A preparation device and assembly process of a corrugated tube structure magneto-voltage pressure sensor

Abstract

The application provides a preparation device and an assembling process of a corrugated tube structure magnetoelectric pressure sensor, and belongs to the technical field of corrugated tubes. The application solves the problem of poor driving form of the existing corrugated tube composite stretching device. The preparation device comprises a composite stretching device, the composite stretching device comprises a rack, an upper base which is lifted and arranged on the rack, a lifting assembly for automatically driving the upper base to sequentially complete four operations of lowering, stopping, lifting and stopping, a turntable is arranged below the upper base, the bottom surface of the turntable is evenly divided into a plurality of core rods, a rotary driving element for driving the rotation of the turntable is arranged on the rack, and the rotary driving element only drives the rotation of the turntable when the upper base is at the highest position. Compared with the prior art, the preparation device separates the rotary motion of the switching station and the lifting motion of the feeding and discharging, but still maintains good motion continuity, so that the positioning mode is rapid and accurate.

Description

Technical Field

[0001] This invention belongs to the field of bellows technology and relates to a fabrication device and assembly process for a bellows structure magnetoelectric force sensor. Background Technology

[0002] Today, the rapidly developing Internet of Things (IoT) ecosystem represents a vast potential market for pressure sensors. The IoT has ushered in an era of intelligence, giving rise to well-known concepts such as smart cities, smart transportation, smart industry, smart homes, smart agriculture, and smart healthcare. The development of these fields relies heavily on sensors as a driving force, and pressure sensors are bound to see even broader application scenarios and stronger demand. The diverse range of applications brought about by the IoT presents a tremendous opportunity for the pressure sensor market.

[0003] The pressure sensor, designed with a stainless steel bellows structure, will revolutionize traditional ceramic piezoresistive and ceramic capacitive pressure sensors, bringing about a significant improvement in cost, reliability, and performance.

[0004] In the production process of stainless steel corrugated pipe structures, the most technically demanding part is the forming of the corrugated pipe. Regarding the development and processing of corrugated pipes, the applicant previously filed an invention patent application with patent number "CN202110165817.4" entitled "An Automatic Rotary Composite Stretching Device for Seamless Thin-Walled Tube Blanks and Its Stretching Method", which has now been granted.

[0005] The equipment (hereinafter referred to as the existing equipment) uses a lifting gearbox, a periodic operating component, a rotary gearbox, a rotary driven gear, and a rotary drive gear as power transmission components. The rotational power output by the drive element is converted into two functions: lifting the upper base and rotating the turntable. This enables the workpiece to descend (to transport the workpiece to the workstation), stop the workpiece (to provide sufficient time to complete the stretching operation), move the workpiece upward (to lift the workpiece that has completed the stretching operation), and rotate the workpiece 45° (to switch workstations).

[0006] The upper base needs to perform four functions: lowering, pausing for a certain period of time after lowering to the lowest position (to allow sufficient time to complete the stretching operation), raising, and pausing for a certain period of time after raising to the highest position (to allow sufficient time to complete the turntable's workstation switching operation). The turntable only needs to rotate when the upper base is in the highest position.

[0007] During the applicant's continued research and development, it was discovered that the equipment described in the original application still had elements that needed improvement. The main issue was that the use of a single drive element to achieve both base lifting and turntable rotation would place high power requirements on the drive element. Furthermore, the lowering process of the upper base was completed by a lead screw, which resulted in a long time consumption during the lifting and lowering process. Summary of the Invention

[0008] The purpose of this invention is to address the problem of poor driving mechanism in existing corrugated pipe composite stretching devices, and to propose a fabrication device and assembly process for a corrugated pipe structure magnetoelectric force sensor.

[0009] The objective of this invention can be achieved through the following technical solutions:

[0010] A fabrication apparatus for a bellows-structured magnetoelectric force sensor, characterized in that it includes a composite stretching device, comprising a frame, an upper base mounted on the frame, and a lifting assembly for driving the upper base to automatically complete four operations sequentially: descent, pause, ascent, and pause. A turntable is located below the upper base, with several core rods evenly distributed around its bottom circumference. A rotational drive element is mounted on the frame to drive the turntable's rotation, and this drive element only drives the turntable when the upper base is initially at its highest position. The lifting assembly includes a bracket fixed relative to the frame, a lifting drive element fixedly mounted on the bracket, a drive gear fixedly sleeved on the lifting drive element, two driven shafts rotatably mounted on the bracket, and two driven shafts respectively fixedly sleeved on the two driven shafts. The driven shaft has a driven gear and two drive wheels, a limiting block fixedly mounted on the bracket, and a lifting rod with a limiting groove that is raised and lowered on the limiting block. The bottom of the lifting rod is used to connect with the upper base. Two sets of racks are symmetrically arranged on both sides of the lifting rod. The two driven gears mesh with the two sides of the drive gear. The drive wheels are arranged on the same plane as the lifting rod. The outer rings of the two drive wheels are respectively attached to the two sets of racks. The outer rings of the drive wheels have partially continuous teeth. When the teeth mesh with the racks, they will drive the lifting rod to move up and down. When the teeth of any one drive wheel mesh with the corresponding rack, the teeth of the other drive wheel will not mesh with the other rack. The limiting block and the lifting rod are provided with a self-locking structure that locks each other when there is no external force.

[0011] In the aforementioned apparatus for fabricating a bellows-structured magnetoelectric force sensor, the toothed body occupies an angle of 90 degrees around the outer ring of the drive wheel, and the two drive wheels rotate in parallel motions.

[0012] In the aforementioned fabrication apparatus for a bellows-structured magnetoelectric force sensor, the self-locking mechanism includes a magnetic block fixedly disposed within a limiting block. The lifting rod is entirely made of magnetically absorbing material, and when the lifting rod moves to any position in the height direction, it will be fixed to the limiting block under the attraction of the magnetic block.

[0013] In the above-mentioned fabrication device for a bellows structure magnetoelectric force sensor, a switch assembly is also provided above the lifting rod. The switch assembly is used to control the start and stop of the rotary drive element. When the lifting rod is raised to the highest position, the switch assembly is activated to make the rotary drive element work. The duration for which the lifting rod stays at the highest position at a time causes the rotary drive element to drive the turntable to rotate to the core rod to switch to one working position.

[0014] In the aforementioned fabrication apparatus for a bellows-structured magnetoelectric force sensor, the switching assembly includes a conductive rod, an insulating block fixedly mounted on a support, two insulating sheets symmetrically arranged on the bottom surface of the insulating block, two insulating rods symmetrically arranged on the bottom surface of the insulating block, and a pressing head fixedly mounted on the top of a lifting rod that does not have conductive capability. The two insulating rods are located between the two insulating sheets, and the bottom surface of the insulating rods is provided with insulating pads. The conductive rods have two through holes identical to those on the insulating rods. The conductive rods are raised and lowered on the conductive rods through the two through holes. A spring is fitted on the insulating rods, which can push the insulating rods, which are not subject to external force, down to a position where they fit against the insulating pads. A conductive head is fixedly mounted on the insulating sheet. After the insulating rods are pressed up by the pressing head below, both ends of the rods can contact the conductive head. The tail end of the conductive head is provided with a wire, which is connected to the circuit where the rotary drive element is located. After the wire passes through, the circuit is connected, enabling the rotary drive element to work.

[0015] In the aforementioned fabrication apparatus for a bellows-structured magnetoelectric force sensor, the outer ring of the turntable is provided with a driven disk, and the output shaft of the rotary drive element is provided with a drive disk. When the upper base is raised to the highest position, the driven disk and the drive disk are in contact with each other to achieve power transmission.

[0016] In the aforementioned apparatus for fabricating a bellows-structured magnetoelectric force sensor, the driven disk is replaced by a first gear, and the driving disk is replaced by a second gear.

[0017] An assembly process for a bellows-structured magnetoelectric force sensor prepared using the aforementioned fabrication apparatus is characterized by comprising the following steps: installing a bellows formed by the aforementioned composite stretching equipment inside a metal base, installing a connector at the upper end of the metal base, welding a magnet bracket inside the bellows, welding a welding flange at the upper end of the bellows, welding the welding flange to the metal base, fixing a magnetic ring on the magnet bracket, installing a PCB mounting base at the lower end of the connector, installing a PCB board inside the PCB mounting base, and welding a magnetic sensing chip onto the PCB board.

[0018] Compared with existing technologies, this preparation device separates the rotational motion of the switching station from the lifting motion of loading and unloading, but still maintains good motion continuity, making the positioning method fast and accurate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the preparation apparatus;

[0020] Figure 2 This is a structural diagram of the lifting assembly;

[0021] Figure 3 This is a structural diagram illustrating the working relationship between the lifting assembly and the switching assembly;

[0022] Figure 4 This is a schematic diagram of the lifting component in the first scenario during its motion cycle operation.

[0023] Figure 5 This is a schematic diagram of the lifting component in the second scenario during its motion cycle operation.

[0024] Figure 6 This is a schematic diagram of the lifting component in the third scenario during its motion cycle operation.

[0025] Figure 7 This is a schematic diagram of the lifting component in the fourth scenario during its motion cycle operation.

[0026] Figure 8 This is a schematic diagram of the lifting component in the fifth scenario during its motion cycle operation.

[0027] Figure 9 This is a schematic diagram of the lifting component in the sixth scenario during its motion cycle operation.

[0028] In the diagram, 1. Frame; 2. Upper base; 3. Turntable; 4. Core rod; 5. Rotary drive element; 6. Support; 7. Lifting drive element; 8. Drive gear; 9. Driven shaft; 10. Driven gear; 11. Drive wheel; 12. Limit block; 13. Limit groove; 14. Lifting rod; 15. Rack; 16. Gear body; 17. Conductive rod; 18. Insulating block; 19. Insulating sheet; 20. Insulating rod; 21. Extrusion head; 22. Insulating gasket; 23. Spring; 24. Conductive head; 25. Wire; 26. Driven disc; 27. Drive disc. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0030] like Figure 1As shown, the fabrication apparatus for the bellows structure magnetoelectric force sensor includes a composite stretching device. The composite stretching device includes a frame 1, an upper base 2 that is lifted and mounted on the frame 1, and a lifting assembly for driving the upper base 2 to automatically complete four operations in sequence: descent, stop, rise, and stop. A turntable 3 is provided below the upper base 2. Several core rods 4 are evenly distributed around the bottom circumference of the turntable 3. A rotary drive element 5 is provided on the frame 1 for driving the turntable 3 to rotate. The rotary drive element 5 only drives the turntable 3 when the upper base 2 is initially at its highest position.

[0031] The working principle of the composite stretching device refers to the existing devices mentioned in the background art. The biggest difference between the existing devices previously applied for by the applicant and the present invention is the redesign of the lifting component.

[0032] like Figure 2 As shown, the lifting assembly includes a bracket 6 fixed relative to the frame 1, a lifting drive element 7 fixedly mounted on the bracket 6, a drive gear 8 fixedly sleeved on the lifting drive element 7, two driven shafts 9 rotatably mounted on the bracket 6, a set of driven gears 10 and two drive discs 11 respectively fixedly sleeved on the two driven shafts 9, a limiting block 12 fixedly mounted on the bracket 6, and a lifting rod 14 having a limiting groove 13 and being lifted and lowered on the limiting block 12 through the limiting groove 13. The bottom of the lifting rod 14 is used to connect with the upper base 2, and two sets of racks 15 are symmetrically arranged on both sides of the lifting rod 14. Two driven gears 10 are respectively meshed on both sides of the drive gear 8. The drive wheel 11 and the lifting rod 14 are set on the same plane. The outer rings of the two drive wheel 11 are respectively attached to two sets of racks 15. The outer ring of the drive wheel 11 is provided with a partially continuous tooth body 16. After the tooth body 16 meshes with the rack 15, it will drive the lifting rod 14 to move up and down. When the tooth body 16 of any one drive wheel 11 meshes with the corresponding rack 15, the tooth body 16 of the other drive wheel 11 will not mesh with the other rack 15. The limiting block 12 and the lifting rod 14 are provided with a self-locking structure that locks each other when there is no external force.

[0033] The drive gear 8 and the driven gear 10 can be the same type of gear. During operation, if the driven gear 10 rotates counterclockwise, the driven gears 10 meshing with the driven gear 10 will rotate clockwise synchronously, and the drive wheel 11 coaxial with the driven gear 10 will also rotate clockwise.

[0034] In this embodiment, the angle range of the tooth body 16 occupying the outer ring of the drive wheel 11 is controlled at about 90 degrees, and then the two drive wheels 11 are made to rotate in parallel motion. Then by... Figures 4-9 The figure shows the movement trajectory of the lifting rod 14 within one cycle of motion, with both drive wheels 11 rotating clockwise.

[0035] Figure 4At this time, the lifting lever 14 is in its highest position, and the teeth 16 of the left drive wheel 11 are about to mesh with the left rack 15; because the drive wheel 11 rotates clockwise, the teeth 16 of the left drive wheel 11 will move down to the left rack 15, that is, the lifting lever 14 moves down, thus... Figure 5 This process involves the upper base 2 moving downwards; then, when the teeth 16 of the left drive wheel 11 are completely separated from the left rack 15, it will proceed as follows: Figure 6 As shown, the lifting rod 14 moves to its lowest position; for the next period of time, the gear 16 of the left drive wheel 11 ceases operation, and the gear 16 of the right drive wheel 11 does not immediately contact the right rack 15, so this period is the first idle period. During this time, the lifting rod 14 remains at its lowest position, and the reserved time is used to complete the lifting process; until Figure 7 At that time, the tooth 16 of the right drive wheel 11 is about to mesh with the right rack 15; then, after the tooth 16 of the right drive wheel 11 meshes with the right rack 15, they interact to perform... Figure 8 This is the process of the upper base 2 moving upwards; then, when the tooth 16 of the right drive wheel 11 is completely separated from the right rack 15, it will be as follows: Figure 9 As shown, the lifting rod 14 moves back to its highest position; similarly, because the gear 16 of the right drive wheel 11 is no longer working, and the gear 16 of the left drive wheel 11 does not immediately contact the left rack 15, the lifting rod 14 will remain at its highest position for a period of time. This period is used for the rotation drive element 5 to drive the turntable 3 to rotate and switch work positions; then Figure 9 After rotating a full circle at various times, it will return to Figure 1 The initial state is set in order to proceed with the next cycle.

[0036] so, Figures 4-9 It demonstrates the four processes of the lifting boom 14 (with the upper base 2) descending, stopping, rising, and stopping again.

[0037] The self-locking mechanism includes a magnetic block fixedly installed inside the limiting block 12. The lifting rod 14 is made entirely of magnetic material. When the lifting rod 14 moves to any position in the height direction, it will be fixed on the limiting block 12 by the attraction of the magnetic block.

[0038] Because the corrugated pipe itself is a lightweight object, the upper base 2 does not need to be made of high-strength materials such as steel. The upper base 2 and the turntable 3 can be made of lightweight materials. At this time, if the magnetic block is made larger (the size is drawn smaller in the attached figure to illustrate the principle, but in reality the magnetic block can be made larger, and the lifting rod 14 and other objects can be made larger to increase strength), the attraction of the magnetic block is enough to allow the lifting rod 14 to carry the upper base 2 to complete the self-locking fixation.

[0039] A switch assembly is also provided above the lifting rod 14. The switch assembly is used to control the start and stop of the rotary drive element 5. When the lifting rod 14 is raised to the highest position, the switch assembly is activated to make the rotary drive element 5 work. The duration for which the lifting rod 14 stays at the highest position is just enough for the rotary drive element 5 to drive the turntable 3 to rotate to the core rod 4 to switch the work position once.

[0040] Because the lifting rod 14 needs to stay at its highest position for a certain period of time, this time is for the rotary drive element 5 to work and switch the workpiece position of the turntable 3. Since there is a specific situation where the lifting rod 14 is at its highest point and stays there for a certain period of time (otherwise the rotary drive element 5 does not need to operate), a switch assembly can be designed above the lifting rod 14. After the lifting rod 14 is raised to its highest point, it will contact the switch assembly. Then the switch assembly is directly connected to the rotary drive element 5, which can control the start and stop of the rotary drive element 5.

[0041] like Figure 3 As shown, the switch assembly includes a conductive rod 17, an insulating block 18 fixedly mounted on a bracket 6, two insulating sheets 19 symmetrically arranged on the bottom surface of the insulating block 18, two insulating rods 20 symmetrically arranged on the bottom surface of the insulating block 18, and a pressing head 21 fixedly mounted on the top of the lifting rod 14 that does not have conductive capability. The two insulating rods 20 are located between the two insulating sheets 19. An insulating pad 22 is provided on the bottom surface of the insulating rod 20. Two through holes identical to those of the insulating rods 20 are provided on the conductive rod 17. The conductive rod 17 is raised and lowered through the two through holes. A spring 23 is fitted on the insulating rod 20. The spring 23 can push the insulating rod 20, which is not subject to external force, down to a position where it fits against the insulating pad 22. A conductive head 24 is fixedly mounted on the insulating sheet 19. After the insulating rod 20 is pressed up by the pressing head 21 below, its two ends can contact the conductive head 24. A wire 25 is provided at the tail end of the conductive head 24. The wire 25 is connected to the circuit where the rotary drive element 5 is located. After the wire 25 is connected, the circuit is connected, enabling the rotary drive element 5 to work.

[0042] During the process of the lifting rod 14 moving to the highest position, the extrusion head 21 rises until it contacts the bottom of the conductive rod 17, and then pushes the conductive rod 17 to a high position. Just as the conductive rod 17 is pushed to the highest position, it will contact the conductive head 24, allowing the circuit to be open. The rotary drive element 5 will start automatically. Then, the time left when the lifting rod 14 is at the highest position is designed so that the rotary drive element 5 rotates the turntable 3 to switch the angle of a work station. The lifting rod 14 will immediately begin to descend. The conductive rod 17, which has lost its support, will immediately separate from the conductive rod 17 under the action of the spring 23. The circuit will be broken instantly, and the rotary drive element 5 will also stop operating immediately.

[0043] The outer ring of the turntable 3 is provided with a driven disk 26, and the output shaft of the rotary drive element 5 is provided with a drive disk 27. When the upper base 2 is raised to the highest position, the driven disk 26 and the drive disk 27 are in contact with each other to achieve power transmission. Of course, the driven disk 26 can be replaced by the first gear, and the drive disk 27 can be replaced by the second gear.

[0044] An assembly process for a bellows-structured magnetoelectric force sensor prepared using a fabrication apparatus includes the following steps: installing a bellows formed by a composite stretching device inside a metal base, installing a connector at the upper end of the metal base, welding a magnet bracket inside the bellows, welding a welding flange at the upper end of the bellows, welding the welding flange to the metal base, fixing a magnetic ring on the magnet bracket, installing a PCB mounting base at the lower end of the connector, installing a PCB board inside the PCB mounting base, and welding a magnetic sensing chip onto the PCB board.

[0045] It should be understood that in the claims and description of this invention, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0046] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A fabrication apparatus for a bellows-structured magnetoelectric force sensor, characterized in that: The equipment includes a composite stretching device, comprising a frame, an upper base mounted on the frame, and a lifting assembly for automatically performing four operations sequentially: descent, pause, ascent, and pause. A turntable is located below the upper base, with several core rods evenly distributed around its bottom circumference. A rotary drive element is mounted on the frame to rotate the turntable, only driving it when the upper base is initially at its highest position. The lifting assembly includes a bracket fixed relative to the frame, a lifting drive element fixedly mounted on the bracket, a drive gear fixedly sleeved on the lifting drive element, two driven shafts rotatably mounted on the bracket, and two driven gears fixedly sleeved on the two driven shafts respectively. A drive wheel, a limiting block fixed on a bracket, and a lifting rod with a limiting groove that is raised and lowered on the limiting block. The bottom of the lifting rod is used to connect with the upper base. Two sets of racks are symmetrically arranged on both sides of the lifting rod. Two driven gears mesh on both sides of the drive gear. The drive wheel and the lifting rod are set on the same plane. The outer rings of the two drive wheels are respectively attached to the two sets of racks. The outer ring of the drive wheel has a partially continuous tooth body. When the tooth body meshes with the rack, it will drive the lifting rod to move up and down. When the tooth body of any one drive wheel meshes with the corresponding rack, the tooth body of the other drive wheel will not mesh with the other rack. A self-locking structure is provided between the limiting block and the lifting rod to lock each other when there is no external force. A switch assembly is also provided above the lifting rod. The switch assembly is used to control the start and stop of the rotary drive element. When the lifting rod is raised to the highest position, the switch assembly is activated to make the rotary drive element work. The duration for which the lifting rod stays at the highest position at a time causes the rotary drive element to drive the turntable to rotate to the core rod to switch to one working position. The switch assembly includes a conductive rod, an insulating block fixedly mounted on a bracket, two insulating sheets symmetrically arranged on the bottom surface of the insulating block, two insulating rods symmetrically arranged on the bottom surface of the insulating block, and a non-conductive pressing head fixedly mounted on the top of the lifting rod. The two insulating rods are located between the two insulating sheets, and the bottom surface of the insulating rods is provided with insulating pads. The conductive rods have two through holes identical to those on the insulating rods. The conductive rods are raised and lowered on the conductive rods through the two through holes. A spring is fitted on the insulating rods, which can push the insulating rods down to a position where they are in contact with the insulating pads when not subjected to external force. A conductive head is fixedly mounted on the insulating sheet. After the insulating rods are pressed up by the pressing head below, both ends of the rods can contact the conductive head. The tail end of the conductive head is provided with a wire, which is connected to the circuit of the rotary drive element. When the wire is connected, the circuit is closed, enabling the rotary drive element to operate.

2. The apparatus for fabricating a bellows structure magnetoelectric force sensor according to claim 1, characterized in that: The toothed body occupies a 90-degree angle on the outer ring of the drive wheel, and the two drive wheels rotate in parallel motion.

3. The apparatus for fabricating a bellows-structure magnetoelectric force sensor according to claim 1, characterized in that: The self-locking structure includes a magnetic block fixedly installed inside the limiting block. The lifting rod is made entirely of magnetic material. When the lifting rod moves to any position in the height direction, it will be fixed to the limiting block by the attraction of the magnetic block.

4. The apparatus for fabricating a bellows structure magnetoelectric force sensor according to claim 1, characterized in that: The outer ring of the turntable is provided with a driven disk, and the output shaft of the rotary drive element is provided with a drive disk. When the upper base is raised to the highest position, the driven disk and the drive disk are in contact with each other to realize power transmission.

5. The apparatus for fabricating a bellows structure magnetoelectric force sensor according to claim 4, characterized in that: The driven disk is replaced by the first gear, and the driving disk is replaced by the second gear.

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