CN219687294U - Electrohydraulic braking device for special vehicle - Google Patents

Electrohydraulic braking device for special vehicle Download PDF

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Publication number
CN219687294U
CN219687294U CN202320830332.7U CN202320830332U CN219687294U CN 219687294 U CN219687294 U CN 219687294U CN 202320830332 U CN202320830332 U CN 202320830332U CN 219687294 U CN219687294 U CN 219687294U
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China
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accumulator
pressure
oil
gear pump
energy accumulator
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CN202320830332.7U
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Chinese (zh)
Inventor
张红军
王健
崔书豪
李瑞鹏
卞亚峰
田华良
刘剑
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Zhengzhou New Dafang Heavy Industries and Technology Co Ltd
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Zhengzhou New Dafang Heavy Industries and Technology Co Ltd
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Abstract

The utility model relates to an electrohydraulic braking device for a special vehicle, which is matched with a braking axle in the vehicle to use, and comprises an oil pump motor element, an energy accumulator, a control element and a pipeline system, wherein the oil pump motor element is communicated with the energy accumulator, an outlet of the energy accumulator is connected with the pipeline system, and the pipeline system is connected with the braking axle; a pressure limiting valve group is arranged between the oil pump motor element and the energy accumulator and used for ensuring the stability of the hydraulic pressure of the system; the outlet of the accumulator is also respectively provided with a detection element and a control element, wherein the detection element is used for always keeping the pressure in the accumulator within a set range value, and the control element is used for starting and closing the brake axle. The utility model can be used for not only new vehicles, but also old vehicles, and when the old vehicles are changed, the device is only matched with a brake axle in the vehicles, and an energy accumulator is arranged in the device for temporarily storing hydraulic oil, so that frequent starting of an oil pump motor element is avoided, and energy consumption is reduced.

Description

Electrohydraulic braking device for special vehicle
Technical Field
The utility model relates to a braking device, in particular to an electrohydraulic braking device for special vehicles.
Background
In the field of special transportation vehicles, vehicles with power driving devices are provided with pneumatic braking systems, and a driver can brake the vehicles by operating pedals or handles; the transportation full trailer or some special vehicles do not have an active braking device, mainly depend on a tractor to provide a braking power source for the vehicle and complete braking operation, and have the advantages that corresponding air source and electric system interfaces are reserved on the vehicle and the tractor, so that delay exists when the vehicle with longer vehicle bodies is braked, and the braking requirement of the vehicle cannot be met; the air brake is not suitable for working conditions with lower environmental temperature, for example, the temperature is lower than-20 ℃, and elements and pipelines are easy to freeze, so that the reliability of the brake is affected; there are also special purpose vehicles in which the tractor cannot provide an air source (e.g., short range traction with a forklift), and the safety of cargo transportation cannot be satisfied. Although the braking function of the vehicle can be realized by adopting a collision brake or installing mechanical mechanisms such as a steel cable, a pulley and the like, the structure is complex, the braking force cannot be adjusted, the adaptability is poor, and the large-scale popularization cannot be realized.
Disclosure of Invention
Aiming at the problems existing in the prior art, the utility model provides the electrohydraulic braking device which has a simple structure and is suitable for modifying the old vehicle.
In order to solve the technical problems, the utility model adopts the following technical scheme:
an electrohydraulic braking device for special vehicles is matched with a braking axle in the vehicle and comprises an oil pump motor element, an energy accumulator, a control element and a pipeline system, wherein the oil pump motor element is communicated with the energy accumulator, an outlet of the energy accumulator is connected with the pipeline system, and the pipeline system is connected with the braking axle;
a pressure limiting valve group is arranged between the oil pump motor element and the energy accumulator and used for ensuring the stability of the hydraulic pressure of the system;
the outlet of the accumulator is also respectively provided with a detection element and a control element, wherein the detection element is used for always keeping the pressure in the accumulator within a set range value, and the control element is used for starting and closing the brake axle.
The oil pump motor element comprises a storage battery, a direct current motor and a gear pump, wherein the storage battery is connected with the direct current motor, the direct current motor is connected with the gear pump, the gear pump is communicated with an oil storage tank, and the output end of the gear pump is connected with the energy accumulator through a pressure limiting valve group.
The pressure limiting valve group comprises a one-way valve, and the one-way valve is arranged on a pipeline connected with the gear pump and the energy accumulator;
and an overflow valve and an electromagnetic load-discharging valve are respectively arranged on a pipeline between the one-way valve and the gear pump.
The detection element comprises an uplink pressure switch and a downlink pressure switch which are respectively arranged at the outlet of the energy accumulator.
The control element connected between the outlet of the energy accumulator and the pipeline system is a proportional electromagnetic valve which is also communicated with the oil storage tank and is electrically connected with an external control handle.
And the pressure gauge on the pipeline system is used for displaying the system pressure in real time.
The pipe system includes a hydraulic oil pipe.
The utility model has the beneficial effects that:
the utility model has simple structure, can be used for new vehicles and old vehicles, only needs to match the device with a brake axle in the vehicles when the old vehicles are changed, and is provided with an energy accumulator for temporarily storing hydraulic oil, thereby avoiding frequent starting of an oil pump motor element and reducing energy consumption.
Compared with mechanical collision brake, the control element adopts the proportional electromagnetic valve, and the size of an oil port in the proportional electromagnetic valve is adjusted through the control handle, so that the braking force is adjusted, and the braking effect is good.
Drawings
FIG. 1 is a schematic diagram of the hydraulic principle of the present utility model;
FIG. 2 is a schematic diagram of a front view structure of the present utility model;
fig. 3 is a schematic side view of the present utility model.
Detailed Description
The utility model will be further described with reference to the accompanying drawings
As shown in fig. 1-3, a novel electrohydraulic braking device for special vehicles is matched with a braking axle 14 in the vehicle and mainly comprises an oil pump motor element, an energy accumulator 6, a control element and a pipeline system, wherein the oil pump motor element is communicated with the energy accumulator 6, an outlet of the energy accumulator 6 is connected with the pipeline system, and the pipeline system is connected between the energy accumulator and the braking axle 14;
a pressure limiting valve group is arranged between the oil pump motor element and the energy accumulator 6 and used for ensuring the stability of the hydraulic pressure of the system;
the outlet of the accumulator 6 is also provided with a detection element for keeping the pressure in the accumulator 6 within a set range value at all times, and a control element for controlling the operating state of the brake axle 14, respectively.
In this embodiment, the oil pump motor element includes battery 1, direct current motor 2 and gear pump 3, and battery 1 connects direct current motor 2, and gear pump 3 is connected to direct current motor 2, and gear pump 3 communicates with the oil storage tank 4 that is equipped with, and the output of gear pump 3 is connected with energy storage ware 6 through the pressure limiting valve group. The storage battery 1 supplies power for the direct current motor 2, the direct current motor 2 drives the gear pump 3 to rotate, the gear pump 3 absorbs oil from the oil storage tank 4, and hydraulic oil is introduced into the energy accumulator 6 through the one-way valve 5 after the gear pump 3 absorbs oil.
In this embodiment, the pressure limiting valve set includes a check valve 5, and a check valve 5 is installed on a pipeline connected between the gear pump 3 and the accumulator 6, where the check valve 5 is used to prevent the hydraulic oil in the accumulator 6 from flowing backwards when the gear pump 3 stops running.
In this embodiment, the pipeline between the check valve 5 and the gear pump 3 is also provided with an overflow valve 7 and an electromagnetic relief valve 8, and the overflow valve 7 and the electromagnetic relief valve 8 are matched with the oil storage tank 4. Specifically, the overflow valve 7 is matched with the electromagnetic load-releasing valve 8, when the electromagnetic load-releasing valve 8 is electrified, the electromagnetic load-releasing valve 8 is communicated with the oil storage tank 4, so that the direct current motor 2 and the gear pump 3 can be started at low pressure, and the electricity consumption is low; after the direct current motor 2 and the gear pump 3 are started, the electromagnetic relief valve 8 is electrified, and the communication between the electromagnetic relief valve 8 and the oil storage tank 4 is cut off, so that the pipeline works normally. After the electromagnetic relief valve 8 is electrified, the overflow valve 7 is used for limiting the system pressure, and when the pressure exceeds a set value, hydraulic oil flows back to the oil storage tank 4 through the overflow valve 7, so that a safety protection effect is achieved.
In this embodiment the detection element comprises an upstream pressure switch 9 and a downstream pressure switch 10, respectively mounted at the outlet of the accumulator 6. The up pressure switch 9 and the down pressure switch 10 detect the outlet pressure of the accumulator 6, when the pressure is lower than the set value of the set lower limit pressure, the direct current motor 2 and the gear pump 3 are started to charge the accumulator 6, and when the pressure is higher than the set upper limit pressure, the operation of the direct current motor 2 and the gear pump 3 is stopped, and less system heats.
In the present embodiment, the control element mounted between the outlet of the accumulator 6 and the pipe system comprises a proportional solenoid valve 11, the proportional solenoid valve 11 cooperating with the tank 4. Specifically, a first oil port in the proportional solenoid valve 11 is communicated with the accumulator 6, a second oil port in the proportional solenoid valve 11 is communicated with the pipeline system, and a third oil port in the proportional solenoid valve 11 is communicated with the oil storage tank 4.
In this embodiment, the proportional solenoid valve 11 is also electrically connected to a control handle provided outside, and the proportional solenoid valve 11 controls the brake axle 14 to brake the vehicle.
In the embodiment, the requirements on the modified tractor are low, the control handle is placed on the tractor and fixed at a position which is convenient for a driver to operate, and the operation is simple.
In this embodiment, a pressure gauge 12 is provided on the piping system for displaying the system pressure in real time.
In the present embodiment, the pipe system comprises a hydraulic oil pipe for communication of the accumulator 6 with the brake axle 14.
The utility model is suitable for a vehicle, a brake drum is arranged on a brake axle 14 of the vehicle, a brake hydraulic cylinder is arranged in the brake drum, the brake is carried out by means of a spring, the oil supply is opened for braking, the oil break is carried out for braking, and the brake axle 14 is communicated with a second oil port of the proportional electromagnetic valve 11 through a pipeline system 13.
The working process comprises the following steps:
the accumulator 6 is charged: after the vehicle is electrified, when the downlink pressure switch 10 detects that the pressure of the energy accumulator 6 is low, the storage battery 1 supplies power to the direct current motor 2, the direct current motor 2 drives the gear pump 3 to rotate, after oil is absorbed from the oil storage tank 4, hydraulic oil enters the energy accumulator 6 through the one-way valve 5 to charge the energy accumulator 6, after the set pressure value is reached, the downlink pressure switch 9 controls the direct current motor 1 to stop working, the system keeps the set pressure, the overflow valve 7 is used for adjusting the pressure of the system, the electromagnetic relief valve 8 enables the direct current motor 2 and the gear pump 3 to start at low pressure, the consumed electric quantity is small, and the pressure gauge 12 displays the pressure of the system in real time.
The vehicle releases the brake: when the tractor driver releases the brake through the control handle, the proportional electromagnetic valve 11 is electrified to change the direction, hydraulic oil in the energy accumulator 6 enters into the brake oil cylinder in the brake axle 14 through the first oil port and the second oil port of the proportional electromagnetic valve 11 respectively, so that the brake oil cylinder stretches out, an internal spring is compressed, the brake hoop is driven to rotate reversely, the brake drum is released, and the braking function of the axle is released.
Vehicle braking: when a tractor driver operates the control handle, the proportional electromagnetic valve 11 gradually reduces current, part of hydraulic oil of the brake oil cylinder returns to the oil storage tank 4 through the second oil port and the third oil port of the proportional electromagnetic valve 11, the brake oil cylinder in the brake axle retracts under the action of spring force to drive the brake hoop to rotate, and the brake drum is held tightly, so that the brake axle is braked.
The magnitude of the current value introduced into the proportional solenoid valve 11 can be adjusted through the control handle, so that the magnitude of the oil port in the proportional solenoid valve 11 is adjusted, the braking force can be adjusted, and the braking effect is good.
In addition to the above embodiments, the present utility model also includes other embodiments, and by appropriate modification, the present utility model can be used for an axle for oil-feeding braking, and all technical solutions formed in a similar manner are within the scope of protection claimed by the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present utility model.
If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (8)

1. An electrohydraulic braking device for a special vehicle is matched with a braking axle in the vehicle and is characterized by comprising an oil pump motor element, an energy accumulator, a control element and a pipeline system, wherein the oil pump motor element is communicated with the energy accumulator, an outlet of the energy accumulator is connected with the pipeline system, and the pipeline system is connected with the braking axle;
a pressure limiting valve group is arranged between the oil pump motor element and the energy accumulator and used for ensuring the stability of the hydraulic pressure of the system;
the outlet of the accumulator is also respectively provided with a detection element and a control element, wherein the detection element is used for always keeping the pressure in the accumulator within a set range value, and the control element is used for starting and closing the brake axle.
2. The electrohydraulic brake device for special vehicles according to claim 1, wherein said oil pump motor element comprises a battery, a dc motor and a gear pump, the battery is connected to the dc motor, the dc motor is connected to the gear pump, the gear pump is connected to an oil storage tank, and the output end of the gear pump is connected to the accumulator via a pressure limiting valve group.
3. An electrohydraulic brake system for a special vehicle according to claim 1 or 2, wherein said pressure limiting valve assembly comprises a check valve, and wherein a check valve is mounted on a pipe connecting said gear pump to said accumulator.
4. An electrohydraulic brake system for a special vehicle according to claim 3, wherein a relief valve and an electromagnetic relief valve are further provided in the line between the check valve and the gear pump, respectively.
5. An electrohydraulic brake system for a special vehicle according to claim 4, wherein said sensing element includes an up pressure switch and a down pressure switch mounted at the outlet of the accumulator, respectively.
6. The electro-hydraulic brake system for a specialty vehicle of claim 5, wherein the control element connected between the outlet of the accumulator and the pipe system is a proportional solenoid valve that is also in communication with the reservoir tank, the proportional solenoid valve being electrically connected to an externally provided control handle.
7. An electro-hydraulic brake system for a specialty vehicle as set forth in claim 6, wherein said pressure gauge is provided on said piping system for displaying system pressure in real time.
8. An electro-hydraulic brake system for a specialty vehicle, as set forth in claim 7, wherein said conduit system includes hydraulic oil conduit.
CN202320830332.7U 2023-04-14 2023-04-14 Electrohydraulic braking device for special vehicle Active CN219687294U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320830332.7U CN219687294U (en) 2023-04-14 2023-04-14 Electrohydraulic braking device for special vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320830332.7U CN219687294U (en) 2023-04-14 2023-04-14 Electrohydraulic braking device for special vehicle

Publications (1)

Publication Number Publication Date
CN219687294U true CN219687294U (en) 2023-09-15

Family

ID=87965826

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320830332.7U Active CN219687294U (en) 2023-04-14 2023-04-14 Electrohydraulic braking device for special vehicle

Country Status (1)

Country Link
CN (1) CN219687294U (en)

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