High-sensitivity column type tension and pressure sensor

Abstract

The utility model discloses a high sensitivity column type tension and pressure sensor, relates to the tension and pressure sensor technology field, and comprises a top plate, a detection stress body and a bottom plate, the middle position of the bottom surface of the top plate is provided with a threaded hole, and the edge position of the top plate is circumferentially provided with a plurality of groups of telescopic support assemblies at equal intervals; the top of the detection stress body is provided with a connecting thread and is in threaded connection with the threaded hole through the connecting thread, and the bottom of the detection stress body is connected with a force sensing assembly in a matched mode. The bottom plate is connected with the force sensing assembly in a matched mode, and the telescopic supporting assembly is arranged between the top plate and the bottom plate in a matched mode. The top plate increases the stress area of the detection stress body on pull pressure, so that the detection stress body can better adapt to the distribution of force, the telescopic supporting assembly can disperse the action of external force, the local stress of the sensor is reduced, key parts of the sensor are protected, and the service life of the sensor is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of tension and pressure sensors, and in particular relates to a high-sensitivity columnar tension and pressure sensor. Background Art

[0002] A tension and pressure sensor is a sensor that can measure the force exerted on an object during tension or compression. It can convert the pressure or tension exerted on the object into an electrical signal output. It is usually used in industrial automation control, mechanical equipment monitoring, medical equipment, automotive industry and other fields.

[0003] In the prior art, the columnar tension and pressure sensor has high sensitivity, and includes: a force sensing component, a strain gauge, a detection force-bearing body and a cable. When the top of the detection force-bearing body is subjected to pressure, the detection force-bearing body moves downward in the force sensing component due to the pressure, and the downward moving detection force-bearing body drives the elastic element to deform, and the deformation causes the resistance on the strain gauge to change. The electrical signal is transmitted to the signal processor through the cable to display the value.

[0004] However, most of the existing columnar tensile and pressure sensors are applied to equipment in an integrated column type. When the pressure center of gravity and the center line of the detected force-bearing body do not coincide, the tensile and pressure sensor will be subjected to uneven force, resulting in inaccurate signals or errors in the sensor output. In addition, the tensile and pressure sensors will be subjected to uneven stress during long-term use, which may damage the key components of the sensor and affect the normal operation of the sensor. Utility Model Content

[0005] The utility model aims to provide a high-sensitivity columnar tension and pressure sensor to solve the technical problem in the prior art that the columnar tension and pressure sensor is subjected to uneven force and its service life is affected.

[0006] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0007] A high-sensitivity columnar tension and pressure sensor, comprising: a top plate, a threaded hole is provided in the middle of the bottom surface of the top plate, and a plurality of groups of telescopic support components are equidistantly distributed around the edge of the top plate;

[0008] A detection force-bearing body, wherein a connecting thread is provided on the top of the detection force-bearing body and is threadedly connected to the threaded hole through the connecting thread, and a force sensing component is cooperatively connected to the bottom of the detection force-bearing body; and

[0009] The bottom plate is connected with the force sensing component, and the telescopic support component is arranged between the top plate and the bottom plate.

[0010] As a further solution of the utility model: each group of the telescopic support assembly includes a limit rod, a limit sleeve and a handle, one end of the limit rod is fixedly connected to the edge of the top plate, and the other end is cooperatively connected to the limit sleeve, the limit sleeve is fixedly connected with a clamping ring at one end away from the limit rod, and the side of the limit sleeve is fixedly connected with a handle, and the clamping ring cooperates with the bottom plate.

[0011] As a further solution of the utility model: an annular groove is opened at the top of the bottom plate around the center line of the top plate, the annular groove is engaged with the retaining ring, and a screw rod is threadedly connected to the side of the bottom plate, the bottom end of the screw rod passes through the annular groove and abuts against the retaining ring.

[0012] As a further solution of the utility model: the diameter of the top plate is larger than the diameter of the detection force-bearing body, and smaller than the diameter of the bottom plate.

[0013] As a further solution of the utility model: a slot is provided inside the limiting sleeve, grooves are longitudinally provided around the inner wall of the slot, convex strips corresponding to the grooves are provided on the outer side of the limiting rod, and the limiting rod is plugged into the slot.

[0014] As a further solution of the utility model: the side ends of the force sensing components are respectively fixedly connected with a plurality of limit blocks, the top of the base plate is provided with a plurality of limit grooves, the limit blocks are engaged in the corresponding limit grooves, and the upper end of the limit blocks is plugged with screw rod 2, and the bottom of the screw rod 2 is threadedly connected to the base plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model sets a top plate on the top of the detection force-bearing body, and the top plate increases the force-bearing area of ​​the detection force-bearing body to the tensile pressure, so that the detection force-bearing body can better adapt to the distribution of force. After the top plate is stressed, the force is transmitted to the telescopic support assembly. Since the telescopic support assembly has the function of supporting and connecting, the top plate and the bottom plate are slidably connected together, and multiple groups are distributed circumferentially, thereby avoiding the phenomenon that the edge of the top plate is not supported. After the telescopic support assembly is stressed, the limit rod slides inside the limit sleeve, which has a limiting effect, avoiding the detection force-bearing body from generating a tilting force on the force sensing assembly. The telescopic support assembly can disperse the effect of external force, reduce the local stress of the sensor, protect the key components of the sensor, and increase its service life.

[0017] 2. In the utility model, by providing a top plate and a bottom plate that can be quickly disassembled, when the sensor needs to be repaired, screw rod one and screw rod two are removed, and the handle is rotated until the threaded hole on the top plate is disengaged from the top of the detection force-bearing body, and then the handle is pulled upward to disengage the retaining ring from the ring groove, and the bottom plate is pulled downward to disengage the limit block from the limit groove, so that the sensor can be repaired. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the top plate and the detection force-bearing body being connected in cooperation with each other in the utility model;

[0020] Figure 3 for Figure 2 A schematic diagram of the structure at A;

[0021] Figure 4 This is a schematic diagram of the structure of the top plate and the clamping ring in the utility model;

[0022] Figure 5 for Figure 4 A schematic diagram of the structure at B;

[0023] Figure 6 This is a schematic diagram of the structure of the force sensing component and the limit block in the utility model;

[0024] Figure 7 It is a structural schematic diagram of the cooperative connection between the limit sleeve and the clamping ring in the utility model.

[0025] Illustration: 1. Top plate; 2. Screw one; 3. Limit rod; 4. Limit sleeve; 5. Handle; 6. Retaining ring; 7. Force sensing assembly; 8. Detection force body; 9. Threaded hole; 10. Limit block; 11. Bottom plate; 12. Limit groove; 13. Ring groove; 14. Slot; 15. Groove; 16. Raised strip; 17. Screw two. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] like Figures 1 to 7 As shown, a high-sensitivity columnar tension and pressure sensor comprises a top plate 1, a detection force-bearing body 8, and a bottom plate 11. A threaded hole 9 is provided in the middle of the bottom surface of the top plate 1. A plurality of groups of telescopic support components are equidistantly distributed around the edge of the top plate 1. The top plate 1 is used to bear the tension and pressure of the force-bearing end.

[0028] A connecting thread is provided on the top of the detection force-bearing body 8, and is threadedly connected to the threaded hole 9 through the connecting thread, and a force sensing component 7 is cooperatively connected to the bottom of the detection force-bearing body 8;

[0029] The top plate 1 is installed on the detection force-bearing body 8, and the threaded hole 9 opened at the bottom of the top plate 1 is threadedly connected to the top of the detection force-bearing body 8. After the top plate 1 is installed, the tension and pressure can be applied to the top plate 1. In order to ensure accurate measurement of the tension and pressure, when the top plate 1 is installed on the detection force-bearing body 8, the staff adjusts or records the value of the signal processor according to the weight of the top plate 1. When the tension and pressure move the detection force-bearing body 8, the detection force-bearing body 8 slides in the force sensing assembly 7. The force sensing assembly 7 is provided with relevant sensing elements or elastic electric elements. The detection force-bearing body 8 cooperates with the force sensing assembly 7 to convert the tension and pressure applied thereon into an electrical signal output;

[0030] The bottom plate 11 is connected with the force sensing assembly 7, and the telescopic support assembly is arranged between the top plate 1 and the bottom plate 11;

[0031] In order to avoid the instability of the center of gravity at the bottom of the force sensing assembly 7, the bottom plate 11 is installed on the force sensing assembly 7. The bottom plate 11 increases the area of ​​the bottom of the force sensing assembly 7 to avoid the stability of the sensor due to the small area of ​​the bottom of the force sensing assembly 7. The top plate 1 and the bottom plate 11 are connected by a telescopic support assembly to avoid the phenomenon that the edge of the top plate 1 is not supported.

[0032] In some specific embodiments, such as Figure 1 As shown, in order to facilitate the limiting effect on the edge of the top plate 1, each set of telescopic support components includes a limiting rod 3, a limiting sleeve 4 and a handle 5. One end of the limiting rod 3 is fixedly connected to the edge of the top plate 1, and the other end is slidably connected to the limiting sleeve 4. The limiting sleeve 4 is fixedly connected with a clamping ring 6 at one end away from the limiting rod 3, and the side of the limiting sleeve 4 is fixedly connected with a handle 5, and the clamping ring 6 cooperates with the bottom plate 11.

[0033] In some specific embodiments, such as Figure 3 As shown, in order to facilitate the installation of the telescopic support assembly, an annular groove 13 is circumferentially opened at the edge of the upper surface of the base plate 11, the annular groove 13 is engaged with the retaining ring 6, and a screw rod 2 is threadedly connected to the side of the base plate 11, and the end of the screw rod 2 passes through the annular groove 13 and cooperates with the retaining ring 6. Screwing the screw rod 2 can support the retaining ring 6.

[0034] In some specific embodiments, such as Figure 1 As shown, in order to enhance the stability of the top plate 1, the diameter of the top plate 1 is larger than the diameter of the detection force-bearing body 8 and smaller than the diameter of the bottom plate 11. The setting of the bottom plate 11 ensures that the edge of the top plate 1 is stably supported by the telescopic support assembly. The setting of the top plate 1 increases the force-bearing area of ​​the detection force-bearing body 8.

[0035] In some specific embodiments, such as Figure 6As shown, in order to further enhance the limiting effect on the top plate 1, a slot 14 is provided inside the limiting sleeve 4, a groove 15 is longitudinally provided on the inner wall of the slot 14, and a convex strip 16 corresponding to the groove 15 is provided on the outer side of the limiting rod 3. The slot 14 limits the limiting rod 3. Since the limiting rod 3 and the limiting sleeve 4 are both kept vertical, the limiting rod 3 will limit the edge of the top plate 1 in the slot 14;

[0036] When the top plate 1 moves under the action of force, the limit rod 3 moves downward in the limit sleeve 4. When the force does not coincide with the center line of the top plate 1, the limit rod 3 and the limit sleeve 4 limit the edge of the top plate 1. The limiting action blocks the tendency of the edge of the top plate 1 to overturn, thereby keeping the force of the force-bearing body 8 on the force sensing component 7 vertical, avoiding damage to the internal components of the sensor due to the tilt caused by the force.

[0037] In some specific embodiments, such as Figure 4 As shown, in order to enhance the stability of the force sensing assembly 7, a plurality of limit blocks 10 are circumferentially fixedly connected to one end of the force sensing assembly 7 away from the top plate 1, and a plurality of limit grooves 12 are provided on the upper surface of the bottom plate 11. The limit blocks 10 are engaged in the corresponding limit grooves 12, and a second screw 17 is provided between the limit blocks 10 and the corresponding limit grooves 12. The specific connection is that the second screw 17 is inserted into the upper end of the limit block 10, and the bottom of the second screw 17 is threadedly connected to the bottom plate 11. The limit block 10 at the side end of the force sensing assembly 7 is engaged with the limit groove 12 at the top end of the bottom plate 11, thereby increasing the support area of ​​the bottom end of the force sensing assembly 7, thereby ensuring the stability of the bottom of the force sensing assembly 7 and avoiding the phenomenon of self-rotation of the force sensing assembly 7 on the bottom plate 11. The second screw 17 is provided to avoid the pulling force that will cause the limit block 10 to disengage from the limit groove 12.

[0038] In order for those skilled in the art to better understand the working principle of the embodiments of the present invention, the following is an explanation in conjunction with specific application scenarios:

[0039] During actual work, first install the top plate 1 on the detection force-bearing body 8, control the handle 5 to pull the limit sleeve 4 upward, the limit rod 3 is inserted into the limit sleeve 4, control the handle 5 to rotate the top plate 1, and the threaded hole 9 on the top plate 1 is threadedly connected to the detection force-bearing body 8, and then install the bottom plate 11 at the bottom of the force sensing assembly 7, the limit block 10 at the side end of the force sensing assembly 7 is engaged with the limit groove 12 at the top of the bottom plate 11, and screw the screw 17 to fix the force sensing assembly 7 and the bottom plate 11, and then control the handle 5 to pull the limit sleeve 4 downward, and the retaining ring 6 at the bottom end of the limit sleeve 4 is inserted into the annular groove 13, and the retaining ring 6 is fixed when the screw 1 is screwed. The top plate 1, the telescopic support assembly and the bottom plate 11 are installed, and the staff adjusts or records the value of the signal processor according to the weight of the top plate 1, and applies the pulling pressure to On the top plate 1, the top plate 1 pushes against the limit rod 3 to slide in the limit sleeve 4. At the same time, the top plate 1 pushes against the detection force-bearing body 8 to move in the force sensing assembly 7. The detection force-bearing body 8 drives the elastic element to deform, thereby generating an electrical signal to be transmitted to the signal processor to display the value, thereby achieving the effect of measuring the tension and pressure. The top plate 1 increases the force-bearing area of ​​the detection force-bearing body 8, so that the detection force-bearing body 8 can better adapt to the distribution of force. The telescopic support assembly has the function of supporting and connecting. The telescopic support assembly slidably connects the top plate 1 and the bottom plate 11 together, and has a limiting function. By dispersing the effect of external force, the local stress of the sensor is reduced, so that the force of the detection force-bearing body 8 on the force sensing assembly 7 remains vertical, avoiding the detection force-bearing body 8 from being tilted due to force, which will damage the internal components of the sensor.

[0040] Among them, the bottom plate 11 increases the support area at the bottom of the force sensing component 7, avoiding the phenomenon that the force sensing component 7 is unevenly stressed due to the small bottom area of ​​the force sensing component 7. The limit sleeve 4 is connected to the bottom plate 11 through the clamping ring 6, so that the telescopic support component realizes that the limit support provided by the bottom plate 11 is transmitted to the top plate 1. When the top plate 1 is subjected to tensile pressure, the limit rod 3 slides in the limit sleeve 4. When the tensile pressure force direction does not coincide with the center line of the top plate 1, the slot 14 limits the limit rod 3. The sleeves 4 are kept vertical, so the limit rod 3 will limit the edge of the top plate 1 in the slot 14. The limit rod 3 and the limit sleeve 4 limit the edge of the top plate 1. The limiting effect blocks the tendency of the edge of the top plate 1 to overturn, thereby further enhancing the stability of the top plate 1. The limit block 10 and the limit groove 12 are limitedly connected, and the limiting effect provided by the bottom plate 11 is transmitted to the force sensing component 7 through the limit block 10, thereby ensuring the stability of the bottom of the force sensing component 7 and avoiding the phenomenon of self-rotation of the force sensing component 7 on the bottom plate 11.

[0041] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A high-sensitivity columnar tension and pressure sensor, characterized in that: include: A top plate (1), wherein a threaded hole (9) is provided in the middle of the bottom surface of the top plate (1), and a plurality of groups of telescopic support components are equidistantly distributed around the edge of the top plate (1); A force-bearing body (8) is detected, wherein a connecting thread is provided on the top of the force-bearing body (8), and is threadedly connected to the threaded hole (9) through the connecting thread, and a force sensing component (7) is cooperatively connected to the bottom of the force-bearing body (8); A bottom plate (11), the bottom plate (11) is cooperatively connected with the force sensing assembly (7), and the telescopic support assembly is cooperatively arranged between the top plate (1) and the bottom plate (11).

2. A high-sensitivity columnar tension and pressure sensor according to claim 1, characterized in that: Each group of the telescopic support components comprises a limit rod (3), a limit sleeve (4) and a handle (5); one end of the limit rod (3) is fixedly connected to the edge of the top plate (1), and the other end is slidably connected to the limit sleeve (4); the limit sleeve (4) is fixedly connected to one end away from the limit rod (3) with a clamping ring (6), and the side of the limit sleeve (4) is fixedly connected with the handle (5); the clamping ring (6) cooperates with the bottom plate (11).

3. A high-sensitivity columnar tension and pressure sensor according to claim 2, characterized in that: An annular groove (13) is circumferentially formed at the edge of the upper surface of the base plate (11), the annular groove (13) being engaged with the snap ring (6), and a screw rod (2) is threadedly connected to the side surface of the base plate (11), the end of the screw rod (2) passing through the annular groove (13) and being engaged with the snap ring (6).

4. A high-sensitivity columnar tension and pressure sensor according to claim 1, characterized in that: The diameter of the top plate (1) is larger than the diameter of the detection force-bearing body (8) and smaller than the diameter of the bottom plate (11).

5. A high-sensitivity columnar tension and pressure sensor according to claim 2, characterized in that: The limiting sleeve (4) is provided with a slot (14) inside, the inner wall of the slot (14) is provided with a groove (15) in the longitudinal direction, the outer side of the limiting rod (3) is provided with a convex strip (16) corresponding to the groove (15), and the limiting rod (3) is plugged into the slot (14).

6. A high-sensitivity column type tension and pressure sensor according to claim 1, characterized in that: The force sensing component (7) is circumferentially fixedly connected to one end away from the top plate (1) with a plurality of limit blocks (10); the upper surface of the bottom plate (11) is provided with a plurality of limit grooves (12); the limit blocks (10) are engaged in the corresponding limit grooves (12); and a second screw (17) is provided between the limit blocks (10) and the limit grooves (12).

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