CN105564398A - Variable hydraulic oil cylinder and braking system - Google Patents
Variable hydraulic oil cylinder and braking system Download PDFInfo
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- CN105564398A CN105564398A CN201610028198.3A CN201610028198A CN105564398A CN 105564398 A CN105564398 A CN 105564398A CN 201610028198 A CN201610028198 A CN 201610028198A CN 105564398 A CN105564398 A CN 105564398A
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- piston
- seal ring
- oilhole
- oil
- spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/224—Master control, e.g. master cylinders with pressure-varying means, e.g. with two stage operation provided by use of different piston diameters including continuous variation from one diameter to another
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention relates to a variable hydraulic oil cylinder and a braking system. The variable hydraulic oil cylinder comprises a first piston, a second piston, a first spring, a second spring, an input push block and a hollow shell. The first piston, the second piston and the second spring are all arranged in the shell, and the second piston is sleeved with the first piston. One end of the second spring abuts against the bottom wall of the shell, and the other end of the second spring abuts against the lower end face of the first piston. The lower end of the first piston is sleeved with a bearing pedestal. The input push block abuts against the second piston. One end of the first spring abuts against the first piston, and the other end of the first spring abuts against the input push block. An oil passage is formed between the outer wall of the second piston and the inner wall of the first piston. The first piston is provided with a first oil hole and a second oil hole, and the first oil hole and the second oil hole penetrate through the side wall of the first piston. The second piston is sleeved with a first seal ring. The first piston and the second piston are different in diameter, the lever ratio of input force to output force is changed in the braking process, and therefore braking is realized with small input force.
Description
Technical field
The present invention relates to vehicle brake technology, particularly a kind of type variable hydraulic ram and brake system.
Background technology
The disc brake brake system of general two-wheeled motor vehicle mainly applies pressure by promotion brake-applying handle or brake pedal to master cylinder, and make the inner hydrodynamic force of master cylinder, hydraulic coupling is delivered on drg by oil pipe, for vehicle provides braking force.The lever ratio of this design Input Forces and power output is definite value, when occurring needing emergency braking, can only be delivered on drg as car load provides Emergency Negative Thrust by certain lever ratio by the maximum power of entering of input, braking force increases according to the increase of Input Forces, if drive people (as Ms etc.) when cannot input larger power, run into when needing emergency braking and cannot provide maximum braking force for vehicle, easily occur dangerous or have an accident.
Summary of the invention
Based on this, be necessary the defect for prior art, provide a kind of type variable hydraulic ram and brake system, when Input Forces reaches certain value, the lever ratio of constrained input can change, and realizes realizing braking with less Input Forces.
Its technical scheme is as follows:
A kind of type variable hydraulic ram, comprise first piston, second piston, first spring, second spring, the housing of input pushing block and hollow, described first piston, second piston and the second spring are all arranged in housing, and first piston is set in outside the second piston, one end of second spring is connected on the diapire of housing, the other end is connected on the lower surface of first piston, the lower end of first piston is arranged with leather cup, the middle part of described input pushing block is against the upper end of the second piston, one end of described first spring is connected on the upper surface of first piston, the other end is connected to the sidepiece of described input pushing block, oil passage is offered between the outer wall of described second piston and first piston inwall, first piston offers the first oilhole running through its sidewall, second oilhole, second piston jacket is provided with the first seal ring, the second seal ring is provided with between described housing and first piston, 3rd seal ring, described second seal ring is between the first oilhole and the second oilhole, described 3rd seal ring is positioned at the upside of the first oilhole, the inner walls that described first oilhole is corresponding with it surrounds the first oil cabinet, the inner walls that described second oilhole is corresponding with it surrounds the second oil cabinet, the sidewall of described housing offers the first inlet nozzle with its inner space, the second inlet nozzle be communicated with the second oil cabinet, under preset state, first inlet nozzle is positioned on the downside of leather cup, and the first oilhole is communicated with by oil passage with the second oilhole, described first seal ring is positioned at the upside of oil passage, when first piston moves down, the volume of the first oil cabinet increases, leather cup moves down blocks the first inlet nozzle, the housing cavity at the second spring place forms the hydraulic pressure chamber being used for output hydraulic pressure, when the relative first piston of the second piston moves down, the first seal ring moves down blocks described oil passage.
Its further technical scheme is as follows:
Described type variable hydraulic ram also comprises clamp nut, first piston diameter on the downside of first oilhole is greater than the first piston diameter on the upside of the first oilhole, described clamp nut is set in outside first piston, and the lower surface of clamp nut is against on the first piston on the downside of the first oilhole, the outer wall of clamp nut is connected with the inwall of housing, the junction of the lower surface of clamp nut and its inwall digs fluted, and described 3rd seal ring is placed in described groove.
Described type variable hydraulic ram also comprises pad, described inner walls is provided with step, described pad is arranged on described step, described clamp nut is pressed on the upper surface of described pad, and the lower surface of pad is against on the first piston on the downside of the first oilhole, under preset state, the first oilhole is corresponding with the inwall of described pad, and described pad inwall lower end is the up-small and down-big conical surface.
The middle part of described input pushing block is protruded downwards and is connected with the upper end of described second piston, and the lower end of described second piston is provided with the pressing plate be attached thereto, and the sidepiece of described pressing plate is against in the middle part of the lower surface of described first piston.
The outer wall upper end of described first piston is hierarchic structure, the lower end of described first spring is against hierarchic structure place, the upper end of described first piston is stretched out in the upper end of described second piston, and the middle part of described input pushing block is stretched in the first spring and is connected with the upper end of the second piston.
Described type variable hydraulic ram also comprises dust boot, and described dust boot is connected with described housing upper end, and the upper end of input pushing block, first piston and the second piston is all positioned at dust boot.
Also be provided with the 4th seal ring and the 5th seal ring between described second piston and first piston, described 4th seal ring is positioned on the upside of the first seal ring, and described 5th seal ring is positioned at the downside of oil passage.
A kind of brake system, comprise universal driving shaft, brake cable pull, first drg, second brake and described type variable hydraulic ram, described hydraulic pressure chamber is communicated with the first drg by oil connector, described housing sidewall be provided with respectively with the first inlet nozzle, the oil can joint that second inlet nozzle is communicated with, one end of described brake cable pull is connected with second brake, the other end is connected with brake pedal or brake-applying handle, described input pushing block is connected with one end of universal driving shaft by push rod, the other end of described universal driving shaft is connected with brake cable pull, or the other end of universal driving shaft is enclosed within brake cable pull, and brake cable pull between described second brake and universal driving shaft is coated with crust, described crust is against on universal driving shaft.
Described input pushing block is provided with holding tank away from the end face of the second piston, packing ring is provided with in described holding tank, cutting somebody's hair of described push rod is against on the diapire of holding tank through packing ring, the sidewall of holding tank digs the first draw-in groove, be provided with the first jump ring in described first draw-in groove, described first jump ring is pressed on packing ring.
The outer wall of described housing has dug mounting groove, the diapire of described mounting groove is communicated with the first inlet nozzle, the second inlet nozzle respectively, described oil can jiont treatment is in described mounting groove, and be provided with the 6th seal ring between the outer wall of described oil can joint and the sidewall of mounting groove, the sidewall of described mounting groove digs the second draw-in groove, be provided with the second jump ring in described second draw-in groove, described second jump ring is pressed on described oil can joint.
Below the advantage of preceding solution or principle are described:
Above-mentioned type variable hydraulic ram, at the braking initial stage, input force is on input pushing block, input pushing block promotes the first spring and the second piston simultaneously, and the first spring promotes first piston, makes first piston and the second piston simultaneously to moving down, leather cup moves down thereupon blocks the first inlet nozzle, make the housing cavity on the downside of leather cup produce hydraulic pressure and form hydraulic pressure chamber, be delivered on drg by brake pipe, for vehicle provides braking force, along with the increase of Input Forces, first piston moves to hydraulic pressure chamber direction together with the second piston, the volume of the first oil cabinet increases gradually, hydraulic oil in second oil cabinet enters in the first oil cabinet by oil passage, the hydraulic pressure of hydraulic pressure chamber rises gradually simultaneously, second spring is compressed, the resistance of the second spring to first piston increases gradually, when the resistance of hydraulic pressure to first piston of hydraulic pressure chamber adds that the resistance of the second spring to first piston equals the thrust of the first spring to first piston, first piston stop motion, Input Forces continues to increase, now input pushing block to promote the second piston and move to hydraulic pressure chamber direction separately, now the lever ratio of constrained input changes, when continuing to apply Input Forces, when the first seal ring is after the first oilhole, first seal ring seals oil passage immediately, the hydraulic oil of the second oil cabinet cannot flow to the first oil cabinet, and between housing and first piston, be provided with the second seal ring, 3rd seal ring, second seal ring is positioned at the downside of the first oilhole, described 3rd seal ring is positioned at the upside of the first oilhole, the first oil cabinet is made to form the space of a sealing, although the hydraulic pressure of hydraulic pressure chamber continues to raise, but fluid first oil cabinet cannot be compressed or be expanded, so first piston also cannot downwards or upward movement, be fixed on current location, prevent first piston return, avoid pressure release, when ensureing that the second piston continues to think that hydraulic pressure chamber moves, hydraulic pressure chamber internal pressure and Input Forces are fixed proportion.Due to first piston and the second diameter of piston different, the pressure that identical Input Forces produces is different, therefore in braking procedure, change the lever ratio of Input Forces and power output, can realize braking with the realization of less Input Forces.
Above-mentioned brake system, Input Forces is applied to brake pedal or brake-applying handle, brake pedal or brake-applying handle drive drag-line directly to provide braking force for second brake, due to application force and the antagonistic force of brake cable pull, brake cable pull pulls universal driving shaft or crust to promote universal driving shaft, thus promotes input pushing block, for the first drg provides braking force by push rod, when the thrust that universal driving shaft provides be greater than the second piston to work independently some time, the braking force now provided for the first drg increases.
Accompanying drawing explanation
Fig. 1 is the generalized section one of the type variable hydraulic ram described in the embodiment of the present invention;
Fig. 2 is the close-up schematic view of Fig. 1;
Fig. 3 is the generalized section two of the type variable hydraulic ram described in the embodiment of the present invention;
Fig. 4 is the working curve diagram of the type variable hydraulic ram described in the embodiment of the present invention;
Fig. 5 is the schematic diagram of the brake system described in the embodiment of the present invention;
The braking effect figure that Fig. 6 is the brake system described in the embodiment of the present invention.
Description of reference numerals:
1, type variable hydraulic ram, 2, universal driving shaft, 3, brake cable pull, 4, first drg, 5, second brake, 6, brake pedal, 7, push rod, 71, cut somebody's hair, 8, crust, 9, brake-applying handle, 10, first piston, 11, oil passage, 12, first oil cabinet, 13, second oil cabinet, 110, first oilhole, 120, second oilhole, 20, second piston, 21, pressing plate, 30, first spring, 40, second spring, 50, input pushing block, 51, packing ring, 52, first jump ring, 60, housing, 61, dust boot, 62, oil connector, 63, oil can joint, 64, second jump ring, 610, first inlet nozzle, 620, second inlet nozzle, 630, hydraulic pressure chamber, 640, step, 70, leather cup, 81, first seal ring, 82, second seal ring, 83, 3rd seal ring, 84, 4th seal ring, 85, 5th seal ring, 86, 6th seal ring, 90, clamp nut, 91, pad, 910, groove.
Detailed description of the invention
As shown in Figures 1 to 3, a kind of type variable hydraulic ram 1, comprise first piston 10, second piston 20, first spring 30, second spring 40, the housing 60 of input pushing block 50 and hollow, described first piston 10, second piston 20 and the second spring 40 are all arranged in housing 60, and first piston 10 is set in outside the second piston 20, one end of second spring 40 is connected on the diapire of housing 60, the other end is connected on the lower surface of first piston 10, the lower end of first piston 10 is arranged with leather cup 70, the middle part of described input pushing block 50 is against the upper end of the second piston 20, one end of described first spring 30 is connected on the upper surface of first piston 10, the other end is connected to the sidepiece of described input pushing block 50, oil passage 11 is offered between the outer wall of described second piston 20 and first piston 10 inwall, first piston 10 offers the first oilhole 110 running through its sidewall, second oilhole 120, the first seal ring 81 is arranged with outside second piston 20, the second seal ring 82 is provided with between described housing 60 and first piston 10, 3rd seal ring 83, described second seal ring 82 is between the first oilhole 110 and the second oilhole 120, described 3rd seal ring 83 is positioned at the upside of the first oilhole 110, housing 60 inwall that described first oilhole 110 is corresponding with it surrounds the first oil cabinet 12, housing 60 inwall that described second oilhole 120 is corresponding with it surrounds the second oil cabinet 13, the sidewall of described housing 60 offers the first inlet nozzle 610 with its inner space, the second inlet nozzle 620 be communicated with the second oil cabinet 13, under preset state, first inlet nozzle 610 is positioned on the downside of leather cup 70, and the first oilhole 110 is communicated with by oil passage 11 with the second oilhole 120, described first seal ring 81 is positioned at the upside of oil passage 11, when first piston 10 moves down, the volume of the first oil cabinet 12 increases, leather cup 70 moves down blocks the first inlet nozzle 610, the housing cavity at the second spring 40 place forms the hydraulic pressure chamber 630 being used for output hydraulic pressure, when first piston 10 moves down the second piston 20 relatively, the first seal ring 81 moves down blocks described oil passage 11.
At the braking initial stage, input force is on input pushing block 50, input pushing block 50 promotes the first spring 30 and the second piston 20 simultaneously, first spring 30 promotes first piston 10, make first piston 10 and the second piston 20 simultaneously to moving down, leather cup 70 moves down thereupon blocks the first inlet nozzle 610, makes housing 60 inner chamber on the downside of leather cup 70 produce hydraulic pressure and forms hydraulic pressure chamber 630, be delivered on drg by brake pipe, for vehicle provides braking force, along with the increase of Input Forces, first piston 10 moves to hydraulic pressure chamber 630 direction together with the second piston 20, the volume of the first oil cabinet 12 increases gradually, the volume of the first oil cabinet 12 increases gradually and realizes by various ways, part as inner walls is corresponding with the first oilhole 110 shift motion is arranged to the up-small and down-big conical surface or cascaded surface, also or on this piece housing inwall the different oil resevoir etc. of volume is dug, hydraulic oil in second oil cabinet 13 enters in the first oil cabinet 12 by oil passage 11, the hydraulic pressure of hydraulic pressure chamber 630 rises gradually simultaneously, second spring 40 is compressed, the resistance of the second spring 40 pairs of first pistons 10 increases gradually, when the resistance of hydraulic pressure to first piston 10 of hydraulic pressure chamber 630 adds that the resistance of the second spring 40 pairs of first pistons 10 equals the thrust of the first spring 30 pairs of first pistons 10, first piston 10 stop motion, Input Forces continues to increase, now input pushing block 50 to promote the second piston 20 and move to hydraulic pressure chamber 630 direction separately, now the lever ratio of constrained input changes, when continuing to apply Input Forces, wherein the first seal ring 81 is embedded on the second piston 20, mobile with the movement of the second piston 20, when the first seal ring 81 is after the first oilhole 110, first seal ring 81 seals oil passage 11 immediately, the hydraulic oil of the second oil cabinet 13 cannot flow to the first oil cabinet 12, and between housing 60 and first piston 10, be provided with the second seal ring 82, 3rd seal ring 83, second seal ring 82 is positioned at the downside of the first oilhole 110, described 3rd seal ring 83 is positioned at the upside of the first oilhole 110, the first oil cabinet 12 is made to form the space of a sealing, although the hydraulic pressure of hydraulic pressure chamber 630 continues to raise, but fluid first oil cabinet 12 cannot be compressed or be expanded, so first piston 10 also cannot downwards or upward movement, be fixed on current location, prevent first piston 10 return, avoid pressure release, when ensureing that the second piston 20 continues to think that hydraulic pressure chamber 630 moves, hydraulic pressure chamber 630 internal pressure and Input Forces are fixed proportion.As shown in Figure 4, from P=F/S, due to first piston 10 and the second piston 20 diameter different, the pressure that identical Input Forces produces is different, therefore in braking procedure, change the lever ratio of Input Forces and power output, can realize realizing braking with less Input Forces.
As shown in Figure 1, 2, described type variable hydraulic ram 1 also comprises clamp nut 90, first piston 10 diameter on the downside of first oilhole 110 is greater than first piston 10 diameter on the upside of the first oilhole 110, described clamp nut is set in outside first piston 10, and the lower surface of clamp nut 90 is against on the first piston 10 on the downside of the first oilhole 110, the outer wall of clamp nut is connected with the inwall of housing 60, the lower surface of clamp nut 90 and the junction of its inwall dig fluted 910, and described 3rd seal ring 83 is placed in described groove 910.Outer wall and housing 60 inwall of clamp nut 90 are threaded connection, and clamp nut 90 pushes down first piston 10 at the braking initial stage, makes first piston 10 be in predeterminated position, avoids first piston 10 to eject housing 60.Described groove 910 is arranged on the lower surface of clamp nut and the junction of its inwall, make groove 910 in inverted "L" shaped structure, first the 3rd seal ring 83 is enclosed within outside first piston 10 during installation, then locks clamp nut 90, after locking, the 3rd seal ring 83 embeds in described groove 910, is convenient to install.
As shown in Figure 1, 2, described type variable hydraulic ram 1 also comprises pad 91, described housing 60 inwall is provided with step 640, described pad 91 is arranged on described step 640, described clamp nut 90 is pressed on the upper surface of described pad 91, and the lower surface of pad 91 is against on the first piston 10 on the downside of the first oilhole 110, under preset state, first oilhole 110 is corresponding with the inwall of described pad 91, and described pad 91 inwall lower end is the up-small and down-big conical surface.Clamp nut 90 pushes down first piston 10 by pad 91, time under preset state, inwall and first oilhole 110 of pad 91 surround the first oil cabinet 12, and pad 91 inwall lower end is the up-small and down-big conical surface, when first piston 10 is moved down, the volume of the first oil cabinet 12 constantly increases.And first piston 10 is when moving down, 3rd seal ring 83 is spacing in groove 910 by pad 91, do not move down with first piston 10, the internal diameter of the 3rd seal ring 83 is less than the external diameter of first piston 10, described second seal ring 82 is embedded on the outer wall of first piston 10, mobile with the movement of first piston 10.
As shown in Figure 1,3, the middle part of described input pushing block 50 is protruded downwards and is bolted with the upper end of described second piston 20, be convenient to directly to promote the second piston 20 move, and step down between clearancen for installing the first spring 30, the lower end of described second piston 20 is provided with the pressing plate 21 be attached thereto, the sidepiece of described pressing plate 21 is against in the middle part of the lower surface of described first piston 10, makes first piston 10 and the second piston 20 form an entirety at the braking initial stage, exert a force to hydraulic pressure chamber 630 by pressing plate 21.Described in the present embodiment, the outer wall upper end of first piston 10 is hierarchic structure, the lower end of described first spring 30 is against hierarchic structure place, the upper end of described first piston 10 is stretched out in the upper end of described second piston 20, and the middle part of described input pushing block 50 is stretched in the first spring 30 and is connected with the upper end of the second piston 20.By the middle part of input pushing block 50 is protruded, and the upper end of described first piston 10 is stretched out in the upper end of the second piston 20, thus the space formed between the sidepiece and the upper surface of first piston 10 of input pushing block 50 for installing the first spring 30, and the outer wall upper end of first piston 10 is arranged in hierarchic structure, the first spring 30 lower end is made to be enclosed within first piston 10, first spring 30 upper end is enclosed within the middle part of input pushing block 50, avoids the first spring 30 slippage.
As shown in Figure 1,3, described type variable hydraulic ram 1 also comprises dust boot 61, and described dust boot 61 is connected with described housing 60 upper end, and the upper end of input pushing block 50, first piston 10 and the second piston 20 is all positioned at dust boot 61.This structure is convenient to the installation to first piston 10, second piston 20 and the first spring 30, clamp nut 90, and by arranging dust boot 61 for dust-proof and waterproof, dust boot 61 is fastened on housing 60.
As shown in 1 to 3, be also provided with the 4th seal ring 84 and the 5th seal ring 85 between described second piston 20 and first piston 10, described 4th seal ring 84 is positioned on the upside of the first seal ring 81, and described 5th seal ring 85 is positioned at the downside of oil passage 11.During the second piston 20 independently moving, first seal ring 81 is after the first oilhole 110, by arranging the 4th seal ring 84, make to be formed between the first piston 10 on the upside of the first oilhole 110 and the second piston 20 to seal, thus the first oil cabinet 12 is sealed further, avoid pressure release, by arranging the 5th seal ring 85, make to be formed between the first piston 10 on the downside of the second oilhole 120 and the second piston 20 to seal, avoid the hydraulic oil in the second oil cabinet 13 to reveal.
As Fig. 1, shown in 5, a kind of brake system, comprise universal driving shaft 2, brake cable pull 3, first drg 4, second brake 5 and described type variable hydraulic ram 1, described hydraulic pressure chamber 630 is communicated with the first drg 4 by oil connector 62, described housing 60 sidewall be provided with respectively with the first inlet nozzle 610, the oil can joint 63 that second inlet nozzle 620 is communicated with, one end of described brake cable pull 3 is connected with second brake 5, the other end is connected with brake pedal 6, described input pushing block 50 is connected with one end of universal driving shaft 2 by push rod 7, the other end of described universal driving shaft 2 is connected with brake cable pull 3, or the other end of universal driving shaft 2 is enclosed within brake cable pull 3, and brake cable pull 3 between described second brake 5 and universal driving shaft 2 is coated with crust 8, described crust 8 is against on universal driving shaft 2.The first drg 4 in the present embodiment is front-wheel brakes, second brake 5 is rear wheeies brake, and the first drg 4 is also connected with brake-applying handle 9, realizes braking further.According to the actual requirements, brake cable pull 3 also can be connected with another one brake-applying handle 9, and the first drg 4 is connected with another one brake pedal 6.
Hydraulic oil in oil can joint 63 enters hydraulic pressure chamber 630 through the first inlet nozzle 610, and the hydraulic pressure in hydraulic pressure chamber 630 is passed to the first drg 4 by oil connector 62, and the hydraulic oil in oil can joint 63 enters the second oil cabinet 13 through the second inlet nozzle 620.By applying Input Forces to brake pedal 6, brake pedal 6 drives drag-line directly to provide braking force for second brake 5, due to application force and the antagonistic force of brake cable pull 3, brake cable pull 3 pulls universal driving shaft 2 or crust 8 to promote universal driving shaft 2, thus promote input pushing block 50 by push rod 7, for the first drg 4 provides braking force, as Fig. 4, shown in 6, when the thrust that universal driving shaft 2 provides is greater than type variable hydraulic cylinder piston work handover point, the braking force now provided for the first drg 4 increases, compare conventional art, general master cylinder keeps certain lever ratio on constrained input, and the lever ratio of type variable hydraulic ram 1 constrained input when Input Forces reaches certain value described in the present embodiment can change, snap catch can be realized with less Input Forces.As shown in Figure 6, when the second piston 20 starts to work independently, front and back are formulated power distribution and are transferred, and the braking force distributing to front-wheel brake increases.Because center of gravity reach during motorcycle brake, after the second piston 20 works independently, front wheel brake power can correspondingly increase, then can improve brake efficiency, improves braking deceleration, shortens stopping distance, improves braking safety.The front braking of general motor bike is fluid pressure type, rear braking is mechanical type, the situation that apportioning valve structure is roused after not being suitable for front dish, and the brake system described in the present embodiment can be adapted to motor bike, by switching two different pistons of diameter, the front braking force ratio within the scope of Input Forces is increased.
As shown in Figure 1,3, described input pushing block 50 is provided with holding tank away from the end face of the second piston 20, packing ring 51 is provided with in described holding tank, cutting somebody's hair of described push rod 7 71 is against on the diapire of holding tank through packing ring 51, the sidewall of holding tank digs the first draw-in groove, be provided with the first jump ring 52 in described first draw-in groove, described first jump ring 52 is pressed on packing ring 51.Cutting somebody's hair of described push rod 7 front end 71 to be pressed in by the first jump ring 52 and packing ring 51 and to input on pushing block 50, push rod 7 is avoided to skid off dust boot 61, the power of push rod 7 can be acted on input pushing block 50 reposefully, and described in cut somebody's hair 71 in hemispherical, increase its area of contact with input pushing block 50.
As shown in Figure 1,3, the outer wall of described housing 60 has dug mounting groove, the diapire of described mounting groove is communicated with the first inlet nozzle 610, second inlet nozzle 620 respectively, described oil can joint 63 is arranged in described mounting groove, and be provided with the 6th seal ring 86 between the outer wall of described oil can joint 63 and the sidewall of mounting groove, the sidewall of described mounting groove has dug the second draw-in groove, be provided with the second jump ring 64 in described second draw-in groove, described second jump ring 64 is pressed on described oil can joint 63.Described oil can joint 63 is fixed in mounting groove by the second jump ring 64, by described 6th seal ring 86, makes to seal between oil can joint 63 and the sidewall of mounting groove, avoids the hydraulic fluid leak of the second oil cabinet 13.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification sheets is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a type variable hydraulic ram, it is characterized in that, comprise first piston, second piston, first spring, second spring, the housing of input pushing block and hollow, described first piston, second piston and the second spring are all arranged in housing, and first piston is set in outside the second piston, one end of second spring is connected on the diapire of housing, the other end is connected on the lower surface of first piston, the lower end of first piston is arranged with leather cup, the middle part of described input pushing block is against the upper end of the second piston, one end of described first spring is connected on the upper surface of first piston, the other end is connected to the sidepiece of described input pushing block, oil passage is offered between the outer wall of described second piston and first piston inwall, first piston offers the first oilhole running through its sidewall, second oilhole, second piston jacket is provided with the first seal ring, the second seal ring is provided with between described housing and first piston, 3rd seal ring, described second seal ring is between the first oilhole and the second oilhole, described 3rd seal ring is positioned at the upside of the first oilhole, the inner walls that described first oilhole is corresponding with it surrounds the first oil cabinet, the inner walls that described second oilhole is corresponding with it surrounds the second oil cabinet, the sidewall of described housing offers the first inlet nozzle with its inner space, the second inlet nozzle be communicated with the second oil cabinet, under preset state, first inlet nozzle is positioned on the downside of leather cup, and the first oilhole is communicated with by oil passage with the second oilhole, described first seal ring is positioned at the upside of oil passage, when first piston moves down, the volume of the first oil cabinet increases, leather cup moves down blocks the first inlet nozzle, the housing cavity at the second spring place forms the hydraulic pressure chamber being used for output hydraulic pressure, when the relative first piston of the second piston moves down, the first seal ring moves down blocks described oil passage.
2. type variable hydraulic ram as claimed in claim 1, it is characterized in that, it also comprises clamp nut, first piston diameter on the downside of first oilhole is greater than the first piston diameter on the upside of the first oilhole, described clamp nut is set in outside first piston, and the lower surface of clamp nut is against on the first piston on the downside of the first oilhole, and the outer wall of clamp nut is connected with the inwall of housing, the junction of the lower surface of clamp nut and its inwall digs fluted, and described 3rd seal ring is placed in described groove.
3. type variable hydraulic ram as claimed in claim 2, it is characterized in that, it also comprises pad, described inner walls is provided with step, and described pad is arranged on described step, and described clamp nut is pressed on the upper surface of described pad, and the lower surface of pad is against on the first piston on the downside of the first oilhole, under preset state, the first oilhole is corresponding with the inwall of described pad, and described pad inwall lower end is the up-small and down-big conical surface.
4. type variable hydraulic ram as claimed in claim 1, it is characterized in that, the middle part of described input pushing block is protruded downwards and is connected with the upper end of described second piston, and the lower end of described second piston is provided with the pressing plate be attached thereto, and the sidepiece of described pressing plate is against in the middle part of the lower surface of described first piston.
5. type variable hydraulic ram as claimed in claim 4, it is characterized in that, the outer wall upper end of described first piston is hierarchic structure, the lower end of described first spring is against hierarchic structure place, the upper end of described first piston is stretched out in the upper end of described second piston, and the middle part of described input pushing block is stretched in the first spring and is connected with the upper end of the second piston.
6. the type variable hydraulic ram as described in any one of claim 1 to 5, it is characterized in that, it also comprises dust boot, and described dust boot is connected with described housing upper end, and the upper end of input pushing block, first piston and the second piston is all positioned at dust boot.
7. the type variable hydraulic ram as described in any one of claim 1 to 5, it is characterized in that, also be provided with the 4th seal ring and the 5th seal ring between described second piston and first piston, described 4th seal ring is positioned on the upside of the first seal ring, and described 5th seal ring is positioned at the downside of oil passage.
8. a brake system, it is characterized in that, comprise universal driving shaft, brake cable pull, first drg, second brake and the type variable hydraulic ram described in any one of claim 1 to 7, described hydraulic pressure chamber is communicated with the first drg by oil connector, described housing sidewall be provided with respectively with the first inlet nozzle, the oil can joint that second inlet nozzle is communicated with, one end of described brake cable pull is connected with second brake, the other end is connected with brake pedal or brake-applying handle, described input pushing block is connected with one end of universal driving shaft by push rod, the other end of described universal driving shaft is connected with brake cable pull, or the other end of universal driving shaft is enclosed within brake cable pull, and brake cable pull between described second brake and universal driving shaft is coated with crust, described crust is against on universal driving shaft.
9. brake system as claimed in claim 8, described input pushing block is provided with holding tank away from the end face of the second piston, packing ring is provided with in described holding tank, cutting somebody's hair of described push rod is against on the diapire of holding tank through packing ring, the sidewall of holding tank digs the first draw-in groove, be provided with the first jump ring in described first draw-in groove, described first jump ring is pressed on packing ring.
10. brake system as claimed in claim 9, the outer wall of described housing has dug mounting groove, the diapire of described mounting groove is communicated with the first inlet nozzle, the second inlet nozzle respectively, described oil can jiont treatment is in described mounting groove, and be provided with the 6th seal ring between the outer wall of described oil can joint and the sidewall of mounting groove, the sidewall of described mounting groove has dug the second draw-in groove, be provided with the second jump ring in described second draw-in groove, described second jump ring is pressed on described oil can joint.
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| CN201610028198.3A CN105564398B (en) | 2016-01-15 | 2016-01-15 | Type variable hydraulic cylinder and braking system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610028198.3A CN105564398B (en) | 2016-01-15 | 2016-01-15 | Type variable hydraulic cylinder and braking system |
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| CN105564398A true CN105564398A (en) | 2016-05-11 |
| CN105564398B CN105564398B (en) | 2018-06-05 |
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| CN201610028198.3A Active CN105564398B (en) | 2016-01-15 | 2016-01-15 | Type variable hydraulic cylinder and braking system |
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| CN112253575A (en) * | 2020-10-14 | 2021-01-22 | 贵州新安航空机械有限责任公司 | Split type piston |
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| CN105564398B (en) | 2018-06-05 |
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