Trolley system and ship unloader

Abstract

The present invention relates to the technical field of port equipment, and in particular to a trolley system and a ship unloader. The trolley system includes a running trolley, and the running trolley includes: a frame; a wheel frame, including a first connecting part and a second connecting part, the first connecting part and the second connecting part are symmetrically arranged and are both rotatably connected to the frame, the first connecting part and the second connecting part are connected by an elastic member, and the lower ends of the first connecting part and the second connecting part are both provided with running wheels, and the running wheels are suitable for rolling along the first track to drive the frame to run along the first track. In the trolley system provided by the present invention, the first connecting part or the second connecting part can convert the upward movement trend of the running wheel into a rotation around the frame, and the elastic member arranged between the first connecting part and the second connecting part has a buffering effect, which can further reduce the amplitude of the rotation of the first connecting part or the second connecting part around the frame, thereby reducing the jumping amplitude of the running wheel and achieving a shock-absorbing effect on the running trolley.

Description

Technical Field

[0001] The present invention relates to the technical field of port equipment, and in particular to a trolley system and a ship unloader. Background Art

[0002] Ship unloaders are executive equipment for loading and unloading bulk materials. Chain bucket ship unloaders solve the problems of traditional grab bucket ship unloaders that may cause material leakage and dust during use. They have outstanding environmental advantages and are therefore widely used in bulk cargo unloading terminals at ports. The reclaiming device of the chain bucket ship unloader is installed on a trolley that can move along the beam of the ship unloader. The movement of the trolley along the track on the beam drives the movement of the reclaiming device, so that the reclaiming device can reclaim materials at different positions in the cabin. However, during the actual operation of the reclaiming device, the force of the waves on the cabin is transmitted to the trolley through the reclaiming device, causing the trolley to shake and vibrate, reducing the stability of the operation. The material in the reclaiming device is spilled due to the vibration, and even serious accidents such as the reclaiming device colliding with the cabin and the trolley overturning may occur, posing a huge safety hazard. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the trolley system is susceptible to vibration and runs unsteadily, thereby providing a trolley system capable of shock absorption.

[0004] Another technical problem to be solved by the present invention is to overcome the defect in the prior art that the trolley system of the ship unloader is susceptible to vibration and runs unsteadily, thereby providing a ship unloader capable of reducing the vibration of the trolley.

[0005] In order to solve the above technical problems, the present invention provides a trolley system, including a running trolley, which includes: a frame; a wheel frame, including a first connecting part and a second connecting part, the first connecting part and the second connecting part are symmetrically arranged and are both rotatably connected to the frame, the first connecting part and the second connecting part are connected by an elastic part, and the lower ends of the first connecting part and the second connecting part are both provided with running wheels, and the running wheels are suitable for rolling along the first track to drive the frame to run along the first track.

[0006] Optionally, the elastic member is arranged at the upper end of the wheel frame, the first connecting portion and the second connecting portion are hinged to the frame respectively, and the hinge point is located relatively below the elastic member.

[0007] Optionally, the number of the wheel racks is at least two groups, and at least two groups of the wheel racks are symmetrically arranged on both sides of the width direction of the frame.

[0008] Optionally, the traveling wheel contacts the upper surface of the first track, and the running trolley further includes: a horizontal wheel, the horizontal wheel is in rolling contact with the side of the first track, and the horizontal wheel is suitable for rotating around a vertical axis.

[0009] Optionally, the running trolley further includes: a counter roller, which is arranged vertically opposite to the traveling wheel and is suitable for contacting the lower surface of the second track, wherein the second track is parallel to the first track and is located below the first track.

[0010] Optionally, the running trolley further includes: a trolley traction device, which is connected to the frame and is suitable for pulling the running trolley to move along the running direction.

[0011] Optionally, the trolley traction device includes: a pulley assembly; a traction rope, which passes around the pulley assembly and is connected to both sides of the running trolley along the running direction, suitable for providing traction to the running trolley; a driving device, including a driving part and a first rotating part, the driving part drives the first rotating part to rotate, the traction rope is wound around the first rotating part, the traction rope has a tensioned state for pressing the first rotating part and a relaxed state for loosening the first rotating part, and the first rotating part is suitable for driving the traction rope to move when the traction rope is in the tensioned state; a tensioning device, which abuts against the traction rope, and the tensioning device is suitable for adjusting the traction rope to switch between the tensioned state and the relaxed state.

[0012] Optionally, the tensioning device includes: a rotating rod rotatably arranged on an external structure, with two ends of the rotating rod arranged up and down and respectively abutting against the traction rope, and the rotating rod adjusts the tightness of the traction rope by rotating relative to the external structure.

[0013] Optionally, a first tensioning wheel and a second tensioning wheel are respectively provided at both ends of the rotating rod, the first tensioning wheel is located relatively above the second tensioning wheel, and the traction rope is passed around the first tensioning wheel and the second tensioning wheel.

[0014] Optionally, the tensioning device further includes: a tensioning driving portion, which is connected to the rotating rod and is suitable for driving the rotating rod to rotate.

[0015] Optionally, the rotating rod is rotatably connected to the external structure via a hinge, and the tensioning drive unit drives the rotating rod to rotate around the hinge along a first rotation direction to loosen the traction rope; or, the tensioning drive unit drives the rotating rod to rotate around the hinge along a second rotation direction to tension the traction rope.

[0016] Optionally, the trolley system also includes: a detection device, which is arranged corresponding to the running trolley, suitable for detecting the start and stop of the running trolley, and controlling the action of the tensioning drive part when it is detected that the running trolley stops, so as to switch the traction rope to the relaxed state.

[0017] The ship unloader provided by the present invention comprises: the trolley system as described above.

[0018] The technical solution of the present invention has the following advantages:

[0019] 1. The trolley system provided by the present invention is configured to have a first connection part and a second connection part of the wheel frame both rotatably connected to the frame, and an elastic member is configured to connect the first connection part and the second connection part, so that when the running wheel of the running trolley bounces due to external force, the first connection part or the second connection part can convert the upward movement trend of the running wheel into a rotation around the frame, and the elastic member arranged between the first connection part and the second connection part has a buffering effect, which can further reduce the amplitude of rotation of the first connection part or the second connection part around the frame, thereby reducing the jumping amplitude of the running wheel, achieving a shock-absorbing effect on the running trolley, preventing the running trolley from leaving the track, thereby reducing the collision between the running wheel and the first track. In addition, the elastic member can also avoid damage to the first connection part and the second connection part due to rigid collision, thereby extending the service life of the device.

[0020] 2. The trolley system provided by the present invention connects the upper ends of the first connecting part and the second connecting part by arranging an elastic member, and the hinge points of the first connecting part, the second connecting part and the frame are located relatively below the elastic member, so that when one of the first connecting part or the second connecting part rotates upward around the hinge point, the elastic member at the upper end can press the other downward, thereby reducing the bouncing amplitude of the wheel and increasing the stability of the running trolley.

[0021] 3. The trolley system provided by the present invention realizes the cooperation between the horizontal wheels and the side rolling contact of the first track by setting the horizontal wheels and acting together on the two adjacent surfaces of the first track, thereby increasing the stability of the running trolley along the first track. At the same time, under the action of the running wheels and the horizontal wheels on the wheel frames symmetrically arranged on both sides along the width direction of the frame, the running trolley is effectively prevented from derailing, thereby ensuring the reliability of the running trolley and improving work efficiency.

[0022] 4. The trolley system provided by the present invention, by setting a counter-roller to contact the lower surface of the second track, the counter-roller drives the frame to run along the second track, further ensuring the stability of the running trolley along the running direction, and the counter-roller, the walking wheel and the counter-roller work together to make the force on the running trolley more stable, ensuring that the trolley system will not overturn.

[0023] 5. The trolley system provided by the present invention is configured to have a tensioned state in which the traction rope is compressed and a relaxed state in which the first rotating part is released, and the driving part is configured to drive the first rotating part to rotate. When the traction rope is in the tensioned state, it is driven to rotate by the first rotating part, and the tensioning device is configured to adjust the traction rope to switch between the tensioned state and the relaxed state. When the tensioning device adjusts the traction rope to the tensioned state, the first rotating part drives the traction rope to move, thereby pulling the running trolley to run, and when the tensioning device adjusts the traction rope to the relaxed state, the first rotating part cannot drive the traction rope to move, thereby cannot provide traction for the running trolley, thereby realizing the adjustment of whether the traction rope provides traction to the running trolley by the tensioning device. In this process, the presence or absence of traction on the traction rope can be realized by simply adjusting the tension of the traction rope through the tensioning device. The operation is convenient and there is no need to frequently start and stop the driving device, which is conducive to extending the service life of the driving device, saving costs, and effectively improving the stability of traction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of the ship unloader of the present invention;

[0026] Figure 2 It is a front view schematic diagram of the trolley system of the present invention;

[0027] Figure 3 for Figure 1 A partial enlarged view of the connection between the trolley system and the rotating arm;

[0028] Figure 4 It is a side view schematic diagram of the trolley system of the present invention;

[0029] Figure 5It is a structural schematic diagram of the wheel frame and wheel part of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the trolley traction device of the present invention;

[0031] Figure 7 Schematic diagram of the structure of the driving device of the present invention.

[0032] Description of reference numerals:

[0033] 2. Cabin; 4. Wharf foundation; 10. Gantry body; 11. Gantry legs; 20. Main beam; 21. Rotating boom; 100. Reclaiming device;

[0034] 30. Traveling trolley; 301. Frame; 320. Wheel frame; 321. First connecting portion; 322. Second connecting portion; 323. Elastic member; 324. First hinge point; 325. Second hinge point; 331. Traveling wheel; 332. Horizontal wheel; 333. Counter roller; 341. First track; 342. Second track;

[0035] 500, trolley traction device; 501, traction rope; 510, drive device; 511, drive unit; 512, first rotating unit; 513, reducer; 521, rotating rod; 522, first tensioning pulley; 523, second tensioning pulley; 524, tensioning drive unit; 525, hinge point; 526, second rotating unit; 531, first fixed pulley set; 532, second fixed pulley set; 533, first redirecting pulley; 534, second redirecting pulley. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] Combine Figure 1-Figure 7 As shown, the trolley system provided in this embodiment includes a running trolley 30, and the running trolley 30 includes: a frame 301 and a wheel frame 320, the wheel frame 320 includes a first connecting portion 321 and a second connecting portion 322, the first connecting portion 321 and the second connecting portion 322 are symmetrically arranged and are both rotatably connected to the frame 301, the first connecting portion 321 and the second connecting portion 322 are connected by an elastic member 323, the lower ends of the first connecting portion 321 and the second connecting portion 322 are both provided with running wheels 331, the running wheels 331 are suitable for rolling along the first track 341 to drive the frame 301 to run along the first track 341. It should be noted that the lower end refers to the Figure 2 The end in the direction of “down” indicated by the middle arrow; the first track 341 is the running track of the running trolley 30.

[0042] Optionally, the elastic member 323 is an elastic body such as a spring or rubber, which has good elasticity and is inexpensive.

[0043] The trolley system provided in this embodiment is configured such that the first connecting portion 321 and the second connecting portion 322 of the wheel frame 320 are both rotatably connected to the vehicle frame 301, and an elastic member 323 is configured to connect the first connecting portion 321 and the second connecting portion 322, so that when the running wheel 331 of the running trolley 30 bounces due to an external force, the first connecting portion 321 or the second connecting portion 322 can convert the upward movement trend of the running wheel 331 into a rotation around the vehicle frame 301, and the first connecting portion 321 and the second connecting portion are configured to rotate the running wheel 331 around the vehicle frame 301. The elastic member 323 between the connecting parts 322 has a buffering effect, which can further reduce the rotation amplitude of the first connecting part 321 or the second connecting part 322 around the frame 301, thereby reducing the jumping amplitude of the walking wheel 331, achieving a shock-absorbing effect on the running trolley 30, preventing the running trolley 30 from leaving the track, thereby reducing the collision between the walking wheel 331 and the first track 341. In addition, the elastic member 323 can also prevent the first connecting part 321 and the second connecting part 322 from being damaged due to rigid collision, thereby extending the service life of the device.

[0044] It should be noted that compared with the rigidly connected structure, the two running wheels 331 on the wheel frame 320 of this embodiment are indirectly connected through the elastic member 323. During the deflection process, the elastic member 323 can absorb the overturning torque to prevent the wheel on the force side from lifting and leaving the track, thereby reducing the collision between the wheel and the track.

[0045] Specifically, the elastic member 323 is provided at the upper end of the wheel frame 320, the first connecting portion 321 and the second connecting portion 322 are respectively hinged to the frame 301, and the hinge point is located relatively below the elastic member 323. It should be noted that the upper end refers to the upper end along the wheel frame 320. Figure 2 The arrow in the middle refers to the "upper" direction; the lower side refers to the direction along Figure 2 The middle arrow points to the direction of "down"; the first connecting portion 321 is hinged to the frame 301 through the first hinge point 324, and the second connecting portion 322 is hinged to the frame 301 through the second hinge point 325.

[0046] The trolley system provided in this embodiment connects the upper ends of the first connecting part 321 and the second connecting part 322 by setting an elastic part 323, and the hinge point of the first connecting part 321, the second connecting part 322 and the frame 301 is located relatively below the elastic part 323, so that when one of the first connecting part 321 or the second connecting part 322 rotates upward around the hinge point, the elastic part 323 at the upper end can press the other downward, thereby reducing the wheel's bouncing amplitude and increasing the stability of the running trolley 30.

[0047] It should be noted that the feeding device 100 of the new chain bucket ship unloader adopts a two-stage telescopic structure, which is structurally divided into a lower feeding head and an upper discharge head. Both parts are pulled by a wire rope and naturally droop under their own gravity during operation, while the lower feeding head can slide along the track of the upper discharge head, and the upper discharge head can move up and down along the lifting bracket. Under the action of the contact force of the bottom of the ship, the lower feeding head can automatically retract upward to avoid damage to the feeding device, and can perform feeding operations uninterruptedly with high work efficiency. However, vibration will inevitably be generated during the upward retraction process of the lower feeding head. The vibration will be transmitted to the running trolley 30 connected to the feeding device 100, which will affect the running stability of the trolley. The elastic member 323 on the wheel frame 320 provided in this embodiment can effectively avoid the transmission of vibration, thereby ensuring the stability of the operation.

[0048] Specifically, there are at least two groups of wheel carriers 320, and at least two groups of wheel carriers 320 are symmetrically arranged on both sides of the width direction of the frame 301. It should be noted that a track is provided on each side of the width direction of the frame 301, and the at least two groups of wheel carriers 320 are symmetrically arranged with the tracks on both sides of the frame 301 to ensure the stability of the frame 301. Figure 2 The arrow in the middle points to the "width direction".

[0049] Preferably, the number of the wheel frames 320 is four, and two groups of wheel frames 320 are respectively provided on both sides of the frame 301 along the width direction, thereby further increasing the stability of the structure.

[0050] Specifically, the walking wheel 331 is in contact with the upper surface of the first track 341, and the running trolley 30 further includes: a horizontal wheel 332, the horizontal wheel 332 is in rolling contact with the side of the first track 341, and the horizontal wheel 332 is suitable for rotating around the vertical axis. It should be noted that the upper surface refers to the Figure 2 The arrow in the middle refers to the surface in the direction of "up"; the side surface refers to the surface adjacent to the upper surface and parallel to the extension direction of the first track 341; the vertical direction refers to Figure 2 The arrow in the middle points to the "vertical direction".

[0051] The trolley system provided in this embodiment realizes the cooperation between the horizontal wheel 332 and the running wheel 331 by setting the horizontal wheel 332 to roll with the side of the first track 341, and jointly act on the two adjacent surfaces of the first track 341, thereby increasing the stability of the running trolley 30 along the first track 341. At the same time, under the action of the running wheels 331 and the horizontal wheels 332 on the wheel frames 320 symmetrically arranged on both sides of the width direction of the frame 301, the running trolley 30 is effectively prevented from derailing, thereby ensuring the reliability of the operation of the running trolley 30 and improving work efficiency.

[0052] Specifically, the running trolley 30 further includes: a counter roller 333, which is arranged vertically opposite to the running wheel 331 and is suitable for contacting the lower surface of the second track 342, wherein the second track 342 is parallel to the first track 341 and is located below the first track 341. It should be noted that the lower surface refers to the Figure 2 The arrow in the middle points to the surface in the direction of "down"; the vertical direction refers to Figure 2 The “vertical direction” indicated by the arrow in the middle; the “below” refers to the direction along Figure 2 The arrow in the middle indicates the direction of "downward"; the first track 341 and the second track 342 are correspondingly arranged. When the trolley system is applied to equipment such as a ship unloader, the first track 341 and the second track 342 can be tracks arranged along the extension direction of the rotating arm 21 of the ship unloader, so that the running trolley 30 can run along the rotating arm 21, wherein the extension direction of the rotating arm 21 is the running direction of the running trolley 30, and the running direction refers to the direction along Figure 1 、 Figure 4 The arrow in the middle indicates the “direction of operation”.

[0053] It should be noted that when the trolley system is applied to equipment such as ship unloaders, a material-grabbing device 100 is connected to the running trolley 30. When the force of the waves acts on the material-grabbing device 100 through the cabin 2 and is transmitted to the running trolley 30, the trolley will shake, which may cause the running trolley 30 to flip over, affecting the stability of the running trolley 30. The trolley system provided in this embodiment, by setting a reverse roller 333 to contact the lower surface of the second track 342, the reverse roller 333 drives the frame 301 to run along the second track 342, further ensuring the stability of the running trolley 30 in the running direction, and the reverse roller 333, the walking wheel 331 and the horizontal wheel 332 work together to make the force on the running trolley 30 more stable, ensuring that the trolley system will not overturn.

[0054] Specifically, the running trolley 30 further includes: a trolley traction device 500, which is connected to the frame 301 and is suitable for pulling the running trolley 30 to move along the running direction.

[0055] Specifically, the trolley traction device 500 includes: a pulley assembly; a traction rope 501, which passes around the pulley assembly and is connected to both sides of the running trolley 30 along the running direction, suitable for providing traction to the running trolley 30; a driving device 510, including a driving part 511 and a first rotating part 512, the driving part 511 drives the first rotating part 512 to rotate, the traction rope 501 is wound around the first rotating part 512, the traction rope 501 has a tensioned state of pressing the first rotating part 512 and a relaxed state of loosening the first rotating part 512, the first rotating part 512 is suitable for driving the traction rope 501 to move when the traction rope 501 is in the tensioned state; a tensioning device, which abuts against the traction rope 501, and the tensioning device is suitable for adjusting the traction rope 501 to switch between the tensioned state and the relaxed state.

[0056] It should be noted that the running direction refers to Figure 6 The middle arrow indicates the "running direction", and the running trolley moves along the running direction. The two sides of the running trolley 30 along the running direction refer to the two side faces of the running trolley 30 facing the two ends of the running direction; the traction rope 501 is wound around the first rotating part 512. When the traction rope 501 is in the tensioned state, the traction rope 501 is tightened and presses the first rotating part 512. There is an interaction force between the first rotating part 512 and the traction rope 501. The first rotating part 512 drives the traction rope 501 to move, thereby achieving traction of the running trolley 30. When the traction rope 501 is in the relaxed state, there is no interaction force between the traction rope 501 and the first rotating part 512, and the first rotating part 512 cannot drive the traction rope 501 to move.

[0057] It should be noted that when the trolley 30 encounters an obstacle during operation and cannot continue to move, if the traction rope 501 still exerts traction on the trolley 30, the traction rope 501 may break due to being in a stretched state for a long time, which is dangerous. Therefore, it is necessary to remove the traction force exerted by the traction rope 501 on the trolley 30 when the trolley 30 stops running. In the prior art, the presence or absence of traction in the traction rope 501 is controlled by starting and stopping the motor of the driving device. However, frequent starting and stopping of the motor makes the traction less stable and seriously affects the service life of the motor. The trolley 30 can be a trolley on a ship unloader, and the trolley 30 is connected to a material retrieving device 100. The obstacle encountered by the trolley 30 during operation can be difficult-to-remove materials encountered by the material retrieving device 100 during the digging process.

[0058] The trolley traction device provided in this embodiment is configured to have a tensioned state in which the traction rope 501 is pressed against the first rotating part 512 and a relaxed state in which the first rotating part 512 is released. The driving part 511 is configured to drive the first rotating part 512 to rotate. When the traction rope 501 is in the tensioned state, it is driven to rotate by the first rotating part 512. The tensioning device is configured to adjust the traction rope 501 to switch between the tensioned state and the relaxed state. When the tensioning device adjusts the traction rope 501 to the tensioned state, the first rotating part 512 drives the traction rope 501 to move, thereby pulling the running trolley 30 to run. When the tensioning device adjusts the traction rope 501 to the relaxed state, the first rotating part 512 cannot drive the traction rope 501 to move, and thus cannot provide traction for the running trolley 30, thereby realizing the adjustment of whether the traction rope 501 provides traction to the running trolley 30 by the tensioning device. In this process, the presence or absence of traction on the traction rope 501 can be realized by simply adjusting the tightness of the traction rope 501 by the tensioning device. The operation is convenient and there is no need to frequently start and stop the driving device 510, which is conducive to extending the service life of the driving device 510, saving costs, and effectively improving the stability of traction.

[0059] Preferably, the driving part 511 is a driving motor, and a reducer 513 is arranged between the driving motor and the first rotating part 512. The first rotating part 512 is installed on a fixed support. The driving motor is connected to the first rotating part 512 through the reducer 513, so that the rotation speed of the first rotating part 512 can be adjusted. The driving motor and the reducer 513 are widely used, highly reliable, and flexible to operate.

[0060] Preferably, the traction rope 501 is a steel wire rope, which has a firm structure and is stable and reliable.

[0061] Specifically, the tensioning device includes: a rotating rod 521, which is rotatably arranged on the external structure, and the two ends of the rotating rod 521 are arranged up and down and respectively abut against the traction rope 501. The rotating rod 521 adjusts the tightness of the traction rope 501 by rotating relative to the external structure. It should be noted that the up and down refers to Figure 6 When the trolley traction device is a trolley traction device of a ship unloader, the running trolley 30 runs along the track on the rotating arm 21 of the ship unloader, and the external structure is the structure on the rotating arm 21.

[0062] The trolley traction device provided in this embodiment realizes support between the two ends of the rotating rod 521 and the traction rope 501 by arranging the upper and lower ends of the rotating rod 521 to abut against the traction rope 501 respectively. By rotating the rotating rod 521 relative to the external structure, the degree of tightening of the traction rope 501 by the rotating rod 521 can be adjusted, thereby adjusting the tightness of the traction rope 501. The structure is simple and the operation is convenient.

[0063] Specifically, a first tensioning wheel 522 and a second tensioning wheel 523 are respectively provided at both ends of the rotating rod 521. The first tensioning wheel 522 is located relatively above the second tensioning wheel 523. The traction rope 501 is passed around the first tensioning wheel 522 and the second tensioning wheel 523. The traction rope 501 is located in the sliding grooves of the first tensioning wheel 522 and the second tensioning wheel 523, which reduces friction and prevents the traction rope 501 from falling out, thereby increasing the stability of the structure.

[0064] Specifically, the tensioning device further includes a tensioning drive unit 524, which is connected to the rotating rod 521 and is suitable for driving the rotating rod 521 to rotate. The rotation of the rotating rod 521 is driven by the tensioning drive unit 524, which is easy to operate and highly automated.

[0065] Preferably, the tensioning drive part 524 is a telescopic mechanism. As an embodiment, the tensioning drive part 524 is a hydraulic cylinder, which drives the rotating rod 521 to rotate in different directions by extending or retracting the telescopic rod of the hydraulic cylinder. Telescopic cylinders are relatively common, with reliable structure and simple operation. It can be understood that as an alternative embodiment, the tensioning drive part 524 can also be an electric push rod, which drives the rotating rod 521 to rotate in different directions by extending or retracting the electric push rod. The electric push rod is flexible to operate and low in cost.

[0066] Specifically, the trolley traction device further includes: a detection device, disposed in correspondence with the running trolley 30, adapted to detect the start and stop of the running trolley 30, and controlling the operation of the tensioning drive unit 524 upon detecting the stop of the running trolley 30 to switch the traction rope 501 to the relaxed state. It should be noted that when the running trolley 30 stops, in order to prevent the traction rope 501 from being in an overstretched state for a long period of time, it is necessary to switch the traction rope 501 to the relaxed state to ensure that the traction rope 501 no longer moves with the rotation of the first rotating unit 512, thereby removing the traction force in the traction rope 501.

[0067] The trolley traction device provided in this embodiment detects the start and stop of the running trolley 30 by setting a detection device, and controls the action of the tensioning drive part 524 when it is detected that the running trolley 30 stops, further ensuring that the traction rope 501 can be switched to the relaxed state in time, thereby improving the degree of automation and protecting the traction rope 501 from being broken.

[0068] Preferably, the detection device is a displacement sensor, which detects the position of the running trolley 30 through the position sensor, thereby determining whether the running trolley 30 has stopped. The displacement sensor is widely used and has high reliability.

[0069] Specifically, the pulley assembly includes: a first fixed pulley group 531 and a second fixed pulley group 532, which are respectively arranged at both ends of the running direction of the running trolley 30, suitable for fixing the position of the traction rope 501 and changing the direction of the traction rope 501. It should be noted that the running direction refers to Figure 6 The middle arrow indicates the "running direction"; the first fixed pulley group 531 and the second fixed pulley group 532 can be fixed on a fixed structure such as the rotating arm 21 or the main beam 20; the first fixed pulley group 531 and the second fixed pulley group 532 are arranged at opposite ends of the running direction of the running trolley 30, and the running trolley 30 moves back and forth between the first fixed pulley group 531 and the second fixed pulley group 532 under the traction of the traction rope 501.

[0070] Preferably, the first fixed pulley set 531 includes two adjacent fixed pulleys, and the second fixed pulley set 532 includes two fixed pulleys arranged at intervals, so as to support the traction rope 501 and redirect the traction rope 501 .

[0071] Specifically, the pulley assembly further includes:

[0072] A first redirecting wheel 533 is provided between the first tensioning wheel 522 and the second fixed pulley set 532. The traction rope 501 passes through the first fixed pulley set 531, the first redirecting wheel 533, the first tensioning wheel 522, and the second fixed pulley set 532 in sequence before being wound around the first rotating part 512.

[0073] The second redirecting wheel 534 is arranged on the side of the second tensioning wheel 523 away from the driving device 510. The traction rope 501 passes through the first rotating part 512, the second redirecting wheel 534, and the second tensioning wheel 523 in sequence and is connected to the running trolley 30.

[0074] It should be noted that the traction rope 501 in the trolley traction device provided in this embodiment is a steel wire rope. One end of the traction rope 501 is connected to the frame on the side of the running direction of the running trolley 30. After passing through the first fixed pulley set 531, the first redirecting pulley 533, the first tensioning pulley 522, the second fixed pulley set 532, the first rotating portion 512, the second redirecting pulley 534, and the second tensioning pulley 523, it is then connected to the frame on the other side of the running direction of the running trolley 30 to pull the running trolley 30 in the running direction. During the operation of the running trolley 30, the traction rope 501 in its forward direction is subjected to tension.

[0075] Specifically, the rotating rod 521 is rotationally connected to the external structure through a hinge 525, and the tensioning drive unit 524 drives the rotating rod 521 to rotate around the hinge 525 along a first rotation direction to loosen the traction rope 501; or, the tensioning drive unit 524 drives the rotating rod 521 to rotate around the hinge 525 along a second rotation direction to tension the traction rope 501.

[0076] It should be noted that the tensioning driving portion 524 is rotatably connected to the second rotating portion 526 on the rotating rod 521. Optionally, in combination with Figure 6As shown, the second rotating part 526 is arranged below the hinge point 525. When the telescopic rod of the tensioning drive part 524 is extended, the rotating rod 521 is driven to rotate clockwise around the hinge point 525, and the traction rope 501 is loosened and switched to the relaxed state; and when the telescopic rod of the tensioning drive part 524 is retracted, the rotating rod 521 is driven to rotate counterclockwise around the hinge point 525, and the traction rope 501 is tightened and switched to the tensioned state. It can be understood that, as an alternative embodiment, the second rotating part 526 can also be arranged above the hinge 525. When the telescopic rod of the tensioning driving part 524 is retracted, the rotating rod 521 is driven to rotate clockwise around the hinge 525, and the traction rope 501 is loosened and switched to the relaxed state; and when the telescopic rod of the tensioning driving part 524 is extended, the rotating rod 521 is driven to rotate counterclockwise around the hinge 525, and the traction rope 501 is tightened and switched to the tensioned state. Figure 6 The arrow in the middle refers to the direction of "down", and the arrow above refers to the direction of Figure 6 The middle arrow indicates the "up" direction; the first rotation direction is clockwise, and the second rotation direction is counterclockwise; when the trolley traction device is applied to a ship unloader, the external structure is the rotating arm 21 of the ship unloader.

[0077] Specifically, the first rotating portion 512 selectively rotates clockwise or counterclockwise to provide traction in different directions to the running trolley 30 via the traction rope 501. By providing the first rotating portion 512 with both clockwise and counterclockwise rotation, the direction of the traction force exerted by the traction rope 501 on the running trolley 30 can be changed simply by changing the rotation direction of the first rotating portion 512, thereby changing the running direction of the running trolley 30. This achieves a simple structure, convenient operation, and high work efficiency.

[0078] Specifically, the first rotating portion 512 is a friction cylinder, which is adapted to provide friction to the traction rope 501 when the traction rope 501 is in a tensioned state. It should be noted that the friction cylinder is made of a special material and is wound around a wire rope. When the wire rope is in a tensioned state, the friction cylinder is subjected to pressure from the wire rope, generating friction between the friction cylinder and the wire rope, thereby driving the wire rope in motion through rotation of the friction cylinder. When the wire rope is in a relaxed state, the pressure from the wire rope on the friction cylinder is zero, resulting in no friction between the friction cylinder and the wire rope. Consequently, the friction cylinder idles and the wire rope does not move. The friction cylinder serves to wind the wire rope and does not retract or release the wire rope.

[0079] Taking the application of the trolley traction device on a ship unloader as an example, the working process of the trolley traction device is described as follows:

[0080] Under normal working conditions, the running trolley 30 drives the material-grabbing device 100 to move back and forth in the ship width direction to perform material-grabbing operations. When the forward direction of the running trolley 30 is obstructed and stops moving, the detection device senses that the movement of the running trolley 30 has stopped, and then controls the action of the tensioning device, adjusts the tension of the traction rope 501, so that the traction rope 501 switches to a relaxed state, and the traction rope 501 and the first rotating part 512 do not generate friction. The first rotating part 512 idles, and there is no traction force on the traction rope 501, and the running trolley 30 cannot be pulled; when the tensioning device returns to a normal working posture, the traction rope 501 is tightened, and the first rotating part 512 relies on the friction between the traction rope 501 and the traction rope 501 to drive the traction rope 501 to move, thereby pulling the running trolley 30 to move. Among them, the process of the tensioning device restoring its normal working posture can rely on manual control, or a second detection device can be set to detect whether the obstruction to the running trolley 30 has been cleared. When the second detection device detects that the obstruction has been cleared, the tensioning device is controlled to restore its normal working posture to re-tension the traction rope 501.

[0081] Example 2

[0082] Combine Figure 1 As shown, this embodiment provides a ship unloader, including: the trolley system as described above.

[0083] Specifically, the ship unloader further includes a gantry body 10 , wherein the gantry body 10 has gantry legs 11 , and the gantry legs 11 are connected to the dock foundation 4 .

[0084] Specifically, the gantry body 10 also includes a main beam 20, and the main beam 20 includes a rotating arm 21 extending beyond the gantry leg 11. The rotating arm 21 is suitable for pitching and lowering. The running trolley 30 moves along the track on the rotating arm 21 under the traction of the trolley traction device. The running trolley 30 is connected to the material-retrieving device 100. When the rotating arm 21 is placed flat, the running trolley 30 drives the material-retrieving device 100 to move along the track on the rotating arm 21, so that the material-retrieving device 100 moves back and forth in the ship width direction to unload the materials in the cabin 2. Among them, the above refers to Figure 1 The arrow in the middle points to "up"; the width of the ship refers to Figure 1 The arrow in the middle points to the "ship width direction".

[0085] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A trolley system, characterized in that: The running trolley (30) includes: Frame (301); The wheel frame (320) comprises a first connecting portion (321) and a second connecting portion (322), wherein the first connecting portion (321) and the second connecting portion (322) are symmetrically arranged and are both rotatably connected to the vehicle frame (301), the first connecting portion (321) and the second connecting portion (322) are connected via an elastic member (323), and the lower ends of the first connecting portion (321) and the second connecting portion (322) are both provided with running wheels (331), and the running wheels (331) are suitable for rolling along a first track (341) to drive the vehicle frame (301) to run along the first track (341); The running trolley (30) further comprises: a trolley traction device (500), wherein the trolley traction device (500) is connected to the vehicle frame (301) and is suitable for traction of the running trolley (30) to move along the running direction; The trolley traction device (500) comprises: pulley assembly; A traction rope (501) passes around the pulley assembly and is connected to both sides of the running trolley (30) along the running direction, suitable for providing traction to the running trolley (30); A driving device (510) comprises a driving portion (511) and a first rotating portion (512), wherein the driving portion (511) drives the first rotating portion (512) to rotate, the traction rope (501) is wound around the first rotating portion (512), the traction rope (501) has a tensioned state in which the first rotating portion (512) is compressed, and a relaxed state in which the first rotating portion (512) is released, and the first rotating portion (512) is adapted to drive the traction rope (501) to move when the traction rope (501) is in the tensioned state; a tensioning device abutting against the traction rope (501), the tensioning device being suitable for adjusting the traction rope (501) to switch between the tensioned state and the relaxed state; The tensioning device comprises: a rotating rod (521) rotatably arranged on the external structure, with two ends of the rotating rod (521) arranged in an upper and lower position and respectively abutting against the traction rope (501), and the rotating rod (521) adjusts the tightness of the traction rope (501) by rotating relative to the external structure; The tensioning device further comprises: a tensioning driving portion (524), the tensioning driving portion (524) being connected to the rotating rod (521) and being suitable for driving the rotating rod (521) to rotate; The rotating rod (521) is rotatably connected to the external structure via a hinge point (525); The tensioning driving portion (524) is rotatably connected to the second rotating portion (526) on the rotating rod (521), and the second rotating portion (526) is arranged below the hinge point (525), or the second rotating portion (526) is arranged above the hinge point (525).

2. The trolley system according to claim 1, characterized in that: The elastic member (323) is arranged at the upper end of the wheel frame (320), and the first connecting portion (321) and the second connecting portion (322) are respectively hinged to the vehicle frame (301), with the hinge point being located relatively below the elastic member (323).

3. The trolley system according to claim 1, characterized in that: The number of the wheel frames (320) is at least two groups, and the at least two groups of wheel frames (320) are symmetrically arranged on both sides of the width direction of the vehicle frame (301).

4. The trolley system according to claim 1, characterized in that: The walking wheel (331) is in contact with the upper surface of the first track (341), and the running trolley (30) further includes a horizontal wheel (332), the horizontal wheel (332) is in rolling contact with the side of the first track (341), and the horizontal wheel (332) is suitable for rotating around an axis in a vertical direction.

5. The trolley system according to claim 4, characterized in that: The running trolley (30) further includes: a counter roller (333), the counter roller (333) being arranged opposite to the running wheel (331) in a vertical direction and suitable for contacting the lower surface of the second track (342), wherein the second track (342) is parallel to the first track (341) and is located below the first track (341).

6. The trolley system according to claim 1, characterized in that: A first tensioning wheel (522) and a second tensioning wheel (523) are respectively provided at both ends of the rotating rod (521); the first tensioning wheel (522) is located relatively above the second tensioning wheel (523); and the traction rope (501) is wound around the first tensioning wheel (522) and the second tensioning wheel (523).

7. The trolley system according to claim 1, characterized in that: The tensioning drive unit (524) drives the rotating rod (521) to rotate around the hinge point (525) in a first rotation direction to loosen the traction rope (501); or the tensioning drive unit (524) drives the rotating rod (521) to rotate around the hinge point (525) in a second rotation direction to tension the traction rope (501).

8. The trolley system according to claim 7, characterized in that: Also includes: A detection device is provided corresponding to the running trolley (30), and is suitable for detecting the start and stop of the running trolley (30), and controlling the tensioning drive unit (524) to operate when the running trolley (30) is detected to stop, so as to switch the traction rope (501) to the relaxed state.

9. A ship unloader, characterized in that: include: A trolley system as described in any one of claims 1 to 8 above.

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