Hydraulic clamping device with powerful self-locking function

Abstract

Disclosed is a hydraulic clamping device with a powerful self-locking function. The hydraulic clamping device comprises a base body. A cover body is arranged on the front end face of the base body. Guiding square holes are formed in the upper end and the lower end of one side wall of the base body. An oil cylinder is arranged in the base body in a suspended mode. Piston rods arranged symmetrically extend out from the upper end and the lower end of the oil cylinder respectively. The head of each piston rod is connected with a front connecting rod and a rear connecting rod through a piston rod pin shaft. The other end of each rear connecting rod is connected with a hinged support arranged on the inner wall of the base body through a hinged support pin shaft. The other end of each front connecting rod is connected with an inclined wedge sliding block through a sliding block pin shaft. Each inclined wedge sliding block is connected with an inclined wedge pressing block through a connecting spring in a matched mode. Each inclined wedge sliding block and the corresponding inclined wedge pressing block are installed in the corresponding guiding square hole together. The base body is provided with spring installation holes. Supporting springs are installed in the spring installation holes. Support sliding blocks are installed on the supporting springs. Each support sliding block is pressed on the top surface of the corresponding inclined wedge pressing block. The hydraulic clamping device has a dual mechanical self-locking function of inclined wedge self-locking and connecting rod self-locking, so that the hydraulic clamping device is stable and reliable, and capable of achieving self-locking clamping of clamping force which is greater than 100 tons.

Description

technical field [0001] The invention relates to the technical field of mechanical manufacturing, in particular to a hydraulic clamp with strong self-locking function. Background technique [0002] With the advancement of industrial automation technology, hydraulic clamping systems are used more and more. However, there are still some problems in engineering practice, which are mainly reflected in two aspects. On the one hand, it is the problem of maintaining pressure. It is very difficult to ensure that the hydraulic system is absolutely leak-free under the condition of long-term impact and heavy load. The way of the accumulator, but the accumulator is quite an elastic element. When the load exceeds the design load, the clamping system will give way, reducing the clamping rigidity and precision, and the system has no overload capacity. On the other hand, the force of the clamping element is unreasonable. The piston rod of the swing angle clamping cylinder is subject to bend...

AI Technical Summary

Problems solved by technology

However, there are still some problems in engineering practice, which are mainly reflected in two aspects. On the one hand, it is the problem of maintaining pressure. It is very difficult to ensure that the hydraulic system is absolutely leak-free under the condition of long-term impact and heavy load. The way of accumulator, but the accumulator is quite an elastic element, when the load exceeds the design load, the clamping system will give way, reducing the clamping rigidity and precision, and the system has no overload capacity

On the other hand, the force of the clamping element is unreasonable. The piston rod of the swing angle clamping cylinder is subject to bending moment in addition to the tensile force, which requires high strength and rigidity; the hinge support of the lever cylinder is subject to more than twice the pressure. Tension, etc.

In order to reduce the system's requirements for pressure maintenance, there are some self-locking oil cylinders, but some have low carrying capacity, and some self-locking oil circuit control is complicated

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