CN2484438Y

CN2484438Y - Brake apparatus made of pump

Info

Publication number: CN2484438Y
Application number: CN 01246412
Authority: CN
Inventors: 李岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-10
Filing date: 2001-07-10
Publication date: 2002-04-03
Anticipated expiration: 2011-07-10

Abstract

The utility model relates to a pump braking device of a vehicle, which is characterized in that the device comprises a gear oil pump, a shell of the gear oil pump is arranged on a bracket, a driving gear of the oil pump is arranged on a wheel rim, meanwhile an oil way of the oil pump shell is provided with a control valve that brakes the oil of the pump flowing; operating a brake pedal enables the control valve core entry into the oil way of the oil pump to brake the oil flowing; meanwhile, under a role of the gear oil pump, pressure of the oil pump output end rises to brake the gear driving, namely a wheel is braked. The utility model relates to a pump braking device which uses inertia of braked objects to brake, which enables stable braking and ensures effect and safety. The utility model has no abrasion components which is also called outer braking driving equipment, therefore saves a good quantity of mechanical energy and benefits to environmental protection and reduces vehicles maintenance work load.

Description

Pump standard braking device

Technical field

The utility model relates to braking device, refers to a kind of pump standard braking device of vehicle especially.

Background technique

Generally there are cohesion style and piston ring type two classes in existing vehicle braked system, and its mode of braking all belongs to the friction braking.As everyone knows, the friction type braking system must include such as multiple external accessories such as brake block, air pump or oil pumps, both consumed a large amount of mechanical energy, and cause severe contamination, damage easily again, need frequent Maintenance and Repair, and more be because the abrasives critical temperature is low, wearing and tearing easily, heating, even the generation locking phenomenon, seriously restricting the operation of various vehicles and machinery, especially when vehicle during at the mountain area descent run, brake continuously very easily takes place to cause the accident because of braking device is malfunctioning for a long time.

Summary of the invention

The utility model provides a kind of pump standard braking device, makes it can be need not jump out the friction braking mode by external brake driving arrangement, directly utilizes the rotational energy of moving runner, causes the quiet liquid of the pump system device stall that dams, to realize the braking of moving runner.In the concrete scheme of the present utility model, include a gear oil pump, the housing of this gear oil pump is fixed on the support, driving gear in the oil pump is fixed on the moving runner, simultaneously, in the circulating oil path of the utility model in the gear oil pump housing, be provided with the control valve that liquid stream flows in the oil pump capable of blocking.Control valve in the utility model includes a valve body, a piston valve core and spool return spring, a brake piston and piston return spring; Two ends of valve body one end is provided with a pipe joint, and the other end is provided with a plug nut, and the input, the output terminal that are positioned at the valve body both sides are connected with input, the output circuit of gear oil pump respectively; Piston valve core is three stage structure, one section end is the push rod end, another section end is the holding end, intermediate section is a flow check piston, this piston valve core is seated between the pipe joint and plug nut in the valve body by piston return spring with its holding end, and the flow check piston slip of intermediate section places into the valve body oil circuit; The brake piston cunning fits on the spool that is positioned between push rod end and flow check piston, and is provided with a return spring between this brake piston and spool push rod end.

By last structure as seen, the driving gear of oil pump and moving runner are to install all-in-one-piece, when the flow check piston in piston valve core stage casing was not intercepted the oil circuit of oil pump, the driving gear of oil pump rotated with moving runner, and it is mobile in the pump housing to drive liquid stream together with the driven gear that is engaged with.And promoted by brake petal and when making that liquid stream flows in the flow check piston blocking-up oil pump, the oil pressure of oil pump output terminal increases when piston valve core, and rotate until suppressing oil pump gear, then moving runner that is stop operating is realized the purpose of braking.It is to be noted at this, when brake petal promotion piston valve core moves, brake piston and piston return spring are also passed descending thereupon, but, when flow check piston places when blocking liquid stream in the oil pump oil circuit gradually and flowing, the oil pressure of oil circuit output terminal can promote brake piston upwards, makes to have a leakage of oil seam between brake piston and flow check piston, and this just makes the utility model " locking " phenomenon can not occur in braking process.See thus, install vehicle of the present utility model when cruising, gear oil pump in the braking device is " idle running " state, liquid stream only playing the circulation cooling and lubricatedly waiting effect, but brake petal is stretched the flow check piston of piston valve core to insert and when blocking oil circuit, the pressure of oil pump output terminal increases gradually when operating, liquid stream stops to flow until static gradually, at this moment, oil pump gear also just stops operating, and moving runner promptly is braked.After loosening the brake, piston valve core sets back under the effect of spring restoring force gradually, and liquid stream also recovers to flow in the oil pump, and brake promptly is disengaged.

Can realize brake compensation, steadily and guarantee effectively for making the utility model on each wheel of front, rear, left and right that is arranged on vehicle, the utility model also can be provided with one and detect the amplification piston in valve body, this amplification its internal diameter of piston and spool are slippery, the head of piston can be stretched and insert in the valve body oil circuit, and the bottom of piston is seated on the return spring of using the plug nut support.

Description of drawings

Fig. 1 is a horizontal sectional schematic diagram of the present utility model.

Fig. 2 is vertical cross-sectional schematic of control valve of the present utility model.

Embodiment

An embodiment of the present utility model as shown in drawings.

At first see also Fig. 1.The utility model shown in Figure 1, be the pump standard braking device of a kind of device on wheel of vehicle, it includes a gear oil pump, the housing 1 of this gear oil pump is fixed on the vehicle hanging, and the driving gear 2 in the oil pump is fixed on the wheel-tyre, in the present embodiment, driving gear 2 is an internal gear, external gear 5 is engaged with (in a further embodiment, the engaging gear of oil pump can be two external gears, or planetary gear set).Number in the figure 4 is for being located at the circulating oil path in the oil pump case 1, and 3 is the oil circuit input end, and 6 is the oil circuit output terminal.As seen from the figure, in oil pump circulating oil path 4, be provided with the control valve 7 that liquid stream flows in the oil pump capable of blocking.Control valve 7 in the present embodiment includes a valve body 8, a piston valve core 10 and spool return spring 17, a brake piston 12 and piston return spring 11 as shown in Figure 2.The two ends one end of valve body 8 is provided with a pipe joint 9, and this pipe joint 9 is for the connecting tube that connects the system pedal; The other end of valve body 8 is provided with a plug nut 18, and the input, the output terminal 14,19 that are positioned at valve body 8 both sides are connected with input, the output circuit of gear oil pump respectively.The piston valve core 10 of control valve 7 is three stage structure in the present embodiment, one section end is push rod end (upper end among the figure), another section end is holding end (lower end among the figure), intermediate section is a flow check piston 13, this piston valve core 10 is seated between the pipe joint 9 and plug nut 18 in the valve body by piston return spring 17 with its holding end, and flow check piston 13 slips of intermediate section place in the valve body oil circuit; Brake piston 12 is sliding to be fitted on the spool that is positioned at 13 of push rod end and flow check pistons, and is provided with a return spring 11 between this brake piston 12 and spool push rod end.Seen by Fig. 2 that again present embodiment also is provided with one and detects amplification piston 15 in valve body 8, these amplification piston 15 its internal diameters and spool 10 are slippery, and are bearing in by a return spring 16 on the plug nut 17 of valve body 8.

Claims

1, a kind of pump standard braking device includes a gear oil pump, and the housing of this gear oil pump is fixed on the support, driving gear in the oil pump is fixed on the moving runner, it is characterized in that: be provided with the control valve that liquid stream flows in the oil pump capable of blocking in the circulating oil path in the gear oil pump housing; Said control valve includes a valve body, a piston valve core and spool return spring, a brake piston and piston return spring; Two ends of valve body one end is provided with a pipe joint, and the other end is provided with a plug nut, and the input, the output terminal that are positioned at the valve body both sides are connected with input, the output circuit of gear oil pump respectively; Piston valve core is three stage structure, one section end is the push rod end, another section end is the holding end, intermediate section is a flow check piston, this piston valve core is seated between the pipe joint and plug nut in the valve body by piston return spring with its holding end, and the flow check piston slip of intermediate section places into the valve body oil circuit; The brake piston cunning fits on the spool that is positioned between push rod end and flow check piston, and is provided with a return spring between this brake piston and spool push rod end.

2, according to the described pump standard of claim 1 braking device, it is characterized in that: also be provided with one and detect the amplification piston in valve body, this amplification its internal diameter of piston and spool are slippery, and are bearing in by a return spring on the plug nut of valve body.