Good stability, reliability, uniform force of the
new hydraulic lift new hydraulic lift. H hydraulic. Hydraulic hydraulic lift is an ideal equipment for construction, maintenance, repair and other operations in electric power, communications, transportation, municipal, fire fighting, rescue and construction industries. With the vigorous development of our national economy, the demand for hydraulic lifts has risen rapidly. But the common hydraulic lift has many shortcomings, such as poor stability, reliability is not strong, uneven force and so on. In order to better serve our country's economic construction, and to improve the market competitiveness of the production enterprises, we design a new type hydraulic lifting platform with good stability, reliability and uniform force.
A theoretical model in order to analyze and find the original hydraulic lift in the structure of the deficiencies, it is necessary to establish a common hydraulic lift model, the dynamics analysis.
A simplified construction of a conventional hydraulic lift is shown.
The seat rail and the lower track move horizontally. Two points using the same support structure, the friction coefficient are / X, oc and bd rod length is 1, and the weight is negligible, hinge point e is located in the middle of the rod, fd for the hydraulic cylinder thrust line, the One end of the hinge with the oc at the f point, the other end hinged at d point, d line and the angle between the horizontal plane for the private angle between the rod and the horizontal plane a.Lift table and the workpiece containing the weight of the role of G its distance c It is obvious that the P value does not change during the lifting process.
Panoramic elevator Panoramic elevator
2 for the dynamic analysis of the model 2.1 to study the whole force of the elevator platform, such as, according to the force of the principle of equivalence, the G / 2 decomposition to bc ends, then :-), female, Hebei Shijiazhuang, Master, research direction: mechanical and electrical professional teaching and research.
Rbx, Rdx, Rby, R into the above equation, the solution from the above analysis for the general hydraulic lift table has the following conclusions: 1 The hinge for the study of the object value of the above into and sorted out: static: The force at the fulcrum (including the hydraulic cylinder thrust) is proportional to the load G; increase in the value of l to determine, these forces in turn proportional to the P value, while the Rcy, Rdy value increases with the a value decreases, 3) in the course of the work, the hinge fulcrum point of the force is changing, which makes the lift table stability is poor, reliability is not strong; 4 to calculate the hydraulic pressure Cylinder thrust T can be seen, the dynamic value than the static value of 2.3 to aec rod for the study object set hydraulic cylinder thrust Toec rod force case, the column balance equation: for the general lack of hydraulic lift, we propose a series of improvement measures, As shown.
The hydraulic lifting platform comprises a base, a lifting device, a hydraulic control system, a scissor support plate and a slide guide device.
As shown, a pin connection is used at the hinge of the support plate, and a needle bearing is provided between the pin and the support plate. In order to prevent the needle roller bearing from falling off, a retaining ring is provided at both ends thereof. This reduces body friction and improves flexibility at the hinges.
In order to improve the stability of the device, the connection between the base and the outer support plate using a slider rail device, its structure, such as the hydraulic. Hydraulic power. The guide rail is fixed on the base which is connected with the base, and the guide rail is provided with a slider which is slidingly connected with the guide rail.
1. Base 2. Slide rail 3. Hydraulic control 4. Lift 5. Pin connection 6. Scissor support Figure S Simplified schematic of the new hydraulic ram The slide rail consists of a special Structure, as shown. And the guide rail at the four sides are formed by the roller drum-shaped structure, rolling friction contact with the rail. In order to isolate the roller, a retainer is mounted on the roller. The two ends of the drum-shaped structure made up of rollers are respectively put into a mold frame made of special material and then the mold frame is embedded in the slide block. Using this structure can make the lifting platform in the course of work even if the hinge pivot point by the role of force will not make the table a greater vibration.
4 Conclusion This new type of hydraulic lift the stability of the body, by the special structure of the slide rail device is highly reliable, in the pin and the support plate into the needle bearing between the uniform force, in practice, very Good certification, and has successfully obtained the national patent license (Patent No .: ZL2009201037807, is a good prospect, with the promotion of the value of the hydraulic lift.
