CN2331969Y

CN2331969Y - Measuring recording instrument for impact vibration

Info

Publication number: CN2331969Y
Application number: CN 98223837
Authority: CN
Inventors: 李明
Original assignee: Jiuming Impact & Recording Instrument Factory Shanghai
Current assignee: Jiuming Impact & Recording Instrument Factory Shanghai
Priority date: 1998-04-27
Filing date: 1998-04-27
Publication date: 1999-08-04
Anticipated expiration: 2008-04-27

Abstract

The utility model relates to an instrument of integral mechanical structure for measuring and recording impact vibration, which adopts the structure that an inductor, a recording needle and a paper feeding mechanism are installed on a base plate, wherein a support spring is used for hanging a measurement weight in the inductor, an output shaft is interlocked with and drives the recording needle to perform reciprocating movement, the paper feeding mechanism is composed of a swinging plate, a paper feeding shaft, a paper collection shaft and restoring springs, and a ratchet pawl is installed on the swinging plate to push a ratchet wheel of the paper collection shaft to feet paper. The utility model has the advantages that the defects that other measuring instruments can not constantly or automatically measure and record are overcome, a power supply is not needed, and the utility model has wide applicable temperature range, simple structure, convenient installation and low manufacture cost.

Description

Impact shock survey record instrument

The utility model is a kind of surveying instrument of full machinery, specifically a kind of the impact shock of vehicle is recorded in survey record instrument on the recording chart continuously with recording pointer.

Existing impact shock surveying instrument roughly is divided into two classes:

One, be used for the vibratory impulse measured sensor, can accurately measure the acceleration of impact shock, displacement, frequency parameter, its basic structure is for moving by mechanical mechanism one mass when being subjected to impact shock, power or displacement are passed to piezoelectric element, pressure drag component, moving electric device, resistance strain gage, variable resistor element, photovalve, a kind of in the optical element becomes electric signal with the object of which movement conversion of signals, by the feedback desorption system, amplification system converts digital electric signal to, and digital signal can be read, but manual record.

Its major defect has the following aspects: (1) is owing to converting motor message to electric signal, so must be equipped with power supply.Be equipped with power supply, sensor is worked in transit for a long time.As use battery, under the microthermal climate condition, its output current will be subjected to very big influence and make the measuring system cisco unity malfunction; As use generator, and there is the people to guard need, its volume is bigger, and complex structure is prone to fault, can not guarantee the continuous operate as normal of sensor; (2) owing to be digital display,, also reduced its reliability simultaneously so must someone come monitored record; (3) entire mechanism complexity, the separate unit cost price is very high, is unfavorable for the vehicle installation.

Its two, monitor class, its structure are that a mass places between supporting and the elastic bearing, when being subjected to impacting, accekeration surpasses a threshold value, mass breaks away from supporting and elastic restraint, thus whether monitoring vibration impact acceleration value surpasses a certain limit value.

The major defect of this quasi-instrument is: (1) can not continuous coverage impact shock accekeration, when a certain accekeration secondary occurs, and can not duplicate measurements; (2) size that can not the continuous coverage accekeration can not be to the analysis and the record of whole process impact shock acceleration.

The utility model is intended to create a kind of impact shock survey record instrument of pure mechanical mechanism, be not subjected to weather influence (or influence is very little), simple in structure, automatically measure serially, reliably and record impact shock acceleration magnitude, convenient for installation and maintenance, cost is lower.

The technical solution of the utility model is: impact shock survey record instrument, have a base plate, and an inductor is housed on the base plate, it is characterized in that base plate also is equipped with a stylus point and a paper-feeding mechanism; Have a measurement pouring weight to stretch out an output shaft interlock stylus point in the inductor and make shift reciprocately on recording chart, this recording chart is wrapped on the supply-roll and take-up roll of paper-feeding mechanism.

Be described in further detail below in conjunction with embodiment of the present utility model and accompanying drawing thereof.

Fig. 1 is the general assembly structural representation of the utility model embodiment.

Fig. 2 is a sensor structure cut-open view among Fig. 1.

Fig. 3 measures pouring weight, support spring, outer shell combined structure side view among Fig. 2.

Fig. 4 is a two end plates structure side view among Fig. 2.

Fig. 5 is stylus point mounting structure figure among Fig. 1.

Fig. 6 is a pendulum plate structural scheme of mechanism among Fig. 1.

Impact shock survey record instrument shown in Figure 1 has one base plate 1 is installed, and each assembly is installed in and constitutes a complete instrument on this base plate 1, this base plate 1 is installed on the testee, as vehicle compartment again.One inductor 5 mainly is housed, stylus point 19 and a paper-feeding mechanism on base plate 1.

Inductor 5 is used to gather vibration signal, its structure as shown in Figure 2, be in its shell 6, to establish one to measure pouring weight 25, this measurement pouring weight 25 has an output shaft 22 to stretch in outside the shell 6 to be connected with stylus point 19, affixed a pair of support spring 24 in this shell 6, measure pouring weight 25 and be suspended on this on the support spring 24, as shown in Figure 3, a similar pendulum.When measuring pouring weight 25 and experience impact shock, can swing, output shaft 22 swing simultaneously, with the impact shock signal experienced such as amplitude and Frequency Transfer to stylus point 19.Between the two

end plates

4,7 of measuring pouring weight 25 and shell 6, form two air chambers, the vibration of measuring pouring weight 25 is had damping action, therefore, as shown in Figure 4, on two

end plates

4,7, offer damping hole 26, be added with

adjustable plate

3,8 with a screw again, offer adjustment hole 28 on the

adjustable plate

3,8, utilize the area change that overlaps of adjustment hole 28 and damping hole 26, promptly scalable is measured the size of pouring weight 25 suffered dampings.

Stylus point 19 is actually a lever, as shown in Figure 5, the one end is that pencil contacts with recording chart 11 and makes shift reciprocately and depict oscillating curve on recording chart 11, the one fulcrum is socketed on the fixed support 20 of base plate 1, its other end is the force, hinged with a bearing pin 29 and a connecting rod 2, this connecting rod 2 is connected in the output shaft 22 of measuring pouring weight 25.

Recording chart 11 is wrapped on the supply-roll 18 and take-up roll 14 of paper-feeding mechanism, and base plate 1 is provided with a data board 9 and fills up in recording chart 11 times and relative with the pencil of stylus point 19.The structure of paper-feeding mechanism also comprises a pendulum plate 23 as shown in Figure 6, establishes an inertial mass 16 on this pendulum plate 23; One gib screw 17 is connected to pendulum plate 23 on the base plate 1 and is used as the axis of swing of pendulum plate 23; Take-up roll 14 is provided with a ratchet 13, at the upper half and the lower half that contact at ratchet 13 on the take-up roll 14 on the pendulum plate 23 respectively with ratchet 10 in one of bearing pin 21,22 connection and following ratchet 15.Supply-roll 18 is parallel shape with take-up roll 14, is installed on the base plate 1.

When experiencing impact shock, measuring pouring weight 25 on the one hand swings in inductor 5, output shaft 22 interlock stylus points 19 shift reciprocately on recording chart 11, the existence that putting plate 23 simultaneously has an inertial mass 16 serves as that axle is swung with gib screw 17 also, last ratchet 10 and following ratchet 15 promote ratchet 13 rotations and drag recording chart 11, will depict the curve of reflection impact shock amplitude and frequency on the paper.Vibration stops, and record also stops.

Affixed one first torsion spring 30 and one second torsion spring 33 are suppressed respectively in last ratchet 10 and following ratchet 15 on pendulum plate 23, and ratchet 10 and following ratchet 15 are stuck on the ratchet 13 reliably in the pressure, guarantee that ratchet 13 normally drags recording chart 11.

Fix a back-moving spring 32 on base plate 1, the middle part of establishing a latching 31 and back-moving spring 32 on the pendulum plate 23 joins, and inertial mass 16 is set back after swing as early as possible, can realize the bump vibration like this, inertial mass 16 is swung continuously, and ratchet 13 rotates continuously, recording chart 11 continuous feeds.

Good effect of the present utility model shows as: 1, can realize continuously, automatically measure and record punching Hit the size of vibration acceleration value, having overcome other measuring instrument can not continuously or can not measure and record automatically Defective; 2, adopted full mechanical, simple and reliable, easy for installation, manufacturing cost is lower, suitable With environment temperature enlarge, can reach-40 ℃ to 30 ℃, overcome Other Instruments because using electric energy to be suitable for The shortcoming that temperature is restricted; 3, measure through full pattern, its measure error is no more than 5%, reaches survey fully Accuracy of measurement.

Claims

1. impact shock survey record instrument has a base plate, and an inductor is housed on the base plate, it is characterized in that base plate also is equipped with a stylus point and a paper-feeding mechanism; Have a measurement pouring weight to stretch out an output shaft interlock stylus point in the inductor and make shift reciprocately on recording chart, this recording chart is wrapped on the supply-roll and take-up roll of paper-feeding mechanism.

2. impact shock survey record instrument according to claim 1 is characterized in that being provided with in the inductor on the shell that a pair of support spring is fixed in inductor, and described measurement pouring weight is suspended on this on the support spring.

3. impact shock survey record instrument according to claim 1 is characterized in that respectively being provided with a damping hole on the two end plates of inductor shell, and each damping hole is joined an adjustable plate.Adjustable plate is provided with adjustment hole.

4. impact shock survey record instrument according to claim 1 is characterized in that stylus point has a fixed support socket on a fulcrum and the base plate, and a force of stylus point joins with a bearing pin and a connecting rod, and the output shaft of this connecting rod and inductor joins.

5. impact shock survey record instrument according to claim 1 is characterized in that described paper-feeding mechanism also comprises a pendulum plate, establishes an inertial mass on this pendulum plate, and this pendulum plate is connected on the base plate by a gib screw, and is axis of swing with the gib screw; Ratchet and following ratchet contact at the upper half and the lower half of ratchet on the take-up roll on connecting one with bearing pin respectively on the pendulum plate, and supply-roll is parallel with take-up roll, is installed on the base plate.

6. impact shock survey record instrument according to claim 5 is characterized in that putting on the plate affixed one first torsion spring and one second torsion spring and suppresses respectively in last ratchet and following ratchet.

7. impact shock survey record instrument according to claim 5 is characterized in that fixing on the base plate back-moving spring, and the middle part of establishing a latching and back-moving spring on the pendulum plate joins.