CN210005137U - Device for measuring stress of rolling pin in lead screw nut by stress ring method - Google Patents
Device for measuring stress of rolling pin in lead screw nut by stress ring method Download PDFInfo
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- CN210005137U CN210005137U CN201920669264.4U CN201920669264U CN210005137U CN 210005137 U CN210005137 U CN 210005137U CN 201920669264 U CN201920669264 U CN 201920669264U CN 210005137 U CN210005137 U CN 210005137U
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- stress
- nut
- rolling pin
- stress ring
- ring
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005096 rolling process Methods 0.000 title claims description 50
- 238000005259 measurement Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a device of kind stress ring method measuring lead screw nut in roll round pin atress, the nut comprises a nut, be provided with the roll round pin in the nut, still the fixed stress ring sensors that set up on the nut, sensor and the contact of roll round pin upper end outside, be provided with the bush on the nut, suit marking shaft in the bush, be provided with the hole of position coincidence on marking shaft and the bush, roll round pin lower extreme stretches into in the hole on marking shaft and the bush, mark the back through marking shaft, the atress condition of roll round pin when sensors can measure the positive and negative two directions of lead screw and move, through sensors, the two-dimensional atress condition of measurable quantity roll round pin, effectively solve the problem that exists in the atress detection of roll round pin among the prior art.
Description
Technical Field
The invention relates to rolling pin stress detection in a lead screw nut, and belongs to the technical field of rail transit equipment detection.
Background
The motion mechanism of the existing railway vehicle system is generally a screw nut, two nuts are respectively arranged on a double-head screw, two rolling pins are arranged in each nut, the screw is in contact with the rolling pins when moving, the installation of key parts in the railway vehicle system directly influences the operation stability and the service life of , the installation quality is closely related to the stress of the rolling pins, and the installation parameters of the key parts are determined by measuring the stress condition of the rolling pins for guiding the installation and maintenance of the system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a device for measuring the stress of a rolling pin in a lead screw nut by using stress ring methods, which is characterized in that stress ring sensors are adopted in ①, the stress can be applied in the positive and negative directions, four resistance strain gauges are attached to the circumference of planes on the ② stress ring sensors, the stress of the rolling pin is obtained by calculation according to the measurement data of the four resistance strain gauges, which form 90 degrees, ③, ④ is calibrated, the stress of the rolling pin is directly measured, and the force of the ⑤ force sensors is automatically zeroed by software.
In order to achieve the aim, the invention is realized by the following technical scheme:
A device for measuring the stress of a rolling pin in a screw nut by a stress ring method comprises a nut, wherein the rolling pin is arranged in the nut, stress ring sensors are fixedly arranged on the nut and are in contact with the outer side of the upper end of the rolling pin, a bushing is arranged on the nut, a calibration shaft is sleeved in the bushing, holes with overlapped positions are formed in the calibration shaft and the bushing, and the lower end of the rolling pin extends into the holes in the calibration shaft and the bushing.
The stress ring sensor is an elastic part and is circular, and four resistance strain gauges are arranged on the surface of the elastic part, which is in contact with the rolling pin, and the four resistance strain gauges form an angle of 90 degrees with each other.
Wherein, stress ring sensor is provided with recess and hole above.
The upper end of the rolling pin is provided with a pressing ring, and the pressing ring is fixed on the rolling pin through a countersunk head bolt at the upper end of the rolling pin.
Wherein, be provided with the bearing in the nut, the roll pin is supported by the bearing, sets up the retaining ring on the nut, and the retaining ring is fixed the bearing in the nut.
Wherein, be provided with the clamp plate in the nut, the end cover is fixed the sensor in the nut.
The stress ring sensor adopts a resistance strain gauge BFH120-3 AA.
Has the advantages that: the invention has the following beneficial effects:
after the calibration of the calibration shaft, stress ring sensors can measure the stress conditions of the rolling pin when the screw rod moves in the positive and negative directions, so that the two-dimensional stress conditions of the rolling pin are calculated, and the problems existing in the stress detection of the rolling pin in the prior art are effectively solved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of a stress ring sensor.
Fig. 3 is a schematic structural view of the pressing plate.
Figure 4 is a schematic view of the pressure ring.
Fig. 5 is a schematic view of a roll pin.
In the figure, 1-nut, 2-rolling pin, 3-bearing, 4-pressing ring, 5-check ring, 6-countersunk bolt, 7-stress ring sensor, 8-hexagon bolt, 9-hexagon socket bolt, 10-hexagon nut, 11-pressing plate, 12-bush, 13-calibration shaft, 21- th resistance strain gauge, 22-second resistance strain gauge, 23-third resistance strain gauge and 24-fourth resistance strain gauge.
Detailed Description
The invention is further described with reference to the following figures.
As shown in figure 1, the stress ring method stress measurement device for the rolling pin in the lead screw nut comprises a nut 1, wherein a rolling pin 2 is arranged in the nut 1, stress ring sensors 7 are fixedly arranged on the nut 1 and are in contact with the outer side of the upper end of the rolling pin 2, a bushing 12 is arranged on the nut 1, a calibration shaft 13 is sleeved in the bushing 12, holes with overlapped positions are formed in the calibration shaft 13 and the bushing 12, the lower end of the rolling pin 2 extends into the holes in the calibration shaft 13 and the bushing 12, a pressing ring 4 is arranged at the upper end of the rolling pin 2, the pressing ring 4 is fixed on the rolling pin 2 through a countersunk head bolt 6, the pressing ring 4 is used for ensuring that the position of a contact point of the rolling pin 2 and the stress ring sensor 7 is unchanged when the rolling pin 2 is stressed and inclined, a bearing 3 is arranged in the nut 1, the rolling pin 2 is supported by the bearing 3, a check ring 5 is arranged on the nut 1, the bearing 3 is fixed in the nut 1 through the check ring 5, a pressing plate 11 is arranged on the nut 1, the pressing plate 11 is fixedly arranged on the pressing plate 11 through a bolt 8 and a hexagonal nut 10.
As shown in fig. 2, the stress ring sensor is an annular elastic element, and four resistive strain gauges , 21, 22, 23, and 24 are provided on a surface of the stress ring sensor which is in contact with the roll pin 2 at an angle of 90 ° to each other.
The bearing 3 of the present invention is a self-aligning ball bearing, which is mounted on the roll pin 2. The press ring 4 is arranged on the rolling pin 2 and fixed by a countersunk head bolt 6. The resistance strain gage attached to the stress ring sensor 7 is connected to a bridge of a dynamic resistance strain gauge, the resistance strain gauge is connected with a data acquisition and signal analyzer, the data acquisition and signal analyzer is connected with a computer, and the computer records the acquired force data in real time through software.
Before measurement, calibration is needed, a bushing 12 is installed in a nut 1, a customized calibration shaft 13 is installed, then a rolling pin 2 component, a stress ring sensor 7 and the like are installed, after assembly is completed, a load xi (KN) is applied to the calibration shaft 13, data yi read by data acquisition and analysis software is recorded, the relation between the data yi and f (xi) is found out, the calibrated functional relation is input into the software, the data read by the software is used for calibrating the parameters of a resistance strain gauge 21 and a second resistance strain gauge 22, the stress magnitude of the rolling pin 2 is calculated, the stress ring sensor 7 is rotated by 90 degrees, the parameters of the second resistance strain gauge 22 and the third resistance strain gauge 23 can be calibrated, the parameters of the third resistance strain gauge 23 and the fourth resistance strain gauge 24 are calibrated, the parameters of the fourth resistance strain gauge 24 and the resistance strain gauge 21 are calibrated, the stress ring sensor 7 is installed on the rolling pin 2, and the two-dimensional condition of the stress ring sensor 2 can be detected.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (9)
- The device for measuring stress of the rolling pin in the screw nut by using the stress ring method is characterized by comprising a nut (1), wherein the rolling pin is arranged in the nut (1), stress ring sensors (7) are fixedly arranged on the nut (1), the stress ring sensors (7) are in contact with the outer side of the upper end of the rolling pin (2), a bushing (12) is arranged on the nut (1), a calibration shaft (13) is sleeved in the bushing (12), holes with overlapped positions are formed in the calibration shaft (13) and the bushing (12), and the lower end of the rolling pin (2) extends into the holes in the calibration shaft (13) and the bushing (12).
- 2. The device for measuring the stress of the rolling pin in the lead screw nut by the stress ring methods according to claim 1, wherein the upper end of the rolling pin (2) is provided with a press ring (4), and the press ring (4) is fixed on the rolling pin (2) through a countersunk head bolt (6) at the upper end of the rolling pin (2).
- 3. The kind of stress ring method measurement lead screw nut of claim 1, wherein the nut (1) has a bearing (3) inside, and the roll pin (2) is supported by the bearing (3).
- 4. The kind of stress ring method measurement lead screw nut roll pin atress device according to claim 3, characterized in that sets up retaining ring (5) on nut (1), and retaining ring (5) are fixed the bearing in the nut.
- 5. The kind of stress ring method for measuring the stress of rolling pin in screw nut according to claim 1, wherein the stress ring sensor (7) is an elastic part, circular, four resistance strain gauges are set on the back of the elastic part contacting with the rolling pin, and they are at 90 ° to each other.
- 6. The kind of stress ring method measurement lead screw nut in the device of the rolling pin atress of claim 2, characterized in that, stress ring sensor (7) is provided with the recess, and the recess is used for stress ring sensor (7) radial fixation, and when the rolling pin (2) worked, the stress ring can not rotate.
- 7. The device for measuring the stress of the rolling pin in the screw nut by the stress ring method according to claim 2, wherein the stress ring sensor (7) is provided with a hole, and a hexagon bolt (8) and a hexagon nut (10) are arranged in the hole and used for axially fixing the stress ring.
- 8. The device for measuring the stress of the rolling pin in the screw nut according to the stress ring methods of claim 1, wherein the nut (1) is provided with a pressure plate (11), the pressure plate (11) is provided with a cross-shaped notch for fixing the radial direction of the stress ring, the stress ring sensor (7) is fixedly arranged below the pressure plate (11) through a hexagon bolt (8) and a hexagon nut (10), and the pressure plate (11) is fixed on the nut (1) through an inner hexagon bolt (9).
- 9. The device for measuring the stress of the rolling pin in the lead screw nut by the stress ring methods according to claim 1, wherein the stress ring sensor (7) adopts a resistance strain gauge BFH120-3 AA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920669264.4U CN210005137U (en) | 2019-05-10 | 2019-05-10 | Device for measuring stress of rolling pin in lead screw nut by stress ring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920669264.4U CN210005137U (en) | 2019-05-10 | 2019-05-10 | Device for measuring stress of rolling pin in lead screw nut by stress ring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210005137U true CN210005137U (en) | 2020-01-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920669264.4U Expired - Fee Related CN210005137U (en) | 2019-05-10 | 2019-05-10 | Device for measuring stress of rolling pin in lead screw nut by stress ring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210005137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006561A (en) * | 2019-05-10 | 2019-07-12 | 南京工程学院 | A kind of device of roller bolt stress in the around-France measurement feed screw nut of stress |
-
2019
- 2019-05-10 CN CN201920669264.4U patent/CN210005137U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006561A (en) * | 2019-05-10 | 2019-07-12 | 南京工程学院 | A kind of device of roller bolt stress in the around-France measurement feed screw nut of stress |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200131 |
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| CF01 | Termination of patent right due to non-payment of annual fee |