CN217155666U - Turnout switch resistance force measuring bolt capable of stably measuring force - Google Patents
Turnout switch resistance force measuring bolt capable of stably measuring force Download PDFInfo
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- CN217155666U CN217155666U CN202220979438.9U CN202220979438U CN217155666U CN 217155666 U CN217155666 U CN 217155666U CN 202220979438 U CN202220979438 U CN 202220979438U CN 217155666 U CN217155666 U CN 217155666U
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Abstract
The utility model provides a turnout conversion resistance force measuring bolt capable of stably measuring force, which comprises a bolt body, wherein the bolt body is internally provided with strain holes and comprises three stress parts and two deformation parts, and the three stress parts are arranged at intervals along the axial direction of the bolt body; each section of deformation part is positioned between two adjacent sections of stress parts; each section of the stress part is provided with an annular rib structure, and the diameter of the rib structure is larger than that of any other part of the stress part; the distance between the convex rib structure on the middle stress part and the convex rib structures on the two adjacent stress parts along the axial direction of the bolt body is equal. The rib structures of the three stress parts are opposite to the center parts of the hole walls of the three pin holes of the fork-shaped iron one by one, and the force action points are always positioned in the middle of the stress parts, so that the equal torque between the middle stress part and the two adjacent stress parts is ensured, the stress of the strain gauge in the strain hole is balanced, and the data monitored each time is stable and accurate.
Description
Technical Field
The utility model relates to a railway monitoring facilities field particularly, relates to a can stabilize switch conversion resistance dynamometry bolt of dynamometry.
Background
The railway turnout conversion comprises three processes of unlocking, conversion and locking, in order to ensure the running safety of a train, various mechanical parameters of turnout operation need to be detected regularly, the values of the mechanical parameters are directly related to the running condition of the turnout, and many faults of the turnout are also related to the mechanical parameters. Therefore, the working condition of the turnout is known and mastered by regularly measuring the mechanical parameters, and when the turnout conversion resistance exceeds a normal range, the turnout and the roadbed are correspondingly overhauled, so that the turnout conversion resistance is restored to the normal range.
At present, when the switch resistance of a turnout is monitored, a specific force measuring bolt is adopted, the shape of the force measuring bolt is similar to that of the bolt, and a force measuring sensor is arranged inside the force measuring bolt; during actual work, the force measuring bolt is inserted into the pin hole of the action pull rod and the fork iron, so that the effect of connecting the action pull rod and the fork iron is achieved, and meanwhile, the conversion resistance of the turnout is monitored through the action pull rod and the fork iron.
The existing force measuring bolt comprises three stress parts which are arranged at intervals along the axial direction, and when the force measuring bolt is inserted into pin holes of an action pull rod and fork-shaped iron, the three stress parts respectively correspond to one pin hole of the action pull rod and two pin holes of the fork-shaped iron one by one, so that the force transmission is realized. In order to ensure the stability and accuracy of data monitoring, the moments between the middle stress part and the two adjacent stress parts should be equal to ensure the stress balance of the strain gauges in the bolt; the outer side wall of each stress part is a cylindrical surface, and due to the influence of machining precision and the influence of long-term abrasion between each action pull rod, the fork-shaped iron and the three stress parts, the distance between the actual stress point of the middle stress part and the actual stress point of the two adjacent stress parts can deviate and cannot be fixed, so that the stress of the strain gauge inside the bolt cannot be balanced and is in a dynamic change process, and finally, the monitored data is inaccurate and unstable.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a can stabilize switch conversion resistance dynamometry bolt of dynamometry to the deviation appears easily in the stress point of the dynamometry bolt among the at least prior art and leads to the inaccurate and unstable problem of data of monitoring.
In order to realize the above-mentioned purpose, the utility model provides a can stabilize switch conversion resistance dynamometry bolt of dynamometry, including the bolt body, the internal portion of bolt has the strain hole of seting up along its axial lead direction, and the bolt body includes: the stress part is three sections which are arranged at intervals along the axial direction of the bolt body; the deformation part is divided into two sections, and each section of deformation part is positioned between two adjacent sections of stress parts; each section of stress part is provided with an annular rib structure along the central line direction around the circumference of the stress part, and the diameter of the rib structure is larger than that of any other part of the stress part; the distance between the convex rib structure on the middle stress part and the convex rib structures on the two adjacent stress parts along the axial direction of the bolt body is equal.
Further, the width of the rib structure in the axial direction of the bolt body is 1 to 5 mm.
Furthermore, the outer surface of the rib structure is of a cambered surface structure.
Furthermore, two annular transition areas are formed in the areas between the two annular side edges of the rib structure and the two annular side edges of the stress part, and the longitudinal section line of the outer wall of each annular transition area is of an arc line structure.
Furthermore, the two annular transition areas are mutually symmetrical and form a complete arc surface structure with the rib structure.
Furthermore, two annular transition areas are formed in the area between the two annular side edges of the rib structure and the two annular side edges of the stress part, and the longitudinal section line of the outer wall of each annular transition area is of a diagonal line structure.
Furthermore, the extension lines of the longitudinal sectional lines of the outer walls of the two annular transition areas are symmetrical with each other to form two waists of an isosceles triangle.
Further, the load cell bolt further comprises: the two pairs of strain gauges are attached to the strain holes at intervals along the axial direction of the bolt body; the two pairs of strain gauges are opposite to the two sections of deformation parts one by one, and the two strain gauges in each pair are opposite to each other along the radial direction of the bolt body.
The turnout conversion resistance force measuring bolt capable of stably measuring force comprises a bolt body, wherein a strain hole is formed in the bolt body along the axial lead direction of the bolt body, the bolt body comprises a stress part and a deformation part, the stress part is three sections, and the three sections of stress parts are arranged at intervals along the axial lead direction of the bolt body; the deformation part is divided into two sections, and each section of deformation part is positioned between two adjacent sections of stress parts; each section of stress part is provided with an annular rib structure along the central line direction around the circumference of the stress part, and the diameter of the rib structure is larger than that of any other part of the stress part; the distance between the convex rib structure on the middle stress part and the convex rib structures on the two adjacent stress parts along the axial direction of the bolt body is equal. In the working process after the bolt body is inserted into the pin holes of the action pull rod and the fork-shaped iron, the rib structures of the three stress parts are opposite to the center parts of the pin hole walls of the action pull rod and the three pin holes of the fork-shaped iron one by one and are mutually abutted, the force action point is always positioned in the middle of the stress part, and the moment between the middle stress part and the two adjacent stress parts is ensured to be equal, so that the stress of the strain gauge in the strain hole is balanced, and the data monitored each time is stable and accurate. The problem of among the prior art force measuring bolt's stress point deviate easily and lead to inaccurate and unstable data of monitoring is solved.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic longitudinal sectional view of an alternative switch transition resistance force measuring bolt capable of stably measuring force according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of an alternative switch transition resistance force-measuring bolt capable of measuring force stably according to an embodiment of the present invention;
fig. 3 is a schematic view of an alternative installation structure of a switch transition resistance force measuring bolt capable of stably measuring force according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a force receiving portion of an alternative turnout transition resistance force measuring bolt capable of stably measuring force according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of another force-receiving portion of an alternative switch transition resistance force-measuring bolt capable of stabilizing force measurement according to an embodiment of the present invention.
Wherein the figures include the following reference numerals:
10. a bolt body; 11. strain holes; 12. a force receiving portion; 121. an annular transition zone; 13. a deformation section; 14. a rib structure; 20. a strain gauge; 30. an action pull rod; 40. fork iron.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The switch conversion resistance force measuring bolt capable of stably measuring force provided by the embodiment of the utility model, as shown in fig. 1 to fig. 3, comprises a bolt body 10, wherein a strain hole 11 arranged along the axial lead direction is arranged in the bolt body 10, the bolt body 10 comprises a stress part 12 and a deformation part 13, the stress part 12 is three sections, and the three sections of stress parts 12 are arranged along the axial lead direction of the bolt body 10 at intervals; the deformation part 13 is divided into two sections, and each section of deformation part 13 is positioned between two adjacent sections of stress parts 12; each section of the stress part 12 is provided with an annular rib structure 14 in the central line direction around the circumference of the stress part, and the diameter of the rib structure 14 is larger than that of any other part of the stress part 12; the ridge structure 14 on the middle force-receiving part 12 is equally spaced from the ridge structure 14 on the two adjacent force-receiving parts 12 along the axial direction of the bolt body 10. In the working process after the bolt body 10 is inserted into the pin holes of the action pull rod 30 and the fork iron 40, the rib structures 14 of the three stress parts 12 are opposite to the center parts of the hole walls of the three pin holes of the action pull rod 30 and the fork iron 40 one by one and are mutually abutted, the force action point is always positioned in the middle of the stress part 12, the moment between the middle stress part 12 and the two adjacent stress parts 12 is ensured to be equal, so that the stress of the strain gauge in the strain hole 11 is balanced, and the data monitored each time is stable and accurate. The problem of among the prior art force measuring bolt's stress point deviate easily and lead to inaccurate and unstable data of monitoring is solved.
In specific implementation, the width of the ridge structure 14 along the axial direction of the bolt body 10 is 1 to 5mm, the specific width is determined according to the width of the force-receiving portion 12, and the width of the ridge structure 14 in this embodiment is 2 mm.
In order to effectively reduce stress concentration and reduce abrasion between the stress part 12 and the pin hole walls of the action pull rod 30 and the fork iron 40, further, the outer surface of the rib structure 14 is of a cambered surface structure; namely, the longitudinal section of the outer wall of the rib structure 14 is an arc line; therefore, stress points are concentrated in the middle of the rib structure 14, the accuracy of the positions of the contact parts of the stress part 12 and the pin hole wall of the action pull rod 30 and the fork iron 40 can be improved, and meanwhile, stress and friction can be reduced.
Further, two annular transition areas 121 are formed in the areas between the two annular sides of the rib structure 14 and the two annular sides of the force-receiving portion 12, the diameters of the two annular transition areas 121 gradually decrease along the direction from the rib structure 14 to the two annular sides of the force-receiving portion 12, and the two annular transition areas 121 are not in contact with the pin hole walls of the action pull rod 30 and the fork iron 40 in the actual working process.
In practical applications, the annular transition region 121 of the force-receiving portion 12 may be specifically configured as follows:
example 1:
in this embodiment, as shown in fig. 4, the longitudinal sectional line of the outer wall of the two annular transition areas 121 of the force-receiving portion 12 is an arc structure, and the two annular transition areas 121 are symmetrical to each other and form a complete arc structure with the rib structure 14; the structural form is convenient to process and has small stress.
Example 2:
in this embodiment, as shown in fig. 5, the longitudinal section line of the outer wall of the two annular transition areas 121 of the force-receiving portion 12 is a diagonal line structure; the extensions of the longitudinal sectional lines of the outer walls of the two annular transition areas 121 are symmetrical to each other to form two legs of an isosceles triangle.
Further, as shown in fig. 1, the force measuring bolt further includes two pairs of strain gauges 20, and the two pairs of strain gauges 20 are attached to the strain holes 11 at intervals along the axial direction of the bolt body 10; two pairs of strain gauges 20 and two sections of deformation parts 13 are opposite to each other in the radial direction of the bolt body 10, and the two strain gauges 20 of each pair are opposite to each other in the radial direction of the bolt body 10.
During specific work, as shown in fig. 3, after the force measuring bolt is inserted into the pin holes of the action pull rod 30 and the fork iron 40, along with the work of the switch machine, the rib structures 14 on the middle stress part 12 are abutted to the axial midpoint positions of the hole walls of the pin holes of the action pull rod 30, and the rib structures 14 on the two stress parts 12 at the two ends are abutted to the axial midpoint positions of the hole walls of the two pin holes of the fork iron 40; so that the middle stress-bearing part 12 and the two adjacent stress-bearing parts 12 are subjected to opposite acting forces; because the distance between the rib structure 14 on the middle stress part 12 and the rib structure 14 on the two adjacent stress parts 12 along the axial direction of the bolt body 10 is equal, the two sections of deformation parts 13 are deformed with the same size, and then the upper and lower two pairs of strain gauges 20 attached in the strain holes 11 are deformed in a balanced manner, so that the accuracy of monitoring data is ensured. The four strain gages 20 are connected into a bridge circuit, corresponding voltage E is added to the bridge circuit, when the resistance values of resistance wires on the four strain gages 20 change correspondingly, the output voltage V changes correspondingly, the deformation size of the two sections of deformation parts 13 can be calculated by monitoring the change of the voltage V, and then the conversion resistance of the turnout when the action pull rod 30 applies force to the fork-shaped iron 40 is measured.
In addition, after the force measuring bolt is inserted into the pin hole of the action pull rod 30 and the fork iron 40 each time, the position of the stress point of each stress part 12 is fixed, so that the data deviation of multiple times of measurement is very small, the required error range is basically met, and the stability of the measured data is high.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The switch conversion resistance force-measuring bolt capable of stably measuring force is characterized by comprising a bolt body (10), wherein a strain hole (11) formed in the bolt body (10) along the axial lead direction of the bolt body is provided, and the bolt body (10) comprises:
the stress part (12) is three in number, and the three stress parts (12) are arranged at intervals along the axial direction of the bolt body (10);
the deformation part (13) is divided into two sections, and each section of deformation part (13) is positioned between two adjacent sections of stress parts (12);
each section of the stress part (12) is provided with an annular rib structure (14) in the central line direction around the circumference of the stress part, and the diameter of the rib structure (14) is larger than that of any other part of the stress part (12); the interval between the rib structures (14) on the middle stress part (12) and the rib structures (14) on the two adjacent stress parts (12) along the axial direction of the bolt body (10) is equal.
2. The switch transition resistance dynamometric bolt of claim 1, wherein said rib structure (14) has a width along the axis of said bolt body (10) of 1 to 5 mm.
3. The switch transition resistance dynamometric bolt of claim 2, wherein the exterior surface of said rib structure (14) is a cambered surface structure.
4. The turnout conversion resistance dynamometric bolt capable of stabilizing dynamometry as claimed in claim 3, wherein the area between the two annular sides of said rib structure (14) and the two annular sides of said force receiving portion (12) forms two annular transition areas (121), the longitudinal section line of the outer wall of the two annular transition areas (121) being of an arc line structure.
5. The switch transition resistance dynamometric bolt of claim 4, wherein the two annular transition regions (121) are symmetrical to each other and form a complete arc with the rib structure (14).
6. The turnout conversion resistance force-measuring bolt capable of stably measuring force according to claim 3, wherein the area between the two annular side edges of the rib structure (14) and the two annular side edges of the force-receiving part (12) forms two annular transition areas (121), and the longitudinal section line of the outer wall of the two annular transition areas (121) is a diagonal line structure.
7. The switch transition resistance dynamometric bolt of claim 6, wherein the extensions of the longitudinal section lines of the outer walls of the two annular transition areas (121) are symmetrical to each other to form the two legs of an isosceles triangle.
8. The switch transition resistance dynamometric bolt of claim 1, wherein said dynamometric bolt further comprises:
the strain gauges (20), the strain gauges (20) are two pairs, and the two pairs of strain gauges (20) are attached to the strain holes (11) at intervals along the axial direction of the bolt body (10);
the two pairs of strain gauges (20) are opposite to the two sections of deformation parts (13) one by one, and the two strain gauges (20) of each pair are opposite to each other in the radial direction of the bolt body (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220979438.9U CN217155666U (en) | 2022-04-26 | 2022-04-26 | Turnout switch resistance force measuring bolt capable of stably measuring force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220979438.9U CN217155666U (en) | 2022-04-26 | 2022-04-26 | Turnout switch resistance force measuring bolt capable of stably measuring force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217155666U true CN217155666U (en) | 2022-08-09 |
Family
ID=82661653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220979438.9U Active CN217155666U (en) | 2022-04-26 | 2022-04-26 | Turnout switch resistance force measuring bolt capable of stably measuring force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217155666U (en) |
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2022
- 2022-04-26 CN CN202220979438.9U patent/CN217155666U/en active Active
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