Single-beam bridge crane

Abstract

The utility model discloses a single-beam bridge crane, which relates to the technical field of cranes, and comprises a bottom plate and two upright posts, the two upright posts are fixedly arranged on the two sides of the upper surface of the bottom plate, the upper ends of the two upright posts are movably sleeved with sliding sleeves, a sliding rail is fixedly arranged between the two sliding sleeves, the middle part of the sliding rail is movably sleeved with a sliding block, and the sliding block is fixedly arranged on the bottom plate. An electric hoist is fixedly arranged on the lower side of the sliding block, a lifting rope is arranged below the electric hoist, and a lifting hook is fixedly arranged at the lower end of the lifting rope; and a fixing block is fixedly arranged on the lower side of the sliding sleeve, supporting rods are rotationally connected to the rear side of the fixing block through shaft pins, strip-shaped openings are formed in the surfaces of the supporting rods, and a transmission mechanism for driving the two supporting rods to rotate is arranged on the upper surface of the bottom plate. The electric hoist can be replaced in a time-saving and labor-saving mode, high-altitude operation is not needed, and potential safety hazards can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a single-girder overhead crane. Background Art

[0002] Welded steel pipes, also known as welded pipes, are steel pipes made by welding steel plates or strips after curling. Due to their large mass, in the production process, a single-girder overhead crane is often needed to carry them.

[0003] During the use of traditional single-girder overhead cranes, due to their long-term high-load operation, to ensure their stability, regular maintenance is required. However, the important component, the electric hoist, is installed on the top. When maintaining and repairing, workers need to work at heights, which is not only time-consuming and laborious but also poses a greater safety hazard. Summary of the Utility Model

[0004] In view of the problems existing in the existing single-girder overhead cranes, the present utility model is proposed.

[0005] Therefore, the purpose of the present utility model is to provide a single-girder overhead crane, which solves the problems that in the existing single-girder overhead crane during use, due to its long-term high-load operation, to ensure its stability, regular maintenance is required. However, the important component, the electric hoist, is installed on the top. When maintaining and repairing, workers need to work at heights, which is not only time-consuming and laborious but also poses a greater safety hazard.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions:

[0007] A single-girder overhead crane includes a bottom plate and columns. The two columns are fixedly arranged on both sides of the upper surface of the bottom plate. The upper ends of the two columns are movably sleeved with sliding sleeves. A slide rail is fixedly arranged between the two sliding sleeves. The middle part of the slide rail is movably sleeved with a slider. An electric hoist is fixedly arranged on the lower side of the slider. A lifting rope is arranged below the electric hoist. The lower end of the lifting rope is fixedly provided with a hook.

[0008] A fixed block is fixedly arranged on the lower side of the sliding sleeve. The rear side of the fixed block is rotatably connected to a support rod through a pin. A strip-shaped opening is formed on the surface of the support rod. A transmission mechanism for driving the two support rods to rotate is arranged on the upper surface of the bottom plate.

[0009] Preferably, the transmission mechanism includes a push rod and a threaded rod. A through hole is formed in the lower side wall of the column. The push rod is slidably sleeved inside the corresponding through hole. A round pin is fixedly arranged on the front side of one end of the push rod close to the support rod. The round pin passes through the corresponding strip-shaped opening. A double-shaft motor is fixedly arranged in the middle of the upper surface of the bottom plate. Screw rods are fixedly arranged at both output ends of the double-shaft motor. Threaded holes are formed at one ends of the two push rods close to each other. The screw rods on both sides are threadedly connected to the corresponding threaded holes.

[0010] Preferably, the thread directions of the two screw rods are opposite.

[0011] Preferably, the cross sections of the column and the sliding sleeve are both rectangular.

[0012] Preferably, the longitudinal sections of the push rod and the through hole are both rectangular.

[0013] Preferably, a retaining ring is fixedly sleeved on the front end of the round pin.

[0014] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0015] In the present utility model, the double-shaft motor drives the two screw rods to rotate, so that the two screw rods with opposite thread directions drive the two push rods to move in opposite directions, that is, the two round pins push the corresponding support rods. Furthermore, the support rods rotate towards the horizontal with the corresponding shaft pins as the axes, and then the sliding sleeves on both sides move downward, that is, the electric hoist can be lowered to a lower position, which is convenient for safe and labor-saving maintenance work on the electric hoist. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 FIG. 1 is a schematic structural diagram of a single-girder bridge crane proposed by the present utility model;

[0018] Figure 2 FIG. 2 is Figure 1 an enlarged schematic structural diagram of a partial A part in FIG. 1;

[0019] Figure 3 FIG. 3 is Figure 1 a three-dimensional view of the column in FIG. 1.

[0020] Description of the reference numerals:

[0021] 1. Bottom plate; 2. Column; 3. Sliding sleeve; 4. Slide rail; 5. Slide block; 6. Electric hoist; 7. Suspension rope; 8. Hook; 9. Fixed block; 10. Axle pin; 11. Biaxial motor; 12. Lead screw; 13. Push rod; 14. Round pin; 15. Support rod. Detailed implementation manner

[0022] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further introduced in detail below in conjunction with the accompanying drawings.

[0023] An embodiment of the present utility model discloses a single-girder bridge crane.

[0024] Referring to Figures 1-3 , a single-girder bridge crane includes a bottom plate 1 and columns 2. Two columns 2 are fixedly arranged on both sides of the upper surface of the bottom plate 1. Sliding sleeves 3 are movably sleeved on the upper ends of the two columns 2. The cross-sections of the columns 2 and the sliding sleeves 3 are both rectangular, so that the sliding sleeves 3 cannot rotate, that is, they can slide stably. A slide rail 4 is fixedly arranged between the two sliding sleeves 3. A slide block 5 is movably sleeved in the middle of the slide rail 4. An electric hoist 6 is fixedly arranged on the lower side of the slide block 5. A suspension rope 7 is arranged below the electric hoist 6. A hook 8 is fixedly arranged at the lower end of the suspension rope 7;

[0025] A fixed block 9 is fixedly arranged on the lower side of the sliding sleeve 3. The rear side of the fixed block 9 is rotatably connected to a support rod 15 through an axle pin 10. A strip-shaped opening is formed on the surface of the support rod 15.

[0026] Referring to Figures 1-3 , a transmission mechanism for driving the two support rods 15 to rotate is arranged on the upper surface of the bottom plate 1. The transmission mechanism includes a push rod 13 and a threaded rod. A through hole is formed in the side wall of the lower end of the column 2. The push rod 13 is slidably sleeved inside the corresponding through hole. A round pin 14 is fixedly arranged on the front side of the end of the push rod 13 close to the support rod 15. The round pin 14 passes through the corresponding strip-shaped opening. A retaining ring is fixedly sleeved on the front end of the round pin 14 to prevent the round pin 14 from slipping out of the strip-shaped opening as much as possible. A biaxial motor 11 is fixedly arranged in the middle of the upper surface of the bottom plate 1. Lead screws 12 are fixedly arranged at both output ends of the biaxial motor 11. Threaded holes are formed at the ends of the two push rods 13 close to each other. The two lead screws 12 are threadedly connected to the corresponding threaded holes. The thread directions of the two lead screws 12 are opposite, so that the two lead screws 12 can drive the two push rods 13 to move in opposite directions. The longitudinal sections of the push rod 13 and the through hole are both rectangular, so that the push rod 13 cannot rotate, that is, it can slide stably.

[0027] In the present utility model, during use, the dual-axis motor 11 drives the two lead screws 12 to rotate, causing the two lead screws 12 with opposite thread directions to drive the two push rods 13 to move in opposite directions, that is, causing the two round pins 14 to push the corresponding support rods 15. As a result, the support rods 15 rotate towards the horizontal with the corresponding pivot pins 10 as the axes, and further cause the sliding sleeves 3 on both sides to move downward, that is, the electric hoist 6 can be lowered to a lower position, thus facilitating safe and labor-saving maintenance work on the electric hoist 6.

[0028] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A single-beam bridge crane, comprising a base plate (1) and a column (2), characterized in that: The two uprights (2) are fixedly arranged on both sides of the upper surface of the bottom plate (1); the upper ends of the two uprights (2) are movably sleeved with a sliding sleeve (3); a sliding rail (4) is fixedly arranged between the two sliding sleeves (3); a sliding block (5) is movably sleeved in the middle of the sliding rail (4); an electric hoist (6) is fixedly arranged on the lower side of the sliding block (5); a lifting rope (7) is arranged below the electric hoist (6); and a lifting hook (8) is fixedly arranged at the lower end of the lifting rope (7); A fixing block (9) is fixedly arranged on the lower side of the sliding sleeve (3); a support rod (15) is rotatably connected to the rear side of the fixing block (9) via an axle pin (10); a strip-shaped opening is provided on the surface of the support rod (15); and a transmission mechanism for driving the two support rods (15) to rotate is provided on the upper surface of the bottom plate (1).

2. The single-beam bridge crane according to claim 1, characterized in that: The transmission mechanism comprises a push rod (13) and a threaded rod. A through hole is formed on the side wall of the lower end of the column (2). The push rod (13) is slidably sleeved inside the corresponding through hole. A round pin (14) is fixedly arranged on the front side of one end of the push rod (13) close to the support rod (15). The round pin (14) passes through the corresponding strip-shaped opening. A dual-axis motor (11) is fixedly arranged in the middle of the upper surface of the base plate (1). Both output ends of the dual-axis motor (11) are fixedly arranged with screw rods (12). The close ends of the two push rods (13) are both provided with threaded holes. The screw rods (12) on both sides are threadedly connected to the corresponding threaded holes.

3. The single-beam bridge crane according to claim 2, characterized in that: The thread directions of the two screw rods (12) are opposite.

4. The single-girder bridge crane according to claim 1, characterized in that: The cross sections of the upright column (2) and the sliding sleeve (3) are both rectangular.

5. The single-girder bridge crane according to claim 2, characterized in that: The push rod (13) and the through hole both have rectangular longitudinal cross-sections.

6. The single-girder bridge crane according to claim 2, characterized in that: A retaining ring is fixedly sleeved on the front end of the round pin (14).

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