CN113894491A

CN113894491A - Device for realizing lifting and overturning of large-sized workpiece

Info

Publication number: CN113894491A
Application number: CN202111231782.6A
Authority: CN
Inventors: 李博; 曹正武
Original assignee: Shaanxi Fengrun Intelligent Manufacturing Research Institute Co ltd
Current assignee: Shaanxi Fengrun Intelligent Manufacturing Research Institute Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-01-07

Abstract

The invention discloses a device for realizing lifting and overturning of a large-sized workpiece, which is characterized by comprising a support frame set mechanism, a lifting mechanism, a power system and an overturning platform, wherein the lifting mechanism is arranged on the support frame set mechanism, the power system is fixedly arranged at the bottom of the support frame set mechanism, and the overturning platform is connected with the lifting mechanism. The device adopts a mode that worm wheels are driven by two sides of a double worm to control the overturning platform to ascend and descend or overturn, and has the advantages of simple structure, good economic performance, safety and reliability.

Description

Device for realizing lifting and overturning of large-sized workpiece

Technical Field

The invention belongs to the technical field related to machining, and particularly relates to a device for lifting and overturning a large-sized workpiece.

Background

In the prior art, for the welding of large-scale workpieces, flat welding seams, vertical welding seams and transverse welding seams exist, the welding quality of the flat welding seams is highest and the welding speed is fastest no matter manual welding or machine welding is conducted, and in order to improve the working efficiency and the welding quality, when the large-scale workpieces are welded, the workpieces are often required to be turned over.

However, in the process of turning over large-sized workpieces, a common factory adopts a plurality of cranes or a plurality of lifting hooks for matching operation, the matching is improper, the lifting mode is improper, accidents such as workpiece falling and the like are often caused, and due to the fact that the workpieces are large and heavy, the workpieces, peripheral equipment and even casualties are often caused after the workpieces fall. The lifting hook operation is usually through wire rope flexible coupling, and hoist and mount and the upset process rock, have aggravated the danger of upset process.

With the social development, industries such as wind power generation, automobile industry, agricultural machinery, aerospace and the like are developed vigorously, and large workpieces in the industries often face safety problems caused by workpiece overturning in manufacturing.

The existing common overturning tool is often composed of a lifting drive part and an overturning drive part, the power input of the overturning drive part needs to pass through devices such as a drag chain and the like, and the damage rate is high; the conventional common overturning tool has the advantages of high overturning drive required power, large overturning drive volume, heavy weight and high loss; in the existing common turnover tool, a planetary reducer is often used for transferring the power of a motor or a hydraulic motor to a turnover table in turnover driving, and the power shortage caused by power failure, hydraulic oil leakage and the like can cause the workpiece to be communicated with the turnover table to rotate freely together, so that accidents are caused; in order to avoid the problem, a common lifting turnover mechanism needs to be additionally provided with a locking mechanism or a brake mechanism, and is complex in design, poor in economic performance and safety performance.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme:

a device for realizing lifting and overturning of a large-sized workpiece comprises a bracket set mechanism, a lifting mechanism, a power system and an overturning platform, wherein the lifting mechanism is arranged on the bracket set mechanism, the power system is fixedly arranged at the bottom of the bracket set mechanism, and the overturning platform is connected with the lifting mechanism;

the support group mechanism consists of two side frame groups and two transverse frame groups, and the transverse frame groups are fixedly welded between the bottoms of the side frame groups;

the lifting mechanism comprises guide shafts, lifting worms, a sliding block, worm wheels and inner rings, wherein the guide shafts are fixedly arranged in the middle of the side frame group, the number of the lifting worms is two, the upper ends of the lifting worms are hinged with the side frame group, the lower ends of the lifting worms are connected with a power system, through holes are formed in the sliding block, the sliding block is connected to the guide shafts and the lifting worms in a penetrating mode, one surface of the sliding block is rigidly connected with the inner rings, the inner rings and the worm wheels rotate relatively through steel balls to form a rotary support, the worm wheels are rigidly connected with the overturning platform, and the worm wheels are meshed with the lifting worms through gears;

the power system comprises a motor base, a motor, a coupler, a bevel gear steering gear, a transmission shaft and a speed reducer, the motor is connected with the bevel gear steering gear through the coupler, the motor is rigidly connected with the bevel gear steering gear on the motor base, the two ends of the bevel gear steering gear are respectively provided with the speed reducer connected through the transmission shaft, the speed reducer base is fixedly connected to the underframe of the transverse frame assembly, and the speed reducer is connected to the bottom of the lifting worm in a penetrating manner.

In the further scheme, the method comprises the following steps of,

the reducer is a worm reducer.

In the further scheme, the method comprises the following steps of,

the power systems are distributed in two groups in parallel and fixed on the underframe of the transverse frame group.

In the further scheme, the method comprises the following steps of,

the device is provided with two groups of lifting mechanisms, and the number of the lifting worms is 4, namely a first lifting worm, a second lifting worm, a third lifting worm and a fourth lifting worm.

In the further scheme, the method comprises the following steps of,

the lifting and overturning device is also provided with an electric control safety mechanism, and the electric control safety mechanism comprises an upper limit sensor, a lower limit sensor, a reflective distance measuring sensor, a light curtain sensing mechanism and a PLC (programmable logic controller);

the upper limit sensor and the reflective ranging sensor are respectively arranged at the top of the side frame group, the lower limit sensor is arranged at the bottom of the side frame group, the light curtain sensing mechanism is arranged above the power system in parallel, and a light curtain emitting device and a light curtain receiving device in the light curtain sensing mechanism are respectively fixed at two sides of the side frame group;

the PLC controller is electrically connected with the whole electric control safety mechanism and the motor.

In the further scheme, the method comprises the following steps of,

the side frame group can be provided with an emergency stop button which is respectively electrically connected with the PLC and the motor.

In the further scheme, the method comprises the following steps of,

the power system may alternatively be powered by a hydraulic system.

In the further scheme, the method comprises the following steps of,

the number of the power systems can be four groups of hydraulic systems which respectively drive the first lifting worm, the second lifting worm, the third lifting worm and the fourth lifting worm.

The beneficial effect of adopting above-mentioned technical scheme is:

the device adopts a mode that worm wheels are driven by two sides of a double worm to control the overturning platform to ascend and descend or overturn, and has the advantages of simple structure, good economic performance, safety and reliability.

1. The structure is simple, and the worm wheels are driven by the worms on the two sides to realize lifting and overturning;

1) when the single-side worm is lifted, the lifting force only needs to be half of the lifting force, and the workpiece can be lifted and turned over simultaneously;

2) when the two-sided worm is lifted simultaneously, the lifting speed is 2 times of that of the single-sided worm;

3) the workpiece can rotate around the overturning axis by lifting and lowering the worms on the two sides;

4) the worm on one side is not moved, and the worm on one side is lifted, so that the workpiece can roll and turn over along the axis and move upwards or downwards.

2. The control logic is simple and convenient, and only the positive and negative rotation of the two motors needs to be controlled;

3. the economy is high, and the driving is simple;

4. the safety performance is high, and the automatically controlled safety system guarantees that equipment is reliable, can prevent personnel from entering the work area and consequently causing bodily injury.

Drawings

FIG. 1 is a schematic view of the structure of the device of the present invention;

FIG. 2 is an enlarged schematic view of the lifting mechanism of the device of the present invention;

FIG. 3 is an enlarged schematic view of the slider;

FIG. 4 is an enlarged schematic view of the powertrain;

FIG. 5 is a schematic view of the structure and the operation direction of the lifting mechanism when the workpiece is lifted;

FIG. 6 is a schematic view of the structure and the running direction of the lifting mechanism when the workpiece descends;

FIG. 7 is a schematic view of the structure and the operation direction of the lifting mechanism when the workpiece is turned over;

FIG. 8 is a schematic view of the structure and the operation direction of the lifting mechanism during the edge lifting and turning;

FIG. 9 is a schematic view of an installation structure of the electric control safety mechanism;

fig. 10 is a schematic diagram of the operation of the device of the invention.

1. A support set mechanism; 12. a side frame group; 13. a transverse frame group;

2. a lifting mechanism; 21. a guide shaft; 22. a lifting worm; 23. a slider; 24. a worm gear; 25. an inner ring; 26. a steel ball; 221. a first lifting worm; 222. a second lifting worm; 223. a third lifting worm; 224. a fourth lifting worm;

3. a power system; 31. a motor base; 32. a motor; 33. a coupling; 34. bevel gear steering gear; 35. a drive shaft; 36. a speed reducer;

4. a turning table; 5. an electrically controlled safety mechanism; 51. an upper limit sensor; 52. a lower limit sensor; 53. a reflective ranging sensor; 54. a light curtain sensing mechanism;

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention,

detailed description of the preferred embodiment 1

As shown in fig. 1, a device for realizing lifting and overturning of a large-sized workpiece comprises a support set mechanism 1, a lifting mechanism 2, a power system 3 and an overturning platform 4, wherein the lifting mechanism 2 is arranged on the support set mechanism 1, the power system 3 is fixedly arranged at the bottom of the support set mechanism 1, and the overturning platform 4 is connected with the lifting mechanism 2; the support frame group mechanism 1 consists of two side frame groups 12 and two cross frame groups 13, wherein the cross frame groups 13 are fixedly welded between the bottoms of the side frame groups 12;

referring to fig. 1, 2 and 3, two sets of lifting mechanisms 2 are provided, which are respectively disposed on two sides of the side frame group 12 in the support frame group mechanism 1, and each lifting mechanism 2 includes a guide shaft 21, a lifting worm 22, a slider 23, a worm wheel 24 and an inner ring 25, wherein the guide shaft 21 is fixedly disposed in the middle of the side frame group 12, and the lifting worms 22 include 4 lifting worms, which are respectively a first lifting worm 221, a second lifting worm 222, a third lifting worm 223 and a fourth lifting worm 224.

The upper end of a lifting worm 22 is hinged with the side frame group 12, the lower end of the lifting worm 22 is connected with a power system 3, a through hole 24 is formed in a sliding block 23, the sliding block 23 is connected to a guide shaft 21 and the lifting worm 22 in a penetrating mode, one surface of the sliding block 23 is rigidly connected with an inner ring 25, the inner ring 25 and a worm wheel 24 rotate relatively through a steel ball 26 to form a slewing bearing, the worm wheel 24 is rigidly connected with the overturning platform 4, and the worm wheel 24 is meshed with the lifting worm 22 through a gear;

as shown in fig. 4, the power systems 3 are two groups, distributed in parallel and fixed on the underframe of the cross frame group 13. The power system 3 comprises a motor base 31, a motor 32, a coupler 33, a bevel gear steering gear 34, a transmission shaft 35 and a speed reducer 36, the motor 32 is connected with the bevel gear steering gear 34 through the coupler 33, the motor 32 is rigidly connected with the bevel gear steering gear 34 on the motor base 31, the two ends of the bevel gear steering gear 34 are respectively provided with the speed reducer 36 connected through the transmission shaft 35, the base of the speed reducer 36 is fixedly connected on the bottom frame of the transverse frame group 13, and the speed reducer 36 is connected to the bottom of the lifting worm 22 in a penetrating manner. The reducer 36 is a worm reducer.

The motor 32 transmits power to the worm speed reducer 36 through the bevel gear steering gear 34, the worm speed reducer 36 transmits power and torque to the lifting worm 22, and both the bevel gear steering gear 34 and the worm speed reducer 36 can realize speed reduction and torque improvement;

the working principle is as follows: the power system 3 drives the first lifting worm 221 and the second lifting worm 222 to rotate, and the power system 3 drives the third lifting worm 223 and the fourth lifting worm 224 to rotate. The motor 32 in the power system 3 can realize positive and negative rotation, so that the positive and negative rotation of the lifting worm can be realized.

The first lifting worm 221 and the second lifting worm 222 always rotate in the same direction, the third lifting worm 223 and the fourth lifting worm 224 always rotate in the same direction, and the worm wheel 24 of the lifting mechanism 2 is always coaxial with the center.

When the first lifting worm 221 and the fourth lifting worm 224 turn in the same direction, the workpiece vertically rises or falls; when a lifting worm 221 and a fourth lifting worm 224 rotate oppositely, the workpiece rotates along the overturning axis; when one of the elevating worm 221 and the fourth elevating worm 224 is stationary and the other is rotated, the workpiece is moved upward or downward while being flipped.

As shown in fig. 5, when the workpiece is lifted, the first lifting worm 221 and the second lifting worm 222 rotate in the forward direction, the third lifting worm 223 and the fourth lifting worm 224 rotate in the forward direction, the inner side and the outer side of the worm wheel 24 move upward at a constant speed relative to the fourth lifting worm 224 and the first lifting worm 221, the worm wheel 24 moves vertically upward, and further, the reversing table and the workpiece vertically lift.

As shown in fig. 6, when the workpiece is lowered, the first lifting worm 221 and the second lifting worm 222 rotate reversely, the third lifting worm 223 and the fourth lifting worm 224 rotate reversely, the inner side and the outer side of the worm wheel 24 move downward at a constant speed relative to the fourth lifting worm 224 and the first lifting worm 221, the worm wheel 24 moves vertically downward, and further, the reversing table and the workpiece are lowered vertically.

As shown in fig. 7, when the workpiece is turned over, when the first lifting worm 221 and the second lifting worm 222 rotate in the forward direction, the third lifting worm 223 and the fourth lifting worm 224 rotate in the reverse direction, the worm wheel 24 descends relative to the fourth lifting worm 224, but at the same time, the worm wheel 24 moves upward at a constant speed relative to the first lifting worm 221, and because the speeds of the two sides of the worm wheel 24 are equal, the worm wheel 24 rotates around the turning axis, and further, the turning table and the workpiece rotate along the turning axis, so that the workpiece is turned over.

As shown in fig. 8, when the workpiece is turned over while rising: when the first lifting worm 221 and the second lifting worm 222 are not moved, the third lifting worm 223 and the fourth lifting worm 224 are rotated in a positive direction, the worm wheel 24 is not moved relative to the fourth lifting worm 224, but the worm wheel 24 moves upward at a constant speed relative to the first lifting worm 221, so that the axis of the worm wheel 24 rolls upward along the fourth lifting worm 224, and further, the overturning platform and the workpiece roll upward along the overturning axis, and the workpiece is overturned while being lifted.

Because the lifting and turning are realized only by the worm wheel 24 and the lifting worm 22, the worm wheel 24 and the lifting worm 22 have self-locking performance, when the lifting worm 22 stops rotating, the worm wheel 24 can be self-locked and cannot be displaced along the lifting worm 22.

When power of the power system 3 is lost due to power failure, mechanical damage and the like, the worm wheel 24 has no relative displacement relative to the lifting worm 22, so that the workpiece is in a static state without any locking mechanism, any contracting brake mechanism and the like. The structure is simple, the worm wheels are driven by the worms on two sides, the lifting and the overturning are realized, the control logic is simple and convenient, and only the positive and negative rotation of the two motors needs to be controlled.

Example 2

As shown in fig. 9, the invention further discloses a lifting and turning device, on the basis of the first embodiment, an electric control safety mechanism 5 can be additionally arranged, and the electric control safety mechanism 5 comprises an upper limit sensor 51, a lower limit sensor 52, a reflective distance measuring sensor 53, a light curtain sensing mechanism 54 and a PLC controller.

The upper limit sensor 51 and the reflective ranging sensor 53 are respectively arranged at the top of the side frame set 12, the lower limit sensor 52 is arranged at the bottom of the side frame set 12, the light curtain sensing mechanism 54 is arranged above the power system 3 in parallel, and the light curtain emitting device 541 and the light curtain receiving device 542 in the light curtain sensing mechanism 54 are respectively fixed at two sides of the side frame set 12; the PLC controller is electrically connected with the whole electric control safety mechanism 5 and the motor 32. The side frame assembly 12 may also be provided with an emergency stop button, which is electrically connected to the PLC controller and the motor 32, respectively. The upper limit sensor 51, the lower limit sensor 52, the reflective ranging sensor 53 and the light curtain sensing mechanism 54 collect signals, the signals are transmitted to the PLC, and the PLC controls the power system 3 to start and stop.

As shown in fig. 10, the specific working principle is as follows: when the sliding block 23 ascends and descends, the reflective ranging sensor 53 detects the distance from the sliding block 23, so that the ascending and descending height of the sliding block 23 is calculated, and once the sliding block 23 exceeds the preset height, the PLC 55 controls the motor 32 to stop running;

when the sliding block 23 falls, once the sliding block touches the lower limit sensor 52, a signal is transmitted to the PLC controller, and the PLC controller controls the motor 32 to stop, so that the equipment is prevented from being damaged;

when the sliding block 23 rises, once the sliding block touches the upper limit sensor 51, a signal is transmitted to the PLC controller, and the PLC controller controls the motor 32 to stop, so that the equipment is prevented from being damaged;

in any emergency situation, the emergency stop button can be manually controlled, so that the motor 32 can stop, and the fault is avoided;

when the workpiece is lifted or turned over, any object enters the working area and triggers the light curtain sensing mechanism 54, so that a signal is transmitted to the PLC, the motor 32 is controlled to stop, misoperation during turning over the workpiece is prevented, and the safety of personnel entering the working area is protected to the maximum extent. The model of the PLC is Mitsubishi fx5U product.

Example 3

On the basis of embodiment 1, the power system 3 can be powered by a hydraulic system instead.

Example 4

On the basis of embodiment 1, the number of the power systems 3 may be four groups of hydraulic systems, and the hydraulic systems respectively drive the first lifting worm 221, the second lifting worm 222, the third lifting worm 223, and the fourth lifting worm 224.

While the invention has been described with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and in particular, features of various embodiments of the invention may be combined in any manner so long as there is no technical conflict, and the combination is not exhaustive in the invention for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed herein, but that the invention will include the claims appended hereto.

Claims

1. A device for realizing lifting and overturning of a large-sized workpiece is characterized by comprising a support group mechanism (1), a lifting mechanism (2), a power system (3) and an overturning platform (4), wherein the lifting mechanism (2) is arranged on the support group mechanism (1), the power system (3) is fixedly arranged at the bottom of the support group mechanism (1), and the overturning platform (4) is connected with the lifting mechanism (2);

the support group mechanism (1) consists of two side frame groups (12) and two transverse frame groups (13), wherein the transverse frame groups (13) are fixedly welded between the bottoms of the side frame groups (12);

wherein the two groups of lifting mechanisms (2) are respectively and correspondingly arranged at two sides of the side frame set (12) in the support set mechanism (1), each lifting mechanism (2) comprises two guide shafts (21), two lifting worms (22), a sliding block (23), a worm wheel (24) and an inner ring (25), the guide shafts (21) are fixedly arranged in the middle of the side frame set (12), the two lifting worms (22) are in number, the upper ends of the lifting worms (22) are hinged with the side frame set (12), the lower ends of the lifting worms (22) are connected with the power system (3), the sliding block (23) is provided with a through hole (24), the sliding block (23) is in through connection with the guide shafts (21) and the lifting worms (22), one surface of the sliding block (23) is rigidly connected with the inner ring (25), the inner ring (25) and the worm wheel (24) relatively rotate through a steel ball (26) to form a slewing bearing, the worm wheel (24) is rigidly connected with the overturning platform (4), and the worm wheel (24) is meshed with the lifting worm (22) through a gear;

wherein driving system (3) comprises motor base (31), motor (32), shaft coupling (33), bevel gear steering gear (34), transmission shaft (35) and speed reducer (36), motor (32) with pass through between bevel gear steering gear (34) shaft coupling (33) are connected, and motor (32) with bevel gear steering gear (34) rigid connection is in on motor base (31), bevel gear steering gear (34) both ends are provided with respectively through transmission shaft (35) are connected speed reducer (36), speed reducer (36) base fixed connection is on horizontal frame group (13) chassis, and speed reducer (36) through connection is in elevator worm (22) bottom.

2. The device for realizing the lifting and overturning of the large-sized workpiece according to claim 1, wherein the reducer (36) is a worm reducer.

3. The device for realizing the lifting and overturning of the large-sized workpiece is characterized in that the power systems (3) are distributed in two groups in parallel and fixed on the underframe of the transverse frame group (13).

4. The device for realizing the lifting and overturning of the large-sized workpiece is characterized in that the lifting mechanisms (2) in the device are divided into two groups, and the number of the lifting worms (22) is 4, namely a first lifting worm (221), a second lifting worm (222), a third lifting worm (223) and a fourth lifting worm (224).

5. The device for realizing the lifting and overturning of the large-sized workpiece according to claim 1, wherein an electric control safety mechanism (5) is further arranged on the device for lifting and overturning, and the electric control safety mechanism (5) comprises an upper limit sensor (51), a lower limit sensor (52), a reflective ranging sensor (53), a light curtain sensing mechanism (54) and a PLC (programmable logic controller);

the upper limit sensor (51) and the reflective ranging sensor (53) are respectively arranged at the top of the side frame set (12), the lower limit sensor (52) is arranged at the bottom of the side frame set (12), the light curtain sensing mechanism (54) is arranged above the power system (3) in parallel, and a light curtain emitting device (541) and a light curtain receiving device (542) in the light curtain sensing mechanism (54) are respectively fixed at two sides of the side frame set (12);

the PLC is electrically connected with the whole electric control safety mechanism (5) and the motor (32).

6. The device for realizing the lifting and overturning of the large-sized workpiece according to claim 5 is characterized in that an emergency stop button can be arranged on the side frame group (12), and the emergency stop button is electrically connected with the PLC and the motor (32) respectively.

7. The device for realizing the lifting and overturning of the large-sized workpiece is characterized in that the power system (3) is alternatively powered by a hydraulic system.

8. The device for realizing the lifting and overturning of the large-sized workpiece according to claim 4 is characterized in that the number of the power systems (3) can be four groups of hydraulic systems, and the hydraulic systems respectively drive the first lifting worm (221), the second lifting worm (222), the third lifting worm (223) and the fourth lifting worm (224).