CN214747851U - Displacement measuring device - Google Patents
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- CN214747851U CN214747851U CN202120876734.1U CN202120876734U CN214747851U CN 214747851 U CN214747851 U CN 214747851U CN 202120876734 U CN202120876734 U CN 202120876734U CN 214747851 U CN214747851 U CN 214747851U
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- elastic beam
- displacement
- thimble
- measuring device
- displacement meter
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Abstract
The utility model provides a displacement measurement device belongs to engineering detection technology field, including support frame, elastic beam, thimble and displacement meter, on the support frame was located to the one end of elastic beam, the other end extended along the direction that deviates from the support frame, and the thimble sets firmly in the other end of elastic beam, the vertical setting of thimble, and on the support frame was located to the displacement meter, with elastic beam homonymy setting, the displacement was located the below of elastic beam, and was located between thimble and the support frame, and the measuring stick of displacement meter was connected with the lower terminal surface of elastic beam. The utility model provides a displacement measurement device, through this kind of structure, can measure the displacement that is greater than displacement meter range itself with the help of the amount of deflection deformation relation and the displacement meter of elastic beam, increased the test range to the thimble volume is less can stretch into and measure in the narrow and small space.
Description
Technical Field
The utility model belongs to the technical field of the engineering detects, more specifically says, relates to a displacement measurement device.
Background
As a device for measuring displacement, a displacement meter has been widely used in various engineering fields. The conventional displacement meter is a thimble type displacement meter and has the advantages of low price, high accuracy, mature technology, convenience in operation and the like. But the measuring range of the displacement of the thimble is fixed, and the thimble cannot be used when the measured displacement is larger than the measuring range; and the thimble displacement meter measures the displacement direction and is the same direction with self size, need consider thimble displacement meter installation space when using, can't measure narrow and small space displacement, like the slot.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a displacement measurement device to solve the unable increase of the range that the thimble displacement meter that exists among the prior art surveyed, and the unable technical problem who measures narrow and small space displacement.
In order to achieve the above object, the utility model adopts the following technical scheme: provided is a displacement measuring device including:
a support frame;
one end of the elastic beam is arranged on the support frame, and the other end of the elastic beam extends along the direction departing from the support frame;
the thimble is fixedly arranged at the other end of the elastic beam; the thimble is vertically arranged;
the displacement meter is arranged on the support frame and is arranged on the same side as the elastic beam; the displacement meter is positioned below the elastic beam and between the thimble and the support frame; and a measuring rod of the displacement meter is connected with the lower end face of the elastic beam.
In one possible implementation, the support frame includes:
a base;
the vertical rod is fixedly arranged on the base; the vertical rod is provided with a plurality of screw holes arranged from top to bottom;
the two sliding blocks are connected to the vertical rod in a sliding mode; the sliding block is provided with a connecting hole and is detachably connected with the vertical rod through a screw; one end of the elastic beam is arranged between the two sliding blocks.
In one possible implementation, the support frame further includes:
one end of the transverse rod is fixed on the vertical rod; the transverse rod is positioned below the elastic beam; the displacement meter is mounted on the transverse rod.
In a possible implementation manner, the transverse rod is provided with a long hole arranged along the length direction and a plurality of first through holes penetrating through the long hole; the displacement meter is provided with a second through hole corresponding to the first through hole, and is connected with the strip hole in a sliding manner and connected with the transverse rod through a bolt.
In a possible implementation manner, the sliding block is a cylindrical structure and is sleeved on the vertical rod; one ends of the two sliding blocks opposite to each other are provided with limiting flanges extending outwards; one end of the elastic beam is provided with a mounting hole which is sleeved on the vertical rod.
In a possible implementation manner, a reinforcing rib plate is arranged between the sliding block and the limiting flange.
In one possible implementation, the vertical rod is a hollow tube.
In a possible implementation manner, the upper end of the thimble is provided with a magnetic connecting piece for connecting with a measured object.
In one possible implementation, the magnetic coupling is a ball structure.
The utility model provides a displacement measurement device's beneficial effect lies in: compared with the prior art, the displacement measuring device of the utility model has the advantages that the measured object is contacted with the thimble when in use, and the elastic beam is pressed to be bent and deformed, so that the displacement meter connected with the elastic beam is stressed and measures the displacement, because the displacement generated at the end part of the elastic beam is larger than the displacement generated at the displacement meter, and the displacement of the measured object contacted with the thimble can be calculated according to the deflection relation of the elastic beam at each part and the displacement value of the displacement meter; through the structure, the displacement which is larger than the measuring range of the displacement meter can be measured by means of the deflection deformation relation of the elastic beam and the displacement meter, the measuring range is increased, and the thimble is small in size and can stretch into a narrow space to be measured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a displacement measuring device according to an embodiment of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is a schematic structural view of a thimble according to an embodiment of the present invention;
fig. 4 is a schematic view of the stress and size of the elastic beam provided by the embodiment of the present invention;
fig. 5 is a schematic diagram of an error caused by deflection of the thimble according to the embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a support frame; 11. a base; 12. a vertical rod; 13. a slider; 131. connecting holes; 132. a limiting flange; 133. reinforcing rib plates; 14. a transverse bar; 141. a strip hole; 142. a first through hole; 2. an elastic beam; 3. a thimble; 31. a magnetic force connector; 4. a displacement meter.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 3, a displacement measuring device according to the present invention will now be described. A displacement measuring device comprises a support frame 1, an elastic beam 2, a thimble 3 and a displacement meter 4, wherein one end of the elastic beam 2 is arranged on the support frame 1, and the other end extends along the direction departing from the support frame 1; the thimble 3 is fixedly arranged at the other end of the elastic beam 2; the thimble 3 is vertically arranged; the displacement meter 4 is arranged on the support frame 1 and is arranged on the same side as the elastic beam 2; the displacement is positioned below the elastic beam 2 and between the thimble 3 and the support frame 1; the measuring rod of the displacement meter 4 is connected with the lower end surface of the elastic beam 2.
Compared with the prior art, the displacement measuring device provided by the utility model has the advantages that the measured object is in contact with the thimble 3 during use, the elastic beam 2 is pressed to be bent and deformed, and the displacement meter 4 connected with the elastic beam 2 is stressed and measures displacement, and the displacement of the measured object in contact with the thimble 3 can be calculated according to the deflection relation of each part of the elastic beam 2 and the displacement value of the displacement meter 4 as the displacement generated at the end part of the elastic beam 2 is greater than that of the displacement meter 4; through the structure, the displacement which is larger than the measuring range of the displacement meter 4 can be measured by means of the deflection deformation relation of the elastic beam 2 and the displacement meter 4, the measuring range is increased, and the thimble 3 is small in size and can extend into a narrow space to be measured.
As shown in fig. 4, the present example will be described only with respect to downward deformation since the beam upward and downward deformation calculation methods are the same based on the principle that the constant cross section elastic beam 2 generates deflection when receiving a vertical force. The displacement meter 4 adopts a thimble displacement meter 4, wherein L is the distance between the thimble 3 and the fulcrum of the elastic beam 2, a is the distance between the displacement meter 4 and the fulcrum of the elastic beam 2, f is the vertical downward force at the thimble 3, w is the downward deflection generated by the elastic beam 2 at the thimble 3 under the action of f, and w is the downward deflection generated by the thimble 3 under the action of fBAnd (3) the elastic beam 2 at the thimble displacement meter 4 deflects downwards under the action of the f.
Due to the downward deflection w and w generated under the action of fBMuch smaller than the corresponding span, i.e. L>>wB、a>>w, thus yielding downward deflections w and w under the force fBComprises the following steps:
by combining the above two formulas, obtain
Wherein wBWhen "-", it means downward displacement; and a "+" indicates an upward shift.
Because the thimble displacement meter 4 is separated from the elastic beam 2, the thimble displacement meter 4 moves vertically downwards when the thimble displacement meter is acted by a downward force f; the thimble 3 is connected to the elastic beam 2, and when a downward force f is applied, a deflection angle is generated at the thimble 3, as shown in fig. 5 below.
When the length h of the thimble 3 is known, the relation between the actual displacement of the measured object, the measured displacement of the elastic beam 2 and the deflection angle of the thimble 3 can be obtained:
d1＝wB+ h (1-cos θ) (formula 2)
When the elastic beam 2 is displaced downwards, the difference value generated by the rotation angle of the thimble 3 is h (1-cos theta), theta is the rotation angle of the thimble 3 of the elastic beam 2 and is equal to the deflection angle of the thimble 3:
the relation between the measured distance w of the thimble displacement meter 4 and the actual displacement d1 of the measured object is obtained by integrating the formula 1, the formula 2 and the formula 3:
when the thimble 3 is displaced downwards, the relation between the actual displacement of the measured object and the measuring distance of the thimble displacement meter 4 is as the above formula, and when the parameters of the elastic beam 2 and the height of the thimble 3 are known, the moving distance w of the thimble displacement meter 4 is measured, so that the actual displacement d1 of the measured object can be obtained.
The utility model discloses the range is decided by 2 sizes of elastic beam and material, and when elastic beam 2 received down power f and acted on, the maximum stress appeared in the fixed point position, used yield limit to judge, should satisfy:
where σ f is the stress of the fixed pivot under the action of force f, MfMoment, W bending interface coefficient, b width of the beam 2, c thickness of the beam 2, σsIs the yield limit of the material, ksAnd (5) safety factor.
According to the above equation 5:
the material and the size of the elastic beam 2 are selected to design the measuring range of the displacement meter 4, so that the maximum downward deflection generated by the thimble 3 of the elastic beam 2 under the action of f is obtained, and the actual measuring range of the displacement meter 4 is obtained.
Examples of the invention
The following two embodiments illustrate the range extending device for the thimble displacement meter 4, and parameters can be changed according to specific requirements.
Example 1: the distance from the thimble 3 to the fixed pivot of the elastic beam 2 is as follows: l is 500 mm; the distance from the thimble displacement meter 4 to the fixed pivot of the elastic beam 2 is as follows: a is 200 mm; length of the thimble 3: h is 30 mm; thickness of the elastic beam 2: c is 2 mm. The elastic beam 2 is made of low-carbon steel, and the elastic modulus is as follows: e ═ 200 Gpa; yield limit: sigmas345 Mpa; and (4) safety factor: k is a radical ofs＝1.1。
Maximum range d1 of elastic beam 2 according to above formulas 2, 3 and 6max132.96 mm; according to the above formula 1, the thimble displacement meter 4 reads at the maximum measuring range of the elastic beam 2, and w is 27.182 mm. The actual measuring range of the device of the embodiment is 0-130.682 mm.
The corresponding relationship between the reading w of the thimble displacement meter 4 and the measured actual displacement d1 in the present embodiment is shown in the following table 1.
TABLE 1 Displacement measurement parameters (examples)
| Thimble Displacement Meter reading w (mm) | Actual displacement d1(mm) |
| 0 | 0 |
| 5 | 24.12 |
| 10 | 48.39 |
| 15 | 72.81 |
| 20 | 97.39 |
| 25 | 122.12 |
| 27.182 | 132.96 |
Example 2: the distance from the thimble 3 to the fixed pivot of the elastic beam 2 is as follows: l is 500 mm; the distance from the thimble displacement meter 4 to the fixed pivot of the elastic beam 2 is as follows: a is 300 mm; length of the thimble 3: h is 30 mm; thickness of the elastic beam 2: c is 2 mm. The elastic beam 2 is made of stainless steel, and the elastic modulus is as follows: e193 Gpa; yield limit: sigmas310 Mpa; and (4) safety factor: k is a radical ofs＝1.1。
Maximum range d1 of elastic beam 2 according to above formulas 2, 3 and 6max123.66 mm; according to the above formula 1, the thimble displacement meter 4 reads at the maximum measuring range of the elastic beam 2, and w is 52.567 mm. The actual measuring range of the device of the embodiment is 0-130.682 mm.
The corresponding relationship between the reading w of the thimble displacement meter 4 and the measured actual displacement d1 is shown in the following table 2.
TABLE 2 Displacement measurement parameters (examples)
| Thimble Displacement Meter reading w (mm) | Actual displacement d1(mm) |
| 0 | 0 |
| 10 | 23.22 |
| 20 | 46.59 |
| 30 | 70.09 |
| 40 | 93.74 |
| 50 | 117.53 |
| 52.567 | 123.66 |
Referring to fig. 1 and 2, as a specific embodiment of the displacement measuring device of the present invention, the supporting frame 1 includes a base 11, a vertical rod 12 and a sliding block 13, wherein the vertical rod 12 is fixed on the base 11; the vertical rod 12 is provided with a plurality of screw holes arranged from top to bottom; the number of the sliding blocks 13 is two, and the two sliding blocks are connected to the vertical rod 12 in a sliding mode; the sliding block 13 is provided with a connecting hole 131, and the sliding block 13 is detachably connected with the vertical rod 12 through a screw; one end of the elastic beam 2 is arranged between the two sliding blocks 13, the base 11 is used for being installed on a working table or the ground, the lower end of the vertical rod 12 is fixed on the base 11 through welding, and the two sliding blocks 13 are arranged to slide on the vertical rod 12 to adjust the heights of the two sliding blocks 13 so as to adapt to different working environments; after the position is adjusted, one end of the elastic beam 2 is installed between the two sliding blocks 13, the elastic beam 2 is clamped and fixed by the two sliding blocks 13, and the two sliding blocks 13 are fixed on the vertical rod 12 by screws penetrating through the connecting holes 131 and the screw holes.
Referring to fig. 1 and 2, as a specific embodiment of the displacement measuring device of the present invention, the supporting frame 1 further includes a transverse rod 14, and one end of the transverse rod 14 is fixed to the vertical rod 12; the transverse bar 14 is located below the elastic beam 2; displacement meter 4 installs on horizontal pole 14, and horizontal pole 14 is located the below of elastic beam 2 to one end is fixed on vertical pole 12, sets up displacement meter 4 on vertical pole 12, and displacement meter 4's measuring stick is connected with the lower extreme of elastic beam 2, installs displacement meter 4 steadily through setting up horizontal pole 14.
Referring to fig. 1 and 2, as a specific embodiment of the displacement measuring device of the present invention, the transverse rod 14 is provided with a long hole 141 arranged along the length direction and a plurality of first through holes 142 penetrating through the long hole 141; the displacement meter 4 is provided with a second through hole corresponding to the first through hole 142, the displacement meter 4 is slidably connected in the elongated hole 141 and is connected to the transverse rod 14 through a bolt, the displacement meter 4 is installed in the elongated hole 141, so that the displacement meter 4 can move along the length direction of the elongated hole 141, and the installation position of the displacement meter 4 is changed, when the displacement meter 4 is arranged close to the thimble 3, the increased measuring range of the displacement measuring device is smaller, and when the displacement meter 4 is far away from the thimble 3 and is close to one end of the elastic beam 2, the increased measuring range of the displacement measuring device is larger; after the position of the displacement meter 4 is adjusted, the displacement meter 4 is fixed in the transverse rod 14 by using bolts which pass through the second through hole and the first through hole 142.
Referring to fig. 1 and 2, as a specific embodiment of the displacement measuring device of the present invention, the sliding block 13 is a tubular structure and is sleeved on the vertical rod 12; the opposite ends of the two sliding blocks 13 are provided with limiting flanges 132 extending outwards; one end of the elastic beam 2 is provided with a mounting hole sleeved on the vertical rod 12, the sliding blocks 13 are arranged in a cylindrical structure and are sleeved on the vertical rod 12 in a sliding manner, and two corresponding ends of the two vertically arranged sliding blocks 13 are respectively provided with an annular limiting flange 132; when the elastic beam is installed, one sliding block 13 is sleeved on the vertical rod 12, then the installation hole in one end of the elastic beam 2 is sleeved on the vertical rod 12, and finally the other sliding block 13 is installed; two sliders 13 are respectively located on the upper side and the lower side of the elastic beam 2, the elastic beam 2 is clamped tightly by the two sliders 13, the contact area between the sliders 13 and the elastic beam 2 is increased by means of the annular limiting flange 132, and after the two sliders 13 are fixed on the vertical rod 12, the elastic beam 2 can be fixedly connected to the vertical rod 12.
Referring to fig. 1 and 2, as a specific embodiment of the displacement measuring device provided by the present invention, a rib plate 133 is disposed between the slider 13 and the limit flange 132, that is, the outer side surface of the slider 13 and the upper end surface of the limit flange 132 are respectively fixedly connected to the side surface and the lower end surface of the rib plate 133, so that the connection strength between the slider 13 and the limit flange 132 and the support strength thereof are improved by the rib plate, and the stable operation of the slider 13 and the limit flange 132 is ensured.
Please refer to fig. 1 and fig. 2, as a specific embodiment of the displacement measuring device provided by the present invention, the vertical rod 12 is a hollow tube, the weight of the vertical rod 12 made of the hollow tube is light, which is convenient for the transportation and installation of the working personnel, and the operation is convenient and reliable. The hollow pipe is square steel pipe, and slider 13 is the rectangle sleeve, therefore slider 13 can slide on square steel pipe steadily and smoothly, can prevent slider 13 arbitrary rotation again, ensures the accuracy of elastic beam 2 position.
Please refer to fig. 1 and fig. 3, as the utility model provides a displacement measuring device's a specific implementation, the upper end of thimble 3 is equipped with the magnetic connecting piece 31 that is used for being connected with the measured object, sets up magnetic connecting piece 31 in the upper end of thimble 3, when making the measured object be the metal material, can make thimble 3 and measured object closely link together through magnetic connecting piece 31 to can carry out two-way displacement measurement to the measured object with the help of magnetic connecting piece 31, improved this kind of displacement measuring device's application range. The magnetic connector 31 is made of strong magnetic material, so that the thimble 3 is reliably and stably connected with the object to be tested.
Please refer to fig. 1 and fig. 3, as the utility model provides a displacement measuring device's a specific implementation, magnetic connecting piece 31 is the ball structure, and magnetic connecting piece 31 is for rotating the ball structure that sets up in thimble 3 upper end, and the ball can roll freely, rotate under the exogenic action, and after the measured object contacts with the ball on the thimble 3, under ball self rolling, thimble 3 smoothly moves on the measured object surface, has also reduced frictional force, prevents that the measured object from receiving the damage.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A displacement measuring device, comprising:
a support frame;
one end of the elastic beam is arranged on the support frame, and the other end of the elastic beam extends along the direction departing from the support frame;
the thimble is fixedly arranged at the other end of the elastic beam; the thimble is vertically arranged;
the displacement meter is arranged on the support frame and is arranged on the same side as the elastic beam; the displacement meter is positioned below the elastic beam and between the thimble and the support frame; and a measuring rod of the displacement meter is connected with the lower end face of the elastic beam.
2. The displacement measuring device of claim 1, wherein the support bracket comprises:
a base;
the vertical rod is fixedly arranged on the base; the vertical rod is provided with a plurality of screw holes arranged from top to bottom;
the two sliding blocks are connected to the vertical rod in a sliding mode; the sliding block is provided with a connecting hole and is detachably connected with the vertical rod through a screw; one end of the elastic beam is arranged between the two sliding blocks.
3. The displacement measuring device of claim 2, wherein the support bracket further comprises:
one end of the transverse rod is fixed on the vertical rod; the transverse rod is positioned below the elastic beam; the displacement meter is mounted on the transverse rod.
4. The displacement measuring device according to claim 3, wherein the lateral rod is provided with an elongated hole arranged in a length direction and a plurality of first through holes penetrating the elongated hole; the displacement meter is provided with a second through hole corresponding to the first through hole, and is connected with the strip hole in a sliding manner and connected with the transverse rod through a bolt.
5. The displacement measuring device of claim 2, wherein the slider is a cylindrical structure and is sleeved on the vertical rod; one ends of the two sliding blocks opposite to each other are provided with limiting flanges extending outwards; one end of the elastic beam is provided with a mounting hole which is sleeved on the vertical rod.
6. The displacement measuring device of claim 5, wherein a stiffener is disposed between the slide and the stop flange.
7. The displacement measuring device of claim 2, wherein the vertical rod is a hollow tube.
8. The displacement measuring device of claim 1, wherein the top end of the thimble is provided with a magnetic connector for connecting with a measured object.
9. The displacement measuring device of claim 8, wherein the magnetic coupling is a ball bearing arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120876734.1U CN214747851U (en) | 2021-04-26 | 2021-04-26 | Displacement measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120876734.1U CN214747851U (en) | 2021-04-26 | 2021-04-26 | Displacement measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214747851U true CN214747851U (en) | 2021-11-16 |
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ID=78613826
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120876734.1U Active CN214747851U (en) | 2021-04-26 | 2021-04-26 | Displacement measuring device |
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| Country | Link |
|---|---|
| CN (1) | CN214747851U (en) |
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2021
- 2021-04-26 CN CN202120876734.1U patent/CN214747851U/en active Active
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