A detection device and a crane

Abstract

The utility model relates to engineering machinery technical field discloses a detection device and crane, detection device includes interval arrangement's first track and second track, is equipped with first connecting plate on the first track, is equipped with second connecting plate on the second track, and the first track and second track can be close to each other or away from each other to realize the switching between wide rail working condition and narrow rail working condition. The first proximity switch and the second proximity switch are equipped on the frame, the first proximity switch can detect the position of the first detection block on the first connecting plate, the second proximity switch can detect the position of the second detection block on the second connecting plate, and along the first direction, the projection of the second detection block and the first connecting plate does not overlap, and the projection of the first detection block and the second connecting plate does not overlap. The utility model can solve the problem that the track telescopic detection structure of stroke switch is easily damaged by collision in the track telescopic process in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to a testing device and a crane. Background Technology

[0002] In existing technologies, telescopic boom crawler cranes are typically equipped with both wide-gauge and narrow-gauge load gauges to adapt to the load-bearing requirements of different operating scenarios. Currently, a common approach is to use limit switches in conjunction with a detection structure. When the track extends to a preset position, the detection block triggers the limit switch to generate a signal, thereby switching the operating conditions of the telescopic boom crane.

[0003] Because the space in the crane track installation area is relatively small, during the track extension and retraction process, the detection block on the other side of the extension plate is prone to collision with the limit switch on this side, which can easily damage the limit switch. This not only affects the maintenance cost and downtime of the equipment, but also seriously restricts the operational reliability of the telescopic boom crawler crane. Utility Model Content

[0004] This invention provides a detection device and a crane to solve the problem that existing track telescopic detection structures using limit switches are easily damaged by collisions during track telescopic processes.

[0005] In a first aspect, this utility model provides a detection device installed on a crane, the crane including a frame, a first track and a second track; the first track and the second track are spaced apart on both sides of the frame along a first direction; the first track and the second track are adapted to be far apart or close together to enable the crane to switch between wide-gauge and narrow-gauge working conditions; the crane also includes a first connecting plate; one end of the first connecting plate is disposed on the first track, and the other end extends toward the side close to the second track; a second connecting plate is disposed on the second track, and the other end extends toward the side close to the first track; The detection device includes: The first proximity switch is mounted on the frame. The second proximity switch is mounted on the frame. A first detection block is disposed on a first connecting plate. The first detection block is adapted to move with the first connecting plate and has a first detection state corresponding to the detection end of the first proximity switch. The second detection block is disposed on the second connecting plate. The second detection block is adapted to move with the second connecting plate and has a second detection state corresponding to the detection end of the second proximity switch. Along the first direction, the projection of the second detection block does not overlap with that of the first connecting plate, and / or the projection of the first detection block does not overlap with that of the second connecting plate.

[0006] Beneficial effects: Using a first proximity switch and a second proximity switch instead of a limit switch can prevent the first and second detection blocks from colliding with the limit switches when the first and second tracks move in the first direction, thus avoiding damage to the limit switches, interruption of the detection signal, misjudgment of the working condition switching state, and potential safety hazards. At the same time, using the first proximity switch and the second proximity switch instead of the limit switch eliminates the need for direct contact between the first and second detection blocks during the detection process. This not only eliminates the risk of damage caused by collisions with the mechanical mechanism, but also ensures stable output of the detection signal, extends the service life of the detection device, and improves the overall operational stability of the equipment.

[0007] In one optional implementation, the first detection block includes a first wide rail detection block and a first narrow rail detection block. The first wide rail detection block is used to detect a preset position when the first track is in wide rail working condition, and the first narrow rail detection block is used to detect a preset position when the first track is in narrow rail working condition. The second detection block includes a second wide-gauge detection block and a second narrow-gauge detection block. The second wide-gauge detection block is used to detect the preset position of the second track when it is in wide-gauge working condition, and the second narrow-gauge detection block is used to detect the preset position of the second track when it is in narrow-gauge working condition.

[0008] Beneficial effects: The testing of the first and second tracks under wide-gauge and narrow-gauge conditions is completed through independent testing blocks, which do not interfere with each other, thus improving the accuracy of the test results and ensuring the operational stability of the crane under different working conditions.

[0009] In one optional embodiment, the frame is provided with a first mounting base and a second mounting base, and a first proximity switch and a second proximity switch are respectively disposed on the first mounting base and the second mounting base.

[0010] In one optional embodiment, the first mounting base includes two first mounting plates, which are spaced apart to form a first mounting space between them, and a first connecting plate passes through the first mounting space. The second mounting base includes two second mounting plates, which are spaced apart to form a second mounting space between them, and a second connecting plate passes through the second mounting space.

[0011] Beneficial effects: The first and second installation spaces can limit the movement of the first and second connecting plates, preventing them from swaying vertically in the first direction when switching operating conditions. This ensures that after the first and second connecting plates move, the first detection block and the first proximity switch, as well as the second detection block and the second proximity switch, can correspond to each other, thus improving the accuracy of detection.

[0012] In one alternative embodiment, the first mounting base and the second mounting base are spaced apart on the frame along a second direction so that the first connecting plate and the second connecting plate will not collide when switching between wide rail and narrow rail conditions.

[0013] Beneficial effects: By arranging the first mounting base and the second mounting base at intervals along the second direction on the frame, it is possible to avoid motion interference and collision between the first connecting plate and the second connecting plate during movement, avoid problems such as jamming or deformation between the first connecting plate and the second connecting plate or displacement of the first detection block and the second detection block caused by collision, reduce wear between the first connecting plate and the second connecting plate and related components, and reduce maintenance of components caused by collision.

[0014] In one optional embodiment, a guide structure is provided in the first installation space and the second installation space, and the guide structure and the first connecting plate or the second connecting plate form a sliding fit so that the first connecting plate and the second connecting plate can extend and retract in a first direction.

[0015] Beneficial effects: The guide structure allows the first and second connecting plates to slide along a preset trajectory within the first and second installation spaces, preventing the first and second connecting plates from shifting or twisting during movement. This also prevents incomplete switching of operating conditions due to obstructed movement of the first and second connecting plates, further ensuring the continuity of crane operation and making the crane switch more smoothly between wide-gauge and narrow-gauge tooling conditions.

[0016] In one optional embodiment, the first proximity switch and the second proximity switch are detachably disposed on the first mounting base and the second mounting base, and the first mounting base and the second mounting base are provided with a plurality of mounting positions for mounting the first proximity switch or the second proximity switch.

[0017] Beneficial effects: When a crane needs to adjust or replace a proximity switch of a different model, or when a proximity switch is damaged, there is no need to adjust the mounting base. Simply remove the mounting base and adjust it to a suitable mounting position to complete the adaptation. The setting of multiple mounting positions helps to calibrate the relative distance between the detection block and the detection end, avoids detection deviation caused by fixed installation position, and reduces the cost of equipment modification.

[0018] In one alternative implementation, the first detection block and the first connecting plate are detachably connected, and the second detection block and the second connecting plate are detachably connected to adjust the position of the first detection block and the second detection block on the first connecting plate or the second connecting plate.

[0019] Beneficial effects: During the equipment assembly stage, the fixed positions of the first and second detection blocks on the first and second connecting plates can be adjusted according to the installation positions of the first and second proximity switches and the preset position requirements for wide-gauge and narrow-gauge working conditions. This avoids detection deviations caused by assembly errors and improves the accuracy and reliability of working condition detection. At the same time, since the first and second detection blocks are detachably connected, when the first or second detection block is damaged due to long-term use, the damaged detection block can be removed separately without replacing the entire connecting plate, which can reduce downtime losses and maintenance costs.

[0020] Secondly, this utility model also provides a crane, including a frame, a first track and a second track; the first track and the second track are spaced apart on both sides of the frame along a first direction; the first track and the second track are adapted to be far apart or close together to enable the crane to switch between wide-gauge and narrow-gauge working conditions; the crane also includes a first connecting plate; one end of the first connecting plate is disposed on the first track, and the other end extends toward the side closer to the second track; a second connecting plate is disposed on the second track, and the other end extends toward the side closer to the first track; and it also includes the detection device as described above.

[0021] In one alternative embodiment, both the first proximity switch and the second proximity switch are electrically connected to the crane's control system, which controls the movement of the first connecting plate and the second connecting plate along a first direction.

[0022] Beneficial effects: The first proximity switch and the second proximity switch can collect the position signals of the first track and the second track in real time and transmit them to the control system. The control system determines whether the first track and the second track have reached the preset position based on the signals, and then automatically adjusts the extension and retraction movement of the first connecting plate and the second connecting plate. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a top view of a crane according to an embodiment of the present utility model; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 This is a front view of a crane according to an embodiment of the present utility model; Figure 4 for Figure 3 A magnified view of part B in the diagram; Figure 5 This is a perspective view of a crane according to an embodiment of the present utility model; Figure 6 for Figure 5 A magnified view of part C in the diagram.

[0025] Explanation of reference numerals in the attached figures: 1. Frame; 2. First track; 3. Second track; 4. First connecting plate; 41. First detection block; 411. First wide rail detection block; 412. First narrow rail detection block; 5. Second connecting plate; 51. Second detection block; 511. Second wide rail detection block; 512. Second narrow rail detection block; 6. First proximity switch; 7. Second proximity switch; 8. First mounting base; 81. First mounting plate; 9. Second mounting base; 91. Second mounting plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] In existing technologies, telescopic boom crawler cranes are typically equipped with both wide-gauge and narrow-gauge load gauges to adapt to the load-bearing requirements of different operating scenarios. Currently, a common approach is to use limit switches in conjunction with a detection structure. When the track extends to a preset position, the detection block triggers the limit switch to generate a signal, thereby switching the operating conditions of the telescopic boom crane.

[0028] Because the space in the crane track installation area is relatively small, during the track extension and retraction process, the detection block on the other side of the extension plate is prone to collision with the limit switch on this side, which can easily damage the limit switch. This not only affects the maintenance cost and downtime of the equipment, but also seriously restricts the operational reliability of the telescopic boom crawler crane.

[0029] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0030] According to an embodiment of the present invention, in one aspect, a detection device is provided, which is installed on a crane. The crane includes a frame 1, a first track 2, and a second track 3. The first track 2 and the second track 3 are spaced apart on both sides of the frame 1 along a first direction. The first track 2 and the second track 3 are adapted to be far apart or close to each other so that the crane can switch between wide-gauge and narrow-gauge working conditions. The crane also includes a first connecting plate 4. One end of the first connecting plate 4 is disposed on the first track 2, and the other end extends toward the side close to the second track 3. A second connecting plate 5 is disposed on the second track 3, and the other end extends toward the side close to the first track 2. The detection device includes: The first proximity switch 6 is mounted on the frame 1; The second proximity switch 7 is mounted on the frame 1; The first detection block 41 is disposed on the first connecting plate 4. The first detection block 41 is adapted to move with the first connecting plate 4 and has a first detection state corresponding to the detection end of the first proximity switch 6. The second detection block 51 is disposed on the second connecting plate 5. The second detection block 51 is adapted to move with the second connecting plate 5 and has a second detection state corresponding to the detection end of the second proximity switch 7. Along the first direction, the projection of the second detection block 51 does not overlap with that of the first connecting plate 4, and / or the projection of the first detection block 41 does not overlap with that of the second connecting plate 5.

[0031] Optionally, the first proximity switch 6 and the second proximity switch 7 can be inductive proximity switches, and the first detection block 41 and the second detection block 51 can be made of ferromagnetic metal; or the first proximity switch 6 and the second proximity switch 7 can be optical proximity switches, which trigger a signal when the detection block blocks the proximity switch. The first connecting plate 4 and the second connecting plate 5 can be made of high-strength alloy steel plates. It should be noted that the length of the first connecting plate 4 and the second connecting plate 5 needs to be less than the distance between the first track 2 and the second track 3 when the crane is in narrow-gauge operation.

[0032] Using the first proximity switch 6 and the second proximity switch 7 instead of the limit switch can prevent the first detection block 41 and the second detection block 51 from colliding with the limit switch when the first track 2 and the second track 3 move in the first direction, which would damage the limit switch, cause interruption of the detection signal, misjudgment of the working condition switching state, and thus pose a safety hazard. At the same time, using the first proximity switch 6 and the second proximity switch 7 instead of the limit switch eliminates the need for direct contact between the first detection block 41 and the second detection block 51 during the detection process. This not only eliminates the risk of damage caused by collisions with the mechanical mechanism, but also ensures stable output of the detection signal, extends the service life of the detection device, and improves the overall operational stability of the equipment.

[0033] In one embodiment, the first detection block 41 includes a first wide rail detection block 411 and a first narrow rail detection block 412. The first wide rail detection block 411 is used to detect a preset position when the first track 2 is in wide rail working condition, and the first narrow rail detection block 412 is used to detect a preset position when the first track 2 is in narrow rail working condition. The second detection block 51 includes a second wide rail detection block 511 and a second narrow rail detection block 512. The second wide rail detection block 511 is used to detect the second track 3 in a preset position when it is in wide rail condition, and the second narrow rail detection block 512 is used to detect the second track 3 in a preset position when it is in narrow rail condition.

[0034] It should be noted that, in addition to the first wide rail detection block 411 and the first narrow rail detection block 412, other detection blocks can be set on the first connecting plate 4. In addition to the second wide rail detection block 511 and the second narrow rail detection block 512, other detection blocks can also be set on the second connecting plate 5. For example, if the crane has a third working condition in addition to the wide rail working condition and the narrow rail working condition, additional detection blocks can be added to correspond to the third working condition.

[0035] The testing of the wide-gauge and narrow-gauge conditions of the first track 2 and the second track 3 is completed through independent testing blocks, which do not interfere with each other, thus improving the accuracy of the testing results and ensuring the operational stability of the crane under different working conditions.

[0036] In one embodiment, the frame 1 is provided with a first mounting base 8 and a second mounting base 9, and a first proximity switch 6 and a second proximity switch 7 are respectively disposed on the first mounting base 8 and the second mounting base 9.

[0037] In one embodiment, the first mounting base 8 includes two first mounting plates 81, which are spaced apart to form a first mounting space between the two first mounting plates 81, and the first connecting plate 4 passes through the first mounting space. The second mounting base 9 includes two second mounting plates 91, which are spaced apart to form a second mounting space between them, and the second connecting plate 5 passes through the second mounting space.

[0038] It should be noted that the two first mounting plates 81 are arranged in parallel, and the distance between the two first mounting plates 81 is greater than the thickness of the first connecting plate 4, so that the first connecting plate 4 can slide smoothly in the first mounting space; the two second mounting plates 91 are arranged in parallel, and the distance between the two second mounting plates 91 is greater than the thickness of the second connecting plate 5, so that the second connecting plate 5 can slide smoothly in the second mounting space.

[0039] The first and second installation spaces can limit the movement of the first connecting plate 4 and the second connecting plate 5, preventing them from shaking vertically in the first direction when switching operating conditions. This ensures that after the first connecting plate 4 and the second connecting plate 5 move, the first detection block 41 and the first proximity switch 6, the second detection block 51 and the second proximity switch 7 can correspond, thus improving the accuracy of detection.

[0040] In one embodiment, the first mounting base 8 and the second mounting base 9 are spaced apart on the frame 1 along a second direction so that the first connecting plate 4 and the second connecting plate 5 will not collide when switching between wide rail and narrow rail conditions.

[0041] In this embodiment, the second direction is the height direction of the crane, which means that the first mounting base 8 and the second mounting base 9 are at different heights on the crane.

[0042] By arranging the first mounting base 8 and the second mounting base 9 at intervals along the second direction on the frame 1, it is possible to avoid motion interference and collision between the first connecting plate 4 and the second connecting plate 5 during movement, avoid problems such as jamming or deformation between the first connecting plate 4 and the second connecting plate 5 or displacement of the first detection block 41 and the second detection block 51 caused by collision, reduce wear between the first connecting plate 4 and the second connecting plate 5 and related components, and reduce maintenance of components caused by collision.

[0043] In one embodiment, a guide structure is provided in the first installation space and the second installation space, and the guide structure and the first connecting plate 4 or the second connecting plate 5 form a sliding fit so that the first connecting plate 4 and the second connecting plate 5 can extend and retract in the first direction.

[0044] In this embodiment, the guide structure can be a guide groove and a boss structure. A guide groove is provided on the first mounting plate 81 located below the first mounting base 8, and a boss structure adapted to the guide groove is provided below the first connecting plate 4. Similarly, a guide groove is provided on the second mounting plate 91 located below the second mounting base 9, and a boss structure adapted to the guide groove is provided below the second connecting plate 5.

[0045] The guide structure allows the first connecting plate 4 and the second connecting plate 5 to slide along a preset trajectory in the first installation space and the second installation space, preventing the first connecting plate 4 and the second connecting plate 5 from shifting or twisting during movement, and preventing incomplete switching of working conditions due to obstructed movement of the first connecting plate 4 and the second connecting plate 5, further ensuring the continuity of crane operation, and making the crane switch more smoothly between wide rail working conditions and narrow rail tooling.

[0046] In one embodiment, the first proximity switch 6 and the second proximity switch 7 are detachably disposed on the first mounting base 8 and the second mounting base 9, and the first mounting base 8 and the second mounting base 9 are provided with a plurality of mounting positions for mounting the first proximity switch 6 or the second proximity switch 7.

[0047] When a crane needs to adjust or replace a proximity switch of a different model, or when a proximity switch is damaged, there is no need to adjust the mounting base. Simply remove the mounting base and adjust it to a suitable mounting position to complete the adaptation. The setting of multiple mounting positions helps to calibrate the relative distance between the detection block and the detection end, avoids detection deviation caused by fixed installation position, and reduces the cost of equipment modification.

[0048] In one embodiment, the first detection block 41 and the first connecting plate 4 are detachably connected, and the second detection block 51 and the second connecting plate 5 are detachably connected to adjust the position of the first detection block 41 and the second detection block 51 on the first connecting plate 4 or the second connecting plate 5.

[0049] The first detection block 41 and the first connecting plate 4, and the second detection block 51 and the second connecting plate 5 can be connected by bolts, snap-fit, or other means. A guide rail can be fixed on the first mounting plate 81 and the second mounting plate 91. Multiple positioning holes are provided on the guide rail. The first proximity switch 6 or the second proximity switch 7 is assembled on the mounting base that is compatible with the guide rail. The mounting base can slide along the guide rail and can be fixed at any mounting hole of the guide rail by positioning bolts.

[0050] During the equipment assembly stage, the fixed positions of the first detection block 41 and the second detection block 51 on the first connecting plate 4 and the second connecting plate 5 can be adjusted according to the installation positions of the first proximity switch 6 and the second proximity switch 7, as well as the preset position requirements for wide rail and narrow rail working conditions. This avoids detection deviations caused by assembly errors and improves the accuracy and reliability of working condition detection. At the same time, since the first detection block 41 and the second detection block 51 are detachably connected, when the first detection block 41 or the second detection block 51 is damaged due to long-term use, the damaged detection block can be removed separately without replacing the entire connecting plate, which can reduce downtime losses and maintenance costs.

[0051] According to an embodiment of the present invention, another aspect provides a crane, including a frame 1, a first track 2 and a second track 3; the first track 2 and the second track 3 are spaced apart on both sides of the frame 1 along a first direction; the first track 2 and the second track 3 are adapted to be far apart or close together to allow the crane to switch between wide-gauge and narrow-gauge working conditions; the crane also includes a first connecting plate 4; one end of the first connecting plate 4 is disposed on the first track 2, and the other end extends toward the side closer to the second track 3; a second connecting plate 5 is disposed on the second track 3, and the other end extends toward the side closer to the first track 2; and a detection device as described above is also provided.

[0052] In one embodiment, both the first proximity switch 6 and the second proximity switch 7 are electrically connected to the crane's control system, which controls the movement of the first connecting plate 4 and the second connecting plate 5 along a first direction.

[0053] The first proximity switch 6 and the second proximity switch 7 can collect the position signals of the first track 2 and the second track 3 in real time and transmit them to the control system. The control system determines whether the first track 2 and the second track 3 have reached the preset position based on the signals, and then automatically adjusts the extension and retraction movement of the first connecting plate 4 and the second connecting plate 5.

[0054] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A detection device, installed on a crane, characterized in that, The crane includes a frame (1), a first track (2) and a second track (3); the first track (2) and the second track (3) are spaced apart on both sides of the frame (1) along a first direction; the first track (2) and the second track (3) are adapted to move away from or close to each other so that the crane can switch between wide-gauge and narrow-gauge working conditions; the crane also includes a first connecting plate (4); one end of the first connecting plate (4) is disposed on the first track (2) and the other end extends toward the side close to the second track (3); a second connecting plate (5) is disposed on the second track (3) and the other end extends toward the side close to the first track (2); The detection device includes: A first proximity switch (6) is disposed on the frame (1); The second proximity switch (7) is disposed on the frame (1); The first detection block (41) is disposed on the first connecting plate (4). The first detection block (41) is adapted to move with the first connecting plate (4) and has a first detection state corresponding to the detection end of the first proximity switch (6). The second detection block (51) is disposed on the second connecting plate (5). The second detection block (51) is adapted to move with the second connecting plate (5) and has a second detection state corresponding to the detection end of the second proximity switch (7). Along the first direction, the projection of the second detection block (51) does not overlap with that of the first connecting plate (4), and / or the projection of the first detection block (41) does not overlap with that of the second connecting plate (5).

2. The detection device according to claim 1, characterized in that, The first detection block (41) includes a first wide rail detection block (411) and a first narrow rail detection block (412). The first wide rail detection block (411) is used to detect the first track (2) in a preset position when it is in the wide rail working condition. The first narrow rail detection block (412) is used to detect the first track (2) in a preset position when it is in the narrow rail working condition. The second detection block includes a second wide rail detection block (511) and a second narrow rail detection block (512). The second wide rail detection block (511) is used to detect the second track (3) in a preset position when it is in the wide rail condition, and the second narrow rail detection block (512) is used to detect the second track (3) in a preset position when it is in the narrow rail condition.

3. The detection device according to claim 1, characterized in that, The frame (1) is provided with a first mounting base (8) and a second mounting base (9), and the first proximity switch (6) and the second proximity switch (7) are respectively mounted on the first mounting base (8) and the second mounting base (9).

4. The detection device according to claim 3, characterized in that, The first mounting base (8) includes two first mounting plates (81), which are spaced apart to form a first mounting space between them, and the first connecting plate (4) passes through the first mounting space. The second mounting base (9) includes two second mounting plates (91), which are spaced apart to form a second mounting space between them, and the second connecting plate (5) passes through the second mounting space.

5. The detection device according to claim 3, characterized in that, The first mounting base (8) and the second mounting base (9) are spaced apart on the frame (1) along the second direction so that the first connecting plate (4) and the second connecting plate (5) will not collide when switching between the wide rail condition and the narrow rail condition.

6. The detection device according to claim 4, characterized in that, The first installation space and the second installation space are provided with guide structures, and the guide structures and the first connecting plate (4) or the second connecting plate (5) form a sliding fit so that the first connecting plate (4) and the second connecting plate (5) can extend and retract along the first direction.

7. The detection device according to claim 3, characterized in that, The first proximity switch (6) and the second proximity switch (7) are detachably mounted on the first mounting base (8) and the second mounting base (9). The first mounting base (8) and the second mounting base (9) are provided with a plurality of mounting positions for mounting the first proximity switch (6) or the second proximity switch (7).

8. The detection device according to claim 1, characterized in that, The first detection block (41) and the first connecting plate (4) are detachably connected, and the second detection block and the second connecting plate (5) are detachably connected to adjust the position of the first detection block (41) and the second detection block on the first connecting plate (4) or the second connecting plate (5).

9. A crane, characterized in that, The crane includes a frame (1), a first track (2) and a second track (3); the first track (2) and the second track (3) are spaced apart on both sides of the frame (1) along a first direction; the first track (2) and the second track (3) are adapted to move away from or close to each other so that the crane can switch between wide-gauge and narrow-gauge working conditions; the crane also includes a first connecting plate (4); one end of the first connecting plate (4) is disposed on the first track (2) and the other end extends toward the side close to the second track (3); a second connecting plate (5) is disposed on the second track (3) and the other end extends toward the side close to the first track (2); and also includes a detection device as described in any one of claims 1 to 8.

10. The crane according to claim 9, characterized in that, The first proximity switch (6) and the second proximity switch (7) are both electrically connected to the control system of the crane, which is used to control the movement of the first connecting plate (4) and the second connecting plate (5) along the first direction.

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