CN108680325A - The mechanical vibration exciter of low frequency big load - Google Patents
The mechanical vibration exciter of low frequency big load Download PDFInfo
- Publication number
- CN108680325A CN108680325A CN201810513059.9A CN201810513059A CN108680325A CN 108680325 A CN108680325 A CN 108680325A CN 201810513059 A CN201810513059 A CN 201810513059A CN 108680325 A CN108680325 A CN 108680325A
- Authority
- CN
- China
- Prior art keywords
- roller gear
- speed change
- gear
- gearbox
- low frequency
- 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.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The present invention relates to the mechanical vibration exciters of low frequency big load, including driving motor, gearbox and synchronous gear box, the output end of the driving motor connects transmission input by the second elastic plug tooth-type coupler, and the output end of the gearbox connects the input terminal of synchronous gear box by the first elastic plug tooth-type coupler；It is the configuration of the present invention is simple, easy to use, low frequency big load may be implemented in quantity by increasing sector eccentric block, gearbox uses multiple-speed gearbox, it can convert reduction ratio size, the excitation experiment being suitble under big or side crops industry high frequency operating mode, driving motor is frequency-changing three-phase asynchronous motor, can meet the system operation demand of the range of speeds greatly, under low speed big load operating mode, the method can be widely used in the low frequency dynamic response experiment of the large scale structures such as ship, bridge, basic platform.
Description
Technical field
The present invention relates to the frequency response driving source apparatus fields of large scale structure, the especially mechanical vibration exciter of low frequency big load.
Background technology
Mechanical vibration exciter is a kind of centrifugal rotation mechanism, and two pairs of rotary shafts of setting-up eccentricity wheel are generated by reversely rotating
Vertical or lateral centrifugation resultant force, is acted on by pedestal on tested object, and dynamic response test is carried out to works with this.
In the prior art, the eccentric wheel in vibration exciter rotary shaft is often installed on box house in advance, since cabinet space determines to design
Its eccentricity is unable to get effective increase when eccentric wheel, and can not carry out eccentric wheel according to the rotating speed and exciting force of test requirements document
Corresponding adjustment, therefore, using the vibration exciter of similar structures under low frequency big load excitation test data acquisition will become phase
Work as difficulty.
Invention content
The applicant is directed to above-mentioned existing issue, has carried out Improvement, provides a kind of mechanical exciting of low frequency big load
Machine disclosure satisfy that the experiment demand of large scale structure low frequency big load response.
The technical solution adopted in the present invention is as follows：
The mechanical vibration exciter of low frequency big load, including driving motor, gearbox and synchronous gear box, the driving motor
Output end connects transmission input by the second elastic plug tooth-type coupler, and the output end of the gearbox passes through the first bullet
Property pin gear coupling connection synchronous gear box input terminal；
The concrete structure of the gearbox is as follows：
Include the first gear axis being connect with the second elastic plug tooth-type coupler, the first gear axis and the first speed change
Roller gear engages, and the first speed change roller gear is assemblied in the periphery of jackshaft, in the periphery of the jackshaft, described
The side of first speed change roller gear connects the second speed change roller gear, the second speed change roller gear and third speed change cylinder
Gear engages, and the third speed change roller gear is assemblied in the periphery of output shaft, the 4th speed change is also assembled on the output shaft
Roller gear；
The concrete structure of the synchronous gear box is as follows：
Including the first babinet and the first case lid, the second roller gear, second roller gear is nibbled with the first roller gear
It closes, first roller gear is engaged with third roller gear, and the third roller gear is engaged with the 4th roller gear；Institute
It states the second roller gear axial direction center to be keyed with the first vibrating shaft, be passed with first in the axial centre of first roller gear
Moving axis is keyed, and is keyed in axial centre and the second driving shaft of the third roller gear, in the 4th roller gear
Axial centre and the second vibrating shaft be keyed, the axis that first vibrating shaft and the second vibrating shaft stretch out the first babinet stretches Duan Jun
It is fixed by second sleeve that sector eccentric block, the sector eccentric block and one end of the first vibrating shaft or the second exciting axis connection are installed
Position, the other end of the sector eccentric block are locked by washer and multiple round nuts.
Its further technical solution is：
The driving motor, gearbox and synchronous gear box are fixed in the surface of common base by fastener, in institute
It states on common base, in the also affixed protective cover in the both sides of the synchronous gear box；
The gearbox further includes by first gear axis, collet, jackshaft, the first speed change roller gear, the second speed change circle
The second babinet that stud wheel, output shaft, third speed change roller gear and the 4th speed change roller gear enclose, second babinet with
Second case lid is affixed；
Further include the collet being connect with the first speed change roller gear, one end of the collet and driving lever are affixed；
When the driving lever is allocated to left end, the first speed change roller gear is engaged with the 4th speed change roller gear realizes gearbox
Reduction ratio is minimum, output shaft torque is minimum；When the driving lever is allocated to right end, the second speed change roller gear and third speed change cylinder
Gear engagement realizes that gearbox reduction ratio is maximum, output shaft torque is maximum.；
Axial one end of second roller gear is at the shaft shoulder of the first vibrating shaft, the axial direction of second roller gear
The other end is positioned by the first sleeve；
Circular cone of the both ends of first vibrating shaft and the second vibrating shaft by being installed in 1 bearing hole of synchronous gear box
One end of roller bearing supports, end cover is stretched into the bearing hole and is abutted with taper roll bearing, in the end cover
The side abutted with bearing hole inner wall is equipped with O-ring, is contacted with the first vibrating shaft or the second vibrating shaft in the end cover
Side also sets up oil sealing.
Beneficial effects of the present invention are as follows：
The configuration of the present invention is simple, easy to use, low frequency big load may be implemented in the quantity by increasing sector eccentric block, becomes
Fast case uses multiple-speed gearbox, can convert reduction ratio size, the excitation experiment being suitble under big or side crops industry high frequency operating mode, driving
Motor is frequency-changing three-phase asynchronous motor, can meet the system operation demand of the range of speeds greatly, under low speed big load operating mode,
It the method can be widely used in the low frequency dynamic response experiment of the large scale structures such as ship, bridge, basic platform.
Description of the drawings
Fig. 1 is the three dimensional structure diagram of the present invention.
Fig. 2 is the front view (removal protective cover 7) that the present invention is gone.
Fig. 3 is the left view of Fig. 2.
The vertical view (removal synchromesh gear case lid 101 and gear shift cover 201) that Fig. 4 is Fig. 2.
Fig. 5 is the partial enlarged view of Fig. 4.
Fig. 6 is the internal structure chart I of gearbox in the present invention.
Fig. 7 is the internal structure chart II of gearbox in the present invention.
Fig. 8 is the sector eccentric block installation diagram under horizontal drive operating mode.
Wherein：1, synchronous gear box；101, the first case lid；102, the first babinet；103, the first transmission shaft；104, the first circle
Stud wheel；105, the first vibrating shaft；106, the second roller gear；107, second driving shaft；108, third roller gear；109,
Two vibrating shafts；110, the 4th roller gear；111, the first sleeve；112, taper roll bearing；113, end cover；114, second
Sleeve；115, O-ring；116, oil sealing；117, sector eccentric block；118, washer；119, round nut.2, gearbox；201, second
Case lid；202, the second babinet；203, first gear axis；204, driving lever；205, collet；206, jackshaft；207, the first speed change is justified
Stud wheel；208, the second speed change roller gear；209, output shaft；210, third speed change roller gear；211, the 4th speed change cylinder
Gear；3, driving motor；4, common base；5, the first elastic plug tooth-type coupler；6, the second elastic plug tooth-type coupler；
7, protective cover.
Specific implementation mode
Illustrate the specific implementation mode of the present invention below.
As shown in Figure 1 and Figure 2, the mechanical vibration exciter of low frequency big load includes driving motor 3, gearbox 2 and synchronous gear box
1, which is frequency converting speed regulating three-phase asynchronous electromotor, has the characteristics that low-speed big, by variable-frequency governor and
The combination of gearbox 2 makes it meet the system operation demand of the range of speeds greatly, under low speed big load operating mode.Driving motor 3 it is defeated
Outlet connects 2 input terminal of gearbox by the second elastic plug tooth-type coupler 6, and the output end of gearbox 2 passes through the first elasticity
Pin gear coupling 5 connects the input terminal of synchronous gear box 1, and above-mentioned gearbox is that two level adjustable speed-changing compares gearbox.
As shown in figs. 4 and 6, the concrete structure of gearbox 2 is as follows：
Include the first gear axis 203 being connect with the second elastic plug tooth-type coupler 6, first gear axis 203 and first
Speed change roller gear 207 engages, and the first speed change roller gear 207 is assemblied in the periphery of jackshaft 206, in the outer of jackshaft 206
Connect the second speed change roller gear 208, the second speed change roller gear 208 and the in the side of the first speed change roller gear 207 in week
Three speed change roller gears 210 engage, and third speed change roller gear 210 is assemblied in the periphery of output shaft 209, on output shaft 209
Also assemble the 4th speed change roller gear 211.
Gearbox 2 further includes by first gear axis 203, collet 205, jackshaft 206, the first speed change roller gear 207,
Two speed change roller gears 208, output shaft 209, third speed change roller gear 210 and the 4th speed change roller gear 211 enclose the
Two babinets 202, the second babinet 202 and the second case lid 201 are affixed.It further include the collet being connect with the first speed change roller gear 207
205, one end of collet 205 and driving lever 204 are affixed.As shown in Figure 6, Figure 7, when driving lever 204 is allocated to left end, the first speed change cylinder
Gear 207 is engaged with the 4th speed change roller gear 211 realizes that gearbox reduction ratio is minimum, 209 torque of output shaft is minimum；Driving lever
204 when being allocated to right end, and the second speed change roller gear 208 is engaged with third speed change roller gear 210 realizes gearbox reduction ratio
Maximum, output shaft 209 torque is maximum.
As shown in Figure 4, Figure 5, the concrete structure of synchronous gear box 1 is as follows：
Including the first babinet 102 and the first case lid 101, the second roller gear 106, the second roller gear 106 and first circle
Stud wheel 104 engages, and the first roller gear 104 is engaged with third roller gear 108, third roller gear 108 and the 4th cylinder
Gear 110 engages；It is keyed in 106 axial centre of the second roller gear and the first vibrating shaft 105, in the first roller gear 104
Axial centre and the first transmission shaft 103 be keyed, in axial centre and 107 key of second driving shaft of third roller gear 108
Connection is keyed, the first vibrating shaft 105 and the second exciting in axial centre and the second vibrating shaft 109 of the 4th roller gear 110
The axis of the first babinet 102 of stretching of axis 109 stretches section and is respectively mounted sector eccentric block 117, sector eccentric block 117 and the first vibrating shaft 105
Or second vibrating shaft 109 connect one end positioned by second sleeve 114, the other end of sector eccentric block 117 passes through washer 118
And multiple round nuts 119 are locked, above-mentioned each roller gear is all made of the mode of flooding system lubrication.
Axial one end of first roller gear 104 is at the shaft shoulder of the first vibrating shaft 105, the axis of the first roller gear 104
It is positioned to the other end by the first sleeve 111.The both ends of first vibrating shaft 105 and the second vibrating shaft 109 are same by being installed on
The taper roll bearing 112 walked in 1 bearing hole of gear-box supports, and one end of end cover 113 is stretched into bearing hole and rolled with circular cone
Sub- bearing 112 abuts, in the side that end cover 113 is abutted with bearing hole inner wall equipped with O-ring 115, in end cover 113 and
The side of first vibrating shaft 105 or the contact of the second vibrating shaft 109 also sets up oil sealing 116.
Above-mentioned driving motor 3, gearbox 2 and synchronous gear box 1 are fixed in the surface of common base 4 by fastener,
On common base 4, in the also affixed protective cover 7 in the both sides of synchronous gear box 1, the faceplate part of protective cover 7 can be dismantled, dismounting
Afterwards operating space is reserved for the installation and removal of sector eccentric block 117.Common base 4 is frame-type strong structure in the present invention
Part ensures the assembly precision between each component as synchronous gear box 1, the mounting platform of gearbox 2 and driving motor 3,
Exciting force when carry system operation is transferred to the middle transition task in tested structure.
Torque safety can be ensured using the first elastic plug tooth-type coupler 5 and the second elastic plug tooth-type coupler 6
Reliable to be transferred to execution unit, torque range is wide, displacement compensation amount is big, simple in structure, maintenance with transmitting for above-mentioned shaft coupling
Convenient, non-lubricating advantage.Sector eccentric block 117 uses fragment assembly type in the present invention, on every sector eccentric block 117
It is provided with splined hole.
The specific work process of the present invention is as follows：
In actual use：It can be divided into two different work sides according to the direction of the excitation load needed for geodesic structure
Formula：
(1) vertical excitation
The present invention is rigidly fixed by common base 4 and tested object, is required to select quantity conjunction according to test object
The sector eccentric block 117 of equal amount is installed on the first vibrating shaft by suitable sector eccentric block 117 by the mounting means of Fig. 3
105, the both ends of the second vibrating shaft 109 select speed change according to operating condition of test (big load low frequency operating mode or side crops industry high frequency operating mode)
The reduction ratio of case 2 after every preparation is ready, starts driving motor 3, by variable-frequency governor control system driving frequency,
When work, the first vibrating shaft 105 and 109 direction of rotation of the second vibrating shaft are on the contrary, horizontal direction that sector eccentric block 117 generates
Centrifugal force is cancelled out each other, and the centrifugal force resultant force of vertical direction is transferred to by common base 4 in measurand, and system is realized with this
Vertical exciting test.
(2) horizontal drive
The present invention is rigidly fixed by common base 4 and tested object, is required to select quantity conjunction according to test object
The sector eccentric block 117 of equal amount is installed on the first vibrating shaft by suitable sector eccentric block 117 according to the mounting means of Fig. 8
105, the both ends of the second vibrating shaft 109 select speed change according to operating condition of test (big load low frequency operating mode or side crops industry high frequency operating mode)
The reduction ratio of case 2 after every preparation is ready, starts driving motor 3, by variable-frequency governor control system driving frequency,
When work, the first vibrating shaft 105 and 109 direction of rotation of the second vibrating shaft are on the contrary, vertical direction that sector eccentric block 117 generates
Centrifugal force is cancelled out each other, and the centrifugal force resultant force of horizontal direction is transferred to by common base 4 in measurand, and system is realized with this
Horizontal drive test.
Above description is explanation of the invention, is not the restriction to invention, limited range of the present invention is referring to right
It is required that without prejudice to the basic structure of the present invention, the present invention can make any type of modification.
Claims (7)
1. the mechanical vibration exciter of low frequency big load, it is characterised in that：Including driving motor (3), gearbox (2) and synchronous gear box
(1), the output end of the driving motor (3) connects gearbox (2) input terminal by the second elastic plug tooth-type coupler (6),
The output end of the gearbox (2) connects the input terminal of synchronous gear box (1) by the first elastic plug tooth-type coupler (5)；
The concrete structure of the gearbox (2) is as follows：
Include the first gear axis (203) being connect with the second elastic plug tooth-type coupler (6), the first gear axis (203)
It is engaged with the first speed change roller gear (207), the first speed change roller gear (207) is assemblied in the periphery of jackshaft (206),
Periphery in the jackshaft (206), the side in the first speed change roller gear (207) connect the second speed change roller gear
(208), the second speed change roller gear (208) is engaged with third speed change roller gear (210), the third speed change Cylinder Gear
Wheel (210) is assemblied in the periphery of output shaft (209), and the 4th speed change roller gear is also assembled on the output shaft (209)
(211)；
The concrete structure of the synchronous gear box (1) is as follows：
Including the first babinet (102) and the first case lid (101), the second roller gear (106), second roller gear (106)
It is engaged with the first roller gear (104), first roller gear (104) is engaged with third roller gear (108), the third
Roller gear (108) is engaged with the 4th roller gear (110)；Swash in the second roller gear (106) axial centre and first
The axis (105) that shakes is keyed, and is keyed in axial centre and the first transmission shaft (103) of first roller gear (104), in institute
The axial centre and second driving shaft (107) for stating third roller gear (108) are keyed, in the 4th roller gear (110)
Axial centre and the second vibrating shaft (109) be keyed, first vibrating shaft (105) and the second vibrating shaft (109) stretch out the
The axis of one babinet (102) stretches section and is respectively mounted sector eccentric block (117), the sector eccentric block (117) and the first vibrating shaft (105)
Or second vibrating shaft (109) connection one end pass through second sleeve (114) positioning, the other end of the sector eccentric block (117)
It is locked by washer (118) and multiple round nuts (119).
2. the mechanical vibration exciter of low frequency big load as described in claim 1, it is characterised in that：The driving motor (3), speed change
Case (2) and synchronous gear box (1) are fixed in the surface of common base (4) by fastener, on the common base (4),
In the also affixed protective cover (7) in the both sides of the synchronous gear box (1).
3. the mechanical vibration exciter of low frequency big load as described in claim 1, it is characterised in that：The gearbox (2) further includes
By first gear axis (203), collet (205), jackshaft (206), the first speed change roller gear (207), the second speed change Cylinder Gear
Take turns the second case of (208), output shaft (209), third speed change roller gear (210) and the enclosing of the 4th speed change roller gear (211)
Body (202), second babinet (202) and the second case lid (201) are affixed.
4. the mechanical vibration exciter of low frequency big load as described in claim 1, it is characterised in that：Further include and the first speed change cylinder
The collet (205) of gear (207) connection, one end of the collet (205) and driving lever (204) are affixed.
5. the mechanical vibration exciter of low frequency big load as claimed in claim 4, it is characterised in that：The driving lever (204) is allocated to most
When left end, the first speed change roller gear (207) engaged with the 4th speed change roller gear (211) realize gearbox reduction ratio it is minimum,
Output shaft (209) torque is minimum；When the driving lever (204) is allocated to right end, the second speed change roller gear (208) and third speed change
Roller gear (210) engagement realizes that gearbox reduction ratio is maximum, output shaft (209) torque is maximum.
6. the mechanical vibration exciter of low frequency big load as described in claim 1, it is characterised in that：Second roller gear
(106) at the shaft shoulder of the first vibrating shaft (105), the axial other end of second roller gear (106) is logical for axial one end
Cross the first sleeve (111) positioning.
7. the mechanical vibration exciter of low frequency big load as described in claim 1, it is characterised in that：First vibrating shaft (105)
And second the both ends of vibrating shaft (109) propped up by the taper roll bearing (112) that is installed in 1 bearing hole of synchronous gear box
Support, one end of end cover (113) is stretched into the bearing hole and is abutted with taper roll bearing (112), in the end cover
(113) side abutted with bearing hole inner wall is equipped with O-ring (115), in the end cover (113) and the first vibrating shaft
(105) or the side of the second vibrating shaft (109) contact also sets up oil sealing (116).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810513059.9A CN108680325A (en) | 2018-05-25 | 2018-05-25 | The mechanical vibration exciter of low frequency big load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810513059.9A CN108680325A (en) | 2018-05-25 | 2018-05-25 | The mechanical vibration exciter of low frequency big load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108680325A true CN108680325A (en) | 2018-10-19 |
Family
ID=63808152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810513059.9A Withdrawn CN108680325A (en) | 2018-05-25 | 2018-05-25 | The mechanical vibration exciter of low frequency big load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108680325A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736596A (en) * | 2019-10-18 | 2020-01-31 | 浙江大学城市学院 | portable excitation system for simulating rail operation |
| WO2021031223A1 (en) * | 2019-08-21 | 2021-02-25 | 东北大学 | Device for testing operational reliability of composite blade subjected to impact, vibration, and high-temperature excitation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2413805Y (en) * | 1999-12-03 | 2001-01-10 | 西安建筑科技大学 | Reversal vibration exciter |
| KR20030066027A (en) * | 2002-02-04 | 2003-08-09 | 알엠에스테크놀러지(주) | Variable dynamic force control type exciter for dynamic test of large structure |
| CN101510718A (en) * | 2009-04-03 | 2009-08-19 | 钟祥市新宇机电制造有限公司 | Side board type rectilinear vibration three-phase asynchronous vibrating motor |
| CN201358474Y (en) * | 2009-02-05 | 2009-12-09 | 西南交通大学 | High-speed railway dynamic load field simulation test device |
| CN104863114A (en) * | 2015-05-10 | 2015-08-26 | 孙华平 | Hydraulic ramming apparatus |
| CN106246878A (en) * | 2016-09-20 | 2016-12-21 | 江南大学 | A kind of low-and high-frequency vibrator is suitable for gear-box |
-
2018
- 2018-05-25 CN CN201810513059.9A patent/CN108680325A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2413805Y (en) * | 1999-12-03 | 2001-01-10 | 西安建筑科技大学 | Reversal vibration exciter |
| KR20030066027A (en) * | 2002-02-04 | 2003-08-09 | 알엠에스테크놀러지(주) | Variable dynamic force control type exciter for dynamic test of large structure |
| CN201358474Y (en) * | 2009-02-05 | 2009-12-09 | 西南交通大学 | High-speed railway dynamic load field simulation test device |
| CN101510718A (en) * | 2009-04-03 | 2009-08-19 | 钟祥市新宇机电制造有限公司 | Side board type rectilinear vibration three-phase asynchronous vibrating motor |
| CN104863114A (en) * | 2015-05-10 | 2015-08-26 | 孙华平 | Hydraulic ramming apparatus |
| CN106246878A (en) * | 2016-09-20 | 2016-12-21 | 江南大学 | A kind of low-and high-frequency vibrator is suitable for gear-box |
Non-Patent Citations (3)
| Title |
|---|
| 全国二级建造师执业资格考试试题研究小组: "《机电工程管理与实务》", 31 January 2009, 机械工业出版社 * |
| 李华敏: "《齿轮机构设计与应用中》", 30 September 2007, 机械工业出版社 * |
| 河南省教育厅中小学教材教学研究室: "《河南省中学劳动技术课教材 常用机械知识》", 31 May 1983, 河南人民出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021031223A1 (en) * | 2019-08-21 | 2021-02-25 | 东北大学 | Device for testing operational reliability of composite blade subjected to impact, vibration, and high-temperature excitation |
| CN110736596A (en) * | 2019-10-18 | 2020-01-31 | 浙江大学城市学院 | portable excitation system for simulating rail operation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100526669C (en) | Automatic synchronizing clutch and water supply pump steam turbine high speed jigger device with the same | |
| US9989138B2 (en) | Integrated drive generator having a variable input speed and constant output frequency and method of driving | |
| CN106458004B (en) | Bearing arrangement for an intermediate shaft in a separating clutch of a hybrid module, having separate axial and radial bearings | |
| US20200116236A1 (en) | Drive device for a motor vehicle | |
| CA2738493C (en) | Speed changer assembly | |
| US4369668A (en) | Axial thrust compensation system | |
| CN108680325A (en) | The mechanical vibration exciter of low frequency big load | |
| CN204799530U (en) | Double entry eccentric block formula vibration exciter | |
| CA2740965C (en) | Gearbox with load distribution system | |
| EP3284971A1 (en) | Single shaft two-speed drive system | |
| CN112639266B (en) | Device for changing compression ratio, reciprocating piston internal combustion engine and working device | |
| CN107405992B (en) | Power assembly for motor vehicle, especially car | |
| CN1040685C (en) | Countershaft driven auxiliary drive unit | |
| CN208669963U (en) | A kind of planet-gear transmission device and retarder | |
| CN205110065U (en) | Novel mechanical type vibration exciter | |
| CN201656658U (en) | Special flange type vibration motor for oil field | |
| CN110285208A (en) | A kind of reduction gearbox and screw expander | |
| CN101117997A (en) | Internal tricyclic decelerator | |
| RU2348023C1 (en) | Test-stand reduction gear for testing engines | |
| CN105214927B (en) | Mechanical vibrator | |
| CN105508516A (en) | Orthogonal direct-connection reducer | |
| RU2571313C1 (en) | Reduction motor | |
| CN2397310Y (en) | Regular three ring shock absorber | |
| EP1766264A1 (en) | Mechanical stepless speed change gear | |
| GB2544714B (en) | A load distribution device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20181019 |