A forklift brake release system

Abstract

The utility model discloses a brake release system for a forklift truck, including an oil tank; a variable pump, whose oil suction port is connected to the oil tank; a displacement control module, which is connected to the variable pump and is used to control the displacement of the variable pump; a motor, whose high-pressure chamber is connected to the variable pump through a high-pressure oil pipeline, and whose low-pressure chamber is connected to the variable pump through a low-pressure oil pipeline; a brake release control valve, which is connected between the oil tank and the high-pressure oil pipeline and is used to control the pressure state of the motor; and a wireless control module, which is electrically connected to the brake release control valve and is used to control the opening or closing of the brake release control valve. The utility model adds a pipeline connected to the oil tank on the high-pressure oil pipeline of the motor, and sets a brake release control valve on the pipeline, and then uses a wireless control module to remotely control the opening and closing of the brake release control valve, so as to achieve the purpose of releasing the brake when a vehicle fails, so that the forklift truck with the failure can smoothly retreat when towing.

Description

Technical Field

[0001] The utility model relates to the technical field of brake devices, in particular to a brake release system for a forklift. Background Art

[0002] With the continuous development of the mining industry, electric mining shovels, as a new type of mining equipment, have been widely used in large-scale mining sites and geological environments requiring the excavation of large volumes of rock. Compared to traditional mechanical shovels, electric shovels are unaffected by oil, water, temperature, and other factors, offering stable power and higher efficiency. Furthermore, electric shovels use electricity, which is not only environmentally friendly and energy-saving, but also further ensures safety within the mine. However, when an electric shovel malfunctions and causes a power outage, it must be towed out of the mine for inspection. This power outage prevents the variable motor from properly depressurizing and releasing the brakes, making towing the shovel time-consuming and posing serious safety risks. Summary of the Invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems and provides a forklift brake release system, which can control the brake system to release when a vehicle breaks down, so as to tow the broken vehicle out in a short time.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A forklift brake release system includes an oil tank; a variable displacement pump, whose oil suction port is connected to the oil tank; a displacement control module, which is connected to the variable displacement pump and is used to control the displacement of the variable displacement pump; a motor, whose high-pressure chamber is connected to the variable displacement pump via a high-pressure oil pipeline, and whose low-pressure chamber is connected to the variable displacement pump via a low-pressure oil pipeline; a brake release control valve, which is connected between the oil tank and the high-pressure oil pipeline and is used to control the pressure state of the motor; and a wireless control module, which is electrically connected to the brake release control valve and is used to control the opening or closing of the brake release control valve.

[0006] As an improvement of the above technical solution, the brake release control valve includes a solenoid valve, a pressure relief oil pipeline is connected between the oil tank and the high-pressure oil pipeline, and the solenoid valve is connected to the pressure relief oil pipeline.

[0007] As an improvement of the above technical solution, the wireless control module includes a control signal transmitter, a wireless communication unit and a control unit. The control unit is electrically connected to the brake release control valve. The control signal transmitter can send a control signal to the controller through the wireless communication unit. The control unit can control the opening or closing of the brake release control valve according to the received control signal.

[0008] As an improvement to the above technical solution, the high-pressure oil pipeline is connected to a high-pressure control valve group, and the low-pressure oil pipeline is connected to a low-pressure control valve group.

[0009] As an improvement of the above technical solution, the high-pressure control valve group includes a first pressure limiting valve and a high-pressure overflow valve connected to the high-pressure oil pipeline, and the low-pressure control valve group includes a second pressure limiting valve and an oil replenishment one-way valve connected to the low-pressure oil pipeline.

[0010] As an improvement to the above technical solution, it further includes an oil replenishment pressure filter connected to the variable pump, and the oil replenishment one-way valve and the displacement control module are both connected to the oil replenishment pressure filter.

[0011] As an improvement of the above technical solution, a loop flushing valve is also included, which is provided with two groups of flushing oil ports. The two groups of flushing oil ports are respectively connected to the high-pressure oil pipeline and the low-pressure oil pipeline and are close to one end of the motor.

[0012] As an improvement to the above technical solution, the oil discharge ports of the variable pump and the motor are connected to the oil tank through a housing oil discharge pipeline.

[0013] As an improvement to the above technical solution, the end of the shell oil unloading pipeline close to the oil tank is connected to a radiator.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] The utility model relates to a brake release system for a forklift, which adds a pipeline connected to the oil tank on the high-pressure oil pipeline of the motor, and sets a brake release control valve on the pipeline. Then, a wireless control module is used to remotely control the opening and closing of the brake release control valve, thereby achieving the purpose of releasing the brakes when a vehicle malfunctions, so that the faulty forklift can smoothly retreat when towing, the motor can normally release pressure, and the unloaded oil can be led back into the oil tank through the pipeline of the brake release control valve without affecting the normal operation of the forklift. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a further detailed description of the specific embodiments of the present invention with reference to the accompanying drawings, wherein:

[0017] Figure 1 The structure of the system in the embodiment of the utility model is shown as follows Figure 1 ;

[0018] Figure 2 The structure of the system in the embodiment of the utility model is shown as follows Figure 2 . DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may also be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a central component. When a component is referred to as being "set in the middle", it does not only mean being set in the exact middle position, but also means being within the range defined by the middle as long as both ends are not set. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figures 1 to 2 As shown, the present invention provides a forklift brake release system, comprising an oil tank 10; a variable displacement pump 20, the oil suction port of which is connected to the oil tank 10; a displacement control module 30, which is connected to the variable displacement pump 20 and is used to control the displacement of the variable displacement pump 20; a motor 40, whose high-pressure chamber is connected to the variable displacement pump 20 via a high-pressure oil pipeline 41, and whose low-pressure chamber is connected to the variable displacement pump 20 via a low-pressure oil pipeline 42; a brake release control valve 50, which is connected between the oil tank 10 and the high-pressure oil pipeline 41 and is used to control the pressure state of the motor 40; and a wireless control module 60, which is electrically connected to the brake release control valve 50 and is used to control the opening or closing of the brake release control valve 50. Specifically, the motor 40 can be a variable bending axis motor; the variable displacement pump 20 can be an axial piston variable displacement pump; and the displacement control module 30 can be electronically controlled, i.e., EDC, which has precise operation and easy spatial arrangement. These are all prior arts and will not be described in detail in this application.

[0023] In a specific embodiment of the present application, the brake release control valve 50 includes a solenoid valve 51. A pressure relief oil line 52 is connected between the oil tank 10 and the high-pressure oil line 41. The solenoid valve 51 is connected to the pressure relief oil line 52. The solenoid valve 51 can be an existing manual electronically controlled integrated solenoid valve.

[0024] The wireless control module 60 includes a control signal transmitter, a wireless communication unit, and a control unit. The control unit is electrically connected to the brake release control valve 50. The control signal transmitter can send a control signal to the controller via the wireless communication unit, and the control unit can control the opening or closing of the brake release control valve 50 based on the received control signal. The control signal transmitter can be a wireless remote control, etc., and the wireless communication unit can use Bluetooth or WiFi communication. The control unit includes a processor and a controller, all of which are prior art and will not be described in detail in this application. However, if the vehicle malfunctions and the brakes cannot be released, the brakes can be released by remotely controlling the solenoid valve 51.

[0025] In actual application, the existing forklift's brake system oil circuit can be modified, that is, an oil pipe is installed at the system pressure measuring port of the variable motor, and the oil pipe is connected to the manual electronically controlled integrated solenoid valve. Then, an additional set of wireless signal devices is added to realize remote control of the solenoid valve. Its receiving frequency is different from the existing remote control in the mining area, and the leaked oil is led back to the travel hydraulic oil tank from the solenoid valve.

[0026] In the specific implementation of this application, to ensure normal system pressure, a high-pressure control valve assembly 70 is connected to the high-pressure oil line 41, and a low-pressure control valve assembly 80 is connected to the low-pressure oil line 42. Specifically, the high-pressure control valve assembly 70 includes a first pressure-limiting valve 71 and a high-pressure relief valve 72 connected to the high-pressure oil line 41, while the low-pressure control valve assembly 80 includes a second pressure-limiting valve 81 and a charge check valve 82 connected to the low-pressure oil line 42. The charge check valve 82 replenishes oil leaks from the hydraulic motor during operation, preventing cavitation and insufficient system pressure. When the oil pressure in the high-pressure area exceeds the system's maximum operating pressure, the high-pressure relief valve 72 automatically opens, allowing oil to flow from the high-pressure area to the low-pressure area. The valve cannot open in the reverse direction, ensuring stable operation of the entire system and protecting all components. Furthermore, a charge pressure filter is included, connected to the variable pump 20. Both the charge check valve 72 and the displacement control module 30 are connected to the charge pressure filter. The oil replenishment pressure filter is used to remove impurities in the hydraulic oil and has a pressure detection function.

[0027] In the specific embodiment of the present application, a loop flushing valve 43 is further included. The loop flushing valve 43 is provided with two sets of flushing oil ports, which are respectively connected to the high-pressure oil pipeline 41 and the low-pressure oil pipeline 42 at one end close to the motor 40. The loop flushing valve 43 is used to draw a portion of the oil from the circuit for cooling. The oil flowing out of the loop flushing valve 43 passes through the housing of the motor 40 and cools the motor 40.

[0028] To facilitate oil recovery, the housing oil discharge ports of the variable pump 20 and the motor 40 are connected to the oil tank 10 through a housing oil discharge pipeline 90. Furthermore, the housing oil discharge pipeline 90 is connected to a radiator 11 at one end close to the oil tank 10 to cool the discharged oil.

[0029] The utility model provides a brake release system for a forklift, which can release the brakes when a vehicle malfunctions by adding a pipeline connected to the oil tank to the high-pressure oil pipeline 41 of the motor 40, and arranging a brake release control valve 50 on the pipeline. Then, a wireless control module 60 is used to remotely control the opening and closing of the brake release control valve 50. This system can achieve the purpose of releasing the brakes when a vehicle malfunctions, so that the faulty forklift can smoothly retreat when towing, the motor 40 can normally release pressure, and the unloaded oil can be led back into the oil tank through the pipeline of the brake release control valve 50 without affecting the normal operation of the forklift.

[0030] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be included in the scope of the technical solution of the present invention.

Claims

1. A forklift brake release system, characterized in that: include tank; A variable displacement pump, the oil suction port of which is connected to the oil tank; A displacement control module, which is connected to the variable displacement pump and is used to control the displacement of the variable displacement pump; A motor, wherein the high-pressure chamber thereof is connected to the variable pump via a high-pressure oil pipeline, and the low-pressure chamber thereof is connected to the variable pump via a low-pressure oil pipeline; A brake release control valve is connected between the oil tank and the high-pressure oil pipeline and is used to control the pressure state of the motor; a wireless control module is electrically connected to the brake release control valve and is used to control the opening or closing of the brake release control valve.

2. A forklift brake release system according to claim 1, characterized in that: The brake release control valve comprises a solenoid valve, a pressure relief oil pipeline is connected between the oil tank and the high-pressure oil pipeline, and the solenoid valve is connected to the pressure relief oil pipeline.

3. A forklift brake release system according to claim 1, characterized in that: The wireless control module includes a control signal transmitter, a wireless communication unit and a control unit. The control unit is electrically connected to the brake release control valve. The control signal transmitter can send a control signal to the controller via the wireless communication unit. The control unit can control the opening or closing of the brake release control valve according to the received control signal.

4. A forklift brake release system according to claim 1, characterized in that: The high-pressure oil pipeline is connected with a high-pressure control valve group, and the low-pressure oil pipeline is connected with a low-pressure control valve group.

5. A forklift brake release system according to claim 4, characterized in that: The high-pressure control valve group includes a first pressure limiting valve and a high-pressure relief valve connected to a high-pressure oil pipeline, and the low-pressure control valve group includes a second pressure limiting valve and an oil replenishment check valve connected to a low-pressure oil pipeline.

6. A forklift brake release system according to claim 5, characterized in that: It also includes an oil replenishment pressure filter connected to the variable pump, and the oil replenishment check valve and the displacement control module are both connected to the oil replenishment pressure filter.

7. A forklift brake release system according to claim 1, characterized in that: It also includes a loop flushing valve, which is provided with two groups of flushing oil ports. The two groups of flushing oil ports are respectively connected to the high-pressure oil pipeline and the low-pressure oil pipeline and are close to one end of the motor.

8. A forklift brake release system according to claim 1, characterized in that: The oil discharge ports of the variable displacement pump and the motor are connected to the oil tank through the oil discharge pipeline of the housing.

9. A forklift brake release system according to claim 8, characterized in that: One end of the shell oil unloading pipeline close to the oil tank is connected with a radiator.

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