Automatic pawl turn lock device

Abstract

The application discloses an automatic pawl rotating lock device, which comprises a box body, a rack, a pinion, a pawl mechanism and an incomplete gear mechanism; the rack is located in the box body, the upper end and the lower end of the rack respectively pass through the top and the bottom of the box body, and the upper end of the rack is connected with a connecting rod on an ultra-high rack; the pinion is located in the box body and is engaged with the rack; the pawl mechanism is located in the box body and is arranged on the pinion and is engaged with the incomplete gear mechanism; an output shaft is arranged on the incomplete gear mechanism, and the output shaft is connected with a rotating lock mechanism; the application greatly facilitates the hoisting of the ultra-high container, simplifies the manufacturing repeatability and is more suitable for the requirements of an automatic wharf.

Description

Technical Field

[0001] This invention relates to components of container cranes, and more specifically, to an automatic pawl lock device. Background Technology

[0002] To meet the lifting requirements of various ports for ultra-high containers, ultra-high frames are often connected below the spreader, and the opening and closing functions of the ultra-high frame are controlled by controlling the twist lock function of the spreader.

[0003] Combination Figure 8 As shown, the automatic hook-type high beam 300 needs to switch between two stations on the base frame 301 to make the hook 302 hook onto or detach from the lifting lug 303 of the spreader. When the hook 302 hooks onto the spreader 304, the opening and closing of the high beam 300 is completed by controlling the spreader pivot pin.

[0004] However, the main problem with the existing design is:

[0005] 1) A base frame is required to connect the overhead hooks to the lifting lugs of the spreader;

[0006] 2) The opening and closing of the super-elevation frame needs to be controlled by controlling the lifting device pivot pin. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an automatic pawl lock device, which will greatly facilitate the hoisting of ultra-high containers, simplify the repetitive operation, and be more suitable for the requirements of automated terminals.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An automatic pawl rotary lock device includes a housing, a rack, a gear shaft, a pawl mechanism, and an incomplete gear mechanism;

[0010] The rack is located inside the housing, with its upper and lower ends passing through the top and bottom of the housing, respectively. The upper end of the rack is connected to a connecting rod on the super-high frame.

[0011] The gear shaft is located inside the housing and meshes with the rack;

[0012] The ratchet mechanism is located inside the housing and is mounted on the gear shaft, meshing with the incomplete gear mechanism;

[0013] The incomplete gear mechanism is provided with an output shaft, which is connected to a rotary lock mechanism.

[0014] Preferably, the pawl mechanism includes an inner pawl;

[0015] The inner hole of the inner pawl is fitted onto the gear shaft, and the inner hole is provided with a pawl and a ratchet tooth. The outer circle of the inner pawl is configured as an incomplete gear.

[0016] Preferably, the incomplete gear mechanism includes a driven gear;

[0017] The outer circle of the driven wheel is configured as an incomplete gear;

[0018] The output shaft is connected to the inner hole of the driven wheel.

[0019] Preferably, the outer circle of the inner pawl is provided with a locking arc, and the outer circle of the driven wheel is provided with a locking concave arc;

[0020] The locking arc and the locking concave arc are engaged.

[0021] Ideally, it should also include a positioning mechanism;

[0022] The positioning mechanism includes a sleeve, an adjusting bolt, a spring, and a steel ball;

[0023] The sleeve is provided on the box body;

[0024] The spring is disposed inside the sleeve;

[0025] The adjusting bolt is located at the top of the sleeve and contacts the upper end of the spring;

[0026] The steel ball is located at the bottom of the sleeve and contacts the lower end of the spring;

[0027] The steel ball also contacts the outer circular surface of the inner pawl.

[0028] Preferably, the outer circumference of the inner pawl is provided with a plurality of equidistant spherical grooves;

[0029] The spherical groove is adapted to the steel ball.

[0030] Preferably, the locking concave arc has two lines, which are symmetrically arranged at 180° on the outer circle of the driven wheel.

[0031] This invention provides an automatic ratchet-lock device that greatly facilitates the lifting of oversized containers. Each time, the container is automatically picked up or lowered simply by lowering or lifting it. This eliminates the need for a base frame, reducing the number of components and significantly lowering costs. No manual operation is required for opening and closing the locks; instead, the process is automatic during each container placement and lifting operation. This simplifies operation, reduces repetitive tasks, and is more suitable for automated terminals. The automatic ratchet-lock device is driven by the weight of the oversized container when connected, locking the lock pins and connecting the container. When lifted, the ratchet maintains the locked state, allowing the container to be moved to a designated location. When the container is placed in the designated location, the same working principle is repeated, with the device unlocking the lock pins due to the weight of the container, separating the container and allowing the device to pick up the next container. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the automatic ratchet rotary lock device of the present invention;

[0033] Figure 2 yes Figure 1 A diagram showing the view from below;

[0034] Figure 3 This is a schematic diagram of the pawl mechanism in the automatic pawl rotary lock device of the present invention;

[0035] Figure 4 This is a schematic diagram of the incomplete gear mechanism in the automatic ratchet rotary lock device of the present invention;

[0036] Figure 5 This is a schematic diagram of the positioning mechanism in the automatic pawl rotary locking device of the present invention;

[0037] Figure 6 yes Figure 5 A schematic diagram of direction A in the middle;

[0038] Figure 7 This is a schematic diagram of the automatic ratchet rotary lock device of the present invention in use;

[0039] Figure 8 This is a schematic diagram of the connection of the rotary locking mechanism in the automatic ratchet rotary locking device of the present invention;

[0040] Figure 9 This is a schematic diagram of the connection between the existing lifting equipment and the super-highway frame. (a) shows the unconnected state, and (b) shows the connected state. Detailed Implementation

[0041] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] Combination Figures 1 to 2 , Figure 7 As shown, the automatic pawl rotary lock device provided by the present invention includes a housing 1, a rack 2, a gear shaft 3, a pawl mechanism 4, and an incomplete gear mechanism 5.

[0043] The rack 2 is located inside the housing 1. The upper and lower ends of the rack 2 pass through the top and bottom of the housing 1, respectively. The upper end of the rack 2 is connected to the connecting rod 101 on the super-high frame 100.

[0044] The gear shaft 3 is located inside the housing 1 and meshes with the rack 2.

[0045] The ratchet mechanism 4 is located inside the housing 1 and is mounted on the gear shaft 3 via the bearing 45, meshing with the incomplete gear mechanism 5.

[0046] The incomplete gear mechanism 5 is equipped with an output shaft 6, which is connected to the rotary lock mechanism 200.

[0047] Combination Figure 8 As shown, a crank 8 is mounted on the output shaft 6 of the automatic ratchet rotary locking device 400 of the present invention, and a synchronizing rod 9 and an output drive rod 10 are connected to the crank 8.

[0048] Synchronizing rod 9 is connected to the opposite synchronizing rod via a long connecting rod (there are a total of 4 pivot pins on the super-high frame 100, and one set of automatic ratchet rotary locking mechanism 400 controls two pivot pins) to synchronize the rotary locking mechanisms of the two sets of automatic ratchet rotary locking mechanisms 400, so as to avoid the asynchronous situation of one side unlocking and the other side locking.

[0049] The output drive rod 10 is connected to the connecting rod 11 in the rotary lock mechanism 200. Every 180° rotation of the crank 8 drives the rotary lock mechanism 200 to rotate 90° through the output drive rod 10.

[0050] Combination Figures 2 to 3 As shown, the ratchet mechanism 4 includes an inner ratchet 41, the inner hole of which is fitted onto the gear shaft 3. The inner hole of the inner ratchet 41 is provided with a ratchet 42 and a ratchet 43, which mesh with each other. The outer circle of the inner ratchet 41 is set as an incomplete gear (incomplete involute gear).

[0051] Combination Figure 2 and Figure 4 As shown, the incomplete gear mechanism 5 includes a driven wheel 51, the outer circle of which is configured as an incomplete gear.

[0052] The output drive rod 6 is connected to the inner hole of the driven wheel 51.

[0053] The inner pawl 41 has a locking arc 44 on its outer circumference, and the driven wheel 51 has a locking concave arc 52 on its outer circumference. The locking arc 44 and the locking concave arc 52 mesh with each other.

[0054] Combination Figure 2 , Figure 5 and Figure 6 As shown, it also includes a positioning mechanism 7, which includes a sleeve 71, an adjusting bolt 72, a spring 73, and a steel ball 74.

[0055] Sleeve 71 is located on housing 1, spring 73 is located inside sleeve 71, adjusting bolt 72 is located at the top of sleeve and contacts the upper end of spring 73, and steel ball 74 is located at the bottom of sleeve 71 and contacts the lower end of spring 73.

[0056] Steel ball 74 also contacts the outer circular surface of inner pawl 41.

[0057] The outer circle of the inner pawl 41 is provided with a plurality of equidistant spherical grooves 46, and the arc surface of the spherical grooves 46 is adapted to the arc surface of the steel ball 74.

[0058] See again Figure 2 As shown, the working principle of the automatic ratchet rotary locking device of the present invention is as follows:

[0059] When rack 2 moves downwards by 220mm under the weight of the overhead frame 100, the meshing gear shaft 3 rotates one revolution, causing pawl 42 to drive inner pawl 41 to rotate one revolution as well. (Since the inner pawl 41 has no circumferential freedom, a positioning mechanism 7 is added to apply a force to the inner pawl 41, requiring a certain amount of force to rotate.) With each revolution of the inner pawl 41, the meshing driven wheel 51 rotates 180°, and then the output drive rod 6 also rotates 180°. (Each time the incomplete gear mechanism 5 completes 180°, it will be in the position of the two arc surfaces, providing a reverse self-locking function for the output drive rod 6.) When rack 2 moves upwards by 220mm, the meshing gear shaft 3 rotates one revolution in the opposite direction, causing pawl 42 to also rotate one revolution in the opposite direction inside inner pawl 41, returning to its original position for the next operation. Because of the ratchet mechanism 4, the inner pawl 41 does not move, that is, the incomplete gear mechanism 5 also does not rotate, and the output drive rod 6 also remains stationary. The above working process is one working cycle of this structure.

[0060] Based on the above actions, rack 2 moves downward 220mm, and output drive rod 6 rotates 180°; rack 2 moves upward, and output drive rod 6 remains stationary. Rack 2 then moves downward 220mm again, and output drive rod 6 rotates 180°; rack 2 then moves upward again, and output drive rod 6 remains stationary, and so on, repeating the cycle.

[0061] See again Figure 3As shown, integrating the pawl 42 into the inner pawl 41 effectively saves space, simplifies the structure, and reduces the overall size of the pawl mechanism 4. The inner pawl 41 is made with a single tooth. When the pawl 42 rotates counterclockwise, it pushes the inner ratchet 41 to rotate one full turn counterclockwise. When the pawl 42 rotates clockwise, it rotates one full turn clockwise and returns to its original position, while the inner ratchet 41 remains stationary. The single tooth prevents the pawl 42 from rotating in the opposite direction midway through one full turn of the inner pawl 41, thus preventing the inner pawl 41 from being mispositioned and ensuring that the ratchet mechanism 4 remains in a constant position during movement.

[0062] See again Figure 4 As shown, to meet the requirement that the driven wheel 51 rotates 180° for every revolution of the inner pawl 41, the incomplete gear mechanism 5 has two locking concave arcs 52 symmetrically distributed at 180° on the driven wheel 51. This ensures that the output drive rod 6 moves 180° with each movement. The outer circle of the inner pawl 41 is provided with a locking arc 44 to prevent errors caused by the rotation of the driven wheel 51. When both the locking arc 44 and the locking concave arc 52 are engaged, the driven wheel 51 can be in a self-locking state.

[0063] See again Figure 5 and Figure 6 As shown, since the inner pawl 41 is unconstrained in the circumferential direction when the incomplete gear mechanism 5 is in the arc surface state, a positioning mechanism 7 is needed to apply a certain constraint force to it in the circumferential direction. The constraint force can be adjusted by adjusting bolt 72. Multiple spherical arc grooves 46 on the outer circle of the inner pawl 41 can prevent the positioning mechanism 7 from working normally when the ratchet mechanism 4 produces errors.

[0064] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. An automatic pawl rotary lock device, characterized in that: It includes a housing, rack and pinion, pawl mechanism, and incomplete gear mechanism; The rack is located inside the housing, with its upper and lower ends passing through the top and bottom of the housing, respectively. The upper end of the rack is connected to a connecting rod on the super-high frame. The gear shaft is located inside the housing and meshes with the rack; The ratchet mechanism is located inside the housing and is mounted on the gear shaft, meshing with the incomplete gear mechanism; The incomplete gear mechanism is equipped with an output shaft, which is connected to a rotary lock mechanism. The pawl mechanism includes an inner pawl; The inner hole of the inner pawl is fitted onto the gear shaft, and the inner hole is provided with a pawl and a ratchet tooth. The outer circle of the inner pawl is set as an incomplete gear. The incomplete gear mechanism includes a driven gear; The outer circle of the driven wheel is configured as an incomplete gear; The output shaft is connected to the inner hole of the driven wheel. The automatic ratchet rotary lock device also includes a positioning mechanism; The positioning mechanism includes a sleeve, an adjusting bolt, a spring, and a steel ball; The sleeve is provided on the box body; The spring is disposed inside the sleeve; The adjusting bolt is located at the top of the sleeve and contacts the upper end of the spring; The steel ball is located at the bottom of the sleeve and contacts the lower end of the spring; The steel ball also contacts the outer circular surface of the inner pawl. The outer circumference of the inner pawl is provided with multiple equidistant spherical grooves; The spherical groove is adapted to the steel ball.

2. The automatic ratchet rotary lock device according to claim 1, characterized in that: The outer circle of the inner pawl is provided with a locking arc, and the outer circle of the driven wheel is provided with a locking concave arc; The locking arc and the locking concave arc are engaged.

3. The automatic ratchet rotary lock device according to claim 2, characterized in that: The locking concave arc has two lines, which are symmetrically arranged at 180° on the outer circle of the driven wheel.

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