Double flat beam tension pressure sensor for easy replacement of parts

Abstract

The present invention discloses a double-flat beam tension and pressure sensor that is convenient for replacing parts, comprising: a base, a groove is arranged on the outer side of the lower part of the base; a connecting bolt connected to the bottom of the base, and an anti-skid coating is arranged on the outer side of the connecting bolt; a strain gauge installed in the middle of the inner side of the base, a wheel hub is arranged on the upper side of the strain gauge, and spokes are arranged on the outer side of the wheel hub; a slot is arranged at the inner upper end of the base, and a threaded hole is opened at the bottom of the slot; a pressure plate is arranged in the middle of the slot, and a fixing bolt is connected to the outer side of the pressure plate. The double-flat beam tension and pressure sensor that is convenient for replacing parts is provided with a connecting bolt, and combined with the setting of the groove, it is convenient to clamp the clamp or wrench, thereby facilitating the installation and disassembly of the sensor, and the setting of the anti-skid coating increases the friction of the outer surface of the connecting bolt, thereby improving the stability of the sensor after installation.

Description

Technical Field

[0001] The invention relates to the technical field of tension and pressure sensors, in particular to a double-flat beam tension and pressure sensor which is convenient for replacing parts. Background Art

[0002] Tension pressure sensor, also known as resistance strain sensor, belongs to the weighing sensor series. It is a device that converts physical signals into measurable electrical signal output. It is widely used in industrial weighing systems, platform scales, electronic scales, hook scales, batching scales and other force measurement occasions. The tension pressure sensor uses elastic body as the medium. The force acts on the resistors on both sides of the sensor to change its resistance, which is then converted into electrical signals through the corresponding circuit to achieve the following control.

[0003] The tension and pressure sensors on the market are not easy to install and disassemble, have poor stability after installation, and are not easy to disassemble as a whole, and are not easy to replace internal parts. For this reason, we propose a double-flat beam tension and pressure sensor that is easy to replace parts. Summary of the invention

[0004] The object of the present invention is to provide a double-flat beam tension and pressure sensor with easy parts replacement, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a double flat beam tension pressure sensor that is easy to replace parts, comprising:

[0006] A base, wherein a groove is arranged on the outer side of the lower part of the base;

[0007] A connecting bolt connected to the bottom of the base, wherein an outer side of the connecting bolt is provided with an anti-slip coating;

[0008] A strain gauge is installed in the middle of the inner side of the base, a wheel hub is arranged on the upper side of the strain gauge, and spokes are arranged on the outer side of the wheel hub;

[0009] A card slot, which is arranged at the inner upper end of the base, and a threaded hole is opened at the bottom of the card slot;

[0010] A pressure plate is arranged in the middle of the slot, and a fixing bolt is connected to the outer side of the pressure plate.

[0011] Preferably, the connecting bolt and the base are threadedly connected, and the anti-slip coating and the connecting bolt are tightly fitted.

[0012] Preferably, the fixing bolt and the pressing plate are movably connected, and the pressing plate forms a snap-fit ​​structure with the base through a snap groove.

[0013] Preferably, the spokes and the hub are an integrated structure, and the hub and the base are movably connected.

[0014] Preferably, the base further comprises:

[0015] a wiring harness sheath connected to a lower right portion of the base;

[0016] The wire is arranged inside the wire harness sheath, and the end of the wire is connected with an extension wire through a wiring terminal.

[0017] Preferably, the wiring harness sheath is movably connected to the base, and the wiring harness sheath is in an "L"-shaped structure.

[0018] Preferably, the wheel hub is further provided with:

[0019] A threaded rod is connected to the middle part of the wheel hub, a pull ring is arranged at the upper end of the threaded rod, and a fastening nut is arranged at the middle part of the threaded rod.

[0020] Preferably, the pull ring and the threaded rod are an integrated structure, and the threaded rod is threadedly connected to the wheel hub and the fastening nut.

[0021] Preferably, a displacement component is provided on the outside of the base, and the displacement component includes a semi-ring seat arranged on the outside of the base, and the semi-ring seat is staggered with the groove. The semi-ring seat includes a lower ring body and an upper ring body arranged on the upper end thereof, and a sliding groove is provided on the upper end surface of the lower ring body, and a sliding block is slidably matched in the sliding groove, and an installation cavity is provided in the sliding block, and a winding roller is provided in the installation cavity. The end of the winding roller is rotatably connected to the inner wall of the installation cavity through a fixed shaft, and a torsion spring is provided between the fixed shaft and the inner wall of the installation cavity, and the winding of the data line is realized by the rotation of the torsion spring. A connecting piece for connecting the wiring harness sheath is provided on the outside of the sliding block, and a data line is wound on the winding roller, one end of the data line is connected to the wiring terminal on the winding roller, and the wiring terminal of the winding roller is electrically connected to the connecting piece, and the other end of the data line is connected to the first connecting end on the semi-ring seat, and the first connecting end is electrically connected to the strain gauge. A slot for facilitating the sliding of the connecting piece is provided between the upper ring body and the lower ring body, and rubber pads are provided on the surfaces of the upper ring body and the lower ring body where the slot is located.

[0022] The present invention provides a double-flat beam tension pressure sensor that is easy to replace parts, and has the following beneficial effects:

[0023] The double-flat beam tension pressure sensor, which is easy to replace parts, is designed with a spoke structure. It not only has a low height, but also improves the accuracy of the sensor. At the same time, a screw connection structure is provided to facilitate the installation and disassembly of the entire sensor. The internal assembly method is detachable, which facilitates the maintenance and replacement of its internal parts.

[0024] 1. The present invention facilitates the clamping of a fixture or a wrench by connecting the connecting bolts and setting the grooves, thereby facilitating the installation and removal of the sensor. The anti-slip coating increases the friction force of the outer surface of the connecting bolts, thereby avoiding loosening after connection, thereby improving the stability of the sensor after installation.

[0025] 2. The present invention facilitates the installation and disassembly of the pressure plate on the base through the movable connection between the fixing bolts and the pressure plate, thereby facilitating the maintenance and replacement of the internal parts of the sensor, and facilitates the positioning of the pressure plate during installation through the snap-fit ​​connection between the pressure plate and the slot.

[0026] 3. The present invention facilitates the disassembly and replacement of the wheel itself through the movable connection structure between the wheel hub and the base, and improves the force accuracy of the sensor through the integrated spoke structure; the "L"-shaped wiring harness sheath prevents wear at the bending part of the wire and better protects the outer surface of the wire; and the movable connection structure of the wiring harness sheath facilitates the adjustment of the wire direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the explosion structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the three-dimensional structure of the base of the present invention;

[0029] Figure 3 It is a schematic diagram of the top view structure of the present invention.

[0030] Figure 4 Schematic diagram of the displacement assembly of the present invention.

[0031] Figure 5 It is a schematic diagram of the structure inside the shift assembly of the present invention.

[0032] Figure 6 It is a partial enlarged view of the structure inside the shift assembly of the present invention.

[0033] In the figure: 1, base; 2, groove; 3, connecting bolt; 4, anti-slip coating; 5, wire harness sheath; 6, wire; 7, terminal; 8, extension wire; 9, strain gauge; 10, wheel hub; 11, spoke; 12, threaded rod; 13, pull ring; 14, fastening nut; 15, slot; 16, threaded hole; 17, pressure plate; 18, fixing bolt;

[0034] Semi-ring seat 101 , slot 102 , connecting piece 103 , data line 104 , first connecting end 105 , winding roller 106 , sliding block 107 , sliding groove 108 . DETAILED DESCRIPTION

[0035] See also Figure 1-3 The present invention provides a technical solution: a double-flat beam tension pressure sensor that is easy to replace parts, comprising:

[0036] A base 1, wherein a groove 2 is arranged on the outer side of the lower part of the base 1;

[0037] A connecting bolt 3 connected to the bottom of the base 1, and an anti-slip coating 4 is provided on the outer side of the connecting bolt 3;

[0038] A strain gauge 9 is installed in the middle of the inner side of the base 1. A wheel hub 10 is arranged on the upper side of the strain gauge 9, and spokes 11 are arranged on the outer side of the wheel hub 10.

[0039] A slot 15 is provided at the inner upper end of the base 1, and a threaded hole 16 is provided at the bottom of the slot 15;

[0040] The pressing plate 17 is disposed in the middle of the slot 15 , and a fixing bolt 18 is connected to the outer side of the pressing plate 17 .

[0041] The connecting bolt 3 and the base 1 are threadedly connected, and the anti-slip coating 4 and the connecting bolt 3 are tightly fitted. The connection of the connecting bolt 3 and the setting of the groove 2 facilitate the clamping of the clamp or wrench, thereby facilitating the installation and disassembly of the sensor. The setting of the anti-slip coating 4 increases the friction force of the outer surface of the connecting bolt 3, avoids loosening after connection, and thus improves the stability of the sensor after installation.

[0042] The fixing bolt 18 and the pressure plate 17 are movably connected, and the pressure plate 17 forms a snap-fit ​​structure with the base 1 through the slot 15. The movable connection between the fixing bolt 18 and the pressure plate 17 facilitates the installation and disassembly of the pressure plate 17 on the base 1, thereby facilitating the maintenance and replacement of the internal parts of the sensor, and the snap-fit ​​connection between the pressure plate 17 and the slot 15 facilitates the positioning of the pressure plate 17 during installation.

[0043] The spokes 11 and the wheel hub 10 are an integrated structure, and the wheel hub 10 and the base 1 are movably connected. The movable connection structure between the wheel hub 10 and the base 1 facilitates the disassembly and replacement of the wheel hub 10 itself, and the integrated spokes 11 improves the force accuracy of the sensor.

[0044] The base 1 is also provided with: a wiring harness sheath 5, which is connected to the lower right side of the base 1; a wire 6, which is arranged on the inner side of the wiring harness sheath 5, and the end of the wire 6 is connected to the extension wire 6 through the terminal 7. The wiring harness sheath 5 and the base 1 are movably connected, and the wiring harness sheath 5 is in an "L"-shaped structure. The "L"-shaped wiring harness sheath 5 prevents wear at the bending part of the wire 6, better protects the outer surface of the wire 6, and the movable connection structure of the wiring harness sheath 5 facilitates the adjustment of the direction of the wire 6.

[0045] The wheel hub 10 is also provided with a threaded rod 12, which is connected to the middle of the wheel hub 10, a pull ring 13 is provided at the upper end of the threaded rod 12, and a fastening nut 14 is arranged in the middle of the threaded rod 12. The pull ring 13 and the threaded rod 12 are an integrated structure, and the threaded rod 12, the wheel hub 10 and the fastening nut 14 are all threadedly connected. The arrangement of the threaded rod 12 and the pull ring 13 facilitates the connection between the sensor and the force-bearing mechanism, and the threaded connection between the threaded rod 12 and the wheel hub 10 facilitates the installation and disassembly of the threaded rod 12, and combined with the connection of the fastening nut 14, the threaded rod 12 is fixed after installation.

[0046] In summary, when using the double flat beam tension and pressure sensor that is easy to replace parts, first separate the wire 6 from the extension wire 8 through the wiring terminal 7, then loosen the fastening nut 14, and then remove the threaded rod 12 from the wheel 10, and then use the setting of the groove 2 to loosen the connecting bolt 3 using a clamp or a wrench to remove the sensor from the equipment, and then remove the fixing bolts 18 on the outside of the pressure plate 17 in turn, and take the pressure plate 17 out of the slot 15 at the upper end of the base 1, and then remove the wheel 10 and the strain gauge 9 in turn, and The parts inside the base 1 are replaced. During installation, the strain gauge 9, the wheel hub 10 and the pressure plate 17 are assembled in sequence, and then connected to the equipment through the connecting bolts 3. Combined with the setting of the anti-slip coating 4, the friction force on the outer surface of the connecting bolts 3 is increased to avoid loosening after connection. Then the threaded rod 12 is connected to the wheel hub 10. The threaded rod 12 is stressed to deform the spokes 11 on the wheel hub 10, and the strain gauge 9 is stressed according to a certain ratio, so that the bridge inside the strain gauge 9 is changed and converted into an electrical signal output.

[0047] See also Figure 4-6In order to avoid the problem of tension in the wiring at the wiring harness sheath 5, it is necessary to set the wiring harness sheath 5 to a position-adjustable form. A displacement component is provided on the outside of the base 1, and the displacement component includes a semi-ring seat 101 arranged on the outside of the base 1, and the semi-ring seat 101 is staggered with the groove 2. The semi-ring seat 101 includes a lower ring body and an upper ring body arranged at its upper end. A sliding groove 108 is provided on the upper end surface of the lower ring body, and a sliding block 107 is slidably matched in the sliding groove 108. A mounting cavity is provided in the sliding block 107, and a winding roller 106 is provided in the mounting cavity. The end of the winding roller 106 is rotatably connected to the inner wall of the mounting cavity through a fixed shaft, and a torsion spring is provided between the fixed shaft and the inner wall of the mounting cavity. The winding of the data line 104 is achieved by the rotation of the torsion spring. A connecting piece 1 for connecting the wiring harness sheath 5 is provided on the outside of the sliding block 107. 03, a data line 104 is wound on the winding roller 106, one end of the data line 104 is connected to the terminal on the winding roller 106, the terminal of the winding roller 106 is electrically connected to the connecting piece 103, the other end of the data line 104 is connected to the first connecting end 105 on the semi-ring seat 101, the first connecting end 105 is electrically connected to the strain gauge 9, a slot 102 is provided between the upper ring body and the lower ring body for easy sliding of the connecting piece 103, the upper ring body and the lower ring body where the slot 102 is located are provided with rubber pads, the rubber pads are used to achieve sealing of the slot 102, and the connecting piece 103 itself is a sheet structure, which can slide open the slot 102, and also plays a fixing role on the connecting piece 103, so that the position of the wiring harness sheath 5 can be rotated as needed, thereby avoiding the problem of wire tension and breakage due to changes in the position of the device.

Claims

1. Double flat beam tension pressure sensor that is easy to replace parts, characterized in that: include: A base, wherein a groove is arranged on the outer side of the lower part of the base; A connecting bolt connected to the bottom of the base, wherein an outer side of the connecting bolt is provided with an anti-slip coating; A strain gauge is installed in the middle of the inner side of the base, a wheel hub is arranged on the upper side of the strain gauge, and spokes are arranged on the outer side of the wheel hub; A card slot, which is arranged at the inner upper end of the base, and a threaded hole is opened at the bottom of the card slot; A pressing plate, which is arranged in the middle of the slot, and the outer side of the pressing plate is connected with a fixing bolt; The base also has: a wiring harness sheath connected to a lower right portion of the base; A wire is arranged inside the wire harness sheath, and an end of the wire is connected to an extension wire through a wiring terminal; A displacement component is provided on the outside of the base, and the displacement component includes a semi-ring seat arranged on the outside of the base, and the semi-ring seat is staggered with the groove. The semi-ring seat includes a lower ring body and an upper ring body arranged on the upper end thereof. A sliding groove is provided on the upper end surface of the lower ring body, and a sliding block is slidably matched in the sliding groove. A mounting cavity is provided in the sliding block, and a winding roller is provided in the mounting cavity. The end of the winding roller is rotatably connected to the inner wall of the mounting cavity through a fixed shaft, and a torsion spring is provided between the fixed shaft and the inner wall of the mounting cavity. The winding of the data line is achieved by the rotation of the torsion spring. A connecting piece for connecting the wiring harness sheath is provided on the outside of the sliding block. A data line is wound on the winding roller, and one end of the data line is connected to the wiring terminal on the winding roller, and the wiring terminal of the winding roller is electrically connected to the connecting piece. The other end of the data line is connected to the first connecting end on the semi-ring seat, and the first connecting end is electrically connected to the strain gauge. A slot is provided between the upper ring body and the lower ring body to facilitate the sliding of the connecting piece, and rubber pads are provided on the surfaces of the upper ring body and the lower ring body where the slot is located.

2. The double-flat beam tension and pressure sensor for easy replacement of parts according to claim 1 is characterized in that: The connecting bolt is threadedly connected to the base, and the anti-slip coating is tightly fitted to the connecting bolt.

3. The double-flat beam tension and pressure sensor for easy replacement of parts according to claim 1 is characterized in that: The fixing bolt and the pressing plate are movably connected, and the pressing plate forms a clamping structure with the base through a clamping groove.

4. The double-flat beam tension and pressure sensor for easy replacement of parts according to claim 1 is characterized in that: The spokes and the wheel hub are an integrated structure, and the wheel hub and the base are movably connected.

5. The double-flat beam tension and pressure sensor for easy replacement of parts according to claim 4 is characterized in that: The wiring harness sheath is movably connected to the base, and the wiring harness sheath is in an "L"-shaped structure.

6. The double-flat beam tension and pressure sensor for easy replacement of parts according to claim 1 is characterized in that: The wheel hub is also provided with: A threaded rod is connected to the middle part of the wheel hub, a pull ring is arranged at the upper end of the threaded rod, and a fastening nut is arranged at the middle part of the threaded rod.

7. The double-flat beam tension and pressure sensor for easy replacement of parts according to claim 6 is characterized in that: The pull ring and the threaded rod are an integrated structure, and the threaded rod is threadedly connected to the wheel hub and the fastening nut.

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