CN211644468U

CN211644468U - Hydraulic lifting mechanism of car carrier

Info

Publication number: CN211644468U
Application number: CN201922123021.3U
Authority: CN
Inventors: 李县; 王士博; 于继泰
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-10-09
Anticipated expiration: 2029-12-02

Abstract

The utility model discloses a hydraulic lifting mechanism of a car carrier, which comprises a chassis, a hydraulic oil cylinder, a safety arm, a lifting long arm, a slide block, a lifting short arm and an upper platform; the bottom of the lifting mechanism is fixed at the tail part of the chassis through a pin shaft, the top of the lifting mechanism is connected with an inclined track of the upper platform in a sliding block connection mode, and a pair of lifting mechanisms are arranged on two sides of the tail part of the chassis in a staggered mode to jointly complete lifting action; the hydraulic cylinder, the lifting short arm, the safety arm and the sliding block are respectively hinged with the lifting long arm; when the safety arm is lifted to a certain height for operation, a safety pin is inserted into a pin hole in the safety arm to fix the lifting height, so that the safety is ensured. The lifting mechanism has stable lifting action, high lifting efficiency and high safety performance, does not have lifting dead points, and effectively prevents safety accidents.

Description

Hydraulic lifting mechanism of car carrier

Technical Field

The invention relates to the technical field of lifting devices, in particular to a hydraulic lifting mechanism of a car carrier.

Background

When the lifting mechanism of the existing car trolley works, the following defects exist in the lifting process: 1. when the hydraulic cylinder is lifted to a certain angle, the upper platform is difficult to lift, so that the situation that the hydraulic cylinder is difficult to lift occurs under the rated working pressure of the hydraulic cylinder. 2. In the process of lifting, when the condition of the defect 1 appears, in order to continue lifting, oil supply of the hydraulic cylinder needs to be increased, the thrust of the hydraulic cylinder is increased, the upper platform tightly pulls the upright column in front, so that the front upright column is subjected to large pulling force, and the front upright column is deformed and moves backwards. 3. After the maximum stress angle is broken through, a sudden change occurs in the speed, so that the lifting is unstable, and potential safety hazards are easy to occur.

SUMMERY OF THE UTILITY MODEL

In defect to among the prior art, the utility model provides a hydraulic pressure lifting mechanism can improve the system of lifting and lift efficiency, lifts action stationarity simultaneously, simple to operate and the security is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a hydraulic lifting mechanism of a car carrier comprises a chassis, a hydraulic oil cylinder, a safety arm, a lifting long arm, a sliding block, a lifting short arm and an upper platform; the hydraulic oil cylinder is connected with the chassis by a pin shaft, and a piston rod of the hydraulic oil cylinder is connected with the lifting long arm by the pin shaft; two ends of the lifting long arm are respectively connected with the chassis and the sliding block through pin shafts; the slide block is positioned in a slide block guide rail of the upper platform; the short lifting arm is hinged with the upper platform and the long arm respectively, wherein a pin shaft hinged with the upper platform is positioned in a groove hole which is inclined on the upper platform; the safety arm is fixed on the chassis and the long arm through pin shafts at two ends, and in order to ensure safety, when the vehicle starts to be loaded or unloaded after being lifted to a certain height, a safety pin is inserted on the safety arm, so that the hydraulic cylinder is protected.

Furthermore, the contact surface between the upper platform guide rail and the sliding block is an inclined surface, so that the sliding block can slide backwards in the lifting process.

Furthermore, a certain gap exists between the lower baffle of the upper platform track and the sliding block, so that the sliding block is prevented from being locked in work.

Furthermore, the slotted hole at the tail part of the upper platform is inclined, so that the pulling force of the upper platform on the front upright post during lifting is reduced.

Compared with the prior art, the invention has the beneficial effects that: in the lifting process, the angle with larger stress can not appear, the lifting process is stable, and the speed can not generate sudden change. In the lifting process, the pulling force of the upper platform on the front upright post is reduced, the front upright post cannot generate large deformation and displacement, the lifting efficiency of the lifting system is improved, the lifting action stability is stable, and the lifting device is convenient to install and high in safety.

Drawings

FIG. 1 is a front view of the hydraulic lifting mechanism of the present invention; FIG. 2 is a partial half-sectional view of a slider and an inner track of an upper platen; FIG. 3 is a schematic view of a safety arm; a chassis in the figures; 2, a hydraulic cylinder; 3, a safety arm; 4 lifting the long arm; 5, a sliding block; 6 lifting the short arm; 7, an upper platform; 8, a slide block guide rail; 31 a safety sleeve arm; 32 telescoping arms.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in the attached figure 1, the utility model discloses a hydraulic lifting mechanism, including chassis 1, pneumatic cylinder 2, safety arm 3, lift long arm 4, slider 5, lift short arm 6, upper platform 7, slider guide rail 8. The tail part of the hydraulic cylinder 2, the lower end of the safety arm 3 and the lower end of the lifting long arm 4 are fixed on the chassis through pin shafts. The piston rod of the hydraulic cylinder 2 and the upper end of the safety arm 3 are connected with the lifting long arm 4 through a pin shaft, the upper end of the supporting long arm 4 is connected with the sliding block 5 through a pin shaft, and the sliding block 5 is positioned in a sliding block guide rail 8 of the upper platform 7. As shown in fig. 2, the working surface of the slide block contacting the guide rail is made into a slope, so that the slide block 5 is stressed to facilitate the lifting of the upper platform 7. The one end of lifting short arm 6 is articulated with lifting long arm 4 through the round pin axle, and the other end can freely slide in the slope notch of upper mounting plate 7, plays the effect of auxiliary stay to the length of lifting short arm 6 is close with the distance of lifting long arm and lifting short arm pin joint to lifting long arm slider pin joint, can prevent the interference of long arm short arm at the in-process of lifting like this. As shown in fig. 3, the safety arm 3 is composed of a safety sleeve arm 31, a telescopic arm 32 and a safety pin 33, the telescopic arm 32 is freely telescopic in the

safety sleeve arm

31, 8 holes are formed in the telescopic arm 32, the telescopic arm and the telescopic arm can be matched to realize that the upper platform 7 is lifted and fixed at 8 positions, the requirement of transporting most cars can be met, in addition, the number and the positions of the holes in the safety arm 3 can be processed according to the requirement, so that the car transporting vehicle is lifted and fixed to any position, and the universalization is realized.

The specific working process is as follows:

when the upper platform 7 needs to be lifted, the hydraulic cylinder 2 extends to drive the lifting long arm 4 to swing upwards around a hinged point of the lower end of the lifting long arm 4 and the chassis 1, the lifting long arm 4 rotates and drives the sliding block 5 to move backwards in the sliding block guide rail 8 of the upper platform 7, the sliding block 5 jacks the upper platform 7, the lifting work is mainly completed by the lifting long arm 4, and the lifting short arm 6 is mainly responsible for the auxiliary supporting work in the later period. One end of the short lifting arm 6 is located on the outermost side of a notch of the upper platform 7 at the beginning, moves forwards in a slotted hole along with the swinging of the long lifting arm 4, the upper platform 7 is lifted under the action of the two lifting arms, a proper lifting height is selected according to the height of an actual carrying car, the safety arm 3 swings around a hinged point of the safety sleeve arm 31 and the chassis 1 under the driving of the long lifting arm 4, the telescopic arm 32 extends out of the safety sleeve arm 31, after the upper platform 7 is lifted to the proper height, the safety pin 33 is inserted into the safety arm 3 to fix the length of the safety arm, the safety arm 3 plays a role in protecting the supporting hydraulic cylinder 2, and the long lifting arm 4 is supported to ensure that the upper platform 7 is kept in the proper position to be motionless.

When the ascending platform 7 needs to descend, the hydraulic cylinder 2 contracts to drive the lifting long arm 4 to rotate downwards around a hinged point of the lower end of the lifting long arm 4 and the chassis 1, the lifting long arm 4 rotates to drive the sliding block 5 to move forwards in the sliding block track 8 of the ascending platform 7, one end of the lifting short arm 6 moves outwards from the innermost side of the notch of the ascending platform 7, and the ascending platform 7 descends under the action of the two lifting arms until descending to the lowest position.

The technical scheme improves the safety and the reliability of the lift mechanism of the car transport vehicle, can realize the stop at any height in the lift process, has stable lift action and high lift efficiency, and effectively prevents the occurrence of safety accidents.

Claims

1. The utility model provides a sedan-chair fortune car hydraulic pressure lifting mechanism, includes chassis (1), hydraulic cylinder (2), safety arm (3), lifts long arm (4), slider (5), lifts short arm (6), upper mounting plate (7), slider guide rail (8), its characterized in that: the bottom of the lifting mechanism is fixed with the chassis (1) in a pin shaft connection mode, the lifting long arm (4) is connected with an inclined track on the upper platform (7) through a sliding block (5), and two ends of the lifting short arm (6) are connected with the lifting long arm (4) and an inclined groove hole of the upper platform (7) through pin shafts respectively.

2. The hydraulic lifting mechanism of the car carrier as claimed in claim 1, characterized in that the distance from the hinged point of the long lifting arm (4) and the short lifting arm (6) to the center of mass of the slide block (5) is approximately equal to the length of the hinged point of the short lifting arm (6) and the slotted hole of the upper platform (7).

3. The hydraulic lifting mechanism of the car carrier as claimed in claim 1, wherein the working surface of the sliding block (5) contacting the upper platform (7) is at an angle to the horizontal plane, and the working surface is an inclined surface.

4. The hydraulic lifting mechanism of a car carrier as claimed in claim 1, characterized in that the slotted holes of the upper platform (7) are inclined slotted holes.

5. The hydraulic lift mechanism of claim 1, wherein the safety arm comprises a safety sleeve arm (31), a telescopic arm (32) and a safety pin (33), the telescopic arm (32) can be telescopic in the safety sleeve arm (31), and the telescopic arm (32) is provided with 8 holes for inserting the safety pin (33).