A hand operated emergency walk system for a scissor lift platform
By adding an emergency power source and improving the hydraulic circuit on the scissor lift platform to form a closed-loop circuit, the problems of laborious and slow emergency walking systems were solved, achieving a labor-saving and high-speed, stable emergency walking effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XCMG FIRE FIGHTING SAFETY EQUIP CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-31
AI Technical Summary
The existing emergency walking system of scissor lift platforms is laborious and slow due to excessive load and insufficient hydraulic oil. Furthermore, the traditional design cannot achieve internal circulation of hydraulic oil, resulting in inconvenience in operation.
By adding an emergency power source and improving the hydraulic circuit, a system is designed that includes a brake, a brake release valve, a manual pump, a self-locking manual directional valve, a solenoid manual directional valve, a travel directional valve, a right drive motor, and a left drive motor, forming a closed-loop hydraulic circuit that allows the hydraulic oil to circulate internally and provide driving pressure.
It enables labor-saving, high-speed, and stable emergency walking by providing driving pressure to the motor through an emergency power source, reducing the need for manpower and improving the convenience and speed of emergency walking.
Smart Images
Figure CN224577943U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of scissor lift platforms, and in particular to a manual emergency walking system for scissor lift platforms. Background Technology
[0002] A scissor lift mobile work platform is a type of lifting equipment commonly used in warehouses, logistics facilities, construction sites, and other similar environments. It utilizes a hydraulic system to drive the scissor mechanism for lifting. During use, various electrical faults are inevitable, therefore, the platform's emergency response speed and ease of operation are of great concern to customers.
[0003] The emergency walking system of a scissor lift mobile work platform typically uses a manual brake release valve to release the hydraulic brake, and then the entire vehicle is moved manually. Traditional designs have the following drawbacks:
[0004] Difficult to drive: The emergency walking power source is entirely provided by human effort. Because the hydraulic motor requires 7 bar of internal pressure to operate hydraulically, and if the internal pressure is insufficient, an external torque of 100 Nm is needed for it to rotate. Therefore, during emergency walking, human effort must overcome not only the rolling resistance of the vehicle's own weight on the tires, but also the external driving torque of 100 Nm required when the hydraulic motor has no internal pressure. Due to the small tire radius, the total driving force required for emergency walking is large; it takes two adult men to push the entire machine with full force, making it extremely inconvenient to use.
[0005] Slow walking speed: Because the driving force required for emergency walking is large, the walking oil circuit inside the hydraulic valve is not a closed loop oil circuit. The hydraulic oil passing through the hydraulic motor will return to the oil tank through the return oil circuit, and the hydraulic oil cannot be circulated internally. There is no hydraulic oil replenishment during emergency walking, and the motor cannot be driven internally through the hydraulic system. Therefore, the emergency walking speed is very slow.
[0006] Because the existing emergency walking system only has a simple brake release device, when an emergency walking is needed, the vehicle can only be moved by human power. This requires overcoming not only the rolling friction of the wheels, but also the external driving torque of the hydraulic motor, which is extremely strenuous. At the same time, when the valve core is in the neutral position, the walking oil circuit goes directly to the oil tank through the return oil circuit. During the walking process, the hydraulic oil will return directly to the oil tank through the return oil circuit. There is no power source to replenish the oil in the oil inlet circuit, so the emergency walking speed is very slow.
[0007] Therefore, it is necessary to develop a new type of manual emergency walking system for scissor lift platforms to overcome the above problems. Utility Model Content
[0008] Purpose of the utility model: To address the shortcomings and defects of the existing technology, this utility model provides a manual emergency walking system for scissor lift platforms. By adding an emergency power source and improving the hydraulic circuit, it solves the problems of slow and laborious emergency walking caused by excessive load and insufficient hydraulic oil in the existing technology, extends the service life of hydraulic components, improves the speed and convenience of emergency walking, and enhances product competitiveness.
[0009] Technical Solution: This utility model discloses a manual emergency walking system for a scissor lift platform, characterized in that it includes a brake, a brake release valve, a manual pump, a self-locking manual directional valve, an electromagnetic manual directional valve, a walking directional valve, a right drive motor, and a left drive motor; the brake, brake release valve, manual pump, and self-locking manual directional valve are sequentially connected to the right drive motor and the left drive motor; the electromagnetic manual directional valve and self-locking manual directional valve are sequentially connected to the right drive motor and the left drive motor; and the walking directional valve is connected to the right drive motor and the left drive motor.
[0010] The travel reversing valve is connected to the oil pump.
[0011] The self-locking manual directional valve is connected to the manual pump.
[0012] The electromagnetic manual directional valve is connected to the manual pump.
[0013] The brake, brake release valve, manual pump, self-locking manual directional valve, electromagnetic manual directional valve, travel directional valve, right drive motor and left drive motor are located on the scissor lift platform.
[0014] Beneficial Effects: Compared with existing technologies, this utility model has the following significant advantages: This utility model pressurizes hydraulic oil using an emergency power source, providing pressurized oil to the hydraulic motor, and circulates the hydraulic oil internally through a closed-loop oil circuit, solving the problems of inconvenient and slow emergency travel. This utility model is labor-saving and convenient (emergency power source provides motor drive pressure): Utilizing an emergency power source to provide drive pressure to the travel motor eliminates the need for the motor to overcome an external drive torque of 100Nm, significantly saving manpower and making vehicle movement more convenient. This utility model offers high speed and stability (emergency travel closed-loop circuit): When emergency travel is required, the hydraulic oil circuit switches to a closed loop, and the hydraulic oil driving the motor circulates itself without returning to the oil tank, achieving efficient and stable emergency travel. Attached Figure Description
[0015] Figure 1 This is a structural diagram of an existing emergency walking system;
[0016] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 1 (Normal walking state);
[0017] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 (Emergency walking status);
[0018] Figure 4 This is a schematic diagram of the structure of the present invention. Figure 3 . Detailed Implementation
[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0020] This utility model discloses a manual emergency travel system for a scissor lift platform, comprising a brake, a brake release valve, a manual pump, a self-locking manual directional valve, an electromagnetic manual directional valve, a travel directional valve, a right drive motor, and a left drive motor; the brake, brake release valve, manual pump, and self-locking manual directional valve are sequentially connected to the right drive motor and the left drive motor; the electromagnetic manual directional valve and self-locking manual directional valve are sequentially connected to the right drive motor and the left drive motor; and the travel directional valve is connected to the right drive motor and the left drive motor.
[0021] The travel directional valve of this invention is connected to the oil pump. The self-locking manual directional valve is connected to the manual pump. The electromagnetic manual directional valve is also connected to the manual pump. The brake, brake release valve, manual pump, self-locking manual directional valve, electromagnetic manual directional valve, travel directional valve, right drive motor, and left drive motor are located on the scissor lift platform. Figure 4 The manual pump of this invention can be replaced with a battery pump.
[0022] like Figure 2 When the vehicle is in normal operation, the travel directional valve is energized and reversed. The high-pressure oil output by the oil pump passes through the travel directional valve from port P and enters the left and right drive motors to perform forward and backward travel. When the electromagnetic manual directional valve Y4 is energized and switched to the right position, the hydraulic oil flows to the manual pump through the self-locking manual directional valve and the electromagnetic manual directional valve. At the manual pump position, it is blocked by the check valve. At this time, the emergency travel oil circuit does not participate in the operation.
[0023] When the vehicle stops, the travel directional valve returns to the neutral position. If the motor continues to rotate, the hydraulic oil entering through port P can return directly to the oil tank through the M-type neutral position function of the travel directional valve. At this time, the electromagnetic manual directional valve Y4 is no longer energized and returns to the left position. The hydraulic oil in the motor circuit flows to port T to return to the oil tank through the self-locking manual directional valve and the electromagnetic manual directional valve, completing the unloading and reducing braking impact.
[0024] like Figure 3When a vehicle malfunctions and requires emergency movement, the travel directional valve is in the neutral position, and the oil circuit is closed. Manually switch the electromagnetic manual directional valve to the right position, and then switch the self-locking manual directional valve to the forward (left) or reverse (right) position according to the vehicle's forward or reverse needs. At this time, the travel system forms a closed-loop self-circulating system, and the internal hydraulic oil no longer returns to the oil tank. Then, by using a manual pump, hydraulic oil is input into the system. The pressurized oil will provide pressure to the drive motor in the corresponding direction according to the direction of the self-locking manual directional valve. When the internal drive pressure of the motor reaches 7 bar, emergency movement can be completed manually only by overcoming the rolling resistance of the entire machine.
[0025] like Figure 4 The manual pump is replaced with a battery pump, and the oil suction port is connected to the oil outlet of the hydraulic oil tank. The whole machine is equipped with an emergency power supply. When walking in an emergency, the electromagnetic manual directional valve does not need to be switched to the right position and can be kept in the left position. The self-locking manual directional valve is still used to control forward or backward movement, so that manual operation is no longer required. The emergency movement is achieved by supplying oil through the battery pump to form an open circuit.
[0026] This invention pressurizes hydraulic oil using an emergency power source to supply pressure to the hydraulic motor, and circulates the hydraulic oil internally through a closed-loop system, solving the problems of inconvenient and slow emergency travel. This invention is labor-saving and convenient (emergency power source provides motor drive pressure): Utilizing an emergency power source to provide drive pressure to the travel motor eliminates the need for the motor to overcome an external drive torque of 100Nm, significantly saving manpower and making vehicle movement more convenient. This invention offers high-speed and stable operation (emergency travel closed-loop circuit): When emergency travel is required, the hydraulic circuit switches to a closed loop, and the hydraulic oil driving the motor circulates itself without returning to the tank, achieving efficient and stable emergency travel.
Claims
1. A manual emergency walkaround system for a scissor lift platform, characterized by: It includes a brake, a brake release valve, a manual pump, a self-locking manual directional valve, a solenoid manual directional valve, a travel directional valve, a right drive motor, and a left drive motor; the brake, brake release valve, manual pump, and self-locking manual directional valve are sequentially connected to the right drive motor and the left drive motor; the solenoid manual directional valve and self-locking manual directional valve are sequentially connected to the right drive motor and the left drive motor; the travel directional valve is connected to the right drive motor and the left drive motor.
2. The manual emergency walk system for a scissor lift platform of claim 1, wherein: The travel reversing valve is connected to the oil pump.
3. The manual emergency walk system for a scissor lift platform of claim 1, wherein: The self-locking manual directional valve is connected to the manual pump.
4. The manual emergency walk system for a scissor lift platform of claim 1, wherein: The electromagnetic manual directional valve is connected to the manual pump.
5. The manual emergency walk system for a scissor lift platform of claim 1, wherein: The brake, brake release valve, manual pump, self-locking manual directional valve, electromagnetic manual directional valve, travel directional valve, right drive motor and left drive motor are located on the scissor lift platform.