CN207500368U - A kind of camshaft speed hydraulic pressure attenuator - Google Patents
A kind of camshaft speed hydraulic pressure attenuator Download PDFInfo
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- CN207500368U CN207500368U CN201721504206.3U CN201721504206U CN207500368U CN 207500368 U CN207500368 U CN 207500368U CN 201721504206 U CN201721504206 U CN 201721504206U CN 207500368 U CN207500368 U CN 207500368U
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- cylinder
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- throttle
- piston
- camshaft
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Abstract
The utility model provides a kind of camshaft speed hydraulic pressure attenuator, belongs to wheeled vehicle braking technology field.Including camshaft and cam, one end of camshaft is connect with original machine output shaft by shaft coupling, and the first cam and the second cam of carrier phase shift 180 degree is equipped in the middle part of camshaft；The lower face contact of the wheel rim piston of cam, first piston, second piston lower end of the upper surface respectively with the first buffer spring, the second buffer spring fix, inner surface of the upper end respectively with the first cylinder, the second cylinder head is fixed, the center of second cylinder head is equipped with discharge orifice, the hole is connected by leak-off pipe with the discharge orifice of the first cylinder head, aerial drainage solenoid valve is equipped in the middle part of leak-off pipe, second cylinder head is equipped with throttle orifice, the hole is connected by throttle pipe with the throttle orifice of the first cylinder head, and the middle part of throttle pipe is equipped with throttle solenoid valve；First cylinder with it is hydraulically full in the second cylinder and the leak-off pipe communicated therewith and the space of throttle pipe.
Description
Technical field
The utility model belongs to hydraulic drive field.
Background technology
1182842 utility model patent of publication number " friction free speed-reducing brake for mechanical rotation movement ", which proposes, a kind of uses liquid
The scheme of body damping force brake rotation shaft, hydraulic oil is filled in housing cavity, and hydraulic pressure is controlled by the cam mechanism of a set of complexity
The flow of oil.Fluid damping power is better than friction catch for braking.
Axle or prime mover connection of wheeled vehicle can provide the braking of rotating speed hydraulic pressure attenuation type, with friction eceleration mode of braking
The operation security of common protection vehicle.Particularly on continuous long heavy down grade, friction brake works long hours easy failure
Disaster is caused, is computed not considering that comfort level can realize parking in relatively short distance.
In order to overcome existing friction catch mode at work because temperature raising causes brake failure to lead to a disaster, provide
A kind of fluid damping dynamic braking mode, braking process do not generate friction and high temperature, improve reliability and safety.
Utility model content
The purpose of this utility model is to provide a kind of camshaft speed hydraulic pressure attenuator, it can efficiently solve friction catch
High temperature is led to the problem of in the process.
The purpose of this utility model is achieved through the following technical solutions：A kind of camshaft speed hydraulic pressure attenuator,
Including camshaft and cam, one end of camshaft is connect with original machine output shaft by shaft coupling, and phase is equipped in the middle part of camshaft
Angle differs the first cam and the second cam of 180 degree；First cam, the second cam wheel rim respectively with second piston, first live
The lower face contact of plug, first piston, second piston the upper surface lower end with the first buffer spring, the second buffer spring respectively
It is fixed, the first buffer spring, the second buffer spring inner surface of the upper end respectively with the first cylinder, the second cylinder head fix,
Second cylinder head is equipped with the second discharge orifice, which is connected by leak-off pipe with the first discharge orifice of the first cylinder head, aerial drainage
Aerial drainage solenoid valve is equipped in the middle part of pipe, the second cylinder head is equipped with the second throttle orifice, which passes through throttle pipe and the first cylinder head
The connection of first segment discharge orifice, the middle part of throttle pipe is equipped with throttle solenoid valve；First cylinder and the second cylinder and what is communicated therewith let out
It is hydraulically full in the space of flow tube and throttle pipe, it is equipped with steel wire rope across the camshaft both sides of two cams.
First discharge orifice of first cylinder is connected with the second discharge orifice of the second cylinder by leak-off pipe, in leak-off pipe
Put aerial drainage solenoid valve.
The first segment discharge orifice of first cylinder is connected with the second throttle orifice of the second cylinder by throttle pipe, in throttle pipe
Put throttle solenoid valve.
The first piston bottom is contacted with the second cam higher pair；
The second piston bottom is contacted with the first cam higher pair；
First buffer spring is located between first piston and the first cylinder top.
Second buffer spring is located between second piston and the second cylinder top.
Compared with prior art, the utility model is simple in structure, compact, and braking is steady, has a wide range of application.The utility model
Piston engine is derived from, piston seal technology maturation, manufacturing equipment and technique are general, therefore the industrialization of the utility model is very
Easily.The utility model has made innovative design to the structure of reciprocating-piston engine, uses double-cylinder structure.Cancel the list of cylinder head
Solely design, processing, cylinder head is integrated with cylinder to process, and bigbore discharge orifice and small-bore section are only offered in cylinder head
Discharge orifice.The discharge orifice of two cylinders is connected by solenoid valve control, and discharge orifice is normally on, and throttle orifice passes through solenoid valve control
Aperture adjusts flow.Hydraulically full between piston and cylinder, the piston phase angles of two cylinders is 180 degree, when discharge orifice is connected without
Damping force, when aerial drainage bore closure, generate damping force, damping force size by throttle orifice electromagnetism valve regulation.In the convex of the utility model
Lay winding wire ropes are exactly an aircraft arrestment on wheel shaft trunnion, and structure is simpler than U.S.'s active service MK7-3 stopping devices.
Description of the drawings
1 structure diagram of Fig. 1 the utility model embodiments；
2 structure diagram of Fig. 2 the utility model embodiments；
3 structure diagram of Fig. 3 the utility model embodiments.
Specific embodiment
In order to further appreciate that the contents, features and effects of the utility model, following embodiment is hereby enumerated, and coordinate attached drawing
Detailed description are as follows：
Embodiment 1, referring to Fig. 1, a kind of camshaft speed hydraulic pressure attenuator, including piston, cylinder, camshaft, buffering
Spring, solenoid valve；
First cylinder, 5 top and 17 top of the second cylinder open up bigbore first discharge orifice 8, the second discharge orifice 15 respectively
With small-bore first segment discharge orifice 9, the second throttle orifice 14；
First discharge orifice 8 of the first cylinder 5 is connected with the second discharge orifice 15 of the second cylinder 17 by leak-off pipe 12, aerial drainage
Aerial drainage solenoid valve 11 built in pipe 12；
The first segment discharge orifice 9 of first cylinder 5 is connected with the second throttle orifice 14 of the second cylinder 17 by throttle pipe 13, throttling
Throttle solenoid valve 10 built in pipe 13；
There are two the first cam 2, the second cams 3 of carrier phase shift 180 degree for camshaft 1；
4 bottom of first piston is contacted with 3 higher pair of the second cam；
18 bottom of second piston is contacted with 2 higher pair of the first cam；
First piston 4 freely slides on 5 inner wall of the first cylinder；
Second piston 18 freely slides on 17 inner wall of the second cylinder；
First buffer spring 7 is located between 4 and first cylinder of first piston, 5 top；
Second buffer spring 16 is located between 18 and second cylinder of second piston, 17 top；
First piston 4, the top dead-centre of second piston 18 and the first cylinder 5,17 top of the second cylinder distance be more than first
The reduction length of buffer spring 7, the second buffer spring 16；
Between 4 and first cylinder of first piston, 5 top, hydraulically full 6 between 18 and second cylinder of second piston, 17 top,
Hydraulically full 6 among leak-off pipe 12, throttle pipe 13；
The trunnion of the camshaft 1 of the utility model is connected on the axle of wheeled vehicle, and aerial drainage solenoid valve 11 is opened, liquid
Body 6 can be flowed freely between the first cylinder 5 and the second cylinder 17 without generating damping force, and the first buffer spring 7 and second is slow
It rushes 16, spring and plays cushioning effect without absorbing any energy.With the rotation of camshaft 1, the second cam 3 driving first is lived
Plug 4 moves up and down in the first cylinder 5, and the first cam 2 driving second piston 18 moves up and down in the second cylinder 17, the two phase
Bearing difference 180 degree, so as to which liquid 6 be pushed to be moved back and forth between the first cylinder 5 and the second cylinder 17.When braking, it first closes
Aerial drainage solenoid valve 11 is closed, since the orifice restriction effect of first segment discharge orifice 9, the second throttle orifice 14 generates damping force, is hindered for increase
Buddhist nun's power, throttle solenoid valve 10 progressively close off within several seconds, and attenuation is achieved in friction-free braking to axle rotating speed rapidly.
For wheeled vehicle, the utility model can provide the braking of rotating speed hydraulic pressure attenuation type, the damping generated by aperture
Power size is easy to control；Friction brake force is difficult to control, because friction coefficient is affected by many factors, such as humidity, speed.This practicality
It is novel provide lasting damping force control long heavy down grade speed be allowed to average rate traveling, form bulk production with friction catch mode
The double insurance of vehicle, motor bus.
Embodiment 2, referring to Fig. 2, increasing steel wire rope 19, prime mover 20 than embodiment 1.
Steel wire rope 19 is wrapped on camshaft 1, and 20 main shaft of prime mover is connected on camshaft 1.Original state, aerial drainage electromagnetism
Valve 11 is closed, throttle solenoid valve 10 is opened, and each component of the utility model is in static.After aircraft hooks steel wire rope 19, steel wire rope
19 drive camshafts 1 rotate, and first piston 4, second piston 18, which move up and down, pushes liquid 6 to move back and forth production in throttle pipe 13
Raw damping force, to increase damping force, throttle solenoid valve 10 progressively closed off to compel grounding machine within several seconds.Steel wire rope 19 is detached from
It after aircraft, opens aerial drainage solenoid valve 11 and eliminates damping force, open prime mover 20 and camshaft 1 is driven to reversely rotate, 19 quilt of steel wire rope
It rewinds on camshaft 1, closes aerial drainage solenoid valve 11, opening throttle solenoid valve 10 starts to block next time.
The utility model is as stopping device, and structure is simpler than U.S.'s active service MK7-3 stopping devices, steel wire rope and pulley dosage
It is few.The stroke of the main hydraulic cylinder of MK7-3 stopping devices is limited, and a large amount of pulley and steel wire rope has been used to realize 18:1 winding ratio, this
Sample can extract longer cable wire out the stroke that length is converted into smaller main hydraulic cylinder.The utility model is decayed winged in a rotative pattern
Machine speed, as long as therefore steel wire rope long enough, pull-out distance is unlimited, uses more flexible, does not need to determining for MK7-3 stopping devices
Length washes away valve and accurately controls pull-out distance.
Embodiment 3, referring to Fig. 3, increasing component 21 than embodiment 1, component 21 is identical with embodiment 1, component
21 are completely superposed about 1 antisymmetry of embodiment, the camshaft 1 of the two.Under the same operating mode of total damping power, the first cylinder 5,
Small in the built-in pressure ratio embodiment 1 of two cylinders 17, then liquid is not easy to reveal.
In all dynamic seal structures, sealing effect between piston and cylinder is best, easy to maintenance, maintenance is held
Easily.The utility model has used for reference piston engine structure, and to give top priority to what is the most important, piston ring is not independent as the component part of piston
It lists and is not offered as not having.Because not needing to processing combustion chamber, the structure of cylinder head is very simple, therefore cylinder head makes one with cylinder
Body simplifies structure.
Claims (8)
1. a kind of camshaft speed hydraulic pressure attenuator, including camshaft (1) and cam, one end of camshaft (1) and prime mover
(20) output shaft is connected by shaft coupling, it is characterised in that：First that carrier phase shift 180 degree is equipped in the middle part of camshaft (1) is convex
Take turns (2) and the second cam (3)；First cam (2), the second cam (3) wheel rim respectively with second piston (18), first piston
(4) lower face contact, first piston (4), second piston (18) upper surface respectively with the first buffer spring (7), second slow
The lower end for rushing spring (16) is fixed, the first buffer spring (7), the second buffer spring 16 upper end respectively with the first cylinder (5),
Inner surface at the top of two cylinders (17) is fixed, and the second discharge orifice (15) is equipped at the top of the second cylinder (17), which passes through leak-off pipe
(12) it is connected with the first discharge orifice (8) at the top of the first cylinder (5), aerial drainage solenoid valve (11) is equipped in the middle part of leak-off pipe (12), the
The second throttle orifice (14) is equipped at the top of two cylinders (17), which passes through the first segment at the top of throttle pipe (13) and the first cylinder (5)
Discharge orifice (9) connects, and the middle part of throttle pipe 13 is equipped with throttle solenoid valve (10)；First cylinder (5) and the second cylinder (17) and and its
Liquid (6) is equipped in the leak-off pipe (12) of connection and the space of throttle pipe (13).
2. a kind of camshaft speed hydraulic pressure attenuator according to claim 1, it is characterised in that：First cylinder (5)
The first discharge orifice (8) connected with the second discharge orifice (15) of the second cylinder (17) by leak-off pipe (12), in leak-off pipe (12)
Put aerial drainage solenoid valve (11).
3. a kind of camshaft speed hydraulic pressure attenuator according to claim 1, it is characterised in that：First cylinder (5)
First segment discharge orifice (9) connected with the second throttle orifice (14) of the second cylinder (17) by throttle pipe (13), in throttle pipe (13)
Put throttle solenoid valve (10).
4. a kind of camshaft speed hydraulic pressure attenuator according to claim 1, it is characterised in that：The first piston (4)
Bottom is contacted with the second cam (3) higher pair.
5. a kind of camshaft speed hydraulic pressure attenuator according to claim 1, it is characterised in that：The second piston (18)
Bottom is contacted with the first cam (2) higher pair.
6. a kind of camshaft speed hydraulic pressure attenuator according to claim 1, it is characterised in that：First buffer spring
(7) between first piston (4) and the first cylinder (5) top.
7. a kind of camshaft speed hydraulic pressure attenuator according to claim 1, it is characterised in that：Second buffer spring
(16) between second piston (18) and the second cylinder (17) top.
8. a kind of camshaft speed hydraulic pressure attenuator according to claim 1, it is characterised in that：The camshaft (1) two
Side is equipped with steel wire rope (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721504206.3U CN207500368U (en) | 2017-11-13 | 2017-11-13 | A kind of camshaft speed hydraulic pressure attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721504206.3U CN207500368U (en) | 2017-11-13 | 2017-11-13 | A kind of camshaft speed hydraulic pressure attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207500368U true CN207500368U (en) | 2018-06-15 |
Family
ID=62503897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721504206.3U Expired - Fee Related CN207500368U (en) | 2017-11-13 | 2017-11-13 | A kind of camshaft speed hydraulic pressure attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207500368U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806483A (en) * | 2017-11-13 | 2018-03-16 | 西南交通大学 | A kind of camshaft speed hydraulic pressure attenuator |
-
2017
- 2017-11-13 CN CN201721504206.3U patent/CN207500368U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107806483A (en) * | 2017-11-13 | 2018-03-16 | 西南交通大学 | A kind of camshaft speed hydraulic pressure attenuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180615 Termination date: 20201113 |
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| CF01 | Termination of patent right due to non-payment of annual fee |