CN208845647U - A kind of planetary structure for wheel spin-up transducer - Google Patents
A kind of planetary structure for wheel spin-up transducer Download PDFInfo
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- CN208845647U CN208845647U CN201820672325.8U CN201820672325U CN208845647U CN 208845647 U CN208845647 U CN 208845647U CN 201820672325 U CN201820672325 U CN 201820672325U CN 208845647 U CN208845647 U CN 208845647U
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Abstract
The utility model belongs to aircraft mechanical transmissioning technology, is related to a kind of planetary structure for wheel spin-up transducer.The utility model includes fastening screw, shift fork, transmission shaft, shaft block ring, bearing block, bearing, gear ring, shell, end cap, transmission gear and driving gear.The utility model has that high reliablity, structure are simple, installation is simple with replacement operation, and can promote output frequency of the velocity sensor in the slow-speed of revolution well；The utility model reduces the auxiliary products quantity of whole system, improves system-level reliability index.
Description
Technical field
The utility model belongs to aircraft mechanical transmissioning technology, is related to a kind of planetary structure for wheel spin-up transducer.
Background technique
Wheel spin-up transducer is widely used in aviation normal braking system, plays the function of detection aircraft wheel speed,
When normal braking systemic effect, antiskid braking control box passes through the output voltage and frequency for determining wheel spin-up transducer, thus
Skid resistance is provided for aircraft.
Existing wheel spin-up transducer structure generally uses two kinds of kinds of drive on being mounted on airplane wheel.
First is that transmission ratio 1:1, is mounted on undercarriage axle interior for wheel spin-up transducer, by being mounted on machine
Driving device driving on wheel, wheel every revolution, velocity sensor also turns around, and velocity sensor with wheel by linking
Form knows wheel current rotating speed, and wheel spin-up transducer exports the frequency and amplitude signal directly proportional to revolving speed, to reflect
Airplane wheel speed under conditions present.Such kind of drive is relatively simple to velocity sensor design requirement, mounting means without
Particular/special requirement, but since velocity sensor is generator-type working principle, when revolving speed is lower, the output frequency of velocity sensor
Rate is unstable, and output amplitude is lower, influences whether antiskid braking control box acquisition, measurement, will lead to antiskid brake control when serious
Box report event processed, causes outfield failure.
Second is that wheel spin-up transducer, is mounted on the sensor installation branch of airplane wheel interior design by transmission ratio 1:14
Transmission ratio is 1:1 on frame.Mounting frame for sensor is connect by gear-driven form with airplane wheel, transmission ratio 1:14.Fly
Machine wheel every revolution, velocity sensor turn 14 circles, and velocity sensor knows wheel by way of linking with sensor stand
Current rotating speed, wheel spin-up transducer exports the frequency and amplitude signal directly proportional to revolving speed, thus under reflecting conditions present
Airplane wheel speed.Such kind of drive is higher to velocity sensor design requirement, and mounting means is generally eccentricity installation, but
Be due to transmission ratio be 1:14, wheel spin-up transducer rotate when speed it is higher, generate vibration and noise it is larger, simultaneously as being
Gear forms installation needs that inner gear structure and velocity sensor mounting bracket are arranged inside wheel at this time, increases wheel
Design difficulty.
Present aircraft requirements wheel spin-up transducer can be truly reflected airplane wheel speed, part host unit as far as possible
Airplane wheel speed signal is introduced flight control system, current aircraft speed signal is determined as reference speed signal.
This requires velocity sensors should be able to really reflect that current wheel speed signal, frequency signal shadow are stablized, and output amplitude should be stablized
It can measure.
Through data-searching, it is widely applied planetary gear in Design of Speed Reducer as driving form, has changed structure and has
The features such as bearing capacity small in size, light-weight, compact-sized is high, movement is steady, shock resistance and vibrational energy are strong.Do not retrieve it
Structure uses the application in airplane wheel brake.
Utility model content
In order to solve the problems, such as that output frequency is unstable under the slow-speed of revolution present in existing wheel spin-up transducer technology, this
Utility model proposes a kind of planetary structure for wheel spin-up transducer.
The technical solution of the utility model is: a kind of planetary structure for wheel spin-up transducer, including fastening screw
1, shift fork 2, transmission shaft 3, shaft block ring 4, bearing block 5, bearing 6, gear ring 7, shell 8, end cap 9, transmission gear 10 and driving tooth
Wheel 11.The bearing block is mounted in shell, the hole bottom end on shell.The identical bearing of two specifications is separately mounted to axis
It holds in the two side holes of seat, and abuts bottom.Transmission shaft is pressed into bearing by way of transition fit, and completely by bearing, and
In the inner ring for abutting against a side bearing.Shaft block ring is used to limit transmission shafts to moving.Shift fork is mounted on transmission shaft end, spiral shell
It follows closely inside the threaded hole being screwed on transmission shaft, the annular convex platform on screw is tightly attached on shift fork end face.Circumferencial direction on transmission shaft
Boss at uniformly distributed 3, is equipped with the identical transmission gear of 3 specifications.Gear ring is tightly attached on an end face of bearing block, is driven with 3
Gear engagement.Driving gear is mounted in the identical transmission gear of 3 specifications, is engaged with transmission gear.End cap is used to limit master
The position of moving gear and transmission gear, prevents in high-speed rotation, driving gear or transmission gear abjection.
The utility model has that high reliablity, structure are simple, installation is simple with replacement operation, and can promote speed well
Output frequency of the sensor in the slow-speed of revolution；The utility model in wheel spin-up transducer interior design planetary gear construction,
The output frequency of wheel spin-up transducer is effectively improved under same rotational speed, while the design for reducing wheel brake is difficult
Degree, reduces the auxiliary products quantity of whole system, improves system-level reliability index.
Detailed description of the invention
Fig. 1 is the planetary structure schematic diagram that utility model is used for wheel spin-up transducer；Wherein Fig. 1 a is its cross-sectional view, figure
1b is its side view；
Fig. 2 is fastening screw structural schematic diagram；
Fig. 3 a is shifting fork structure cut-away view, Fig. 3 b is shifting fork structure left view schematic diagram；
Fig. 4 a is transmission shaft structure right view, Fig. 4 b is transmission shaft structure cross-sectional view schematic diagram；
Fig. 5 a is shaft block ring main view, Fig. 5 b is shaft block ring side view schematic diagram；
Fig. 6 a is bearing block structure cross-sectional view, Fig. 6 b is bearing block structure left view schematic diagram；
Fig. 7 a is gear ring structure cross-sectional view, Fig. 7 b is gear ring structure left view schematic diagram；
Fig. 8 is schematic diagram of housing structure；
Fig. 9 is end cover structure schematic diagram
Figure 10 a is transmission gear structural front view, Figure 11 b is transmission gear structure sectional view schematic diagram；
Figure 11 a is driving gear structure sectional view, Figure 11 b is driving gear structural front view schematic diagram.
In figure: 1. fastening screws；2. shift fork；3. shift fork；4. transmission shaft；5. shaft block ring；6. bearing；7. gear ring；8. shell
Body；9. transmission gear；10. driving gear.
Specific embodiment
Specific embodiments of the utility model will be further explained with reference to the accompanying drawings and embodiments.
A kind of planetary structure for wheel spin-up transducer of the utility model, including fastening screw 1, shift fork 2, transmission shaft
3, shaft block ring 4, bearing block 5, bearing 6, gear ring 7, shell 8, end cap 9, transmission gear 10 and driving gear 11.The bearing block
It is mounted in shell, the hole bottom end on shell.The identical bearing of two specifications is separately mounted in the two side holes of bearing block,
And abut bottom.Transmission shaft is pressed into bearing by way of transition fit, and completely by bearing, and abuts against a side bearing
In inner ring.Shaft block ring is used to limit transmission shafts to moving.Shift fork is mounted on transmission shaft end, and screw is screwed on transmission shaft
Inside threaded hole, the annular convex platform on screw is tightly attached on shift fork end face.Boss, installation at circumferencial direction uniformly distributed 3 on transmission shaft
There is the identical transmission gear of 3 specifications.Gear ring is tightly attached on an end face of bearing block, is engaged with 3 transmission gears.Driving gear
It is mounted in the identical transmission gear of 3 specifications, is engaged with transmission gear.End cap is used to limit driving gear and transmission gear
Position prevents in high-speed rotation, driving gear or transmission gear abjection.
The shell is cylindrical body, and one deep hole of inside setting, the distance of the ground distance shell aperture end face in hole is 5mm,
Guarantee that shell does not damage.
Having 1 aperture on the head of screw is that the aperture of 0.8mm has a boss perpendicular to the axis of screw on screw, thick
Spend 0.8mm.
There are 2 symmetrical U-typed mouths on the shift fork, guarantees that the device on external wheel can be effectively inserted into, it is general wide
Degree tolerance takes H10, the hole that diameter is 7mm is equipped with positioned at shift fork centre bit, for passing through transmission shaft.
The design of small circumference shape has annular groove on the transmission shaft, for installing shaft block ring.On the boss of major part one end, in circle
Uniformly distributed 3 diameters, the identical circumferential boss of height in circumferential direction.
The transmission gear is modulus 0.6, the number of teeth 14, the involute gear that 20 ° of pressure angle, thickness 4mm, in transmission gear
It is the hole of 3mm that, which there is diameter in heart position, and the gap between boss on it and transmission shaft is 0.07mm.
The driving gear is modulus 0.6, the number of teeth 17, the involute gear that 20 ° of pressure angle, thickness 4mm, in transmission gear
It is the hole of 3.5mm that, which there is diameter in heart position, it is used to spare interface.
The gear ring be modulus 0.6, the number of teeth 46, the involute gear that 20 ° of pressure angle, thickness 14mm, gear ring outer surface with
The fit clearance in hole is 0.00~0.07mm on shell.
The end cap is boss structure, and centre bit is equipped with the hole that diameter is 5mm, the fit clearance in hole on outer surface and shell
For 0.00~0.07mm.The small 4mm of gear ratio gear ring center circular diameter at boss.
The present embodiment is a kind of transformation ratio mechanism for wheel spin-up transducer.Referring to Fig. 1 to Figure 11.
A kind of planetary structure for wheel spin-up transducer, including fastening screw 1, shift fork 2, transmission shaft 3, shaft block ring
4, bearing block 5, bearing 6, gear ring 7, shell 8, end cap 9, transmission gear 10 and driving gear 11.As shown in Figure 1, shell 8 is this
The matrix of embodiment, the bearing block 5 are mounted at the inner hole of shell 8, are close to the bottom surface of shell 8.The identical axis of two specifications
It holds in the hole that 6 are mounted on bearing block 5.Transmission shaft 3 is successively pressed into two 6 inner holes of bearing, and by boss on transmission shaft 3 with
The inner ring of bearing is bonded.There is an annular groove on the small axis of transmission shaft 3, for installing shaft block ring 4, shaft block ring 4 prevents transmission shaft
Axial moving during the work time.Shift fork 2 is passed through into transmission shaft 3 by the hole of center, fastening screw 1 screws in design and passing
At internal screw thread on moving axis 3.
The identical transmission gear 10 of 3 specifications is mounted at uniformly distributed 3 on transmission shaft 3 on boss.Gear ring 7 is packed into shell
On 8 inner hole of body, gear ring 7 is close to 5 end face of bearing block.Gear ring 7 and transmission gear 10 are intermeshed at this time.Driving gear 11 is pushed into
In 3 transmission gears 10, driving gear 11 and transmission gear 10 are intermeshed.End cap 9 is packed into shell 8, raised head face is tight
The end face of gear ring 7 is pasted, the relative position of gear ring 7 and bearing block 5 is compressed, while driving gear 11 and transmission gear 10 can be prevented
Moving in rotary course.
The hole of diameter 3.5mm is reserved in 11 center of driving gear, is used to hand over other mechanisms of wheel spin-up transducer
It connects, matching relationship is tight fit.
After being installed, shift fork 2 is rotated with hand, is observed whether steady in 6 rotary course of bearing, it is ensured that bearing rotation spirit
It is living.
The drive connection by planetary gear construction in the utility model can be realized compared under the slow-speed of revolution, export one
Higher revolving speed, transmission formula are shown in formula (1)
In formula:
I is Planetary Gear Transmission ratio；
Z1For the number of teeth of gear ring, in the present embodiment, value 46；
Z2For the number of teeth of driving gear, in the present embodiment, value 17.
Being computed transmission ratio is 1:3.7.When transmission shaft 1 circle of rotation, 3.7 circle of driving gear rotation realizes driving gear
Speedup ability.No-load voltage ratio relationship is shown in formula
In formula:
F is the output frequency of wheel spin-up transducer；
I is Planetary Gear Transmission ratio, is calculated as 1:3.7；
N is the current rotating speed of wheel spin-up transducer external drive wheel；
P is the number of teeth of wheel spin-up transducer.
By formula, it can be concluded that, the output frequency of wheel spin-up transducer is directly proportional to planetary gear transmission ratio.
The present embodiment structure is simple, be able to solve velocity sensor output frequency not quietly problem at the low rotational speed, simultaneously
A higher output frequency can be obtained at the low rotational speed.Gear transmitting is continuous, steady, reliable, easy for assemble or unload.
Claims (9)
1. a kind of planetary structure for wheel spin-up transducer, it is characterized in that: the planetary structure include fastening screw (1),
Shift fork (2), transmission shaft (3), shaft block ring (4), bearing block (5), bearing (6), gear ring (7), shell (8), end cap (9), transmission
Gear (10) and driving gear (11)；The bearing block is mounted in shell, the hole bottom end on shell；Two specifications are identical
Bearing be separately mounted in the two side holes of bearing block, and abut bottom；Transmission shaft is pressed into bearing by way of transition fit,
And completely by bearing, and abut against in the inner ring of a side bearing；Shaft block ring is used to limit transmission shafts to moving；Shift fork peace
Mounted in transmission shaft end, screw is screwed into inside the threaded hole on transmission shaft, and the annular convex platform on screw is tightly attached on shift fork end face；
Boss at circumferencial direction uniformly distributed 3, is equipped with the identical transmission gear of 3 specifications on transmission shaft；Gear ring is tightly attached to the one of bearing block
On end face, engaged with 3 transmission gears；Driving gear is mounted in the identical transmission gear of 3 specifications, is nibbled with transmission gear
It closes；End cap is used to limit the position of driving gear and transmission gear, prevents in high-speed rotation, driving gear or transmission gear
Abjection.
2. planetary structure according to claim 1, it is characterized in that: the shell is cylindrical body, one deep hole of inside setting, hole
Ground distance shell aperture end face distance be 5mm, guarantee shell do not damage.
3. planetary structure according to claim 1, it is characterized in that: having 1 aperture on the head of screw is the hole of 0.8mm,
Perpendicular to the axis of screw, there are a boss, thickness 0.8mm on the screw.
4. planetary structure according to claim 1, it is characterized in that: there are 2 symmetrical U-typed mouths on the shift fork, guarantees
Device insertion on external wheel, width tolerance take H10, are equipped with the hole that diameter is 7mm positioned at shift fork centre bit, pass for passing through
Moving axis.
5. planetary structure according to claim 1, it is characterized in that: the design of small circumference shape has annular groove on the transmission shaft,
For installing shaft block ring；On its major part one end boss, uniformly 3 diameters, the identical circumferential of height are convex in a circumferential direction
Platform.
6. planetary structure according to claim 1, it is characterized in that: the transmission gear is modulus 0.6, the number of teeth 14, pressure
The involute gear that 20 ° of angle, thickness 4mm, transmission gear centre bit are equipped with the hole that diameter is 3mm, the boss on hole and transmission shaft
Between gap be 0.07mm.
7. planetary structure according to claim 1, it is characterized in that: the driving gear is modulus 0.6, the number of teeth 17, pressure
The involute gear that 20 ° of angle, thickness 4mm；Transmission gear centre bit is equipped with the hole that diameter is 3.5mm, is used to spare interface.
8. planetary structure according to claim 1, it is characterized in that: the gear ring is modulus 0.6, the number of teeth 46,20 ° of pressure angle
Involute gear, thickness 14mm, the fit clearance in hole is 0.00~0.07mm on gear ring outer surface and shell.
9. planetary structure according to claim 1, it is characterized in that: the end cap is boss structure, and centre bit is equipped with diameter
For the hole of 5mm, the fit clearance in hole is 0.00~0.07mm on outer surface and shell；Gear ratio gear ring center circle at boss is straight
The small 4mm of diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820672325.8U CN208845647U (en) | 2018-05-07 | 2018-05-07 | A kind of planetary structure for wheel spin-up transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820672325.8U CN208845647U (en) | 2018-05-07 | 2018-05-07 | A kind of planetary structure for wheel spin-up transducer |
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| Publication Number | Publication Date |
|---|---|
| CN208845647U true CN208845647U (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820672325.8U Active CN208845647U (en) | 2018-05-07 | 2018-05-07 | A kind of planetary structure for wheel spin-up transducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730425A (en) * | 2018-05-07 | 2018-11-02 | 西安航空制动科技有限公司 | A kind of planetary structure for wheel spin-up transducer |
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2018
- 2018-05-07 CN CN201820672325.8U patent/CN208845647U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730425A (en) * | 2018-05-07 | 2018-11-02 | 西安航空制动科技有限公司 | A kind of planetary structure for wheel spin-up transducer |
| CN108730425B (en) * | 2018-05-07 | 2021-12-03 | 西安航空制动科技有限公司 | Planetary structure for airplane wheel speed sensor |
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