CN108801617A - A kind of load-measuring device for cabin door lock reliability test - Google Patents
A kind of load-measuring device for cabin door lock reliability test Download PDFInfo
- Publication number
- CN108801617A CN108801617A CN201810597185.7A CN201810597185A CN108801617A CN 108801617 A CN108801617 A CN 108801617A CN 201810597185 A CN201810597185 A CN 201810597185A CN 108801617 A CN108801617 A CN 108801617A
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- China
- Prior art keywords
- push
- pull
- leading screw
- cabin door
- pull rod
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a kind of load-measuring devices for cabin door lock reliability test, are made of sliding block, leading screw, pull pressure sensor, push-pull rod, push-and-pull block, lock ring and cabin door lock mounting plate；Two sliding blocks are respectively fixedly connected on cabin door lock mounting plate；Leading screw and push-pull rod are located in two sliding blocks, and leading screw and push-pull rod are co-axially mounted.Pull pressure sensor is located between two sliding blocks, and pull pressure sensor is connect by leading screw bearing with leading screw, and push-pull rod is threadedly coupled with push-and-pull block, and lock ring is mounted in the strip-shaped hole of push-and-pull block；Push-pull rod is connect by revolute pair, spherical pair or universal joint with pull pressure sensor.Make lock ring from lockset position of coupler smooth motion to locked position of coupler by rotational lead screw, using the method monitored in real time, realizes the real-time measurement of trigger force and locking load in motion process.Measuring device can reflect the variation of load in latching process and simulate the relative rotation of lock ring and its axis pin and ensure measurement accuracy.
Description
Technical field
The present invention relates to air equipment reliability test fields, more particularly to one kind for measuring the examination of cabin door lock reliability
The load-measuring device of trigger force and locking load that experiment device provides.
Background technology
Trigger-type active cabin door lock is a kind of important aircraft uplock, and reliability is directly related to the flight peace of aircraft
Entirely, to assess the reliability index of cabin door lock, it is very necessary to carry out ground reliability test to cabin door lock.Trigger-type is actively
The latching process of cabin door lock includes following two stages：(1) it triggers the stage, the lock ring on hatch door hits and latch hook is pushed to transport upwards
It is dynamic, until cabin door lock is triggered；(2) the Active Locking stage, after cabin door lock is triggered, cabin door lock internal power source starts to drive lock
Hook and lock ring move upwards, until latched position.In the triggering stage, latch hook is acted on by the upward trigger force of lock ring；Actively
Latch stage, latch hook are acted on by the downward locking load of lock ring.
The latch actuation power that the trigger force and internal power source that cabin door lock needs can be provided is two weights of cabin door lock
Want functional parameter.Trigger force if necessary is excessive, locking may be caused to fail because lock ring cannot trigger cabin door lock；Cabin door lock
After being triggered, if the latch actuation power of cabin door lock is not enough to overcome locking load, locking can equally be caused to fail.Therefore, cabin
Door lock reliability test can apply accurate trigger force and locking load, be the basic guarantor of reliability test credible result
Card.
" the vertical experiment for undercarriage hatch door uplock reliability test fills Chinese patent 201410215944.0
Set ", the patent of invention 201410215943.6 horizontal test device of undercarriage hatch door uplock reliability test " be used for ",
Patent of invention 201610352630.4 " a kind of improved aircraft landing gear uplock experimental rig ", patent
201710264899.1 " the uplock reliability tests that can realize the adjustment of lock ring lateral position " are directed to trigger-type master respectively
Dynamic cabin door lock proposes reliability test.Above-mentioned experimental rig provides trigger force using hydraulic actuator for lock ring, profit
Locking load is provided with spring.Trigger force and locking load are transmitted to by a set of link mechanism on lock ring.Load transmission process
In, the presence of experimental rig internal motion pair friction coefficient inevitably causes the loss of load.However, friction in pairs
Coefficient is influenced by many factors such as material, manufacturing process, lubricating condition, load, and dispersibility is larger, it is difficult to be obtained accurate
Friction coefficient, it is the practical trigger force and locking load that latch hook provides that also just can not accurately calculate lock ring.Therefore a set of load is needed
Lotus measuring device come to trigger force and locking load measure.
There are larger differences with the coefficient of kinetic friction for confficient of static friction, and it is important that the trigger force in motion process and locking
Load, therefore measuring device should be able to measure trigger force and locking load in real time in lock ring motion process.In the triggering stage, lock ring
By the active force that latch hook is downward；In the Active Locking stage, lock ring is by the upward active force of latch hook.Measuring device should be able to adapt to this two
The variation of loading direction under kind operating mode.In addition, in latching process, lock ring can relatively rotate with pin, and between the two rubs
It wipes coefficient and will also result in load loss, therefore load-measuring device should be able to simulate the rotation of lock ring.
Invention content
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of load for cabin door lock reliability test
Lotus measuring device；The load-measuring device makes lock ring from lockset position of coupler smooth motion to locked position of coupler, utilizes the side monitored in real time
Method realizes the real-time measurement of trigger force and locking load in motion process, can reflect in latching process the variation of load and
The relative rotation of lock ring and its axis pin is simulated, and ensures its measurement accuracy.
The technical solution adopted by the present invention to solve the technical problems is:Including the first sliding block, leading screw, leading screw bearing, drawing
Pressure sensor, push-and-pull knock-off joint, the second sliding block, push-pull rod, push-and-pull block, handle, rocking arm, lock ring and cabin door lock mounting plate, institute
It states the first sliding block and second sliding block is fixed on cabin door lock mounting plate, wherein the second sliding block is located at close to the position of lock ring；
The internal thread to match with leading screw is equipped in first sliding block, leading screw is mounted in the first sliding block, and straight line is fixed in the second sliding block
Bearing, push-pull rod are located in the second sliding block, and leading screw and push-pull rod are co-axially mounted；Pull pressure sensor is located at the first sliding block and second
Between sliding block, pull pressure sensor one end is connect with leading screw by leading screw bearing, and the pull pressure sensor other end is logical with push-pull rod
The connection of push-and-pull knock-off joint is crossed, the other end and the push-and-pull block of push-pull rod are connected；
Angle [alpha] between the leading screw and the axis and the lock ring direction of motion of push-pull rod is 0 °<α<90°；
Strip-shaped hole is equipped in the push-and-pull block, and the diameter of bar shaped hole width and lock ring matches, lock ring is located at strip-shaped hole
Interior, the angle β between the length direction and the lock ring direction of motion of the strip-shaped hole is 0 °<β<90°；
The measurement method of its trigger force and locking load includes the following steps:
(1) pressurized strut on cabin door lock reliability test is latched pressure supply；
(2) smooth rotation leading screw makes lock ring be moved upwards up to trigger position, should in the process read suffered by pull pressure sensor
Pressure FS1, the trigger force F of cabin door lock reliability test offer is provided as the following formula1:
(3) it is rotated further leading screw, lock ring is made to move upward to locked position of coupler, the drawing during being somebody's turn to do suffered by pull pressure sensor
Power FS2, the locking load F of cabin door lock reliability test offer is provided as the following formula2:
The leading screw bearing makes leading screw that can only be rotated relative to leading screw bearing, cannot be slided in the axial direction with respect to leading screw bearing
It is dynamic.
The push-and-pull knock-off joint is connect by revolute pair, spherical pair or universal joint with push-pull rod, and push-pull rod cannot be in axis
Relative to push-pull rod joint sliding on direction.
Advantageous effect
A kind of load-measuring device for cabin door lock reliability test proposed by the present invention, by sliding block, leading screw, drawing
Pressure sensor, push-pull rod, push-and-pull block and lock ring, rocking arm, cabin door lock mounting plate composition；Two sliding blocks are respectively fixedly connected in cabin door lock
On mounting plate；Leading screw and push-pull rod are located in two sliding blocks, and leading screw and push-pull rod are co-axially mounted.Pull pressure sensor position
Between two sliding blocks, pull pressure sensor is connect by leading screw bearing with leading screw, and push-pull rod is connected through a screw thread with push-and-pull block,
Lock ring is mounted in the strip-shaped hole of push-and-pull block；Push-pull rod is connect by revolute pair, spherical pair or universal joint with pull pressure sensor.
Make lock ring from lockset position of coupler smooth motion to locked position of coupler by rotational lead screw, using the method monitored in real time, realization is moved through
The real-time measurement of trigger force and locking load in journey.Measuring device can reflect the variation and simulation of load in latching process
The relative rotation of lock ring and its axis pin simultaneously ensures measurement accuracy.
Description of the drawings
Below in conjunction with the accompanying drawings with embodiment to a kind of load measurement for cabin door lock reliability test of the invention
Device is described in further detail.
Fig. 1 is schematic plan view of the load-measuring device of the present invention in unlocking condition.
Fig. 2 is schematic plan view of the load-measuring device of the present invention in blocking.
Fig. 3 is that load-measuring device of the present invention is located at the installation diagram on cabin door lock mounting plate.
Fig. 4 is load-measuring device structural schematic diagram of the present invention.
Fig. 5 is lock ring and rocking arm installation position schematic diagram.
Fig. 6 is cabin door lock mounting plate stereogram.
Fig. 7 is push-and-pull knock-off joint, bearing block and pull pressure sensor exploded view.
Fig. 8 is the sectional view of leading screw bearing.
Fig. 9 is the sectional view of bearing block.
Figure 10 is the stereogram of leading screw lower end partial structurtes.
Figure 11 is the sectional view of the first sliding block.
Figure 12 is the exploded view of the second sliding block.
Figure 13 is the exploded view of push-pull rod and push-and-pull block.
In figure
1. 4. leading screw bearing of the first sliding block 2. handle, 3. leading screw, 5. pull pressure sensor 6. pushes and pulls 7. second sliding block of knock-off joint
8. push-pull rod 9. pushes and pulls 10. lock ring of block, 11. rocking arm, 12. cabin door lock mounting plate, 13. first sliding block mounting hole, 14. second sliding block installation
31. cylindrical surface of hole, 32. shaft shoulder, 41. bearing (ball) cover, 42. bearing block, 43. taper roll bearing, 71. linear bearing seat, 72. linear bearing
Specific implementation mode
The present embodiment is a kind of load-measuring device for cabin door lock reliability test.
Refering to fig. 1~Figure 13, the present embodiment are used for the load-measuring device of cabin door lock reliability test, are slided by first
Block 1, handle 2, leading screw 3, leading screw bearing 4, pull pressure sensor 5, push-and-pull knock-off joint 6, the second sliding block 7, push-pull rod 8, push-and-pull block
9, handle 2, rocking arm, 11 lock rings 10 and cabin door lock mounting plate 12 form；Wherein, lock ring 10, rocking arm 11 and cabin door lock mounting plate 12
It is the component for belonging to cabin door lock reliability test.Lock ring 10 is mounted on by axis pin on rocking arm 11.Under unlocking condition,
Rectangular coordinate system is established at 10 axle center of lock ring, y-axis is the direction of motion of lock ring 10.
The first sliding block mounting hole 13 and the second sliding block mounting hole 14, the first sliding block are respectively arranged on cabin door lock mounting plate 12
1 and second sliding block 7 be bolted on respectively on cabin door lock mounting plate 12, wherein the second sliding block 7 is located at close to lock ring 10
Position.The internal thread to match with leading screw 3 is equipped in first sliding block 1, leading screw 3 is mounted in the first sliding block 1, in the second sliding block 7
It is fixed with linear bearing 72, push-pull rod 8 is located in the second sliding block 7, and leading screw 3 and push-pull rod 8 are coaxial, axis and 10 side of moving of lock ring
Ranging from 0 ° of angle [alpha] between<α<90°.Pull pressure sensor 5 is between the first sliding block 1 and the second sliding block 7, pressure
5 one end of sensor is connect with leading screw 3 by leading screw bearing 4, and 5 other end of pull pressure sensor is connect with push-pull rod 8 by push-pull rod
First 6 connection, the other end and the push-and-pull block 9 of push-pull rod 8 are connected.
3 upper end of leading screw is fixed with handle 2, is used for rotational lead screw 3.Leading screw 3 also can be used other manner and be driven, or
Motor, as long as making 3 smooth rotation of leading screw.3 lower end of leading screw is equipped with leading screw bearing 4, and 4 lower end of leading screw bearing is solid by screw thread
Pull pressure sensor 5 is had, 5 lower end of pull pressure sensor is consolidated with push-and-pull knock-off joint 6,6 lower end of push-and-pull knock-off joint by screw thread
There are two auricles for setting, are linked together by pin and the auricle of 8 upper end of push-pull rod, form a revolute pair.Push-pull rod connects
First 6 can also be connect by spherical pair or universal joint with push-pull rod 8, but push-pull rod 8 cannot connect in the axial direction with respect to push-pull rod
First 6 sliding.8 lower end of push-pull rod is connected with push-and-pull block 9 by screw thread.Pushing and pulling processing in block 9, there are one width and 10 diameter of lock ring
The strip-shaped hole to match, lock ring 10 is mounted in strip-shaped hole, between 10 direction of motion of length direction and lock ring of the strip-shaped hole
Angle β is 0 °<β<90°.
In the present embodiment, the bearing block 42 of leading screw bearing 4 is the columnar structured of one end open, and open end is circumferentially evenly equipped with
Multiple screw holes, the other end are provided with the nipple to match with pull pressure sensor 5.Bearing (ball) cover 41 is disc-shaped structure,
Intermediate position is useful for the through-hole across leading screw 3, circumferentially there is multiple bolt holes.3 lower end of leading screw is machined with for installing circle
The middle part on the cylindrical surface 31 of taper roller bearing 43, cylindrical surface 31 is provided with the shaft shoulder 32, for limiting taper roll bearing 43
Position.Two taper roll bearings 43 are symmetrically mounted on the cylindrical surface 31 of 32 both sides of the shaft shoulder, and then integral installation is in bearing block 42
Cavity in, bearing (ball) cover 41 is connected in 42 open end of bearing block by bolt, and to 3 axis of taper roll bearing 43 and leading screw
To being limited.Leading screw bearing 4 also can be used other structures form, or undertaken simultaneously using angular contact ball bearing axial load and
Radial load, while there is the bearing of smaller friction coefficient, but to ensure that leading screw 3 can only be rotated relative to leading screw bearing 4, without
It can slide in the axial direction, and there is therebetween smaller friction coefficient.
In the present embodiment, the internal thread to match with leading screw 3 is provided in the first sliding block 1.Second sliding block 7 is by linear bearing
Seat 71 and linear bearing 72 form, and linear bearing 72 is fixed in the through-hole in linear bearing seat 71.Push-pull rod 8 and push-and-pull block 9
It is connected in one by screw thread.
The measurement method of its trigger force and locking load includes the following steps:
(1) pressurized strut on cabin door lock reliability test is latched pressure supply；
(2) 2 smooth rotation leading screw 3 of handle is utilized, lock ring 10 is made to be moved upwards up to trigger position, reads draw in this process
Pressure F suffered by pressure sensor 5S1, the trigger force F of cabin door lock reliability test offer is provided as the following formula1:
(3) it is rotated further leading screw 3, lock ring 10 is made to move upward to locked position of coupler, pull pressure sensor 5 should be read in the process
Suffered pulling force FS2, the locking load F of cabin door lock reliability test offer is provided as the following formula2:
In the present embodiment, make lock ring from lockset position of coupler smooth motion to locked position of coupler by rotational lead screw, utilizes real-time prison
The method of survey realizes the real-time measurement of trigger force and locking load in motion process.In fact, trigger force and the locking of cabin door lock
Load is generally up to thousands of oxen, and the weight of motion component is smaller in cabin door lock reliability test, has both made to be moved through
Journey is there are certain acceleration, and the inertia force being induced by it is also much smaller than trigger force and locking load, therefore, as long as making leading screw
Rotation steadily can be obtained higher measurement accuracy substantially.
In latching process, lock ring is rolled along bar shaped internal surface of hole, to relatively rotate with axis pin, therefore measurement result
The influence of friction coefficient between lock ring and axis pin is reflected strictly according to the facts.
Before being triggered, lock ring is contacted with the inside upper surface of strip-shaped hole, and pull pressure sensor is pressurized at this time；Cabin door lock is touched
After hair, lock ring is contacted with the inside bottom surface of strip-shaped hole, at this time pull pressure sensor tension.Therefore load-measuring device can reflect
The variation of loading direction under two kinds of operating modes.
Push-pull rod is connect by revolute pair, spherical pair or universal joint with pull pressure sensor, both deposits leading screw and push-pull rod
Not coaxial, i.e., caused by the gap between rigging error and push-pull rod and the second sliding block, remain to make pull pressure sensor only by
Axial load ensures its measurement accuracy without being acted on by lateral load and moment of flexure.
In latching process, push-pull rod can be acted on by eccentric moment, be generated between push-pull rod and the second sliding block radial
Contact force.Due to being equipped with linear bearing in the second sliding block, according to《Mechanical design handbook》And engineering experience, linear bearing rub
Wiping coefficient can be down to 0.003, and the power that radially contacts between push-pull rod and the second sliding block is generally less than axial direction suffered by push-pull rod
Power, therefore the frictional force between push-pull rod and No. second sliding block is far smaller than the axial force suffered by push-pull rod, ensures that it measures essence
Degree.
Claims (3)
1. a kind of load-measuring device for cabin door lock reliability test, it is characterised in that:Including the first sliding block, silk
Thick stick, leading screw bearing, pull pressure sensor, push-and-pull knock-off joint, the second sliding block, push-pull rod, push-and-pull block, handle, rocking arm, lock ring and cabin
Door lock mounting plate, first sliding block and second sliding block are fixed on cabin door lock mounting plate, are leaned on wherein the second sliding block is located at
The position of nearly lock ring；The internal thread to match with leading screw is equipped in first sliding block, leading screw is mounted in the first sliding block, the second sliding block
It is inside fixed with linear bearing, push-pull rod is located in the second sliding block, and leading screw and push-pull rod are co-axially mounted；Pull pressure sensor is located at the
Between one sliding block and the second sliding block, pull pressure sensor one end is connect with leading screw by leading screw bearing, and pull pressure sensor is another
End is connect with push-pull rod by pushing and pulling knock-off joint, and the other end and the push-and-pull block of push-pull rod are connected；
Angle [alpha] between the leading screw and the axis and the lock ring direction of motion of push-pull rod is 0 °<α<90°；
Strip-shaped hole is equipped in the push-and-pull block, and the diameter of bar shaped hole width and lock ring matches, lock ring is located in strip-shaped hole, should
Angle β between the length direction and the lock ring direction of motion of strip-shaped hole is 0 °<β<90°；
The measurement method of its trigger force and locking load includes the following steps:
(1) pressurized strut on cabin door lock reliability test is latched pressure supply；
(2) smooth rotation leading screw makes lock ring be moved upwards up to trigger position, should read the pressure suffered by pull pressure sensor in the process
Power FS1, the trigger force F of cabin door lock reliability test offer is provided as the following formula1:
(3) it is rotated further leading screw, lock ring is made to move upward to locked position of coupler, the pulling force during being somebody's turn to do suffered by pull pressure sensor
FS2, the locking load F of cabin door lock reliability test offer is provided as the following formula2:
2. the load-measuring device according to claim 1 for cabin door lock reliability test, it is characterised in that:Institute
Stating leading screw bearing makes leading screw that can only be rotated relative to leading screw bearing, cannot be slided in the axial direction with respect to leading screw bearing.
3. the load-measuring device according to claim 1 for cabin door lock reliability test, it is characterised in that:Institute
It states push-and-pull knock-off joint to connect with push-pull rod by revolute pair, spherical pair or universal joint, push-pull rod cannot be opposite in the axial direction
In push-pull rod joint sliding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810597185.7A CN108801617A (en) | 2018-06-12 | 2018-06-12 | A kind of load-measuring device for cabin door lock reliability test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810597185.7A CN108801617A (en) | 2018-06-12 | 2018-06-12 | A kind of load-measuring device for cabin door lock reliability test |
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| CN108801617A true CN108801617A (en) | 2018-11-13 |
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ID=64088398
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| CN201810597185.7A Pending CN108801617A (en) | 2018-06-12 | 2018-06-12 | A kind of load-measuring device for cabin door lock reliability test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110697073A (en) * | 2019-09-29 | 2020-01-17 | 中航通飞研究院有限公司 | Cabin door lock hook type selection test device |
| CN110763451B (en) * | 2019-11-15 | 2021-06-01 | 西北工业大学 | Cabin door lock reliability test device capable of controlling lock hook load and lock ring position |
| CN114383934A (en) * | 2022-01-10 | 2022-04-22 | 中航飞机起落架有限责任公司 | Loading device and method for hook-and-loop lock ring test of landing gear |
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| CN110697073A (en) * | 2019-09-29 | 2020-01-17 | 中航通飞研究院有限公司 | Cabin door lock hook type selection test device |
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| CN110763451B (en) * | 2019-11-15 | 2021-06-01 | 西北工业大学 | Cabin door lock reliability test device capable of controlling lock hook load and lock ring position |
| CN114383934A (en) * | 2022-01-10 | 2022-04-22 | 中航飞机起落架有限责任公司 | Loading device and method for hook-and-loop lock ring test of landing gear |
| CN114383934B (en) * | 2022-01-10 | 2023-11-21 | 中航飞机起落架有限责任公司 | Landing gear hook ring lock ring test loading device and method |
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Application publication date: 20181113 |