Explosion-proof electric hoist of electric double-beam crane

Abstract

An explosion-proof electric hoist of an electric double-beam crane comprises an explosion-proof electric hoist body, the explosion-proof electric hoist body comprises a shell and a lifting hook assembly, an upper protection assembly is arranged at the bottom of the shell, and a lower protection assembly is arranged at the top of the lifting hook assembly; the upper protection assembly comprises two L-shaped fixing plates, the tops of the fixing plates are fixed to the bottom of the shell, and an upper protection plate is detachably fixed between the two fixing plates; the lower protection assembly comprises a lower protection plate arranged above the lifting hook assembly, symmetrical mounting assemblies are arranged on the two sides of the lower protection plate, each mounting assembly comprises a mounting plate fixed to the outer side of the lifting hook assembly, a connecting plate is arranged above the mounting plate, and a plurality of first springs are detachably fixed between the mounting plate and the connecting plate; a connecting rod is detachably fixed to the top of the connecting plate, and the upper portion of the connecting rod is detachably and fixedly connected with the side face of the lower protection plate through a connecting bolt. The explosion-proof type electric hoist can protect the explosion-proof type electric hoist body and the lifting hook assembly, and damage is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of electric hoists, specifically to an explosion-proof electric hoist for an electric double-girder crane. Background Technology

[0002] An electric double-girder crane consists of two main girder sections with a trolley between them. A trolley track is fixed to the top of the main girder to facilitate the trolley's left and right movement. An electric hoist is detachably mounted on the trolley. In locations with explosion-proof requirements, explosion-proof electric hoists are commonly used. These hoists employ special explosion-proof measures, such as using explosion-proof motors and electrical components, to ensure that explosions will not occur due to electrical sparks during operation, thus guaranteeing operational safety. However, during use, if improper operation or equipment malfunction causes an overshoot phenomenon (i.e., the hook assembly rapidly impacts the top), the crane may fail to maintain its position. When the top of an electric hoist is impacted, it can easily cause serious damage to the hoist's components, resulting in high repair costs. It can also easily generate sparks from the impact, posing a significant safety hazard. Therefore, it is necessary to install an anti-impact device on the electric hoist. Currently, anti-impact devices are generally installed at the bottom of the electric hoist casing to protect the hoist's drum and other components. For example, the patent publication number CN211920742U, entitled "Anti-impact Buffer Device for Electric Hoist," discloses a technical solution. However, when an impact occurs, it can easily lead to serious damage to the electric hoist's hook assembly. Utility Model Content

[0003] The purpose of this utility model is to provide an explosion-proof electric hoist for an electric double-girder crane, which can protect the main body and hook assembly of the explosion-proof electric hoist and reduce collision damage when an overshoot occurs.

[0004] The technical solution adopted by this utility model is as follows:

[0005] An explosion-proof electric hoist for an electric double-girder crane includes an explosion-proof electric hoist body. The explosion-proof electric hoist body includes a shell, a drum rotatably connected inside the shell, an explosion-proof motor drivingly connected to one end of the drum, a hook assembly below the drum, a wire rope wound on the drum, one end of the wire rope detachably fixed to the drum, and the other end of the wire rope passing over the hook assembly and detachably fixed to the shell. An upper protective assembly is provided at the bottom of the shell, and a lower protective assembly is provided at the top of the hook assembly. The upper protective assembly includes two L-shaped fixing plates, the top of which is fixed to the bottom of the shell, and the upper protective plate is detachably fixed between the two fixing plates. The lower protective assembly includes a lower protective plate positioned above the hook assembly, and symmetrical mounting assemblies on both sides of the lower protective plate. The mounting assemblies include mounting plates fixed to the outside of the hook assembly, a connecting plate above the mounting plates, and several first springs detachably fixed between the mounting plates and the connecting plates. A connecting rod is detachably fixed to the top of the connecting plate, and the upper part of the connecting rod is detachably fixed to the side of the lower protective plate by connecting bolts.

[0006] The bottom of the lower protective plate is provided with an arc-shaped groove, and an arc-shaped pad can be detachably fixed in the arc-shaped groove. The top of the arc-shaped pad fits into the bottom of the arc-shaped groove.

[0007] Several second springs are detachably fixed to the top of the lower protective plate.

[0008] The mounting plate has detachable side plates at both ends, with vertical holes on the side plates; the connecting plate has slides at both ends, with threaded posts fixed to the inner ends of the slides, and threaded holes that mate with the threaded posts on the connecting plate, with the outer ends of the slides slidably connected in the vertical holes.

[0009] The first spring and the second spring are both fixed with assembly blocks at their top and bottom. The assembly block at the bottom of the second spring is detachably fixed to the top of the lower protective plate by screws. The assembly block at the top of the first spring is detachably fixed to the connecting plate by screws. The assembly block at the bottom of the first spring is detachably fixed to the mounting plate by screws.

[0010] The top of the connecting plate is provided with at least two connecting rods, the bottom of the connecting rods is fixed with a fixing block, the top of the connecting plate is provided with a fixing groove, and the fixing block can be detachably fixed in the fixing groove.

[0011] The bottom of the upper protective plate is detachably secured with a protective pad.

[0012] The hook assembly includes two spaced-apart mounting plates, with pulleys and a hook rotatably connected between the two mounting plates from top to bottom. The pulleys are engaged with wire ropes, and the top of the pulleys is higher than the top of the mounting plates.

[0013] In this invention, the bottom of the housing is provided with an upper protective component to protect the main body of the explosion-proof electric hoist, and the top of the hook assembly is provided with a lower protective component to protect the hook assembly and reduce collision damage. The upper protective component includes two L-shaped fixing plates, the top of which is fixed to the bottom of the housing. The upper protective plate is detachably fixed between the two fixing plates, which can protect the drum and housing of the explosion-proof electric hoist and facilitate installation and disassembly. The lower protective component includes a lower protective plate set above the hook assembly to protect the hook assembly. Symmetrical mounting components are provided on both sides of the lower protective plate. The mounting components include mounting plates fixed to the outside of the hook assembly. A connecting plate is provided above the mounting plate. Several first springs are detachably fixed between the mounting plate and the connecting plate to provide buffer protection. A connecting rod is detachably fixed to the top of the connecting plate. The upper part of the connecting rod is detachably fixed to the side of the lower protective plate by connecting bolts, which facilitates installation and disassembly. Attached Figure Description

[0014] Figure 1 This is an installation diagram of the present invention;

[0015] Figure 2 A schematic diagram of the hook assembly and the lower protection assembly (I);

[0016] Figure 3 Schematic diagram of the hook assembly and lower protection assembly (II);

[0017] Figure 4 This is a partial structural diagram of the lower protection component;

[0018] Figure 5 This is a schematic diagram of the side plate and the slider.

[0019] In the diagram: 1-Hook assembly, 2-Lower protection assembly, 3-Trolley, 4-Upper protection assembly, 5-Explosion-proof motor, 6-Housing, 7-Explosion-proof electric hoist body, 8-Fixing plate, 9-Vertical plate, 10-Horizontal plate, 11-Protective pad, 12-Upper protection plate, 13-Wire rope, 14-Second spring, 15-Lower protection plate, 16-Connecting rod, 17-Connecting bolt, 18-Arc-shaped pad, 19-Pulley, 20-Mounting assembly, 21-Hook, 22-Assembly block, 23-First spring, 24-Side plate, 25-Vertical hole, 26-Connecting plate, 27-Sliding bar, 28-Assembly plate, 29-Fixing block, 30-Threaded column, 31-Mounting plate. Detailed Implementation

[0020] like Figures 1-5As shown, an explosion-proof electric hoist for an electric double-girder crane includes an explosion-proof electric hoist body 7. The explosion-proof electric hoist body 7 includes a housing 6, within which a drum is rotatably connected. One end of the drum is drivenly connected to an explosion-proof motor 5. A hook assembly 1 is located below the drum. A wire rope 13 is wound on the drum. One end of the wire rope 13 is detachably fixed to the drum, and the other end of the wire rope 13 passes around the hook assembly 1 and is detachably fixed to the housing 6. An upper protective assembly 4 is located at the bottom of the housing 6 to protect the explosion-proof electric hoist body 7. A lower protective assembly 2 is located at the top of the hook assembly 1 to protect the hook assembly 1 and reduce collision damage. The upper protective assembly 4 includes two L-shaped fixing plates 8. The top of the fixing plates 8 is fixed to the bottom of the housing 6, and an upper protective plate 12 is detachably fixed between the two fixing plates 8. This provides protection for the drum, housing 6, etc., of the explosion-proof electric hoist body 7, and also facilitates installation and disassembly. The wire ropes 13 extending to the outside of the housing 6 are located on the front and rear sides of the upper protective plate 12, facilitating their operation. When the upper protective plate 12 is wide, slotted holes can be provided on it, through which the wire ropes 13 pass, facilitating their operation. The lower protective assembly 2 includes a lower protective plate 15 positioned above the hook assembly 1 and below the upper protective plate 12, protecting the hook assembly 1. Symmetrical mounting assemblies 20 are provided on both sides of the lower protective plate 15. Each mounting assembly 20 includes a mounting plate 31 fixed to the outside of the hook assembly 1. A connecting plate 26 is provided above the mounting plate 31. Several first springs 23 are detachably fixed between the mounting plate 31 and the connecting plate 26, providing buffer protection. A connecting rod 16 is detachably fixed to the top of the connecting plate 26. The upper part of the connecting rod 16 is detachably fixed to the side of the lower protective plate 15 via connecting bolts 17, facilitating installation and disassembly.

[0021] The bottom of the lower protective plate 15 is provided with an arc-shaped groove, and an arc-shaped pad 18 is detachably fixed in the arc-shaped groove. The top of the arc-shaped pad 18 fits the bottom of the arc-shaped groove. The arc-shaped pad 18 is adapted to the shape of the pulley 19. The arc-shaped pad 18 can be made of rubber pad, silicone pad, etc., to facilitate the protection of the pulley 19.

[0022] Several second springs 14 are detachably fixed to the top of the lower protective plate 15, which serve as a buffer and protection function.

[0023] The fixing plate 8 of the upper protective component 4 includes a vertical plate 9 and a horizontal plate 10. The horizontal plate 10 is fixed at the bottom position outside the vertical plate 9. The upper protective plate 12 is detachably fixed between the two vertical plates 9. The horizontal plate 10 is used to detachably fix the top of the trolley 3.

[0024] The mounting plate 31 has side plates 24 that are detachably fixed at both ends, and the side plates 24 have vertical holes 25. The connecting plate 26 has slide bars 27 at both ends, and the inner end of the slide bar 27 is fixed with a threaded post 30. The connecting plate 26 has a threaded hole that mates with the threaded post 30. The threaded post 30 at the inner end of the slide bar 27 is threaded into the corresponding threaded hole, which facilitates installation and disassembly. The outer end of the slide bar 27 is slidably connected into the vertical hole 25. When the connecting plate 26 presses down on the first spring 23, the slide bar 27 slides along the corresponding vertical hole 25.

[0025] The first spring 23 and the second spring 14 are both fixed with assembly blocks 22 at their top and bottom. The assembly block 22 at the bottom of the second spring 14 is detachably fixed to the top of the lower protective plate 15 by screws. The assembly block 22 at the top of the first spring 23 is detachably fixed to the connecting plate 26 by screws. The assembly block 22 at the bottom of the first spring 23 is detachably fixed to the mounting plate 31 by screws, which facilitates installation and disassembly.

[0026] The top of the connecting plate 26 is provided with at least two connecting rods 16, and the bottom of the connecting rods 16 is fixed with a fixing block 29. The top of the connecting plate 26 is provided with a fixing groove, and the fixing block 29 can be detachably fixed in the fixing groove, so as to facilitate the quick installation of the connecting rods 16 into place.

[0027] The bottom of the upper protective plate 12 is detachably fixed with a protective pad 11, which can be made of rubber pad, silicone pad, etc., and has a protective function.

[0028] The hook assembly 1 includes two spaced mounting plates 28. A pulley 19 and a hook 21 are rotatably connected between the two mounting plates 28 from top to bottom. The hook 21 is used to hook goods. The pulley 19 cooperates with the wire rope 13. The top of the pulley 19 is higher than the top of the mounting plate 28.

[0029] The mounting component 20 is disposed on the outside of the mounting plate 28, and the mounting plate 31 is fixed on the outside of the mounting plate 28.

[0030] During installation, the explosion-proof electric hoist body 7 is placed on top of the trolley 3 of the electric double-girder crane. The fixing plate 8 at the bottom of the housing 6 is detachably fixed to the top of the trolley 3 with screws or bolts. The trolley 3 is provided with a through hole corresponding to the drum. During use, when an overshoot occurs due to improper operation or equipment failure, the hook assembly 1 quickly rises into the through hole. After the second spring 14 of the lower protection assembly 2 contacts the protective pad 11 of the upper protection assembly 4, the second spring 14 is compressed. The second spring 14 presses down on the lower protection plate 15 and, through the connecting rod 16 and the connecting plate 26, presses the first spring 23 for buffer protection, thereby protecting the explosion-proof electric hoist body 7 and the hook assembly 1 and reducing collision damage.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. An explosion-proof electric hoist for an electric double-girder crane, comprising an explosion-proof electric hoist body, the explosion-proof electric hoist body including a shell, a drum rotatably connected inside the shell, an explosion-proof motor being drivenly connected to one end of the drum, a hook assembly being provided below the drum, a wire rope being wound on the drum, one end of the wire rope being detachably fixed to the drum, and the other end of the wire rope passing over the hook assembly and being detachably fixed to the shell, characterized in that: The bottom of the housing is provided with an upper protective assembly, and the top of the hook assembly is provided with a lower protective assembly. The upper protective assembly includes two L-shaped fixing plates, the top of which is fixed to the bottom of the housing, and the upper protective plate is detachably fixed between the two fixing plates. The lower protective assembly includes a lower protective plate set above the hook assembly, and symmetrical mounting assemblies are provided on both sides of the lower protective plate. The mounting assembly includes a mounting plate fixed to the outside of the hook assembly, and a connecting plate is provided above the mounting plate. Several first springs are detachably fixed between the mounting plate and the connecting plate. A connecting rod is detachably fixed to the top of the connecting plate, and the upper part of the connecting rod is detachably fixed to the side of the lower protective plate by connecting bolts. The bottom of the lower protective plate is provided with an arc-shaped groove, and an arc-shaped pad is detachably fixed in the arc-shaped groove. The top of the arc-shaped pad fits into the bottom of the arc-shaped groove. Several second springs are detachably fixed to the top of the lower protective plate.

2. The explosion-proof electric hoist of the electric double-girder crane as described in claim 1, characterized in that: The mounting plate has detachable side plates at both ends, with vertical holes on the side plates; the connecting plate has slides at both ends, with threaded posts fixed to the inner ends of the slides, and threaded holes that mate with the threaded posts on the connecting plate, with the outer ends of the slides slidably connected in the vertical holes.

3. The explosion-proof electric hoist of the electric double-girder crane as described in claim 1, characterized in that: The first spring and the second spring are both fixed with assembly blocks at their top and bottom. The assembly block at the bottom of the second spring is detachably fixed to the top of the lower protective plate by screws. The assembly block at the top of the first spring is detachably fixed to the connecting plate by screws. The assembly block at the bottom of the first spring is detachably fixed to the mounting plate by screws.

4. The explosion-proof electric hoist of the electric double-girder crane as described in claim 1, characterized in that: The top of the connecting plate is provided with at least two connecting rods, the bottom of the connecting rods is fixed with a fixing block, the top of the connecting plate is provided with a fixing groove, and the fixing block can be detachably fixed in the fixing groove.

5. The explosion-proof electric hoist of the electric double-girder crane as described in claim 1, characterized in that: The bottom of the upper protective plate is detachably secured with a protective pad.

6. The explosion-proof electric hoist of the electric double-girder crane as described in claim 1, characterized in that: The hook assembly includes two spaced-apart mounting plates, with pulleys and a hook rotatably connected between the two mounting plates from top to bottom. The pulleys are engaged with wire ropes, and the top of the pulleys is higher than the top of the mounting plates.

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