CN219603068U - Portal crane with overload protection structure - Google Patents

Abstract

The utility model provides a portal crane with an overload protection structure, which is simple in design structure, provides elasticity for an elastic plate through a spring, enables a connecting rod to be connected with a connecting groove and drive a winding shaft to rotate, and if goods are too heavy and still can not be pulled up, the connecting rod can still leave the connecting groove after being extruded, so that a protection effect on a worm motor can be achieved, the worm motor is prevented from being in a locking working state.

Description

Portal crane with overload protection structure

Technical Field

The utility model relates to the technical field of portal cranes, in particular to a portal crane with an overload protection structure.

Background

Gantry cranes are a variant of bridge cranes, also called gantry cranes. The device is mainly used for loading and unloading operations of outdoor goods yards, stock yards and bulk cargoes. The portal crane has the characteristics of high field utilization rate, wide operation range, wide application range, strong universality and the like, and can be used in industry, wherein the crane refers to a multi-action hoisting machine for vertically hoisting and horizontally carrying heavy objects in a certain range, namely a crown block, an aerial crane and a crane, and the portal crane is the most frequently used in the crane.

The existing portal crane is often used for solving the problem that the damage probability of working equipment is increased due to insufficient overload protection.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model solves the technical problems as follows: the problem that the damage probability of working equipment is increased due to insufficient overload protection when the existing portal crane is used is solved, and the portal crane with the overload protection structure is provided.

To achieve the above object, the present utility model provides:

the utility model provides a gantry crane with overload protection structure, includes two bottom plates, two the bottom of bottom plate all is provided with the universal wheel, all is provided with the brake block on two universal wheels, the universal wheel of setting can be convenient to the global motion, the top of two bottom plates all is provided with vertical pole, same horizontal roof is installed at the top of two vertical poles, the bottom of horizontal roof is provided with the rectangle box, be provided with winding mechanism in the rectangle box, be provided with elastic mechanism on the top inner wall of rectangle box, be connected with the elastic plate on the elastic mechanism, install the worm motor on the elastic plate, install the plectane on the output shaft of worm motor, a plurality of connecting rods are installed to the bottom of plectane, be provided with coupling mechanism in the rectangle box, the connecting rod links to each other with coupling mechanism, coupling mechanism links to each other with winding mechanism.

Preferably, the elastic mechanism comprises two push rod motors, the two push rod motors are all arranged on the inner wall of the top of the rectangular box, I-shaped rods are all arranged on the output shafts of the two push rod motors, the elastic plate is slidably arranged on the outer sides of the two I-shaped rods, a spring is sleeved on the outer sides of the I-shaped rods, the top ends of the springs are connected with the I-shaped rods, and the bottom ends of the springs are connected with the top ends of the elastic plate; the two push rod motors are utilized to push the I-shaped rod to move downwards, so that the spring is in a compressed state and has the elasticity equal to that of the elastic plate, and the stability of connection between the connecting rod and the connecting groove is improved by the shaft.

Preferably, the connecting mechanism comprises a fixed rod, the fixed rod is fixedly arranged in the rectangular box, a rotary rod is rotatably arranged on the fixed rod, a connecting circular plate is arranged at the top end of the rotary rod, a plurality of connecting grooves are formed in the top of the connecting circular plate, and the bottom end of the connecting rod is arc-shaped and is matched with the corresponding connecting grooves; the circular plate drives the connecting circular plate to rotate through the cooperation of the connecting rods and the connecting grooves, and the connecting circular plate drives the rotating rod to rotate.

Preferably, the winding mechanism comprises a winding shaft, the winding shaft is rotatably arranged in a rectangular box, two winding wheels are sleeved on the outer sides of the winding shaft, steel wire ropes are sleeved on the outer sides of the two winding wheels, hooks are arranged at the bottom ends of the two steel wire ropes, two through holes are formed in the bottom of the rectangular box, and the steel wire ropes are movably connected with the corresponding through holes; the winding shaft drives the two winding wheels to rotate, and the two winding wheels loosen and wind the two steel wire ropes.

Preferably, a first bevel gear is arranged at the bottom end of the rotary rod, a second bevel gear is sleeved on the outer side of the winding shaft, and the first bevel gear is meshed with the second bevel gear.

Compared with the prior art, the utility model has the advantages that:

1. the device has the advantages that the device can conveniently move integrally through four universal wheels, a worm motor is reversely started to drive a circular plate to rotate, the circular plate drives the connecting circular plate to rotate through the cooperation of a plurality of connecting rods and a plurality of connecting grooves, the connecting circular plate drives a rotating rod to rotate, the rotating rod drives a rolling shaft and two rolling wheels to rotate through a first bevel gear and a second bevel gear, the two rolling wheels loosen two steel wire ropes, the two steel wire ropes drive the two hooks to move downwards and approach an object to be lifted, the object to be lifted can be connected through the two hooks, the worm motor is started in the forward direction, the rolling shafts drive the two rolling wheels to rotate, and the two rolling wheels lift the object to be lifted through the two steel wire ropes and the two hooks;

2. the connecting rod and the connecting groove are connected by the spring to provide elasticity for the elastic plate, the larger the elasticity provided by the spring is, the more stable the connecting rod and the connecting groove are connected, if the goods are overweight, the connecting circular plate extrudes the connecting rod to leave the corresponding connecting groove through the connecting groove, the purpose of driving the winding shaft to lift cannot be achieved, the I-shaped rod is pushed to move downwards by the two push rod motors, the spring is in a compressed state and is in the elasticity of the elastic plate, the stability of the connecting rod and the connecting groove is improved by the shaft, if the goods are too heavy and still can not be pulled up, the connecting rod still leaves the connecting groove after extrusion, the protection effect on the worm motor can be achieved, and the worm motor is prevented from being in a locking working state;

the utility model has simple structure, the elastic force is provided for the elastic plate through the spring, so that the connecting rod is connected with the connecting groove, the winding shaft can be driven to rotate, if the goods are too heavy and still can not be pulled up, the connecting rod still leaves the connecting groove continuously after being extruded, the protection effect can be provided for the worm motor, and the worm motor is prevented from being in a locking working state.

Drawings

FIG. 1 is a schematic diagram of the main structure of the present design;

FIG. 2 is a schematic cross-sectional view of FIG. 1 of the present design;

FIG. 3 is a schematic view of the portion A of FIG. 2 in the present design;

fig. 4 is a schematic view of the bottom view of the circular plate and the plurality of connecting rods in the present design.

In the figure: 1. a bottom plate; 2. a universal wheel; 3. a vertical rod; 4. a transverse top plate; 5. a rectangular box; 6. a wire rope; 7. a hook; 8. a through hole; 9. a winding shaft; 10. a winding wheel; 11. a push rod motor; 12. an I-shaped rod; 13. a spring; 14. an elastic plate; 15. a worm motor; 16. a circular plate; 17. a connecting rod; 18. a connecting circular plate; 19. a connecting groove; 20. a rotating rod; 21. a fixed rod; 22. a first bevel gear; 23. and a second bevel gear.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.

Referring to fig. 1-4, a gantry crane with overload protection structure, including two bottom plates 1, two the bottom of bottom plate 1 all is provided with universal wheel 2, all is provided with the brake block on two universal wheels 2, universal wheel 2 that sets up can conveniently to the global motion, the top of two bottom plates 1 all is provided with vertical pole 3, same horizontal roof 4 is installed at the top of two vertical poles 3, the bottom of horizontal roof 4 is provided with rectangle box 5, be provided with winding mechanism in the rectangle box 5, be provided with elastic mechanism on the top inner wall of rectangle box 5, be connected with elastic plate 14 on the elastic mechanism, install worm motor 15 on the elastic plate 14, install plectane 16 on the output shaft of worm motor 15, a plurality of connecting rods 17 are installed to the bottom of plectane 16, be provided with coupling mechanism in the rectangle box 5, coupling mechanism links to each other with coupling mechanism, coupling mechanism links to each other with winding mechanism.

In the embodiment, the elastic mechanism comprises two push rod motors 11, wherein the two push rod motors 11 are all arranged on the inner wall of the top of the rectangular box 5, I-shaped rods 12 are all arranged on the output shafts of the two push rod motors 11, an elastic plate 14 is slidably arranged on the outer sides of the two I-shaped rods 12, a spring 13 is sleeved on the outer sides of the I-shaped rods 12, the top ends of the springs 13 are connected with the I-shaped rods 12, and the bottom ends of the springs 13 are connected with the top ends of the elastic plates 14; the two push rod motors 11 are utilized to push the I-shaped rod 12 to move downwards, so that the spring 13 is in a compressed state and is in positive elastic force of the elastic plate 14, and the stability of connection of the connecting rod 17 and the connecting groove 19 is improved through the shaft.

In this embodiment, the connection mechanism includes a fixing rod 21, the fixing rod 21 is fixedly installed in the rectangular box 5, a rotating rod 20 is rotatably installed on the fixing rod 21, a connection circular plate 18 is installed at the top end of the rotating rod 20, a plurality of connection grooves 19 are formed at the top of the connection circular plate 18, and the bottom end of the connection rod 17 is arc-shaped and is adapted to the corresponding connection groove 19; the circular plate 16 drives the connection circular plate 18 to rotate by the cooperation of the plurality of connecting rods 17 and the plurality of connecting grooves 19, and the connection circular plate 18 drives the rotating rod 20 to rotate.

In the embodiment, the winding mechanism comprises a winding shaft 9, the winding shaft 9 is rotatably arranged in a rectangular box 5, two winding wheels 10 are sleeved on the outer sides of the winding shaft 9, steel wire ropes 6 are sleeved on the outer sides of the two winding wheels 10, hooks 7 are arranged at the bottom ends of the two steel wire ropes 6, two through holes 8 are formed in the bottom of the rectangular box 5, and the steel wire ropes 6 are movably connected with the corresponding through holes 8; the winding shaft 9 drives the two winding wheels 10 to rotate, and the two winding wheels 10 loosen and wind the two steel wire ropes 6.

In the embodiment, a first bevel gear 22 is arranged at the bottom end of the rotary rod 20, a second bevel gear 23 is sleeved on the outer side of the winding shaft 9, and the first bevel gear 22 is meshed with the second bevel gear 23; the rotary rod 20 rotates the take-up shaft 9 through a first bevel gear 22 and a second bevel gear 23.

Working principle: when in use, the device is pushed to integrally move, the device can conveniently move integrally through four universal wheels 2, a worm motor 15 and two push rod motors 11 are connected with a power supply and a control switch, firstly, the worm motor 15 is reversely started to drive a circular plate 16 to rotate, the circular plate 16 is matched with a plurality of connecting rods 17 and a plurality of connecting grooves 19 to drive a connecting circular plate 18 to rotate, the connecting circular plate 18 drives a rotating rod 20 to rotate, the rotating rod 20 drives a winding shaft 9 to rotate through a first bevel gear 22 and a second bevel gear 23, the winding shaft 9 drives two winding wheels 10 to rotate, the two winding wheels 10 loosen two steel wire ropes 6, the two steel wire ropes 6 drive the two hooks 7 to move downwards and approach an object to be lifted, the object to be lifted can be connected by the two hooks 7, then the worm motor 15 is started in a forward direction, the two winding wheels 10 are driven to rotate through the winding shaft 9, the two winding wheels 10 lift the object to be lifted through the two steel wire ropes 6 and the two hooks 7, the connecting rod 17 and the connecting groove 19 are connected through the spring 13 to provide elasticity for the elastic plate 14, the larger the elasticity provided by the spring 13 is, the more stable the connecting rod 17 and the connecting groove 19 are connected, if the goods are overweight, the connecting circular plate 18 extrudes the connecting rod 17 through the connecting groove 19 to leave the corresponding connecting groove 19, the purpose of driving the winding shaft 9 to lift cannot be achieved, the I-shaped rod 12 is pushed to move downwards by the two push rod motors 11, the spring 13 is in a compressed state and is in a positive elasticity of the elastic plate 14, the stability of connecting the connecting rod 17 and the connecting groove 19 is increased by the shaft, if the goods are too heavy and still can not be pulled up, the connecting rod 17 is extruded to leave the connecting groove 19 continuously, the protection effect on the worm motor 15 can be achieved, and the worm motor 15 is prevented from being in a locking working state.

The utility model is not limited to the above-mentioned best mode, any person can obtain other various products under the teaching of the utility model, but any change in shape or structure is within the scope of protection of the utility model, and all the technical schemes are the same or similar to the utility model.

Claims (8)

1. The utility model provides a gantry crane with overload protection structure, includes two bottom plates (1), and the top of two bottom plates (1) all is provided with vertical pole (3), its characterized in that: the top of two vertical pole (3) is installed same horizontal roof (4), and the bottom of horizontal roof (4) is provided with rectangle box (5), is provided with winding mechanism in rectangle box (5), is provided with elastic mechanism on the top inner wall of rectangle box (5), is connected with elastic plate (14) on the elastic mechanism, installs worm motor (15) on elastic plate (14), installs plectane (16) on the output shaft of worm motor (15), and a plurality of connecting rods (17) are installed to the bottom of plectane (16), are provided with coupling mechanism in rectangle box (5), and connecting rod (17) link to each other with coupling mechanism, and coupling mechanism links to each other with winding mechanism.

2. A gantry crane with overload protection structure as claimed in claim 1, characterized in that: the elastic mechanism comprises two push rod motors (11), the two push rod motors (11) are all installed on the inner wall of the top of the rectangular box (5), I-shaped rods (12) are all installed on output shafts of the two push rod motors (11), and an elastic plate (14) is slidably installed on the outer sides of the two I-shaped rods (12).

3. A gantry crane with overload protection structure as claimed in claim 2, characterized in that: the outside cover of I-shaped pole (12) is equipped with spring (13), and the top of spring (13) links to each other with I-shaped pole (12), and the bottom of spring (13) links to each other with the top of spring plate (14).

4. A gantry crane with overload protection structure as claimed in claim 1, characterized in that: the connecting mechanism comprises a fixing rod (21), the fixing rod (21) is fixedly arranged in the rectangular box (5), a rotating rod (20) is rotatably arranged on the fixing rod (21), a connecting circular plate (18) is arranged at the top end of the rotating rod (20), a plurality of connecting grooves (19) are formed in the top of the connecting circular plate (18), and the bottom end of the connecting rod (17) is in an arc-shaped arrangement and is matched with the corresponding connecting groove (19).

5. A gantry crane with overload protection structure as claimed in claim 1, characterized in that: the winding mechanism comprises a winding shaft (9), the winding shaft (9) is rotatably arranged in the rectangular box (5), two winding wheels (10) are sleeved on the outer sides of the winding shaft (9), steel wire ropes (6) are sleeved on the outer sides of the two winding wheels (10), and hooks (7) are arranged at the bottom ends of the two steel wire ropes (6).

6. A gantry crane with overload protection structure as claimed in claim 4, characterized in that: a first bevel gear (22) is arranged at the bottom end of the rotary rod (20), a second bevel gear (23) is sleeved on the outer side of the winding shaft (9), and the first bevel gear (22) is meshed with the second bevel gear (23).

7. A gantry crane with overload protection structure as claimed in claim 5, characterized in that: two through holes (8) are formed in the bottom of the rectangular box (5), and the steel wire rope (6) is movably connected with the corresponding through holes (8).

8. A gantry crane with overload protection structure as claimed in claim 1, characterized in that: the bottoms of the two base plates (1) are provided with universal wheels (2), and brake pads are arranged on the two universal wheels (2).