CN203974934U - Heavier-duty automobile hydraulic power-assisted steering device - Google Patents

Abstract

The utility model discloses a reinforced automobile hydraulic steering assist device, which belongs to the technical field of automobile hydraulic steering assist devices. It mainly solves the problem of insufficient power of the automobile hydraulic steering assist system. The utility model includes a steering wheel and a hydraulic steering booster. The hydraulic steering booster includes a steering control valve, a steering oil tank and a steering power cylinder. A reinforced oil pipe is installed between the steering oil tank and the oil inlet pipe, and a booster gear pump is installed on the reinforced oil pipe. The booster gear pump uses the air pump on the car as the power source, and the enhanced oil pipe is also equipped with an overflow oil return pipe and a booster overflow valve, and a check valve is installed at the junction of the enhanced oil pipe and the oil inlet pipe. The utility model can generate enough oil pressure to make the power steering device play a full role, save the steering effort of the steering wheel, reduce the driver's burden, and improve driving safety.

Description

Reinforced Automobile Hydraulic Power Steering Device

technical field

The utility model relates to a hydraulic steering assist device matched with a mechanical steering gear of an automobile, which belongs to the technical field of automobile hydraulic steering assist devices.

Background technique

The steering of early cars did not have any power assist device, and it relied entirely on the driver's physical strength as the power source for steering. In fact, we can now see models without any power steering device. Drivers who have driven such a car will feel heavy on it. The steering wheel is very impressive. In order to reduce the driver's burden and also consider driving safety, the current car is also equipped with a power steering device. However, for trucks, buses, and some special vehicles, diesel engines are used. When the diesel engine is idling, the speed is relatively low, which often leads to insufficient oil supply to the steering oil pump, which makes the steering gear particularly heavy. It was very laborious. For example, when the vehicle is turning around and shifting, the steering wheel is particularly heavy, especially for some heavy-duty trucks, and the current power steering device cannot meet the needs of use.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the utility model provides a reinforced automobile hydraulic power steering device, which can generate enough oil pressure to make the power steering device fully play its role, save effort in steering the steering wheel, and reduce the driver's burden , Improve driving safety.

The utility model is realized through the following technical solutions: a reinforced automobile hydraulic steering assist device, which includes a steering wheel and a hydraulic steering assist device, the rotating shaft of the steering wheel is connected to a mechanical steering gear, and there is a steering rocker on the mechanical steering gear. The free end of the steering rocker arm is connected to the steering rod that controls the steering of the wheels; the hydraulic power steering device includes a steering control valve, a steering oil tank and a steering power cylinder, the steering control valve is connected to the rotating shaft of the steering wheel, and the steering control valve The oil inlet pipe and the oil return pipe are connected with the steering oil tank. The oil inlet pipe is equipped with a gear pump and an overflow valve. The oil outlet end of the gear pump forms a throttle port. The steering oil pipe is connected between the steering control valve and the steering power cylinder. Ⅰ and steering oil pipe II. There is a piston in the steering power cylinder. On the arm; between the steering oil tank and the oil inlet pipe, an enhanced oil pipe is installed, and a power booster gear pump is installed on the enhanced oil pipe. Oil pipe and power relief valve, a check valve is installed at the junction of the reinforced oil pipe and the oil inlet pipe.

The steering control valve is a slide valve, the slide valve has a valve body, and the slide valve is also equipped with a reaction valve and a return spring.

A one-way safety valve and an oil return one-way valve are installed between the oil inlet pipe and the oil return pipe.

The mechanical steering gear includes a steering screw that is coaxial with the shaft of the steering wheel. The steering screw is equipped with a steering nut that can move axially on the steering screw. The outside of the steering nut is made into a worm and meshed with an incomplete worm , the incomplete worm gear is coaxial with the steering rocker arm.

The beneficial effects of the utility model are: the utility model adds a set of booster oil circuit, uses the air pump of the automobile to drive the booster gear pump to work, enhances the oil pressure of the steering booster hydraulic system, and can generate enough oil pressure to make the steering booster The device fully exerts its function, saves effort in turning the steering wheel, reduces the driver's burden, improves driving safety, has a compact structure, and is convenient for popularization and implementation.

Description of drawings

Below according to accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the structural representation of the utility model.

In the figure, 1—assist relief valve; 2—assist gear pump; 3—steering oil tank; 4—one-way valve; 5—one-way safety valve; 6—overflow valve; 7—gear pump; 8—throttling 9—oil return check valve; 10—steering wheel; 11—steering control valve; 12—reaction valve; 13—valve body; 14—return spring; 15—steering screw; 16—steering nut; 17—steering rod ; 18—steering rocker arm; 19—piston; 20—steering power cylinder.

Detailed ways

A kind of reinforced automobile hydraulic steering assist device as shown in Fig. 1, it comprises steering wheel 10 and hydraulic steering assist device, and the rotating shaft of described steering wheel 10 is connected mechanical steering gear, and steering rocker arm 18 is arranged on mechanical steering gear, and steering rocker The free end of the arm 18 is connected to the steering rod 17 that controls the steering of the wheels; the hydraulic power steering device includes a steering control valve 11, a steering oil tank 3 and a steering power cylinder 20, and the steering control valve 11 is connected to the rotating shaft of the steering wheel 10 Above, the oil inlet pipe a and the oil return pipe b are connected between the steering control valve 11 and the steering oil tank 3, the oil inlet pipe a is equipped with a gear pump 7 and a relief valve 6, and the oil outlet end of the gear pump 7 forms a throttle port 8, so The steering oil pipe Ic and the steering oil pipe IId are connected between the steering control valve 11 and the steering power cylinder 20. There is a piston 19 in the steering power cylinder 20, and the steering oil pipe Ic and the steering oil pipe IId communicate with different chambers on both sides of the piston 19 respectively. , the piston rod on the piston 19 extends out of the steering power cylinder 20 and is hinged on the steering rocker arm 18; an enhanced oil pipe e is installed between the steering oil tank 3 and the oil inlet pipe a, and the enhanced oil pipe e is equipped with The booster gear pump 2, the booster gear pump 2 uses the air pump on the car as the power source, and the enhanced oil pipe e is also equipped with an overflow oil return pipe and a booster overflow valve 1, and the joint between the enhanced oil pipe e and the oil inlet pipe a is equipped with a single to valve 4.

The steering control valve 11 is a slide valve, the slide valve has a valve body 13, and a reaction valve 12 and a return spring 14 are also installed on the slide valve.

A one-way safety valve 5 and an oil return one-way valve 9 are installed between the oil inlet pipe a and the oil return pipe b.

Described mechanical steering gear comprises the coaxial steering screw 15 with the rotating shaft of described steering wheel 10, and the steering nut 16 that can move axially on the steering screw 15 is housed on the steering screw 15, and the steering nut 16 exterior is made into worm and Mesh connection is provided with incomplete worm gear, and incomplete worm gear is coaxial with described steering rocker arm 18.

The utility model adds a set of booster oil circuit, uses the air pump of the automobile to drive the booster gear pump to work, enhances the oil pressure of the steering booster hydraulic system, and can generate enough oil pressure to make the steering booster device fully play its role and make the steering wheel Steering is labor-saving and reduces the driver's burden. When the driver feels that turning the steering wheel is laborious, the air pump switch on the car can be turned on, and the air pump uses the high-pressure air in the air compressor and the high-pressure cylinder as the rotational kinetic energy to drive the power booster gear pump 2 to rotate. The hydraulic oil is sucked out from the steering oil tank 3 and pressurized by the booster gear oil pump 2. The hydraulic oil pressure generated by the booster gear oil pump 2 driven by the air pump is greater than that of the gear pump 7 driven by the engine. The high-pressure hydraulic oil pushes open the one-way valve 4, and delivers the high-pressure hydraulic oil to the oil passage of the steering control valve 11. At the same time, the gear pump 7 also delivers the pressurized hydraulic oil to the oil channel of the steering control valve 11 , and high-pressure hydraulic oil is generated in the steering control valve 11 . When the steering wheel 10 is turned, high-pressure hydraulic oil enters the steering power cylinder 20 through the oil inlet pipe a, and pushes the piston 19 to make a reciprocating linear motion. The piston drives the steering rocker arm 18 to swing left and right, and the steering rocker arm 18 drives the steering rod 17 to drive the wheels to rotate. , reducing the rotational force required to turn the steering wheel 10. When the vehicle is running normally, the driver can turn off the air pump switch, the air pump no longer rotates, the booster gear oil pump 2 no longer rotates, the hydraulic oil pressure in the pipeline drops, and the check valve 4 pops up to close the booster oil passage. At this time, the hydraulic oil pressure generated by the gear pump 7 driven by the high-speed operation of the engine can satisfy the driving force of the steering mechanism of the vehicle to control the wheels.

Claims (4)

1. A reinforced automobile hydraulic steering assist device, which includes a steering wheel (10) and a hydraulic steering assist device, the rotating shaft of the steering wheel (10) is connected to a mechanical steering gear, and there is a steering rocker arm (18) on the mechanical steering gear, The free end of the steering rocker arm (18) is connected to the steering rod (17) that controls the steering of the wheels; the hydraulic steering assist device includes a steering control valve (11), a steering oil tank (3) and a steering power cylinder (20). The steering control valve (11) described above is connected to the rotating shaft of the steering wheel (10), the oil inlet pipe (a) and the oil return pipe (b) are connected between the steering control valve (11) and the steering oil tank (3), and the oil inlet pipe (a ) is equipped with a gear pump (7) and a relief valve (6), the oil outlet of the gear pump (7) forms a throttling port (8), the steering control valve (11) and the steering power cylinder (20) Steering oil pipe I (c) and steering oil pipe II (d) are connected between them. There is a piston (19) inside the steering power cylinder (20). Steering oil pipe I (c) and steering oil pipe II (d) are respectively connected to The different chambers are connected, and the piston (19) has a piston rod extending out of the steering power cylinder (20) and is hinged on the steering rocker arm (18); it is characterized in that: in the steering oil tank (3 ) and the oil inlet pipe (a) are equipped with an enhanced oil pipe (e), and the enhanced oil pipe (e) is equipped with a booster gear pump (2). The overflow oil return pipe and booster relief valve (1) are also installed on the e), and the check valve (4) is installed at the junction of the enhanced oil pipe (e) and the oil inlet pipe (a). 2. The enhanced automobile hydraulic steering assist device according to claim 1, characterized in that: the steering control valve (11) is a slide valve, the slide valve has a valve body (13), and the slide valve is also equipped with a reaction valve. valve (12) and return spring (14). 3. The enhanced automobile hydraulic steering assist device according to claim 1, characterized in that: a one-way safety valve (5) and an oil return valve are installed between the oil inlet pipe (a) and the oil return pipe (b). to the valve (9). 4. The enhanced automobile hydraulic power steering device according to claim 1, characterized in that: the mechanical steering gear includes a steering screw (15) coaxial with the rotation axis of the steering wheel (10), and the steering screw ( 15) A steering nut (16) that can move axially on the steering screw (15) is installed on the top. The steering nut (16) is externally made into a worm and meshed with an incomplete worm gear. The incomplete worm gear is connected to the steering rocker arm (18) COAXIAL.