Single-beam crane with adjusting structure

Abstract

The utility model relates to the technical field of single-beam cranes, and discloses a single-beam crane with an adjusting structure, which comprises two support adjusting mechanisms, two angle adjusting mechanisms and a guide mechanism, the two adjusting seats are slidably connected to the two sides of the top of the supporting plate correspondingly, the two guide blocks are fixedly installed on the two sides of the top of the supporting plate correspondingly and located between the two adjusting seats, and the protection plate is in threaded connection to the top of the supporting plate through bolts. According to the single-beam crane with the adjusting structure, the supporting plate and the two adjusting seats are arranged in a matched mode, the positions of the two adjusting seats can be adjusted relatively according to different weighing requirements, then the adjusting seats are matched with the supporting plate, and the effect of adjusting the contact area between the adjusting seats and a track is achieved; the device can meet the requirements of different lifting weights, and meanwhile the rollover prevention capacity of the device can be improved.

Description

Technical Field

[0001] This utility model relates to the field of single-girder crane technology, specifically a single-girder crane with an adjustable structure. Background Technology

[0002] In industrial production, logistics and other fields, single-girder cranes have become indispensable equipment due to their efficient material handling capabilities. However, traditional single-girder cranes have revealed many limitations in practical applications.

[0003] On the one hand, the fixed support structure of traditional single-girder cranes makes it impossible to flexibly adjust the contact area with the rail according to changes in the lifting weight. When lifting heavy objects, the limited contact area not only makes it difficult to meet the needs of overweight lifting, but also poses a risk of tipping over, seriously threatening operational safety. On the other hand, the fixed installation angle of the support beam of traditional single-girder cranes makes it difficult to work properly in positions where the installation is not level. Therefore, existing single-girder cranes are difficult to adapt to complex installation environments and diverse lifting tasks, limiting the operating range and flexibility of the equipment. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a single-beam crane with an adjustable structure, which solves the problems of limited support area and inability to adjust support angle in the prior art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a single-girder crane with an adjustable structure, comprising two support adjustment mechanisms, two angle adjustment mechanisms, and a guide mechanism, wherein:

[0008] The support adjustment mechanism includes a support plate, two adjustment seats, two guide blocks, and a protective plate. The two adjustment seats are slidably connected to both sides of the top of the support plate, and the two guide blocks are fixedly installed on both sides of the top of the support plate and located between the two adjustment seats. The protective plate is connected to the top of the support plate by bolts.

[0009] The two angle adjustment mechanisms are respectively disposed on the top of the two support adjustment mechanisms;

[0010] The angle adjustment mechanism includes a positioning frame, two positioning shafts and two fixing discs. The positioning frame is detachably connected to the top of the protective plate. The two positioning shafts are rotatably connected to the inner side wall of the positioning frame. The two fixing discs are detachably connected to the ends of the two positioning shafts and are located on the outside of the positioning frame.

[0011] The guide mechanism is positioned above the two angle adjustment mechanisms at both ends. The guide mechanism includes a support beam, and the two sides of one end of the support beam are detachably connected to the outer walls of the two positioning shafts.

[0012] Optionally, the support adjustment mechanism further includes two fixed seats, two threaded rods, two first motors, and two guide rods. The two fixed seats are fixedly installed in the middle of the top of the support plate. The two threaded rods are rotatably connected to one side of the outer surface of the two fixed seats. The two first motors are fixedly installed on the other side of the outer surface of the two fixed seats. The two guide rods are fixedly installed on one side of the outer surface of the fixed seats and located on one side of the two threaded rods.

[0013] Optionally, the support adjustment mechanism further includes four drive wheels, two second motors, and two auxiliary wheels. The four drive wheels are rotatably connected to the ends of the two adjustment seats, the two second motors are fixedly installed on the outer walls of two of the drive wheels, and the two auxiliary wheels are rotatably connected to one side of the two fixed seats and located on the other side of the two guide blocks.

[0014] Optionally, the angle adjustment mechanism further includes a support plate and two fixing plates. The support plate is detachably connected to the top of the protective plate by bolts, and the two fixing plates are respectively fixedly connected to the ends of the two positioning shafts.

[0015] Optionally, the angle adjustment mechanism further includes two fixed columns and multiple fixed bolts. One end of each of the two fixed columns is fixedly installed on the outer wall of the two fixed plates. The outer surfaces of the two fixed columns are respectively inserted into the ends of the two positioning shafts. The multiple fixed bolts are threaded through the outer walls of the two fixed plates. One end of each of the multiple fixed bolts protruding from the fixed columns is threadedly connected to the outer surface of the fixed plate. One end of each of the multiple fixed bolts protruding from the fixed plate is threadedly connected to the outer wall of the supporting beam.

[0016] Optionally, the guiding mechanism further includes two first guide grooves, two second guide grooves, and two racks. The two first guide grooves are respectively opened above the two sides of the outer surface of the supporting beam, the two second guide grooves are respectively opened below the two sides of the outer surface of the supporting beam, and the two racks are respectively fixedly installed on the inner bottom wall of the two first guide grooves.

[0017] Optionally, a driving mechanism is provided at the bottom of the supporting beam. The driving mechanism includes a mounting plate, two fixing frames, two first guide wheels, four second guide wheels, two third guide wheels, and four third motors. The two fixing frames are respectively fixedly installed on both sides of the top of the mounting plate. The two first guide wheels are rotatably connected to the upper part of the inner sidewall of one of the fixing frames. The four second guide wheels are rotatably connected to the lower part of the inner sidewall of the two fixing frames. The two third guide wheels are rotatably connected to the upper part of the inner sidewall of the other fixing frame. The outer surfaces of the two third guide wheels mesh with the outer surface of the rack. The four third motors are respectively fixedly installed on the outer surface of the other fixing frame. The output ends of two of the third motors are respectively connected to the outer walls of the two third guide wheels via key transmission, and the output ends of the other two third motors are respectively connected to the outer walls of the two second guide wheels via key transmission.

[0018] Optionally, a lifting mechanism is provided at the bottom of the mounting plate. The lifting mechanism includes a mounting frame, a heavy-duty motor, a take-up roller, and a steel cable. The top of the mounting frame is fixedly connected to the bottom of the mounting plate. The heavy-duty motor is fixedly installed on the outer wall of the mounting frame. The output end of the heavy-duty motor is connected to the end of the take-up roller via a key drive. The steel cable is wound around the outer surface of the take-up roller.

[0019] (III) Beneficial Effects

[0020] This utility model provides a single-girder crane with an adjustable structure, which has the following advantages:

[0021] 1. This single-girder crane with an adjustable structure, through the cooperation of a support plate and two adjusting seats, can adjust the relative positions of the two adjusting seats according to different weighing requirements, thereby cooperating with the support plate to adjust the contact area between the crane and the rail. This allows the device to meet the needs of different lifting weights and also improves the anti-tipping capability of the device.

[0022] 2. This single-girder crane with an adjustable structure, through the coordinated arrangement of a positioning frame, a positioning shaft, and a fixed plate, can adjust the installation angle of the support beam to different degrees according to the different installation positions on both sides. Furthermore, with the secure connection between the fixed plate and the positioning shaft, the adjusted support beam is installed at a fixed angle on the inner wall of the positioning frame using multiple bolts, thereby achieving the effect of adjusting the support angle. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall installation structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the installation structure of the angle adjustment mechanism of this utility model;

[0025] Figure 3 This is a schematic diagram of the installation structure of the protective plate of this utility model;

[0026] Figure 4 This is an exploded view of the support and adjustment mechanism of this utility model;

[0027] Figure 5 This is an exploded view of the angle adjustment mechanism of this utility model;

[0028] Figure 6 This is a schematic diagram of the guiding mechanism structure of this utility model;

[0029] Figure 7 This is a schematic diagram of the installation structure of the drive mechanism and lifting mechanism of this utility model.

[0030] In the diagram: 1. Support and adjustment mechanism; 101. Support plate; 102. Fixed seat; 103. Threaded rod; 104. First motor; 105. Guide rod; 106. Adjustment seat; 107. Drive wheel; 108. Second motor; 109. Auxiliary wheel; 1010. Guide block; 1011. Protective plate; 2. Angle adjustment mechanism; 201. Support plate; 202. Positioning frame; 203. Positioning shaft; 204. Fixed plate; 205. Fixed disc; 206. 207. Fixed column; 3. Fixed bolt; 4. Guide mechanism; 301. Support beam; 302. First guide groove; 303. Second guide groove; 304. Rack; 5. Drive mechanism; 401. Mounting plate; 402. Fixed frame; 403. First guide wheel; 404. Second guide wheel; 405. Third guide wheel; 406. Third motor; 6. Lifting mechanism; 501. Mounting frame; 502. Heavy-duty motor; 503. Take-up roller; 504. Steel cable. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0032] Please see Figures 1 to 7 This utility model embodiment provides a single-girder crane, which is applied to installation scenarios where the rails on both sides are not horizontal. This embodiment improves the structure of the single-girder crane to give it the advantages of adjustable support area and adjustable support angle. Specifically, taking the installation of the single-girder crane in a non-horizontal scenario as an example, as a preferred solution in this embodiment, the single-girder crane is specifically a single-girder crane with an adjustable structure, capable of adjusting its support angle and support area.

[0033] Please see Figures 1 to 7 This utility model provides a technical solution: a single-girder crane with an adjustable structure, which is used in installation scenarios where the rails on both sides are not horizontal.

[0034] It includes two support adjustment mechanisms 1, two angle adjustment mechanisms 2, and a guide mechanism 3, wherein:

[0035] The support adjustment mechanism 1 includes a support plate 101, two adjustment seats 106, two guide blocks 1010, and a protective plate 1011. The two adjustment seats 106 are slidably connected to the two sides of the top of the support plate 101, and the two guide blocks 1010 are fixedly installed on the two sides of the top of the support plate 101 and located between the two adjustment seats 106. The protective plate 1011 is connected to the top of the support plate 101 by bolts.

[0036] Two angle adjustment mechanisms 2 are respectively installed on top of the two supporting adjustment mechanisms 1;

[0037] The angle adjustment mechanism 2 includes a positioning frame 202, two positioning shafts 203 and two fixing plates 205. The positioning frame 202 is detachably connected to the top of the protective plate 1011. The two positioning shafts 203 are rotatably connected to the inner side wall of the positioning frame 202. The two fixing plates 205 are detachably connected to the ends of the two positioning shafts 203 and are located on the outside of the positioning frame 202.

[0038] The two ends of the guide mechanism 3 are respectively located above the two angle adjustment mechanisms 2. The guide mechanism 3 includes a support beam 301, and the two sides of one end of the support beam 301 are detachably connected to the outer walls of the two positioning shafts 203 respectively.

[0039] In this embodiment, the support plate 101 serves as the basic load-bearing component of the support adjustment mechanism 1, providing an installation platform for other components such as the adjustment seat 106 and guide block 1010. It also cooperates with the adjustment seat 106 to adjust the contact area between the crane and the rail, adapting to different lifting weights and enhancing anti-tipping capability. The adjustment seat 106 is slidably connected to both sides of the top of the support plate 101. Its position on the support plate 101 is adjusted according to the lifting weight requirements, thereby changing the contact area between the crane and the rail to meet different lifting conditions and improve equipment stability. The guide block 1010 is fixed to both sides of the top of the support plate 101, located between the two adjustment seats 106, providing guidance for the sliding of the adjustment seat 106, ensuring smooth sliding, avoiding deviation, and improving the accuracy and stability of the adjustment process. The protective plate 1011 is connected to the top of the support plate 101 by bolts. The positioning frame 202 is detachably connected to the top of the protective plate 1011, providing an installation frame for the positioning shaft 203 and the fixing plate 205. It also adjusts the installation angle of the support beam 301 by cooperating with the positioning shaft 203. The positioning shaft 203 is rotatably connected to the inner wall of the positioning frame 202, supporting the fixing plate 205 and the support beam 301, and can rotate within the positioning frame 202, providing rotational freedom for adjusting the angle of the support beam 301. The fixing plate 205 is detachably connected to the end of the positioning shaft 203, located on the outside of the positioning frame 202. Through cooperation with the positioning shaft 203, the fixing plate 204, and the fixing bolts 207, it fixes the support beam 301 at the adjusted angle position, ensuring stable operation of the support beam 301.

[0040] In the above embodiment, as a preferred solution, the support adjustment mechanism 1 further includes two fixed seats 102, two threaded rods 103, two first motors 104, and two guide rods 105. The two fixed seats 102 are fixedly installed in the middle of the top of the support plate 101. The two threaded rods 103 are rotatably connected to one side of the outer surface of the two fixed seats 102. The two first motors 104 are fixedly installed in the other side of the outer surface of the two fixed seats 102. The two guide rods 105 are fixedly installed in one side of the outer surface of the fixed seats 102 and located on one side of the two threaded rods 103. The fixed seats 102 are fixedly installed in the middle of the top of the support plate 101, providing mounting space for the threaded rods 103, the first motors 104, and the guide rods 105. The support ensures the stability of the installation of these components. The threaded rod 103 is rotatably connected to one side of the outer surface of the fixed base 102 and rotates under the drive of the first motor 104. Through the threaded engagement, it pushes the adjusting seat 106 to slide on the support plate 101, realizing precise control of the position of the adjusting seat 106. The first motor 104 is fixedly installed on the other side of the outer surface of the fixed base 102 to provide power for the rotation of the threaded rod 103, thereby driving the adjusting seat 106 to slide and realize the adjustment of the support area. The guide rod 105 is fixedly installed on one side of the outer surface of the fixed base 102 and is arranged in parallel with the threaded rod 103 to further guide the sliding of the adjusting seat 106. The auxiliary guide block 1010 ensures the linear movement of the adjusting seat 106 and improves the adjustment accuracy.

[0041] In the above embodiment, as a preferred solution, the support adjustment mechanism 1 further includes four drive wheels 107, two second motors 108, and two auxiliary wheels 109. The four drive wheels 107 are rotatably connected to the ends of the two adjustment seats 106, and the two second motors 108 are fixedly installed on the outer walls of two of the drive wheels 107. The two auxiliary wheels 109 are rotatably connected to one side of the two fixed seats 102 and located on the other side of the two guide blocks 1010. The four drive wheels 107 are rotatably connected to the ends of the two adjustment seats 106 and rotate under the drive of the second motors 108, providing driving force for the crane to move along the track, enabling it to move flexibly on the track. The second motors 108 are fixedly installed on the outer walls of two of the drive wheels 107, providing rotational power for the drive wheels 107 to achieve autonomous movement of the crane. The auxiliary wheels 109 are rotatably connected to one side of the two fixed seats 102 and located on the other side of the two guide blocks 1010, assisting in supporting the crane, sharing some of the weight, and assisting the drive wheels 107 to ensure the stability of the crane's movement.

[0042] In the above embodiment, as a preferred solution, the angle adjustment mechanism 2 further includes a support plate 201 and two fixing plates 204. The support plate 201 is detachably connected to the top of the protective plate 1011 by bolts. The two fixing plates 204 are respectively fixedly connected to the ends of the two positioning shafts 203. The support plate 201 is detachably connected to the top of the protective plate 1011 by bolts to provide additional support for the positioning frame 202 and enhance the stability of the positioning frame 202 installation. The fixing plates 204 are respectively fixedly connected to the ends of the two positioning shafts 203 and cooperate with the fixing plate 205, the fixing column 206 and the fixing bolt 207 to firmly connect the support beam 301 to the positioning shaft 203, ensuring that the support beam 301 will not loosen after the angle is fixed.

[0043] In the above embodiment, as a preferred embodiment, the angle adjustment mechanism 2 further includes two fixed posts 206 and multiple fixing bolts 207. One end of each of the two fixed posts 206 is fixedly installed on the outer wall of the two fixed plates 205, and the outer surfaces of the two fixed posts 206 are respectively inserted into the ends of the two positioning shafts 203. The multiple fixing bolts 207 are threaded through the outer walls of the two fixed plates 205, and one end of each fixing bolt 207 protruding from the fixed posts 206 is threadedly connected to the outer surface of the fixing plate 204. One end of each fixing bolt 207 protruding from the fixing plate 204 is threadedly connected to the outer surface of the supporting beam 301. The wall thread connection is used. One end of the fixing column 206 is fixedly installed on the outer wall of the fixing plate 205. Its outer surface is inserted into the end of the positioning shaft 203. With the help of the fixing bolt 207, a stable connection is achieved between the fixing plate 205 and the positioning shaft 203. At the same time, it participates in the fixation of the support beam 301. The fixing bolt 207 is threaded through the outer wall of the fixing plate 205, and then passes through the fixing column 206 and the fixing plate 204 in sequence before being threadedly connected to the outer wall of the support beam 301. This tightly connects the fixing plate 205, the fixing column 206, the fixing plate 204 and the support beam 301 together, thereby fixing the angle of the support beam 301.

[0044] In the above embodiments, as a preferred option, the guiding mechanism 3 further includes two first guide grooves 302, two second guide grooves 303, and two racks 304. The two first guide grooves 302 are respectively opened above both sides of the outer surface of the supporting beam 301, and the two second guide grooves 303 are respectively opened below both sides of the outer surface of the supporting beam 301. The two racks 304 are respectively fixedly installed on the inner bottom wall of the two first guide grooves 302. The supporting beam 301 serves as the main body of the guiding mechanism 3, and its two ends are connected to the positioning shafts 203 of the angle adjustment mechanism 2, providing support and guiding reference for the operation of the crane, and providing installation positions for components such as the first guide grooves 302, second guide grooves 303, and racks 304. The first guide groove 302 is located on both sides above the outer surface of the support beam 301, providing a guide track for the guide wheel installed on the drive mechanism 4, guiding the crane to run in a predetermined direction and ensuring smooth operation. The second guide groove 303 is located on both sides below the outer surface of the support beam 301, cooperating with the first guide groove 302 to further constrain the movement of the guide wheel and improve the stability and accuracy of the crane operation. The rack 304 is fixedly installed on the inner bottom wall of the first guide groove 302 and meshes with the outer surface of the third guide wheel 405 in the drive mechanism 4. Driven by the third motor 406, the rack 304 provides driving force to the crane, enabling the crane to move, and thus ensuring accuracy during movement even in an inclined state.

[0045] In the above embodiment, as a preferred embodiment, a driving mechanism 4 is provided at the bottom of the supporting beam 301. The driving mechanism 4 includes a mounting plate 401, two fixing frames 402, two first guide wheels 403, four second guide wheels 404, two third guide wheels 405, and four third motors 406. The two fixing frames 402 are respectively fixedly installed on both sides of the top of the mounting plate 401. The two first guide wheels 403 are rotatably connected to the upper part of the inner side wall of one of the fixing frames 402. The four second guide wheels 404 are rotatably connected to the lower part of the inner side wall of the two fixing frames 402. The two third guide wheels 403 are respectively rotatably connected to the lower part of the inner side wall of the two fixing frames 402. 5 are rotatably connected to the upper part of the inner wall of another fixed frame 402. The outer surfaces of the two third guide wheels 405 mesh with the outer surface of the rack 304. The four third motors 406 are fixedly installed on the outer surface of another fixed frame 402. The output ends of two of the third motors 406 are connected to the outer walls of the two third guide wheels 405 by key transmission. The output ends of the other two third motors 406 are connected to the outer walls of the two second guide wheels 404 by key transmission. The mounting plate 401 provides a mounting platform for the other components of the drive mechanism 4, and connects the entire drive mechanism 4 to the support beam 301. At the bottom, two fixed brackets 402 are respectively fixedly installed on both sides of the top of the mounting plate 401, providing mounting support for the guide wheels and the third motor 406, ensuring the installation stability of these components. The first guide wheel 403 is rotatably connected to the upper inner wall of one of the fixed brackets 402, cooperating with the first guide groove 302 on the support beam 301, providing guidance for the crane's operation and ensuring that the crane moves along the support beam 301. Four second guide wheels 404 are rotatably connected to the lower inner walls of the two fixed brackets 402, cooperating with the second guide groove 303 on the support beam 301, further increasing... To enhance the stability of the crane's operation and prevent it from swaying during operation, the third guide wheel 405 is rotatably connected to the upper inner wall of another fixed frame 402. Its outer surface meshes with the rack 304. Driven by the third motor 406, the crane moves along the support beam 301 through the gear and rack 304 transmission. Four third motors 406 are respectively fixedly installed on the outer surface of another fixed frame 402. Two of them drive the third guide wheel 405 to rotate, and the other two drive the second guide wheel 404 to rotate, providing power for the crane's movement and enabling precise movement of the crane on the support beam 301.

[0046] In the above embodiment, as a preferred option, a lifting mechanism 5 is provided at the bottom of the mounting plate 401. The lifting mechanism 5 includes a mounting frame 501, a heavy-duty motor 502, a take-up roller 503, and a steel cable 504. The top of the mounting frame 501 is fixedly connected to the bottom of the mounting plate 401. The heavy-duty motor 502 is fixedly mounted on the outer wall of the mounting frame 501. The output end of the heavy-duty motor 502 is connected to the end of the take-up roller 503 via a key drive. The steel cable 504 is wound around the outer surface of the take-up roller 503. The top of the mounting frame 501 is fixedly connected to the bottom of the mounting plate 401. The heavy-duty motor 502 and the take-up roller 503 are... The third component provides installation support to ensure the installation stability of the lifting mechanism 5. The heavy-duty motor 502 is fixedly installed on the outer wall of the mounting frame 501, providing strong power for the rotation of the winding roller 503 to meet the lifting requirements of heavier objects. The end of the winding roller 503 is connected to the output end of the heavy-duty motor 502 through a key transmission. Under the drive of the heavy-duty motor 502, it rotates to realize the winding and unwinding of the steel cable 504, thereby completing the lifting and lowering of heavy objects. The steel cable 504 is wound around the outer surface of the winding roller 503, with one end connected to the heavy object. The rotation of the winding roller 503 realizes the lifting and lowering of the heavy object, and it is the direct load-bearing component for lifting heavy objects.

[0047] In this invention, the working steps of the device are as follows:

[0048] 1. According to the lifting weight requirements, start the first motor 104 to drive the threaded rod 103 to rotate. Through the threaded engagement, push the adjusting seat 106 to slide on the support plate 101, adjust the position of the two adjusting seats 106, thereby changing the contact area between the crane and the rail, enhancing the anti-tipping ability, and meeting different lifting conditions.

[0049] 2. Depending on the different installation positions on both sides, rotate the positioning shaft 203 to adjust the installation angle of the support beam 301. Then, fix the support beam 301 at the adjusted angle position using the fixing plate 205, fixing column 206 and fixing bolt 207 to ensure the stable operation of the support beam 301.

[0050] 3. Start the third motor 406. Two of the third motors 406 drive the third guide wheel 405 to rotate, which drives the crane to move along the support beam 301 through the gear and rack 304. The other two third motors 406 drive some of the second guide wheels 404 to rotate. Together with the guiding action of the first guide wheel 403 and the first guide groove 302 and the second guide groove 303, the crane moves smoothly and accurately in the predetermined direction.

[0051] 4. Start the heavy-duty motor 502 to drive the winding roller 503 to rotate, thereby realizing the winding and unwinding of the steel cable 504, thus completing the lifting and lowering operation of the heavy object. During the lifting process, pay attention to the operating status of the crane and the stability of the heavy object.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single-girder crane with an adjustable structure, characterized in that, It includes two support adjustment mechanisms (1), two angle adjustment mechanisms (2), and a guide mechanism (3), wherein: The support adjustment mechanism (1) includes a support plate (101), two adjustment seats (106), two guide blocks (1010), and a protective plate (1011). The two adjustment seats (106) are slidably connected to the two sides of the top of the support plate (101). The two guide blocks (1010) are fixedly installed on the two sides of the top of the support plate (101) and located between the two adjustment seats (106). The protective plate (1011) is connected to the top of the support plate (101) by bolt thread. The two angle adjustment mechanisms (2) are respectively disposed on the top of the two support adjustment mechanisms (1); The angle adjustment mechanism (2) includes a positioning frame (202), two positioning shafts (203) and two fixing discs (205). The positioning frame (202) is detachably connected to the top of the protective plate (1011). The two positioning shafts (203) are rotatably connected to the inner sidewall of the positioning frame (202). The two fixing discs (205) are detachably connected to the ends of the two positioning shafts (203) and located on the outside of the positioning frame (202). The two ends of the guide mechanism (3) are respectively located above the two angle adjustment mechanisms (2). The guide mechanism (3) includes a support beam (301). The two sides of one end of the support beam (301) are detachably connected to the outer walls of the two positioning shafts (203).

2. A single-girder crane with an adjustable structure according to claim 1, characterized in that: The support adjustment mechanism (1) further includes two fixed seats (102), two threaded rods (103), two first motors (104), and two guide rods (105). The two fixed seats (102) are fixedly installed in the middle of the top of the support plate (101). The two threaded rods (103) are rotatably connected to one side of the outer surface of the two fixed seats (102). The two first motors (104) are fixedly installed on the other side of the outer surface of the two fixed seats (102). The two guide rods (105) are fixedly installed on one side of the outer surface of the fixed seats (102) and located on one side of the two threaded rods (103).

3. A single-girder crane with an adjustable structure according to claim 2, characterized in that: The support adjustment mechanism (1) further includes four drive wheels (107), two second motors (108), and two auxiliary wheels (109). The four drive wheels (107) are rotatably connected to the ends of the two adjustment seats (106), the two second motors (108) are fixedly installed on the outer walls of two of the drive wheels (107), and the two auxiliary wheels (109) are rotatably connected to one side of the two fixed seats (102) and located on the other side of the two guide blocks (1010).

4. A single-girder crane with an adjustable structure according to claim 1, characterized in that: The angle adjustment mechanism (2) further includes a support plate (201) and two fixing plates (204). The support plate (201) is detachably connected to the top of the protective plate (1011) by bolts, and the two fixing plates (204) are respectively fixedly connected to the ends of the two positioning shafts (203).

5. A single-girder crane with an adjustable structure according to claim 4, characterized in that: The angle adjustment mechanism (2) further includes two fixed columns (206) and multiple fixed bolts (207). One end of each of the two fixed columns (206) is fixedly installed on the outer wall of the two fixed disks (205). The outer surfaces of the two fixed columns (206) are respectively inserted into the ends of the two positioning shafts (203). The multiple fixed bolts (207) are threaded through the outer walls of the two fixed disks (205). One end of each of the multiple fixed bolts (207) protruding from the fixed column (206) is threadedly connected to the outer surface of the fixed plate (204). One end of each of the multiple fixed bolts (207) protruding from the fixed plate (204) is threadedly connected to the outer wall of the support beam (301).

6. A single-girder crane with an adjustable structure according to claim 1, characterized in that: The guiding mechanism (3) further includes two first guide grooves (302), two second guide grooves (303), and two racks (304). The two first guide grooves (302) are respectively opened on the upper sides of the outer surface of the supporting beam (301), the two second guide grooves (303) are respectively opened on the lower sides of the outer surface of the supporting beam (301), and the two racks (304) are respectively fixedly installed on the inner bottom wall of the two first guide grooves (302).

7. A single-girder crane with an adjustable structure according to claim 6, characterized in that: A drive mechanism (4) is provided at the bottom of the supporting beam (301). The drive mechanism (4) includes a mounting plate (401), two fixing frames (402), two first guide wheels (403), four second guide wheels (404), two third guide wheels (405), and four third motors (406). The two fixing frames (402) are respectively fixedly installed on both sides of the top of the mounting plate (401). The two first guide wheels (403) are rotatably connected to the upper part of the inner side wall of one of the fixing frames (402), and the four second guide wheels (404) are rotatably connected to the two fixing frames (402). Below the inner sidewall, two third guide wheels (405) are rotatably connected to the upper part of the inner sidewall of another fixed frame (402). The outer surfaces of the two third guide wheels (405) mesh with the outer surface of the rack (304). Four third motors (406) are fixedly installed on the outer surface of another fixed frame (402). The output ends of two third motors (406) are connected to the outer walls of the two third guide wheels (405) via key transmission. The output ends of the other two third motors (406) are connected to the outer walls of two of the second guide wheels (404) via key transmission.

8. A single-girder crane with an adjustable structure according to claim 7, characterized in that: The bottom of the mounting plate (401) is provided with a lifting mechanism (5). The lifting mechanism (5) includes a mounting frame (501), a heavy-duty motor (502), a take-up roller (503), and a steel cable (504). The top of the mounting frame (501) is fixedly connected to the bottom of the mounting plate (401). The heavy-duty motor (502) is fixedly installed on the outer wall of the mounting frame (501). The output end of the heavy-duty motor (502) is connected to the end of the take-up roller (503) by a key drive. The steel cable (504) is wound around the outer surface of the take-up roller (503).

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