Mechanical hydraulic trailer brake system for a motor home

Abstract

The application belongs to the field of trailer house car braking, in particular to a mechanical hydraulic trailer house car braking system, which comprises a shell and an end cover, a first cavity and a second cavity are arranged in the shell, the first cavity is arranged at the top of the shell, a brake oil pot is arranged in the first cavity, an oil tank cover is arranged at the top of the brake oil pot, a motor is arranged in the second cavity, a plunger pump is arranged on one side of the motor, a pressure sensor is arranged above the motor, an electromagnetic valve is arranged above the pressure sensor, all parts are integrated in one shell, the overall structure is simple and solid, suitable for working in various environments, low cost, easy to install, strong braking capacity, can provide a maximum braking pressure of 11MPa, far higher than the braking capacity of electromagnetic brake, and synchronous braking, no longer the situation of house car pushing the front car when braking, effectively improving the stability and safety of the vehicle.

Description

Technical Field

[0001] The invention belongs to the field of trailer-type caravan braking, and in particular relates to a mechanical hydraulic trailer-type caravan braking system. Background Art

[0002] Currently, there are two major braking systems for trailer RVs worldwide: electromagnetic brakes, led by the United States, and overrun brakes, primarily by Germany. Overrun brakes have a braking threshold, slow response, and are low-cost, making them suitable only for lightweight RVs. Electromagnetic brakes are characterized by rapid response, often faster than the vehicle in front. This generally causes the RV to brake first, which accelerates braking for the towing vehicle and significantly reduces stopping distance compared to overrun brakes. Electromagnetic brakes have a braking force of only 0 to 2g. As living standards improve, the interior design and accessories of trailer RVs continue to be upgraded and improved, and the weight of RVs continues to increase. The braking capacity of existing electromagnetic brakes is no longer sufficient to completely stop RVs. Braking for RVs involves the driver's life, making braking capacity particularly important. Existing brake systems are bulky and pose certain safety risks. Some inertia braking systems still experience the possibility of the rear vehicle pushing the leading vehicle during braking. Furthermore, these systems require complex equipment such as hydraulic cylinders, posing high requirements for installation and maintenance. Summary of the Invention

[0003] The object of the present invention is to provide a mechanical hydraulic trailer type recreational vehicle braking system.

[0004] The technical solutions adopted in the present invention are as follows:

[0005] A mechanical hydraulic trailer RV braking system includes a shell and an end cover. A first cavity and a second cavity are provided inside the shell. The first cavity is provided at the top of the shell. A brake oil pot is provided inside the first cavity. A tank cap is provided on the top of the brake oil pot. A motor is provided inside the second cavity. A plunger pump is provided on one side of the motor. A pressure sensor is provided above the motor. A solenoid valve is provided above the pressure sensor. An oil return pipe and an oil suction pipe are provided inside the end cover, and a filter is provided inside the oil suction pipe.

[0006] Preferably, a sealing gasket is provided at the connection between the shell and the end cover, and the shell and the end cover are connected by bolts.

[0007] This arrangement prevents brake fluid leakage and facilitates installation and disassembly.

[0008] Preferably, the oil suction pipe is arranged at the bottom of the brake oil tank, the bottom end of the oil suction pipe is connected to the oil inlet of the plunger pump, and the oil return pipe is connected to the oil outlet of the plunger pump.

[0009] This setting makes the design more reasonable.

[0010] Preferably, the oil return pipe is communicated with the solenoid valve, and the pressure sensor is communicated with the oil return pipe.

[0011] This setting makes the design more reasonable and reduces complex piping.

[0012] Working principle: When the RV has a braking demand, the control panel receives a signal, the motor is powered on and runs, and high-pressure brake fluid is provided to the brake line through the plunger pump. At this time, the solenoid valve is normally open and the system does not build pressure. When the front vehicle steps on the brake device, the control panel receives a signal, the solenoid valve closes, the system builds pressure, and provides braking pressure for the brake caliper of the towed vehicle; when the braking is completed, the brake device is released, the control panel receives a signal, the solenoid valve opens, the pressure is released back to the brake oil tank, the system pressure returns to normal pressure, and the brake is released; the pressure sensor set at the outlet of the plunger pump pipeline is used to monitor the brake pressure to form a closed-loop control.

[0013] The beneficial effects of the present invention are: all components are integrated in one shell, the overall structure is simple and strong, suitable for working in various environments, low cost, easy to install, strong braking ability, and can provide a maximum braking pressure of 11MPa, which is far higher than the braking capacity of electromagnetic brakes, and synchronous braking, and the situation where the RV pushes the front vehicle when braking will no longer occur, effectively improving the stability and safety of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the mechanical hydraulic trailer type RV braking system of the present invention;

[0016] Figure 2 is a cross-sectional view of the housing structure of the mechanical hydraulic trailer-type RV brake system of the present invention;

[0017] Figure 3 It is a three-dimensional schematic diagram of the housing and end covers of the mechanical hydraulic trailer RV brake system of the present invention;

[0018] Figure 4 This is a wireframe diagram of the end cover of the mechanical hydraulic trailer-type recreational vehicle braking system according to the present invention.

[0019] The following are the descriptions of the reference numerals:

[0020] 1. Housing; 2. End cover; 3. Brake oil tank; 4. Fuel tank cap; 5. Oil suction pipe; 6. Filter; 7. Oil return pipe; 8. Solenoid valve; 9. Pressure sensor; 10. Motor; 11. Plunger pump; 12. First cavity; 13. Second cavity; 14. Braking device; 15. Control panel. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0022] The present invention is further described below by way of examples with reference to the accompanying drawings.

[0023] Example

[0024] like Figure 1-Figure 3 As shown, the mechanical hydraulic trailer RV braking system includes a shell 1 and an end cover 2. A first cavity 12 and a second cavity 13 are provided inside the shell 1. The first cavity 12 is provided at the top of the shell 1. A brake oil pot 3 is provided in the first cavity 12. A tank cap 4 is provided on the top of the brake oil pot 3. A motor 10 is provided inside the second cavity 13. A plunger pump 11 is provided on one side of the motor 10. A pressure sensor 9 is provided above the motor 10. A solenoid valve 8 is provided above the pressure sensor 9. An oil return pipe 7 and an oil suction pipe 5 are provided inside the end cover 2. A filter 6 is provided inside the oil suction pipe 5.

[0025] Preferably: a sealing gasket is provided at the connection between the shell 1 and the end cover 2, and the shell 1 and the end cover 2 are connected by bolts; the oil suction pipe 5 is provided at the bottom of the brake oil tank 3, the bottom end of the oil suction pipe 5 is connected to the oil inlet of the plunger pump 11, and the oil return pipe 7 is connected to the oil outlet of the plunger pump 11; the oil return pipe 7 is connected to the solenoid valve 8, and the pressure sensor 9 is connected to the oil return pipe 7.

[0026] Working principle: When the RV has a braking demand, the control panel 15 receives a signal, the motor 10 is powered on and runs, and high-pressure brake fluid is provided to the brake line through the plunger pump 11. At this time, the solenoid valve 8 is normally open and the system does not build pressure. When the front vehicle steps on the brake device 14, the control panel 15 receives a signal, the solenoid valve 8 closes, the system builds pressure, and provides braking pressure for the brake caliper of the towed vehicle; when the braking is completed, the brake device 14 is released, the control panel 15 receives a signal, the solenoid valve 8 opens, the pressure is released back to the brake oil tank 3, the system pressure returns to normal pressure, and the brake is released; the pressure sensor 9 set at the outlet position of the plunger pump 11 pipeline is used to monitor the brake pressure to form a closed-loop control.

[0027] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. Mechanical hydraulic trailer RV braking system, characterized by: The invention comprises a shell (1) and an end cover (2); a first cavity (12) and a second cavity (13) are provided inside the shell (1); the first cavity (12) is provided at the top of the shell (1); a brake oil pot (3) is provided inside the first cavity (12); a fuel tank cover (4) is provided on the top of the brake oil pot (3); a motor (10) is provided inside the second cavity (13); a plunger pump (11) is provided on one side of the motor (10); a pressure sensor (9) is provided above the motor (10); the pressure sensor (9) is provided with a solenoid valve (8) above; an oil return pipe (7) and an oil suction pipe (5) are provided inside the end cover (2), and a filter (6) is provided inside the oil suction pipe (5); the oil suction pipe (5) is provided at the bottom of the brake oil pot (3), the bottom end of the oil suction pipe (5) is connected to the oil inlet of the plunger pump (11), and the oil return pipe (7) is connected to the oil outlet of the plunger pump (11); the oil return pipe (7) is connected to the solenoid valve (8), and the pressure sensor (9) is connected to the oil return pipe (7); When the RV has a braking demand, the control panel (15) receives a signal, the motor (10) is powered on and runs, and high-pressure brake fluid is provided to the brake pipeline through the plunger pump (11). At this time, the solenoid valve (8) is in a normally open state, and the system does not build pressure. When the front vehicle steps on the brake device (14), the control panel (15) receives a signal, the solenoid valve (8) is closed, the system builds pressure, and provides braking pressure for the brake caliper of the towed vehicle; when the braking is completed, the brake device (14) is released, the control panel (15) receives a signal, the solenoid valve (8) opens, the pressure is discharged back to the brake oil tank (3), the system pressure returns to normal pressure, and the brake is released; the pressure sensor (9) provided at the outlet position of the pipeline of the plunger pump (11) is used to monitor the braking pressure to form a closed-loop control.

2. The mechanical hydraulic trailer type RV braking system according to claim 1, characterized in that: A sealing gasket is provided at the connection between the shell (1) and the end cover (2), and the shell (1) and the end cover (2) are connected by bolts.

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