Reconstituted tobacco drying oven with anti-falling function

Abstract

The utility model relates to the field of reconstituted tobacco production equipment, and provides a reconstituted tobacco drying oven with an anti-falling function, which comprises an upper jacking anti-falling mechanism connected with an upper drying oven and a lower drying oven, and a control mechanism used for processing electric signals and controlling the jacking anti-falling mechanism, a distance measuring mechanism and a warning mechanism. The oven is in an inspection state; an anti-falling function and a warning function are added for the reconstituted tobacco drying oven in an inspection state, so that the personal safety of maintenance personnel during inspection of the drying oven is ensured; the jacking anti-falling mechanism comprises a ratchet wheel mechanism, by means of the working characteristics of the ratchet wheel mechanism, when the drying oven is in the inspection state, the jacking anti-falling mechanism jacks the upper drying oven for a certain distance so that maintenance personnel can conveniently conduct maintenance and inspection operation on the interior of the drying oven, and after jacking of the lead screw is completed, the jacking anti-falling mechanism enters a self-locking state, so that falling prevention is conducted. The lifting anti-falling mechanism in the self-locking state can prevent the upper drying oven from falling suddenly to cause accidents when power is cut off suddenly.

Description

Technical Field

[0001] This patent relates to the field of reconstituted tobacco production equipment, specifically to a reconstituted tobacco drying oven with anti-fall function. Background Technology

[0002] Reconstituted tobacco, also known as tobacco sheets, refers to a recycled product made from waste materials such as tobacco stems, dust, and broken tobacco leaves discarded during cigarette manufacturing. It is produced in sheet or filament form and used as a filling material for cigarettes. Reconstituted tobacco plays a crucial role in cigarette production, not only reducing costs but also improving the intrinsic quality of cigarettes. The manufacture of reconstituted tobacco began in the 1950s, primarily using the slurry process, roll pressing, and papermaking process. The papermaking process is further divided into wet and dry papermaking. Compared to the currently produced roll pressing and slurry process reconstituted tobacco, papermaking reconstituted tobacco has unique advantages, including lower density and higher filling value; better mechanical processing resistance and higher filament yield; faster combustion speed and lower tar release; and better product plasticity.

[0003] Curing reconstituted tobacco leaves is a crucial step in the reconstituted tobacco process, and its quality directly affects the quality of the finished tobacco shreds. The basic principle of tobacco curing is to use hot air to dry the tobacco leaves, removing moisture and causing them to turn yellow and dry. Multiple reconstituted tobacco drying ovens work together to cure the tobacco sheets, improving curing efficiency. Therefore, to ensure curing quality, regular maintenance and inspection of the drying ovens are necessary. Figure 1 As shown, during this process, maintenance personnel typically extend their bodies into the oven for brief inspections and repairs after the lifting cylinder has raised the oven lid. This poses a significant safety hazard, as the oven lid could easily fall due to unstable air pressure, sudden power outages, or cylinder malfunctions, leading to an accident. The demand for reconstituted tobacco production is unstable, ranging from sudden large-scale production to long-term shutdowns and assembly line production. Current reconstituted tobacco oven designs only consider short-term cleaning and do not account for long-term shutdowns for maintenance or inspections, or for prolonged periods of inactivity (inspection) due to process requirements. This significantly increases the risk of the cylinder failing to maintain the raised position or the oven falling after being raised. Utility Model Content

[0004] To ensure the safety of maintenance personnel operating reconstituted tobacco drying ovens, improve the safety and stability of the ovens during inspections, and enhance the means of preventing safety accidents, this patent provides the following technical solutions:

[0005] A reconstituted tobacco drying oven with anti-fall function includes: an upper drying oven, a lower drying oven, and a lifting and anti-fall mechanism. The lifting and anti-fall mechanism includes a ratchet mechanism, a support arm assembly, and a screw assembly. The ratchet mechanism is disposed between the support arm assemblies. The lifting and anti-fall mechanism includes a lifting function and an anti-fall function. When the reconstituted tobacco drying oven is in the inspection state, the upper drying oven is lifted by the screw assembly and moved away from the lower drying oven. The ratchet mechanism rotates normally between the support arm assemblies. After the upper drying oven is lifted, the ratchet mechanism enters a self-locking anti-fall state.

[0006] Furthermore, the ratchet mechanism includes a ratchet assembly, a locking hook assembly, and a micro motor assembly. The ratchet mechanism is a unidirectional motion mechanism. The locking hook assembly engages with the ratchet assembly under the drive of the micro motor assembly; or the locking hook assembly rotates together with the ratchet assembly under the drive of the micro motor assembly.

[0007] Furthermore, the ratchet assembly includes a first ratchet and a second ratchet; the locking hook assembly includes a first locking hook and a second locking hook; and the micro-motor assembly includes a first auxiliary motor and a second auxiliary motor.

[0008] Furthermore, the lead screw assembly includes a lead screw and a main motor, the lead screw being able to extend or retract in the axial direction under the drive of the main motor; the upper oven includes a fixing member for connecting the lifting and anti-fall mechanism.

[0009] Furthermore, the support arm assembly extends when the lead screw assembly extends; or the support arm assembly retracts when the lead screw assembly retracts; the support arm assembly includes a first support arm, a second support arm, a third support arm, and a fourth support arm.

[0010] Furthermore, the lifting and fall-prevention mechanism also includes a lifting plate, a connecting assembly, a support plate, and a load-bearing platform; the lifting plate is located at the top of the lifting and fall-prevention mechanism and is used to connect to the upper oven, the connecting assembly is located on the screw assembly, and the support plate and load-bearing platform are located at the bottom of the lifting and fall-prevention mechanism and are used to stabilize the lifting and fall-prevention mechanism; the connecting assembly includes a screw nut, a first connecting member, and a second connecting member.

[0011] Furthermore, the reconstituted tobacco drying oven also includes a control mechanism, which is used to receive, convert, and transmit electrical signals. The control mechanism is located adjacent to the lower drying oven.

[0012] Furthermore, the reconstituted tobacco drying oven also includes an alarm mechanism. The alarm mechanism is connected to an independent power supply and is located on the top of the upper drying oven. The alarm mechanism issues an alarm after receiving an electrical signal from the control box.

[0013] Furthermore, the reconstituted tobacco drying oven also includes a distance measuring mechanism, which is activated after the upper drying oven is raised. The distance measuring mechanism is used to measure the distance between the upper and lower drying ovens in real time.

[0014] Furthermore, the ranging mechanism includes a first ranging element and a second ranging element. The first ranging element is disposed at the bottom end of the side of the upper oven, and the second ranging element is disposed at the top end of the side of the lower oven. The sides of the upper and lower ovens are disposed on the same side.

[0015] This patent has the following beneficial effects:

[0016] 1. This patent relates to the field of reconstituted tobacco production equipment, and provides a reconstituted tobacco drying oven with an anti-fall function. It includes an upper lifting anti-fall mechanism connecting the upper and lower drying ovens, and a control mechanism for processing electrical signals and controlling the lifting anti-fall mechanism, the ranging mechanism, and the alarm mechanism. When the upper and lower drying ovens are separated into two parts, the oven is in an inspection state. This patent adds anti-fall and alarm functions to the reconstituted tobacco drying oven in the inspection state to ensure the personal safety of maintenance personnel inspecting the oven.

[0017] 2. The lifting and anti-fall mechanism in this patent integrates lifting and anti-fall functions. The lifting and anti-fall mechanism includes a ratchet mechanism. Utilizing the working characteristics of the ratchet mechanism, when the oven is in inspection mode, the lifting and anti-fall mechanism lifts the upper oven a certain distance to facilitate maintenance personnel to perform maintenance and inspection work inside the oven. After the lead screw lifts the oven, the lifting and anti-fall mechanism enters a self-locking state to prevent falls. The lifting and anti-fall mechanism in the self-locking state can prevent the upper oven from suddenly falling and causing an accident in the event of a sudden power outage.

[0018] 3. The protection and alarm mechanisms of this patent are equipped with independent backup power supplies, which can ensure the safety of maintenance personnel even in the event of power outages or other emergencies; this patent also has a distance measuring mechanism that can measure the distance between the upper and lower ovens in real time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this patent, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this patent and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A three-dimensional schematic diagram of a reconstructed tobacco drying oven in the prior art;

[0021] Figure 2 This is a three-dimensional schematic diagram of the reconstructed tobacco drying oven for this patent.

[0022] Figure 3 This is a three-dimensional schematic diagram of the lifting and anti-fall mechanism of this patent.

[0023] The reference numerals in the attached figures are explained as follows:

[0024] 100: Top oven;

[0025] 110: Fasteners;

[0026] 200: Lower oven;

[0027] 300: Lifting and fall protection mechanism;

[0028] 311: First ratchet;

[0029] 312: Second ratchet;

[0030] 321: First lock hook;

[0031] 322: Second lock hook;

[0032] 331: First auxiliary motor;

[0033] 332: Second auxiliary motor;

[0034] 340: Lead screw;

[0035] 350: Main motor;

[0036] 360: Lifting plate;

[0037] 371: First support arm;

[0038] 372: Second support arm;

[0039] 373: Third support arm;

[0040] 374: Fourth support arm;

[0041] 381: Lead screw nut;

[0042] 382: First connector;

[0043] 383: Second connector;

[0044] 391: Support plate;

[0045] 392: Load-bearing platform;

[0046] 400: Control mechanism;

[0047] 500: Distance measuring mechanism;

[0048] 510: First rangefinder;

[0049] 520: Second rangefinder;

[0050] 600: Alert number. Detailed Implementation

[0051] The detailed features and advantages of this patent are described below in the specific embodiments. The content is sufficient to enable any person skilled in the art to understand the technical content of this patent and implement it accordingly. Based on the specification, claims and drawings disclosed in this specification, a person skilled in the art can easily understand the related objectives and advantages of this patent.

[0052] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0053] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not indicate the only possible implementation. The terms "upper," "lower," etc., indicating orientation or positional relationships are defined with reference to the coordinates of the accompanying drawings and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent. The terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this patent belongs. The terminology used herein in the specification of this patent is for the purpose of describing particular embodiments only and is not intended to be limiting of this patent. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0055] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. It is divided into electric motors (symbol M) and generators (symbol G).

[0056] Electric motors include DC motors, asynchronous motors, and synchronous motors. Synchronous motors can be further classified into permanent magnet synchronous motors, reluctance synchronous motors, and hysteresis synchronous motors; asynchronous motors can be classified into induction motors and AC commutator motors; DC motors can be classified according to their structure and working principle into brushless DC motors and brushed DC motors (permanent magnet DC motors and electromagnetic DC motors).

[0057] Permanent magnet DC motors also consist of stator poles, rotor, brushes, and housing. The stator poles use permanent magnets (permanent steel), made of materials such as ferrite, AlNiCo, and NdFeB. Based on their structural form, they can be divided into several types, including cylindrical and block-type. Most motors used in VCRs and players use cylindrical magnets, while motors used in power tools and automotive electrical appliances mostly use block-type magnets.

[0058] A brushless DC motor consists of a permanent magnet rotor, a multi-pole winding stator, and a position sensor. The position sensor commutates the current in the stator windings in a specific sequence according to changes in the rotor position. The operating voltage of the stator windings is provided by an electronic switching circuit controlled by the position sensor output.

[0059] An AC asynchronous motor is an electric motor that operates using alternating current (AC) voltage. AC asynchronous motors are divided into induction motors and AC commutator motors. Induction motors are further divided into single-phase asynchronous motors, AC / DC universal motors, and repulsion motors. The motor's speed (rotor speed) is less than the speed of the rotating magnetic field, hence the name asynchronous motor.

[0060] Synchronous motors, like induction motors, are commonly used AC motors. Their key characteristic is that, during steady-state operation, the rotor speed and the power grid frequency maintain a constant relationship. If the power grid frequency remains constant, the synchronous motor's speed in steady state is always constant and independent of the load. Synchronous motors are classified into synchronous generators and synchronous motors.

[0061] A micro motor is a motor with a diameter of less than 160 mm or a rated power of less than 750 mW. Micro motors are commonly used in control systems or mechanical loads to perform functions such as detection, analysis, amplification, execution, or conversion of electromechanical signals or energy.

[0062] Micromotors encompass a wide variety of categories, broadly categorized into 13 major types: DC motors, AC motors, self-regulating angle motors, stepper motors, rotary transformers, shaft angle encoders, AC / DC universal motors, tachogenerators, inductive synchros, linear motors, piezoelectric motors, motor units, and other special-purpose motors. Micromotors integrate high-tech industries from multiple disciplines, including electrical engineering, microelectronics, power electronics, computers, automatic control, precision machinery, and new materials. In particular, the application of electronic and new materials technologies has driven the advancement of micromotor technology.

[0063] The main types of micromotors currently available include: electrostatic, electromagnetic, magnetostrictive, piezoelectric, and shape memory alloy types. Among them, electrostatic and electromagnetic types use non-contact drive between the rotor and stator, shape memory alloy types use direct drive, and piezoelectric and magnetostrictive types use contact drive and have holding force.

[0064] In various applications such as microrobotics, precision engineering, and aerospace, micromotors combine the dual functions of driving and precision control. The driving can be linear, rotational, or multi-degree-of-freedom; the control target can be position, velocity, or force (torque). Therefore, from an application perspective, micromotors should meet the following basic requirements: under the premise of small size and light weight, they should be able to generate a large amount of motion displacement, output large power, have low power consumption, high control precision, and fast response.

[0065] A position sensor is a sensor that detects the position of a measured object and converts it into a usable output signal. It is mainly divided into contact sensors and proximity sensors.

[0066] Contact sensors operate by the contact and pressure of two objects. Common examples include limit switches and two-dimensional matrix position sensors. Limit switches are simple in structure, reliable in operation, and inexpensive. When an object moves and encounters a limit switch, its internal contacts activate, thus controlling the movement. For example, installing limit switches at both ends of the X, Y, and Z axes of a machining center allows for control of the movement range. Two-dimensional matrix position sensors are installed inside the palm of a robotic arm to detect the contact position between the arm and an object.

[0067] Proximity sensors are equipped with proximity switches, which are switches that emit an "action" signal when an object approaches within a set distance, without requiring direct contact with the object. There are many types of proximity switches, mainly including electromagnetic, photoelectric, differential transformer, eddy current, capacitive, reed switch, and Hall effect switches. In CNC machine tools, proximity switches are primarily used for tool selection control, table travel control, and piston travel control for hydraulic and pneumatic cylinders.

[0068] A laser displacement sensor is a sensor that uses laser technology for measurement. It consists of a laser, a laser detector, and a measurement circuit. Laser sensors are a new type of measuring instrument capable of accurately and non-contactly measuring changes in the position and displacement of an object. Based on their measurement principles, laser displacement sensors are classified into two methods: laser triangulation and laser echo analysis. Laser triangulation is generally suitable for high-precision, short-distance measurements, while laser echo analysis is used for long-distance measurements.

[0069] To make the objectives, technical solutions, and advantages of this patent clearer, the embodiments of this patent will be described in further detail below with reference to the accompanying drawings.

[0070] like Figure 2As shown, a reconstituted tobacco drying oven with anti-fall function is used as a drying device in the reconstituted tobacco drying process. The reconstituted tobacco drying oven is referred to as "drying oven" below. It includes an upper drying oven 100, a lower drying oven 200, a lifting anti-fall mechanism 300, a control mechanism 400, a distance measuring mechanism 500, and an alarm mechanism 600. The upper drying oven 100 and the lower drying oven 200 are two cubic structures of the same shape and size and symmetrically arranged along the axial direction. The upper drying oven 100 and the lower drying oven 200 respectively include two smaller side surfaces and two larger side surfaces.

[0071] Specifically, when the oven is in operation, the bottom surfaces of the upper oven 100 and the lower oven 200 are in close contact; when the oven is in inspection mode, the bottom surface of the upper oven 100 separates from the bottom surface of the lower oven 200, causing the two ovens to separate into two parts, and the height difference between the two ovens facilitates maintenance and inspection by maintenance personnel.

[0072] Specifically, a fixing member 110 is provided at the bottom of the side of the upper oven 100. The fixing member 110 has an "L" shaped structure and is used to fix and connect the lifting and anti-fall mechanism 300.

[0073] Specifically, the lifting and fall protection mechanism 300 is connected to the upper oven 100 and the lower oven 200, the warning mechanism 600 is connected to the upper oven 100, the lifting and fall protection mechanism 300 and the distance measuring mechanism 500 are located on the larger side of the upper oven 100 and the lower oven 200 and the two sides are located on the same side, wherein the distance measuring mechanism 500 is located at the junction of the upper oven 100 and the lower oven 200.

[0074] The control mechanism 400 is used to process electrical signals. Specifically, the control mechanism 400 is the central hub for receiving, converting, and transmitting electrical signals. The control mechanism 400 is used to control the lifting and fall protection mechanism 300, the ranging mechanism 500, and the warning mechanism 600. The control mechanism 400 is located outside the upper oven 100 and the lower oven 200. Specifically, the control mechanism 400 is located next to the larger side of the lower oven 200 on the same side.

[0075] like Figure 3 As shown, the lifting and fall protection mechanism 300 includes a lifting assembly, a fall protection assembly, and a connecting assembly. The lifting assembly is the main component of the lifting and fall protection mechanism 300, mainly consisting of a lead screw assembly with a central section that moves along the axial direction and support arm assemblies on both sides that assist in the lifting motion. The lead screw assembly includes a lead screw 340, a main motor 350, a lifting plate 360, a support plate 391, and a load-bearing platform 392, as well as a connecting assembly for fixing and connecting the lead screw 340, the main motor 350, and the lifting plate 360.

[0076] The connecting assembly includes a lead screw nut 381, a first connector 382, ​​a second connector 383, and a bolt assembly for connecting the support arm assembly.

[0077] Specifically, the lead screw 340 is located in the middle as the main component of the lead screw assembly. The lead screw 340 is a vertical rod that can extend or retract along the axial direction. A lead screw nut 381 is sleeved on the top of the lead screw 340. A first connecting member 382 is provided above the lead screw nut 381. The top surface of the first connecting member 382 is connected to the lifting plate 360. The lifting plate 360 ​​is connected to the fixing member 110 at the bottom side of the upper oven 100.

[0078] Specifically, the lifting plate 360 ​​has a concave structure, the top of the lead screw 340 is placed in the concave cavity, the concave edge of the lifting plate 360 ​​is connected to the top surface of the first connecting member 382, ​​and the lifting and anti-fall mechanism 300 applies an upward force along the axial direction to the fixing member 110. After the fixing member 110 is subjected to force, it lifts the fixedly connected upper oven 100 upward along the axial direction. When the oven is in working condition, the height of the position of the lifting plate 360 ​​is equal to the height of the joint between the upper oven 100 and the lower oven 200.

[0079] Furthermore, a second connecting member 383 is sleeved at the bottom of the lead screw 340, and the bottom end of the lead screw 340 is connected to the main motor 350 and extends or retracts in the axial direction under the drive of the main motor 350; a support plate 391 is provided between the second connecting member 383 and the main motor 350, and the support plate 391 has a concave structure to play a stabilizing role, and the main motor 350 is set in the concave cavity of the support plate 391.

[0080] Specifically, the first connector 382 and the second connector 383 are cross-shaped connectors. The center of the cross-shaped connector is a circular threaded hole, and the side of the cross-shaped protrusion is provided with bolt holes for fixing the support arm assembly.

[0081] Furthermore, the support platform 392 is located below the support plate 391 and the main motor 350, which can disperse the force after the lifting and anti-fall mechanism 300 lifts the upper oven 100.

[0082] The support arm assembly includes a first support arm 371, a second support arm 372, a third support arm 373, and a fourth support arm 374 of equal length and identical shape. The support arm has a concave structure, with the concave cavity facing the lead screw 340 side and a round hole for connecting bolts at the end of the side wall. The first support arm 371, the second support arm 372, the third support arm 373, and the fourth support arm 374 are symmetrically distributed along the lead screw 340.

[0083] The width of the concave cavity of the second support arm 372 and the fourth support arm 374 is slightly larger than that of the first support arm 371 and the third support arm 373, so that the first support arm 371 can be placed into the concave cavity of the second support arm 372 and the third support arm 373 can be placed into the concave cavity of the fourth support arm 374.

[0084] The first support arm 371 is inserted into the concave cavity of the second support arm 372 and is bolted to the second support arm 372. The unconnected end of the first support arm 371 is bolted to the first connector 382, ​​and the unconnected end of the second support arm 372 is bolted to the second connector 383. Similarly, the third support arm 373 is inserted into the concave cavity of the fourth support arm 374 and is bolted to the fourth support arm 374. The unconnected end of the third support arm 373 is bolted to the first connector 382, ​​and the unconnected end of the fourth support arm 374 is bolted to the second connector 383.

[0085] The fall arrestor assembly includes a ratchet assembly, a locking hook assembly, and a micro motor assembly. The ratchet assembly includes a first ratchet 311 and a second ratchet 312. The first ratchet 311 is disposed in a concave cavity at the connection between the first support arm 371 and the second support arm 372, and the second ratchet 312 is disposed in a concave cavity at the connection between the third support arm 373 and the fourth support arm 374.

[0086] A ratchet is defined as a gear with rigid toothed or friction surfaces on its outer or inner edge, and is an important component of a ratchet mechanism. A ratchet is a mechanical structure that keeps linear reciprocating or rotary motion rotating in a single direction and prevents it from reversing, thus preventing the transmission mechanism from reversing.

[0087] A ratchet mechanism is a unidirectional intermittent motion mechanism consisting of a rocker arm, a pawl, and a ratchet wheel. The rocker arm is the motion input component, and the ratchet wheel is the motion output component. When the rocker arm swings clockwise, the pawl engages with the teeth of the ratchet wheel, and the ratchet wheel rotates at a certain angle. When the rocker arm swings counterclockwise, the pawl slides across the teeth of the ratchet wheel, and the ratchet wheel remains stationary. Thus, when the rocker arm swings continuously back and forth, the ratchet wheel rotates intermittently in one direction. Ratchet mechanisms are characterized by their simple structure, ease of manufacture, and reliable motion. Furthermore, the rotation angle of the ratchet wheel can be adjusted as needed. They are commonly used to achieve movements such as feeding, indexing or rotating, braking, and overrunning clutch engagement.

[0088] Ratchet mechanisms include toothed ratchet mechanisms, friction ratchet mechanisms, and overtaking ratchet mechanisms. Toothed ratchet mechanisms have rigid teeth on their outer or inner edges; the ratchet rotation angle can only be a multiple of the central angle between two adjacent teeth, and can only be adjusted in steps. Toothed ratchet mechanisms also include single-acting, double-acting, and variable-direction ratchet mechanisms. Friction ratchet mechanisms transmit motion through the friction between the pawl and the ratchet, achieving stepless intermittent motion. Overtaking ratchet mechanisms, besides being commonly used for intermittent motion, can also achieve overtaking motion, meaning the driven member can rotate beyond the driving member.

[0089] The locking hook assembly is a component used to further lock the ratchet assembly. The locking hook assembly is an "L"-shaped locking block. After the ratchet assembly is engaged, the ratchet assembly will not be able to rotate clockwise. The locking hook assembly includes a first locking hook 321 and a second locking hook 322. The first locking hook 321 is located on the first support arm 371 and near the first ratchet 311. The second locking hook 322 is located on the third support arm 373 and near the second ratchet 312.

[0090] The ratchet assembly and the locking hook assembly together form a ratchet mechanism. In particular, the first ratchet 311 and the first locking hook 321, and the second ratchet 312 and the second locking hook 322 together form a double-action ratchet mechanism.

[0091] Specifically, the micro motor assembly is the power source used to drive the locking hook assembly to lift and lock. The micro motor assembly includes a first auxiliary motor 331 and a second auxiliary motor 332. The first auxiliary motor 331 is disposed on the outer wall of the first support arm 371 corresponding to the first locking hook 321, and the second auxiliary motor 332 is disposed on the outer wall of the second support arm 372 corresponding to the second locking hook 322.

[0092] The double-action ratchet mechanism in this embodiment comprises two stages: a starting stage and a stopping stage. In the starting stage, the locking hook assembly is positioned between the ratchet teeth of the ratchet assembly. When an external force causes the ratchet assembly to rotate, the locking hook assembly rotates along with it without obstruction. When the ratchet assembly reaches a predetermined position, the locking hook assembly automatically engages with the ratchet teeth, preventing further rotation and entering the stopping stage. In the stopping stage, even with applied external force, the ratchet assembly will not rotate. To ensure the normal operation of the ratchet assembly, this embodiment uses a micro-motor assembly to drive the locking hook assembly. When the ratchet assembly is no longer needed to stop, the micro-motor assembly drives the locking hook assembly to lift or lower, allowing the ratchet assembly to regain its rotational capability.

[0093] The ratchet mechanism in this embodiment has good self-locking performance and can achieve a static state for a long time.

[0094] Specifically, when the upper oven 100 is lifted by the lead screw assembly, the support arm assembly is also stretched along with the extension of the lead screw 340. The included angle between the first support arm 371 and the second support arm 372, the third support arm 373 and the fourth support arm 374 gradually increases to an obtuse angle. The locking hook assembly rotates together with the ratchet assembly under the drive of the micro motor assembly. At this time, the ratchet assembly rotates clockwise and is not locked.

[0095] Specifically, before the upper oven 100 is about to descend, the locking hook assembly is lifted under the drive of the micro motor assembly. As the upper oven 100 and the lower oven 200 gradually close, the support arm assembly shortens as the lead screw 340 retracts. The included angle between the first support arm 371 and the second support arm 372, the third support arm 373 and the fourth support arm 374 gradually decreases. At this time, the ratchet assembly rotates clockwise without being locked.

[0096] Specifically, the micro motor assembly and the main motor 350 are turned on or off under the control of the control mechanism 400.

[0097] Specifically, the main motor 350 is selected from permanent magnet synchronous motors, reluctance synchronous motors, hysteresis synchronous motors, induction motors, AC commutator motors, permanent magnet DC motors, electromagnetic DC motors, brushless DC motors, induction motors, AC commutator motors, permanent magnet synchronous motors, reluctance synchronous motors, hysteresis synchronous motors, three-phase asynchronous motors, single-phase asynchronous motors, and shaded-pole asynchronous motors, but this patent is not limited to these.

[0098] Specifically, the micro motor assembly is selected from DC motors, AC motors, self-adjusting angle motors, stepper motors, rotary transformers, shaft angle encoders, AC / DC universal motors, tachogenerators, inductive synchros, linear motors, piezoelectric motors, motor units, and other special motors, but this patent is not limited to these.

[0099] The distance measuring mechanism 500 is activated after the upper oven 100 is raised. The distance measuring mechanism 500 measures the distance between the upper oven 100 and the lower oven 200 in real time and converts it into an electrical signal, which is then sent to the control mechanism 400. The distance measuring mechanism 500 includes a first distance measuring element 510 and a second distance measuring element 520. The first distance measuring element 510 is located at the bottom end of the side of the upper oven 100, and the second distance measuring element 520 is located at the top end of the side of the lower oven 200. The sides of the upper oven 100 and the lower oven 200 are located on the same side. In this embodiment, the first distance measuring element 510 and the second distance measuring element 520 are located on the left side of the sides of the upper oven 100 and the lower oven 200, along the corners.

[0100] Specifically, when the oven is in operation, the first measuring element 510 and the second measuring element 520 are in contact; when the oven is in inspection mode, the first measuring element 510 and the second measuring element 520 are separated. At this time, the measuring mechanism 500 starts and measures the distance between the upper oven 100 and the lower oven 200 in real time. The measuring mechanism 500 converts the measured distance into an electrical signal and sends it to the control mechanism 400. Specifically, the measuring mechanism 500 can be a laser displacement sensor.

[0101] The alarm mechanism 600 is powered by a separate backup power supply and can be an alarm light. The alarm mechanism 600 is connected to an independent power supply and is installed on the top of the upper oven 100. The alarm mechanism 600 will issue an alarm after receiving an electrical signal from the control box.

[0102] The control mechanism 400 is used to receive, convert, and transmit electrical signals. The control mechanism 400 is located outside the upper oven 100 and the lower oven 200. The control mechanism 400 contains a main power supply and two independent backup power supplies. The alarm mechanism 600 is used for the independent backup power supply.

[0103] Specifically, in this embodiment, the oven can be divided into the following operating states:

[0104] A1: Working status;

[0105] When the oven is in operation, it performs the normal baking process on the reconstituted tobacco leaves. The upper oven 100 and the lower oven 200 are closed as a whole, and the lifting and anti-fall mechanism 300, the ranging mechanism 500 and the warning mechanism 600 do not need to work.

[0106] A2: Switching from working status to inspection status;

[0107] After receiving the electrical signal from the control mechanism 400, the lifting and anti-fall mechanism 300 lifts, the lead screw 340 extends, and the included angle between the first support arm 371 and the second support arm 372, the third support arm 373 and the fourth support arm 374 gradually increases to an obtuse angle. The locking hook assembly rotates together with the ratchet assembly under the drive of the micro-motor assembly. At this time, the ratchet assembly rotates clockwise and is not locked.

[0108] A3: Check status;

[0109] When the oven is in inspection mode, the locking hook assembly, driven by the micro-motor assembly, engages with the ratchet teeth of the ratchet assembly, separating the upper oven 100 and the lower oven 200 into two parts. The lifting and anti-fall mechanism 300 and the distance measuring mechanism 500 operate continuously, while the alarm mechanism 600 is ready to operate. The upper oven 100 and the lower oven 200 are supported by the lifting and anti-fall mechanism 300, facilitating maintenance personnel to perform maintenance and inspection work inside the oven. The distance measuring mechanism 500 measures the distance in real time and converts it into an electrical signal, which is then sent to the control mechanism 400. If the measured distance changes, the control mechanism 400 sends an electrical signal to the alarm mechanism 600.

[0110] A4: Transition from inspection status to working status;

[0111] When the oven reaches step A4, before the upper oven 100 is about to descend, the locking hook assembly is lifted by the micro motor assembly. As the upper oven 100 and the lower oven 200 gradually close, the support arm assembly shortens as the lead screw retracts. The angle between the first support arm 371 and the second support arm 372, the third support arm 373 and the fourth support arm 374 gradually decreases. At this time, the ratchet assembly rotates clockwise and is not locked. The upper oven 100 descends until it closes with the lower oven 200.

[0112] This patent specification uses directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom" to describe various example structural parts and components of this patent. However, the use of these terms is merely for illustrative purposes and is based on the orientation of the examples shown in the accompanying drawings. Since the embodiments disclosed in this patent can be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or the same as the direction of gravity.

[0113] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this patent will not describe the various possible combinations separately.

[0114] Furthermore, various implementations of this patent can be combined in any way, as long as they do not violate the spirit of this patent, they should also be regarded as the content disclosed in this patent.

Claims

1. A reconstituted tobacco drying oven with anti-fall function, the reconstituted tobacco drying oven comprising: An upper drying oven, a lower drying oven, and a lifting and anti-fall mechanism, characterized in that the lifting and anti-fall mechanism includes a ratchet mechanism, a support arm assembly, and a lead screw assembly, wherein the ratchet mechanism is disposed between the support arm assemblies; The lifting and anti-fall mechanism includes a lifting function and an anti-fall function. When the reconstituted tobacco drying oven is in the inspection state, the upper drying oven is lifted by the screw assembly and moved away from the lower drying oven. The ratchet mechanism rotates normally between the support arm assembly. After the upper drying oven is lifted, the ratchet mechanism enters the self-locking anti-fall state.

2. The reconstituted tobacco drying oven according to claim 1, characterized in that, The ratchet mechanism includes a ratchet assembly, a locking hook assembly, and a micro motor assembly. The ratchet mechanism is a one-way motion mechanism. The locking hook assembly engages with the ratchet assembly under the drive of the micro motor assembly; or the locking hook assembly rotates together with the ratchet assembly under the drive of the micro motor assembly.

3. The reconstituted tobacco drying oven according to claim 2, characterized in that, The ratchet assembly includes a first ratchet and a second ratchet; the locking hook assembly includes a first locking hook and a second locking hook; the micro-motor assembly includes a first auxiliary motor and a second auxiliary motor.

4. The reconstituted tobacco drying oven according to claim 1, characterized in that, The lead screw assembly includes a lead screw and a main motor, and the lead screw can extend or retract in the axial direction under the drive of the main motor; The upper oven includes a fixing component for connecting the lifting and anti-fall mechanism.

5. The reconstituted tobacco drying oven according to claim 4, characterized in that, The support arm assembly extends when the lead screw assembly extends; Or the support arm assembly retracts when the lead screw assembly retracts; The support arm assembly includes a first support arm, a second support arm, a third support arm, and a fourth support arm.

6. The reconstituted tobacco drying oven according to claim 1, characterized in that, The lifting and fall prevention mechanism further includes a lifting plate, a connecting assembly, a support plate, and a load-bearing platform; the lifting plate is disposed at the top of the lifting and fall prevention mechanism and is used to connect the upper oven; the connecting assembly is disposed on the lead screw assembly; the support plate and the load-bearing platform are disposed at the bottom of the lifting and fall prevention mechanism and are used to stabilize the lifting and fall prevention mechanism; the connecting assembly includes a lead screw nut, a first connecting member, and a second connecting member.

7. The reconstituted tobacco drying oven according to claim 1, characterized in that, The reconstituted tobacco drying oven also includes a control mechanism, which is used to receive electrical signals, convert electrical signals, and send electrical signals. The control mechanism is arranged adjacent to the lower drying oven.

8. The reconstituted tobacco drying oven according to claim 7, characterized in that, The reconstituted tobacco drying oven also includes an alarm mechanism, which is connected to an independent power supply and is located on the top of the upper drying oven. The alarm mechanism issues an alarm after receiving an electrical signal from the control mechanism.

9. The reconstituted tobacco drying oven according to claim 1, characterized in that, The reconstituted tobacco drying oven also includes a distance measuring mechanism, which is activated after the upper drying oven is raised. The distance measuring mechanism is used to measure the distance between the upper drying oven and the lower drying oven in real time.

10. The reconstituted tobacco drying oven according to claim 9, characterized in that, The ranging mechanism includes a first ranging element and a second ranging element. The first ranging element is disposed at the bottom end of the side of the upper oven, and the second ranging element is disposed at the top end of the side of the lower oven. The side of the upper oven and the side of the lower oven are disposed on the same side.

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