CN106837981A - A kind of embedded engine body suture bolt arrangement and its assembly technology - Google Patents
A kind of embedded engine body suture bolt arrangement and its assembly technology Download PDFInfo
- Publication number
- CN106837981A CN106837981A CN201710183956.3A CN201710183956A CN106837981A CN 106837981 A CN106837981 A CN 106837981A CN 201710183956 A CN201710183956 A CN 201710183956A CN 106837981 A CN106837981 A CN 106837981A
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- screw rod
- crankcase
- embedded nut
- embedded
- screw thread
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- 238000005516 engineering process Methods 0.000 title claims description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 230000005284 excitation Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 230000000638 stimulation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B27/00—Bolts, screws, or nuts formed in integral series but easily separable, particularly for use in automatic machines
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The present invention relates to a kind of embedded engine body suture bolt arrangement, including embedded nut set, screw rod, upper crankcase and lower crankcase.The embedded nut puts the tapped blind hole that nut, optical axis and threaded screw thread are mutually assembled, there are polished rod, external screw thread, external screw thread and clamping face on the screw rod, there are the optical axis of same embedded nut set and the through hole of screw rod assembling on the upper crankcase, there is the tapped blind hole of threaded external screw thread assembling on the lower crankcase.The screw rod is screwed by screw thread and is assemblied on lower crankcase, the upper crankcase is arranged on lower crankcase and screw rod is placed in the through hole of upper crankcase, and the embedded nut set is assemblied in the through hole of upper crankcase and threaded being screwed by screw thread assembles the suture for realizing upper crankcase and lower crankcase.The invention can significantly improve the reliability of body suture texture.
Description
Technical field
The invention belongs to engine structure design field, and in particular to a kind of embedded engine body suture bolt arrangement
And its assembly technology.
Background technology
Body is the skeleton of Diesel engine, and its major function is the movement parts for supporting engine, and forms water channel with oil
Road, it is ensured that the need for engine cool and lubrication.The main carriers that body or the various annexes of engine are installed, while as hair
The bearing that motivation machine is installed on car body.Diesel engine body it is main by upper crankcase, lower crankcase, body suture bolt,
The parts such as main bearing shell, injection pump drive bush are constituted.
Diesel engine body mainly realizes the connection of upper crankcase and lower crankcase, body suture spiral shell by suturing bolt
Bolt is the key components and parts of engine.The reliability of body suture bolt not only directly affects the reliability of body, but also
Influence whether cooling and the greasy property of diesel engine.Body sutures bolt and is once broken down in use with engine,
The failures such as body and the oil leak of cylinder head driving end faying face, upper lower crankcase faying face oil leak will be caused, can also be triggered when serious
Other bigger failures.
Due to being limited by diesel engine body structure, the body for connecting lower crankcase on engine sutures bolt
It is typically only capable to using elongated high-strength bolt.Although body suture bolt tensile strength is larger, because engine is in work
Oscillating load can be produced during work, when body suture bolt certain single order vibration natural frequency in the mounted state is equal to or connects
During the vibrational excitation frequency of nearly engine body suture site, body suture bolt will produce resonance, and then trigger vibration tired
Labor is broken.
Therefore, for the design feature of diesel engine body, bolt arrangement is sutured by rationally design body, effectively
Avoid body from suturing bolt to occur to be broken by vibrating fatigue caused by resonance in the mounted state, be to improve engine body suture
The key of structural reliability.
The content of the invention
The present invention proposes a kind of embedded engine body suture bolt arrangement, by embedded nut set, screw rod, upper bent axle
Case and lower crankcase are assembled, and are capable of achieving the reliable suture of engine body upper crankcase and lower crankcase.
Technical scheme：
A kind of embedded engine body suture bolt arrangement, including embedded nut set, screw rod, upper crankcase and lower song
Axle box；The nut clamped during for assembly or disassembly arranged at the top of embedded nut set, and nut bottom is ibid bent axle
The optical axis that case is mutually assembled, the other end of the optical axis of the embedded nut set is provided with tapped blind hole, the embedded nut set
Nut is provided with knuckle with the intermediate location of optical axis；
The upper external screw thread that the tapped blind hole that there is same embedded nut set one end of the screw rod is mutually assembled, the screw rod it is another
The lower external screw thread that the screwed hole that there is same lower crankcase one end is mutually assembled, externally threaded side under the polished rod position of the screw rod is close
On have the clamping face used during for assembly or disassembly screw rod；
There is the through hole that the optical axis of same embedded nut set is mutually assembled with screw rod on the upper crankcase, on the lower crankcase
There is the tapped blind hole that threaded lower external screw thread is mutually assembled；The screw rod is screwed by screw thread and is assemblied on lower crankcase, described
Upper crankcase is arranged on lower crankcase and screw rod is placed in the through hole of upper crankcase, and the embedded nut set is assemblied in
In the through hole of upper crankcase and threaded assembling is screwed by screw thread realize the suture of upper crankcase and lower crankcase.
Above-mentioned embedded engine body sutures the assembly technology of bolt arrangement, comprises the following steps：
A, the dimensional parameters for determining embedded nut set and screw rod and upper crankcase and lower crankcase connecting portion：According to
The vibrational excitation frequency at parameters of structural dimension and body suture the bolt position of engine body, first using FEM calculation side
Method determines the vibration natural frequency of body suture bolt arrangement screw rod in the mounted state, and polished rod is covered by optimizing embedded nut
Length and diameter and screw rod length and diameter, it is ensured that screw rod vibration natural frequency in the mounted state is higher than engine
The vibrational excitation upper limiting frequency more than 20% at body suture bolt position, on the basis of herein, determines the spiral shell of embedded nut set
The size of cap, optical axis, tapped blind hole and nut and optical axis knuckle, determines polished rod, external screw thread and the clamping face chi of screw rod
It is very little, determine the size of the through hole that upper crankcase is mutually assembled with embedded nut set optical axis with screw rod, determine that lower crankcase is threaded
The size of tapped blind hole mutually assembled of external screw thread；
The processing of b, embedded nut set and screw rod and upper crankcase and lower crankcase connecting portion：It is true according to step a
Fixed embedded nut set and screw rod and the dimensional parameters of upper crankcase and lower crankcase connecting portion, carry out embedded nut
Set and the processing of screw rod, carry out the processing of upper crankcase and lower crankcase connecting portion；
The assembling of c, screw rod and lower crankcase：Screw rod is screwed into assembling on lower crankcase by screw thread, is used on screw rod
The clamping face used during assembly or disassembly screw rod is near lower crankcase, and screw rod is realized in the clamping face clamped with spanner on screw rod
Assembling is screwed with the screw thread between lower crankcase；
Threaded and lower crankcase the assembling of d, upper crankcase：Upper crankcase is arranged on lower crankcase, it is ensured that will walk
The screw rod being arranged on lower crankcase in rapid c is placed in the through hole of upper crankcase.
E, embedded nut set with upper crankcase and screw rod assembling：Embedded nut set is put into the through hole of upper crankcase
In, the nut that embedded nut covers is clamped with spanner, screw assembling by what embedded nut covered internal thread and external thread of screw
Embedded nut is covered into same upper crankcase, screw rod to be assembled together, the seam of engine body upper crankcase and lower crankcase is realized
Close.
The beneficial effects of the invention are as follows：
The embedded engine body suture bolt arrangement of the present invention, is connected using embedded nut set with the bolt of screw combinations
Binding structure, according to engine block structure dimensional parameters, it is determined that embedded nut set and screw rod and upper crankcase and lower song
On the basis of axle box connecting portion size, covered and screw rod and upper crankcase and lower crankcase connecting portion by embedded nut
Processing and assembling, be capable of achieving the reliable suture of engine body upper crankcase and lower crankcase.Nut sleeve uses embedded junction
Structure can shorten spiro rod length, greatly improve screw rod vibration natural frequency in the mounted state, effectively prevent body from suturing spiral shell
Stud structure occurs, by fatigue fracture phenomenon caused by resonance, significantly improving the reliability of housing construction.What embedded nut put
Screwed hole is blind hole, can effectively improve the intensity of embedded nut set；Nut is arranged at embedded nut set top, is easy to embedded spiral shell
Mother set and body suture the assembly or disassembly of bolt arrangement.There is clamping face at the polished rod position of screw rod, be easy to the assembling of screw rod with
Dismounting.When it is determined that embedded nut covers the dimensional parameters with screw rod and upper crankcase and lower crankcase connecting portion, use
Finite element method covers the length and diameter and the length and diameter of screw rod of polished rod by optimizing embedded nut, and screw rod is existed
Vibrational excitation upper limiting frequency more than 20% of the vibration natural frequency higher than engine body suture bolt position under installment state,
Even if can ensure that screw rod also disclosure satisfy that under actual installation state in processing and assembling process in the presence of certain error
Vibration natural frequency effectively prevents screw rod from occurring altogether higher than the vibrational excitation upper limiting frequency at engine body suture bolt position
Shake, fully ensure that the reliability of body suture texture.
Brief description of the drawings
Fig. 1 is embedded nut nested structure schematic diagram.
Fig. 2 is screw-rod structure schematic diagram.
Fig. 3 is embedded engine body suture bolt arrangement schematic diagram.
The nut of 1 embedded nut set 2 screw rod, 3 upper crankcase, 4 lower crankcase 5
The external screw thread of clamping face 9 times of external screw thread 8 on 6 tapped blind holes 7
Specific embodiment
A kind of embedded engine body suture bolt arrangement, including embedded nut set 1, screw rod 2, the and of upper crankcase 3
Lower crankcase 4.The embedded nut set 1 has the nut 5 clamped during for assembly or disassembly, the embedded nut set 1
On have the optical axis that same upper crankcase 3 mutually assembles, have what threaded 2 screw thread 7 was mutually assembled on the optical axis of the embedded nut set 1
Tapped blind hole 6, the nut 5 of the embedded nut set 1 has knuckle with optical axis intermediate location, as shown in Figure 1；The screw rod
The upper external screw thread 7 that the tapped blind hole 6 that there is same embedded nut set 12 one end is mutually assembled, the other end of the screw rod 2 has under
The lower external screw thread 9 that the screwed hole of crankcase 4 is mutually assembled, the polished rod position of the screw rod 2 is useful on the side of lower external screw thread 9
The clamping face 8 used when assembly or disassembly screw rod 2, as shown in Figure 2；There is same embedded nut set 1 on the upper crankcase 3
The through hole that is mutually assembled with screw rod 2 of optical axis, the screw thread for having threaded 2 lower external screw thread 9 mutually to assemble on the lower crankcase 4 is blind
Hole；The screw rod 2 is screwed by screw thread and is assemblied on lower crankcase 4, and the upper crankcase 3 is arranged on lower crankcase 4 and makes
Screw rod 2 is placed in the through hole of upper crankcase 3, and the embedded nut set 1 is assemblied in the through hole of upper crankcase 3 and threaded
2 screw the suture that upper crankcase 3 and lower crankcase 4 are realized in assembling by screw thread, as shown in Figure 3.
Above-mentioned embedded engine body sutures the assembly technology of bolt arrangement, comprises the following steps：
A, the dimensional parameters for determining embedded nut set 1 and screw rod 2 and upper crankcase 3 and the connecting portion of lower crankcase 4：
The vibrational excitation frequency at parameters of structural dimension and body suture the bolt position according to engine body, uses first
Finite element method determines the vibration natural frequency of body suture bolt arrangement screw rod 2 in the mounted state, embedding by optimizing
Enter the length and diameter and the length and diameter of screw rod of the polished rod of formula nut sleeve 1, it is ensured that the vibration in the mounted state of screw rod 2
Intrinsic frequency sutures the vibrational excitation upper limiting frequency more than 20% at bolt position higher than engine body, on the basis of herein, really
Determine nut 5, optical axis, tapped blind hole 6 and the nut 5 and the size of optical axis knuckle of embedded nut set 1, determine screw rod 2
Polished rod, upper and lower two external screw threads and clamping face 8 size, determine upper crankcase 3 with embedded nut set 1 optical axis and screw rod
The size of 2 through holes for mutually assembling, determines the size of the tapped blind hole that the lower external screw thread 9 of lower crankcase 4 threaded 2 is mutually assembled；
For example, the vibrational excitation frequency range at certain engine body suture bolt position is 0-1250Hz, started according to this
The vibrational excitation frequecy characteristic at physical dimension and body suture the bolt position of machine body, by the light that 1 is covered to embedded nut
The length of bar is optimized with the length and diameter of diameter and screw rod 2, and the vibration natural frequency in the mounted state of screw rod 2 is
1600Hz, meets the vibration natural frequency in the mounted state of screw rod 2 and sutures bolt position vibrational excitation higher than engine body
The requirement of upper limiting frequency more than 20%, on the basis of herein, it is determined that embedded nut set 1 shaft diameter be Ф 24mm, length
It is 50mm to spend, it is determined that embedded nut set tapped blind hole 6 size be M14 × 1, depth be 32mm, it is determined that screw rod 2
The a diameter of Ф 14mm of polished rod, length are 145mm, it is determined that screw rod mutually assemble externally threaded size for M14 with embedded nut set 1
× 1, length be 30mm, it is determined that screw rod 2 with lower crankcase 4 mutually assemble externally threaded size for M14 × 1, length be 28mm, really
Fixed upper crankcase 3 is Ф 24mm with the through-hole diameter that the optical axis of embedded nut set 1 is mutually assembled, length is 52mm, it is determined that
The through-hole diameter that upper crankcase 3 threaded 2 is mutually assembled be Ф 15mm, length be 148mm, it is determined that lower crankcase 4 screw thread it is blind
The size in hole is M14 × 1, depth is 32mm.
The processing of b, embedded nut set 1 and screw rod 2 and upper crankcase 3 and the connecting portion of lower crankcase 4：According to step
The embedded nut set 1 that a determines and screw rod 2 and the dimensional parameters of upper crankcase 3 and the connecting portion of lower crankcase 4, are carried out embedding
Enter the processing of formula nut sleeve 1 and screw rod 2, carry out the processing of upper crankcase 3 and the connecting portion of lower crankcase 4；
The assembling of c, screw rod 2 and lower crankcase 4：Screw rod 2 is screwed by screw thread and is assembled on lower crankcase 4, on screw rod 2
The clamping face 8 on screw rod 2 is clamped with spanner near lower crankcase 4 in the clamping face 8 used during for assembly or disassembly screw rod
Realize that screw rod 2 screws assembling with the screw thread between lower crankcase 4；
The assembling of d, upper crankcase 3 threaded 2 and lower crankcase 4：Upper crankcase 3 is arranged on lower crankcase 4, it is ensured that
The screw rod 2 that will be arranged on lower crankcase 4 in step c is placed in the through hole of upper crankcase 3.
E, embedded nut set 1 with upper crankcase 3 and screw rod 2 assembling：Embedded nut set 1 is put into upper crankcase 3
Through hole in, with spanner clamp embedded nut cover 1 nut 5, by embedded nut cover 1 internal thread and screw rod 2 it is upper
With upper crankcase 3, screw rod 2 be assembled together embedded nut set 1 by the assembling that screws of external screw thread 7, realizes on engine body
The suture of crankcase 3 and lower crankcase 4.
The preferred embodiment of the invention is the foregoing is only, creation is not intended to limit the invention, it is all at this
Within the spirit and principle of innovation and creation, any modification, equivalent substitution and improvements made etc. should be included in the invention
Protection domain within.
Claims (6)
1. a kind of embedded engine body sutures bolt arrangement, it is characterised in that：Including embedded nut set, screw rod, upper song
Axle box and lower crankcase；The nut clamped during for assembly or disassembly, nut bottom are arranged at the top of the embedded nut set
It is optical axis that same upper crankcase is mutually assembled, the other end of the optical axis of the embedded nut set is provided with tapped blind hole, the insertion
The nut of formula nut sleeve is provided with knuckle with the intermediate location of optical axis；
The upper external screw thread that the tapped blind hole that there is same embedded nut set one end of the screw rod is mutually assembled, the other end of the screw rod
The lower external screw thread that the screwed hole for having same lower crankcase is mutually assembled, the polished rod position of the screw rod has under on externally threaded side
The clamping face used during for assembly or disassembly screw rod；
The through hole for having the optical axis of same embedded nut set mutually to be assembled with screw rod on the upper crankcase, there is same on the lower crankcase
The tapped blind hole that the lower external screw thread of screw rod is mutually assembled；The screw rod is screwed by screw thread and is assemblied in when on lower crankcase, it is described on
Crankcase is arranged on lower crankcase and screw rod is placed in the through hole of upper crankcase, and the embedded nut set is assemblied in
In the through hole of crankcase and threaded assembling is screwed by screw thread realize the suture of upper crankcase and lower crankcase.
2. embedded engine body according to claim 1 sutures the assembly technology of bolt arrangement, it is characterised in that bag
Include following steps：
A, the dimensional parameters for determining embedded nut set and screw rod and upper crankcase and lower crankcase connecting portion；
The processing of b, embedded nut set and screw rod and upper crankcase and lower crankcase connecting portion；
The assembling of c, screw rod and lower crankcase；
Threaded and lower crankcase the assembling of d, upper crankcase；
E, embedded nut set with upper crankcase and screw rod assembling.
3. assembly technology according to claim 2, it is characterised in that：In step a, the structure chi according to engine body
Very little parameter and the vibrational excitation frequency at body suture bolt position, determine that body is sutured using finite element stimulation method first
The vibration natural frequency of bolt arrangement screw rod in the mounted state, by optimize embedded nut cover the length of polished rod and diameter with
And the length and diameter of screw rod, it is ensured that screw rod vibration natural frequency in the mounted state is higher than engine body suture bolt portion
The vibrational excitation upper limiting frequency more than 20% of position, on the basis of herein, determines that the nut of embedded nut set, optical axis, screw thread are blind
Hole and nut and the size of optical axis knuckle, determine polished rod, external screw thread and the clamping face size of screw rod, determine upper crankcase
The size of the through hole mutually assembled with screw rod with embedded nut set optical axis, determines what the threaded external screw thread of lower crankcase was mutually assembled
The size of tapped blind hole.
4. assembly technology according to claim 2, it is characterised in that：In step c, screw rod is screwed into assembling by screw thread
On lower crankcase, the clamping face used when being used for assembly or disassembly screw rod on screw rod is pressed from both sides near lower crankcase with spanner
Firmly the clamping face on screw rod realizes that screw rod screws assembling with the screw thread between lower crankcase.
5. assembly technology according to claim 2, it is characterised in that：In step d, upper crankcase is arranged on lower bent axle
On case, it is ensured that the screw rod being arranged on lower crankcase in step c is placed in the through hole of upper crankcase.
6. assembly technology according to claim 2, it is characterised in that：In step e, embedded nut set is put into upper song
In the through hole of axle box, the nut that embedded nut covers is clamped with spanner, internal thread and external thread of screw are covered by embedded nut
The assembling that screws embedded nut covered into same upper crankcase, screw rod be assembled together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710183956.3A CN106837981B (en) | 2017-03-24 | 2017-03-24 | A kind of assembly technology of embedded engine body suture bolt arrangement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710183956.3A CN106837981B (en) | 2017-03-24 | 2017-03-24 | A kind of assembly technology of embedded engine body suture bolt arrangement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106837981A true CN106837981A (en) | 2017-06-13 |
| CN106837981B CN106837981B (en) | 2019-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710183956.3A Active CN106837981B (en) | 2017-03-24 | 2017-03-24 | A kind of assembly technology of embedded engine body suture bolt arrangement |
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| Country | Link |
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| CN (1) | CN106837981B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425506A (en) * | 2020-05-21 | 2020-07-17 | 济南实达紧固件有限公司 | Step flange face bolt |
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|---|---|---|---|---|
| JP2005172197A (en) * | 2003-12-15 | 2005-06-30 | Isuzu Motors Ltd | Vibration restricting fastening structure |
| CN201025144Y (en) * | 2007-03-14 | 2008-02-20 | 中国兵器工业集团第七○研究所 | Diesel body structure |
| US20100143074A1 (en) * | 2008-12-09 | 2010-06-10 | Toyota Boshoku Kabushiki Kaisha | Composite member fixing structure |
| WO2011076959A1 (en) * | 2009-12-23 | 2011-06-30 | Amadeo Marti Carbonell, S.A. | Device for assembling the cylinder head of an engine |
| CN104088880A (en) * | 2014-07-01 | 2014-10-08 | 中国北方发动机研究所(天津) | Flexible bolt connecting structure |
| CN205172748U (en) * | 2015-10-31 | 2016-04-20 | 中国嘉陵工业股份有限公司（集团） | Lubricating oil access structure between cylinder head hood and cylinder head |
| CN205207371U (en) * | 2015-11-24 | 2016-05-04 | 加西贝拉压缩机有限公司 | Fastening structure of bent axle box and screw for compressor |
-
2017
- 2017-03-24 CN CN201710183956.3A patent/CN106837981B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005172197A (en) * | 2003-12-15 | 2005-06-30 | Isuzu Motors Ltd | Vibration restricting fastening structure |
| CN201025144Y (en) * | 2007-03-14 | 2008-02-20 | 中国兵器工业集团第七○研究所 | Diesel body structure |
| US20100143074A1 (en) * | 2008-12-09 | 2010-06-10 | Toyota Boshoku Kabushiki Kaisha | Composite member fixing structure |
| WO2011076959A1 (en) * | 2009-12-23 | 2011-06-30 | Amadeo Marti Carbonell, S.A. | Device for assembling the cylinder head of an engine |
| CN104088880A (en) * | 2014-07-01 | 2014-10-08 | 中国北方发动机研究所(天津) | Flexible bolt connecting structure |
| CN205172748U (en) * | 2015-10-31 | 2016-04-20 | 中国嘉陵工业股份有限公司（集团） | Lubricating oil access structure between cylinder head hood and cylinder head |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111425506A (en) * | 2020-05-21 | 2020-07-17 | 济南实达紧固件有限公司 | Step flange face bolt |
| CN111425506B (en) * | 2020-05-21 | 2024-04-16 | 济南实达紧固件股份有限公司 | Step flange face bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106837981B (en) | 2019-07-05 |
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