Bridge deck crane and walking mechanism and reversing assembly thereof

Abstract

The utility model relates to a deck crane and a walking mechanism and a reversing assembly thereof. The reversing assembly comprises a sliding support, a reversing ratchet block, a first plug pin, a second plug pin and a reversing driving unit. When the first bolt is arranged on one side of the reversing ratchet block in a penetrating manner, the reversing ratchet block can rotate towards the direction of the second bolt, and at the moment, the walking walking mechanism is in a track walking mode; when the second plug pin is arranged on the other side of the reversing ratchet block in a penetrating mode, the reversing ratchet block can rotate in the direction of the first plug pin, and at the moment, the walking walking mechanism is in a crane body walking mode. The reversing driving unit can drive the first plug pin to penetrate through one side of the reversing ratchet block and the second plug pin to penetrate through the other side of the reversing ratchet block alternately, automatic alternate switching of the reversing assembly between the crane body walking mode and the rail walking mode is achieved, the switching process is simple, manual participation is not needed, and the safety in the walking process is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of bridge construction, in particular to a deck crane and its walking mechanism and reversing assembly for walking on foot. Background Art

[0002] In the field of bridge construction, as a key construction equipment, the design of the walking mechanism of the deck crane directly affects the construction efficiency and safety. At present, the walking mechanisms of deck cranes at home and abroad generally adopt a walking-on-foot type that combines a track and an oil cylinder walking mechanism. The oil cylinder walking mechanism mainly consists of a reversing assembly and a driving oil cylinder. During the walking process, it is necessary to switch the state of the reversing assembly to achieve the walking of the crane body or the walking of the track. The specific operations include: switching to the walking state of the crane body or the walking state of the track, and then using the driving oil cylinder to drive the reversing assembly to expand and contract to complete the walking action.

[0003] However, during the process of switching the state of the reversing assembly, the method of manually inserting and removing the stop pin is often used to limit the rotation direction of the reversing ratchet block of the reversing assembly. This manual operation is not only inefficient, but also the operator needs to get under the crane body, which undoubtedly increases the complexity and safety risks of the operation. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a deck crane and its walking mechanism and reversing assembly for walking on foot that can improve the switching efficiency and reduce the safety risks in view of the above problems.

[0005] A reversing assembly of a walking mechanism for walking on foot, characterized in that the reversing assembly includes a sliding bracket, a reversing ratchet block, a first pin, a second pin and a reversing driving unit. The sliding bracket is used for rotatably connecting a walking driving component; the reversing ratchet block is rotatably arranged on the sliding bracket, and the reversing ratchet block can be inserted into a slot of the track; the first pin can be movably inserted through one side of the reversing ratchet block to limit the rotation of the reversing ratchet block in the direction of the first pin; the second pin can be movably inserted through the other side of the reversing ratchet block to limit the rotation of the reversing ratchet block in the direction of the second pin; the reversing driving unit is arranged on the sliding bracket, and both the first pin and the second pin are connected to the reversing driving unit. The reversing driving unit is used for driving the first pin to be inserted through one side of the reversing ratchet block and the second pin to be inserted through the other side of the reversing ratchet block alternately.

[0006] In one embodiment, a first jack and a second jack spaced from the first jack are formed on the sliding bracket. The first pin is aligned with the first jack, and the second pin is aligned with the second jack. The commutation drive unit includes a commutation power source and a linkage member. Both the first pin and the second pin are connected to the linkage member. The commutation power source is configured to drive the linkage member to reciprocate, so as to drive the first pin to be inserted into the first jack and the second pin to be inserted into the second jack alternately.

[0007] In one embodiment, the linkage member includes a movable cam and a linkage body. The first pin and the second pin are respectively connected to the linkage body. An activity cavity is formed in the linkage body. The movable cam is disposed in the activity cavity. The commutation power source is configured to drive the movable cam to rotate in the activity cavity, so as to push the linkage body to slide on the sliding bracket along the axial directions of the first pin and the second pin.

[0008] In one embodiment, both the commutation power source and the linkage member are located above the first pin and the second pin. One end of the first pin facing away from the second pin and one end of the second pin facing away from the first pin are both connected to the linkage member.

[0009] In one embodiment, the linkage member further includes two connecting portions. One end of the first pin facing away from the second pin and one end of the second pin facing away from the first pin are respectively connected to opposite ends of the linkage body through the two connecting portions.

[0010] In one embodiment, a sliding groove is formed on the sliding bracket. The linkage body is disposed in the sliding groove and can move in the sliding groove along the axial directions of the first pin and the second pin.

[0011] In one embodiment, the sliding bracket includes a sliding portion, a mounting portion, and a limiting portion. The limiting portion and the sliding portion are respectively disposed on opposite sides of the mounting portion. A through hole is formed on the sliding portion. The commutation ratchet is rotatably disposed on the mounting portion and can pass through the through hole. The sliding groove is formed on the limiting portion.

[0012] A walking mechanism of a bridge crane, the walking mechanism includes the commutation assembly and the walking drive assembly as described above. One end of the walking drive assembly is rotatably disposed on the sliding bracket, and the other end is configured to be rotatably disposed on the crane body. The walking drive assembly is configured to drive the commutation assembly to telescopically move.

[0013] A bridge deck crane, the bridge deck crane includes a crane body, a track, the walking mechanism as described above, and a walking control device. The track is arranged below the crane body. Along the length direction of the track, a plurality of spaced card slots are formed on the track. The walking driving assembly is rotatably connected to the crane body. The reversing assembly is slidably arranged on the track, and the reversing ratchet block can be inserted into the card slot. The reversing driving unit is electrically connected to the walking control device, and the walking control device is used to control the operation of the reversing driving unit.

[0014] In one embodiment, the bridge deck crane further includes a sliding mechanism. The walking driving assembly is rotatably connected to the sliding mechanism, and the sliding mechanism is slidably connected to the track.

[0015] For the above-mentioned bridge deck crane, its walking mechanism, and reversing assembly, when the first pin is inserted on one side of the reversing ratchet block, the reversing ratchet block can rotate towards the direction of the second pin. At this time, the walking mechanism is in the track walking mode. When the second pin is inserted on the other side of the reversing ratchet block, the reversing ratchet block can rotate towards the direction of the first pin. At this time, the walking mechanism is in the crane body walking mode. The reversing driving unit can drive the first pin to be inserted on one side of the reversing ratchet block and the second pin to be inserted on the other side of the reversing ratchet block alternately, realizing the automatic alternate switching of the reversing assembly between the crane body walking mode and the track walking mode. The switching process is simple and does not require manual participation, ensuring the safety during the walking process. During the walking process, by rotating the reversing ratchet block to insert into or rotate out of the card slot of the track, the walking movement of the crane body or the track is realized. Brief Description of the Drawings

[0016] The drawings constituting a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] In addition, the drawings are not drawn to a scale of 1:1, and the relative sizes of each component are only drawn exemplarily in the drawings and not necessarily drawn according to the actual scale.

[0019] Figure 1 It is a side view of the bridge deck crane in one embodiment.

[0020] Figure 2 is Figure 1 a partial side view of the walking mechanism and the track in

[0021] Figure 3 is Figure 2 a partial top view of the track in

[0022] Figure 4 is Figure 2 a side view of the walking mechanism in with the walking driving component omitted.

[0023] Figure 5 is Figure 4 the front view of the walking mechanism shown in

[0024] Figure 6 is Figure 4 a top view of the linkage, the first pin and the second pin in the state of being inserted into the first jack in

[0025] Figure 7 is Figure 4 a top view of the linkage, the first pin and the second pin in the state of being inserted into the second jack in

[0026] Figure 8 is Figure 4 the top view of the walking mechanism shown in

[0027] Description of reference numerals:

[0028] Bridge crane 1; Crane body 10; Track 20; Card slot 210; Walking mechanism 30; Walking driving component 301; Reversing component 302; Reversing ratchet 310; Sliding bracket 320; First jack 321; Second jack 322; Sliding groove 323; Sliding part 324; Mounting part 325; Limiting part 326; Reversing drive unit 330; Reversing power source 333; Linkage 334; Movable cam 3341; Linkage body 3342; Movable cavity 3343; Connecting part 3344; First pin 340; Second pin 350; Sliding mechanism 50; Rear anchoring mechanism 60. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0030] Refer to Figure 1 and Figure 2, the bridge crane 1 in an embodiment of the present application can at least improve the reliability and safety of the bridge crane 1 during the walking process. Specifically, the bridge crane 1 includes a crane body 10, a track 20, a walking mechanism 30, and a walking control device. The track 20 is arranged below the crane body 10. One end of the walking mechanism 30 is slidably arranged on the track 20 respectively, and the other end is rotatably connected to the crane body 10. The walking mechanism 30 is used to drive the relative movement between the track 20 and the crane body 10. The walking mechanism 30 is electrically connected to the walking control device, and the walking control device is used to control the operation of the walking mechanism 30.

[0031] In one embodiment, the walking mechanism 30 includes a walking driving component 301 and a reversing component 302. One end of the walking driving component 301 is rotatably connected to the reversing component 302, and the other end is rotatably connected to the crane body 10. The walking driving component 301 is used to drive the reversing component 302 to move telescopically. The reversing component 302 is slidably arranged on the track 20; the reversing component 302 can switch between a track walking mode and a crane body walking mode. Specifically, the bridge crane 1 further includes a sliding mechanism 50. The sliding mechanism 50 is used to be rotatably arranged at the bottom of the crane body 10. The sliding mechanism 50 is slidably connected to the track 20. The other end of the walking driving component 301 is rotatably connected to the front sliding mechanism 50.

[0032] The crane body 10 is slidably connected to the track 20 through the sliding mechanism 50. Control the reversing component 302 to switch to the track walking mode, and drive the track 20 to move along the forward direction through the walking driving component 301 until the track 20 moves into place. Then control the reversing component 302 to switch to the crane body walking mode, and the walking driving component 301 drives the crane body 10 to move on the track 20 to ensure that the crane body 10 can effectively move along the forward direction until the crane body 10 moves into place.

[0033] Refer to together Figure 3 , in one embodiment, along the length direction of the track 20, a plurality of spaced card slots 210 are formed on the track 20. Specifically, along the length direction of the track 20, the plurality of card slots 210 on the track 20 are arranged at equal intervals.

[0034] Refer to Figure 1 、 Figure 4 and Figure 5, in one embodiment, the commutation assembly 302 includes a commutation ratchet 310, a sliding bracket 320, and a commutation drive unit 330. One end of the walking drive assembly 301 is rotatably connected to the sliding bracket 320. The commutation ratchet 310 is rotatably arranged on the sliding bracket 320, and the commutation ratchet 310 can be inserted into the card slot 210. The commutation drive unit 330 is arranged on the sliding bracket 320 and is used to control the commutation ratchet 310 to switch between forward rotation and reverse rotation, so as to realize the switching of the walking mechanism 30 between the track walking mode and the crane body walking mode.

[0035] Specifically, the commutation assembly 302 further includes a first pin 340 and a second pin 350. The first pin 340 can movably penetrate one side of the commutation ratchet 310 to limit the commutation ratchet 310 from rotating in the direction of the first pin 340. The second pin 350 can movably penetrate the other side of the commutation ratchet 310 to limit the commutation ratchet 310 from rotating in the direction of the second pin 350. Both the first pin 340 and the second pin 350 are connected to the commutation drive unit 330, and the commutation drive unit 330 is used to drive the first pin 340 to penetrate one side of the commutation ratchet 310 and the second pin 350 to penetrate the other side of the commutation ratchet 310 alternately.

[0036] As Figure 4 shown, when the first pin 340 penetrates one side of the commutation ratchet 310, the commutation ratchet 310 can rotate in the direction of the second pin 350. At this time, the walking mechanism 30 of the crane is in the track walking mode; when the second pin 350 penetrates the other side of the commutation ratchet 310, the commutation ratchet 310 can rotate in the direction of the first pin 340. At this time, the walking mechanism 30 of the crane is in the crane body walking mode. The commutation drive unit 330 can drive the first pin 340 to penetrate one side of the commutation ratchet 310 and the second pin 350 to penetrate the other side of the commutation ratchet 310 alternately, realizing the automatic alternate switching of the commutation assembly 302 between the crane body walking mode and the track walking mode. The switching process is simple and does not require manual participation, ensuring the safety during the walking process. During the walking process, by rotating the commutation ratchet 310 to insert into or out of the card slot of the track, the walking movement of the crane body or the track is realized.

[0037] Refer to Figures 5 to 8, in this embodiment, a first jack 321 and a second jack 322 spaced from the first jack 321 are formed on the sliding bracket 320. When the reversing ratchet 310 is inserted into the card slot 210, the reversing ratchet 310 is located between the first jack 321 and the second jack 322. Specifically, the first pin 340 is aligned with the first jack 321 and can be inserted into the first jack 321, and the second pin 350 is aligned with the second jack 322 and can be inserted into the second jack 322. When the first pin 340 is inserted into the first jack 321, it can limit the rotation of the reversing ratchet 310 in the direction of the first pin 340, and when the second pin 350 is inserted into the second jack 322, it can limit the rotation of the reversing ratchet 310 in the direction of the second pin 350.

[0038] Specifically, the reversing drive unit 330 includes a reversing power source 333 and a linkage member 334. Both the first pin 340 and the second pin 350 are connected to the linkage member 334. The reversing power source 333 is used to drive the linkage member 334 to reciprocate, so as to drive the first pin 340 to be inserted into the first jack 321 and the second pin 350 to be inserted into the second jack 322 alternately. Through the reversing power source 333 and the linkage member 334, the synchronous movement of the first pin 340 and the second pin 350 can be realized, and then the first pin 340 is inserted into the first jack 321 and the second pin 350 is inserted into the second jack 322 alternately at the same time. As Figure 4 shown, when the first pin 340 is inserted into the first jack 321, it restricts the reversing ratchet 310 from rotating only counterclockwise. At this time, the walking mechanism 30 is in the track walking mode; when the second pin 350 is inserted into the second jack 322, it restricts the reversing ratchet 310 from rotating only clockwise. At this time, the walking mechanism 30 is in the crane body walking mode. Through the cooperation of the reversing power source 333 and the linkage member 334, the automatic switching of the walking mode is realized, avoiding manual operation for switching.

[0039] As Figure 6 and Figure 7As shown in the figure, further, one end of the first bolt 340 facing away from the second bolt 350 and one end of the second bolt 350 facing away from the first bolt 340 are both connected to the linkage member 334. Among them, the reversing power source 333 and the linkage member 334 are both located above the first bolt 340 and the second bolt 350. Since it is necessary to control the insertion of the first bolt 340 into the first jack 321 or the second bolt 350 into the second jack 322 at different times, the sliding bracket 320 needs to be slidably arranged on the track 20. Furthermore, the space of the sliding bracket 320 in the horizontal direction is limited. If the size of the sliding bracket 320 is increased in the horizontal direction, it may cause the sliding bracket 320 to be unbalanced in force on the track 20, affecting the sliding stability. Therefore, setting the reversing power source 333 and the linkage member 334 above the first bolt 340 and the second bolt 350 can avoid increasing the lateral size of the sliding bracket 320, making the structure of the reversing assembly 302302 more compact.

[0040] In one embodiment, the linkage member 334 includes a movable cam 3341 and a linkage body 3342. The first bolt 340 and the second bolt 350 are respectively connected to the linkage body 3342. An activity cavity 3343 is formed in the linkage body 3342. The movable cam 3341 is arranged in the activity cavity 3343. The reversing power source 333 is used to drive the movable cam 3341 to rotate in the activity cavity 3343 to push the linkage body 3342 to slide on the sliding bracket 320 along the axial directions of the first bolt 340 and the second bolt 350. When the movable cam 3341 is driven to rotate by the reversing power source 333, the rotation of the linkage body 3342 is restricted by the sliding bracket 320, so that the linkage body 3342 can only slide along the axial directions of the first bolt 340 and the second bolt 350 under the action of the movable cam 3341, so as to achieve the purpose of inserting the first bolt 340 into the first jack 321 or the second bolt 350 into the second jack 322. By arranging the movable cam 3341 and the linkage body 3342, only by driving the movable cam 3341 to rotate in one direction, the insertion of the first bolt 340 into the first jack 321 or the insertion of the second bolt 350 into the second jack 322 can be switched alternately, and the driving process is convenient and reliable.

[0041] Specifically, the linkage member 334 further includes two connecting portions 3344. The first bolt 340 and the second bolt 350 are both located below the linkage body 3342. One end of the first bolt 340 facing away from the second bolt 350 and one end of the second bolt 350 facing away from the first bolt 340 are respectively connected to the opposite ends of the linkage body 3342 through the two connecting portions 3344. The connection of the first bolt 340 and the second bolt 350 to the linkage body 3342 is facilitated through the connecting portions 3344. At the same time, it is convenient to arrange the first bolt 340 and the second bolt 350 below the linkage body 3342, improving the compactness of the structure and avoiding affecting the walking stability.

[0042] Refer to Figure 4 、 Figure 5 and Figure 8 In one embodiment, a sliding groove 323 is formed on the sliding bracket 320, and the linkage body 3342 is disposed in the sliding groove 323 and can move along the axial directions of the first pin 340 and the second pin 350 in the sliding groove 323. By providing the sliding groove 323, the moving direction of the linkage body 3342 can be more stably restricted, ensuring that the first pin 340 can be more stably inserted into the first jack 321 or the second pin 350 can be more stably inserted into the second jack 322.

[0043] Refer to Figure 4 and Figure 5 In this embodiment, the sliding bracket 320 includes a sliding portion 324, a mounting portion 325 and a limiting portion 326. The limiting portion 326 and the sliding portion 324 are respectively disposed on two opposite sides of the mounting portion 325. A through hole is formed on the sliding portion 324. The reversing ratchet block 310 is rotatably disposed on the mounting portion 325 and can pass through the through hole. A sliding groove 323 is formed on the limiting portion 326. By providing the sliding portion 324, the sliding connection between the sliding bracket 320 and the track 20 can be conveniently realized, facilitating the sliding of the reversing assembly 302 on the track 20. By providing the mounting portion 325, the installation of each component can be conveniently realized, and by providing the limiting portion 326, the sliding groove 323 can be conveniently formed, thereby facilitating the stable movement of the linkage body 3342.

[0044] Refer to Figure 1 In one embodiment, the number of the tracks 20 is at least two, and the tracks 20 are arranged in parallel and spaced apart below the crane body 10; the number of the walking mechanisms 30 is two, and the two walking mechanisms 30 are respectively movably disposed on the two tracks 20. In this embodiment, the number of the tracks 20 is two. In other embodiments, the number of the tracks 20 can be three, four or other numbers, and the two image acquisition devices 70 can only acquire the images of two of the tracks 20.

[0045] In one embodiment, the bridge crane 1 further includes a leg mechanism, and the leg mechanism is telescopically disposed at the bottom of the crane body 10. When the track 20 needs to be moved, the leg mechanism can be driven to lift the crane body 10, preventing the gravity of the crane body 10 from being applied to the track 20 through the sliding mechanism 50 and affecting the movement of the track 20. Specifically, the number of the leg mechanisms is at least two, and two of the leg mechanisms are respectively located outside the two tracks 20. By at least two leg mechanisms, the reliability of supporting the crane body 10 can be improved.

[0046] In one embodiment, the bridge deck crane 1 further includes a rear anchoring mechanism 60. The rear anchoring mechanism 60 is disposed at the bottom of the crane body 10 and behind the sliding mechanism 50, and is used for anchoring on the bridge deck. By providing the rear anchoring mechanism 60, the reliability of the crane body 10 installed on the bridge deck can be improved.

[0047] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0048] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0049] In the present application, unless otherwise clearly defined and limited, if terms such as "install", "connect", "join", "fix" appear, these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0050] In this application, unless otherwise clearly defined and limited, when a first feature is described as being "on" or "under" a second feature or similar descriptions, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0051] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0052] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0053] The above-described embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the protection scope of this patent application shall be subject to the appended claims.

Claims

1. A reversing component of a walking mechanism of a step, characterized in that, The commutation assembly includes: A sliding bracket, which is used to rotatably connect to the walking drive assembly; A commutation ratchet block, which is rotatably arranged on the sliding bracket and can be inserted into the card slot of the track; A first pin, which can movably penetrate through one side of the commutation ratchet block to limit the commutation ratchet block from rotating towards the first pin; A second pin, which can movably penetrate through the other side of the commutation ratchet block to limit the commutation ratchet block from rotating towards the second pin; and A commutation drive unit, which is arranged on the sliding bracket. Both the first pin and the second pin are connected to the commutation drive unit. The commutation drive unit is used to drive the first pin to penetrate through one side of the commutation ratchet block and the second pin to penetrate through the other side of the commutation ratchet block alternately.

2. The commutation assembly of the step walking mechanism according to claim 1, characterized in that, A first jack and a second jack spaced from the first jack are formed on the sliding bracket. The first pin is aligned with the first jack, and the second pin is aligned with the second jack. The commutation drive unit includes a commutation power source and a linkage. Both the first pin and the second pin are connected to the linkage. The commutation power source is used to drive the linkage to reciprocate, so as to drive the first pin to be inserted into the first jack and the second pin to be inserted into the second jack alternately.

3. The commutation assembly of the step walking mechanism according to claim 2, characterized in that, The linkage includes a movable cam and a linkage body. The first pin and the second pin are respectively connected to the linkage body. An activity cavity is formed in the linkage body. The movable cam is arranged in the activity cavity. The commutation power source is used to drive the movable cam to rotate in the activity cavity, so as to push the linkage body to slide on the sliding bracket along the axial directions of the first pin and the second pin.

4. The commutation component of the step walking mechanism according to claim 3, characterized in that, Both the commutation power source and the linkage are located above the first pin and the second pin. One end of the first pin facing away from the second pin and one end of the second pin facing away from the first pin are both connected to the linkage.

5. The commutation assembly of the step walking mechanism according to claim 4, characterized in that, The linkage further includes two connecting parts. One end of the first pin facing away from the second pin and one end of the second pin facing away from the first pin are respectively connected to opposite ends of the linkage body through the two connecting parts.

6. The commutation assembly of the step walking mechanism according to any one of claims 3-5, characterized in that, A sliding groove is formed on the sliding bracket. The linkage body is arranged in the sliding groove and can move in the sliding groove along the axial directions of the first pin and the second pin.

7. The commutation assembly of the step walking mechanism according to claim 6, characterized in that, The sliding bracket includes a sliding part, a mounting part and a limiting part. The limiting part and the sliding part are respectively arranged on opposite sides of the mounting part. A through hole is formed on the sliding part. The commutation ratchet block is rotatably arranged on the mounting part and can penetrate through the through hole. The sliding groove is formed on the limiting part.

8. A walking mechanism of a bridge deck crane, characterized in that, The walking mechanism includes: The commutation assembly according to any one of claims 1-7; and The walking drive assembly, one end of the walking drive assembly is rotatably arranged on the sliding bracket, and the other end is used to be rotatably arranged on the crane body, and the walking drive assembly is used to drive the reversing assembly to move telescopically.

9. A bridge deck crane, characterized in that, The bridge crane includes: The crane body; The track, the track is arranged below the crane body, along the length direction of the track, a plurality of spaced card slots are opened on the track; The walking mechanism according to claim 8, the walking drive assembly is rotatably connected to the crane body, the reversing assembly is slidably arranged on the track, and the reversing ratchet block can be inserted into the card slot; and The walking control device, the reversing drive unit is electrically connected to the walking control device, and the walking control device is used to control the operation of the reversing drive unit.

10. The bridge crane according to claim 9, characterized in that, The bridge crane further includes a sliding mechanism, the walking drive assembly is rotatably connected to the sliding mechanism, and the sliding mechanism is slidably connected to the track.

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