CN215626417U - Electric hoist with anti-top-collision limiting protection function - Google Patents

Abstract

The utility model relates to an electric hoist with top-impact limiting protection, which comprises a shell, a speed reducing motor and a winding drum, wherein a steel wire rope is wound on the winding drum, a pulley is arranged at the bottom end of the steel wire rope, a lifting hook is arranged on a pulley cover, a positioning plate is horizontally arranged at the top of the pulley cover, two groups of limiting assemblies are symmetrically arranged at the bottom of the shell, each group of limiting assemblies comprises a U-shaped frame, the U-shaped frame is fixedly connected to the bottom of the shell, an emergency stop switch is arranged in the U-shaped frame, a first sleeve is fixedly connected to the bottom of the U-shaped frame, a limiting column is arranged in the first sleeve, one end of the limiting column extends into the U-shaped frame, the limiting column is in sliding connection with the U-shaped frame, a limiting plate is fixedly connected to one end, away from the U-shaped frame, a positioning column is fixedly connected to one side, away from the limiting column, and a damping spring is sleeved on the part, between the limiting column and the bottom of the U-shaped frame. The utility model solves the problems that the existing electric hoist can not carry out effective anti-top limit protection and is easy to break down.

Description

Electric hoist with anti-top-collision limiting protection function

Technical Field

The utility model belongs to the technical field of electric hoists, and particularly relates to an electric hoist with top-impact limiting protection.

Background

The electric hoist is a special hoisting device and is mainly installed on a crown block and a gantry crane. The electric hoist has the characteristics of small volume, light dead weight, simple operation, convenient use and the like, and is widely applied to industrial and mining enterprises, storage, docks and other places. Electric block provides very big convenience as the essential tool of hoist and mount heavy object, production, transportation etc. for people, because the article that need hoist and mount are all heavier, consequently need carry out multiple protection to electric block, and the scour protection top is spacing carries out an important component part protected to electric block, can prevent effectively that electric block from damaging at the excessive electric block that produces of hoist and mount process stroke. Present electric block can not in time cut off power, can't carry out the spacing protection of effectual scour protection top to electric block, breaks down easily, therefore life is shorter.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an electric hoist with anti-top limit protection, and solves the problems that the existing electric hoist cannot carry out effective anti-top limit protection in the using process and is easy to generate faults, so that the service life is short.

In order to solve the problems, the utility model adopts the technical scheme that:

an electric hoist with top-impact limiting protection comprises a shell, wherein a speed reducing motor is arranged on the shell, a winding drum is arranged in the shell, an output shaft of the speed reducing motor is fixedly connected with the winding drum, a steel wire rope is wound on the winding drum, a pulley is arranged at the bottom end of the steel wire rope, a pulley cover is arranged outside the pulley, a lifting hook is fixedly connected at the bottom end of the pulley cover, a plurality of supporting rods are fixedly connected on the side wall of the pulley cover, the top of each supporting rod is fixedly connected with a horizontally arranged positioning plate, a through hole is formed in the positioning plate, the steel wire rope penetrates through the positioning plate through the through hole, two groups of limiting assemblies are symmetrically arranged at the bottom of the shell, each group of limiting assemblies comprises a U-shaped frame, the U-shaped frame is fixedly connected at the bottom of the shell, an emergency stop switch is arranged in the U-shaped frame, a first sleeve is fixedly connected at the bottom of the U-shaped frame, a limiting column is arranged in the first sleeve, one end of the limiting column extends into the U-shaped frame, spacing post and U type frame sliding connection, the one end fixedly connected with limiting plate of U type frame is kept away from to spacing post, limiting plate and first sleeve sliding connection, one side fixedly connected with reference column of spacing post is kept away from to the limiting plate, the reference column is worn out from the opening part of first sleeve bottom, the diameter of first sleeve bottom opening part is less than the diameter of limiting plate, reference column and first sleeve sliding connection, the part cover that spacing post is located between limiting plate and the U type frame bottom is equipped with damping spring.

Furthermore, two rubber pads are arranged at the top of the positioning plate and correspond to the two positioning columns respectively.

Furthermore, two L-shaped plates are symmetrically arranged on two sides of the shell, the horizontal sections of the L-shaped plates are fixedly connected to the side faces of the shell, and the vertical sections of the L-shaped plates are provided with the opposite-type photoelectric sensors.

Further, the side fixedly connected with light screen of the vertical setting of locating plate, the quantity of light screen is two, and two light screens are located the both sides of locating plate respectively.

Further, be provided with the anticreep subassembly on the lifting hook, the anticreep subassembly is the butt pole, and the one end and the lifting hook of butt pole are articulated.

By adopting the technical scheme, the utility model has the beneficial effects that:

according to the utility model, the limiting assembly is arranged at the bottom of the shell, when a lifting hook lifts a heavy object to ascend, the top of the locating plate is in contact with the locating column, so that the locating plate is driven to slide upwards along the first sleeve, the damping spring is compressed, the damping spring is beneficial to buffering impact, the top of the locating column is in contact with the emergency stop switch, so that a power supply is cut off, the speed reducing motor stops running, the lifting hook is prevented from continuing to ascend to cause collision, the electric hoist is prevented from being damaged, and the electric hoist is protected from top collision limiting; the rubber pad arranged at the top of the positioning plate can play a role in buffering, so that impact generated when the positioning plate is in contact with the positioning column is relieved, and the limiting assembly is protected; through setting up correlation formula photoelectric sensor, under the condition that scram switch became invalid, electric block still can obtain the spacing protection of anti-collision top.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a partially enlarged view of B in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clear, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the utility model provides an electric hoist with anti-bumping and limiting protection, which comprises a casing 1, wherein a speed reducing motor 2 is arranged on the casing 1, a winding drum 3 is arranged in the casing 1, an output shaft of the speed reducing motor 2 is fixedly connected with the winding drum 3, an output shaft of the speed reducing motor 2 is coaxially arranged with the winding drum 3, a steel wire rope 4 is wound on the winding drum 3, a pulley 5 is arranged at the bottom end of the steel wire rope 4, a pulley cover 6 is arranged outside the pulley 5, a lifting hook 7 is fixedly connected at the bottom end of the pulley cover 6, a plurality of support rods 21 are also fixedly connected on the side wall of the pulley cover 6, a positioning plate 8 which is horizontally arranged is fixedly connected at the top of each support rod 21, a through hole is formed in the positioning plate 8, the through hole is not shown in the figure, and the steel wire rope 4 passes through the positioning plate 8 through the through hole. As shown in fig. 1 and fig. 2, two sets of limiting components are symmetrically arranged at the bottom of the casing 1, each set of limiting components comprises a U-shaped frame 9, the U-shaped frame is fixedly connected to the bottom of the casing 1, an emergency stop switch 10 is arranged in the U-shaped frame 9, the emergency stop switch 10 can cut off power supply in time, a first sleeve 11 is fixedly connected to the bottom of the U-shaped frame 9, a limiting post 12 is arranged in the first sleeve 11, one end of the limiting post 12 extends into the U-shaped frame, the limiting post 12 is slidably connected with the U-shaped frame 9, one end of the limiting post 12 away from the U-shaped frame 9 is fixedly connected with a limiting plate 13, the limiting plate 13 is slidably connected with the first sleeve 11, one side of the limiting plate 13 away from the limiting post 12 is fixedly connected with a positioning post 14, the positioning post 14 penetrates out from an opening at the bottom of the first sleeve 11, the diameter of the opening at the bottom of the first sleeve 11 is smaller than that of the limiting plate 13, the positioning post 14 is slidably connected with the first sleeve 11, the part of the limiting column 12, which is positioned between the limiting plate 13 and the bottom of the U-shaped frame 9, is sleeved with a damping spring 15. When lifting hook 7 hoisted the heavy object and risen, 8 tops of locating plate and the contact of reference column 14 to drive limiting plate 13 along 11 upwards slides of first sleeve, damping spring 15 is compressed, damping spring 15 helps slowing down the impact, the top of spacing post 12 touches scram switch 10, thereby the power supply cut-off, 2 stop motion of gear motor prevents that lifting hook 7 from continuing to rise to cause the collision and damage electric block, thereby makes electric block obtain the spacing protection of scour protection top.

Furthermore, two rubber pads 16 are arranged at the top of the positioning plate 8, and the two rubber pads 16 correspond to the two positioning columns 14 respectively. Set up rubber pad 16 and can play the cushioning effect, slow down the impact that produces when locating plate 8 and reference column 14 contact, protect spacing subassembly.

Further, 1 bilateral symmetry of casing is provided with two L shaped plates 17, and L shaped plate 17's horizontal segment fixed connection is in the side of casing 1, all installs correlation formula photoelectric sensor 18 on L shaped plate 17's the vertical section, and correlation formula photoelectric sensor 18 is prior art, and correlation formula photoelectric sensor 18 includes transmitting terminal and receiving terminal, installs the transmitting terminal on one of them L shaped plate 17, installs the receiving terminal on another L shaped plate 17, and correlation formula photoelectric sensor 18 is connected with gear motor 2's controller electricity.

Further, the side fixedly connected with of locating plate 8 is the light screen 19 of vertical setting, and the quantity of light screen 19 is two, and two light screens 19 are located the both sides of locating plate 8 respectively. When the lifting hook 7 lifts a heavy object, when the positioning plate 8 rises to the same height as the correlation type photoelectric sensor 18, the light shielding plate 19 shields the infrared light emitted from the emitting end of the correlation type photoelectric sensor 18, and the receiving end of the correlation type photoelectric sensor 18 cannot receive the light signal, so that the speed reduction motor 2 stops working, the lifting hook 7 does not rise continuously, and the electric hoist is guaranteed to be protected from being effectively prevented from being jacked. Through setting up correlation formula photoelectric sensor 18, under the condition that scram switch 10 became invalid, electric block still can obtain the spacing protection of anti-collision top.

Further, as shown in fig. 3, the hook 7 is provided with an anti-dropping component, the anti-dropping component is an abutting rod 20, and one end of the abutting rod 20 is hinged to the hook 7. The anti-falling assembly is arranged to prevent the heavy object from falling off in the lifting process, so that loss is avoided, workers can be effectively protected, and the heavy object is prevented from falling off and injuring the workers.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, and the utility model is intended to be covered by the appended claims. The scope of the utility model is defined by the appended claims and equivalents.

Claims (5)

1. The utility model provides an electric block of spacing protection of scour protection top which characterized in that: the device comprises a shell, a speed reducing motor is arranged on the shell, a winding drum is arranged in the shell, an output shaft of the speed reducing motor is fixedly connected with the winding drum, a steel wire rope is wound on the winding drum, a pulley is arranged at the bottom end of the steel wire rope, a pulley cover is arranged outside the pulley, a lifting hook is fixedly connected at the bottom end of the pulley cover, a plurality of support rods are fixedly connected to the side wall of the pulley cover, a horizontally arranged positioning plate is fixedly connected at the top of each support rod, a through hole is formed in each positioning plate, the steel wire rope penetrates through the positioning plate through the through hole, two groups of limiting assemblies are symmetrically arranged at the bottom of the shell, each group of limiting assemblies comprises a U-shaped frame, the U-shaped frames are fixedly connected to the bottom of the shell, emergency stop switches are arranged in the U-shaped frames, first sleeves are fixedly connected to the bottoms of the U-shaped frames, limiting columns are arranged in the first sleeves, one ends of the limiting columns extend into the U-shaped frames, and are connected with the U-shaped frames in a sliding manner, the one end fixedly connected with limiting plate of U type frame is kept away from to spacing post, limiting plate and first sleeve sliding connection, one side fixedly connected with reference column of spacing post is kept away from to the limiting plate, and the reference column is worn out from the opening part of first sleeve bottom, and the diameter of first sleeve bottom opening part is less than the diameter of limiting plate, reference column and first sleeve sliding connection, and the part cover that spacing post is located between limiting plate and the U type frame bottom is equipped with damping spring.

2. The electric hoist with anti-ejection limit protection function according to claim 1, characterized in that: two rubber pads are arranged at the top of the positioning plate and correspond to the two positioning columns respectively.

3. The electric hoist with anti-ejection limit protection function according to claim 2, characterized in that: two L-shaped plates are symmetrically arranged on two sides of the shell, the horizontal sections of the L-shaped plates are fixedly connected to the side faces of the shell, and the vertical sections of the L-shaped plates are provided with opposite photoelectric sensors.

4. The electric hoist with anti-ejection limit protection function according to claim 3, characterized in that: the side fixedly connected with of locating plate is the light screen of vertical setting, and the quantity of light screen is two, and two light screens are located the both sides of locating plate respectively.

5. The electric hoist with anti-ejection limit protection function according to claim 1, characterized in that: be provided with the anticreep subassembly on the lifting hook, the anticreep subassembly is the butt pole, and the one end and the lifting hook of butt pole are articulated.

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