of guide wheels (61) are symmetrically installed at the upper and lower positions of the side support (60). A pressure wheel (62) is installed on the side support (60) and between the two groups of guide wheels (61). The pressure wheel (62) and the two groups of guide wheels (61) both act on the steel wire main rope (42). A tension sensor (63) is installed on the pressure wheel (62), and the wire (64) of the tension sensor (63) extends out of the guide seat (41).

8. The remote-controlled gantry crane capable of monitoring tension according to claim 1, characterized in that: A second receiving groove (54) is provided in the middle of the inner side surface of the hook (44), a pressure rod (50) is movably provided in the second receiving groove (54), a first spring sleeve (51) is provided in the middle of the pressure rod (50), a second spring (52) sleeved on the outside of the pressure rod (50) is connected between the first spring sleeve (51) and the bottom of the second receiving groove (54), the upper end of the pressure rod (50) is in contact with the inner surface of the lifting ring (45), the lower end of the pressure rod (50) is located in an arc slide, the arc slide is provided inside the hook (44), a plurality of groups of rolling bodies (53) are arranged in sequence in the arc slide, adjacent rolling bodies (53) roll against each other, the pressure rod (50) is in contact with the lowest group of rolling bodies (53), and the highest group of rolling bodies (53) is in contact with the hook anti-dropping device (56).

9. The remote-controlled gantry crane capable of monitoring tension according to claim 8, characterized in that: The hook anti-drop device (56) comprises a carrier column (561), a second spring sleeve (562), a third spring (563), a connecting groove (564), an intermediate roller (565), an inner bearing (566), an extension spring steel sheet (567), and a slider (568). A third receiving groove (55) is provided at the upper position of the inner side surface of the hook (44). A carrier column (561) is horizontally movably arranged in the third receiving groove (55). The middle part of the carrier column (561) is sleeved with the second spring sleeve (562). A third spring sleeved outside the carrier column (561) is connected between the second spring sleeve (562) and the third receiving groove (55). (563), a part of the carrier column (561) is located in the arc-shaped slideway and interacts with the uppermost group of rolling bodies (53), a connecting groove (564) is provided in the middle of the end surface of the carrier column (561) extending out of the third receiving groove (55), an intermediate roller (565) is rotatably arranged in the connecting groove (564), the end of the intermediate roller (565) is fixed by an inner bearing (566) and the connecting groove (564), a plurality of groups of stretch spring steel sheets (567) are uniformly welded around the outer side surface of the intermediate roller (565), and a slider (568) is provided at one end of the intermediate roller (565) away from the inner bearing (566).

10. The remote-controlled gantry crane capable of monitoring tension according to claim 9, characterized in that: A narrow annular groove (46) is provided on one side of the lifting ring (45), and a wide limit track groove (47) is provided inside the narrow annular groove (46). The wide limit track groove (47) is larger than the size of the narrow annular groove (46). The stretch spring steel sheet (567) is flattened and deformed when passing through the narrow annular groove (46). When the stretch spring steel sheet (567) completely passes through the narrow annular groove (46) and enters the wide limit track groove (47), the stretch spring steel sheet (567) is fully extended and returned to its original position, and the hook anti-slip device (56) is restricted in the wide limit track groove (47). A disassembly opening (48) connected to the wide limit track groove (47) is partially provided on the narrow annular groove (46), and the hook anti-slip device (56) is taken out from the disassembly opening (48).

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