Movable wharf ladder convenient to disassemble and maintain

Abstract

The application discloses a movable wharf ladder convenient to disassemble, assemble and maintain, which comprises a first ladder, a limiting column is fixed to the top of a moving plate, a plug hole is formed in the limiting column, a locking mechanism is movably connected in the first ladder, an electric telescopic rod is fixed to the bottom of a second ladder, a third ladder is fixed to the bottom of the electric telescopic rod, and a second cushion block is fixed to the bottom of the third ladder. The movable wharf ladder convenient to disassemble, assemble and maintain is characterized in that the first round gear and the lead screw are used in combination to drive the sleeve and the moving plate to move downward as a whole, the wheels are conveniently lowered, the swivel ring, the extrusion plate and the pushing block are used in combination to extrude the movable block and the bolt to move, the bolt is finally inserted into the plug hole, the locking effect is conveniently achieved, the wheels can assist the movement of the device, the moving plate and the sleeve are detachable, when the wheels are out of order, the bolts can be loosened to detach the moving plate, the wheels and the limiting column, the maintenance is facilitated, and the replacement cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of ship-related technology, specifically to a movable dock ladder that is easy to disassemble and maintain. Background Technology

[0002] In recent years, with the rapid development of global economic and trade integration, the volume of passenger and cargo maritime transport has shown a rapid growth trend worldwide. As a result, various port facilities have emerged at major passenger and cargo terminals. Among them, the pier ladder is a facility installed on the pier facade to allow crew members of small vessels and pier maintenance workers to go up and down the pier.

[0003] Existing dock ladders generally do not have rollers, making them heavy and difficult to move. Using a crane to move the dock ladder would result in high transportation costs. Furthermore, the length of dock ladders is generally fixed, making it difficult to flexibly adjust the length according to specific needs. Therefore, a movable dock ladder that is easy to disassemble and maintain is proposed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a mobile dock ladder that is easy to disassemble and maintain, in order to solve the problems mentioned in the background art, such as existing dock ladders generally not being equipped with rollers, dock ladders being relatively heavy and difficult to move and transport, dock ladders being relatively expensive to transport using cranes, and dock ladders generally having a fixed length, making it difficult to flexibly adjust the length of the ladder according to specific needs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a movable dock ladder that is easy to disassemble and maintain, comprising a first ladder, a first pad fixed to the bottom of the first ladder, a second ladder rotatably connected to the top of the first ladder via a pivot, a support platform fixed to one side of the first ladder, the second ladder resting on the support platform, a storage groove at the bottom of the first ladder, a drive lifting mechanism movably connected within the storage groove, a sleeve threaded to the bottom of the drive lifting mechanism, a movable plate fixed to the bottom of the sleeve by bolts, a roller fixed to the bottom of the movable plate, a limit post fixed to the top of the movable plate, an insertion hole on the limit post, a locking mechanism movably connected within the first ladder, an electric telescopic rod fixed to the bottom of the second ladder, a third ladder fixed to the bottom of the electric telescopic rod, and a second pad fixed to the bottom of the third ladder.

[0006] Preferably, the driving lifting mechanism includes a first motor and a rotating ring, and the first motor is fixed in the receiving groove. The bottom of the first motor is connected to an incomplete gear, and a first spur gear is meshed with one side of the incomplete gear. A lead screw is fixed to the bottom of the first spur gear, and a sleeve is threaded to the outside of the lead screw. The rotating ring is rotatably connected in an annular groove, and the annular groove is opened in the first ladder. A first rack is fixed on the inner wall of the rotating ring, and the first racks are evenly distributed on the rotating ring. An extrusion plate is fixed to the bottom of the rotating ring.

[0007] By adopting the above technical solution, the counterclockwise rotation of the first sprocket can drive the first sprocket and the rotating ring to rotate in turn, which makes it convenient to lower the roller first and then lock the moving plate.

[0008] Preferably, there are four extrusion plates, and the four extrusion plates are centrally symmetrically distributed on the rotating ring.

[0009] By adopting the above technical solution, the extrusion plate exerts a squeezing effect on the movable column.

[0010] Preferably, the locking mechanism includes a movable column and a movable block, with the movable column slidably connected inside the first ladder, the movable column being in contact with the bottom of the rotating ring, and the movable column and the pressing plate being arranged in a one-to-one correspondence. A pushing block is fixed to the bottom of the movable column, and the movable block is slidably connected inside the first ladder, with the bottom of the movable block being in contact with the bottom of the pushing block.

[0011] By adopting the above technical solution, the movable column will move downward when it is squeezed by the extrusion plate, thereby driving the push block to move, and the push block will push the movable block away.

[0012] Preferably, the movable block is connected to the first ladder by a compression spring, and a pin is fixed on the outside of the movable block, with the compression spring wrapped around the outside of the pin.

[0013] By adopting the above technical solution, the pin can be locked into the limiting post after being squeezed and inserted into the socket.

[0014] Preferably, the third ladder forms a telescopic structure with the second ladder via an electric telescopic rod, and a sleeve plate is fixed to the bottom of the second ladder, through which the third ladder passes.

[0015] By adopting the above technical solution, the third ladder is retractable, which makes it convenient to extend the second ladder.

[0016] Preferably, a groove is provided in the top of the first ladder, and a second motor is fixed in the groove. The output end of the second motor is connected to a second spur gear. The rotating shaft passes through the first ladder and is connected to the second ladder. A second rack is fixed on the outside of the rotating shaft. The second rack is meshed with one side of the second spur gear and is evenly distributed circumferentially on the rotating shaft.

[0017] By adopting the above technical solution, the rotation of the second circular gear can drive the rotation of the shaft, making it convenient to flip the second ladder.

[0018] Preferably, handrails are symmetrically fixed on both sides of the upper surface of the first ladder and both sides of the upper surface of the second ladder.

[0019] By adopting the above technical solutions, handrails can assist people in climbing ladders.

[0020] Preferably, a battery pack is fixed inside the first ladder, and the battery pack is electrically connected to a first motor, a second motor, and an electric telescopic rod.

[0021] By adopting the above technical solution, the battery pack can power the entire device.

[0022] Compared with the prior art, the beneficial effects of the present invention are: this movable dock ladder is easy to disassemble and maintain.

[0023] (1) The present invention can achieve the purpose of convenient movement and disassembly and maintenance. The rotation of the incomplete gear can drive the first spur gear and the rotating ring to rotate in sequence. The first spur gear and the lead screw can drive the sleeve and the moving plate to move downward as a whole, which makes it convenient to lower the roller. The rotating ring, the pressing plate and the pushing block can press the moving block and the pin to move. The pin is finally inserted into the insertion hole, which makes it convenient to achieve the locking effect. The roller can assist the movement of the device. The moving plate and the sleeve are detachable. When the roller fails, the bolts can be loosened to remove the moving plate, the roller and the limiting post, which makes maintenance convenient and reduces the replacement cost.

[0024] (2) The present invention can achieve the effect of telescopic movement. The third ladder can move under the extension action of the electric telescopic rod, which facilitates the extension of the second ladder. At the same time, the extension length of the third ladder can be adjusted according to the needs.

[0025] (3) The present invention can achieve the effect of flipping. Before moving the device with rollers, the second ladder needs to be flipped up. After moving the device to the required location with rollers and stabilizing the device with rollers, the second ladder can be flipped down. Attached Figure Description

[0026] Figure 1 This is a frontal cross-sectional view of the present invention.

[0027] Figure 2 This is a front view of the external structure of the present invention;

[0028] Figure 3 This is a top view cross-sectional structural diagram of the present invention;

[0029] Figure 4 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0030] Figure 5 This is a schematic diagram of the connection structure of the first ladder, storage groove, incomplete gear, first spur gear, swivel ring and first rack of the present invention;

[0031] Figure 6 This is a schematic diagram of the connection structure of the first ladder, the first pad, the storage groove, the movable plate, the bolts, and the rollers of the present invention.

[0032] Figure 7 This is a schematic diagram of the connection structure of the rotating ring, the first toothed rack, and the extrusion plate of the present invention.

[0033] In the diagram: 1. First ladder; 2. First pad; 3. Storage slot; 4. Drive lifting mechanism; 401. First motor; 402. Incomplete gear; 403. First spur gear; 404. Lead screw; 405. Rotary ring; 406. Annular groove; 407. First rack; 408. Extrusion plate; 5. Sleeve; 6. Moving plate; 7. Bolt; 8. Roller; 9. Limiting post; 10. Insertion hole; 11. Locking mechanism ; 1101, Movable column; 1102, Push block; 1103, Movable block; 1104, Compression spring; 1105, Pin; 12, Groove; 13, Second motor; 14, Second spur gear; 15, Rotating shaft; 16, Second rack; 17, Second ladder; 18, Support platform; 19, Handrail; 20, Electric telescopic rod; 21, Third ladder; 22, Sleeve plate; 23, Second pad block; 24, Battery pack. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-7 This invention provides a technical solution: a movable dock ladder that is easy to disassemble and maintain, such as... Figure 1 and Figure 3As shown, the device includes a first ladder 1, with a first pad 2 fixed at the bottom. A second ladder 17 is rotatably connected to the top of the first ladder 1 via a rotating shaft 15. A groove 12 is provided in the top of the first ladder 1, and a second motor 13 is fixed in the groove 12. The output end of the second motor 13 is connected to a second spur gear 14. The rotating shaft 15 passes through the first ladder 1 and is connected to the second ladder 17. A second rack 16 is fixed to the outside of the rotating shaft 15. The second rack 16 is meshed with one side of the second spur gear 14 and is evenly distributed circumferentially on the rotating shaft 15. The second spur gear 14 can rotate under the action of the second motor 13. Since the second spur gear 14 and the second rack 16 are meshed together, the rotating shaft 15 will rotate with the rotation of the second spur gear 14, thereby driving the second ladder 17 to rotate. Before moving the device, the second ladder 17 needs to be rotated. After moving the device, the second ladder 17 can be rotated down.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a support platform 18 is fixed on one side of the first ladder 1, and the second ladder 17 is placed on the support platform 18. Handrails 19 are symmetrically fixed on both sides of the upper surface of the first ladder 1 and both sides of the upper surface of the second ladder 17. During the process of climbing the first ladder 1 and the second ladder 17, one can hold onto the handrails 19 for easy assistance in climbing.

[0037] like Figure 1 , Figure 4 , Figure 5 and Figure 7As shown, the bottom of the first ladder 1 has a storage groove 3, and a drive lifting mechanism 4 is movably connected in the storage groove 3. The drive lifting mechanism 4 includes a first motor 401 and a rotating ring 405. The first motor 401 is fixed in the storage groove 3. The bottom of the first motor 401 is connected to an incomplete gear 402, and a first spur gear 403 is meshed on one side of the incomplete gear 402. A lead screw 404 is fixed to the bottom of the first spur gear 403, and a sleeve 5 is threaded to the outer side of the lead screw 404. The rotating ring 405 is rotatably connected in an annular slide groove 406, which is opened in the first ladder 1. A first rack 407 is fixed on the inner wall of the rotating ring 405, and the first racks 407 are evenly distributed on the rotating ring 405. A pressing plate 408 is fixed at the bottom. The incomplete gear 402 can rotate under the action of the first motor 401, thereby driving the first spur gear 403 to rotate, which in turn drives the lead screw 404 to rotate. At this time, the sleeve 5 can slide up and down under the limiting action of the lead screw 404 and the storage groove 3, thereby driving the moving plate 6 to move up and down, making it convenient to use or retract the roller 8. After the roller 8 is lowered, the incomplete gear 402 meshes with the first rack 407. The rotating ring 405 will rotate with the rotation of the incomplete gear 402. The annular groove 406 plays a limiting role on the rotating ring 405. The pressing plate 408 presses the movable column 1101 downward, and the pin 1105 is finally inserted into the insertion hole 10 to lock the limiting column 9, thus fixing the moving plate 6.

[0038] Furthermore, four extrusion plates 408 are provided, and the four extrusion plates 408 are centrally symmetrically distributed on the rotating ring 405. Each extrusion plate 408 can be used to extrude a movable column 1101, so that the four movable columns 1101 can move downwards simultaneously.

[0039] like Figure 1 , Figure 4 and Figure 6As shown, a sleeve 5 is threadedly connected to the bottom of the driving lifting mechanism 4. A movable plate 6 is fixed to the bottom of the sleeve 5 by bolts 7. A roller 8 is fixed to the bottom of the movable plate 6. A limit post 9 is fixed to the top of the movable plate 6. An insertion hole 10 is provided on the limit post 9. A locking mechanism 11 is movably connected inside the first ladder 1. The locking mechanism 11 includes a movable post 1101 and a movable block 1103. The movable post 1101 is slidably connected inside the first ladder 1. The movable post 1101 is in contact with the bottom of the rotating ring 405. The movable column 1101 and the pressing plate 408 are set one-to-one. The bottom of the movable column 1101 is fixed with a push block 1102. The movable block 1103 is slidably connected in the first ladder 1, and the bottom of the movable block 1103 is in contact with the bottom of the push block 1102. After the movable plate 6 is lowered, the rotating ring 405 will rotate with the rotation of the incomplete gear 402. The movable column 1101 moves downward under the pressing action of the pressing plate 408, and the push block 1102 moves downward accordingly, which makes it easier to push open the movable block 1103.

[0040] Furthermore, the movable block 1103 is connected to the first ladder 1 via a compression spring 1104, and a pin 1105 is fixed on the outside of the movable block 1103. The compression spring 1104 wraps around the outside of the pin 1105. After the movable block 1103 is pushed open by the push block 1102, the pin 1105 moves and eventually inserts into the socket 10, which facilitates locking the limit post 9. After the rotating ring 405 rotates, the movable block 1103 will automatically reset under the action of the compression spring 1104.

[0041] like Figure 1 and Figure 2 As shown, an electric telescopic rod 20 is fixed to the bottom of the second ladder 17, and a third ladder 21 is fixed to the bottom of the electric telescopic rod 20. A second pad 23 is fixed to the bottom of the third ladder 21. The third ladder 21 and the second ladder 17 form a telescopic structure through the electric telescopic rod 20. A sleeve plate 22 is fixed to the bottom of the second ladder 17, and the third ladder 21 passes through the sleeve plate 22. The third ladder 21 can move under the extension of the electric telescopic rod 20, which facilitates the extension of the second ladder 17. The electric telescopic rod 20 can be retracted to fold up the third ladder 21 for easy storage. The sleeve plate 22 plays a supporting and limiting role for the third ladder 21.

[0042] like Figure 1 As shown, a battery pack 24 is fixed inside the first ladder 1, and the battery pack 24 is electrically connected to the first motor 401, the second motor 13 and the electric telescopic rod 20. The battery pack 24 can convert DC power into AC power under the action of the inverter to supply the entire device, thereby ensuring the normal operation of the device.

[0043] Working principle: When using this easy-to-disassemble and maintain movable dock ladder, the second sprocket 14 rotates, thereby driving the rotating shaft 15 to rotate, which in turn drives the second ladder 17. Then, the incomplete gear 402 rotates, first driving the first sprocket 403 to rotate, and the lead screw 404 to rotate, thereby driving the sleeve 5, the moving plate 6, the roller 8, and the limiting post 9 to move downward as a whole. After the roller 8 contacts the ground and pushes up the first pad 2, the insertion hole 10 aligns with the pin 1105. The incomplete gear 402 then drives the rotating ring 405 to rotate, and the movable post 1101 moves downward under the pressure of the pressing plate 408. The movable block 1103 moves under the squeezing action of the push block 1102, and the pin 1105 is inserted into the corresponding socket 10 to lock the movable plate 6. After the device is moved to the desired location by the roller 8, the above operation is repeated in reverse to retract the roller 8 and stabilize the device. At the same time, the second ladder 17 can be rotated down. The third ladder 21 can be moved under the extension action of the electric telescopic rod 20, so as to facilitate the adjustment of the usable length of the third ladder 21 as needed. The second pad block 23 serves as a support for the third ladder 21. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0044] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A movable dock ladder that is easy to disassemble and maintain, comprising a first ladder (1), a first pad (2) fixed to the bottom of the first ladder (1), a second ladder (17) rotatably connected to the top of the first ladder (1) via a pivot (15), a support platform (18) fixed to one side of the first ladder (1), and the second ladder (17) resting on the support platform (18), characterized in that: The bottom of the first ladder (1) is provided with a receiving groove (3), a driving lifting mechanism (4) is movably connected in the receiving groove (3), the bottom of the driving lifting mechanism (4) is threadedly connected with a sleeve (5), the bottom of the sleeve (5) is fixedly connected with a moving plate (6) through a bolt (7), the bottom of the moving plate (6) is fixedly connected with a roller (8), the top of the moving plate (6) is fixedly connected with a limiting column (9), a insertion hole (10) is formed in the limiting column (9), a locking mechanism (11) is movably connected in the first ladder (1), the bottom of the second ladder (17) is fixedly connected with an electric telescopic rod (20), the bottom of the electric telescopic rod (20) is fixedly connected with a third ladder (21), the bottom of the third ladder (21) is fixedly connected with a second cushion block (23). The driving lifting mechanism (4) comprises a first motor (401) and a rotating ring (405), the first motor (401) is fixed in the receiving groove (3), the bottom of the first motor (401) is connected with an incomplete gear (402), one side of the incomplete gear (402) is meshedly connected with a first circular gear (403), the bottom of the first circular gear (403) is fixedly connected with a lead screw (404), the outer side of the lead screw (404) is threadedly connected with the sleeve (5), the rotating ring (405) is rotatably connected in an annular sliding groove (406), the annular sliding groove (406) is formed in the first ladder (1), the inner wall of the rotating ring (405) is fixedly connected with a first rack (407), the first racks (407) are equidistantly distributed on the rotating ring (405), the bottom of the rotating ring (405) is fixedly connected with an extrusion plate (408). The extrusion plate (408) is provided with four, and the four extrusion plates (408) are centrally symmetrically distributed on the rotating ring (405). The locking mechanism (11) comprises a movable column (1101) and a movable block (1103), the movable column (1101) is slidably connected in the first ladder (1), the movable column (1101) is in close contact with the bottom of the rotating ring (405), and the movable column (1101) is correspondingly arranged with the extrusion plate (408), the bottom of the movable column (1101) is fixedly connected with a pushing block (1102), the movable block (1103) is slidably connected in the first ladder (1), and the movable block (1103) is in close contact with the bottom of the pushing block (1102). The movable block (1103) is connected with the first ladder (1) through a compression spring (1104), and the outer side of the movable block (1103) is fixedly connected with a bolt (1105), and the compression spring (1104) is wrapped outside the bolt (1105).

2. The portable pier ladder of easy maintenance according to claim 1, characterized in that: The third ladder (21) and the second ladder (17) constitute a telescopic structure through the electric telescopic rod (20), the bottom of the second ladder (17) is fixedly connected with a sleeve plate (22), and the third ladder (21) penetrates through the sleeve plate (22).

3. The portable pier ladder of claim 1, wherein: The first ladder (1) is provided with a groove (12) in the top, and a second motor (13) is fixed in the groove (12); the output end of the second motor (13) is connected with a second circular gear (14); the rotating shaft (15) penetrates through the first ladder (1) and is connected with a second ladder (17); the outer side of the rotating shaft (15) is fixed with a second rack (16); the second rack (16) is connected with the second circular gear (14) on one side in a meshing mode; and the second rack (16) is uniformly distributed on the rotating shaft (15) in a circumferential direction.

4. The portable pier ladder of easy maintenance according to claim 1, characterized in that: The two sides of the upper end surface of the first ladder (1) and the two sides of the upper end surface of the second ladder (17) are symmetrically fixed with handrails (19).

5. The portable pier ladder of easy maintenance according to claim 3, characterized in that: The first ladder (1) is fixed with a battery pack (24), and the battery pack (24) is electrically connected with a first motor (401), a second motor (13) and an electric telescopic rod (20).

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