CN209927077U - Full-bridge type resistance strain sensor - Google Patents

Abstract

The utility model discloses a full bridge type resistance strain sensor, which comprises a body, the lower surface rigid coupling of body has the bottom plate, the upper surface four corners of bottom plate is all opened flutedly, the inside of recess is equipped with fixing device, the front surface of body is equipped with auxiliary device, the right side rigid coupling of body has the drum, the wire has been inserted to the inside of drum. This full bridge type resistance strain sensor, through the square, the bolt, the boss, first sleeve, the second sleeve, the pointer, the cooperation between scale and the layer board, make full bridge type resistance strain sensor's detection effect comparatively accurate, through the bottom plate, the recess, the screw rod, the clamp plate, the cooperation between nut and the compression spring, can effectually prevent not hard up of screw rod in the full bridge type resistance strain sensor use, guaranteed full bridge type resistance strain sensor's stability, make the test result of body test obtain the guarantee.

Description

Full-bridge type resistance strain sensor

Technical Field

The utility model relates to a resistance strain sensor technical field specifically is a full bridge type resistance strain sensor.

Background

The full-bridge type resistance strain sensor belongs to one type of resistance strain weighing sensor and is based on the following principle: the elastic body (elastic element, sensitive beam) generates elastic deformation under the action of external force, so that the resistance strain gauge (conversion element) adhered to the surface of the elastic body also generates deformation along with the elastic deformation, after the resistance strain gauge is deformed, the resistance value of the resistance strain gauge is changed (increased or reduced), and then the resistance change is converted into an electric signal (voltage or current) through a corresponding measuring circuit, so that the process of converting the external force into the electric signal is completed, the existing full-bridge type resistance strain type sensor is easy to generate the condition that a pressing surface needing to test pressure is not parallel to the upper surface of a testing head at the top end of the full-bridge type resistance strain type sensor in the using and installing process, although the error is small, the existing full-bridge type resistance strain type sensor can influence the detection result to cause the inaccuracy of the detection result, and in the using process, a screw rod for fixing the full-bridge type resistance strain type sensor is easy to, the stability of the full-bridge resistance strain sensor is not strong, and the detection result is not accurate enough.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a full bridge type resistance strain transducer, in order to solve the in-process that proposes current full bridge type resistance strain transducer and use the installation among the above-mentioned background art, appear the condition that need the push down face of test pressure and the upper surface of the test head on full bridge type resistance strain transducer top nonparallel to appear easily, although the error is less, but be enough to exert an influence to the result of detection, lead to the not accurate of testing result, and in-process using, its fixed full bridge type resistance strain transducer's screw rod produces easily not hard up, the stability that leads to full bridge type resistance strain transducer is not strong, also can make the not accurate problem of result of detection enough.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a full bridge type resistance strain sensor, includes the body, the lower surface rigid coupling of body has the bottom plate, the upper surface four corners of bottom plate is all opened flutedly, the inside of recess is equipped with fixing device, the front surface of body is equipped with auxiliary device, the right side rigid coupling of body has the drum, the wire has been inserted to the inside of drum, the wire links to each other with the body electrical property, the outer wall of wire has cup jointed the toper cover, the toper cover links to each other with the drum screw thread.

Preferably, fixing device includes screw rod, clamp plate, nut, compression spring, gasket, circular slot and fixture block, the screw rod is located the inside of recess, the screw rod runs through the bottom plate, screw rod and bottom plate clearance fit, the top rigid coupling of screw rod has the clamp plate, the upper surface rigid coupling of clamp plate has the nut, compression spring has been cup jointed to the outer wall of screw rod, the equal rigid coupling in upper and lower both ends of compression spring has the gasket, gasket and screw rod clearance fit, the circular slot is seted up around the inside bottom of recess, the equal slip joint in the inside left and right sides of circular slot has the fixture block, the fixture block links to each other with the lower fixed surface of bottom gasket.

Preferably, the circular groove and the fixture block form a sliding structure.

Preferably, the central points of the nut, the pressing plate and the screw rod are all located on the same horizontal vertical line.

Preferably, the auxiliary device comprises a round block, a square block and scales, the round block is fixedly connected with the front side of the outer wall of the body, the square block is attached to the front surface of the round block, a bolt is inserted into the front surface of the square block, the bolt penetrates through the square block and is in threaded connection with the round block, the square block is in clearance fit with the bolt, a first sleeve is fixedly connected to the left surface of the square block, a sliding rod is inserted into the left side of the first sleeve and is in clearance fit with the first sleeve, a first disc is fixedly connected to the right side of the sliding rod, a supporting plate is fixedly connected to the left side of the sliding rod, first sliding grooves are formed in the upper end and the lower end of the inner wall of the first sleeve, a first sliding block is connected to the inner side of the first sliding groove in a sliding clamping mode, the first sliding block is fixedly connected with the first disc, a second sleeve is fixedly connected to the right surface of the square block, a pointer, the left side rigid coupling of pointer has the second disc, both ends have all been opened at the upper and lower both ends of the telescopic inner wall of second have the second spout, the inside sliding clamping of second spout has the second slider, the second slider links to each other with the second disc is fixed, the scale spraying is in the front surface bottom of bottom plate.

Preferably, the supporting plate and the center point of the pointer are located on the same horizontal line.

Compared with the prior art, the beneficial effects of the utility model are that: this full bridge type resistance strain sensor, in-process using, through the square, the bolt, the circle piece, first sleeve, the second sleeve, the pointer, cooperation between scale and the layer board, the last surface that can ensure the test head on the push down face that needs test pressure and full bridge type resistance strain sensor top parallels, make full bridge type resistance strain sensor's detection effect comparatively accurate, through the bottom plate, a groove, the screw rod, the clamp plate, cooperation between nut and the compression spring, compression spring's compression can increase the external screw thread of screw rod and the effort between the fixed plate internal thread, and then can effectually prevent not hard up of screw rod in the full bridge type resistance strain sensor use, full bridge type resistance strain sensor's stability has been ensured, make the test result of body test obtain the guarantee.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top partial cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a connection structure of the base plate, the groove and the screw of FIG. 1;

FIG. 4 is a schematic view of a connection structure of the body, the first sleeve and the second sleeve of FIG. 1;

FIG. 5 is a schematic view of the connection structure of the body, the round block and the square block of FIG. 2;

FIG. 6 is a schematic view showing a connection structure of the spacer, the circular groove and the latch of FIG. 3

In the figure: 1. the device comprises a body, 2, a bottom plate, 3, a groove, 4, a fixing device, 401, a screw rod, 402, a pressure plate, 403, a nut, 404, a compression spring, 405, a gasket, 406, a circular groove, 407, a clamping block, 5, an auxiliary device, 501, a circular block, 502, a square block, 503, a bolt, 504, a first sleeve, 505, a sliding rod, 506, a first disc, 507, a supporting plate, 508, a first sliding groove, 509, a first sliding block, 510, a second sleeve, 511, a pointer, 512, a second disc, 513, a second sliding groove, 514, a second sliding block, 515, a scale, 6, a cylinder, 7, a lead, 8 and a taper sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a full-bridge type resistance strain sensor comprises a body 1, wherein the body 1 is a sensor body, a bottom plate 2 is fixedly connected to the lower surface of the body 1, grooves 3 are formed in four corners of the upper surface of the bottom plate 2, the grooves 3 are round-hole grooves, a fixing device 4 is arranged inside each groove 3, an auxiliary device 5 is arranged on the front surface of the body 1, a cylinder 6 is fixedly connected to the right side of the body 1, a lead 7 is inserted into the cylinder 6, the lead 7 is in clearance fit with the cylinder 6, the lead 7 is electrically connected with the body 1, a conical sleeve 8 is sleeved on the outer wall of the lead 7, the left side of the inner wall of the conical sleeve 8 is in threaded connection with the outer wall of the cylinder 6, the right side of the inner wall of the conical sleeve 8 is tightly abutted against the outer wall of the lead 7, dust and moisture in air can be prevented from entering the inner portion of the conical sleeve 8, the fixing device 4 comprises a screw 401, a, the screw 401 is located inside the groove 3, the screw 401 penetrates through the bottom plate 2, the screw 401 is in clearance fit with the bottom plate 2, the top end of the screw 401 is fixedly connected with a pressing plate 402, the upper surface of the pressing plate 402 is fixedly connected with a nut 403, the nut 403 is an inner hexagon nut, the outer wall of the screw 401 is sleeved with a compression spring 404, the coefficient of the compression spring 404 is 10N/CM, the compression spring 404 can be compressed or stretched outside the screw 401, gaskets 405 are fixedly connected to the upper end and the lower end of the compression spring 404, the two gaskets 405 are also sleeved on the outer wall of the screw 401, the gasket 405 is in clearance fit with the screw 401, a circular groove 406 is formed around the inner bottom end of the groove 3, clamping blocks 407 are slidably clamped on the left side and the right side of the inner portion of the circular groove 406, the clamping blocks 407 are fixedly connected with the left side and the right side of the lower surface of the gasket 405 at the bottom end, the central points of the nut 403, the pressing plate 402 and the screw 401 are all located on the same horizontal vertical line, the screw 401 and the pressing plate 402 can concentrically rotate in the rotation process of the nut 403, the auxiliary device 5 comprises a round block 501, a square block 502 and scales 515, the round block 501 is fixedly connected with the front side of the outer wall of the body 1, the square block 502 is attached to the front surface of the round block 501, a bolt 503 is inserted into the front surface of the square block 502, the bolt 503 penetrates through the square block 502 to be in threaded connection with the round block 501, the square block 502 is in clearance fit with the bolt 503, the square block 502 can rotate by taking the bolt 503 as the center, the left surface of the square block 502 is fixedly connected with a first sleeve 504, a slide bar 505 is inserted into the left side of the first sleeve 504, the slide bar 505 is in clearance fit with the first sleeve 504, the right side of the slide bar 505 is fixedly connected with a first disc 506, the first disc 506 is in clearance fit with the sleeve, the upper end and the lower end of the inner wall of the first sleeve 504 are both provided with a first sliding groove 508, the inner part of the first sliding groove 508 is connected with a first sliding block 509 in a sliding and clamping way, the first sliding block 509 is fixedly connected with a first disk 506, the right surface of the square 502 is fixedly connected with a second sleeve 510, the right side of the second sleeve 510 is inserted with a pointer 511, the pointer 511 is in clearance fit with the second sleeve 510, the left side of the pointer 511 is fixedly connected with a second disk 512, the second disk 512 is in clearance fit with the second sleeve 510, the upper end and the lower end of the inner wall of the second sleeve 510 are both provided with a second sliding groove 513, the inner part of the second sliding groove 513 is connected with a second sliding block 514 in a sliding and clamping way, the second sliding block 514 is fixedly connected with the second disk 512, a scale 515 is sprayed on the bottom end of the front surface of the bottom, when the bottom end of the pointer 511 points to the center of the scale 515, it can be ensured that the upper surface of the support plate 507 and the upper surface of the base plate 2 are parallel to each other.

When the full-bridge resistance strain sensor is used, firstly, the block 502 is rotated by taking the bolt 503 as a center, the bottom end of the pointer 511 points to the center of the scale 515, then the supporting plate 507 is pulled upwards, the sliding rod 505 can slide in the first sleeve 504 by pulling the supporting plate 507 upwards, the upper surface of the supporting plate 507 is attached to the pressing surface needing the testing pressure, then the fixing plate capable of fixing the body 1 is attached to the lower surface of the bottom plate 2, attention needs to be paid to ensure that no gap exists between the supporting plate 507 and the pressing surface needing the testing pressure, and no gap needs to exist between the lower surface of the bottom plate 2 and the fixing plate, at this time, the pressing surface needing the testing pressure is ensured to be parallel to the upper surface of the testing head at the top end of the body 1, and the testing result cannot be influenced by the non-parallelism of the pressing surface needing the testing pressure and the upper surface of the testing head at the top end of the body 1, then the screw 401 runs through the bottom plate 2 from the inside of the compression spring 404, the screw 401 is connected with the fixed plate through threads, the pressing plate 402 is tightly abutted to the bottom plate 2, at the moment, the compression spring 404 can be compressed, the acting force between the external threads of the screw 401 and the internal threads of the fixed plate can be increased, further, the looseness of the screw 401 in the use process of the body 1 can be effectively prevented, the stability of the body 1 is guaranteed, the test result of the body test is guaranteed, namely, the body 1 is installed, the bolt 503 is rotated anticlockwise in the use process, the square block 502 is separated from the round block 501, all parts of the auxiliary device 5 (except the round block 501) are stored, then the rightmost side of the lead 7 is connected with an external power supply, and the full-bridge type resistance strain type sensor can be used.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A full-bridge type resistance strain gauge sensor, includes body (1), its characterized in that: the lower surface rigid coupling of body (1) has bottom plate (2), recess (3) have all been opened in the upper surface four corners of bottom plate (2), the inside of recess (3) is equipped with fixing device (4), the front surface of body (1) is equipped with auxiliary device (5), the right side rigid coupling of body (1) has drum (6), wire (7) have been inserted to the inside of drum (6), wire (7) link to each other with body (1) electrical property, the outer wall of wire (7) has cup jointed toper cover (8), toper cover (8) and drum (6) screw thread link to each other.

2. A full bridge resistive strain gauge sensor according to claim 1, wherein: the fixing device (4) comprises a screw (401), a pressing plate (402), a nut (403), a compression spring (404), a gasket (405), a circular groove (406) and a clamping block (407), the screw (401) is located inside the groove (3), the screw (401) penetrates through the bottom plate (2), the screw (401) is in clearance fit with the bottom plate (2), the pressing plate (402) is fixedly connected to the top end of the screw (401), the nut (403) is fixedly connected to the upper surface of the pressing plate (402), the compression spring (404) is sleeved on the outer wall of the screw (401), the gasket (405) is fixedly connected to the upper end and the lower end of the compression spring (404), the gasket (405) is in clearance fit with the screw (401), the circular groove (406) is formed around the bottom inside of the groove (3), the clamping block (407) is slidably clamped on the left side and the right side of the inside of the circular groove (406), the fixture block (407) is fixedly connected with the lower surface of the bottom end gasket (405).

3. A full bridge resistive strain gauge sensor according to claim 2, wherein: the circular groove (406) and the clamping block (407) form a sliding structure.

4. A full bridge resistive strain gauge sensor according to claim 2, wherein: the central points of the nut (403), the pressing plate (402) and the screw (401) are all located on the same horizontal vertical line.

5. A full bridge resistive strain gauge sensor according to claim 1, wherein: the auxiliary device (5) comprises a round block (501), a square block (502) and scales (515), wherein the round block (501) is fixedly connected with the front side of the outer wall of the body (1), the square block (502) is attached to the front surface of the round block (501), a bolt (503) is inserted into the front surface of the square block (502), the bolt (503) penetrates through the square block (502) and is in threaded connection with the round block (501), the square block (502) is in clearance fit with the bolt (503), a first sleeve (504) is fixedly connected to the left surface of the square block (502), a sliding rod (505) is inserted into the left side of the first sleeve (504), the sliding rod (505) is in clearance fit with the first sleeve (504), a first disc (506) is fixedly connected to the right side of the sliding rod (505), a supporting plate (507) is fixedly connected to the left side of the sliding rod (505), first sliding grooves (508) are formed in the upper end and the lower end of the inner wall of the first sleeve, the inside slip joint of first spout (508) has first slider (509), first slider (509) links to each other with first disc (506) is fixed, the right surface rigid coupling of square (502) has second sleeve (510), pointer (511) have been inserted on the right side of second sleeve (510), pointer (511) and second sleeve (510) clearance fit, the left side rigid coupling of pointer (511) has second disc (512), second spout (513) have all been opened at both ends about the inner wall of second sleeve (510), the inside slip joint of second spout (513) has second slider (514), second slider (514) and second disc (512) are fixed to be linked to each other, scale (515) spraying is in the front surface bottom of bottom plate (2).

6. A full bridge resistive strain gauge sensor according to claim 5, wherein: the supporting plate (507) and the center point of the pointer (511) are positioned on the same horizontal line.

Images