CN202879478U - Hydraulic brake valve with pedal travel amplifying mechanism - Google Patents

Abstract

The utility model belongs to the technical field of braking maneuver devices in an underground coal mine anti-explosion rubber-tired vehicle and an engineering vehicle all hydraulic brake system, and particularly relates to a hydraulic brake valve with a pedal travel amplifying mechanism. The hydraulic brake valve comprises a pedal, a bottom plate and a valve body, and further comprises an idler wheel and a sleeve. The pedal and the bottom plate are connected through a rotating shaft in a hinged mode, the bottom plate is fixedly connected with the valve body, and the idler wheel is sleeved on a compression shaft and contacts the upper surface of the sleeve at the same time. A spring connected with a valve core inside the valve body is arranged inside the sleeve, the rotating shaft is provided with a torsion spring in a sleeved mode, one side of the torsion spring is sleeved on the compression shaft, and the other side of the torsion spring contacts the bottom surface of the pedal. The hydraulic brake valve has the advantages that on the premise of not changing pedal force basically, the rotation angle of the pedal is increased, pedal travel is amplified effectively, and meanwhile, the hydraulic brake valve is simple in structure, easy to achieve, reliable and durable in use.

Description

Hydraulic brake valve with the pedal stroke enlarger

Technical field

The utility model belongs to the technical field of the brake control device in the flame proof rubber tyre vehicle and engineering truck full power hydraulic brake system under the coal mine, is specifically related to a kind of hydraulic brake valve with the pedal stroke enlarger.

Background technology

The advantages such as full power hydraulic braking system is simple in structure with it, braking is reliable, dynamic response is fast are widely used in flame proof rubber tyre vehicle and engineering truck.Full power hydraulic braking system mainly comprises the key components such as Hydraulic Pump, Foot braking valve, prefill valve, energy storage, drg, principle of work be Hydraulic Pump by prefill valve to the energy storage topping up, make energy storage inner fluid pressure remain on certain limit, when vehicle need to be braked, by handling Foot braking valve, make the high pressure oil process Foot braking valve in the energy storage, to drg, implement braking with certain Output pressure.Because the particularity of hydraulic braking, the spool stroke of Foot braking valve is shorter for the stroke of general automobile braking master cylinder piston, caused the Foot braking valve pedal stroke short more a lot of than general automobile brake pedal stroke, during the brake driver braking, can not in time adjust according to the vehicle brake motoring condition, can make the steady stop motion of vehicle, produce easily brake phenomenon really up to the mark, vehicle moment is stopped, cause the frequent preshoot of driver.Simultaneously, so that the load of container the inside is frequently clashed into the container front portion, accelerated the damage of vehicle component and load.

Summary of the invention

Goal of the invention of the present utility model: in order to solve the vehicle brake braking problem really up to the mark that full power hydraulic braking system is housed, a kind of hydraulic brake valve with the pedal stroke enlarger is provided, be beneficial to the driver and control braking state, make the more hommization of brake operation of vehicle.

The utility model adopts following technical scheme to realize:

A kind of hydraulic brake valve with the pedal stroke enlarger, comprise pedal, base plate and valve body, it is characterized in that it also comprises roller and sleeve, described pedal is connected by the S. A. radial type with base plate, and base plate is captiveed joint with valve body, roller housing is on last item, roller contacts with the upper surface of sleeve simultaneously, and sleeve inner is provided with the spool that spring connects valve inner, sheathed torque spring on the S. A., torque spring one side is enclosed within on the last item, and opposite side contacts with the bottom surface of pedal.

The utility model has changed original pedal connection structure, dexterously torque spring is arranged between roller and the pedal, and the pedal anglec of rotation is increased, effectively amplified pedal stroke, simple in structure, be easy to realize, reliability and durability.

The relative prior art of the utility model has following beneficial effect: after pedal stroke obtains amplifying, the driver can better must control the vehicle brake state, according to the brake needs, be easy to control the amplitude of stretcher action, can be fast or slow, quick push down on the pedal when meeting emergency situation is implemented braking at once, and vehicle moment stops; When braking brake does not need snap catch at ordinary times; the driver can be according to feeling slow push down on the pedal; vehicle is steadily braked; can avoid the problem really up to the mark of braking; can prevent driver's preshoot; can protect again vehicle component and load to avoid damaging, improve vehicle life span and driver operation traveling comfort.

Description of drawings

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

Among the figure: the 1-pedal, the 2-torque spring, the 3-roller, the 4-last item, the 5-S. A., the 6-sleeve, 7-adjusts screw, 8-base plate, 9-valve body.

The specific embodiment

By reference to the accompanying drawings the specific embodiment of the present utility model is described further.

Because Foot braking valve belongs to the precision valve class, shared volume is little, and valve body structure is compact, can't improve spool stroke on the existing structure basis, therefore, the spool steering unit only changes, driver's foot section stroke is amplified, steadily control vehicle brake thereby be beneficial to the driver.Fig. 1 has shown the pedal brake valve arrangement.Pedal 1 is hinged by S. A. 5 with base plate 8, and base plate 8 is fixing by screw and valve body 9, simultaneously, utilizes base plate 8 that brake activation valve is fixing onboard.Roller 3 is enclosed within on the last item 4, contacts with the upper surface of sleeve 6 simultaneously, and sleeve 6 is by contained spring direct effect spool.Torque spring 2 intermediate sleeve are on S. A. 5, and a side of torque spring 2 is enclosed within on the last item, and opposite side contacts with the bottom surface of pedal 1.The effect of adjusting screw 7 is the setting angle of being responsible for adjusting pedal 1.

Principle of work of the present utility model: when driver's push down on the pedal 1, pedal 1 will turn an angle around S. A. 5, torque spring 2 extrusions, one side of torque spring 2 forces last item 4 to drive roller 3 compressing sleeves 6, thereby make sleeve 6 move downward the extruding spool and make the spool action, get through the oil circuit that energy storage causes drg, implement braking.Pedal 1 originally is by last item 4 direct and roller 3 rigidity handing-over, make in the spool course of action at driver's pedal 1, pedal 1 moves with roller 3 and last item 4 whole S. A. 5 rigidity that center on, relative distance between pedal 1 and the roller 3 does not change, and when roller 3 motions stopped, pedal 1 also stopped operating, at this moment, the stroke of pedal 1 depends on the horizontal displacement between last item 4 and the S. A. 5 fully, and therefore, the stroke of pedal 1 is very limited.Cancellation pedal 1 is directly hinged with roller 3, the two is split up into two relatively independent members, and middle by arranging that torque spring 2 associates the two, torque spring 2 intermediate sleeve are on S. A. 5, one side of torque spring 2 is enclosed within on the last item, and opposite side contacts with the bottom surface of pedal 1.Like this, just consisted of between pedal 1 and the roller 3 and be flexible coupling, when pedal 1 rotates around S. A. 5, the displacement between pedal 1 and the roller 3 will change, and the variable quantity of displacement depends on the size of treadle effort and the size of torque spring rigidity.The torque spring rigidity Design is wanted rationally, namely wants effectively to amplify pedal stroke, guarantees that again torque spring is unlikely excessively soft, prevents that pedal stroke from excessively amplifying, and affects the braking response time.Like this, pedal stroke just is comprised of two parts, a part is that spool moves downward the pedal that causes and rotates to an angle, another part is that the pedal that the torque spring distortion causes rotates to an angle, this two classes stroke is mutually cumulative to carry out simultaneously, and guarantees that spool is constantly stressed in the pedal rotary course.As seen, and original pedal stroke relatively, newly designs pedal stroke and obtain amplifying, and the change amount of the pedal angle that the torque spring distortion causes is the stroke that pedal amplifies.

Claims (1)

1. hydraulic brake valve with the pedal stroke enlarger, comprise pedal (1), base plate (8) and valve body (9), it is characterized in that it also comprises roller (3) and sleeve (6), described pedal (1) is connected by S. A. (5) radial type with base plate (8), base plate (8) is captiveed joint with valve body (9), roller (3) is enclosed within on the last item (4), roller (3) contacts with the upper surface of sleeve (6) simultaneously, sleeve (6) inside is provided with spring and connects the inner spool of valve body (9), the upper sheathed torque spring (2) of S. A. (5), torque spring (2) one sides are enclosed within on the last item (4), and opposite side contacts with the bottom surface of pedal (1).

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