Top rushing prevention type single-beam crane

Abstract

The utility model discloses an anti-top-rushing type single-beam crane, which relates to the technical field of cranes and comprises a steel channel beam, the side wall of the steel channel beam is fixedly connected with a lower fixing piece and an upper fixing piece, the surface of the lower fixing piece is fixedly connected with a shaft seat, the surface of the shaft seat is rotatably connected with a rotating shaft, and the top end of the rotating shaft is rotatably connected with the upper fixing piece. Sliding rails are fixedly connected to the side walls of the rotating shafts, sliding assemblies are slidably connected to the inner side walls of the sliding rails, electric hoists are fixedly connected to the lower surfaces of the sliding assemblies, and lifting hooks are arranged on falling cables of the electric hoists; vibration amplitude of the structure can be effectively reduced through the damping spring, influence of impact on the electric hoist is reduced, the electric hoist is protected from being damaged, meanwhile, the electric hoist is powered off through the forced power-off switch, a lifting hook is prevented from continuously impacting, the lifting hook can be effectively prevented from impacting, and service life is prolonged. The position of the electric hoist can be flexibly adjusted, so that the hoisting range of the crane is enlarged, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to an anti-overhead-striking single-girder crane. Background Technique

[0002] A crane refers to a multi-action lifting machine that vertically lifts and horizontally transports heavy objects within a certain range. There are many types of cranes, such as gantry cranes, bridge cranes, tower cranes, etc. They are widely used, saving a large amount of manpower and material resources and improving work efficiency. When a gantry crane includes a main girder, it is a single-girder crane. Usually, a trolley track is fixed at the bottom of the main girder, and an electric hoist is suspended on the trolley track. The electric hoist is used to lift goods and can run left and right along the trolley track. The single-girder crane belongs to a deformation of the bridge crane and is mainly used in outdoor freight yards, ports, large factories and other places for loading and unloading. The single-girder gantry crane has the characteristics of high site utilization rate, large operation range, wide adaptability, strong versatility, etc., but the existing single-girder crane has certain defects.

[0003] After retrieval, it is found that the Chinese patent with the publication number of CN220502497U discloses a single-girder bridge crane, which includes two support columns and a cross beam rod arranged on the tops of the two support columns; a sliding seat is slidably connected to the cross beam rod, and a driving mechanism is arranged on the support column; an electric hoist is arranged at the bottom of the sliding seat, the electric hoist has a hoisting steel cable, a buffer mechanism is installed at the bottom of the hoisting steel cable, and a hanging mechanism is fixedly installed at the bottom of the buffer mechanism; two support frames are symmetrically arranged at the bottom of the sliding seat, and a cleaning assembly is arranged on the support frame. The cleaning assembly includes a second motor and a cleaning brush; a second motor is fixedly installed at the lower end of the support frame, a cleaning brush is installed on the output shaft of the second motor, and the bristles of the cleaning brush are in contact with the outer surface of the hoisting steel cable; by rotating the cleaning brush, the dust attached to the outer surface of the hoisting steel cable is cleaned and swept off, achieving a good cleaning effect, avoiding excessive dust accumulation inside the electric hoist, the electric hoist is not prone to failure, and the service life of the electric hoist is improved.

[0004] The above-mentioned utility model has the following problems:

[0005] 1. During actual use, due to improper operation or equipment failure, an overhead-striking phenomenon may occur, that is, the hook assembly is out of control and directly hits the bottom of the electric hoist, causing serious impact damage to the electric hoist, with a long maintenance cost and maintenance time, affecting the normal work of the workshop.

[0006] Therefore, those skilled in the art provide an anti-overhead-striking single-girder crane to solve the problems raised in the above background technique. Content of the Utility Model

[0007] The purpose of the utility model is to provide an anti-overhead-striking single-girder crane to solve the problems raised in the above background technique.

[0008] To achieve the above object, the present utility model provides the following technical solutions:

[0009] An anti-overhead single-girder crane, comprising a channel steel beam, wherein a lower fixing member and an upper fixing member are fixedly connected to the side wall of the channel steel beam. A shaft seat is fixedly connected to the surface of the lower fixing member, a rotating shaft is rotatably connected to the surface of the shaft seat, and the top end of the rotating shaft is rotatably connected to the upper fixing member. A slide rail is fixedly connected to the side wall of the rotating shaft, a sliding component is slidably connected to the inner side wall of the slide rail, an electric hoist is fixedly connected to the lower surface of the sliding component, and a hook is arranged on the cable of the electric hoist.

[0010] As a further scheme of the present utility model: a housing is fixedly connected to the lower surface of the electric hoist, a limiting groove is formed in the inner side wall of the housing, a limiting block is slidably connected to the inner side wall of the limiting groove, a first wedge-shaped block is fixedly connected to the side wall of the limiting block, and an abutting rod is fixedly connected to the bottom end of the first wedge-shaped block.

[0011] As a further scheme of the present utility model: a forced power-off switch electrically connected to the electric hoist is fixedly connected to the top wall of the inner cavity of the housing, and the first wedge-shaped block abuts against the forced power-off switch when moving.

[0012] As a further scheme of the present utility model: a damping spring is fixedly connected to the inner side wall of the housing, a second wedge-shaped block is fixedly connected to the movable end of the damping spring, and the second wedge-shaped block abuts against the first wedge-shaped block.

[0013] As a further scheme of the present utility model: a side fixing member is fixedly connected to the side wall of the rotating shaft, and a reinforcing rib is fixedly connected between the side fixing member and the upper surface of the slide rail.

[0014] As a further scheme of the present utility model: a worm gear is fixedly connected to the top end of the rotating shaft.

[0015] As a further scheme of the present utility model: a worm is rotatably connected to the inner side wall of the side fixing member, and the worm gear is meshed with the worm.

[0016] As a further scheme of the present utility model: a driving motor is fixedly connected to the top end of the side fixing member, and the power output end of the driving motor is fixedly connected to one end of the worm.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] 1. When the top is reached, the movement of the lifting hook will hit the abutting rod. The movement of the abutting rod drives the movement of the first wedge block. The movement of the first wedge block drives the movement of the second wedge block. The movement of the second wedge block compresses the damping spring, causing the internal spring of the damping spring to undergo elastic deformation, absorbing part of the energy and generating a reaction force. At the same time, the internal damper dissipates energy through friction and fluid resistance, reducing the energy of the vibration system. Combining elastic deformation and energy dissipation, the damping spring can effectively reduce the vibration amplitude of the structure, reduce the impact on the electric hoist, protect the electric hoist from damage. At the same time, when the first wedge block moves, it will press the forced power-off switch, and the electric hoist is powered off through the forced power-off switch to prevent the lifting hook from continuing to reach the top, which can effectively prevent the lifting hook from reaching the top and improve the service life. When the driving motor operates, the power output end of the driving motor rotates to drive the worm to rotate. The rotation of the worm drives the worm gear to rotate. The rotation of the worm gear drives the rotating shaft to rotate. The rotation of the rotating shaft drives the slide rail to rotate. The rotation of the slide rail drives the electric hoist thereon to rotate, which can flexibly adjust the position of the electric hoist, thereby increasing the lifting range of the crane and facilitating use. At the same time, due to the characteristics of worm transmission, the contact area between the worm and the worm gear is large, and the helix angle of the worm is usually less than the friction angle. When a load is applied to the worm gear, due to the existence of friction, it is very difficult for the worm to be pushed to rotate back by the worm gear when not driven. In this case, the entire transmission mechanism has a self-locking characteristic, ensuring that when the drive stops, the slide rail can stably maintain its current position and will not move or reverse inadvertently, guaranteeing the stability of the movement of the electric hoist on the slide rail. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of an anti-overhead single-girder crane.

[0020] Figure 2 It is an anti-overhead single-girder crane Figure 1 Enlarged view at position A in the crane.

[0021] Figure 3 It is a schematic plan view of the meshing part of the worm and worm gear of an anti-overhead single-girder crane.

[0022] Figure 4 It is a schematic diagram of the internal structure of the housing in an anti-overhead single-girder crane.

[0023] In the figure: 1, channel steel beam; 2, lower fixing piece; 3, shaft seat; 4, rotating shaft; 5, upper fixing piece; 6, worm gear; 7, side fixing piece; 8, driving motor; 9, worm; 10, slide rail; 11, reinforcing rib; 12, sliding assembly; 13, electric hoist; 14, lifting hook; 15, housing; 16, limit groove; 17, limit block; 18, first wedge block; 19, abutting rod; 20, damping spring; 21, second wedge block; 22, forced power-off switch. Detailed Implementation Modes

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1

[0026] Referring to Figures 1-4 , this embodiment provides an anti-overhead single-girder crane, which includes a channel steel beam 1. A lower fixing member 2 and an upper fixing member 5 are fixedly connected to the side wall of the channel steel beam 1. A shaft seat 3 is fixedly connected to the surface of the lower fixing member 2. A rotating shaft 4 is rotatably connected to the surface of the shaft seat 3, and the top end of the rotating shaft 4 is rotatably connected to the upper fixing member 5. A slide rail 10 is fixedly connected to the side wall of the rotating shaft 4. A sliding component 12 is slidably connected to the inner side wall of the slide rail 10. An electric hoist 13 is fixedly connected to the lower surface of the sliding component 12. A hook 14 is arranged on the lifting cable of the electric hoist 13. A housing 15 is fixedly connected to the lower surface of the electric hoist 13. A limiting groove 16 is formed on the inner side wall of the housing 15. A limiting block 17 is slidably connected to the inner side wall of the limiting groove 16. A first wedge block 18 is fixedly connected to the side wall of the limiting block 17. An abutting rod 19 is fixedly connected to the bottom end of the first wedge block 18. A forced power-off switch 22 electrically connected to the electric hoist 13 is fixedly connected to the top wall of the inner cavity of the housing 15, and the first wedge block 18 abuts against the forced power-off switch 22 when moving. A damping spring 20 is fixedly connected to the inner side wall of the housing 15. A second wedge block 21 is fixedly connected to the movable end of the damping spring 20, and the second wedge block 21 abuts against the first wedge block 18; when an overhead collision occurs, the movement of the hook 14 will hit the abutting rod 19. The movement of the abutting rod 19 drives the movement of the first wedge block 18. The movement of the first wedge block 18 drives the movement of the second wedge block 21. The movement of the second wedge block 21 compresses the damping spring 20, causing the internal spring of the damping spring 20 to undergo elastic deformation, absorbing part of the energy and generating a reaction force. At the same time, the internal damper dissipates energy through friction and fluid resistance, reducing the energy of the vibration system. Combining elastic deformation and energy dissipation, the damping spring 20 can effectively reduce the vibration amplitude of the structure, reduce the impact on the electric hoist 13, protect the electric hoist 13 from damage. At the same time, when the first wedge block 18 moves, it will press the forced power-off switch 22, and the electric hoist 13 is powered off through the forced power-off switch 22, avoiding the hook 14 from continuing to move overhead, effectively preventing the hook 14 from moving overhead and improving the service life.

[0027] Embodiment 2

[0028] Referring to Figures 1-3, this embodiment is based on the previous embodiment. The difference from the previous embodiment is that a side fixing member 7 is fixedly connected to the side wall of the rotating shaft 4. A reinforcing rib 11 is fixedly connected between the side fixing member 7 and the upper surface of the slide rail 10. A worm gear 6 is fixedly connected to the top end of the rotating shaft 4. A worm 9 is rotatably connected to the inner side wall of the side fixing member 7, and the worm gear 6 is meshed with the worm 9. A driving motor 8 is fixedly connected to the top end of the side fixing member 7. The power output end of the driving motor 8 is fixedly connected to one end of the worm 9. When the driving motor 8 operates, the power output end of the driving motor 8 rotates to drive the worm 9 to rotate. The worm 9 rotates to drive the worm gear 6 to rotate. The worm gear 6 rotates to drive the rotating shaft 4 to rotate. The rotating shaft 4 rotates to drive the slide rail 10 to rotate. The slide rail 10 rotates to drive the electric hoist 13 thereon to rotate, which can flexibly adjust the position of the electric hoist 13, thereby increasing the lifting range of the crane and facilitating use. At the same time, due to the characteristics of the worm 9 transmission, the contact area between the worm 9 and the worm gear 6 is relatively large, and the spiral angle of the worm 9 is usually smaller than the friction angle. When a load is applied to the worm gear 6, due to the existence of friction, it is very difficult for the worm 9 to be pushed back by the worm gear 6 without being driven. In this case, the entire transmission mechanism has a self-locking characteristic, ensuring that when the drive is stopped, the slide rail 10 can stably maintain its current position and will not move or reverse inadvertently, guaranteeing the stability of the movement of the electric hoist 13 on the slide rail 10.

[0029] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0030] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-top impact single-beam crane, characterized in that: The invention comprises a channel steel beam (1), wherein the side wall of the channel steel beam (1) is fixedly connected with a lower fixing member (2) and an upper fixing member (5), the surface of the lower fixing member (2) is fixedly connected with an axle seat (3), the surface of the axle seat (3) is rotatably connected with a rotating shaft (4), and the top end of the rotating shaft (4) is rotatably connected with the upper fixing member (5), the side wall of the rotating shaft (4) is fixedly connected with a slide rail (10), the inner side wall of the slide rail (10) is slidably connected with a sliding assembly (12), the lower surface of the sliding assembly (12) is fixedly connected with an electric hoist (13), and a hook (14) is arranged on the cable of the electric hoist (13).

2. The anti-top impact type single beam crane according to claim 1, characterized in that: The lower surface of the electric hoist (13) is fixedly connected to a housing (15); a limiting groove (16) is provided on the inner side wall of the housing (15); a limiting block (17) is slidably connected to the inner side wall of the limiting groove (16); a first wedge block (18) is fixedly connected to the side wall of the limiting block (17); and a contact rod (19) is fixedly connected to the bottom end of the first wedge block (18).

3. The anti-top impact type single beam crane according to claim 2, characterized in that: A forced power-off switch (22) electrically connected to the electric hoist (13) is fixedly connected to the top wall of the inner cavity of the housing (15), and the first wedge block (18) abuts against the forced power-off switch (22) when moving.

4. The anti-top impact type single beam crane according to claim 2, characterized in that: The inner wall of the housing (15) is fixedly connected with a damping spring (20), the movable end of the damping spring (20) is fixedly connected with a second wedge block (21), and the second wedge block (21) is in abutment with the first wedge block (18).

5. The anti-top impact type single beam crane according to claim 1, characterized in that: The side wall of the rotating shaft (4) is fixedly connected with a side fixing piece (7), and a reinforcing rib (11) is fixedly connected between the side fixing piece (7) and the upper surface of the slide rail (10).

6. The anti-top impact type single beam crane according to claim 1, characterized in that: A worm gear (6) is fixedly connected to the top end of the rotating shaft (4).

7. The anti-top impact type single beam crane according to claim 5, characterized in that: The inner side wall of the side fixing member (7) is rotatably connected to a worm (9), and the worm wheel (6) is meshingly connected to the worm (9).

8. The anti-top impact type single beam crane according to claim 5, characterized in that: The top end of the side fixing member (7) is fixedly connected to a driving motor (8), and the power output end of the driving motor (8) is fixedly connected to one end of the worm (9).

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