CN106979837B - A kind of tractor driving wheel torque measuring device and measurement method - Google Patents
A kind of tractor driving wheel torque measuring device and measurement method Download PDFInfo
- Publication number
- CN106979837B CN106979837B CN201710282486.6A CN201710282486A CN106979837B CN 106979837 B CN106979837 B CN 106979837B CN 201710282486 A CN201710282486 A CN 201710282486A CN 106979837 B CN106979837 B CN 106979837B
- Authority
- CN
- China
- Prior art keywords
- pressure sensor
- gear
- gear ring
- driving wheel
- driving
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
Abstract
The invention discloses a kind of tractor driving wheel torque measuring device and measurement methods, the semiaxis of Tractor Driving Axle is coupled with sun gear gear by spline, sun gear gear and the external toothing of planetary gear side, planetary gear is fixed on the planet carrier by pivot pin, planet carrier is coupled by spline with drive shaft, planetary gear can be rotated around pivot pin, the planetary gear other side and gear ring internal messing, gear ring is equipped with flange, the flange is mounted in the groove on Driving axle housing, one pressure sensor is respectively installed between flange two sides and groove surface, for detecting in planetary gear speed reducing mechanism gear ring to the effect force information of driving axle housing；Data acquisition and computing module acquire the signal of pressure sensor, and the torque of drive shaft, i.e. driving wheel torque are calculated according to the parameters of structural dimension of planetary gear speed reducing mechanism and pressure sensor position size.The present invention is small to the structural modification amount of Tractor Driving Axle, easily realizes batch production and industrialization.
Description
Technical field
The present invention relates to a kind of tractor driving kinetic moment measuring device and measurement methods.
Background technique
In the traction power test and farmland operation control of tractor, need to obtain the workload signal of tractor.
Measurement tractor-drawn load there are two ways to often using, a kind of method are drawn by surveying the tractive force mode of tractor
Load, this method can carry out measuring with vehicle operation；Another method measures the driving moment signal of the driving wheel of tractor.
The drive wheel torque of measurement tractor can be carried out by test-bed, by the loading device on test-bed to driving wheel
Load is measured, but this mode cannot carry out in tractor set operation, and the torgue measurement of driving wheel can also be measured directly
The torque of drive wheel semiaxis obtains, such as: Ma Guorui proposition is mounted with measurement jack shaft between drive shaft and wheel
The torque sensor of torque measures driving wheel torque by torque sensor；Torque sensor is connected on drive by the firm proposition of ox
Between dynamic semiaxis and driving wheel, driving moment is directly obtained.Although both above test methods can directly measure driving force
Square, but increase torque sensor component between drive shaft and driving wheel is increased, change the size of drive shaft.Manage virtuous equality
It is proposed pastes foil gauge in the drive shaft of driving wheel, and strain signal processing module and wireless communication module are mounted on drive shaft
On, the strain signal by receiving wireless communication module obtains driving moment, this test method to foil gauge on the driving shaft
It pastes position and quality requirement is very high, be not easy to make technological knowledge popular and industrialization production.
The present invention proposes that a kind of drive wheel torque that is used for directly measures according to the structure of middle horsepower, high-power drive axle
Method, to drive axle change it is smaller, can be used for tractor set with vehicle operation measure.
Summary of the invention
The present invention provides tractor driving wheel driving moment measuring device and measuring method, can be used for tractor driving wheel
The measurement of driving moment obtains drive wheel load when tractor work.Current some middle horsepower, big-powered tractor drive
The final deceleration of dynamic bridge carries out deceleration torque increase using planetary gear speed reducing mechanism mode, and the planet carrier of planetary gear speed reducing mechanism passes through power
The driving wheel of drive shaft driving tractor.Measuring principle of the invention is to measure the reaction of gear ring in tractor planetary gear
Power calculates acquisition drive wheel torque further according to the structural parameters of planetary gear speed reducing mechanism.Traditional tractor planetary reducer
The gear ring of structure is coupled with Driving axle housing by spline fitted, and the rotational freedom of gear ring is limited in planetary gear speed reducing mechanism.This
Gear ring and driving axle housing are not coupled by spline fitted in invention, but pass through the flange and driving axle housing on gear ring outer surface
The groove of inner surface is coupled, and flange is designed on gear ring, designs a groove, gear ring and Driving axle housing in Driving axle housing
When installation, groove mounted in pairing mode on the flange and Driving axle housing on gear ring, in the flange two sides of gear ring and Driving axle housing
A pressure sensor is respectively filled between groove side, in planetary reduction gear work, is examined by the pressure sensor of flange two sides
The active force that gear ring acts on axle housing is measured, planet is then calculated according to force signals and planetary gear construction parameter and is subtracted
The torque of planet carrier in fast mechanism, the i.e. torque of drive shaft, to obtain the driving moment signal of tractor driving wheel.
The present invention is to realize above-mentioned technical purpose by following technological means.
A kind of driving moment measuring device of tractor driving wheel, including half shaft, Driving axle housing, solar wheeling tooth
Wheel, planetary gear, gear ring, pressure sensor, planet carrier, drive shaft, gear ring flange, pivot pin, driving axle housing groove, drive axle
Shell.The semiaxis of Tractor Driving Axle is coupled with sun gear gear by spline, is nibbled outside sun gear gear and planetary gear side
It closes, planetary gear is fixed on the planet carrier by pivot pin, and planet carrier is coupled by spline with drive shaft, and planetary gear can be around pin shaft
It rotates, the planetary gear other side and gear ring internal messing, the flange on gear ring is mounted among the groove on Driving axle housing, convex
One pressure sensor is respectively installed between edge two sides and groove side.Groove on Driving axle housing passes through I He of pressure sensor
The rotational freedom of the restriction gear ring of pressure sensor II；Data acquisition and computing module acquisition pressure sensor I and pressure sensing
The force signal of device II, and drive shaft output driving moment values are obtained by calculation method.Drive shaft and driving wheel rigidity
Connection, therefore, the driving moment of drive shaft is exactly the driving moment of driving wheel.
The benefit of technical solution of the present invention:
1, the measurement that can be used for tractor driving wheel driving moment, Yi Shi small to the structural modification amount of Tractor Driving Axle
Now batch production and industrialization.
2, On-line sampling system when driving wheel torgue measurement principle and method may be implemented Field-working Tractor-implement, to drag
The control of machine drawing operation provides driving wheel load signal.
Detailed description of the invention
Fig. 1 is a kind of tractor driving wheel torque measuring device structure chart.
Fig. 2 is a kind of tractor driving wheel torque measuring device A to structure chart.
Fig. 3 is the force analysis of planetary gear speed reducing mechanism in Fig. 2 measuring device.
Fig. 4 driving wheel rotates schematic diagram counterclockwise.
Fig. 5 is a kind of tractor driving wheel driving moment measurement method schematic illustration.
A kind of tractor driving wheel driving moment measurement method schematic diagram case schematic diagram of Fig. 6.
The reference numerals are as follows:
1- half shaft 2- Driving axle housing 3- sun gear gear 4- planetary gear 5- gear ring 6- pressure sensor
The acquisition of 7- planet carrier 8- drive shaft 9- gear ring flange 10- driving axle housing groove 11- pressure sensor 12- data and meter
Calculate module 13- pivot pin 14- driving wheel 15- differential mechanism 16- small coning gear shaft 17- right driving wheel 18- left driving wheel.
Specific embodiment
Present invention will be further explained with reference to the attached drawings and specific examples, but protection scope of the present invention is simultaneously
It is without being limited thereto.
1) a kind of structure of tractor driving wheel torque measuring device with couple
Fig. 1, Fig. 2 are a kind of tractor driving wheel torque measuring device structure charts, and Fig. 4 is tractor driving wheel torgue measurement
Principle of device schematic diagram.As shown in Figure 1 and Figure 2, the inventive system comprises half shafts 1, Driving axle housing 2, solar wheeling tooth
3, planetary gear 4, gear ring 5, pressure sensor I 6, planet carrier 7, drive shaft 8, gear ring flange 9, driving axle housing groove 10 are taken turns,
Pressure sensor II 11, data acquisition and computing module 12, pivot pin 13.
As shown in Figure 1 and Figure 2, half shaft 1 is coupled with sun gear gear 3 by spline, sun gear for specific connection
3 are coupled by pivot pin 13 with planetary gear 4 with 4 external toothing of planetary gear, planetary gear 4 and 5 internal messing of gear ring, planet carrier 7, row
Star gear 4 can rotate on pin shaft 13, and planet carrier 7 is coupled with drive shaft 8 by spline, in this way, power output shaft 1, too
Positive gear 3, planetary gear 4, gear ring 5, planet carrier 7 and drive shaft 8 form a planetary reducer, and half shaft 1 is
Power intake, drive shaft 8 are power output ends, and gear ring 5 is mounted in Driving axle housing 2, by gear ring flange 9 and are driven
Groove 10 in dynamic axle housing 2 is coupled, and respectively installs pressure sensing between 10 side of 9 two sides of flange and driving axle housing groove
Device I 6 and pressure sensor II 11, the groove 10 on Driving axle housing 2 are limited by pressure sensor I 6 and pressure sensor II 11
The rotational freedom of fixed tooth circle 5；Data acquisition and computing module 12 acquire the power of pressure sensor I 6 and pressure sensor II 11
Signal, and 8 output driving moment values of drive shaft are obtained by calculation method.As shown in figure 3, drive shaft 8 and driving wheel
14 rigid attachments, therefore, the driving moment of drive shaft 8 are exactly the driving moment of driving wheel 14.
2) a kind of tractor driving wheel torque measuring device working principle and measurement method
As shown in Figure 1 and Figure 2, due to the pressure sensor I 6 and pressure sensor II in the groove 10 on Driving axle housing 2
11 limit the displacement of the flange 9 on gear ring 5, therefore the rotational freedom of gear ring 5 is installed in 2 groove internal pressure of Driving axle housing
The limitation of force snesor I 6 and pressure sensor II 11 finds out according to the motion principle of planetary gear speed reducing mechanism, the rotation of planet carrier 7
Direction is identical as the rotation direction of half shaft 1.Fig. 3 be sun gear gear 3, planetary gear 4, gear ring 5 and planet carrier 7 by
Power analysis chart, if the input torque of half shaft 1 is T1, the output torque of planet carrier 7 is T2, the torque of gear ring is T3, the sun
Gear teeth tooth number is z1, the planetary gear number of teeth is z2, the gear ring number of teeth is z3, each module is all m, as shown in figure 3, sun gear
Gear 3 and planetary gear 4 are F in the tangential forces of meshing point；According to force balance principle, planetary gear 4 and gear ring 5 are being engaged
The tangential forces of point are F；According to the shifting theorem of power, the hinge joint at planet carrier 7 and 4 center of planetary gear is 2F by power,
Couple is 0, therefore, T1, T2,T3It is writeable are as follows:
T1=Fmz1/2；(1)
T2=Fm (z1+z2)；(2)
T3=Fmz3/2·；(3)
It is obtained by formula (2) and formula (3):
By formula (4) it is found that if it is known that the torque T that gear ring 5 is born3, the torque T of planet carrier 7 can be calculated2, that is, drive
The output torque of wheel shaft 8.5 torque T of gear ring3The visible Fig. 2 of measurement scheme, as shown in Fig. 2, the rotational freedom of gear ring 5 is pacified
Pressure sensor I 6 and pressure sensor II 11 inside 2 groove of Driving axle housing limit, and pressure sensor I and pressure pass
Center of the installation site of sensor II apart from sun gear gear is l, and the force signal of pressure sensor I 6 is F1, pressure sensor II
11 force signals are F2；
When driving wheel 14 is to rotate clockwise, as shown in Fig. 2, gear ring bears torque T counterclockwise at this time3, pressure sensing
I 6 stress of device, pressure sensor II 11 do not stress, it may be assumed that the force signal of pressure sensor II 11 is F2=0；It is available:
T3=F1L=(F1+F2)·l；(5)
When driving wheel 14 is rotation counterclockwise, as shown in figure 4, gear ring 5 bears clockwise torque T at this time3, pressure sensing
Device I does not stress, II stress of pressure sensor, it may be assumed that I force signal of pressure sensor is F1=0；It is available:
T3=F2L=(F1+F2)·l；(6)
It is obtained according to formula (5) and formula (6), when driving wheel is rotated clockwise and is rotated counterclockwise, the born torque T of gear ring 53
Calculating formula it is writeable are as follows:
T3=(F1+F2)·l (7)
By formula (4), (7) arrange and obtain:
In formula (8), F1、F2It is the force signal detection limit of pressure sensor I and pressure sensor II, l, z1, z2, z3It is driving
The structural parameters of torque measuring device calculate driving axle torque value T according to formula (8) as a result,2.Fig. 5 is drive wheel torque
Measuring device schematic illustration, drive shaft is linked together with driving wheel 14 by spline in figure, therefore, T2For the drive of driving wheel
Kinetic moment.Data acquisition and computing module 12 acquire I 6 force signal F of pressure sensor1With the force signal F of pressure sensor II 112,
And the driving moment T of driving wheel is calculated by formula (8)2。
Application case
A kind of tractor driving wheel torque measuring device and measurement method application case of the present invention
Tractor driving wheel torque measuring device and measurement method application
For example, the unilateral driving wheel torque capacity in certain model on the drive axle of horsepower tractor is T2max, to the model
Measuring device and measurement method proposed by the present invention can be used in the measurement of tractor driving wheel driving moment, as shown in fig. 6, in figure
Drive shaft coupled with right driving wheel by spline.Bevel pinion of the power of its drive axle from gearbox and transmission case
Axis, imparts power to the differential mechanism in drive axle by small coning gear shaft, imparts power to left and right drive axle by differential mechanism
Semiaxis 1, power pass to drive shaft 8 by half shaft 1, sun gear 3, planetary gear 4, planet carrier 7, final to transmit
To right driving wheel 17, the torque of drive shaft 8 at this time is the driving moment of right driving wheel 17.If 3 number of teeth of sun gear is z1, row
4 number of teeth of star gear is z2, 5 number of teeth of the gear ring number of teeth is z3, the installation site distance of pressure sensor I 6 and pressure sensor II 11 is too
Positive 3 center of wheel gear is l.According to T2maxII 11 maximum weighted of pressure sensor I 6 and pressure sensor is calculated with formula (8)
Load are as follows:
According to II 11 maximum load of calculated pressure sensor I 6 and pressure sensor, to pressure sensor I 6 in Fig. 5
Selecting micro pressure sensor model with pressure sensor II 11, (range is greater than F1maxAnd F2max).According to selected micro pressure
The outer dimension of sensor, the size of the groove 10 on flange 9 and Driving axle housing 2 in design drawing 1 on gear ring 5, data are adopted
Integrate and computing module 12 can be built by Freescale single-chip microcomputer as core devices, data collecting card and PC machine can also be used
It builds.
When tractor is walked or is fallen back forward, i.e., right driving wheel 17 clockwise or counterclockwise when, pass through
Data acquisition and computing module 12 acquire I 6 force signal F of pressure sensor1With the force signal F of pressure sensor II 112, according to survey
Measure structural parameters l, z of device1, z2, z3The driving moment for obtaining out right driving wheel 16 is calculated by formula (8).
Using same sampling device and principle, the driving moment of left driving wheel 18 can be obtained.
The series of detailed descriptions listed above only for feasible embodiment of the invention specifically
Protection scope bright, that they are not intended to limit the invention, it is all without departing from equivalent implementations made by technical spirit of the present invention
Or change should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of tractor driving wheel torgue measurement method characterized by comprising
Step 1: by half shaft (1), sun gear (3), planetary gear (4), gear ring (5), planet carrier (7) and driving wheel
Axis (8) forms planetary reducer, and half shaft (1) is power intake, and drive shaft (8) is power output end；It will drive
Driving wheel axis (8) is coupled with driving wheel (14) by spline；The flange (9) of gear ring (5) is installed on to the groove of Driving axle housing (2)
(10) in, pressure sensor I (6), pressure sensor II (11) are installed on the flange two sides in the Driving axle housing groove,
For detecting in planetary gear speed reducing mechanism gear ring to the effect force information of driving axle housing；
Step 2: the force signal of data acquisition and computing module acquisition pressure sensor I and pressure sensor II, and pass through meter
Calculation method obtains drive shaft output driving moment values, the i.e. driving moment of driving wheel；Circular includes the following:
If the input torque of half shaft (1) is T1, the output torque of planet carrier (7) is T2, the torque of gear ring is T3, the sun
Number of gear teeth is z1, the planetary gear number of teeth is z2, the gear ring number of teeth is z3, each module is all m, sun gear (3) and planet tooth
It is F that (4), which are taken turns, in the tangential forces of meshing point；According to force balance principle, planetary gear (4) and gear ring (5) cutting in meshing point
It is F to active force；According to the shifting theorem of power, the hinge joint at planet carrier (7) and planetary gear (4) center is 2F, power by power
Even is 0, therefore, T1, T2,T3It is writeable are as follows:
T1=Fmz1/2；
T2=Fm (z1+z2)；
T3=Fmz3/2·；
By formula T2=Fm (z1+z2) and formula T3=Fmz3/ 2 obtain:
By formulaIt can obtain: the torque T born according to known gear ring (5)3, planet carrier (7) can be calculated
Torque T2, i.e. the output torque of driving wheel；
The applicable tractor driving wheel torque measuring device of the method, including pressure-detecting device and data acquisition and calculating
Device；
The pressure-detecting device include: half shaft (1), Driving axle housing (2), sun gear (3), planetary gear (4),
Gear ring (5), pressure sensor I (6), pressure sensor II (11), planet carrier (7), drive shaft (8), gear ring flange (9), axis
It sells (13), driving wheel (14)；The half shaft (1) is coupled with sun gear (3) by spline, the sun gear (3)
With planetary gear (4) external toothing, planetary gear (4) and gear ring (5) internal messing, planet carrier (7) pass through pivot pin (13) and planet tooth
(4) connection is taken turns, planetary gear (4) can rotate on pivot pin (13), and planet carrier (7) is coupled with drive shaft (8) by spline；
Half shaft (1), sun gear (3), planetary gear (4), gear ring (5), planet carrier (7) and drive shaft (8) form planet
Deceleration device, half shaft (1) are power intakes, and drive shaft (8) is power output end；Drive shaft (8) and driving
(14) are taken turns to couple by spline；The gear ring (5) is located in the Driving axle housing (2), the pressure sensor I (6), pressure
Sensor II (11) is located in the driving axle housing body, for detecting in planetary gear speed reducing mechanism gear ring to the active force of driving axle housing
Information；
The force signal of the data acquisition and computing device (12) acquisition pressure sensor I (6) and pressure sensor II (11), and
And according to sun gear (3) number of teeth, planetary gear (4) number of teeth, gear ring (5) number of teeth, pressure sensor I (6) and pressure sensor
The position dimension parameter of II (11) calculates drive shaft (8) output driving moment values, obtains the driving moment of driving wheel (14)；
The Driving axle housing is equipped with groove (10), and the gear ring is coupled by flange (9) with the groove (10)；In
Pressure sensor I (6) and pressure sensor II are respectively installed between flange (9) two sides and driving axle housing groove (10) side
(11), the groove (10) on Driving axle housing (2) limits gear ring (5) by pressure sensor I (6) and pressure sensor II (11)
Rotational freedom；
The data acquisition and computing module use single-chip microcontroller to realize for the signal acquisition process unit of core, or use data
Capture card and PC machine build realization；
Gear ring (5) the torque T3Measurement method it is as follows:
If center of the installation site of pressure sensor I (6) and pressure sensor II (11) apart from sun gear (3) is l, pressure
The force signal of sensor I (6) is F1, pressure sensor II (11) force signal is F2；
When driving wheel is to rotate clockwise, gear ring (5) bears torque T counterclockwise at this time3, pressure sensor I (6) stress, pressure
Sensor II (11) does not stress, i.e., pressure sensor II (11) force signal is F2=0；It is available:
T3=F1L=(F1+F2)·l；
When driving wheel is rotation counterclockwise, gear ring (5) bears clockwise torque T at this time3, pressure sensor I (6) do not stress, and presses
Force snesor II (11) stress, i.e. pressure sensor I (6) force signal are F1=0；It is available:
T3=F2L=(F1+F2)·l；
According to formula T3=F1L=(F1+F2) l and formula T3=F2L=(F1+F2) l obtains, driving wheel rotate clockwise and
Counterclockwise when rotation, the born torque T of gear ring (5)3Calculating formula it is writeable are as follows:
T3=(F1+F2)·l。
2. a kind of tractor driving wheel torgue measurement method according to claim 1, which is characterized in that by formula
T3=(F1+F2) l obtains the driving moment T of driving wheel (14)2Calculation expression are as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710282486.6A CN106979837B (en) | 2017-04-26 | 2017-04-26 | A kind of tractor driving wheel torque measuring device and measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710282486.6A CN106979837B (en) | 2017-04-26 | 2017-04-26 | A kind of tractor driving wheel torque measuring device and measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106979837A CN106979837A (en) | 2017-07-25 |
| CN106979837B true CN106979837B (en) | 2019-12-03 |
Family
ID=59345942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710282486.6A Active CN106979837B (en) | 2017-04-26 | 2017-04-26 | A kind of tractor driving wheel torque measuring device and measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106979837B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108844666B (en) * | 2018-05-14 | 2023-10-24 | 南京农业大学 | Tractor hangs force measurement device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216040A2 (en) * | 1985-09-26 | 1987-04-01 | AlliedSignal Inc. | Torque sensor |
| CN102620875A (en) * | 2012-04-09 | 2012-08-01 | 潍柴动力股份有限公司 | Torque measurer |
| CN103196603A (en) * | 2013-03-13 | 2013-07-10 | 宁波能威电机科技有限公司 | Improved planetary torque transducer |
| CN103939591A (en) * | 2014-04-29 | 2014-07-23 | 安徽理工大学 | Planetary gear speed reducer capable of carrying out torque detection simultaneously |
| CN204572931U (en) * | 2015-03-20 | 2015-08-19 | 同济大学 | A kind of wheel reductor structure with torque real-time detection function |
-
2017
- 2017-04-26 CN CN201710282486.6A patent/CN106979837B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0216040A2 (en) * | 1985-09-26 | 1987-04-01 | AlliedSignal Inc. | Torque sensor |
| CN102620875A (en) * | 2012-04-09 | 2012-08-01 | 潍柴动力股份有限公司 | Torque measurer |
| CN103196603A (en) * | 2013-03-13 | 2013-07-10 | 宁波能威电机科技有限公司 | Improved planetary torque transducer |
| CN103939591A (en) * | 2014-04-29 | 2014-07-23 | 安徽理工大学 | Planetary gear speed reducer capable of carrying out torque detection simultaneously |
| CN204572931U (en) * | 2015-03-20 | 2015-08-19 | 同济大学 | A kind of wheel reductor structure with torque real-time detection function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106979837A (en) | 2017-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105806628B (en) | The more property test platforms of electric tractor and the method for testing using the testing stand | |
| CN201201674Y (en) | Torque force detector of electric bicycle | |
| CN107238453A (en) | A kind of device for pressure measurement | |
| CN106979837B (en) | A kind of tractor driving wheel torque measuring device and measurement method | |
| CN103196603B (en) | A kind of planet torque transducer of improvement | |
| CN102490061B (en) | Planetary speed changing device for machine tool spindle | |
| CN102818693A (en) | Half-module pivoted window mechanism applied to sub transonic speed wind tunnel | |
| CN201269882Y (en) | Speed measurement device for model vehicle | |
| CN203869794U (en) | Wheel motion state vector acquisition apparatus | |
| CN107782568A (en) | A kind of method of testing of crawler travel device power attenuation | |
| CN102803913B (en) | Torque sensor | |
| CN103196602B (en) | A kind of novel planet torque transducer | |
| CN201159690Y (en) | Drive-by-wire steering system experimental device | |
| CN205652209U (en) | Front wheel position display device of car | |
| US8984935B2 (en) | Test device for measuring loads supported by a tire | |
| CN201149069Y (en) | Planet arrangement mechanism having split type power output | |
| CN202004594U (en) | Gear reduction type electric bicycle motor with built-in torque sensor | |
| CN201749125U (en) | Model car speed measuring device | |
| CN103162885B (en) | A kind of planet torque transducer | |
| CN202071873U (en) | Direction locating and guiding device | |
| CN207163609U (en) | A kind of device for pressure measurement | |
| CN208364771U (en) | A kind of retarder and Direct wheel drives mechanism and electric vehicle using the retarder | |
| CN112595443A (en) | Gear ring load distribution detection system and method | |
| CN201661671U (en) | Equidirectional torque and speed shunt output mechanism | |
| CN218094112U (en) | Special gear set for high-speed stay cord displacement sensor |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |