CN106768785B - Middle low frequency impact spectrum torsion spring type measurement pendulum - Google Patents
Middle low frequency impact spectrum torsion spring type measurement pendulum Download PDFInfo
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- CN106768785B CN106768785B CN201710070482.1A CN201710070482A CN106768785B CN 106768785 B CN106768785 B CN 106768785B CN 201710070482 A CN201710070482 A CN 201710070482A CN 106768785 B CN106768785 B CN 106768785B
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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Abstract
A kind of middle low frequency impact spectrum torsion spring type measurement pendulum, measurement pendulum includes pedestal, torsional spring sleeve, swing rod, shift fork A, mass block, torsional spring, support rod, shift fork B and sliding pin；There are two sliding pins, respectively sliding pin A and sliding pin B；Structurally, what the measurement of its shock response spectrum torsion spring type of the low-frequency vibrator structure of relatively previous low frequency impact spectrometry was put, which rocks structure, to be convenient for carrying with the quality and volume of alleviator；Opposite reed instrument device, shock measurement pendulum can be to avoid the plastic deformations of swing rod structure, to improve the service life of measuring device in the hinge arrangement of fixing end.Functionally, shock response spectrum torsion spring type measurement pendulum is used directly for low-frequency range impact spectrometry in measurement, replaces the measurement method of low-frequency range shock response spectrum in reed instrument and low-frequency vibrator measurement in a closed series.For from measurement method, rotation measuring is changed into straight-line displacement measurement by the cam structure of shock response spectrum torsion spring type measurement pendulum swing rod, and compact-sized, measurement accuracy is high.
Description
Technical field
The invention belongs to shock measurement technical fields, are related to a kind of shock measurement instrument, in particular to a kind of for measuring
Middle low frequency impact spectrum torsion spring type measurement pendulum.
Background technique
Currently, measurement shock response spectrum main method is the time of measuring curve in the way of accelerometer combination mechanical filter
Shock response spectrum is calculated, but accelerometer can evoke its resonance peak under thump, prevent the charge generated from quick release, thus
Generate drift.Zero drift phenomenon will affect the integrality and accuracy of middle low frequency impact spectrometry, and measured value is differed with actual value
One or two order of magnitude, error is larger, is unfavorable for middle low-frequency range shock resistant technique operation index.Reed instrument and low frequency must be utilized
Two kinds of typical measuring arrangements of oscillator, to the shock response spectrum that accelerometer measures obtain, the shock response spectrum of especially middle low-frequency range is mended
It fills and is mutually authenticated.But reed instrument and low-frequency vibrator all can not independent measurement obtain low frequency impact spectral curve, spring in complete
Piece instrument is when measuring low frequency spectrum, since end mass dynamic respond is bigger, causes reed instrument Root Stress excessive and occurs disconnected
It splits；For spring oscillator when measuring low frequency spectrum since frequency is low, the stretching of spring and decrement cause greatly spring oscillator more heavy.
Summary of the invention
Goal of the invention: it is existing at present the purpose is to solve that the present invention provides a kind of middle low frequency impact spectrum torsion spring type measurement pendulum
The problem of.
Technical solution: the present invention is achieved by the following technical solutions.
A kind of middle low frequency impact spectrum torsion spring type measurement pendulum, it is characterised in that: measurement pendulum includes pedestal, torsional spring sleeve, pendulum
Bar, shift fork A, mass block, torsional spring, support rod, shift fork B and sliding pin；There are two sliding pins, respectively sliding pin A and sliding pin B；
Torsional spring includes: torsional spring arm A and torsional spring arm B；Torsional spring arm A and torsional spring arm B is the opposite U-shaped card of two opening directions
Part, torsional spring arm A and torsional spring arm B are divided into the both ends of torsional spring；
Torsional spring sleeve includes: mounting groove A, sliding slot A, positioning surface A, mounting groove B, sliding slot B and positioning surface B；Mounting groove A and peace
Tankage B extending axially inwardly along torsional spring sleeve from the both ends of torsional spring sleeve；Sliding slot A is connected to mounting groove A and sliding slot A is along torsional spring
The circumferencial direction of sleeve extends, and sliding slot A and mounting groove A form T-shaped or L-shaped structure；Sliding slot B is connected to mounting groove B and sliding slot B
Circumferencial direction along torsional spring sleeve extends, and the extending direction of sliding slot B and the extending direction of sliding slot A are on the contrary, sliding slot B and mounting groove B
Form T-shaped or L-shaped structure；The side wall of mounting groove A corresponding with sliding slot A is positioning surface B, mounting groove B's corresponding with sliding slot B
Side wall is positioning surface A；
Swing rod includes: articulated joint, swing rod contact surface A, hinge hole, swing rod sliding slot A, connecting rod, swing rod contact surface B, swing rod cunning
Slot B, the end swing rod sliding slot A, the end swing rod sliding slot B, cam curved surface and mass block；Swing rod contact surface A and swing rod contact surface B set up separately
In the two sides of articulated joint, swing rod sliding slot A is arranged in swing rod contact surface A, and swing rod contact surface B is arranged in swing rod contact surface B, even
Bar connects articulated joint, and mass block connects connecting rod；
The shift fork A includes: shift fork hole A, yoke bar A and shift fork hole B；Shift fork B include: shift fork hole C, yoke bar B and
Shift fork hole D；
Torsional spring, shift fork A and shift fork B cover on support rod, and support rod is arranged on the base, and torsional spring sleeve covers on torsional spring,
Swing rod is covered on torsional spring sleeve by hinge hole；
The position of the torsional spring arm A of torsional spring is corresponding with sliding slot location A, and the U-shaped opening direction of torsional spring arm A and sliding slot A are opened
Mouth direction is identical；There are distances with torsional spring arm AU shape open bottom on the vertex of sliding slot A；
The position of the torsional spring arm B of torsional spring its torsional spring arm B corresponding with the position of sliding slot B and the U-shaped opening direction of torsional spring arm B with
The opening direction of sliding slot B is identical；There are distances for the vertex of sliding slot B and the U-shaped opening bottom of torsional spring arm B；
The yoke bar A of shift fork A is stuck in torsional spring arm A, and the yoke bar B of shift fork B is stuck in torsional spring arm B, and the B connection of shift fork hole is slided
A is sold, sliding pin A is put in the swing rod sliding slot A of swing rod, and can be moved along swing rod sliding slot A, when not in use, sliding pin A and swing rod sliding slot
The contact of the end A；Swing rod sliding slot A and the swing rod end sliding slot A are that A is extended in the same direction endpoint along the chute；When shift fork A and shift fork B is used
It can be slided respectively along the sliding slot A and sliding slot A of torsional spring sleeve；
The shift fork hole D connection sliding pin B of shift fork B, sliding pin B are put in into the swing rod sliding slot B of swing rod, when not in use, sliding pin B with
The contact of the swing rod end sliding slot B；Using the swing rod end sliding slot B as endpoint, B is extended in the same direction swing rod sliding slot B along the chute.
The articulated joint bottom of swing rod is provided with sensor, and sensor includes sensor sleeve, sensor reset spring and biography
Sensor slide bar；The low side of sensor slide bar puts in sensor sleeve and can move up and down along sensor sleeve inner wall, senses
Sensor reset spring is set between the upper end and sensor sleeve of device slide bar；The sensor slide bar of sensor and the cam of swing rod
Curved surface is in contact.
The shift fork hole C of the torsional spring inner wall of the torsional spring, the shift fork hole A of shift fork A and shift fork B covers the support rod in support rod
On outer wall, revolute pair is formed.
The torsional spring arm A of the torsional spring is mounted on the shift fork contact surface A of shift fork A, and the torsional spring arm B of torsional spring is mounted on shift fork
On the shift fork contact surface C of B.
Shift fork A, shift fork B, torsional spring arm A and torsional spring arm B can circumferentially be slided along the support rod outer wall of support rod；Shift fork A
It pushes the torsional spring arm A of torsional spring to generate rotation by shift fork contact surface A, torsional spring torsional deformation is made to generate certain torque；Shift fork B passes through
Shift fork contact surface C pushes torsional spring arm B to generate rotation, and torsional spring torsional deformation is made to generate certain torque.
It is provided with mounting groove A and mounting groove B on torsional spring sleeve, is to guarantee that shift fork A and shift fork B can facilitate installation to torsion
In the sliding slot A and sliding slot B of spring sleeve.
Support rod includes support rod end surface, support lever attachment hole, support rod outer wall and support rod end surface；Pedestal includes: bottom
Plate, bottom plate connecting hole, floor, connecting plate A, sleeve connection hole, support plate connecting hole and connecting plate B, connecting plate A and connecting plate B
It is arranged on bottom plate, support rod is mounted between connecting plate A and connecting plate B；Floor is two and supports connecting plate A and connection respectively
Plate B；Support rod is mounted in the sleeve lining of torsional spring sleeve, the support lever attachment hole of support rod and the connecting hole peace of torsional spring sleeve
On the support plate connecting hole and sleeve connection hole on pedestal connecting plate B, fixation is bolted.
The shift fork hole D of the shift fork hole B and shift fork B of shift fork A respectively on swing rod swing rod sliding slot A and swing rod sliding slot B contact
Connection forms sliding pair, is realized by sliding pin, the swing rod sliding slot A and swing rod on the specially swing rod contact surface A of sliding pin and swing rod
Swing rod sliding slot B on contact surface B is connected, and can be slided along swing rod sliding slot A and swing rod sliding slot B, and sliding pair is formed；It is sliding
On the shift fork hole D for selling the shift fork hole B and shift fork B that are mounted on shift fork A, it is threadably secured connection.
The mass block is square iron block.
Pedestal is mounted on impact experiment machine by bottom plate connecting hole when use.
Beneficial effects of the present invention:
A kind of novel middle low frequency impact spectrum torsion spring type measurement pendulum is studied, on the basis of reed instrument, allows the fixation of cantilever beam
End is connect by hinge with basis, and such cantilever beam is approximated as a rigid body, and measurement range is not by the limit of fixing end deflection
System.Shock response spectrum torsion spring type measurement pendulum is compared with reed instrument: it is improved largely in measurement range compared with reed instrument, the intrinsic frequency of single order
Rate differs larger with second order intrinsic frequency, convenient for filtering off high-order inherent frequence response, to obtain accurately measurement numerical value；
Compared with spring oscillator: shock response spectrum torsion spring type measurement pendulum is torsional vibration system using torsional spring as elastic element, intrinsic frequency with
Swing rod is related to the rotary inertia of mass block, reduces mass block quality by changing oscillating bar length, so that it is whole to mitigate measuring device
Body weight.So opposite reed instrument and spring oscillator are put in the measurement of shock response spectrum torsion spring type, there are advantages in structure, develop and answer
It is extensive with prospect.
Specific advantage is as follows:
(1) structurally, its shock response spectrum torsion spring type of the low-frequency vibrator structure of relatively previous low frequency impact spectrometry is surveyed
What amount was put, which rocks structure, to be convenient for carrying with the quality and volume of alleviator；Opposite reed instrument device, shock measurement pendulum is solid
The hinge arrangement of fixed end can be to avoid the plastic deformation of swing rod structure, to improve the service life of measuring device.
(2) functionally, shock response spectrum torsion spring type measurement pendulum is used directly for low-frequency range impact spectrometry in measurement,
Replace the measurement method of low-frequency range shock response spectrum in reed instrument and low-frequency vibrator measurement in a closed series.
(3) for from measurement method, rotation measuring is changed by the cam structure of shock response spectrum torsion spring type measurement pendulum swing rod
Straight-line displacement measurement, compact-sized, measurement accuracy is high.
Detailed description of the invention:
Fig. 1 shock response spectrum torsion spring type measurement pendulum schematic diagram
Fig. 2 shock response spectrum torsion spring type measurement pendulum overall schematic
Fig. 3 pedestal overall schematic
Fig. 4 swing rod schematic diagram
Fig. 5 sleeve overall schematic
Fig. 6 support rod schematic diagram
Fig. 7 torsional spring overall schematic
Fig. 8 shift fork A overall schematic
Fig. 9 shift fork B overall schematic
Figure 10 sliding pin schematic diagram
Figure 11 support rod, torsional spring and shift fork assembling schematic diagram
Figure 12 sleeve assembling schematic diagram
Figure 13 sensor overall schematic
Wherein, pedestal (1), torsional spring sleeve (2), swing rod (3), shift fork A(4), mass block (5), torsional spring (6), support rod
(7), shift fork (8), sliding pin (9) and sensor (10).
Specific embodiment: following further describes the present invention with reference to the drawings:
As shown in figs. 2 and 11, a kind of middle low frequency impact spectrum torsion spring type measurement pendulum, measurement pendulum includes pedestal 1, torsion spring set
Cylinder 2, swing rod 3, shift fork A4, mass block 5, torsional spring 6, support rod 7, shift fork B8 and sliding pin 9；There are two sliding pins 9, respectively sliding pin
A9-1 and sliding pin B9-2；As shown in Figure 10, the sliding pin A9-1 includes: sliding pin connection screw thread 9-3 and slide bar 9-4, sliding pin B9-
2 structures are identical as sliding pin A9-1.
As shown in Figure 1, torsional spring (6) rigidityk, 5 mass of mass block ism, swing rod 3 can swing around coercive mechanism 11, pass through
ChangekWithmRatio, thus change shock response spectrum torsion spring type measurement oscillator system intrinsic frequency.
Torsional spring 6 includes: torsional spring arm A6-1, torsional spring outer wall 6-2 and torsional spring arm B6-3, torsional spring inner wall 6-4；Torsional spring arm A6-1 and
Torsional spring arm B6-3 is the opposite U-shaped fastener of two opening directions, and torsional spring arm A6-1 and torsional spring arm B6-3 are divided into the two of torsional spring 6
End；
As shown in figure 5, torsional spring sleeve 2 includes: connecting hole 2-1, sleeve lining 2-2, barrel contacts face A2-3, mounting groove
A2-4, sliding slot A2-5, sleeve outer wall 2-6, positioning surface A2-7, barrel contacts face B2-8, mounting groove B2-9, sliding slot B2-10 and fixed
Plane B2-11；Barrel contacts face B2-8 is identical as barrel contacts face A2-3 structure, and mounting groove A2-4 and mounting groove B2-9 are from torsional spring
The both ends of sleeve 2 are extended axially inwardly along torsional spring sleeve 2；Sliding slot A2-5 is connected to mounting groove A2-4 and sliding slot A2-5 is along torsional spring
The circumferencial direction of sleeve 2 extends, and sliding slot A2-5 and mounting groove A2-4 form T-shaped or L-shaped structure；Sliding slot B2-10 and mounting groove
B2-9 is connected to and sliding slot B2-10 extends along the circumferencial direction of torsional spring sleeve 2, and the extending direction of sliding slot B2-10 is with sliding slot A2-5's
Extending direction is on the contrary, sliding slot B2-10 and mounting groove B2-9 form T-shaped or L-shaped structure；Mounting groove corresponding with sliding slot A2-5
The side wall of A2-4 is positioning surface B2-11, and the side wall of mounting groove B2-9 corresponding with sliding slot B2-10 is positioning surface A2-7；
As shown in figure 4, be the both direction view of swing rod 3, swing rod 3 includes: articulated joint, swing rod contact surface A3-1, hinged
Hole 3-2, swing rod sliding slot A3-3, connecting rod 3-4, swing rod contact surface B3-5, swing rod sliding slot B3-6, swing rod sliding slot A end 3-7, swing rod
Sliding slot B end 3-8, cam curved surface 3-9 and mass block 5；Swing rod contact surface A3-1 and swing rod contact surface B3-5 are divided into articulated joint
Two sides, swing rod sliding slot A3-3 be arranged in swing rod contact surface A3-1, swing rod contact surface B3-5 be arranged in swing rod contact surface B3-5
Interior, connecting rod 3-4 connection articulated joint, mass block 5 connects connecting rod 3-4；
As shown in Figure 8 and Figure 9, the shift fork A4 includes: shift fork hole A4-1, yoke bar A4-6, shift fork end face 4-2, dials
Fork contact surface A4-3 and shift fork hole B4-4, shift fork contact surface B4-5；The shift fork B8 includes: shift fork hole C8-1, yoke bar B8-
6, shift fork end face 8-2, shift fork contact surface C8-3 and shift fork hole D8-4, shift fork contact surface D8-5；
Torsional spring 6, shift fork A4 and shift fork B8 cover on support rod 7, and support rod 7 is arranged on pedestal 1, and 2 sets of torsional spring sleeve exists
On torsional spring 6, swing rod 3 is covered on torsional spring sleeve 2 by hinge hole 3-2；
The position of the torsional spring arm A6-1 of torsional spring 6 is corresponding with the position sliding slot A2-5, and the U-shaped opening direction of torsional spring arm A6-1 with
The opening direction of sliding slot A2-5 is identical；There are distances with torsional spring arm A6-1U shape open bottom by the vertex 2-12 of sliding slot A2-5；This
Distance is to guarantee that yoke bar A4-6 has enough moving distances to reverse torsional spring 6, without because of the torsion completely not yet of torsional spring 6
When just blocked by the vertex 2-12 of sliding slot A2-5.
So-called correspondence is exactly that sliding slot A2-5 and torsional spring arm A6-1 are in using the axis of support rod 7 as on the concentric circles in the center of circle；
The position of the torsional spring arm B6-3 of torsional spring 6 its torsional spring arm B6-3 corresponding with the position of sliding slot B2-10 and torsional spring arm B6-3
U-shaped opening direction it is identical as the opening direction of sliding slot B2-10；The vertex 2-12 of sliding slot B2-10 and the U-shaped of torsional spring arm B6-3 are opened
There are distances for mouth bottom；This distance be in order to guarantee that yoke bar B8-6 has enough moving distances and reverse torsional spring 6, without
Because torsional spring 6 is just blocked by the vertex 2-12 of sliding slot B2-10 when reversing completely not yet.
The yoke bar A4-6 of shift fork A4 is stuck in torsional spring arm A6-1, and the yoke bar B8-6 of shift fork B8 is stuck in torsional spring arm B6-3
Interior, shift fork hole B4-4 connection sliding pin A9-1, sliding pin A9-1 are put in the swing rod sliding slot A3-3 of swing rod 3, and can be along swing rod sliding slot
A3-3 is mobile, and when not in use, sliding pin A9-1 is contacted with swing rod sliding slot A end 3-7；Swing rod sliding slot A3-3 and the end swing rod sliding slot A
3-7 is that A2-5 is extended in the same direction endpoint along the chute；
The shift fork hole D8-4 connection sliding pin B9-2 of shift fork B8, sliding pin B9-2 are put in into the swing rod sliding slot B3-6 of swing rod 3, no
In use, sliding pin B9-2 is contacted with swing rod sliding slot B end 3-8；Swing rod sliding slot B3-6 is using swing rod sliding slot B end 3-8 as endpoint edge
Sliding slot B2-10 is extended in the same direction.
As shown in figure 13, the articulated joint bottom of swing rod 3 is provided with sensor 10, and sensor 10 includes sensor sleeve 10-
1, sensor reset spring 10-2 and sensor slide bar 10-3, sensor sleeve 10-1 are fixed on bottom plate 1-1；Sensor slide bar
The low side of 10-3 puts in sensor sleeve 10-1 and can move up and down along sensor sleeve 10-1 inner wall, sensor slide bar
Sensor reset spring 10-2 is set between the upper end and sensor sleeve 10-1 of 10-3；The sensor slide bar 10-3 of sensor 10
Be in contact with the cam curved surface 3-9 of swing rod 3, sensor reset spring 10-2 guarantee sensor slide bar 10-3 always with cam curved surface
3-9 is in contact condition, the pivot angle variation of moment measuring oscillating bar.
According to the swing angle of swing rod, sensor slide bar 10-3 can follow the track cam curved surface 3-9 to move up and down, thus root
According to slide bar adjustable height measuring oscillating bar swing angle.
The torsional spring inner wall 6-4 of the torsional spring 6, the shift fork hole C8-1 of the shift fork hole A4-1 and shift fork B8 of shift fork A4 are covered and are being propped up
On the support rod outer wall 7-3 of strut 7, revolute pair is formed.
The torsional spring arm A6-1 of the torsional spring 6 is mounted on the shift fork contact surface A4-3 of shift fork A4, the torsional spring arm of torsional spring 6
B6-3 is mounted on the shift fork contact surface C8-3 of shift fork B8.
Shift fork A4, shift fork B8, torsional spring arm A6-1 and torsional spring arm B6-3 can be along support rod outer wall 7-3 weeks of support rod 7
To sliding；Shift fork A4 pushes the torsional spring arm A6-1 of torsional spring 6 to generate rotation by shift fork contact surface A4-3, makes 6 torsional deformation of torsional spring
Generate certain torque；Shift fork B8 pushes torsional spring arm B6-3 to generate rotation by shift fork contact surface C8-3, produces 6 torsional deformation of torsional spring
Raw certain torque.
It is provided with mounting groove A2-4 and mounting groove B2-9 on torsional spring sleeve 2, is to guarantee shift fork A4 and the energy side shift fork B8
Just it installs to the sliding slot A2-5 and sliding slot B2-10 of torsional spring sleeve 2.
As shown in fig. 6, the support rod 7 includes: support rod end surface 7-1, support lever attachment hole 7-2, support rod outer wall
7-3 and support rod end surface 7-4, supports and is provided with support lever attachment hole A7-2 on rod end surface 7-4；As shown in fig. 7, the torsional spring
6 include: torsional spring arm A6-1, torsional spring outer wall 6-2, torsional spring arm B6-3 and torsional spring inner wall 6-4.
As shown in figure 3, pedestal includes: bottom plate 1-1, bottom plate connecting hole 1-2, floor 1-3, connecting plate A1-4, sleeve connection
Hole 1-5, support plate connecting hole 1-6 and connecting plate B1-7, connecting plate B1-7 structure are identical as connecting plate A1-4.Connecting plate A1-4 and
Connecting plate B1-7 is arranged on bottom plate 1-1, and support rod 7 is mounted between connecting plate A1-4 and connecting plate B1-7；Floor 1-3 is two
It is a to support connecting plate A1-4 and connecting plate B1-7 respectively；Support rod 7 is mounted in the sleeve lining 2-2 of torsional spring sleeve 2, support rod
The 7 support lever attachment hole 7-2 and connecting hole 2-1 of torsional spring sleeve 2 is mounted on the support plate connecting hole on 1 connecting plate B1-7 of pedestal
On 1-6 and sleeve connection hole 1-5, fixation is bolted.
The shift fork hole D8-4 of the shift fork hole B4-4 and shift fork B8 of shift fork A4 respectively with the swing rod sliding slot A3-3 and pendulum on swing rod 3
Bar sliding slot B3-6 connects to form sliding pair, is realized by sliding pin 9, specially the swing rod contact surface A3-1 of sliding pin 9 and swing rod 3
On swing rod sliding slot A3-3 and swing rod contact surface B3-5 on swing rod sliding slot B3-6 connect, and can be along swing rod sliding slot
A3-3 and swing rod sliding slot B3-6 sliding, forms sliding pair；Sliding pin 9 is mounted on the shift fork of the shift fork hole B4-4 and shift fork B8 of shift fork A4
On the D8-4 of hole, it is threadably secured connection.
The mass block 5 is square iron block.
Pedestal 1 is mounted on impact experiment machine by bottom plate connecting hole 1-2 when use.
Sliding pin 9 includes: contact bar 9-3 and connecting rod 9-4；Bar 9-3 is contacted to twist and shift fork A4 and shift fork B8 by screw thread fine jade
Connection.Connecting rod 9-4 is put in swing rod sliding slot A3-3 and swing rod sliding slot B3-6.
As shown in figure 11, the assembly relation between support rod 7, shift fork A4, torsional spring 6 and shift fork B8 are as follows: in the torsional spring of torsional spring 6
The shift fork hole C8-1 of wall 6-4, the shift fork hole A4-1 of shift fork A4 and shift fork B8 cover on the support rod outer wall 7-3 of support rod 7；Torsional spring
6 torsional spring arm A6-1 is mounted on the shift fork contact surface A4-3 of shift fork A4, and the torsional spring arm B6-3 of torsional spring 6 is mounted on dialling for shift fork B8
On fork contact surface C8-3；Shift fork A4 and shift fork B8 can circumferentially be slided along the support rod outer wall 7-3 of support rod 7；Torsional spring 6 is
Twisting, shift fork A4 push the torsional spring arm A6-1 of torsional spring 6 to generate rotation, produce 6 torsional deformation of torsional spring by shift fork contact surface A4-3
Raw certain torque；Shift fork B8 pushes torsional spring arm B6-3 to generate rotation by shift fork contact surface C8-3, generates 6 torsional deformation of torsional spring
Certain torque.
As shown in figure 12, in order to guarantee shift fork A4 and shift fork B8 can facilitate installation to torsional spring sleeve 2 sliding slot A2-5 and cunning
In slot B2-10, mounting groove A2-9 is provided on torsional spring sleeve 2；Shift fork A4 is limited by positioning surface A2-7 and positioning surface B2-11
With the movement of shift fork B8；Shift fork A4 and shift fork B8 can be slided along the sliding slot A2-5 and sliding slot A2-10 of torsional spring sleeve 2.
The actual use operation of shock response spectrum torsion spring type measurement pendulum, as shown in Fig. 2, shift fork A4, shift fork B8 and torsional spring 6 are installed
On the support rod outer wall 7-3 of support rod 7, by the sleeve outer wall 2-6 of the hinge hole 3-2 torsional spring sleeve 2 of swing rod 3, then again
Support rod 7 is mounted in the sleeve lining 2-2 of torsional spring sleeve 2, the support lever attachment hole 7-2 and torsional spring sleeve 2 of support rod 7
Connecting hole 2-1 is mounted on the support plate connecting hole 1-6 and sleeve connection hole 1-5 on 1 connecting plate B1-7 of pedestal, is connected by bolt
Connect fixation；The shift fork hole D8-4 of the shift fork hole B4-4 and shift fork B8 of shift fork A4 and the swing rod sliding slot A3-3 on swing rod 3 and swing rod are sliding
Slot B3-6 is connected, and is fixed by sliding pin A9-1；Sliding pin A9-1 and sliding pin B9-2 is separately mounted to the shift fork hole B4- of shift fork A4
On the shift fork hole D8-4 of 4 and shift fork B8, it is threadably secured connection；On the swing rod contact surface A3-1 of sliding pin A9-1 and swing rod 3
Swing rod sliding slot A3-3 connects to form sliding pair, and the swing rod sliding slot B3-6 on sliding pin B9-2 swing rod contact surface B3-5 is connected
Sliding pair is formed, sliding pin can be slided along swing rod sliding slot A3-3 and swing rod sliding slot B3-6；Shock response spectrum torsion spring type measurement pendulum is whole
It is mounted on impact experiment machine by the bottom plate connecting hole 1-2 on pedestal 1.
Shock response spectrum torsion spring type measurement pendulum specific working mode: shock response spectrum torsion spring type measurement pendulum is main under impact loading
For four motion stages: it is secondary that torsional spring once reverses stage, Restoration stage of torsional spring, torsional spring secondary torsion stage and torsional spring
Restoration stage.
First stage, torsional spring once reverse the stage, and for impact loading before pedestal 1, swing rod 3 is in horizontality,
Pedestal 1 is under the effect of forward impact load, and pedestal 1 moves upwards, and due to effect of inertia, swing rod 3 and mass block 5 keep original shape
State, and swing rod 3 is with respect to the downward clockwise oscillation of torsional spring sleeve 2, the end B3-8 of the swing rod sliding slot B3-6 on swing rod 3 is pushed down on
Sliding pin B9-2 and shift fork B8 are rotated clockwise, and shift fork A4 is limited by the positioning surface A2-7 on torsional spring sleeve 2 to be turned clockwise
Dynamic, so the torsional spring arm B6-3 of torsional spring 6 is rotated clockwise under shift fork B8 promotion, torsional spring 6 twists deformation, at this time shift fork A4
On sliding pin A9-1 slided along the swing rod sliding slot A3-3 of swing rod 3, the torsional deflection of torsional spring 6 stops with 3 clockwise oscillation of swing rod
Only terminate.
Second stage, Restoration stage of torsional spring, in the first phase, impact energy is converted into the elastic potential energy of torsional spring 6,
After 3 clockwise oscillation of swing rod stops, since self-recovery power acts on, the torsional spring arm B6-3 on torsional spring 6 starts multiple counterclockwise torsional spring 6
Position rotation, torsional spring arm B6-3 push shift fork B8, sliding pin B9-2 and swing rod 3 and rotate counterclockwise, until torsional spring arm B6-3 moves to original
Beginning position, the reset of torsional spring 6 terminate, and swing rod 3 is in a horizontal position at this time.
Phase III, in the torsional spring secondary torsion stage, in second stage, the elastic potential energy of torsional spring 6 is converted into swing rod 3 and matter
The kinetic energy of gauge block 5, so swing rod 3 and mass block 5 continue to keep counterclockwise due to effect of inertia after torsional spring arm B6-3 reset
The end A3-7 of rotary state, the swing rod sliding slot A3-3 on swing rod 3 pushes sliding pin A9-1 and shift fork A4 to rotate counterclockwise, to dial
The torsional spring arm A6-1 that shift fork contact surface 4-3 on fork A4 pushes torsional spring 6 is rotated counterclockwise, the torsional spring arm B6-3 and shift fork of torsional spring 6
B8 is limited by the positioning surface B2-11 of torsional spring sleeve 2, is unable to counterclockwise movement, so torsional spring 6 generates torsional deflection, until pendulum
The stopping of bar 6 rotates counterclockwise, and torsional spring 6 stops deformation.
Fourth stage, the secondary Restoration stage of torsional spring, for torsional spring 6 since the restoring force of itself acts on, torsional spring arm A6-1 is clockwise
Rotation resets, and torsional spring arm A6-1 pushes shift fork A4 and sliding pin A9-1 is rotated clockwise, and sliding pin A9-1 pushes the swing rod sliding slot of swing rod 3
The end face A3-3, swing rod 3 rotate clockwise, until torsional spring 6 restores deformation, torsional spring arm A6-1 returns to home position, and swing rod 3 is in water
Level state.
After shock response spectrum torsion spring type, which measures pendulum, undergoes this four-stage, at the swing rod 3 and mass block 5 of torsion spring type measurement pendulum
It is constantly converted between continuous swing state, the elastic potential energy and swing rod 3 and the kinetic energy of mass block 5 of torsional spring 6, torsion spring type measurement pendulum
Motion state be constantly in this four-stage, constantly recycle, until shock response spectrum torsion spring type measurement pendulum overall power consumption be zero,
Stop motion.
The measurement method of shock response spectrum torsion spring type measurement pendulum pivot angle, is measured, sensor sleeve 10- using linear displacement transducer
1 is fixed on bottom plate 1-1, and sensor slide bar 10-3 can be slided along sensor sleeve 10-1, sensor reset spring 10-2
Be mounted between sensor sleeve 10-1 and sensor slide bar 10-3, guarantee sensor slide bar 10-3 always with cam curved surface 3-9
Change in contact condition, and by the pivot angle that the straight-line displacement of sensor slide bar 10-3 changes moment measuring oscillating bar.
Claims (10)
1. a kind of middle low frequency impact spectrum torsion spring type measurement pendulum, it is characterised in that: measurement pendulum includes pedestal (1), torsional spring sleeve
(2), swing rod (3), shift fork A(4), mass block (5), torsional spring (6), support rod (7), shift fork B(8) and sliding pin (9)；Sliding pin (9) has
Two, respectively sliding pin A(9-1) and sliding pin B(9-2)；
Torsional spring (6) includes: torsional spring arm A(6-1) and torsional spring arm B(6-3)；Torsional spring arm A(6-1) and torsional spring arm B(6-3) it is two
The opposite U-shaped fastener of opening direction, torsional spring arm A(6-1) and torsional spring arm B(6-3) it is divided into the both ends of torsional spring (6)；
Torsional spring sleeve (2) includes: mounting groove A(2-4), sliding slot A(2-5), positioning surface A(2-7), mounting groove B(2-9), sliding slot B
(2-10) and positioning surface B(2-11)；Mounting groove A(2-4) and mounting groove B(2-9) from the both ends of torsional spring sleeve (2) along torsional spring sleeve
(2) extend axially inwardly；Sliding slot A(2-5) be connected to mounting groove A(2-4) and sliding slot A(2-5) circumference along torsional spring sleeve (2)
Direction extends, sliding slot A(2-5) T-shaped or L-shaped structure is formed with mounting groove A(2-4)；Sliding slot B(2-10) and mounting groove B(2-9)
Connection and sliding slot B(2-10) along torsional spring sleeve (2) circumferencial direction extend, sliding slot B(2-10) extending direction and sliding slot A(2-
5) extending direction is on the contrary, sliding slot B(2-10) T-shaped or L-shaped structure is formed with mounting groove B(2-9)；It is corresponding with sliding slot A(2-5)
Mounting groove A(2-4) side wall be positioning surface B(2-11), mounting groove B(2-9 corresponding with sliding slot B(2-10)) side wall be fixed
Plane A(2-7)；
Swing rod (3) includes: articulated joint, swing rod contact surface A(3-1), hinge hole (3-2), swing rod sliding slot A(3-3), connecting rod (3-4),
Swing rod contact surface B(3-5), swing rod sliding slot B(3-6), the end swing rod sliding slot A (3-7), the end swing rod sliding slot B (3-8), cam it is bent
Face (3-9) and mass block (5)；Swing rod contact surface A(3-1) and swing rod contact surface B(3-5) it is divided into the two sides of articulated joint, swing rod
Sliding slot A(3-3) be arranged in swing rod contact surface A(3-1) in, swing rod sliding slot B(3-6) be arranged in swing rod contact surface B(3-5) in, even
Bar (3-4) connects articulated joint, and mass block (5) connects connecting rod (3-4)；
The shift fork A(4) include: shift fork hole A(4-1), yoke bar A(4-6) and shift fork hole B(4-4)；Shift fork B(8) include:
Shift fork hole C(8-1), yoke bar B(8-6) and shift fork hole D(8-4)；
Torsional spring (6), shift fork A(4) and shift fork B(8) cover on support rod (7), support rod (7) is arranged on pedestal (1), torsion spring set
Cylinder (2) covers on torsional spring (6), and swing rod (3) is covered on torsional spring sleeve (2) by hinge hole (3-2)；
The torsional spring arm A(6-1 of torsional spring (6)) position it is corresponding with the position sliding slot A(2-5), and torsional spring arm A(6-1) U-shaped opening side
To identical as the opening direction of sliding slot A(2-5)；Sliding slot A(2-5) vertex (2-12) and torsional spring arm A(6-1) U-shaped opening bottom
There are distances；
The torsional spring arm B(6-3 of torsional spring (6)) position it is corresponding with the position of sliding slot B(2-10), and torsional spring arm B(6-3) U-shaped open
Mouth direction is identical as the opening direction of sliding slot B(2-10)；Sliding slot B(2-10) vertex (2-12) and torsional spring arm B(6-3) U-shaped
There are distances for open bottom；
Shift fork A(4) yoke bar A(4-6) be stuck in torsional spring arm A(6-1) in, shift fork B(8) yoke bar B(8-6) be stuck in torsional spring arm
B(6-3 in), shift fork hole B(4-4) connection sliding pin A(9-1), sliding pin A(9-1) put in the swing rod sliding slot A(3-3 of swing rod (3)) in,
And can be along swing rod sliding slot A(3-3) mobile, when not in use, sliding pin A(9-1) it is contacted with the end swing rod sliding slot A (3-7)；Swing rod is sliding
Slot A(3-3) with the end swing rod sliding slot A (3-7) be endpoint A(2-5 along the chute) extend in the same direction；Shift fork A(4) and shift fork B(8) make
Used time can be respectively along the sliding slot A(2-5 of torsional spring sleeve (2)) and sliding slot B(2-10) sliding；
Shift fork B(8) shift fork hole D(8-4) connection sliding pin B(9-2), sliding pin B(9-2) put in swing rod sliding slot B into swing rod (3)
In (3-6), when not in use, sliding pin B(9-2) it is contacted with the end swing rod sliding slot B (3-8)；Swing rod sliding slot B(3-6) with swing rod sliding slot B
End (3-8) is endpoint B(2-10 along the chute) it extends in the same direction.
2. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: the articulated joint of swing rod (3)
Bottom is provided with sensor (10), and sensor (10) includes sensor sleeve (10-1), sensor reset spring (10-2) and passes
Sensor slide bar (10-3)；The low side of sensor slide bar (10-3) puts in sensor sleeve (10-1) and can be along sensor sleeve
(10-1) inner wall moves up and down, and sensor is arranged between the upper end and sensor sleeve (10-1) of sensor slide bar (10-3) and resets
Spring (10-2)；The sensor slide bar (10-3) of sensor (10) is in contact with the cam curved surface (3-9) of swing rod (3).
3. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: the torsional spring (6)
Torsional spring inner wall (6-4), shift fork A(4) shift fork hole A(4-1) and shift fork B(8) shift fork hole C(8-1) cover branch in support rod (7)
On strut outer wall (7-3), revolute pair is formed.
4. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: the torsional spring (6)
Torsional spring arm A(6-1) be mounted on shift fork A(4) shift fork contact surface A(4-3) on, the torsional spring arm B(6-3 of torsional spring (6)) be mounted on dial
Pitch B(8) shift fork contact surface C(8-3) on.
5. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: shift fork A(4), shift fork B
(8), torsional spring arm A(6-1) and torsional spring arm B(6-3) can circumferentially be slided along the support rod outer wall (7-3) of support rod (7)；Shift fork
A(4 the torsional spring arm A(6-1 of torsional spring (6)) is pushed by shift fork contact surface A(4-3)) rotation is generated, produce torsional spring (6) torsional deformation
Raw certain torque；Shift fork B(8) pass through shift fork contact surface C(8-3) push torsional spring arm B(6-3) rotation is generated, reverse torsional spring (6)
Deformation generates certain torque.
6. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: torsional spring sleeve is set on (2)
Set mounting groove A(2-4) and mounting groove B(2-9), it is to guarantee shift fork A(4) and shift fork B(8) installation can be facilitated to torsion spring set
The sliding slot A(2-5 of cylinder (2)) and sliding slot B(2-10) in.
7. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: support rod (7) includes branch
Strut end face (7-1), support lever attachment hole (7-2), support rod outer wall (7-3) and support rod end surface (7-4)；Pedestal includes: bottom
Plate (1-1), bottom plate connecting hole (1-2), floor (1-3), connecting plate A(1-4), sleeve connection hole (1-5), support plate connecting hole
(1-6) and connecting plate B(1-7), connecting plate A(1-4) and connecting plate B(1-7) be arranged on bottom plate (1-1), support rod (7) installation
In connecting plate A(1-4) and connecting plate B(1-7) between；Floor (1-3) is two and supports connecting plate A(1-4 respectively) and connecting plate B
(1-7)；Support rod (7) is mounted in the sleeve lining (2-2) of torsional spring sleeve (2), the support lever attachment hole (7- of support rod (7)
2) and the connecting hole (2-1) of torsional spring sleeve (2) be mounted on pedestal (1) connecting plate B(1-7) on support plate connecting hole (1-6) and
On sleeve connection hole (1-5), fixation is bolted.
8. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: shift fork A(4) shift fork hole
B(4-4) and shift fork B(8) shift fork hole D(8-4) respectively with the swing rod sliding slot A(3-3 on swing rod (3)) and swing rod sliding slot B(3-6)
Contact connectio forms sliding pair, is realized by sliding pin (9), the specially swing rod contact surface A(3-1 of sliding pin (9) and swing rod (3)) on
Swing rod sliding slot A(3-3) and swing rod contact surface B(3-5) on swing rod sliding slot B(3-6) connect, and can be sliding along swing rod
Slot A(3-3) and swing rod sliding slot B(3-6) sliding, form sliding pair；Sliding pin (9) is mounted on shift fork A(4) shift fork hole B(4-4) and
Shift fork B(8) shift fork hole D(8-4) on, be threadably secured connection.
9. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: the mass block (5)
For square iron block.
10. middle low frequency impact spectrum torsion spring type measurement pendulum according to claim 1, it is characterised in that: pedestal (1) is logical when use
Bottom plate connecting hole (1-2) is crossed to be mounted on impact experiment machine.
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| CN201710070482.1A CN106768785B (en) | 2017-02-09 | 2017-02-09 | Middle low frequency impact spectrum torsion spring type measurement pendulum |
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| CN114910206B (en) * | 2022-06-20 | 2023-01-10 | 西南交通大学 | In-situ monitoring and early warning device and method for debris flow impact force |
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| GB2266370B (en) * | 1992-04-16 | 1995-07-26 | British Gas Plc | Apparatus for use in testing the surroundings of a buried pipe |
| US5979242A (en) * | 1998-04-20 | 1999-11-09 | Hobbs Engineering Corporation | Multi-level vibration test system having controllable vibration attributes |
| CN100485339C (en) * | 2005-04-11 | 2009-05-06 | 孔丹群 | Revolving body roller swinging device for polar moment of inertia tester |
| CN201277907Y (en) * | 2008-09-26 | 2009-07-22 | 上汽通用五菱汽车股份有限公司 | Real vehicle simulating tail gate air spring experiment apparatus |
| CN203350015U (en) * | 2013-01-05 | 2013-12-18 | 中国航空工业集团公司西安飞机设计研究所 | Externally hung suspension device used for external hung flutter of aerofoil test |
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