Folding arm multi-connecting-rod mechanism

Abstract

The utility model provides a folding arm multi-connecting rod mechanism which is arranged on a portal crane, the portal crane comprises a portal frame, a fixed beam is arranged on the portal frame, a connecting part is arranged at the joint of the fixed beam and the portal frame, a moving device is arranged on one side of the fixed beam and comprises a moving beam, the fixed beam is rotatably connected with the moving beam, and the moving beam is connected with the portal frame. A driving device is arranged between the fixed beam and the movable beam and can drive the movable beam to rotate in the horizontal direction, a first mounting base is arranged on the outer side of the fixed beam, a first lug plate is arranged on the outer side of the movable beam, and the first mounting base and the first lug plate are detachably connected. The moving beam is easy to unfold to delay the fixed beam length.

Description

Technical Field

[0001] The utility model relates to the technical field of crane equipment, in particular to a folding arm multi-link mechanism. Background Art

[0002] In order to meet the lifting operations on the ship, a gantry crane is usually installed on the ship. The gantry crane includes a gantry and a trolley. A fixed beam is provided on the gantry for the trolley to move. The fixed beam enables the trolley to move along the width of the hull, and then perform cargo lifting operations. Under the premise of considering the navigation safety of the hull, the length of the fixed beam cannot exceed the width of the hull. Therefore, the lateral operating range of the trolley is limited to the width of the hull. However, after the ship docks, there is a need to lift containers to load or unload them to the shore. This requires a stretchable movable beam to be provided on the fixed beam. After the hull docks, the expansion of the movable beam can extend the fixed beam to an appropriate length, so that the lateral operating range of the trolley exceeds the width of the hull; when sailing, the movable beam is retracted so that the lateral operating range of the trolley is limited to the width of the hull.

[0003] Therefore, when extending the movable beam, the connection between the movable beam and the fixed beam needs to be firm, and retracting the movable beam will not affect the navigation safety of the hull.

[0004] For example, the patent application number is 202410507917.4, and the publication date is 2024.06.25. The patent document discloses a container gantry crane and a method of using the same, comprising a fixed rail frame and two groups of gantries, wherein the two groups of gantries are arranged in parallel transversely, the fixed rail frame is transversely fixed to the inner sides of the two groups of gantries, and one end of the fixed rail frame passes through the gantries, and the outer end of the fixed rail frame outside the gantries is hinged with a movable rail frame that can be flipped upward, and the top side of the gantries is fixed with a swing arm hydraulic cylinder that supports the movable rail frame to rotate and fold upward; the movable rail frame includes two parallel movable rails. By providing two groups of synchronously moving cantilevers as the supporting suspension structure of the corner grabbing pieces, the containers are alternately loaded and unloaded through the two groups of grabbing positions, thereby improving the cargo turnover efficiency; and by providing a rotatable support ring to support the cantilever, the cargo can be moved and loaded and unloaded at the same horizontal position without moving the entire crane, thereby meeting the container loading and unloading needs of large-area cargo yards or decks.

[0005] The above documents use a swing arm hydraulic cylinder to perform the upward folding and downward extension of the movable rail frame. When the movable rail frame is horizontally unfolded, the track is extended by the joint action of the movable ear on the movable rail frame and the fixed ear on the fixed rail frame, the movable rail and the fixed rail end abutting each other, and the swing arm hydraulic cylinder. When the movable rail frame is not needed, the movable rail frame needs to be stacked upward on the fixed rail, thereby increasing the thickness of the fixed rail, that is, the center of gravity of the fixed rail moves upward, making the stability of the fixed rail on the ship worse. In addition, when the movable rail frame is unfolded, the hydraulic cylinder needs to drive the movable rail frame to flip downward, so that the swing arm hydraulic cylinder drive is set at the upper end of the movable rail frame, so that after unfolding, the swing arm hydraulic drive plays a major pulling force on the movable rail frame. Under long-term action, the components in the swing arm hydraulic drive will be subjected to continuous pressure and wear, thereby accelerating the fatigue and aging of the swing arm hydraulic cylinder and shortening its service life. Summary of the Invention

[0006] The utility model provides a folding arm multi-link mechanism, which rotates the moving beam inwards, improves stability, and prolongs service life.

[0007] To achieve the above-mentioned purpose, the technical solution of the utility model is: a folding arm multi-link mechanism is arranged on a gantry crane, the gantry crane includes a gantry, two fixed beams are provided on the gantry, the connection between the fixed beams and the gantry is a connecting part, a moving device is provided on the inner side of the fixed beam, the moving device includes two moving beams, the fixed beam is rotatably connected to the moving beam, a driving device is provided between the fixed beam and the moving beam, the driving device drives the moving beam to rotate horizontally in the plane where the fixed beam is located, and the moving beam is located between the two fixed beams when folded.

[0008] When the cam is in a state of being moved along the horizontal axis, the cam is moved along the horizontal axis so that the cam can move relative to the fixed beam and move relative to the fixed beam, thereby realizing the retraction of the cam.

[0009] Furthermore, one or more second mounting seats are provided on the inner side of the connecting portion, one or more second ear plates are provided on the inner side of the movable beam, and pin shafts are provided in the second mounting seats and the second ear plates.

[0010] In the above arrangement, two second mounting seats are provided on the inner side of the connecting part to provide a connection position for the second ear plate on the moving beam. The second mounting seat and the second ear plate are connected by a pin shaft to complete the rotatable connection between the fixed beam and the moving beam. When the driving cylinder drives the moving beam to rotate, the moving beam rotates with the second mounting seat and the second ear plate as the fulcrum, and the second mounting seat bears the weight of the moving beam. Therefore, the driving device only needs to drive the moving beam to rotate in the horizontal direction, and bears less weight of the moving beam and the weight when the moving beam is used to lift the container. This can ensure the stability of the rotation of the moving beam, thereby reducing the operating load time of the driving device and extending its service life.

[0011] Furthermore, the driving device includes a driving cylinder, a connecting plate and a movable plate, one side of the driving cylinder is rotatably connected to a side of the fixed beam, one side of the driving cylinder output shaft is hinged to the connecting plate and the movable plate, the other side of the connecting rod is hinged to a side of the connecting part, and the other side of the movable rod is hinged to a side of the movable beam.

[0012] In the above arrangement, a driving cylinder is provided on one side of the fixed beam, and the output shaft of the driving cylinder is connected to the connecting plate and the movable plate. The output shaft of the driving cylinder can be extended and retracted in the driving cylinder, and the other side of the connecting plate is connected to a side of the connecting part, and the other side of the movable plate is connected to a side of the movable beam. When the output shaft of the driving cylinder is retracted, the connecting plate and the movable plate are driven to move, so that the movable beam is retracted inward; when the output shaft of the driving cylinder is extended, the connecting plate and the movable plate are driven to move, so that the movable beam is expanded outward.

[0013] Furthermore, there are more than two second mounting seats, and the two or more second mounting seats are spaced apart along the height direction of the connecting portion, and the driving device is arranged between the two second mounting seats.

[0014] In the above arrangement, the second mounting seat bears the weight of the movable beam, and the movable beam rotates with the second mounting seat as the fulcrum. A driving device is arranged between the two second mounting seats, which optimizes the layout of the driving device and makes full use of the space, so that when the driving device is running, it will not hinder the rotation of the movable beam, and the driving device is closer to the movable beam and the fixed beam, simplifying the components used to drive the movable beam to rotate.

[0015] Furthermore, the side of the moving beam away from the second ear plate is inclined toward the side of the moving beam close to the second ear plate.

[0016] In the above setting, one side of the movable beam is inclined toward the second ear plate, that is, the cross-sectional area of ​​the movable beam close to the second ear plate is larger than the cross-sectional area of ​​the other side of the movable beam. The side of the movable beam close to the second ear plate is the connection position between the movable beam and the fixed beam, which can effectively enhance the bearing capacity of the connection between the fixed beam and the movable beam. When the movable beam rotates, it will not contact the second ear plate on the other movable beam, so that the movable beam can rotate to the inside of the fixed beam.

[0017] Furthermore, when the movable beam rotates to the inner side of the fixed beam, the distance from one side surface of a movable beam to another side surface of the fixed beam is d1, and the length of the movable beam is less than d1.

[0018] The above setting controls the length of the movable beam so that when one movable beam is retracted, the vertical distance between the side of the movable beam and the fixed beam is d1. The length of the other movable beam should be less than d1, so that when the other movable beam is retracted, it will not contact the retracted movable beam. In order to allow the two movable beams to rotate smoothly to the inside of the fixed beam, the length of both movable beams should be less than d1.

[0019] Furthermore, the second mounting seat includes two second mounting plates protruding outward from the inner side of the connecting part, and an accommodating space is formed between the two second mounting plates. A second connecting ear is arranged in the accommodating space. The second mounting plate and the second connecting ear are provided with connecting holes, and a pin shaft is arranged in the connecting hole.

[0020] The above arrangement forms an accommodating space between the second mounting plates, so that the second connecting ear can be accommodated in the accommodating space, thereby enabling the second connecting ear to be accommodated in the accommodating space when the movable beam is folded, so that the movable beam can be accommodated more reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the main view of the utility model.

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 This is an exploded view of the driving device and the moving device in the utility model.

[0024] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0025] Figure 5 This is a top view of the connection between the movable beam and the fixed beam in the utility model.

[0026] Figure 6 This is a side view of the connection between the fixed beam and the movable beam in the present invention.

[0027] Figure 7 for Figure 6Enlarged view of point C in the middle.

[0028] Explanation of the accompanying reference numerals: 1-gantry; 11-fixed beam; 111-connecting portion; 1111-first mounting seat; 1112-second mounting seat; 11121-second mounting plate; 2-moving device; 21-moving beam; 22-first ear plate; 23-second ear plate; 231-connecting hole; 3-driving device; 31-driving cylinder; 311-output shaft; 32-connecting plate; 33-moving plate; DETAILED DESCRIPTION

[0029] like Figure 1-7 As shown, a folding arm multi-link mechanism is provided on a gantry crane, which includes a gantry 1, two fixed beams 11 are provided on the gantry 1, and the connection between the fixed beam 11 and the gantry 1 is a connecting portion 111. A moving device 2 is provided on the inner side of the fixed beam 11, and the moving device 2 includes two moving beams 21. Each fixed beam 11 is rotatably connected to each moving beam 21. A driving device 3 is provided between the fixed beam 11 and the moving beam 21. The driving device 3 can drive the moving beam 21 to rotate horizontally in the plane where the fixed beam is located. A first mounting seat 1111 is provided on the outer side of the fixed beam 11, and a first ear plate 22 is provided on the outer side of the moving beam 21. The first mounting seat 1111 and the first ear plate 22 are detachably connected. The moving beam 21 is provided on one side of the fixed beam 11, and the fixed beam 11 and the moving beam 21 are rotatably connected. The movable beam 21 is rotatably connected, and a driving device 3 is provided between the fixed beam 11 and the movable beam 21. The driving device 3 can make the movable beam 21 rotate horizontally relative to the fixed beam 11. When the driving device 3 drives the movable beam 21 to rotate until it is flush with one side of the fixed beam 11, it is in the expanded state. By connecting the first ear plate 22 and the first mounting seat 1111, such as using a fixed shaft to connect the first ear plate 22 and the first mounting seat 1111, the position of the movable beam 21 is locked to prevent accidental rotation and ensure that the movable beam 21 is in the expanded state; when the movable beam 21 needs to be rotated to the inside of the fixed beam 11, first remove the first ear plate 22 and the fixed shaft in the first mounting seat 1111, and then the driving device 3 drives the movable beam 21 to rotate horizontally inward to complete the retraction of the movable beam 21.

[0030] like Figure 1-2As shown, the driving device 3 includes a driving cylinder 31, a connecting plate 32 and a movable plate 33. One side of the driving cylinder 31 is hinged to one side of the fixed beam 11. One side of the output shaft 311 of the driving cylinder 31 is connected to the connecting plate 32 and the movable plate 33. The other side of the connecting plate 32 is connected to one side of the movable beam 21. The other side of the movable plate 33 is connected to one side of the movable beam 21. The driving cylinder 31 is provided on one side of the fixed beam 11. The output shaft 311 of the driving cylinder 31 is connected to the connecting plate 32 and the movable plate 33. In this embodiment, the output shaft 311 of the driving cylinder 31 is connected to one end of the connecting plate 21 and the movable plate One end of the plate 33 is hinged, the other end of the connecting plate 21 and the other end of the movable plate 33 are hinged to one side of the movable beam 21, the output shaft 311 of the driving cylinder 31 can be extended and retracted in the driving cylinder 31, the other side of the connecting plate 32 is connected to one side of the movable beam 21, and the other side of the movable plate 33 is connected to one side of the movable beam 21. When the output shaft 311 of the driving cylinder 31 is retracted, the connecting plate 32 and the movable plate 33 are driven to move, so that the movable beam 21 is retracted inward; when the output shaft 311 of the driving cylinder 31 is extended, the connecting plate 32 and the movable plate 33 are driven to move, so that the movable beam 21 is expanded outward.

[0031] like Figure 3-7 As shown, one or more second mounting seats 1112 are provided on the inner side of the connecting portion 111, and one or more second ear plates 23 are provided on the inner side of the moving beam 21. The second mounting seats 1112 are rotatably connected to the second ear plates 23. Two second mounting seats 1112 are provided on the inner side of the connecting portion 111 to provide connection positions for the second ear plates 23 on the moving beam 21. The second mounting seats 1112 and the second ear plates 23 are connected by pins to complete the rotational connection between the fixed beam 11 and the moving beam 21. When the driving cylinder 31 drives the moving beam 21 to rotate, the moving beam 21 rotates with the second mounting seats 1112 and the second ear plates 23 as fulcrums, and the second mounting seats 1112 bear the weight of the moving beam 21. Therefore, the driving device 3 only needs to drive the moving beam 21 to rotate in the horizontal direction, without bearing the weight of the moving beam 21 and the weight when the moving beam 21 is used to lift the container. This can ensure the stability of the rotation of the moving beam 21, thereby reducing the operating load time of the driving device 3 and extending its service life.

[0032] The driving device 3 is arranged between the two second mounting seats 1112. The second mounting seat 1112 mainly bears the weight of the moving beam 21, and the moving beam 21 rotates with the second mounting seat 1112 as the fulcrum. The driving device 3 is arranged between the two second mounting seats 1112 to optimize the layout of the driving device 3 and make full use of the space, so that when the driving device 3 is running, it will not hinder the rotation of the moving beam 21, and the driving device 3 is closer to the moving beam 21 and the fixed beam 11, simplifying the components used to drive the moving beam 21 to rotate.

[0033] like Figure 3As shown, there are more than two second mounting seats 1112, and the more than two second mounting seats 1112 are spaced apart along the height direction of the connecting portion. The second mounting seat 1112 includes two parallel second mounting plates 11121, and an accommodating space is formed between the two second mounting plates 11121. The second connecting ear 23 is accommodated in the accommodating space. A connecting hole 231 is provided on the second mounting plate 11121 and the second connecting ear 23, and a pin shaft passes through the connecting hole 231 to realize a rotational connection between the second mounting seat 1112 and the second connecting ear 23.

[0034] The side of the moving beam 21 away from the first ear plate 22 is inclined toward the side close to the first ear plate 22, that is, the cross-sectional area of ​​the side of the moving beam 21 close to the first ear plate 22 is larger than the cross-sectional area of ​​the other side of the moving beam 21. The side of the moving beam 21 close to the first ear plate 22 is the connection position between the moving beam 21 and the fixed beam 11, which can effectively enhance the bearing capacity of the connection between the fixed beam 11 and the moving beam 21, and the height of one side of the moving beam 21 is higher than the height of the first ear plate 22. When the moving beam 21 rotates, it will not contact the first ear plate 22 on the other moving beam 21, so that the moving beam 21 can rotate to the inside of the fixed beam 11.

[0035] The movable beam 21 rotates to the inner side of the fixed beam 11, and the distance from one side of the movable beam 21 to the side of the other fixed beam 11 is d1. The length of the movable beam 21 is less than d1. The length of the movable beam 21 is controlled so that when one movable beam 21 is retracted, the vertical distance between the side of the movable beam 21 and the fixed beam 11 is d1. The length of the other movable beam 21 should be less than d1 so that when the other movable beam 21 is retracted, it will not contact the retracted movable beam 21. In order to ensure that the two movable beams 21 can rotate smoothly to the inner side of the fixed beam 11, the lengths of the two movable beams 21 should be less than d1.

[0036] When the cam 31 is in the unlock state, the first lug 22 and the first mounting seat 1111 are connected, and the driving cylinder 31 is stopped working.

[0037] When it is necessary to retract the movable beam 21, remove the first ear plate 22 and the fixed shaft in the first mounting seat 1111, and extend the output shaft 311 of the driving cylinder 31 to drive the connecting plate 32 and the movable plate 33 to move. The movable beam 21 rotates inward to the inner side of the fixed beam 11. At this time, the driving cylinder 31 needs to continue working to maintain the position of the movable beam 21 and complete the retraction of the movable beam 21.

Claims

1. A folding arm multi-link mechanism is provided on a gantry crane, wherein the gantry crane includes a gantry, and the gantry is provided with two fixed beams, wherein the connection between the fixed beams and the gantry is a connecting portion, and wherein: A moving device is provided on the inner side of the fixed beam, and the moving device includes two moving beams. The fixed beam is rotatably connected to the moving beam. A driving device is provided between the fixed beam and the moving beam. The driving device can drive the moving beam to rotate horizontally in the plane where the fixed beam is located. When the moving beam is folded, it is located between the two fixed beams.

2. The folding arm multi-link mechanism according to claim 1, characterized in that: One or more second mounting seats are provided inside the connecting portion, one or more second ear plates are provided inside the movable beam, and pin shafts are provided inside the second mounting seats and the second ear plates.

3. The folding arm multi-link mechanism according to claim 1, characterized in that: The driving device includes a driving cylinder, a connecting plate and a movable plate. One side of the driving cylinder is connected to a side of a fixed beam, one side of the driving cylinder output shaft is hinged to the connecting plate and the movable plate, the other side of the connecting plate is hinged to a side of the connecting part, and the other side of the movable plate is hinged to a side of the movable beam.

4. The folding arm multi-link mechanism according to claim 2, characterized in that: There are two or more second mounting seats, which are spaced apart along the height direction of the connecting portion, and the driving device is arranged between the two second mounting seats.

5. The folding arm multi-link mechanism according to claim 1, characterized in that: The side of the moving beam away from the second ear plate is inclined toward the side of the moving beam close to the second ear plate.

6. The folding arm multi-link mechanism according to claim 1, characterized in that: The movable beam rotates to the inner side of the fixed beam, and the distance from one side of the movable beam to another side of the fixed beam is d1. The length of the movable beam is less than d1.

7. The folding arm multi-link mechanism according to claim 2, characterized in that: The second mounting seat includes two second mounting plates protruding outward from the inner side of the connecting part, and an accommodating space is formed between the two second mounting plates. A second connecting ear is arranged in the accommodating space. The second mounting plate and the second connecting ear are provided with connecting holes, and a pin shaft is arranged in the connecting hole.

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