CN105564398B - Type variable hydraulic cylinder and braking system - Google Patents
Type variable hydraulic cylinder and braking system Download PDFInfo
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- CN105564398B CN105564398B CN201610028198.3A CN201610028198A CN105564398B CN 105564398 B CN105564398 B CN 105564398B CN 201610028198 A CN201610028198 A CN 201610028198A CN 105564398 B CN105564398 B CN 105564398B
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- 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
-
- 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 present invention relates to a kind of type variable hydraulic cylinder and braking systems, the type variable hydraulic cylinder includes first piston, second piston, first spring, second spring, input pushing block and hollow housing, first piston, second piston and second spring are arranged in housing, and first piston is set in outside second piston, one end of second spring is connected on the bottom wall of housing, the other end is connected on the lower face of first piston, the lower end of first piston is arranged with leather cup, input pushing block is against the upper of second piston, one end of first spring is connected to the upper of first piston, the other end is connected on the input pushing block, oil passage is offered between the outer wall of second piston and first piston inner wall, the first oilhole through its side wall is offered on first piston, second oilhole, the first sealing ring is arranged with outside second piston.First piston and second piston diameter are different, change the lever ratio of input power and power output in braking process, are realized and braked with smaller input power.
Description
Technical field
The present invention relates to vehicle brake technology, more particularly to a kind of type variable hydraulic cylinder and braking system.
Background technology
The disc brake braking system of general two-wheeled motor vehicle is mainly by promoting brake handle or brake pedal to main oil
Cylinder applies pressure, makes hydrodynamic force inside master cylinder, and hydraulic coupling is transferred to by oil pipe on brake, and braking is provided for vehicle
Power.The lever ratio of this design input power and power output is definite value, can only be maximum by inputting when there is needing emergency braking
Enter power and be transferred to by certain lever ratio on brake and provide Emergency Negative Thrust for vehicle, brake force according to the increase of input power and
Increase, if riding people (such as Ms) can not input larger power, running into can not provide when needing emergency braking for vehicle
Maximum braking force is susceptible to danger or accident occurs.
The content of the invention
Based on this, it is necessary to the defects of for the prior art, a kind of type variable hydraulic cylinder and braking system are provided, defeated
Entering to input when power reaches certain value can change with the lever ratio exported, realize and realize braking with smaller input power.
Its technical solution is as follows：
A kind of type variable hydraulic cylinder, including first piston, second piston, the first spring, second spring, input pushing block and
Hollow housing, the first piston, second piston and second spring are arranged in housing, and first piston is set in second
Outside piston, one end of second spring is connected on the bottom wall of housing, and the other end is connected on the lower face of first piston, and first lives
The lower end of plug is arranged with leather cup, the upper end of second piston is against in the middle part of the input pushing block, one end of first spring is supported
It is connected on the upper surface of first piston, the other end is connected to the side of the input pushing block, the outer wall of the second piston and the
Oil passage is offered between one piston inner wall, the first oilhole through its side wall, the second oilhole are offered on first piston, the
Two piston jackets are equipped with the first sealing ring, and the second sealing ring, the 3rd sealing ring are equipped between the housing and first piston, described
For second sealing ring between the first oilhole and the second oilhole, the 3rd sealing ring is located at the upside of the first oilhole, and described
The corresponding inner walls of one oilhole surround the first accumulator, and the corresponding inner walls of second oilhole surround second
Accumulator offers the first inlet nozzle connected with its inner cavity, connected with the second accumulator second on the side wall of the housing
Inlet nozzle, under preset state, the first inlet nozzle is located on the downside of leather cup, and the first oilhole is connected with the second oilhole by oil passage
Logical, first sealing ring is located at the upside of oil passage, when first piston moves down, the volume increase of the first accumulator, and skin
Bowl, which moves down, blocks the first inlet nozzle, and the housing cavity where second spring forms the hydraulic pressure chamber for output hydraulic pressure；When the second work
When the opposite first piston of plug moves down, the first sealing ring, which moves down, blocks the oil passage.
Its further technical solution is as follows：
The type variable hydraulic cylinder further includes clamp nut, and the first piston diameter on the downside of the first oilhole is more than first
First piston diameter on the upside of oilhole, the clamp nut are set in outside first piston, and the lower face of clamp nut is against
On first piston on the downside of one oilhole, the outer wall of clamp nut and the inner wall of housing connect, in the lower face of clamp nut and its
The junction of wall digs fluted, and the 3rd sealing ring is placed in the groove.
The type variable hydraulic cylinder further includes gasket, and the inner walls are equipped with step, and the gasket is arranged on
On the step, the clamp nut is pressed on the upper surface of the gasket, and the lower face of gasket is against on the downside of the first oilhole
First piston on, under preset state, the first oilhole is corresponding with the inner wall of the gasket, the gasket inner wall lower end present it is small under
The big conical surface.
The middle part of the input pushing block is downwardly projecting and is connected with the upper end of the second piston, under the second piston
End is equipped with the pressing plate being attached thereto, and the side of the pressing plate is against in the middle part of the lower face of the first piston.
The outer wall upper end of the first piston is in hierarchic structure, and the lower end of first spring is against at hierarchic structure, institute
The upper end of the first piston is stretched out in the upper end for stating second piston, is stretched into the middle part of the input pushing block in the first spring with second
The upper end connection of piston.
The type variable hydraulic cylinder further includes dust cover, and the dust cover is connected with the housing upper end, and inputs
The upper end of pushing block, first piston and second piston is respectively positioned in dust cover.
The 4th sealing ring and the 5th sealing ring, the 4th sealing ring are additionally provided between the second piston and first piston
On the upside of the first sealing ring, the 5th sealing ring is located at the downside of oil passage.
A kind of braking system, including universal driving shaft, brake cable, the first brake, second brake and the type variable
Hydraulic cylinder, the hydraulic pressure chamber are connected by oil connection with the first brake, and the housing sidewall is equipped with respectively with first
Inlet nozzle, the oil can connector of the second inlet nozzle connection, one end of the brake cable are connected with second brake, the other end and system
Dynamic pedal or brake handle connection, the input pushing block are connected by one end of push rod and universal driving shaft, the universal driving shaft it is another
End is connected or the other end of universal driving shaft is sleeved on brake cable with brake cable, and the second brake and universal driving shaft it
Between brake cable on be coated with crust, the crust is against on universal driving shaft.
The end face of the input pushing block away from second piston is equipped with holding tank, and washer is equipped in the holding tank, described
Cutting somebody's hair for push rod is against through washer on the bottom wall of holding tank, and the first card slot, first card have been dug on the side wall of holding tank
The first clamp spring is equipped in slot, first clamp spring is pressed on washer.
The outer wall of the housing has dug mounting groove, the bottom wall of the mounting groove respectively with the first inlet nozzle, the second oil inlet
Mouth connects, and the oil can connector is mounted in the mounting groove, and between the outer wall of the oil can connector and the side wall of mounting groove
Equipped with the 6th sealing ring, the second card slot is dug on the side wall of the mounting groove, the second clamp spring, institute are equipped in second card slot
The second clamp spring is stated to be pressed on the oil can connector.
The advantages of below to preceding solution or principle illustrate：
Above-mentioned type variable hydraulic cylinder, at braking initial stage, on input pushing block, input pushing block promotes input force simultaneously
First spring and second piston, the first spring promote first piston, make first piston and second piston simultaneously to moving down, leather cup with
Move down and block the first inlet nozzle, the housing cavity on the downside of leather cup is made to generate hydraulic pressure and forms hydraulic pressure chamber, is transferred by brake pipe
Onto brake, brake force is provided for vehicle；With the increase of input power, first piston is together with second piston to hydraulic pressure chamber side
To movement, the volume of the first accumulator gradually increases, and the indoor hydraulic oil of the second oil storage enters the first oil storage by oil passage
Interior, while the hydraulic pressure of hydraulic pressure chamber is gradually increasing, second spring is compressed, and second spring gradually increases the resistance of first piston
Greatly, when the hydraulic pressure of hydraulic pressure chamber is equal to the resistance of first piston plus second spring the resistance of first piston on the first spring to the
During the thrust of one piston, first piston stop motion；Input power continues to increase, at this time input pushing block promote second piston individually to
Hydraulic pressure chamber direction moves, and inputs change with the lever ratio exported at this time, when continuing to input power, when the first sealing ring passes through
After crossing the first oilhole, the first sealing ring seals oil passage immediately, and the hydraulic oil of the second accumulator can not flow to the first accumulator,
And the second sealing ring, the 3rd sealing ring are equipped between housing and first piston, the second sealing ring is located under the first oilhole
Side, the 3rd sealing ring are located at the upside of the first oilhole, the first accumulator are made to form the space of a sealing, although hydraulic pressure chamber
Hydraulic pressure continue to raise, but the first accumulator of fluid can not be compressed or expanded, thus first piston also can not downwards or to
Upper movement, is fixed on current location, prevents first piston return, avoids pressure release, ensures that second piston continues to transport to hydraulic pressure chamber
When dynamic, hydraulic pressure room pressure is in fixed proportion with input power.Since first piston and second piston diameter are different, identical is defeated
It is different to enter the pressure of power generation, therefore changes the lever ratio of input power and power output in braking process, can realize with smaller
Input power realizes braking.
Above-mentioned braking system, to brake pedal, either brake handle applies input power brake pedal or brake handle band
Dynamic drag-line directly provides brake force for second brake, and due to the active force and reaction force of brake cable, brake cable pulls
Universal driving shaft or crust promote universal driving shaft, so as to promote input pushing block by push rod, provide brake force for the first brake, work as connection
When the thrust that moving axis provides is more than second piston and works independently, increase at this time for the brake force that the first brake provides.
Description of the drawings
Fig. 1 is the diagrammatic cross-section one of the type variable hydraulic cylinder described in the embodiment of the present invention；
Fig. 2 is the close-up schematic view of Fig. 1；
Fig. 3 is the diagrammatic cross-section two of the type variable hydraulic cylinder described in the embodiment of the present invention；
Fig. 4 is the working curve diagram of the type variable hydraulic cylinder described in the embodiment of the present invention；
Fig. 5 is the schematic diagram of the braking system described in the embodiment of the present invention；
Fig. 6 is the braking effect figure of the braking system described in the embodiment of the present invention.
Reference sign：
1st, type variable hydraulic cylinder, 2, universal driving shaft, 3, brake cable, the 4, first brake, 5, second brake, 6, braking
Pedal, 7, push rod, 71, cut somebody's hair, 8, crust, 9, brake handle, 10, first piston, 11, oil passage, the 12, first accumulator,
13rd, the second accumulator, the 110, first oilhole, the 120, second oilhole, 20, second piston, 21, pressing plate, the 30, first spring, 40,
Two springs, 50, input pushing block, 51, washer, the 52, first clamp spring, 60, housing, 61, dust cover, 62, oil connection, 63, oil can
Connector, the 64, second clamp spring, the 610, first inlet nozzle, the 620, second inlet nozzle, 630, hydraulic pressure chamber, 640, step, 70, leather cup,
81st, the first sealing ring, the 82, second sealing ring, the 83, the 3rd sealing ring, the 84, the 4th sealing ring, the 85, the 5th sealing ring, the 86, the 6th
Sealing ring, 90, clamp nut, 91, gasket, 910, groove.
Specific embodiment
As shown in Figures 1 to 3, a kind of type variable hydraulic cylinder 1, including first piston 10, second piston 20, the first spring
30th, second spring 40, input pushing block 50 and hollow housing 60, the first piston 10, second piston 20 and second spring 40
It is arranged in housing 60, and first piston 10 is set in outside second piston 20, one end of second spring 40 is connected to housing 60
Bottom wall on, the other end is connected on the lower face of first piston 10, and the lower end of first piston 10 is arranged with leather cup 70, described defeated
The middle part for entering pushing block 50 is against the upper end of second piston 20, and one end of first spring 30 is connected to the upper end of first piston 10
On face, the other end is connected to the side of the input pushing block 50, the outer wall of the second piston 20 and 10 inner wall of first piston it
Between offer oil passage 11, offer the first oilhole 110 through its side wall, the second oilhole 120 on first piston 10, second
The first sealing ring 81 is arranged with outside piston 20, it is close that the second sealing ring the 82, the 3rd is equipped between the housing 60 and first piston 10
Seal 83, between the first oilhole 110 and the second oilhole 120, the 3rd sealing ring 83 is located at second sealing ring 82
The upside of first oilhole 110, corresponding 60 inner wall of housing of first oilhole 110 surround the first accumulator 12, and described
Corresponding 60 inner wall of housing of two oilholes 120 surrounds the second accumulator 13, offered on the side wall of the housing 60 in it
First inlet nozzle 610 of chamber connection, the second inlet nozzle 620 for being connected with the second accumulator 13, under preset state, the first inlet nozzle
610 are located at 70 downside of leather cup, and the first oilhole 110 is connected with the second oilhole 120 by oil passage 11, first sealing ring
81 are located at the upside of oil passage 11, and when first piston 10 moves down, the volume increase of the first accumulator 12, leather cup 70 moves down stifled
Firmly the first inlet nozzle 610, the housing cavity where second spring 40 form the hydraulic pressure chamber 630 for output hydraulic pressure；When the second work
When the opposite first piston 10 of plug 20 moves down, the first sealing ring 81, which moves down, blocks the oil passage 11.
At braking initial stage, for input force on input pushing block 50, input pushing block 50 promotes the first spring 30 and the simultaneously
Two pistons 20, the first spring 30 promote first piston 10, make first piston 10 and second piston 20 simultaneously to moving down, leather cup 70 with
Move down and block the first inlet nozzle 610,60 inner cavity of housing of 70 downside of leather cup is made to generate hydraulic pressure and forms hydraulic pressure chamber 630, passes through system
Dynamic oil pipe is transferred on brake, and brake force is provided for vehicle；With the increase of input power, first piston 10 and second piston 20
It is moved together to 630 direction of hydraulic pressure chamber, the volume of the first accumulator 12 gradually increases, and the volume of the first accumulator 12 gradually increases
It can be accomplished in several ways, such as be arranged to inner walls part corresponding with 110 shift motion of the first oilhole up-small and down-big
The conical surface either cascaded surface also or on the piece housing inner wall digs different oil storage tank of volume etc., in the second accumulator 13
Hydraulic oil by oil passage 11 into the first accumulator 12, while the hydraulic pressure of hydraulic pressure chamber 630 is gradually increasing, second spring
40 are compressed, and second spring 40 gradually increases the resistance of first piston 10, when the hydraulic pressure of hydraulic pressure chamber 630 is to first piston 10
When resistance is equal to the resistance of first piston 10 plus second spring 40 on first spring 30 to the thrust of first piston 10, first lives
Fill in 10 stop motions；Input power continues to increase, and inputs pushing block 50 at this time and second piston 20 is promoted individually to be transported to 630 direction of hydraulic pressure chamber
It is dynamic, it inputs change with the lever ratio exported at this time, when continuing to input power, wherein the first sealing ring 81 is embedded second
On piston 20, moved with the movement of second piston 20, when the first sealing ring 81 is after the first oilhole 110, the first sealing ring
81 seal oil passage 11 immediately, and the hydraulic oil of the second accumulator 13 can not flow to the first accumulator 12, and housing 60 with
The second sealing ring 82, the 3rd sealing ring 83 are equipped between first piston 10, the second sealing ring 82 is located under the first oilhole 110
Side, the 3rd sealing ring 83 are located at the upside of the first oilhole 110, and the first accumulator 12 is made to form the space of a sealing, though
The hydraulic pressure of right hydraulic pressure chamber 630 continues to raise, but the first accumulator of fluid 12 can not be compressed or expanded, so first piston 10
It can not downwards or move upwards, be fixed on current location, prevent 10 return of first piston, avoid pressure release, ensure that second lives
Plug 20 continue to hydraulic pressure chamber 630 move when, in hydraulic pressure chamber 630 pressure with input power in fixed proportion.As shown in figure 4, by P=F/
S is understood, since first piston 10 and 20 diameter of second piston are different, the pressure that identical input power generates is different, therefore
Change the lever ratio of input power and power output in braking process, can realize and braking is realized with smaller input power.
As shown in Figure 1, 2, the type variable hydraulic cylinder 1 further includes clamp nut 90, and the of 110 downside of the first oilhole
One piston, 10 diameter is more than 10 diameter of first piston of 110 upside of the first oilhole, and the clamp nut is set in first piston 10
Outside, and the lower face of clamp nut 90 is against on the first piston 10 of 110 downside of the first oilhole, the outer wall and housing of clamp nut
60 inner wall connection, the lower face of clamp nut 90 dig fluted 910 with the junction of its inner wall, the 3rd sealing ring 83
It is placed in the groove 910.The outer wall of clamp nut 90 is connected through a screw thread with 60 inner wall of housing, and clamp nut 90 is first in braking
Phase pushes down first piston 10, and first piston 10 is made to be in predeterminated position, and first piston 10 is avoided to pop up housing 60.The groove
910 are arranged on the lower face of clamp nut and the junction of its inner wall, make groove 910 in inverted "L" shape structure, first by the during installation
Three sealing rings 83 are sleeved on outside first piston 10, then lock clamp nut 90, and the 3rd sealing ring 83 is embedded in the groove 910 after locking
It is interior, it is easily installed.
As shown in Figure 1, 2, the type variable hydraulic cylinder 1 further includes gasket 91, and 60 inner wall of housing is equipped with platform
Rank 640, the gasket 91 are arranged on the step 640, and the clamp nut 90 is pressed on the upper surface of the gasket 91, and
The lower face of gasket 91 is against on the first piston 10 of the downside of the first oilhole 110, under preset state, the first oilhole 110 with it is described
The inner wall of gasket 91 corresponds to, and the 91 inner wall lower end of gasket is in the up-small and down-big conical surface.Clamp nut 90 is pushed down by gasket 91
First piston 10, when under preset state, the inner wall of gasket 91 and the first oilhole 110 surround the first accumulator 12, and in gasket 91
Wall lower end is in the up-small and down-big conical surface, and when moving down first piston 10, the volume of the first accumulator 12 constantly increases.And first lives
When plug 10 moves down, the 3rd sealing ring 83 in groove 910, is not moved down by 91 /V of gasket with first piston 10, the 3rd sealing ring
83 internal diameter is smaller than the outer diameter of first piston 10, and second sealing ring 82 is embedded on the outer wall of first piston 10, with first
The movement of piston 10 and move.
As shown in Figure 1,3, the middle part of the input pushing block 50 is downwardly projecting and passes through with the upper end of the second piston 20
Be bolted, moved convenient for pushing directly on second piston 20, and step down out space for install the first spring 30, it is described second work
The lower end of plug 20 is equipped with the pressing plate 21 being attached thereto, and the side of the pressing plate 21 is against in the lower face of the first piston 10
Portion makes first piston 10 form an entirety at braking initial stage with second piston 20, exerts a force to hydraulic pressure chamber 630 by pressing plate 21.
The outer wall upper end of first piston 10 described in the present embodiment is in hierarchic structure, and the lower end of first spring 30 is against hierarchic structure
The upper end of the first piston 10 is stretched out in place, the upper end of the second piston 20, and the middle part of the input pushing block 50 stretches into first
It is connected in spring 30 with the upper end of second piston 20.It is protruded by the middle part that will input pushing block 50, and the upper end of second piston 20
The upper end of the first piston 10 is stretched out, is used so as to be formed between the side of input pushing block 50 and the upper surface of first piston 10
It sets in hierarchic structure, makes under the first spring 30 in the space for installing the first spring 30, and by the outer wall upper end of first piston 10
For end cap on first piston 10,30 upper end of the first spring is sleeved on the middle part of input pushing block 50, and the first spring 30 is avoided to slip.
As shown in Figure 1,3, the type variable hydraulic cylinder 1 further includes dust cover 61, the dust cover 61 and the shell
60 upper end of body connects, and inputs pushing block 50, first piston 10 and the upper end of second piston 20 and be respectively positioned in dust cover 61.The structure
Convenient for the installation to first piston 10, second piston 20 and first spring 30, clamp nut 90, by the way that dust cover 61 is set to be used for
Dust-proof and waterproof, dust cover 61 are fastened on housing 60.
As shown in 1 to 3, the 4th sealing ring 84 and the 5th close is additionally provided between the second piston 20 and first piston 10
Seal 85, the 4th sealing ring 84 are located at 81 upside of the first sealing ring, and the 5th sealing ring 85 is located at oil passage 11
Downside.When second piston 20 moves alone, the first sealing ring 81 is after the first oilhole 110, by setting the 4th sealing ring 84,
Make to be formed between the first piston 10 of 110 upside of the first oilhole and second piston 20 and seal, so that the first accumulator 12 into one
Step sealing, avoids pressure release, by setting the 5th sealing ring 85, makes the first piston 10 and second piston of 120 downside of the second oilhole
Sealing is formed between 20, the hydraulic oil in the second accumulator 13 is avoided to reveal.
As shown in Figure 1,5, a kind of braking system, including universal driving shaft 2, brake cable 3, the first brake 4, second brake
5 and the type variable hydraulic cylinder 1, the hydraulic pressure chamber 630 connected by oil connection 62 with the first brake 4, the shell
60 side wall of body is equipped with the oil can connector 63 connected respectively with the first inlet nozzle 610, the second inlet nozzle 620, the brake cable 3
One end be connected with second brake 5, the other end is connected with brake pedal 6, it is described input pushing block 50 pass through push rod 7 and universal driving shaft
2 one end connection, the other end of the universal driving shaft 2 is connected with brake cable 3 or the other end of universal driving shaft 2 is sleeved on braking and draws
On rope 3, and crust 8 is coated on the brake cable 3 between the second brake 5 and universal driving shaft 2, the crust 8 is against connection
On moving axis 2.The first brake 4 in the present embodiment is that front wheel brake, second brake 5 are rear wheel brakes, the first braking
Device 4 is also connected with brake handle 9, realizes further braking.According to actual demand, brake cable 3 can also be with another system
Fixed handle 9 connects, and the first brake 4 is connected with another brake pedal 6.
Hydraulic oil in oil can connector 63 enters hydraulic pressure chamber 630 through the first inlet nozzle 610, and the hydraulic pressure in hydraulic pressure chamber 630 leads to
It crosses oil connection 62 and is transferred to the first brake 4, the hydraulic oil in oil can connector 63 enters the second oil storage through the second inlet nozzle 620
Room 13.By applying input power to brake pedal 6, brake pedal 6 drives drag-line directly to provide brake force for second brake 5,
Due to the active force and reaction force of brake cable 3, brake cable 3 pulls universal driving shaft 2 or crust 8 to promote universal driving shaft 2, so as to
Input pushing block 50 is promoted by push rod 7, brake force is provided for the first brake 4, as shown in Fig. 4,6, when what universal driving shaft 2 provided pushes away
When power is more than type variable hydraulic cylinder piston work handover point, increase at this time for the brake force that the first brake 4 provides, compared to biography
System technology, general master cylinder keeps certain lever ratio in input with exporting, and the type variable hydraulic pressure described in the present embodiment
Oil cylinder 1 is inputted when input power reaches certain value can change with the lever ratio exported, can be realized with smaller input power fast
Speed braking.It will be appreciated from fig. 6 that when second piston 20 starts to work independently, front and rear formulation power distribution is transferred, and distributes to front-wheel
The brake force of brake increases.Because center of gravity moves forward during motorcycle brake, after second piston 20 works independently, front wheel brake power
It can accordingly increase, then can improve braking efficiency, improve braking deceleration, shorten braking distance, improve braking safety.One
As motorcycle preceding braking for fluid pressure type, rear braking be mechanical, and ratio valve arrangement is not suitable for situation about being roused after preceding dish, this reality
It applies the braking system described in example to adapt in motorcycle, two pistons different by switching diameter make in the range of input power
Preceding brake force ratio increases.
As shown in Figure 1,3, the end face of the input pushing block 50 away from second piston 20 is equipped with holding tank, the holding tank
Interior to be equipped with washer 51, cutting somebody's hair for the push rod 7 71 is against on the bottom wall of holding tank through washer 51, is dug on the side wall of holding tank
There is the first card slot, be equipped with the first clamp spring 52 in first card slot, first clamp spring 52 is pressed on washer 51.The push rod 7
Cutting somebody's hair for front end 71 is pressed in by the first clamp spring 52 and washer 51 on input pushing block 50, and push rod 7 is avoided to skid off dust cover 61, makes to push away
The power of bar 7 can be acted on smoothly on input pushing block 50, and it is described cut somebody's hair 71 in hemispherical, increase its connecing with input pushing block 50
Contacting surface is accumulated.
As shown in Figure 1,3, the outer wall of the housing 60 has dug mounting groove, the bottom wall of the mounting groove respectively with first into
Oil nozzle 610, the second inlet nozzle 620 connect, and the oil can connector 63 is mounted in the mounting groove, and the oil can connector 63
The 6th sealing ring 86 is equipped between outer wall and the side wall of mounting groove, the second card slot has been dug on the side wall of the mounting groove, it is described
The second clamp spring 64 is equipped in second card slot, second clamp spring 64 is pressed on the oil can connector 63.The oil can connector 63 is logical
The second clamp spring 64 is crossed to be fixed in mounting groove, by the 6th sealing ring 86, make oil can connector 63 and mounting groove side wall it
Between seal, avoid the hydraulic fluid leak of the second accumulator 13.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
Cannot the limitation to the scope of the claims of the present invention therefore be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of type variable hydraulic cylinder, which is characterized in that including first piston, second piston, the first spring, second spring,
Pushing block and hollow housing are inputted, the first piston, second piston and second spring are arranged in housing, and first piston
It is set in outside second piston, one end of second spring is connected on the bottom wall of housing, and the other end is connected to the lower end of first piston
On face, the lower end of first piston is arranged with leather cup, and the upper end of second piston, first bullet are against in the middle part of the input pushing block
One end of spring is connected on the upper surface of first piston, and the other end is connected to the side of the input pushing block, the second piston
Outer wall and first piston inner wall between offer oil passage, offered on first piston the first oilhole through its side wall,
Second oilhole, second piston are arranged with the first sealing ring outside, and the second sealing ring, the 3rd are equipped between the housing and first piston
Sealing ring, for second sealing ring between the first oilhole and the second oilhole, the 3rd sealing ring is located at the first oilhole
Upside, the corresponding inner walls of first oilhole surround the first accumulator, the corresponding housing of second oilhole
Inner wall surrounds the second accumulator, and the first inlet nozzle connected with its inner cavity and the second oil storage are offered on the side wall of the housing
Second inlet nozzle of room connection, under preset state, the first inlet nozzle is located at leather cup downside, and the first oilhole passes through with the second oilhole
Oil passage connects, and first sealing ring is located at the upside of oil passage, when first piston moves down, the appearance of the first accumulator
Product increase, leather cup, which moves down, blocks the first inlet nozzle, and the housing cavity where second spring forms the hydraulic pressure chamber for output hydraulic pressure；
When second piston is moved down with respect to first piston, the first sealing ring, which moves down, blocks the oil passage.
2. type variable hydraulic cylinder as described in claim 1, which is characterized in that it further includes clamp nut, under the first oilhole
The first piston diameter of side is more than the first piston diameter on the upside of the first oilhole, and the clamp nut is set in outside first piston,
And the lower face of clamp nut is against on the first piston on the downside of the first oilhole, the outer wall of clamp nut and the inner wall of housing connect
It connects, the lower face of clamp nut digs fluted with the junction of its inner wall, and the 3rd sealing ring is placed in the groove.
3. type variable hydraulic cylinder as claimed in claim 2, which is characterized in that it further includes gasket, in the inner walls
Equipped with step, the gasket is arranged on the step, and the clamp nut is pressed on the upper surface of the gasket, and gasket
Lower face is against on the first piston on the downside of the first oilhole, and under preset state, the first oilhole is corresponding with the inner wall of the gasket, institute
Gasket inner wall lower end is stated in the up-small and down-big conical surface.
4. type variable hydraulic cylinder as described in claim 1, which is characterized in that it is described input pushing block middle part it is downwardly projecting and
It is connected with the upper end of the second piston, the lower end of the second piston is equipped with the pressing plate being attached thereto, the side of the pressing plate
It is against in the middle part of the lower face of the first piston.
5. type variable hydraulic cylinder as claimed in claim 4, which is characterized in that the outer wall upper end of the first piston is in ladder
Structure, the lower end of first spring are against at hierarchic structure, and the upper of the first piston is stretched out in the upper end of the second piston
It holds, stretches into the first spring in the middle part of the input pushing block and be connected with the upper end of second piston.
6. such as type variable hydraulic cylinder described in any one of claim 1 to 5, which is characterized in that it further includes dust cover, described
Dust cover is connected with the housing upper end, and the upper end for inputting pushing block, first piston and second piston is respectively positioned in dust cover.
7. such as type variable hydraulic cylinder described in any one of claim 1 to 5, which is characterized in that the second piston and first
It is additionally provided with the 4th sealing ring and the 5th sealing ring between piston, the 4th sealing ring is located on the upside of the first sealing ring, and described the
Five sealing rings are located at the downside of oil passage.
8. a kind of braking system, which is characterized in that including universal driving shaft, brake cable, the first brake, second brake and power
Profit requires 1 to 7 any one of them type variable hydraulic cylinder, and the hydraulic pressure chamber is connected by oil connection with the first brake,
The housing sidewall is equipped with the oil can connector that is connected respectively with the first inlet nozzle, the second inlet nozzle, and the one of the brake cable
End is connected with second brake, and the other end is connected with brake pedal or brake handle, and the input pushing block passes through push rod and linkage
One end connection of axis, the other end of the universal driving shaft is connected with brake cable or the other end of universal driving shaft is sleeved on brake cable
On, and crust is coated on the brake cable between the second brake and universal driving shaft, the crust is against on universal driving shaft.
9. braking system as claimed in claim 8, the end face of the input pushing block away from second piston is equipped with holding tank, institute
It states and washer is equipped in holding tank, cutting somebody's hair for the push rod is against on the bottom wall of holding tank through washer, is dug on the side wall of holding tank
Equipped with the first card slot, the first clamp spring is equipped in first card slot, first clamp spring is pressed on washer.
10. braking system as claimed in claim 9, the outer wall of the housing has dug mounting groove, the bottom wall of the mounting groove
It is connected respectively with the first inlet nozzle, the second inlet nozzle, the oil can connector is mounted in the mounting groove, and the oil can connector
Outer wall and mounting groove side wall between be equipped with the 6th sealing ring, dug the second card slot on the side wall of the mounting groove, it is described
The second clamp spring is equipped in second card slot, second clamp spring is pressed on the oil can connector.
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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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN105564398A CN105564398A (en) | 2016-05-11 |
| CN105564398B true CN105564398B (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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| CN105564398A (en) | 2016-05-11 |
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