CN110258257A - A kind of sub-material rod structure and the paver for installing it - Google Patents
A kind of sub-material rod structure and the paver for installing it Download PDFInfo
- Publication number
- CN110258257A CN110258257A CN201910573791.XA CN201910573791A CN110258257A CN 110258257 A CN110258257 A CN 110258257A CN 201910573791 A CN201910573791 A CN 201910573791A CN 110258257 A CN110258257 A CN 110258257A
- Authority
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- China
- Prior art keywords
- sub
- terminal pad
- bar body
- rod structure
- material bar
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000010276 construction Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
- E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
- E01C19/185—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect for both depositing and spreading-out or striking-off the deposited mixture
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The present invention discloses a kind of sub-material rod structure, including sub-material bar body and terminal pad, the unthreaded hole for installing blade and the threaded hole for installing backward vane is provided in the terminal pad, the sub-material bar body and terminal pad are using interference fit connection.Sub-material bar body and terminal pad are connected as entirety using the structure type of interference fit by the present invention, without processing keyway in sub-material bar body and terminal pad, and using after interference fit connection without welding, fewer than a conventional sub-material rod structure procedure, save the cost, the feature of environmental protection are preferable.The material distributing rod can bear bigger torque, meet the requirement of paver ultra-wide, super thick operating condition to torque well.
Description
Technical field
The present invention relates to a kind of sub-material rod structure and the pavers for installing it, belong to engineering machinery field.
Background technique
Material distributing rod is mainly used for paver class product, is conveyed material along bar direction by helical blade mounted thereto
To outer end.During construction with paving machine, when paving width, thickness increase, the load that material generates be increased dramatically, and at this moment just need
The material distributing rod that can bear large torque is wanted to meet construction requirement.
Current sub-material rod structure mainly includes sub-material bar body, terminal pad, flat key etc., in sub-material bar body and terminal pad
Be machined with keyway respectively, under the guiding and positioning function of flat key, sub-material bar body is connected with terminal pad, then sub-material bar body and
Terminal pad is welded as a whole.The material distributing rod assembly of such structure is carried by weld strength and flat key, simultaneously as keyway is cut
Heat affected area when defect and welding that weak influence and welding is easy to produce causes fertile material performance to decline, and leads to material distributing rod
Intensity is insufficient, under heavy load operating condition, is easy to produce welding bead and tears, the failure of flat key failure, or even in sub-material bar body and company
Connect the phenomenon that will appear whole fracture at the solder bond face of disk.
Summary of the invention
It is simple, easily manufactured, reliable performance that in view of the above existing problems in the prior art, the present invention provides a kind of structures
Sub-material rod structure.The present invention also provides a kind of pavers for being equipped with the sub-material rod structure.
To achieve the goals above, a kind of sub-material rod structure that the present invention uses, including sub-material bar body and terminal pad, institute
It states and is provided with the unthreaded hole for installing blade and the threaded hole for installing backward vane in terminal pad, the sub-material bar body and company
Disk is connect using interference fit connection.
As an improvement, being provided with circular mounting hole in the terminal pad, the sub-material bar body is cylindric.
As an improvement, the diameter of the sub-material bar body is greater than the diameter of terminal pad inner circular mounting hole.
As an improvement, one end of the sub-material bar body is mounted in terminal pad using interference fit, which has
Imitate length of fit L, cooperation diameter D2, external member diameter D1With matching allowance according to the requirement of construction load torque, calculate
It arrives.
As an improvement, the sub-material bar body is assemblied in terminal pad using temperature differential method or plunging.
In addition, the present invention also provides a kind of pavers for being equipped with the sub-material rod structure.
Compared with prior art, the present invention is connected as sub-material bar body and terminal pad using the structure type of interference fit
It is whole, without processing keyway in sub-material bar body and terminal pad, and using welding is not necessarily to after interference fit connection, than conventional point
Material rod structure has lacked a procedure, save the cost, and the feature of environmental protection is preferable.The material distributing rod can bear bigger torque, meet well
The requirement of paver ultra-wide, super thick operating condition to torque.
Detailed description of the invention
Fig. 1 is material distributing rod structural schematic diagram of the invention；
In figure: 1, unthreaded hole, 2, sub-material bar body, 3, terminal pad, 4, threaded hole, L, effective length of fit, D1, external member it is straight
Diameter, D2, cooperation diameter.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention is carried out below further detailed
It describes in detail bright.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, it is not limited to this hair
Bright range.
Unless otherwise defined, all technical terms and scientific terms used herein are led with technology of the invention is belonged to
The normally understood meaning of the technical staff in domain is identical, and term as used herein in the specification of the present invention is intended merely to retouch
State the purpose of specific embodiment, it is not intended that in the limitation present invention.
As shown in Figure 1, a kind of sub-material rod structure, including sub-material bar body 2 and terminal pad 3, use is provided in the terminal pad 3
Unthreaded hole 1 in installation blade and threaded hole 4 for installing backward vane, the connection of blade uses usual manner, described
Sub-material bar body 2 and terminal pad 3 are using interference fit connection.
As the improvement of embodiment, circular mounting hole is provided in the terminal pad 3, the sub-material bar body 2 is cylindric.
Realization interference fit is connect with the circular mounting hole in terminal pad 3 by columned sub-material bar body 2, and preferred, it is described
Diameter (the i.e. D of sub-material bar body 22) it is slightly larger than the diameter of 3 inner circular mounting hole of terminal pad.
As the improvement of embodiment, one end of the sub-material bar body 2 is mounted in terminal pad 3 using interference fit, should
Effective length of fit L, the cooperation diameter D of installation end2, external member diameter D1With matching allowance wanting according to construction load torque
It asks, is calculated.
As the improvement of embodiment, the sub-material bar body 2 is assemblied in terminal pad 3 using temperature differential method, using temperature differential method
When, terminal pad 3 is external member, and sub-material bar body 2 is internal member.The implementation method of temperature differential method: external member is placed in electric furnace, coal
It is heated in steam stove or hot oil；By internal member dry ice, liquid air or it is placed in cryogenic box cooling；Containing can also be heated simultaneously
Part and internal member.By external member in this example --- terminal pad is heated to 250 DEG C or so and installs.
Sub-material bar body 2 can also be assembled in terminal pad 3 using conventional method, such as indentation hair, the method technique
Simply, but matching surface is easy to damage, and weakens the tightness of connection, is suitable for magnitude of interference or the lesser occasion of size.
The present invention also provides a kind of pavers for being equipped with the sub-material rod structure.
Embodiment 1
It, can be by changing effective length of fit L respectively, matching when the requirement of the construction load of needs is T=10000N.m
Close diameter D2, external member diameter D1Realize that design requirement, specific calculation are as follows with matching allowance, wherein be related to calculating
The unit of project is respectively as follows:
Torque: N.m, diameter: mm, length of fit: mm, pressure: Mpa, magnitude of interference: mm, elasticity modulus: Mpa, surrender are strong
Degree: Mpa
Case study on implementation: effective length of fit L, cooperation diameter D2, external member diameter D1It determines, calculates matching allowance δ.
1, minimum contact pressure P needed for transmitting loadfmin
In formula: T-transmitting torque, T=10000；The effective length of fit of L-, L=170；D2- cooperation diameter, D2=
70；μ-secondary the coefficient of friction of connected piece friction, μ=0.1 (tabling look-up can obtain).
2, minimum interference amount δ needed for transmitting loademin
δemin=eamin+eimin
In formula, eaminMinimum diameter needed for-external member transmits load changes；eimin- internal member transmits needed for load
Minimum diameter variation.
2.1, minimum diameter needed for external member transmitting load changes eamin
In formula, EaThe elasticity modulus of-external member material, Ea=200000；
Wherein, qa- diameter ratio,D1- external member diameter, D1=120,
va- external member material Poisson's ratio, va=0.3.
It can be obtained by above content:
2.2, minimum diameter needed for internal member transmitting load changes eimin
In formula, EiThe elasticity modulus of-internal member material, Ei=210000；
Wherein, qi- diameter ratio,di- internal member internal diameter, internal member is solid shafting in case, is taken
di=0, therefore qi=0；vi- internal member material Poisson's ratio, vi=0.3.
It can be obtained by above content:
In conclusion minimum interference amount needed for transmitting load:
δemin=eamin+eimin=0.055
3, external member, internal member, structural member assembly do not generate the permitted maximum combined pressure P of plastic deformationfamax、
PfimaxAnd Pfmax。
3.1, external member does not generate the permitted maximum combined pressure P of plastic deformationfamax
Pfamax=a σa
In formula, σa- external member yield strength,
Pfamax=a σa=283.36
3.2, internal member does not generate the permitted maximum combined pressure P of plastic deformationfimax
Pfimax=c σi
In formula, σi- internal member yield strength, σi=785；
Pfimax=c σi=392.50
3.3, the permitted maximum combined pressure P of load is transmittedfmaxTake PfamaxAnd PfimaxMiddle smaller value.
Pfmax=Min (Pfamax、Pfimax)=283.36
4, external member, internal member do not generate the allowed maximum gauge variable quantity e of plastic deformationamaxAnd eimax。
Can be obtained by above content: structural member assembly does not generate the permitted maximum effectively magnitude of interference δ of plastic deformationemax
δemax=eamax+eimax=0.2855
5, basic magnitude of interference δ takes under normal circumstances:
When requiring more bonding strength to lay in, basic magnitude of interference δ is taken:
δ < δemax=0.2855
Summary:, can be by adjusting effective length of fit L, cooperation diameter D according to above-mentioned calculation method2, external member diameter D1
Numerical value, obtain different matching allowance δ to meet load torque requirement.
Embodiment 2
It is assembled in terminal pad 3 when by the use temperature differential method of sub-material bar body 2, the specific steps are as follows:
A, utilize " line-frequency induction heater " that terminal pad is heated to 250 DEG C or so；
B, terminal pad is removed using special equipment, be loaded into sub-material bar body.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of sub-material rod structure, including sub-material bar body (2) and terminal pad (3), it is provided on the terminal pad (3) for installing
The unthreaded hole (1) of blade and threaded hole (4) for installing backward vane, which is characterized in that the sub-material bar body (2) and connection
Disk (3) is using interference fit connection.
2. a kind of sub-material rod structure according to claim 1, which is characterized in that be provided with round peace in the terminal pad (3)
Hole is filled, the sub-material bar body (2) is cylindric.
3. a kind of sub-material rod structure according to claim 2, which is characterized in that the diameter of the sub-material bar body (2) is big
In the diameter of terminal pad (3) inner circular mounting hole.
4. a kind of sub-material rod structure according to claim 1, which is characterized in that adopt one end of the sub-material bar body (2)
It is fitted in terminal pad (3) with interference, effective length of fit L, the cooperation diameter D of the installation end2, external member diameter D1With
Matching allowance is calculated according to the requirement of construction load torque.
5. a kind of sub-material rod structure according to claim 1, which is characterized in that the sub-material bar body (2) uses the temperature difference
Method or plunging are assemblied in terminal pad (3).
6. a kind of paver for being equipped with any one of claim 1-5 sub-material rod structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573791.XA CN110258257A (en) | 2019-06-28 | 2019-06-28 | A kind of sub-material rod structure and the paver for installing it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910573791.XA CN110258257A (en) | 2019-06-28 | 2019-06-28 | A kind of sub-material rod structure and the paver for installing it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110258257A true CN110258257A (en) | 2019-09-20 |
Family
ID=67922757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910573791.XA Pending CN110258257A (en) | 2019-06-28 | 2019-06-28 | A kind of sub-material rod structure and the paver for installing it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110258257A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4491421A (en) * | 1983-11-21 | 1985-01-01 | De Dietrich (Usa), Inc. | Impeller assembly and shaft having interference fit |
| CN104963259A (en) * | 2015-05-29 | 2015-10-07 | 徐工集团工程机械股份有限公司道路机械分公司 | Rotating material distribution rod structure of paver |
| CN210481961U (en) * | 2019-06-28 | 2020-05-08 | 徐工集团工程机械股份有限公司道路机械分公司 | Material distributing rod structure and paver provided with same |
-
2019
- 2019-06-28 CN CN201910573791.XA patent/CN110258257A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4491421A (en) * | 1983-11-21 | 1985-01-01 | De Dietrich (Usa), Inc. | Impeller assembly and shaft having interference fit |
| CN104963259A (en) * | 2015-05-29 | 2015-10-07 | 徐工集团工程机械股份有限公司道路机械分公司 | Rotating material distribution rod structure of paver |
| CN210481961U (en) * | 2019-06-28 | 2020-05-08 | 徐工集团工程机械股份有限公司道路机械分公司 | Material distributing rod structure and paver provided with same |
Non-Patent Citations (1)
| Title |
|---|
| 闫俊华、赵拼搏、何冬梅: "超宽摊铺机分料杆过盈装配工艺试验研究", 《工程机械与维修》, no. 1, 10 January 2019 (2019-01-10), pages 74 - 75 * |
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