Manual stacker hydraulic safety system

Abstract

The invention discloses a hydraulic safety system for a manual fork truck. A pressure compensation speed governing assembly is arranged. The hydraulic safety system for the manual fork truck comprises a manual pump, an oil chamber and an ejector assembly, and also comprises the pressure compensation speed governing assembly used for preventing the occurrence of an accident to instantaneously fall, a manual operation reversing assembly which is provided with a locking function and is used for adjusting the liquid flow direction to change the working state of the system and an overflow assembly used for preventing overload; the pressure compensation speed governing assembly is respectively communicated with the ejector assembly and the manual operation reversing assembly; the manual pump is respectively communicated with the manual operation reversing assembly and the overflow assembly; the overflow assembly is communicated with the manual operation reversing assembly. The hydraulic safety system for the manual fork truck has the effects of automatically limiting speed and flow, the descent speed is automatically limited to a set value, even if misoperation carelessly happens, an oil cylinder cannot drop rapidly, the slow descent effect is realized, and the system is safe; due to the adoption of the manual operation reversing assembly, the descent speed is controllable, the flow of a cone-shaped one-way valve can be manually controlled, and the aim of controllable speed is achieved; the design of the overflow assembly is capable of preventing overload, a vehicle is prevented from being damaged under the overload, and the service life of the device is ensured. The hydraulic safety system for the manual fork truck belongs to the technical field of mechanical equipment.

Description

technical field [0001] The invention belongs to the technical field of manual hydraulic stacker, also known as manual hydraulic stacker, or manual hydraulic pallet stacker, also called manual forklift, commonly known as manual stacker, especially related to such manual stacker Core hydraulic system safety technology. Background technique [0002] The manual stacker is powered by manpower and has the functions of lifting, stacking and short-distance transportation. It is a non-motorized industrial vehicle. Its lifting work is mainly completed by manpower driving the hydraulic lifting device. Similar to a hydraulic jack, the hydraulic device is generally composed of a fuel tank, a pump, a valve, and an oil cylinder. The working principle of the pump is: the pump rod is pressed down by hand or pedal, and the pump rod returns to the spring, and the pump rod reciprocates once. This is the hydraulic pressure source of the hydraulic system. If the valve stem of the control valve i...

AI Technical Summary

Problems solved by technology

[0006] But above-mentioned a kind of speed limiting valve and forklift safety speed limiting valve have 4 weak points altogether: 1, need the one-way valve of one group of bypass, so that forward oil fluid can flow normally, backflow oil fluid can be absorbed Cut off, and then set up an oil circuit for the throttle valve; 2. The structure is complex, the number of parts is large, and it is easy to break down; 3. It must be external, so that it is suitable for pipeline connection, and it also occupies a limited amount of vehicles. 4. Forklifts are motorized industrial vehicles, and their hydraulic pressure source is provided by the power system. Therefore, this type of technology is not suitable for non-motorized industrial vehicles, let alone the hydraulic system of manual stackers.

[0007] To sum up, the existing technology is still unable to achieve a compact structure and prevent accidental falls; the existing technology is also prone to mistaken overloading and easy damage to the device

Images