A safe electric single-beam crane

Abstract

A safe electric single-beam crane effectively solves the problems of complex operation and high cost, which comprises a single main beam, an electric trolley and a supporting leg, the lower end of the supporting leg is fixed with a lower end beam, the front and rear ends of the lower end beam are provided with a cart traveling mechanism, the lower end of the cart traveling mechanism is provided with a track, the end of the cart traveling mechanism is fixed with a supporting plate, the lower end of the supporting plate is fixed with a first support, the first support is rotatably connected with a rotating shaft, the left and right sides of the rotating shaft are provided with a rail clamping mechanism, the rail clamping mechanism comprises a biasing wheel, the biasing wheel is fixedly connected with the rotating shaft in a biasing mode, the lower end of the biasing wheel is in contact with a disc, the disc is coaxially fixed with a first guide column, the first guide column moves up and down in a first sleeve, the first guide column is sleeved with a spring, the first guide column is hingedly connected with a connecting rod, the other end of the connecting rod is hingedly connected with a second guide column, the second guide column moves left and right in a second sleeve, the other end of the second guide column is fixed with a brake block corresponding to the track.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, and in particular relates to a safe electric single-girder crane. Background Technology

[0002] Single-girder cranes are lifting equipment that spans across workshops, warehouses, and material yards for material handling. The bridge of a single-girder bridge crane runs longitudinally along the rails, making full use of the space beneath the bridge for material handling without being obstructed by ground equipment. It is the most widely used and numerous type of lifting machinery. During operation, the trolley traveling mechanism of a single-girder crane needs to be locked to prevent slippage. Existing rail clamping devices generally use electro-hydraulic push rods, which suffer from problems such as large size, complex control, and high cost. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the existing technology, the purpose of this utility model is to provide a safe electric single-girder crane, which effectively solves the problems of complex operation and high cost.

[0004] The technical solution to the technical problem is as follows: It includes a single main beam, an electric trolley, and outriggers. A lower beam is fixed to the lower end of the outriggers. A trolley traveling mechanism is installed at both ends of the lower beam. A track is provided below the trolley traveling mechanism. A support plate is fixed to the end of the trolley traveling mechanism. A first bracket is fixed to the lower end of the support plate. A horizontally oriented rotating shaft is rotatably connected to the first bracket. Rail clamping mechanisms are provided on both sides of the rotating shaft. The rail clamping mechanisms include an offset wheel, which is fixedly offset to the rotating shaft. A disc is contacted at the lower end of the offset wheel. A vertically oriented first guide post is coaxially fixed to the disc. A second bracket is fixed to the lower end of the first bracket. A first sleeve is fixed to the second bracket. The first guide post moves up and down within the first sleeve. A spring is fitted on the first guide post, located between the disc and the first sleeve. A connecting rod is hinged to the first guide post. A horizontally oriented second guide post is hinged to the other end of the connecting rod. A second sleeve is fixed to the second bracket. The second guide post moves left and right within the second sleeve. A brake block corresponding to the track is fixed to the other end of the second guide post.

[0005] Preferably, a worm gear is coaxially fixed to the rotating shaft, and a worm is rotatably connected to the support plate, with the worm meshing with the worm gear.

[0006] This invention has the following advantages over traditional equipment: it is simple to operate, controls the up and down movement of the first guide column through the offset wheel, controls the left and right movement of the second guide column and the brake block under the action of the connecting rod, and realizes the simultaneous clamping or releasing of the track by the brake blocks on both sides under the action of the spring. It has good linkage effect, ingenious structure, low cost, and is safe and stable. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the front view of this utility model; Figure 2 This is a schematic diagram of the left view of this utility model; Figure 3 This is a schematic diagram of the main view of the rail clamping mechanism in this utility model; Figure 4 This is a schematic diagram of the left view of the rail clamping mechanism in this utility model.

[0008] Reference numerals: 1. Single main beam; 2. Electric trolley; 3. Outrigger; 4. Lower end beam; 5. Trolley traveling mechanism; 6. Track; 7. Support plate; 8. First bracket; 9. Rotating shaft; 10. Offset wheel; 11. Disc; 12. First guide post; 13. Second bracket; 14. First sleeve; 15. Spring; 16. Connecting rod; 17. Second guide post; 18. Second sleeve; 19. Brake block; 20. Worm gear; 21. Worm. Detailed Implementation

[0009] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0010] Depend on Figures 1 to 4 Provided is a safe electric single-girder crane, comprising a single main beam 1, an electric trolley 2, and outriggers 3. A lower end beam 4 is fixed to the lower end of the outriggers 3. A trolley traveling mechanism 5 is installed at both ends of the lower end beam 4. A rail 6 is provided below the trolley traveling mechanism 5. A support plate 7 is fixed to the end of the trolley traveling mechanism 5. A first bracket 8 is fixed to the lower end of the support plate 7. A horizontally oriented rotating shaft 9 is rotatably connected to the first bracket 8. Rail clamping mechanisms are provided on both sides of the rotating shaft 9. The rail clamping mechanisms include offset wheels 10, which are offset and fixedly connected to the rotating shaft 9. A disc 11 is in contact with the lower end of the offset wheel 10. A vertical... A first guide post 12 is in the vertical direction. A second support 13 is fixed to the lower end of the first bracket 8. A first sleeve 14 is fixed on the second support 13. The first guide post 12 moves up and down inside the first sleeve 14. A spring 15 is sleeved on the first guide post 12. The spring 15 is located between the disc 11 and the first sleeve 14. A connecting rod 16 is hinged to the first guide post 12. A second guide post 17 is hinged to the other end of the connecting rod 16 in the horizontal direction. A second sleeve 18 is fixed on the second bracket 13. The second guide post 17 moves left and right inside the second sleeve 18. A brake block 19 corresponding to the track 6 is fixed to the other end of the second guide post 17.

[0011] The rotating shaft 9 is coaxially fixed with a worm gear 20, and a worm 21 is rotatably connected to the support plate 7, with the worm 21 meshing with the worm gear 20.

[0012] In use, the electric trolley 2 runs left and right on the single main beam 1. The trolley traveling mechanism 5 drives the lower end beam 4, support legs 3, single main beam 1, and electric lower trolley as a whole to run back and forth on the track 6. When the trolley traveling mechanism 5 needs to be braked and locked, a handle is installed on the worm gear 21. Turning the handle drives the worm gear 21 to rotate, which in turn drives the worm wheel 20 to rotate. The worm wheel 20 drives the rotating shaft 9 to rotate coaxially. The rotating shaft 9 drives the offset wheels 10 on the left and right clamping rail mechanisms to rotate offset. The offset wheels 10 press the disc 11 downward, and the disc 11 drives the first guide column 12 to move downward within the first sleeve 14. When the spring 15 is in a state of continuous compression, the first sleeve 14 improves the stability of the first guide column 12 moving downward. Under the action of the connecting rod 16, the first guide column 12 drives the second guide column 17 to move towards the track 6. The second guide column 17 moves horizontally towards the track 6 inside the second sleeve 18. The second guide column 17 drives the brake block 19 to move closer to the track 6, so that the brake blocks 19 on both sides of the track 6 clamp the track 6 at the same time, thereby braking and locking the trolley traveling mechanism 5. It is safe and stable. The lead angle of the worm is smaller than the equivalent friction angle between the meshing gear teeth. The worm gear mechanism has self-locking properties, ingenious structure, and good reliability. When the trolley traveling mechanism 5 needs to run, the worm gear 21 is reversed, which drives the worm wheel 20 to reverse, which in turn drives the rotating shaft 9 to reverse, and the rotating shaft 9 drives the offset wheel 10 to reset. Under the action of the spring 15, the first guide post 12 is reset, and under the action of the connecting rod 16, the second guide post 17 drives the brake block 19 to reset. Then the rail clamping mechanism releases the rail 6, and the trolley traveling mechanism 5 runs normally. It is simple to operate and convenient to use.

[0013] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. 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. A safe electric single-girder crane, comprising a single main beam (1), an electric trolley (2), and outriggers (3), wherein a lower end beam (4) is fixed to the lower end of the outriggers (3), and a trolley traveling mechanism (5) is installed at both the front and rear ends of the lower end beam (4), and a rail (6) is provided below the trolley traveling mechanism (5), characterized in that, A support plate (7) is fixed to the end of the traveling mechanism (5). A first bracket (8) is fixed to the lower end of the support plate (7). A horizontally arranged rotating shaft (9) is rotatably connected to the first bracket (8). A rail clamping mechanism is provided on the left and right sides of the rotating shaft (9). The rail clamping mechanism includes an offset wheel (10). The offset wheel (10) is fixedly offset to the rotating shaft (9). A disc (11) is in contact with the lower end of the offset wheel (10). A first vertical guide post (12) is coaxially fixed to the disc (11). A second bracket (13) is fixed to the lower end of the first bracket (8). A first set of The first guide post (12) moves up and down inside the first sleeve (14). A spring (15) is fitted on the first guide post (12). The spring (15) is located between the disc (11) and the first sleeve (14). The first guide post (12) is hinged to a connecting rod (16). The other end of the connecting rod (16) is hinged to a second guide post (17) set in a horizontal direction. The second sleeve (18) is fixed on the second bracket (13). The second guide post (17) moves left and right inside the second sleeve (18). The other end of the second guide post (17) is fixed to a brake block (19) corresponding to the track (6).

2. A safety-type electric single-girder crane according to claim 1, characterized in that, The rotating shaft (9) is coaxially fixed with a worm wheel (20), and a worm (21) is rotatably connected to the support plate (7), with the worm (21) meshing with the worm wheel (20).

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