CN107387538A - A kind of rcm connecting-rod connecting device - Google Patents
A kind of rcm connecting-rod connecting device Download PDFInfo
- Publication number
- CN107387538A CN107387538A CN201710612827.1A CN201710612827A CN107387538A CN 107387538 A CN107387538 A CN 107387538A CN 201710612827 A CN201710612827 A CN 201710612827A CN 107387538 A CN107387538 A CN 107387538A
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- CN
- China
- Prior art keywords
- piston
- rod
- splined shaft
- rcm
- piston rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/06—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compressor (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a kind of rcm connecting-rod connecting device, including fuel compression piston rod fuel compression piston rod and driving piston rod, the fuel compression piston rod fuel compression piston rod is connected with driving piston rod by attachment means；The attachment means include connection piston and splined shaft, and the connection piston and splined shaft are snapped together, and connection piston and splined shaft can be mutually shifted in connected state.Fuel is compressed into piston rod fuel compression piston rod by attachment means by the present invention and driving piston rod is flexibly connected, make fuel compression piston rod fuel compression piston rod in assembling and drive the installation site automatic adjusument of piston rod, the machining accuracy of two connecting rods and the coaxial accuracy requirement when two connecting rods assemble are reduced, saves production cost.
Description
【Technical field】
The present invention relates to fuel fire, Chemical Kinetics experimental provision, energetic material impact, hot loading experiment dress
Put, engine compression strokes simulation is atomized the fields such as ignition test device, more particularly to a kind of Fast Compression with fuel visualization
Machine connecting-rod connecting device.
【Background technology】
Widely used rcm structure is the piston structure of double link three in the world, including two connecting rods, driving are lived
Plug, deceleration piston and fuel compression piston；Wherein, two connecting rods are fixedly connected by a connection piston, drive piston and combustion
Material compression piston is connected to the both ends of two connecting rods, and total is linearly set, and the direction of motion is axial movement.
Being fixedly connected using threaded connection between traditional connecting rod of rcm two, sets respectively in one end of two connecting rods
A screwed hole is put, is connected two connecting rods by a stud, connection piston is arranged on the middle part of double thread.Or
One bolt is set respectively at the both ends of connection piston, is solidly connected two by the bolt at deceleration piston both ends.
Because the piston and connecting rod of rcm quickly move, average speed is up to 20m/s, and two connecting rod total lengths
Longer to be more than 2m, the axiality problem of two connecting rods is the technical difficult points of the equipment, to the installation accuracies of two connecting rods and plus
The requirement of work precision is high.Due to being connected between two connecting rods using being screwed, the concentricity of rear two connecting rods is fixedly connected with
Easily there is deviation, cause the movement velocity of rcm not reach requirement of experiment, and due to the axiality of two connecting rods
Difference, cylinder body easily causes to damage to connecting rod during motion, causes the inoperable serious problems of rcm.
In view of the above-mentioned problems, real be necessary to design a kind of design attachment means, solve two connecting rods connect two connecting rods because
Axiality difference causes the problem of many.
【The content of the invention】
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that provide a kind of fast ram compression
Contracting machine connecting-rod connecting device, the attachment means are simple in construction and improve the stability and service life of connecting rod connection.
A kind of rcm connecting-rod connecting device, including connection piston and splined shaft；The connection piston is lived with driving
Connecting rod connection is filled in, splined shaft is connected with fuel compression piston rod, and splined shaft is arranged in connection piston cavity, splined shaft and company
Connect the radial and axial of piston inner wall and leave gap, the gap is used to adjust fuel compression piston rod and driving piston connects
The axiality of bar and corresponding cylinder body.
The connection piston and splined shaft snap together.
The splined shaft includes flower keyboard and multiple spline tooths, and the multiple spline tooth is arranged on flower keyboard.
Multiple snapping boss, the sky between snapping boss and piston cavity bottom are set on the madial wall of the connection piston
Between be keyway, the flower keyboard is arranged in keyway, and the flower keyboard can move in keyway.
The connection piston is the hollow cone of one end closing, and multiple snapping boss, which are divided equally, is arranged on same circumferential section
On.
The radial clearance is 0.5~2mm；Axial gap is 0.5~2mm.
The end set of the splined shaft has the boss for bearing connection piston slap power.
The boss is round boss, the half of a diameter of flower keyboard diameter of the round boss.
The height of the round boss is 1/5th of flower keyboard height.
The splined shaft also includes the first connecting shaft, and splined shaft is fixed with fuel compression piston rod by the first connecting shaft
Connection；Also include the second connecting shaft on the connection piston, connection piston is fixed with driving piston rod by the second connecting shaft
Connection.
Compared with prior art, the present invention at least has the advantages that：
1st, two connecting rods of rcm are movably connected by the present invention by connecting piston and splined shaft, and are made
Fuel compresses piston rod and relative displacement can occur in a coupled condition for driving piston rod, and then makes combustion in assembling
Expect compression piston connecting rod and drive the installation site automatic adjusument of piston rod, ensure that the axiality of connecting rod and cylinder body, drop
The machining accuracy of low two connecting rods and the coaxial accuracy requirement when two connecting rods assemble, avoid cylinder body to connecting rod
Damage, saves production cost.
2nd, boss is hit by being set on splined shaft, hits boss and locally thickeied the position that splined shaft receives to hit,
The intensity of splined shaft is improved, connection piston is impinged upon to the impulsive force of splined shaft and is limited on boss, is avoided because of two
The self-regulation of connecting rod position and cause the application point for connecting piston impact power to be distributed to the more weak edge of flower keyboard, improve
The service life of splined shaft；The mobile space that boss also reduces connection piston and splined shaft is hit simultaneously, reduces rcm
Impulsive force of the piston to splined shaft is connected during motion；Secondly, the reduction of mobile space also shortens connection piston to splined shaft
The time of high-frequency reciprocating impact, avoid the problem of splined shaft is easily broken off by impulsive force and high-frequency reciprocating impact, the company of raising
The service life of connection device.
【Brief description of the drawings】
Fig. 1 is rcm structural representation；
Fig. 2 is the structural representation of attachment means；
Fig. 3 is the front view for connecting piston；
Fig. 4 is the left view for connecting piston；
Fig. 5 is the front view of spline；
Fig. 6 is the left view of spline；
【Embodiment】
The present invention proposes a kind of rcm attachment means, solves concentric because of two connecting rods in rcm
Degree problem causes the problem of two connecting rod damages, improves the stability of rcm operation.
Refer to shown in Fig. 1, the mechanism of the rcm includes driving piston, fuel compression piston rod 1, driving work
Fill in connecting rod 2, fuel compression piston；Wherein, drive piston and drive one end of piston rod 2 to be connected, drive the another of piston rod 2
One end that one end compresses piston rod 1 by attachment means and fuel is flexibly connected, the other end of fuel compression piston rod 1 and
Fuel compression piston connects.Fuel compression piston rod 1 be connecting rod be connected with fuel compression piston, drive piston rod be with
Drive the connecting rod of piston connection.
As shown in Fig. 2 attachment means include connection piston 3 and splined shaft 4；Splined shaft 4 is interior positioned at the connection cavity of piston 3
Portion, splined shaft 4 snap together with being connected piston 3, splined shaft (4) be connected piston (3) inwall it is radial and axial leave between
Gap, splined shaft 4 can be moved in the cavity of connection piston 3, and connection piston 3 is connected by screw thread with driving piston rod 2, flower
Key axle 4 compresses piston rod 1 with fuel by screw thread and is connected.
As shown in figure 3, the connection piston 3 is the hollow cone of one end closing, the outer face center of connection piston 3 is set
The second connecting shaft 3-1 is equipped with, screw thread is provided with the second connecting shaft, connecting there are the multiple snappings of interval setting convex on the inwall of piston 3
Platform 3-2, multiple snapping boss 3-2 intervals are uniformly distributed on same circumferential section, the bottom surface of connection piston 3 inner chamber with it is multiple
Keyway 3-3 is formed between snapping boss 3-2；Connection piston 3 is integrated machine-shaping.The preferred 46mm of the connection internal diameter of piston 3；
The fan-shaped boss is 2-8, preferably 4；Keyway 3-4 width is preferably 5-15mm, preferably 12mm.
As shown in figure 4, splined shaft 4 is T-type structure, splined shaft 4 includes flower keyboard 4-2 and is connected to the of flower keyboard one end
One connecting shaft 4-1, set on flower keyboard uniform intervals that multiple spline tooth 4-3 are set, the space between adjacent spline tooth 4-3 is flower
Keyway, is provided with round boss 4-4 on flower keyboard 4-2 other end center, and the 1/2 of a diameter of flower keyboard of boss, it is highly excellent
Select 1mm；Splined shaft 4 is integrated machine-shaping.The diameter of the flower keyboard 4-2 is less than keyway 3-3 internal diameter, preferably 45mm；
The height of flower keyboard is less than keyway 3-3 width, preferably 10mm；The size and quantity of the spline are with being connected snapping in piston
Boss 3-2 quantity and size is adapted.
Fuel compresses piston rod 1 and drives one end of piston rod 2 to be respectively arranged with screwed hole, connecting rod 1 and splined shaft 4
It is connected through a screw thread, driving piston rod 2 and connection piston 3 are connected through a screw thread；Then it is the spline on flower keyboard 4-2 is suitable
The snapping boss 3-2 in the connection cavity of piston 3 and load connection piston base, treat that flower keyboard 4-2 is entirely enclosed in connection piston
In keyway 3-3, connecting shaft is then rotated 45 °, spline tooth 4-3 is overlapped with the snapping boss 3-2 being connected in piston, i.e. connection is lived
Plug is completed with connecting shaft snapping.
First, the fuel of rcm is compressed piston rod 1 and driving piston rod 2 by the present invention by attachment means
It is movably connected, because flower keyboard 4-2 diameter and height are all slightly less than the keyway 3-3 of connection connection piston, flower keyboard
4-2 and keyway 3-3 have gap radial and axial, can connect fuel pressure contracting piston rod 1 and driving piston rod 2
In the state of occur relative displacement, and then fuel compression piston rod 1 and drive piston rod 2 to be each connected with it in assembling
The axiality automatic adjusument of cylinder body, reduce the machining accuracy of two connecting rods and the axiality essence when two connecting rods assemble
Degree requires.Secondly as mobile space, when rcm starts, connection are provided between splined shaft 4 and connection piston 3
Piston 3 can produce impulsive force to splined shaft 4, at the same impulsive force can cause to connect produced between piston 3 and splined shaft 4 it is high-frequency
Reciprocating impact, attachment means can be caused to damage.The present invention is further provided for bearing the boss 4- of impact on splined shaft 4
4, when fuel, which compresses, to be relatively moved between piston rod 1 and driving piston rod 2, between splined shaft 4 and connection piston 3
Activity surplus radially gradually increase, the boss 4-4 on splined shaft 4 will not reduce the activity surplus between connecting rod,
While ensureing regulation surplus, reduce splined shaft 4 and connect the gap between piston 3, the reduction in gap can greatly drop
Impact of the piston 3 to splined shaft 4 is connected when low rcm starts, at the same also reduce splined shaft 3 bear dither when
Between, avoid splined shaft 3 and be easily broken off by impulsive force and high-frequency reciprocating impact, improve the service life of splined shaft 3；Separately
Outside, round boss 4-4 has locally thickeied the position that splined shaft 4 receives to hit, and improves the intensity of splined shaft 4, and boss 4-4 will connect
Take over a job plug 3 pairs of splined shafts 4 impulsive force be limited on boss 4-4, avoid because fuel compression piston rod 1 and driving piston connect
Bar 2 is self-regulated and causes impact force action point to be distributed to the more weak edges of flower keyboard 4-2, further increases splined shaft 4
Service life.
The technological thought of above content only to illustrate the invention, it is impossible to protection scope of the present invention is limited with this, it is every to press
According to technological thought proposed by the present invention, any change done on the basis of technical scheme, claims of the present invention is each fallen within
Protection domain within.
Claims (10)
- A kind of 1. rcm connecting-rod connecting device, it is characterised in that：Including connection piston (3) and splined shaft (4)；The company Plug (3) of taking over a job is connected with driving piston rod (2), and splined shaft (4) is connected with fuel compression piston rod (1), and splined shaft (4) is set It is placed in connection piston (3) cavity, splined shaft (4) leaves gap with being connected the radial and axial of piston (3) inwall, between described Gap is used for the axiality for adjusting fuel compression piston rod (1) and driving piston rod (2) and corresponding cylinder body.
- A kind of 2. rcm connecting-rod connecting device according to claim 1, it is characterised in that：The connection piston (3) snapped together with splined shaft (4).
- A kind of 3. rcm connecting-rod connecting device according to claim 1, it is characterised in that：The splined shaft (4) Including flower keyboard (4-2) and multiple spline tooths (4-3), the multiple spline tooth (4-3) is arranged on flower keyboard (4-2).
- A kind of 4. rcm connecting-rod connecting device according to claim 3, it is characterised in that：The connection piston (3) multiple snapping boss (3-2) are set on madial wall, and the space between snapping boss and piston cavity bottom is keyway (3- 3), the flower keyboard (4-2) is arranged in keyway (3-3), the flower keyboard (4-2) and the radial direction and axle of keyway (3-3) inwall To leaving gap.
- A kind of 5. rcm connecting-rod connecting device according to claim 4, it is characterised in that：The connection piston (3) it is the hollow cone of one end closing, multiple snapping boss (3-2), which are divided equally, to be arranged on same circumferential section.
- A kind of 6. rcm connecting-rod connecting device according to claim 1, it is characterised in that：The radial clearance is 0.5~2mm；Axial gap is 0.5~2mm.
- A kind of 7. rcm connecting-rod connecting device according to claim 1 or 3, it is characterised in that：The splined shaft (4) end set has the boss (4-4) for bearing connection piston (3) impact.
- A kind of 8. rcm connecting-rod connecting device according to claim 7, it is characterised in that：The boss (4-4) For round boss, the half of a diameter of flower keyboard diameter of the round boss.
- A kind of 9. rcm connecting-rod connecting device according to claim 8, it is characterised in that：The round boss Highly it is 1/5th of flower keyboard height.
- A kind of 10. rcm connecting-rod connecting device according to claim 1, it is characterised in that：The splined shaft (4) The first connecting shaft (4-1) is also associated with, splined shaft (4) is fixed by the first connecting shaft (4-1) with fuel compression piston rod (1) Connection；The second connecting shaft (3-1) is also associated with the connection piston (3), connection piston (3) is logical with driving piston rod (2) The second connecting shaft (3-1) is crossed to be fixedly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710612827.1A CN107387538B (en) | 2017-07-25 | 2017-07-25 | Connecting rod connecting device of rapid compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710612827.1A CN107387538B (en) | 2017-07-25 | 2017-07-25 | Connecting rod connecting device of rapid compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107387538A true CN107387538A (en) | 2017-11-24 |
| CN107387538B CN107387538B (en) | 2020-05-22 |
Family
ID=60336191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710612827.1A Active CN107387538B (en) | 2017-07-25 | 2017-07-25 | Connecting rod connecting device of rapid compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107387538B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3805552A (en) * | 1972-10-17 | 1974-04-23 | Atomic Energy Commission | Radial spline guide bearing assembly |
| GB2031553A (en) * | 1978-09-08 | 1980-04-23 | Wilson H | Sliding joint for vehicle propeller shafts |
| US6033310A (en) * | 1998-04-20 | 2000-03-07 | The Cline Company | Variable length drive shaft |
| JP2008207575A (en) * | 2007-02-23 | 2008-09-11 | Toyota Motor Corp | Vehicular propulsion shaft |
| CN105398490A (en) * | 2011-03-18 | 2016-03-16 | 株式会社捷太格特 | Manufacturing Method For Power Transmission Shaft And Vehicle Steering Device |
-
2017
- 2017-07-25 CN CN201710612827.1A patent/CN107387538B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3805552A (en) * | 1972-10-17 | 1974-04-23 | Atomic Energy Commission | Radial spline guide bearing assembly |
| GB2031553A (en) * | 1978-09-08 | 1980-04-23 | Wilson H | Sliding joint for vehicle propeller shafts |
| US6033310A (en) * | 1998-04-20 | 2000-03-07 | The Cline Company | Variable length drive shaft |
| JP2008207575A (en) * | 2007-02-23 | 2008-09-11 | Toyota Motor Corp | Vehicular propulsion shaft |
| CN105398490A (en) * | 2011-03-18 | 2016-03-16 | 株式会社捷太格特 | Manufacturing Method For Power Transmission Shaft And Vehicle Steering Device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107387538B (en) | 2020-05-22 |
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