Electric single-beam crane with safety protection structure

Abstract

The utility model discloses an electric single-beam crane with a safety protection structure, which comprises a main beam and a cart traveling mechanism, tracks are mounted on two sides of the main beam, a trolley traveling mechanism is mounted on the tracks, the trolley traveling mechanism comprises a mounting plate, traveling wheels are rotatably connected onto the mounting plate, a mounting box is fixedly connected to the bottom of the mounting plate, and the cart traveling mechanism is mounted on the mounting box. The mounting box is of a cavity structure with an opening in the bottom, a winding drum is fixedly connected into the mounting box, and a steel wire rope of the winding drum penetrates through the opening to be connected with a hook. A fixing plate is mounted at the top of the mounting box, a cleaning roller matched with the track is fixedly connected to the fixing plate, and bristles are fixedly connected to the cleaning roller in the circumferential direction of the cleaning roller; buffering devices are mounted at the bottom of the mounting box. The opening is formed in the bottom of the mounting box, on one hand, the steel wire rope can penetrate through the opening conveniently and can move in the horizontal direction under the action of the rope guide, on the other hand, a heat dissipation channel is provided for the winding drum through the opening, and heat accumulation in the mounting box is reduced.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to an electric single-girder crane with a safety protection structure. Background Technology

[0002] Electric single-girder cranes are lifting equipment that spans across workshops, warehouses, or material yards to lift and transport materials. Because they have a single main beam, they are called single-girder cranes. Single-girder cranes consume less material and can make full use of the space in the workshop to lift and transport materials. They are the most widely used and numerous type of lifting machinery.

[0003] Existing electric single-girder cranes experience numerous problems during operation, such as hook overshoot, especially when the hook is suspending a heavy load. Hook overshoot causes significant impact on the electric hoist, affecting its lifespan. To prevent hook overshoot, current electric single-girder cranes use protective housings on the outside of the electric hoist. For example, Chinese patent CN218025082U discloses an electric single-girder crane where the drum is placed inside a closed housing with only an opening at the bottom for the wire rope to pass through. However, the drum relies on a motor to drive the wire rope during operation, generating a large amount of heat. The closed housing structure cannot effectively dissipate heat from the motor, thus affecting its lifespan to some extent. Utility Model Content

[0004] This utility model provides an electric single-girder crane with a safety protection structure to solve the above-mentioned problems.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an electric single-girder crane with a safety protection structure, including a horizontally arranged main beam, end beams fixedly connected to the bottom of both ends of the main beam, a trolley traveling mechanism installed on the end beams, horizontally arranged rails installed on both sides of the main beam along its length, a trolley traveling mechanism installed on the rails, the trolley traveling mechanism including a mounting plate, a traveling wheel rotatably connected to the mounting plate, the traveling wheel rolling along the rails, a drive motor fixedly connected to one of the mounting plates, the drive motor being connected to one of the traveling wheels, a mounting box fixedly connected to the bottom of the mounting plate, the mounting box being a hollow structure with an opening at the bottom, a drum fixedly connected inside the mounting box, the wire rope of the drum passing through the opening at the bottom of the mounting box and connected to a hook through a movable pulley;

[0006] The top of the mounting box is detachably fixed with a vertically installed fixing plate, on which a cleaning roller adapted to the track is fixedly connected. Brush bristles are fixedly connected along the circumference of the cleaning roller. A buffer device is installed at the bottom of the mounting box.

[0007] Preferably, fans are installed at both ends of the mounting box; the fixing plates are located at the four corners of the top of the mounting box, and the four fixing plates are symmetrically arranged on both sides of the main beam in pairs, with the two fixing plates on the same side of the main beam located on both sides of the mounting plate respectively.

[0008] Preferably, the two symmetrically arranged fixing plates are fixedly connected by a connecting plate, the connecting plate is located below the main beam, and an inclined guide plate is fixedly connected to the side of the connecting plate away from the mounting plate.

[0009] Preferably, the top of each fixed plate extends above the main beam, and a horizontally arranged extension plate is fixedly connected to the top of the fixed plate. The extension plate extends above the main beam and a roller is rotatably connected to the extension plate, and the roller is in rolling connection with the main beam.

[0010] Preferably, limit posts are fixedly connected to both sides of the top of the main beam. The limit posts are set along the length of the main beam. A limit groove adapted to the roller is opened on the side of the limit post away from the fixed plate. The roller is rolled and connected in the limit groove.

[0011] Preferably, the buffer device includes two spaced-apart mounting posts, with a horizontally positioned limiting rod fixedly connected between the two mounting posts. A vertically positioned guide post is fixedly connected to the top of each mounting post, the top of which passes through the mounting box and extends into the box. The guide post is slidably connected to the bottom wall of the mounting box. A contact piece is fixedly connected to the top of the guide post inside the mounting box, and a corresponding limit switch is fixedly connected inside the mounting box above the contact piece. A compression spring is also fixedly connected between the mounting box and the mounting posts, and the compression spring is sleeved on the guide post.

[0012] Preferably, there are two limiting rods, and guide rollers are rotatably connected to the limiting rods. The two guide rollers are spaced apart, and the wire rope passes through the gap between the two guide rollers and is connected to the hook.

[0013] Preferably, the fixing plate has a strip-shaped hole, the central axis of the strip-shaped hole along the length direction is parallel to the central axis of the main beam along the length direction, and the cleaning roller is fixedly connected to the strip-shaped hole by bolts.

[0014] The beneficial effects of this utility model are as follows: (1) By opening an opening at the bottom of the mounting box, it is convenient for the wire rope to pass through and the wire rope can move horizontally under the action of the rope guide. On the other hand, the opening provides a heat dissipation channel for the drum, reducing the accumulation of heat inside the mounting box. (2) By installing a fixing plate on the top of the mounting box and fixing a cleaning roller on the fixing plate, it is convenient to clean foreign objects on the track by the brush on the cleaning roller, thereby reducing the impact of foreign objects on the traveling wheels and improving the stability of the trolley traveling mechanism. (3) A buffer device is installed at the bottom of the mounting box to reduce the impact on the mounting box when the hook hits the top, thereby further improving the safety of the drum. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the connection relationship between the fixed plate, the walking mechanism, and the mounting box of this utility model;

[0017] Figure 3 This is a schematic diagram showing the connection relationship between the fixing plate, the cleaning roller, and the main beam of this utility model;

[0018] Figure 4 This is a schematic diagram of the installation box and buffer device of this utility model;

[0019] Figure 5 This is a schematic diagram showing the connection relationship between the guide roller and the mounting column of this utility model. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings.

[0021] An electric single-girder crane with a safety protection structure, such as Figures 1-5As shown, the crane includes a horizontally arranged main beam 1, with end beams fixedly connected to the bottom of both ends of the main beam 1. A trolley traveling mechanism 2 is mounted on the end beams. The trolley traveling mechanism 2 is existing technology and will not be described in detail here. Horizontally arranged rails 3 are installed on both sides of the main beam 1 along its length. A trolley traveling mechanism is mounted on the rails 3. The trolley traveling mechanism includes a vertically arranged mounting plate 4, with traveling wheels 5 rotatably connected to the mounting plate 4. The traveling wheels 5 roll along the rails 3. A drive motor is fixedly connected to one of the mounting plates 4, and the drive motor is connected to one of the traveling wheels 5 via a transmission connection. The transmission connection method between the drive motor and the traveling wheel 5 is existing technology and will not be described in detail here. In use, the drive motor drives the traveling wheel 5 to rotate, thereby causing the trolley traveling mechanism to move horizontally along the rails 3. A mounting box 6 is fixedly connected to the bottom of the mounting plate 4. The mounting box 6 is a hollow structure with an opening 8 at the bottom. A drum 7 is fixedly connected inside the mounting box 6, and the drum 7 is driven to rotate by a motor. This is existing technology and will not be described in detail here. The wire rope of the drum 7 passes through the opening 8 at the bottom of the mounting box 6 and is connected to the hook 26 via a movable pulley. The width of the opening 8 is smaller than the diameter of the movable pulley to prevent the movable pulley from entering the mounting box 6 through the opening 8 and damaging the drum 7. The opening 8 facilitates the passage of the wire rope and allows it to move horizontally under the action of the rope guide. Furthermore, the opening 8 provides a heat dissipation channel for the drum 7, reducing heat accumulation inside the mounting box 6. A vertically mounted fixing plate 9 is detachably fixed to the top of the mounting box 6. A cleaning roller 10 adapted to the track 3 is fixedly connected to the fixing plate 9, and bristles 11 are fixedly connected to the cleaning roller 10 along its circumference. Since electric single-girder cranes are often used in production workshops and other similar locations, foreign objects and dust generated during production will fall onto the track 3. As the traveling wheels 5 move along the track 3, these foreign objects can cause them to wobble or even tilt, increasing safety hazards. By installing a fixing plate 9 on the top of the mounting box 6 and fixing a cleaning roller 10 to it, the brush bristles 11 on the cleaning roller 10 can easily clean the foreign objects from the track 3, reducing the impact of foreign objects on the traveling wheels 5 and improving the stability of the trolley's traveling mechanism. Furthermore, the fixing plate 9 and the mounting box 6 can be detachably fixed using bolts, clips, etc. This detachable connection facilitates the removal of the fixing plate 9, making it easy to replace and clean the cleaning roller 10. This prevents the brush bristles 11 from wearing down after long-term use and becoming unable to clean the track 3, thus reducing production costs. In addition, a buffer device is installed at the bottom of the mounting box 6. The installation of the mounting box 6 reduces the impact of the hook 26 on the drum 7 when it hits the top to a certain extent. The buffer device further reduces the impact of the hook 26 on the mounting box 6 when it hits the top, thereby further improving the safety of the drum 7.

[0022] In another embodiment, fans 12 are installed at both ends of the mounting box 6. The fans 12 further improve the heat dissipation of the mounting box 6 and reduce heat accumulation inside the mounting box 6. The fixing plates 9 are located at the four corners of the top of the mounting box 6, with the four fixing plates 9 symmetrically arranged in pairs on both sides of the main beam 1. The two fixing plates 9 on the same side of the main beam 1 are respectively located on both sides of the mounting plate 4. By installing fixing plates 9 at the four corners of the top of the mounting box 6, cleaning rollers 10 can be installed on the tracks 3 on both sides of the main beam 1. Regardless of whether the trolley travel mechanism moves to the left or right along the main beam 1, a cleaning roller 10 is always positioned in front of the traveling wheels 5 to clean the tracks 3, reducing the occurrence of jamming or other issues caused by foreign objects in the trolley travel mechanism, and improving safety and stability.

[0023] In another embodiment, two symmetrically arranged fixed plates 9 are fixedly connected by a connecting plate 13. The connecting plate 13 is located below the main beam 1, and an inclined guide plate 14 is fixedly connected to the side of the connecting plate 13 away from the mounting plate 4. The guide plate 14 extends to the outside of the fixed plate 9. After being cleaned by the brush, some of the foreign objects and dust will accumulate at both ends of the track 3, while some will fall off during the cleaning process. By setting the connecting plate 13, the dust that falls off during the cleaning process can fall onto the connecting plate 13. The setting of the guide plate 14 facilitates the increase of the dust holding capacity and bearing range of the connecting plate 13.

[0024] In another embodiment, the top of each fixing plate 9 extends above the main beam 1, and a horizontally arranged extension plate 15 is fixedly connected to the top of the fixing plate 9. The extension plate 15 extends above the main beam 1, and a roller 16 is rotatably connected to the extension plate 15, with the roller 16 in a rolling connection with the main beam 1. The roller 16 facilitates the limitation of the position between the fixing plate 9 and the main beam 1, improving the stability of the fixing plate 9's position and, to a certain extent, also improving the stability of the connection between the mounting box 6 and the main beam 1.

[0025] In another embodiment, limiting posts 27 are fixedly connected to both sides of the top of the main beam 1. The limiting posts 27 are arranged along the length of the main beam 1. On the side of the limiting post 27 away from the fixing plate 9, a limiting groove adapted to the roller 16 is opened along its length. The roller 16 is tumbling within the limiting groove. Correspondingly, the extension plate 15 is L-shaped. The setting of the limiting posts 27 improves the rigidity of the main beam 1 to a certain extent. On the other hand, the limiting groove is opened on the limiting post, avoiding the setting of slots on the main beam 1, further ensuring the rigidity of the main beam 1. The setting of the limiting groove and the roller 16 also improves the stability of the connection between the fixing plate 9 and the main beam 1.

[0026] In another embodiment, the buffer device includes two spaced-apart mounting posts 17 located below the openings 8 of the mounting box 6. A horizontally positioned limiting rod 18 is fixedly connected between the two mounting posts 17. A vertically positioned guide post 19 is fixedly connected to the top of each of the two mounting posts 17. The top of the guide post 19 passes through the mounting box 6 and extends into the mounting box 6, and the guide post 19 is slidably connected to the bottom wall of the mounting box 6. A contact piece 20 is fixedly connected to the top of the guide post 19 located inside the mounting box 6. A limit switch 21 corresponding to the contact piece 20 is fixedly connected inside the mounting box 6 above the contact piece 20. A compression spring 22 is also fixedly connected between the mounting box 6 and the mounting posts 17, and the compression spring 22 is sleeved on the guide post 19. The limit rod 18 is designed to block and limit the hook 26, reducing the impact of the hook 26 on the drum 7. When the top of the hook 26 touches the limit rod 18 and continues to move upward, the mounting column 17 drives the guide column 19 to move upward, which in turn causes the contact piece 20 to approach the limit switch 21. The limit switch 21 sends a signal to the controller to close the drum 7. At the same time, under the action of the compression spring 22, the guide column 19 returns to its original position, reducing the impact of the hook 26 on the drum 7.

[0027] In another embodiment, there are two limiting rods 18, and guide rollers 23 are rotatably connected to the limiting rods 18. The two guide rollers 23 are spaced apart, and the wire rope passes through the gap between the two guide rollers 23 and is connected to the hook 26. The guide rollers 23 can be made of rubber. The guide rollers 23 facilitate the guidance of the wire rope, and the rubber material of the guide rollers 23 also helps to reduce wear on the hook 26.

[0028] In another embodiment, a strip-shaped hole 24 is provided on the fixing plate 9. The central axis of the strip-shaped hole 24 along its length is parallel to the central axis of the main beam 1 along its length. The cleaning roller 10 is fixedly connected to the strip-shaped hole 24 by bolts 25, and the bolts 25 are located on both sides of the fixing plate 9. By setting the strip-shaped hole 24, the distance between the cleaning roller 10 and the traveling wheel 5 can be adjusted as needed during installation. When the cleaning roller 10 is close to the traveling wheel 5, the outer edge of the traveling wheel 5 can be cleaned by the brush, reducing foreign objects on the outer edge of the traveling wheel 5, thereby further reducing the occurrence of jamming of the traveling wheel 5 during travel. If it is not necessary to clean the traveling wheel 5, the cleaning roller 10 can be set away from the traveling wheel 5.

[0029] The above embodiments are not intended to limit the shape, material, structure, etc. of this utility model in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. An electric single-girder crane with a safety protection structure, comprising a horizontally arranged main beam, end beams fixedly connected to the bottom of both ends of the main beam, a trolley traveling mechanism mounted on the end beams, horizontally arranged rails mounted on both sides of the main beam along its length, a trolley traveling mechanism mounted on the rails, the trolley traveling mechanism comprising a mounting plate, a traveling wheel rotatably connected to the mounting plate, the traveling wheel rolling along the rails, a drive motor fixedly connected to one of the mounting plates, the drive motor being drively connected to one of the traveling wheels, characterized in that: The mounting plate is fixedly connected to the bottom of the mounting box, which is a hollow structure with an opening at the bottom. A drum is fixedly connected inside the mounting box, and the steel wire rope of the drum passes through the opening at the bottom of the mounting box and is connected to a hook through a movable pulley. The top of the mounting box is detachably fixed with a vertically installed fixing plate, on which a cleaning roller adapted to the track is fixedly connected. Brush bristles are fixedly connected along the circumference of the cleaning roller. A buffer device is installed at the bottom of the mounting box.

2. The electric single-girder crane with a safety protection structure according to claim 1, characterized in that: Fans are installed at both ends of the mounting box; the fixing plates are located at the four corners of the top of the mounting box, and the four fixing plates are symmetrically arranged on both sides of the main beam in pairs. The two fixing plates on the same side of the main beam are located on both sides of the mounting plate respectively.

3. An electric single-girder crane with a safety protection structure according to claim 2, characterized in that: Two symmetrically arranged fixed plates are fixedly connected by a connecting plate. The connecting plate is located below the main beam, and an inclined guide plate is fixedly connected to the side of the connecting plate away from the mounting plate.

4. An electric single-girder crane with a safety protection structure according to claim 3, characterized in that: Each fixed plate extends above the main beam at its top, and a horizontally set extension plate is fixedly connected to the top of the fixed plate. The extension plate extends above the main beam and a roller is rotatably connected to the extension plate, and the roller is in rolling connection with the main beam.

5. An electric single-girder crane with a safety protection structure according to claim 4, characterized in that: Limiting columns are fixedly connected to both sides of the top of the main beam. The limiting columns are set along the length of the main beam. A limiting groove adapted to the roller is opened on the side of the limiting column away from the fixed plate. The roller is rolled and connected in the limiting groove.

6. An electric single-girder crane with a safety protection structure according to claim 1, characterized in that: The buffer device includes two spaced-apart mounting posts, with a horizontally positioned limiting rod fixedly connected between them. A vertically positioned guide post is fixedly connected to the top of each mounting post, with the top of the guide post passing through the mounting box and extending into it. The guide post is slidably connected to the bottom wall of the mounting box. A contact piece is fixedly connected to the top of the guide post inside the mounting box, and a corresponding limit switch is fixedly connected inside the mounting box above the contact piece. A compression spring is also fixedly connected between the mounting box and the mounting posts, and the compression spring is sleeved on the guide post.

7. An electric single-girder crane with a safety protection structure according to claim 6, characterized in that: There are two limiting rods, and guide rollers are rotatably connected to the limiting rods. The two guide rollers are spaced apart, and the wire rope passes through the gap between the two guide rollers and is connected to the hook.

8. An electric single-girder crane with a safety protection structure according to claim 3, characterized in that: The fixed plate has a strip-shaped hole, and the central axis of the strip-shaped hole along the length direction is parallel to the central axis of the main beam along the length direction. The cleaning roller is fixedly connected to the strip-shaped hole by bolts.

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