CN212340161U - Helical spring foil gage protection device - Google Patents
Helical spring foil gage protection device Download PDFInfo
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- CN212340161U CN212340161U CN202020806515.1U CN202020806515U CN212340161U CN 212340161 U CN212340161 U CN 212340161U CN 202020806515 U CN202020806515 U CN 202020806515U CN 212340161 U CN212340161 U CN 212340161U
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- coil spring
- protection device
- foil gage
- protection
- gage
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Abstract
The utility model discloses a coil spring foil gage protection device belongs to mechanical technical field, including coil spring, foil gage, protecting support, protection apron and ribbon, the foil gage is fixed on coil spring, and the left and right sides of foil gage is fixed with the protecting support respectively, and the protecting support cover is on coil spring, and the protecting cover board is fixed on the protecting support, and the protecting support passes through the ribbon with the protecting cover board and fixes on coil spring. This protection device installs the spring foil gage in this fixing device and protects to avoided the harm of various mechanical external force that the accident caused the foil gage in various experimental preparation and long-term test process, this fixing device can effectively improve coil spring's foil gage's survival rate, has simple structure, with low costs, long service life, easy operation convenience and the good characteristics of portability, this has important meaning to engineering application.
Description
Technical Field
The utility model belongs to the technical field of machinery, concretely relates to coil spring foil gage protection device.
Background
In the process of product development, the automobile suspension helical spring is widely applied to an independent suspension, particularly a front wheel independent suspension. The coil spring has the following advantages: lubrication is not needed, and mud pollution is not avoided; the required longitudinal installation space is not large; the spring has small mass. Therefore, the displacement test data of the automobile suspension helical spring also becomes a matter of great concern for various automobile manufacturers.
At present, in the whole vehicle test work, the displacement of a key part is collected and analyzed, so that the use requirement of the whole vehicle is met, and the reliability of the corresponding part is necessarily improved. In the whole vehicle durability test work, displacement variation of components is often required to be measured by using displacement sensors of different types, wherein the main test method of the work displacement test of the automobile suspension helical spring is to use the displacement sensors for measurement. The main defect of the displacement sensor test is that due to the limitation of space, sometimes the displacement sensor is difficult to install, so that the test result is influenced, and the test precision is influenced, the currently widely-used cylindrical helical spring of the automobile suspension is a research object, two resistance strain gauges are respectively pasted on the middle section of the cylindrical helical spring in the +/-45-degree directions of two adjacent side surfaces which are symmetrical relative to the plane passing through the central axis of the spring and the axis of a spring wire, the two side surfaces of the selected pasted strain gauge are preferably not located on the whole flexible surface of the helical spring, wherein the first resistance strain gauge and the second resistance strain gauge are pasted on the one side surface, the third resistance strain gauge and the fourth resistance strain gauge are pasted on the other side surface of the symmetry, the first resistance strain gauge and the second resistance strain gauge form a half bridge, and the third resistance strain gauge and the fourth resistance strain gauge form another half bridge. The linear actuator testing machine is used for carrying out a coil spring compression test, the displacement at different moments at each time is recorded, two half-bridge strain values at different moments are recorded by a strain gauge until the displacement reaches the maximum displacement and then are unloaded, the strain and the displacement are input into a computer, the relation between the coil spring displacement and the test strain is obtained, and then the accurate test of the coil spring displacement can be realized; however, in the actual process, the coil spring assembly calibrated by the rack is damaged due to unexpected mechanical external force applied to the strain gauge in the process of mounting the coil spring assembly on the whole vehicle and in the process of road test.
SUMMERY OF THE UTILITY MODEL
Very high in order to overcome the cost of import foil gage, have the harm scheduling problem to the spring foil gage in the test process, the utility model provides a coil spring foil gage protection device, the utility model discloses install the spring foil gage and protect in this fixing device to avoid preparing and the long-term test in various experimental preparation to the unexpected damage of various mechanical external force that causes of foil gage, this fixing device can effectively improve coil spring's foil gage's survival rate, has simple structure, with low costs, long service life, characteristics that easy operation is convenient and portability is good, this has important meaning to engineering application.
The utility model discloses a following technical scheme realizes:
the utility model provides a coil spring foil gage protection device, includes coil spring 1, foil gage, protecting support 2, protection cover plate 3 and ribbon 4, the foil gage is fixed on coil spring 1, and the left and right sides of foil gage is fixed with protecting support 2 respectively, and protecting support 2 covers is on coil spring 1, and protection cover plate 3 is fixed on protecting support 2, and protecting support 2 and protection cover plate 3 pass through ribbon 4 to be fixed on coil spring.
The protection support 2 is rectangular, and the right end face of rectangle is opened there is the semicircle orifice for the suit is on coil spring 1, and it has bolted connection hole 7 to open on the rectangular left end face, is used for with 3 fixed connection of protection apron.
The upper end face and the lower end face of the protection support 2 are respectively provided with a fixing groove 6 for allowing the binding belt 4 to pass through.
The protection support 2 is fixedly connected with the protection cover plate 3 through a fixing bolt 5.
The number of the bolt connecting holes 7 is two.
The distance between the protection bracket 2 and the left side and the right side of the strain gauge is 5 mm.
The protective bracket 2 and the protective cover plate 3 are made of resin materials.
The protective cover plate 3 is groove-shaped, and the end face is provided with a plurality of bolt connecting holes for penetrating through the fixing bolts 5 to be connected with the protective bracket 2.
The strain gauge is attached to the middle position of the coil spring 1.
Compared with the prior art, the utility model has the advantages as follows:
the utility model discloses a coil spring foil gage protection device has avoided the harm of various mechanical external force that causes the foil gage accident in various experimental preparation and long-term test process, and this fixing device can effectively improve coil spring's foil gage's survival rate, and this fixing device has simple structure, with low costs, long service life, easy operation convenience and the good characteristics of portability, and this has important meaning to engineering application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural view of a coil spring strain gage protection device of the present invention;
fig. 2 is a schematic structural view of a protection bracket of the protection device for a coil spring strain gage of the present invention;
fig. 3 is a schematic structural view of a protective cover plate of the protection device for a coil spring strain gauge of the present invention;
FIG. 4 is a schematic view of a spring strain gage mounting location;
in the figure: the method comprises the following steps of 1-spiral spring, 2-protective support, 3-protective cover plate, 4-binding belt, 5-fixing bolt, 6-fixing groove and 7-bolt connecting hole.
Detailed Description
Embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the following embodiments are merely used to more clearly illustrate the technical solutions of the present invention, and therefore are only used as examples, and the protection scope of the present invention cannot be limited thereby.
It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.
Example 1
As shown in fig. 1, a coil spring strain gage protection device comprises a coil spring 1, a strain gage, a protection bracket 2, a protection cover plate 3 and a binding belt 4, wherein when the displacement of a suspension coil spring is measured, the installation position of the strain gage of the coil spring in the whole vehicle state is generally considered, and a proper strain and protection device fixing installation position is determined to avoid interference with other moving parts of the vehicle; the strain gauge is fixed on the spiral spring 1, the mounting position of the protective bracket 2 is selected according to the mounting position of the strain gauge, in the embodiment, the protective bracket 2 is mounted at a position 5mm away from the left side of the strain gauge, and the protective bracket 2 is mounted at a position 5mm away from the right side of the strain gauge; the protection support 2 is sleeved on the spiral spring 1, the two ends of the protection cover plate 3 are installed on the protection support 2 on the left side and the right side through the fixing bolts 5 and the bolt connecting holes 7, and the protection support 2 and the protection cover plate 3 are integrally fixed on the spiral spring 1 through the fixing grooves 6 by using the binding belts 4.
As shown in fig. 2, the protection bracket 2 is rectangular, a semicircular hole is formed on the right end face of the rectangle for being sleeved on the coil spring 1, and a bolt connecting hole 7 is formed on the left end face of the rectangle for being fixedly connected with the protection cover plate 3.
The upper end face and the lower end face of the protection support 2 are respectively provided with a fixing groove 6 for allowing the binding belt 4 to pass through.
The protective bracket 2 and the protective cover plate 3 are made of resin materials.
As shown in fig. 3, the protective cover plate 3 is groove-shaped, the end face of the protective cover plate is provided with a plurality of bolt connecting holes for passing through the fixing bolts 5 to be connected with the protective bracket 2, and the length of the long side of the rectangular protective bracket 2 is matched with the size of the groove of the protective cover plate 3.
As shown in fig. 4, two resistance strain gauges are respectively stuck at the middle position of the spring wire and in the direction of +/-45 degrees with respect to the axis of the spring wire on two adjacent side surfaces which are symmetrical relative to the plane passing through the central axis of the spring at the middle position of the cylindrical spiral spring, wherein the first resistance strain gauge epsilon1And a second resistance strain gauge epsilon2A third resistance strain gauge epsilon adhered to the one side surface3And a fourth resistance strain gauge ε4A first resistance strain gauge epsilon adhered to the other side face of the symmetry1And a second resistance strain gauge epsilon2Forming a half-bridge, a third resistance strain gauge epsilon3And a fourth resistance strain gauge ε4Another half-bridge is formed, bridging the two halves into the strain gauge.
Taking an automobile cylindrical helical spring as an example, the basic steps of the test operation comprise:
1. taking an automobile cylindrical spiral spring as an object;
2. as shown in fig. 4, two resistance strain gauges are respectively stuck at the middle position of the spring wire and in the direction of +/-45 degrees with the axis of the spring wire on two adjacent side surfaces which are symmetrical relative to the plane passing through the central axis of the spring and are selected at the middle position of the cylindrical spiral spring, wherein the first resistance strain gauge epsilon1And a second resistance strain gauge epsilon2A third resistance strain gauge epsilon adhered to the one side surface3And a fourth resistance strain gauge ε4A first resistance strain gauge epsilon adhered to the other side face of the symmetry1And a second resistance strain gauge epsilon2Forming a half-bridge, a third resistance strain gauge epsilon3And a fourth resistance strain gauge ε4Forming another half bridge, and bridging the two half bridges into the strain gauge;
3. the spiral spring strain gage protection device of the utility model is arranged on the cylindrical spiral spring;
4. utilize linear actuator testing machine to carry out coil spring compression test, note the displacement at different moments at every turn, note two half-bridge strain values at different moments with the strainometer.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (9)
1. The utility model provides a coil spring foil gage protection device, its characterized in that, includes coil spring (1), foil gage, protecting support (2), protection apron (3) and ribbon (4), the foil gage is fixed on coil spring (1), and the left and right sides of foil gage is fixed with protecting support (2) respectively, and protecting support (2) cover is on coil spring (1), and protection apron (3) are fixed on protecting support (2), and protecting support (2) and protection apron (3) are fixed on coil spring through ribbon (4).
2. The protection device for the coil spring strain gage as claimed in claim 1, wherein the protection bracket (2) is rectangular, a semicircular hole is formed on the right end face of the rectangle for being sleeved on the coil spring (1), and a bolt connecting hole (7) is formed on the left end face of the rectangle for being fixedly connected with the protection cover plate (3).
3. A protection device for a coil spring strain gage as claimed in claim 1, characterized in that the upper and lower end faces of the protective bracket (2) are each provided with a fixing groove (6) for passing the cable tie (4).
4. A protection device for a coil spring strain gage as claimed in claim 1, characterized in that the protective bracket (2) is fixedly connected to the protective cover plate (3) by means of a fixing bolt (5).
5. A protection device for a helical spring strain gage as claimed in claim 2 wherein said bolt attachment holes (7) are two in number.
6. A protection device for a coil spring strain gage as defined in claim 1, characterized in that the distance between the protective bracket (2) and the left and right sides of the strain gage is 5 mm.
7. A protection device for a coil spring strain gage as claimed in claim 1, wherein the material of the protective bracket (2) and the protective cover (3) is resin material.
8. A protection device for a coil spring strain gage as claimed in claim 1 wherein said protective cover plate (3) is recessed and has a plurality of bolt attachment holes on its end face for attachment to the protective bracket (2) through anchor bolts (5).
9. A coil spring strain gage protection device as claimed in claim 1 wherein said strain gage is affixed to the coil spring (1) at an intermediate location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020806515.1U CN212340161U (en) | 2020-05-15 | 2020-05-15 | Helical spring foil gage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020806515.1U CN212340161U (en) | 2020-05-15 | 2020-05-15 | Helical spring foil gage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212340161U true CN212340161U (en) | 2021-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020806515.1U Active CN212340161U (en) | 2020-05-15 | 2020-05-15 | Helical spring foil gage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212340161U (en) |
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2020
- 2020-05-15 CN CN202020806515.1U patent/CN212340161U/en active Active
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