CN210393589U

CN210393589U - Follow-up device of lifting mechanism

Info

Publication number: CN210393589U
Application number: CN201921166844.8U
Authority: CN
Inventors: 王超; 申传海; 袁贵芳
Original assignee: Fangding Technology Co Ltd
Current assignee: Fangding Technology Co Ltd
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-04-24
Anticipated expiration: 2029-07-24

Abstract

A follow-up device of a lifting mechanism relates to a movement coordination device of the lifting mechanism, in particular to a follow-up device which can coordinate the action coordination of two telescopic cylinders of the lifting mechanism. The method is characterized in that: the telescopic device comprises a first telescopic cylinder, a second telescopic cylinder, a first working arm, a second working arm, a bottom plate and a sliding block; two ends of the first telescopic cylinder are respectively hinged with the bottom plate and the first working arm, two ends of the first working arm are respectively hinged with the bottom plate and the second working arm, and two ends of the second telescopic cylinder are respectively hinged with the second working arm and the first working arm; the first working arm is provided with a slideway, and the sliding block is connected with the slideway of the first working arm in a sliding manner; a shifting fork, a first microswitch and a second microswitch are arranged in a cavity of the sliding block, one end of the shifting fork is hinged with the sliding block, and the other end of the shifting fork is positioned in the middle of the first microswitch and the second microswitch. The electric control is simple, so that the control stability and the reliability are high. Thereby the actions of the first telescopic cylinder and the second telescopic cylinder are coordinated.

Description

Follow-up device of lifting mechanism

Technical Field

The utility model relates to a support mechanism motion coordination device, especially a can coordinate two telescoping cylinder action complex servo unit of support mechanism.

Background

① the method for coordinating actions includes that ① two or more cylinders or hydraulic cylinders are installed in a branch way by using the same pipeline, when the cylinders need to be extended or retracted simultaneously, gas (oil) is injected or exhausted into the corresponding same pipeline, ② the cylinders or hydraulic cylinders are controlled automatically or manually in a subsection way, for example, two cylinders are used, the first cylinder is operated to a certain position, the second cylinder is operated to a certain position, then the first cylinder is operated to a certain position, and the execution is carried out in sequence, ③ a servo system is installed on the cylinder needing coordinating actions, or the servo cylinder is used and the PLC equipment is used for controlling and driving.

However, the above-mentioned solutions have respective disadvantages that ① uses the same pipeline for the two cylinders or hydraulic cylinders, when they operate simultaneously, some cylinder or hydraulic cylinder will have advance and lag phenomena with the change of load, and it is difficult to achieve coordination, ② for the second embodiment, controlling the cylinders or hydraulic cylinders in sections will slow down the control process, when the control requirement is high, the two cylinders or hydraulic cylinders will have inching forward phenomena, the control method becomes complicated, especially manually controlling the cylinders or hydraulic cylinders, is affected by human factors, the working strength is large, and when the operation coordination is needed, the working is extremely unstable, ③ for the third embodiment, this control method has the best control effect, but the control cost is very high.

Disclosure of Invention

An object of the utility model is to provide a not enough to above prior art, provide a mechanism servo device lifts, reach the action coordination unanimous purpose of initiative position and follow-up position between the telescoping cylinder.

The utility model provides a lift mechanism servo device, its characterized in that: the telescopic device comprises a first telescopic cylinder, a second telescopic cylinder, a first working arm, a second working arm, a bottom plate and a sliding block; two ends of the first telescopic cylinder are respectively hinged with the bottom plate and the first working arm, two ends of the first working arm are respectively hinged with the bottom plate and the second working arm, and two ends of the second telescopic cylinder are respectively hinged with the second working arm and the first working arm; the first working arm is provided with a slideway, and the sliding block is connected with the slideway of the first working arm in a sliding manner; a shifting fork, a first microswitch and a second microswitch are arranged in the cavity of the sliding block, one end of the shifting fork is hinged with the sliding block, and the other end of the shifting fork is positioned in the middle of the first microswitch and the second microswitch; one end of the steel cable is fixedly connected with the bottom plate, and the other end of the steel cable is connected with the shifting fork; the shifting fork is connected with one end of a first extension spring, and the other end of the first extension spring is fixedly connected with the sliding block; the second working arm is hinged with the upper end of the connecting rod, and the lower end of the connecting rod is hinged with the sliding block.

The sliding connection mode is as follows: the slide is T type slide, and the tank bottom width of T type slide is greater than the width of notch, and the both sides of the lower extreme of slider are equipped with the guide block respectively, and the guide block is placed at the tank bottom of T type slide.

The upper end of above-mentioned shift fork is equipped with the stopper, stopper and the diapire fixed connection of slider cavity.

The first working arm is provided with a steel cable hole, one side of the first working arm is provided with a first pulley and a second pulley, and the other side of the first working arm is provided with a third pulley; the other end of the steel cable is wound around the first pulley and the second pulley, passes through the steel cable hole and is connected with the shifting fork around the third pulley.

The bottom plate is fixedly provided with a steel cable fixing point, and the steel cable is connected with the steel cable fixing point through a second extension spring.

Compared with the prior art, the utility model discloses following outstanding beneficial effect has:

1. this device drives the shift fork through cable wire and first extension spring and touches first micro-gap switch and second micro-gap switch, and most structures are accomplished by mechanical part, and the electric control part is the flexible of first telescoping cylinder of first micro-gap switch and second micro-gap switch control and second telescoping cylinder, and electric control is simple, makes control stability, and the reliability is high.

2. The device utilizes the first telescopic cylinder to drive the first working arm to act to generate a feedback signal, then drives the second telescopic cylinder to drive the second working arm to act, and further the position feedback of the second working arm follows the position feedback of the first working arm, so that the actions of the first telescopic cylinder and the second telescopic cylinder are coordinated and consistent.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a schematic structural diagram of the slider portion of the present invention.

Fig. 3 is a schematic structural diagram of the first working arm of the present invention.

Fig. 4 is a sectional view of a portion a-a in fig. 3.

Detailed Description

The invention is further described with reference to the drawings and the detailed description. For convenience of description, one end of the device where the first telescopic cylinder 11 is installed is a left end, and the other end is a right end.

As shown in fig. 1, the present invention includes a first telescopic cylinder 11, a second telescopic cylinder 14, a first working arm 15, a second working arm 13, a bottom plate 19 and a slider 7.

The left end of the first telescopic cylinder 11 is hinged with the bottom plate 19, and the right end of the first telescopic cylinder 11 is hinged with the lower half part of the first working arm 15. The lower end of the first working arm 15 is hinged with the bottom plate 19, and the upper end is hinged with the left end of the second working arm 13. The upper end of the second telescopic cylinder 14 is hinged with the left half part of the second working arm 13, and the lower end is hinged with the lower end of the first working arm 15.

As shown in fig. 3 and 4, a slide is disposed on the first working arm 15, and the slide 7 is slidably connected to the slide of the first working arm 15, in this embodiment, the sliding connection manner is as follows: the slide is T type slide, and the tank bottom width of T type slide is greater than the width of notch, and the both sides of the lower extreme of slider 7 are equipped with the guide block respectively, and the guide block is placed at the tank bottom of T type slide.

As shown in fig. 2, the slider 7 is provided with a hole cavity with an open upper end, a shifting fork 8, a first microswitch 4 and a second microswitch 5 are arranged in the cavity of the slider 7, the first microswitch 4 and the second microswitch 5 are symmetrically arranged, one end of the shifting fork 8 is hinged with the slider 7, and the other end of the shifting fork 8 is positioned in the middle of the first microswitch 4 and the second microswitch. The upper end of shift fork 8 is equipped with stopper 1, stopper 1 and the diapire fixed connection of slider 7 cavity, and when stopper 1 can prevent that 2 are taut of cable wire, shift fork 8 continues to move along 2 taut directions of cable wire after oppressing first micro-gap switch 4 to damage first micro-gap switch 4.

In the optimization scheme, the shifting fork 8 is connected with one end of the first extension spring 6, and the other end of the first extension spring 6 is fixedly connected with the sliding block 7. When the steel cable 2 is relaxed, the tension of the first extension spring 6 can press the second microswitch 5 to act, and the microswitch is damaged due to overlarge tension.

The weight of the fork 8 should not be too large, and in principle, when the first working arm 15 is perpendicular to the ground, the weight of the fork is not enough to press the second microswitch 5.

First pulley 17 and second pulley 10 are installed to one side of first work arm 15, and third pulley 16 is installed to the opposite side, and institute's bottom plate 19 fixed mounting has cable wire fixed point 18, is equipped with cable wire hole 9 on the first work arm 15, and the one end and the cable wire fixed point 18 fixed connection of cable wire 2, the other end is walked around first pulley 17 and second pulley 10, is passed cable wire hole 9, is walked around third pulley 16 and is connected with shift fork 8. The second working arm 13 is hinged with the upper end of the connecting rod 3, and the lower end of the connecting rod 3 is hinged with the sliding block 7.

In an optimized scheme, the wire rope 2 is connected with the wire rope fixing point 18 through the second extension spring 12, and the second extension spring 12 can prevent the wire rope 2 from being pulled to be excessively tightened and broken when the first working arm 15 and the second working arm 13 overshoot.

The operation flow is as follows: when the first telescopic cylinder 11 extends, the first working arm 15 is lifted, the steel cable 2 connected to the steel cable fixing point 18 passes through the first pulley 17 and the second pulley 10, the steel cable hole 9 penetrating through the first working arm 15 passes through the third pulley 16 to pull the shifting fork 8 on the sliding block 7, and presses the first microswitch 4, the signal of the first microswitch 4 controls the second telescopic cylinder 14 to extend, the second telescopic cylinder 14 drives the second working arm 13 to lift, the connecting rod 3 connected to the second working arm 13 acts with the following action to pull the sliding block 7 to move along the sliding way on the first working arm 15 to the pulling direction of the steel cable 2 until the distance of pulling of the steel cable 2 is offset, the shifting fork 8 on the sliding block 7 returns to the middle position, the first microswitch 4 is released, the extending action of the second telescopic cylinder 14 stops, and one-time positive direction following adjustment is completed.

When the first telescopic cylinder 11 retracts, the first working arm 15 descends, the steel cable 2 connected to a steel cable fixing point 18 relaxes, the shifting fork 8 on the sliding block 7 is pulled by the first extension spring 6 to press the second microswitch 5, the signal of the second microswitch 5 controls the retraction action of the second telescopic cylinder 14, the second telescopic cylinder 14 drives the second working arm 13 to descend, the connecting rod 3 connected to the second working arm 13 pushes the sliding block 7 to move along the slideway on the first working arm 15 in the direction opposite to the pulling direction of the steel cable 2 along with the action until the steel cable 2 recovers to eliminate the relaxation state, the shifting fork 8 on the sliding block 7 returns to the middle position, the second microswitch 5 releases, the retraction action of the second telescopic cylinder 14 stops, and one-time follow-up adjustment in the opposite direction is completed

It should be noted that while the invention has been described in detail with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various obvious changes can be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a mechanism servo-device lifts which characterized in that: comprises a first telescopic cylinder (11), a second telescopic cylinder (14), a first working arm (15), a second working arm (13), a bottom plate (19) and a sliding block (7); two ends of the first telescopic cylinder (11) are respectively hinged with the bottom plate (19) and the first working arm (15), two ends of the first working arm (15) are respectively hinged with the bottom plate (19) and the second working arm (13), and two ends of the second telescopic cylinder (14) are respectively hinged with the second working arm (13) and the first working arm (15); the first working arm (15) is provided with a slideway, and the sliding block (7) is connected with the slideway of the first working arm (15) in a sliding manner; a shifting fork (8), a first microswitch (4) and a second microswitch (5) are arranged in a cavity of the sliding block (7), one end of the shifting fork (8) is hinged with the sliding block (7), and the other end of the shifting fork is positioned in the middle of the first microswitch (4) and the second microswitch; one end of the steel cable (2) is fixedly connected with the bottom plate (19), and the other end of the steel cable is connected with the shifting fork (8); the shifting fork (8) is connected with one end of the first extension spring (6), and the other end of the first extension spring (6) is fixedly connected with the sliding block (7); the second working arm (13) is hinged with the upper end of the connecting rod (3), and the lower end of the connecting rod (3) is hinged with the sliding block (7).

2. A lifting mechanism follower according to claim 1, wherein: the sliding connection mode is as follows: the slide is T type slide, and the tank bottom width of T type slide is greater than the width of notch, and the both sides of the lower extreme of slider (7) are equipped with the guide block respectively, and the guide block is placed at the tank bottom of T type slide.

3. A lifting mechanism follower according to claim 1, wherein: the upper end of the shifting fork (8) is provided with a limiting block (1), and the limiting block (1) is fixedly connected with the bottom wall of the cavity of the sliding block (7).

4. A lifting mechanism follower according to claim 1, wherein: a steel cable hole (9) is formed in the first working arm (15), a first pulley (17) and a second pulley (10) are mounted on one side of the first working arm (15), and a third pulley (16) is mounted on the other side of the first working arm; the other end of the steel cable (2) rounds the first pulley (17) and the second pulley (10), passes through the steel cable hole (9), rounds the third pulley (16) and is connected with the shifting fork (8).

5. A lifting mechanism follower according to claim 1, wherein: the bottom plate (19) is fixedly provided with a steel cable fixing point (18), and the steel cable (2) is connected with the steel cable fixing point (18) through a second extension spring (12).