Tobacco leaf liquid nitrogen cooling and grinding device

Abstract

The invention relates to the technical field of grinding, in particular to a tobacco liquid nitrogen cooling and grinding device which comprises a machine body, and a grinding mechanism and a motor are arranged in the machine body; and the grinding mechanism comprises a transmission assembly, a connecting rod, a rotating rod and a grinding rod, through the arrangement of the grinding mechanism, when the tobacco leaves are ground, the tobacco leaves can be automatically, fully and effectively ground, manpower consumption is reduced, the grinding efficiency is high, and the continuity is high. Through the guiding of the rotary rod to the connecting rod and the hinged connection relation between the grinding rod and the connecting rod, in the circumferential grinding process, downward abutting pressing force and outward overturning pushing force after the grinding rod is subjected to abutting force can be applied at the same time, on one hand, the grinding effect can be further improved through the combination of multiple forces, and on the other hand, the grinding efficiency is improved; and on the other hand, the grinding area can be expanded through the overturning change of the grinding rod, and the situation that tobacco leaves in part of the area cannot be sufficiently and effectively ground is avoided.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and more particularly to a liquid nitrogen-cooled grinding device for tobacco leaves. Background Technology

[0002] Liquid nitrogen grinding is a technique that uses liquid nitrogen to break down biological samples at low temperatures. By using a -196°C environment to make the sample tissue brittle and inhibit enzyme activity, it can achieve efficient separation of biological macromolecules such as DNA and RNA and prevent degradation. In the study of heterologous synthesis of taxadiene in tobacco, a single experiment requires grinding at least 1-2 kg of frozen tobacco leaf samples into powder using liquid nitrogen grinding.

[0003] Conventional liquid nitrogen grinding is usually done manually, but this method can only meet the needs of small sample volumes. Manual grinding is inefficient, difficult to operate, and also has certain dangers. Therefore, machine grinding is generally used now, such as grinding by hammering with a vibrating motor or grinding by rotating in a circular motion driven by a motor.

[0004] However, the above grinding methods have a limited grinding area, which can lead to dead zones in some areas and result in poor grinding and powdering effects. Summary of the Invention

[0005] The purpose of this invention is to provide a liquid nitrogen-cooled grinding device for tobacco leaves, which solves the problems of insufficient grinding and poor results in the prior art.

[0006] The present invention solves the above-mentioned technical problems through the following technical means:

[0007] A liquid nitrogen-cooled grinding device for tobacco leaves includes: a body, wherein a grinding mechanism and a motor are disposed within the body;

[0008] The grinding mechanism includes a transmission assembly, a connecting rod, a rotating rod, and a grinding rod. The transmission assembly is located inside the machine body and is connected to the motor for transmission. The connecting rod is connected to the transmission assembly for transmission. The rotating rod is fixed inside the machine body and is coaxially sleeved with one end of the connecting rod. The grinding rod is hinged to the free end of the connecting rod. A torsion member is provided at the hinge axis of the grinding rod and the connecting rod, and the torsion member tilts the axis of the grinding rod to the axis of the connecting rod in a static state. A limiting member is also provided between the connecting rod and the grinding rod, and the limiting member restricts the axis of the grinding rod from exceeding 90° in the flipping trajectory.

[0009] When the connecting rod rotates, the slewing rod can cause the connecting rod to move along the axis of the connecting rod.

[0010] This structure allows for a more thorough and effective grinding of the tobacco leaves in the grinding bowl through circumferential grinding, contact grinding, and cyclically increasing or decreasing the submersion range of the grinding rods.

[0011] The transmission assembly includes a drive wheel, a drive belt, and a driven wheel. The drive wheel is coaxially connected to the output shaft of the motor. A guide rib is provided between the driven wheel and the connecting rod. The driven wheel and the connecting rod are coaxially connected, and the connecting rod and the driven wheel are slidably connected along the axis. The drive belt is wound around the drive wheel and the driven wheel.

[0012] This structure can stably output rotational power to drive the grinding device. It is simple and reasonable in structure and easy to maintain later.

[0013] The rotating rod has a guide groove on its side that connects head to tail. The guide groove has a wavy line structure when unfolded in plane. The connecting rod is equipped with a transmission head that is slidably embedded in the guide groove.

[0014] This structure allows the connecting rod to rotate circumferentially while simultaneously being guided by the transmission head and the guide groove, enabling the connecting rod to perform cyclic lifting and pressing actions. This further improves the grinding effect and automatically adjusts the grinding area of ​​the grinding rod.

[0015] The connecting rod includes an upper section and a lower section, with a buffer provided between the upper and lower sections, and the upper and lower sections are slidably connected in the axial direction.

[0016] The buffer includes a slider and an elastic element. The upper section has a stepped cavity. The slider is slidably disposed in the stepped cavity. The elastic element is disposed in the stepped cavity and connected to the slider to keep the lower section moving downward.

[0017] This structure can act as a buffer for the components, preventing them from becoming locked and malfunctioning in certain situations, such as when there is too much tobacco or when the grinding rod gets stuck during the flipping process.

[0018] A locking component is also provided between the grinding rod and the upper section to lock the angle of the grinding rod during a single lifting and lowering movement of the connecting rod.

[0019] The locking assembly includes a connecting rod, a slider, a one-way limiting member, and a synchronizing ring. One end of the connecting rod is slidably hinged to the side of the grinding head, and the sliding direction is parallel to the axis of the grinding head. The slider is fixedly mounted on the connecting rod, and an abutment is elastically slidably mounted on its side. The one-way limiting member is connected to the upper section and slidably abuts against the abutment. The one-way limiting member ensures that the slider can only move in one direction from bottom to top until the slider reaches the upper end of the one-way limiting member, at which point the restriction is lifted. The synchronizing ring is rotatably mounted on the upper side of the machine body and slidably connected to the free end of the connecting rod.

[0020] This structure allows for gradual adjustment of the grinding rod's tilt angle during the connecting rod's extension and retraction cycle, while maintaining a fixed angle within a single extension stroke, thereby achieving a more thorough grinding effect.

[0021] The one-way limiting component includes a base plate, lifting teeth, and a reset plate. The base plate is fixedly connected to the upper section and its length direction is parallel to the axis direction of the upper end. There are several lifting teeth, which are evenly distributed along the length direction of the base plate. The lifting teeth restrict the downward movement of the slider but do not affect the upward movement of the slider. The upper end of the base plate is an inclined surface that slopes from top to bottom toward the connecting rod. The reset plate is hinged to the lower end of the base plate. A torsion spring is provided on the hinge shaft between the reset plate and the base plate. In the static state, the reset plate is rotated toward the side closer to the connecting rod by the action of the torsion spring until the first direction of the reset plate is parallel to the lifting surface of the lifting teeth.

[0022] This structure allows for the stable fixing and lifting of the connecting rod via the lifting teeth, thereby gradually and steadily adjusting the tilt of the grinding rod before automatically resetting.

[0023] The lower side of the machine body is also provided with a lifting assembly, which includes a telescopic device and a tray. The telescopic device is fixedly connected to the lower side of the machine body, and the output shaft axis coincides with the connecting rod axis. The tray is connected to the output shaft of the telescopic device.

[0024] This structure allows for easier loading and unloading of the grinding bowl, and manual adjustment of the position between the grinding bowl and the grinding rod according to the grinding state. The tray can stably fix the grinding bowl in place.

[0025] The tray has a dividing ring on the lower side and a grinding bowl inside the tray (71). The outer diameter of the dividing ring is smaller than the outer surface diameter of the grinding bowl.

[0026] This structure allows for the filling of insulating material between the tray and the grinding bowl to further meet the grinding needs at low temperatures.

[0027] The beneficial effects of this invention are:

[0028] By setting up a grinding mechanism, the tobacco leaves can be automatically and effectively ground, reducing labor costs and achieving high grinding efficiency and continuity.

[0029] By guiding the connecting rod with the rotating rod, and through the hinged connection between the grinding rod and the connecting rod, a downward pressing force and an outward flipping force can be applied simultaneously during the circumferential grinding process. On the one hand, the combination of multiple forces can further improve the grinding effect; on the other hand, the grinding area can be expanded by the flipping and changing of the grinding rod, reducing the amount of tobacco leaves in some areas that cannot be fully and effectively ground.

[0030] The buffer can prevent parts from jamming during grinding, which could lead to device malfunction. In conjunction with the locking component, the tilt angle of the grinding rod can be adjusted and locked during a single lifting and lowering operation of the upper section, thus enabling more thorough and effective grinding of the tobacco leaves. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall external structure of a tobacco leaf liquid nitrogen cooling and grinding device according to the present invention;

[0032] Figure 2 This is a cross-sectional view of the structure of the tobacco leaf liquid nitrogen cooling and grinding device of the present invention after the machine body has been cut open;

[0033] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0034] Figure 4 This is a cross-sectional view of the upper section of the tobacco leaf liquid nitrogen cooling and grinding device of the present invention;

[0035] Figure 5 yes Figure 4 Enlarged structural diagram at point B:

[0036] Figure 6 This is a cross-sectional view of the overall structure of a tobacco leaf liquid nitrogen cooling and grinding device according to the present invention;

[0037] in,

[0038] Body 1, Motor 11;

[0039] Connecting rod 2, upper section 201, lower section 202, rotating rod 21, grinding rod 22, guide groove 23, transmission head 24;

[0040] slider 3, elastic element 31, stepped cavity 32;

[0041] Connecting rod 4, slide head 41, abutment joint 42, synchronizing ring 43;

[0042] Base plate 5, lifting teeth 51, reset plate 52;

[0043] Drive wheel 6, drive belt 61, driven wheel 62;

[0044] Telescopic device 7, tray 71, separator ring 72. Detailed Implementation

[0045] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product size; it is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the figures.

[0046] In the figures of this invention, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this invention 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. Therefore, the terms used to describe positional relationships in the figures are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0047] like Figure 1-5 As shown, a liquid nitrogen cooling and grinding device for tobacco leaves according to the present invention includes: a body 1, and a grinding mechanism and a motor 11 are provided inside the body 1;

[0048] The grinding mechanism includes a transmission component, a connecting rod 2, a rotating rod 21, and a grinding rod 22. The transmission component is located inside the machine body 1 and is connected to the motor 11 for transmission. The connecting rod 2 is connected to the transmission component for transmission. The rotating rod 21 is fixed inside the machine body 1 and is coaxially sleeved with one end of the connecting rod 2. The grinding rod 22 is hinged to the free end of the connecting rod 2. A torsion member is provided at the hinge axis of the grinding rod 22 and the connecting rod 2. In the static state, the torsion member makes the axis of the grinding rod 22 inclined to the axis of the connecting rod 2. A limiting member is also provided between the connecting rod and the grinding rod. The limiting member restricts the axis of the grinding rod 22 from exceeding 90° in the flipping trajectory. In fact, the maximum flipping angle of the grinding rod 22 is 30°-45°. This can prevent the grinding rod 22 from over-flipping and causing it to come into contact with the grinding bowl or flip out of the grinding bowl.

[0049] When the connecting rod 2 rotates, the slewing rod 21 can make the connecting rod 2 move along the axis of the connecting rod 2.

[0050] When preparing tobacco powder, the freeze-dried tobacco leaves are pre-cut into granules or powder. Then, the grinding bowl is sterilized and pre-cooled. After preparation, the tobacco leaves to be ground can be loaded into the grinding bowl and placed below the grinding mechanism. At the same time, the grinding rod 22 is inserted into the grinding bowl.

[0051] During grinding, the valve of the storage bottle is opened, or liquid nitrogen is poured into the grinding bowl manually or automatically through other containers storing liquid nitrogen. At the same time, the motor 11 is turned on to perform the grinding process. When the motor 11 starts, its output shaft outputs rotational power, which drives the connecting rod 2 to rotate through the transmission component. This causes the grinding rod 22 connected to the connecting rod 2 to rotate and grind. Under the driving action of the rotating rod 21, the connecting rod 2 will simultaneously generate a cyclic extension and retraction motion along its own axis while rotating in a circle. That is, the grinding rod 22 will also move up and down while rotating. Since the grinding rod 22 will be blocked by the grinding bowl and tobacco leaves when it descends, and the grinding rod 22 itself is hinged to the connecting rod 2, it will flip when it is blocked. In this way, the circumferential rotation trajectory of the grinding rod 22 will have an outward expansion trend in the plane, that is, expand the grinding range of the grinding rod 22 itself in the grinding bowl. This can effectively improve the grinding effect and efficiency.

[0052] As the connecting rod 2 rises, the grinding rod 22 is reset by the torsion component, and the downward pressure on the grinding rod 22 decreases due to the increase in height. At this time, the grinding rod 22 will gradually flip and move towards the side closer to the axis of the connecting rod 2 until it is reset. This allows it to continue to cooperate with the next rotating rod 21 in driving the connecting rod 2. Since the axis of the grinding rod 22 is deviated from the axis of the connecting rod 2 in the static state, the grinding rod 22 can continue to flip relatively smoothly in the next driving stroke. In this way, the grinding rod 22 will gradually flip outward while moving in a circular motion, and finally flip inward to reset, thus achieving an effective grinding effect. This is more efficient and safer than manual grinding, and has higher efficiency and effect than general hammer grinding, with a larger grinding range.

[0053] It is worth noting that in this embodiment, the torsion member is a torsion spring. For those skilled in the art, other devices such as clock springs or other devices with torsional force can also be used to apply rotational force to the hinge shaft between the grinding rod 22 and the connecting rod 2.

[0054] The grinding end of the grinding rod 22 has a ball-head structure that matches the curvature of the inner wall of the grinding bowl, which improves the smoothness of the grinding rod 22 during grinding and tumbling.

[0055] The transmission assembly includes a drive wheel 6, a drive belt 61, and a driven wheel 62. The drive wheel 6 is coaxially connected to the output shaft of the motor 11. A guide rib is provided between the driven wheel 62 and the connecting rod 2. The driven wheel 62 and the connecting rod 2 are coaxially connected, and the connecting rod 2 and the driven wheel 62 are slidably connected along the axis. The drive belt 61 is wound around the drive wheel 6 and the driven wheel 62.

[0056] In this embodiment, the output shaft of the motor 11 is coaxially connected to the drive wheel 6. When the drive wheel 6 rotates, it will simultaneously drive the driven wheel 62 to rotate through the drive belt 61. The driven wheel 62 is rotatably connected to the machine body 1 through the bracket. A guide rib is provided between the driven wheel 62 and the connecting rod 2, so that the connecting rod 2 can only slide along the guide rib. Therefore, under the combined action of the rotating rod 21 and the driven wheel 62, the entire connecting rod 2 will also produce up-and-down cyclic lifting action while rotating in a circle, thereby achieving the effect of efficient grinding. In this embodiment, both the drive wheel 6 and the driven wheel 62 are pulleys, and the drive belt 61 is a transmission belt.

[0057] In other embodiments, the transmission component can also be driven directly by gear meshing, or it can be driven by a belt and transmission gears.

[0058] The rotating rod 21 has a guide groove 23 connected end to end on its side. The guide groove 23 has a wavy line structure when the groove plane is unfolded. The connecting rod 2 is provided with a transmission head 24 that is slidably embedded in the guide groove 23.

[0059] In this embodiment, the guide groove 23 is used to guide the transmission head 24. When the wavy structure of the guide groove 23 is opened to the circumferential curved surface of the rotating rod 21, at least one peak and trough will be formed. Since the connecting rod 2 itself is connected to the transmission component, the connecting rod 2 itself can rotate. When the connecting rod 2 rotates, the transmission head 24 provided on the connecting rod 2 slides in the guide groove 23, which can generate a driving effect of lifting and lowering the connecting rod 2, thereby achieving the effect of pressing down the grinding force and applying force during grinding.

[0060] In other embodiments, the guide groove 23 may have multiple crests.

[0061] The connecting rod 2 includes an upper section 201 and a lower section 202. A buffer is provided between the upper section 201 and the lower section 202, and the upper section 201 and the lower section 202 are slidably connected in the axial direction.

[0062] The buffer includes a slider 3 and an elastic element 31. The upper section 201 has a stepped cavity 32. The slider 3 is slidably disposed in the stepped cavity 32. The elastic element 31 is disposed in the stepped cavity 32 and connected to the slider 3 to keep the lower section 202 moving downward.

[0063] In this embodiment, when the connecting rod 2 moves downward as a whole, in order to avoid the grinding rod 22 directly generating excessive contact force with the grinding bowl, which could lead to damage or jamming of the components, the upper section 201 of the connecting rod 2 drives the lower section 202 to move downward and when the lower section 202 comes into contact with the grinding bowl, the lower section 202 will be blocked and generate an upward thrust, thereby causing the lower section 202 to move upward and abut against the elastic element 31 through the slider 3, thereby generating an upward stroke buffer. This can improve the fit between the components and avoid damage or jamming between the components.

[0064] In this embodiment, the elastic element 31 of the buffer is a spring. In other embodiments, a sheet spring can also be used, or even a hydraulic buffer can be used to meet the buffering requirements.

[0065] It is worth noting that in this embodiment, the minimum compressive reaction force of the elastic element 31 is less than the minimum torsional force of the torsion element. This allows the grinding rod 22 to gradually flip during the compression process of the elastic element 31, improving smoothness and stability. Of course, in other embodiments, the minimum torsional force of the torsion element can also be greater than the maximum compressive reaction force of the elastic element 31 after compression. That is, after the buffer is fully buffered, the grinding rod 22 is subjected to a downward abutment force and flips. In fact, the maximum torsional force of the torsion element can also be less than the minimum compressive reaction force of the elastic element 31, so that the grinding rod 22 can be flipped to the maximum angle and then form a buffered expansion and contraction effect.

[0066] A locking component is also provided between the grinding rod 22 and the upper section 201 to lock the angle of the grinding rod during a single lifting and lowering movement of the connecting rod.

[0067] The locking assembly includes a connecting rod 4, a slider 41, a one-way limiting member, and a synchronizing ring 43. One end of the connecting rod 4 is slidably hinged to the side of the grinding head, and the sliding direction is parallel to the axis of the grinding head. The slider 41 is fixedly mounted on the connecting rod 4, and the side is elastically slidably provided with an abutment 42. The abutment 42 moves toward the connecting rod 2 in a static state. The one-way limiting member is connected to the upper section 201 and slides against the abutment 42. The one-way limiting member ensures that the slider 41 can only move in one direction from bottom to top until the slider 41 reaches the upper end of the one-way limiting member and then the restriction is lifted. The synchronizing ring 43 is rotatably mounted on the upper side inside the machine body 1 and is slidably connected to the free end of the connecting rod 4.

[0068] In this embodiment, the two ends of the connecting rod 4 are connected to the grinding head and the synchronizing ring 43 respectively. The synchronizing ring 43 is located at a fixed height position inside the body 1. Therefore, when the entire connecting rod 2 rotates in a circle, the grinding rod 22 will drive the synchronizing ring 43 to rotate synchronously through the connecting rod 4. In fact, the synchronizing ring 43 can also be sleeved with the connecting rod 2, and the synchronizing ring 43 can be subjected to rotational power through the guide rib to improve the stability of the connection.

[0069] Among them, when the locking component is set, the minimum torsional force of the torsion member is greater than the maximum compression reaction force of the elastic member 31 after compression, and the downward driving stroke of the rotating rod 21 on the connecting rod 2 does not generate abutment and overturning drive for the grinding rod 22, that is, the elastic member 31 will not continue to move downward after reaching the maximum compression stroke.

[0070] When the upper section 201 of the connecting rod 2 moves downward, the lower section 202 and the grinding rod 22 remain stationary due to the contact with the grinding bowl. The one-way limiting member connected to the upper section 201 moves downward synchronously. At this time, the elastic member 31 is compressed, and the one-way limiting member moves downward relative to the contact 42 until the upper section 201 reaches its maximum downward stroke and then resets. During the reset process, since the contact 42 of the sliding head 41 on the connecting rod 4 is pulled by the one-way limiting member, when the upper section 201 moves upward and resets, it will pull the grinding head upward through the connecting rod 4, causing the grinding head to flip upward. The corresponding elastic member 31 is depressurized during the reset process of the upper section 201 and pushes the lower section 202 and the grinding head downward as a whole. At this time, the sliding connection height between the connecting rod 4 and the grinding rod 22 is relatively fixed. Therefore, the grinding head will further flip outward for a stroke matching the reset of the elastic member 31, or remain in a relatively fixed position.

[0071] After multiple extension and retraction movements of the upper section 201, the position of the slide head 41 is raised, that is, the connecting rod 4 moves upward and pulls the grinding head to rotate upward until the abutment 42 is guided to the uppermost end of the one-way limiter. Then, through the elastic connection of the abutment 42 on the slide head 41, the abutment 42 is disengaged from the one-way limiter and reset. This releases the traction of the connecting rod 4 on the grinding rod 22. Finally, the grinding rod 22 is reset by the resetting drive of the torsion member, thus forming a cycle. This can effectively improve the grinding effect of tobacco leaves, and simulate the action of grinding from the center of the grinding bowl outward to the greatest extent as in manual grinding, effectively expanding the grinding range and effect, and forming a cycle.

[0072] The lower end face of the existing grinding bowl is an arc structure, that is, the height of the bottom of the bowl gradually increases from the center of the grinding bowl to the edge of the grinding bowl. Therefore, when the grinding rod 22 is gradually flipped, the position of contact with the bottom of the grinding bowl also gradually increases. In this way, after the grinding rod 22 is flipped, the contact force between it and the grinding bowl remains basically unchanged, and there will be no excessive stroke change that would cause the grinding rod 22 to detach from the contact with the grinding bowl.

[0073] In this embodiment, the elastic sliding connection between the abutment 42 and the slider 41 can be achieved by using a spring to reset the abutment 42, that is, to keep the abutment 42 in its static position. In other embodiments, a spring-like mechanism can also be used for sliding reset.

[0074] The grinding head has a groove on its side, and a slider slides inside the groove. The slider is hinged to the connecting rod, which can provide a stable connection and meet the stroke requirements of the connecting rod's lifting and lowering and the grinding rod's flipping. In order to prevent the powder and debris generated during grinding from entering the groove and affecting the normal operation of the components, a corrugated protective cover is provided in the opening of the groove. In fact, the opening can also be covered by a rubber sleeve. The groove can also be a guide rail.

[0075] The one-way limiting component includes a base plate 5, lifting teeth 51, and a reset plate 52. The base plate 5 is fixedly connected to the upper section 201 and its length direction is parallel to the axis direction of the upper end. There are several lifting teeth 51, which are evenly distributed along the length direction of the base plate 5. The lifting teeth 51 restrict the downward movement of the slider 41 but do not affect the upward movement of the slider 41. The upper end of the base plate 5 is an inclined surface that slopes from top to bottom toward the connecting rod 2. The reset plate 52 is hinged to the lower end of the base plate 5. A torsion spring is provided on the hinge shaft between the reset plate 52 and the base plate 5. In the static state, the reset plate 52 is flipped toward the side closer to the connecting rod 2 by the action of the torsion spring until the first direction of the reset plate 52 is parallel to the lifting surface of the lifting teeth 51.

[0076] In this embodiment, the base plate 5 is used for connecting the entire limiting member and mounting the components, while the lifting tooth 51 is used to cooperate with the abutment 42 to guide the abutment 42 upward and abut it downward. In this embodiment, the vertical cross-section of the lifting tooth 51 is a right-angled triangle structure, and the non-right-angled inclined surface of the lifting tooth 51 faces downward, which can meet the needs of lifting and limiting the abutment 42. In other embodiments, the lifting tooth 51 can also be an obtuse-angled triangle structure, with the obtuse angle located on the upper side, which can also serve the purpose of guiding and limiting.

[0077] When the abutment 42 moves to the uppermost end of the base plate 5, guided by the upper inclined surface of the base plate 5 and the elastic sliding reset of the abutment 42 itself, the abutment 42 will disengage from the obstruction of the lifting tooth 51 and then move to the rear side of the base plate 5. Subsequently, through the rotation and reset of the grinding head, the entire connecting rod 4 moves down, causing the abutment 42 to move down and push the reset plate 52 until it passes over the reset plate 52, thus satisfying the next grinding cycle process.

[0078] The lower side of the body 1 is also provided with a lifting assembly, which includes a telescopic device 7 and a tray 71. The telescopic device 7 is fixedly connected to the lower side of the body, and the output shaft axis coincides with the axis of the connecting rod 2. The tray 71 is connected to the output shaft of the telescopic device 7.

[0079] In this embodiment, the telescopic device 7 is used to raise and lower the control tray 71, thereby facilitating the placement of the grinding bowl and adjusting it according to the amount of tobacco leaves put in, so as to achieve the best processing state and meet the loading and unloading needs of the grinding bowl.

[0080] In this embodiment, the telescopic device 7 is an electrically controlled hydraulic cylinder. In other embodiments, it may also be an electrically controlled telescopic rod. Furthermore, to facilitate the use of the electrical control device in this application, it is also possible to open and close, adjust the running time, or control the motor 11 and the telescopic device 7 by setting up a control panel, a computer, or other devices with control capabilities.

[0081] A separator ring 72 is provided on the lower side of the tray 71, and a grinding bowl is provided inside the tray 71. The outer diameter of the separator ring 72 is smaller than the outer surface diameter of the grinding bowl.

[0082] In this embodiment, the partition ring 72 can form a gap between the tray 71 and the grinding bowl. During the grinding process, heat-insulating materials such as dry ice can be added into the gap to provide external heat insulation for the grinding bowl while preventing the heat-insulating material from entering the grinding bowl.

[0083] The working principle of this invention is as follows:

[0084] Before grinding the tobacco leaves, an appropriate amount of tobacco leaves are placed into the grinding bowl. Then, the grinding bowl is placed under the grinding mechanism and aligned with the grinding rod 22. An appropriate amount of liquid nitrogen is injected. Next, the motor 11 is turned on, and the motor 11 drives the connecting rod 2 through the transmission component. Under the action of the rotating rod 21, the connecting rod 2 will perform circumferential grinding and pressing grinding on the tobacco leaves in the grinding bowl through the grinding rod 22. The grinding rod 22 will move outward from the center of the grinding bowl until the tobacco leaves are ground into powder.

[0085] The locking component automatically adjusts the tilt angle of the grinding rod 22 each time the connecting rod 2 is pressed down, so that the diameter of the grinding circumference trajectory of the grinding rod 22 gradually increases during the circular motion. In the peak-trough stroke cycle of a single guide groove 23, the adjusted tilt state of the grinding rod 22 is maintained to ensure that the grinding needs can be fully met.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A liquid nitrogen-cooled grinding apparatus for tobacco leaves, comprising: The body (1) is characterized in that: a grinding mechanism and a motor (11) are provided inside the body (1); The grinding mechanism includes a transmission assembly, a connecting rod (2), a rotating rod (21), and a grinding rod (22). The transmission assembly is located inside the machine body (1) and is connected to the motor (11) for transmission. The connecting rod (2) is connected to the transmission assembly for transmission. The rotating rod (21) is fixed inside the machine body (1) and is coaxially sleeved with one end of the connecting rod (2). The grinding rod (22) is hinged to the free end of the connecting rod (2). A torsion member is provided at the hinge axis of the grinding rod (22) and the connecting rod (2), and the torsion member tilts the axis of the grinding rod (22) to the axis of the connecting rod (2) in a static state. A limiting member is also provided between the connecting rod and the grinding rod. The limiting member restricts the axis of the grinding rod (22) from exceeding 90° in the flipping trajectory. When the connecting rod (2) rotates, the slewing rod (21) can make the connecting rod (2) move along the axis of the connecting rod (2).

2. The tobacco leaf liquid nitrogen cooling and grinding device according to claim 1, characterized in that: The transmission assembly includes a drive wheel (6), a drive belt (61), and a driven wheel (62). The drive wheel (6) is coaxially connected to the output shaft of the motor (11). A guide rib is provided between the driven wheel (62) and the connecting rod (2). The driven wheel (62) and the connecting rod (2) are coaxially connected, and the connecting rod (2) and the driven wheel (62) are slidably connected along the axis. The drive belt (61) is wound around the drive wheel (6) and the driven wheel (62).

3. The tobacco leaf liquid nitrogen cooling and grinding device according to claim 1, characterized in that: The rotating rod (21) has a guide groove (23) with the head and tail connected. The guide groove (23) has a wavy line structure when the groove plane is unfolded. The connecting rod (2) is provided with a transmission head (24) that is slidably embedded in the guide groove (23).

4. The tobacco leaf liquid nitrogen cooling and grinding device according to claim 1, characterized in that: The connecting rod (2) includes an upper section (201) and a lower section (202), a buffer is provided between the upper section (201) and the lower section (202), and the upper section (201) and the lower section (202) are slidably connected in the axial direction.

5. The tobacco leaf liquid nitrogen cooling and grinding device according to claim 4, characterized in that: The buffer includes a slider (3) and an elastic element (31). The upper section (201) has a stepped cavity (32). The slider (3) is slidably disposed in the stepped cavity (32). The elastic element (31) is disposed in the stepped cavity (32) and connected to the slider (3) to keep the lower section (202) moving downward.

6. The tobacco leaf liquid nitrogen cooling and grinding device according to claim 4, characterized in that: A locking component is also provided between the grinding rod (22) and the upper section (201) to lock the angle of the grinding rod during a single lifting and lowering movement of the connecting rod.

7. The tobacco leaf liquid nitrogen cooling and grinding apparatus according to claim 6, characterized in that: The locking assembly includes a connecting rod (4), a slider (41), a one-way limiting member, and a synchronizing ring (43). One end of the connecting rod (4) is slidably hinged to the side of the grinding head, and the sliding direction is parallel to the axis of the grinding head. The slider (41) is fixedly mounted on the connecting rod (4), and the side is elastically slidably provided with an abutment (42). The one-way limiting member is connected to the upper section (201) and slidably abuts against the abutment (42). The one-way limiting member allows the slider (41) to move only in one direction from bottom to top until the slider (41) reaches the upper end of the one-way limiting member and the restriction is lifted. The synchronizing ring (43) is rotatably mounted on the upper side inside the machine body (1) and slidably connected to the free end of the connecting rod (4).

8. The tobacco leaf liquid nitrogen cooling and grinding device according to claim 7, characterized in that: The one-way limiting component includes a base plate (5), lifting teeth (51) and a reset plate (52). The base plate (5) is fixedly connected to the upper section (201) and its length direction is parallel to the axis direction of the upper end. The number of lifting teeth (51) is several and they are evenly distributed along the length direction of the base plate (5). The lifting teeth (51) restrict the sliding head (41) from moving downward but do not affect the sliding head (41) from moving upward. The upper end of the base plate (5) is an inclined surface that slopes from top to bottom toward the connecting rod (2). The reset plate (52) is hinged to the lower end of the base plate (5). The hinge shaft between the reset plate (52) and the base plate (5) is provided with a torsion spring. In the static state, the reset plate (52) is rotated toward the side closer to the connecting rod (2) by the action of the torsion spring until the first direction of the reset plate (52) is parallel to the lifting surface of the lifting teeth (51).

9. The tobacco leaf liquid nitrogen cooling and grinding device according to claim 1, characterized in that: The lower side of the body (1) is also provided with a lifting assembly, which includes a telescopic device (7) and a tray (71). The telescopic device (7) is fixedly connected to the lower side of the body (1) and the output shaft axis coincides with the axis of the connecting rod (2). The tray (71) is connected to the output shaft of the telescopic device (7).

10. The tobacco leaf liquid nitrogen cooling and grinding apparatus according to claim 9, characterized in that: The tray (71) has a partition ring (72) on its lower side, and a grinding bowl is provided inside the tray (71). The outer diameter of the partition ring (72) is smaller than the outer surface diameter of the grinding bowl.

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