A drum-type jujube peeling device

Abstract

This invention relates to the technical field of food processing, and in particular to a drum-type jujube peeling device. The drum-type jujube peeling device provided by this invention includes: a housing; an inner cylinder rotatably disposed within the housing, with a pick-and-place port at one axial end and a peel discharge through hole on the side wall of the inner cylinder; a cantilevered rotating roller rotatably disposed within the housing, extending into the inner cylinder in a cantilever shape, adjacent to the inner bottom wall of the inner cylinder, and with a bottom material circulation gap between the roller and the inner bottom wall; and a drive mechanism disposed on the housing for driving the inner cylinder and the cantilevered rotating roller to rotate at different speeds. The drum-type jujube peeling device provided by this invention utilizes the three-dimensional dynamic friction generated by the differential rotation of the inner cylinder and the cantilevered rotating roller to achieve full tumbling and multi-angle contact of the jujubes, completely solving the problem of uneven peeling caused by passive contact in existing technologies.

Description

Technical Field

[0001] This invention relates to the technical field of food processing, and in particular to a drum-type jujube peeling device. Background Technology

[0002] Red dates are an important economic crop and traditional health food in my country, possessing rich nutritional and medicinal value. Peeling is a crucial step in the deep processing of red dates. Peeled dates have a delicate texture, better taste, and their nutrients are more easily absorbed by the body, making them widely used in the preparation of refined products such as date paste, date jam, and date powder.

[0003] Traditional methods for peeling jujubes mainly include manual peeling and chemical peeling. While manual peeling ensures the integrity of the jujubes, it is extremely inefficient and labor-intensive, making it unsuitable for industrial production. Chemical peeling involves soaking the jujubes in an alkaline solution to soften the peel before mechanical processing. Although this method is more efficient, it carries the risk of chemical residues, affecting product safety. Furthermore, the treated jujubes require extensive rinsing with water, increasing processing costs and environmental burden.

[0004] To address these issues, various mechanical peeling devices have emerged on the market. Existing mechanical peeling equipment primarily employs a working principle of fixed friction plates combined with material conveying. Dates are forcibly pushed onto the surface of the fixed friction plates via a conveying mechanism, where the peel is removed through compression and friction. However, this method has a significant technical problem: the contact between the dates and the friction plates is passive and brief. The duration and pressure of the dates' passive contact with the friction surface are difficult to control precisely, resulting in uneven peeling. Specifically, in a fixed friction plate system, the movement trajectory of the dates is relatively simple, mainly relying on the pushing force of the conveying mechanism to move forward. The contact angle and contact time with the friction plates are essentially fixed. Due to the irregular shape and varying size of the dates, the actual contact area and contact pressure between each date and the friction plate differ considerably. This leads to some dates not being thoroughly peeled, with noticeable peel residue remaining on the surface, while others may suffer damage to the flesh due to excessive contact pressure. Furthermore, the dates lack sufficient tumbling and multi-angle contact during processing; peeling is mainly concentrated on the areas in direct contact with the friction plates, while the peel on other parts is often difficult to remove effectively. Summary of the Invention

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a roller-type jujube peeling device that utilizes the three-dimensional dynamic friction generated by the differential rotation of the inner cylinder and the cantilever rotating roller to enable the jujubes to tumble fully and make contact at multiple angles, thus completely solving the problem of uneven peeling caused by passive contact in existing technologies.

[0006] (II) Technical Solution To achieve the above objectives, this application provides a drum-type jujube peeling device, comprising: a housing; an inner cylinder rotatably disposed within the housing, with a pick-and-place port at one axial end of the inner cylinder and a peel discharge through hole on the side wall of the inner cylinder; a cantilevered rotating roller rotatably disposed within the housing, extending into the inner cylinder in a cantilever shape, adjacent to the inner bottom wall of the inner cylinder, and with a bottom material circulation gap between the cantilevered rotating roller and the inner bottom wall of the inner cylinder; and a drive mechanism disposed on the housing for driving the inner cylinder and the cantilevered rotating roller to rotate at different speeds.

[0007] In one possible implementation, multiple flexible lifting plates are spaced apart along the axial direction on the inner wall of the inner cylinder to lift materials onto the cantilevered rotating roller.

[0008] In one possible implementation, the outer circumferential surface of the cantilever rotary roller is provided with multiple receiving grooves, which extend along the axial direction of the cantilever rotary roller and are used to receive materials lifted by the flexible lifting plate.

[0009] In one possible implementation, two cantilever rotating rollers are provided, which are symmetrically arranged on the left and right sides inside the inner cylinder, with a gap between the two cantilever rotating rollers.

[0010] In one possible implementation, a cantilevered collection hood is also provided inside the housing. The cantilevered collection hood extends into the inner cylinder in a cantilever shape and is located above the cantilevered rotating roller. The top of the cantilevered collection hood is provided with cleaning bristles that abut against the inner wall of the inner cylinder.

[0011] In one possible implementation, a baffle is provided at the top of the cantilever collection hood, the baffle being located outside the cleaning brush bristles, and the baffle maintaining an adjustable small gap with the inner wall of the inner cylinder.

[0012] In one possible implementation, an air jet assembly is provided inside the housing. The air jet assembly includes: an air jet pipe located outside the inner cylinder and directly above the cantilever collection hood, with the input end of the air jet pipe connected to an external high-pressure air source; and multiple air jet nozzles, each connected to the bottom of the air jet pipe, with the multiple air jet nozzles corresponding to the sludge discharge holes on the inner cylinder.

[0013] In one possible implementation, the bottom of the cantilever collection hood is provided with an arc-shaped shielding surface, which is located in the upper region between the two cantilever rotating rollers.

[0014] In one possible implementation, an end plate is provided at the end of the inner cylinder away from the loading / unloading port, and the driving mechanism includes: a drive motor connected to the housing, the output end of the drive motor connected to the end plate; a sun gear connected to the end plate; and planetary gears rotatably disposed inside the housing, the planetary gears meshing with the sun gear and connected to the cantilever rotating roller.

[0015] In one possible implementation, the speed ratio of the planetary gears to the sun gear is greater than or equal to 10:1.

[0016] In one possible implementation, it further includes: a frame, on which the housing is rotatably mounted via a pivot; and a tilting mechanism mounted on the frame, the output end of which is connected to the housing.

[0017] (III) Beneficial Effects Compared with existing technologies, this invention provides a drum-type jujube peeling device with the following advantages: This drum-type jujube peeling device adopts a differential rotation working mode between the inner drum and the cantilever rotating roller, which completely solves the problem of uneven peeling caused by passive contact of jujubes in existing technologies. When the inner drum and the cantilever rotating roller rotate at different speeds, the speed difference between the two generates continuous shear friction on the surface of the jujube. The rotation of the inner drum causes the jujube to tumble naturally, and the high-speed rotation of the cantilever rotating roller generates tangential friction at the contact point. When the shear force exceeds the bonding strength between the peel and the pulp, the peel is removed. The jujubes undergo three-dimensional tumbling motion inside the inner drum, and each surface can contact the cantilever rotating roller multiple times. Compared with the single, brief contact of the traditional fixed friction plate, the number of contacts and friction time are significantly increased, and the fullness of contact is greatly improved. The bottom material circulation gap allows the jujubes to form a stable material layer at the balance point of gravity and centrifugal force, which ensures effective contact with the cantilever rotating roller while avoiding excessive compression that damages the pulp. The separated peel is discharged through the peel discharge hole under centrifugal force, achieving continuous separation of the peel from the jujube. The loading and unloading ports facilitate continuous loading and unloading, making the entire process seamless and efficient. Compared to the passive contact method of traditional equipment, this device achieves active tumbling and full friction of the jujube, resulting in a more uniform peeling effect and providing a reliable technical solution for jujube processing. Attached Figure Description

[0018] Figure 1 This diagram illustrates the structure of a drum-type jujube peeling device according to an embodiment of this application. Figure 2 Show Figure 1 A magnified schematic diagram of the structure at point A; Figure 3 This is a top view schematic diagram of a roller-type jujube peeling device provided in an embodiment of this application; Figure 4 This diagram illustrates the structure of a sun gear and planetary gears according to an embodiment of this application.

[0019] Marked in the attached diagram: 1. Housing; 2. Inner cylinder; 21. Scale discharge through hole; 22. Flexible lifting plate; 23. End plate; 3. Cantilevered rotating roller; 31. Receiving groove; 4. Gap in the bottom material circulation; 5. Drive mechanism; 51. Drive motor; 52. Sun gear; 53. Planetary gears; 6. Cantilevered collection hood; 61. Cleaning brush bristles; 62. Baffle strip; 63. Curved shielding surface; 7. Jet assembly; 71. Jet pipe; 72. Jet nozzle; 8. Frame; 9. Tilting mechanism. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 4 This application provides a roller-type jujube peeling device, including: a housing 1; an inner cylinder 2, rotatably disposed inside the housing 1, with a pick-and-place port at one axial end of the inner cylinder 2 and a peel discharge through hole 21 on the side wall of the inner cylinder 2; a cantilever rotating roller 3, rotatably disposed inside the housing 1, extending into the inner cylinder 2 in a cantilever shape, adjacent to the inner bottom wall of the inner cylinder 2, and with a bottom material circulation gap 4 between the cantilever rotating roller 3 and the inner bottom wall of the inner cylinder 2; and a drive mechanism 5, disposed on the housing 1, for driving the inner cylinder 2 and the cantilever rotating roller 3 to rotate at different speeds.

[0022] In this invention, the differential rotation of the inner cylinder 2 and the cantilever rotating roller 3 completely solves the problem of uneven peeling caused by passive contact of jujubes in existing technologies. When the inner cylinder 2 and the cantilever rotating roller 3 rotate at different speeds, the difference in their rotation speeds generates continuous shear friction on the surface of the jujubes. The rotation of the inner cylinder 2 causes the jujubes to tumble naturally, while the high-speed rotation of the cantilever rotating roller 3 generates tangential friction at the contact point. When the shear force exceeds the bonding strength between the peel and the pulp, the peel is removed. The jujubes undergo three-dimensional tumbling motion inside the inner cylinder 2, allowing each surface to contact the cantilever rotating roller 3 multiple times. Compared with the single, brief contact of the traditional fixed friction plate, the number of contacts and the friction time are significantly increased, greatly improving the sufficiency of contact. The bottom material circulation gap 4 allows the jujubes to form a stable material layer at the balance point of gravity and centrifugal force, ensuring effective contact with the cantilever rotating roller 3 while avoiding excessive compression that could damage the pulp. The separated peel is discharged through the peel discharge hole 21 under centrifugal force, achieving continuous separation of the peel from the jujube. The loading and unloading ports facilitate continuous loading and unloading, making the entire process seamless and efficient. Compared to the passive contact method of traditional equipment, this device achieves active tumbling and full friction of the jujube, resulting in a more uniform peeling effect and providing a reliable technical solution for jujube processing.

[0023] When the drive mechanism 5 simultaneously drives the inner cylinder 2 and the cantilever rotating roller 3 to rotate at different speeds, the speed difference between the two generates shear friction on the surface of the jujube, mechanically separating the peel from the pulp. The cantilever structure avoids the problem of needing to set bearings on opposite sides of the inner cylinder 2 as required by traditional double-end support, maximizing the effective space of the inner cylinder 2 and simplifying the sealing structure. The bottom circulation gap allows the jujube to form a stable material layer at the bottom of the inner cylinder 2, ensuring effective contact with the cantilever rotating roller 3 while avoiding excessive compression that could damage the pulp.

[0024] Existing jujube peeling devices mostly use fixed friction plates combined with forced material conveying. The jujubes passively contact the friction surface, making it difficult to precisely control the contact pressure and time, often resulting in uneven peeling or excessive damage to the fruit flesh. This invention creates a dynamic three-dimensional peeling environment through the dual rotation of the inner cylinder 2 and the cantilevered rotating roller 3. The jujubes are fully tumbled and contact the rotating roller surface at multiple angles, significantly improving the consistency of the peeling effect. The single batch processing capacity is increased by more than 30% compared to traditional equipment.

[0025] In some embodiments, the inner wall of the inner cylinder 2 is provided with a plurality of flexible lifting plates 22 spaced apart along the axial direction for lifting materials onto the cantilever rotating roller 3.

[0026] In this invention, multiple flexible lifting plates 22 spaced axially along the inner wall of the inner cylinder 2 constitute an active material lifting system. When the inner cylinder 2 rotates, the lifting plates lift the jujubes deposited in the bottom circulation gap to the working height of the cantilever rotating roller 3, achieving effective frictional contact. The flexible material ensures that the lifting plates bend appropriately when bearing the weight of the jujubes, providing sufficient lifting force while avoiding hard impacts.

[0027] The working mechanism of the lifting plate is based on the relative positional change between the plate and the material as the inner cylinder 2 rotates. When the lifting plate rotates to the bottom of the inner cylinder 2, it naturally bends and inserts into the bottom layer of material. As the inner cylinder 2 continues to rotate, it gradually rises, lifting the jujubes it carries to a higher position. The axially spaced distribution ensures that all jujubes along the entire length of the inner cylinder 2 are lifted and processed, eliminating uneven axial processing. When the jujubes are lifted to the vicinity of the cantilevered rotating roller 3, the high-speed rotation of the roller attracts them to the surface, generating relative sliding friction to remove the skin.

[0028] The flexible lifting plate 22 of this invention actively undertakes the material conveying function, turning passive waiting into active lifting. Each jujube can be lifted to the working position multiple times, greatly increasing the contact opportunities with the rotating roller, and achieving a dual improvement in efficiency and quality.

[0029] In some embodiments, the outer peripheral surface of the cantilever rotating roller 3 is provided with a plurality of receiving grooves 31, which extend along the axial direction of the cantilever rotating roller 3 and are used to receive materials lifted by the flexible lifting plate 22.

[0030] In this invention, multiple receiving grooves 31 provided on the outer circumference of the cantilever rotating roller 3 provide dedicated space for receiving and positioning the jujubes lifted by the flexible lifting plate 22. The receiving grooves 31 extend along the entire axial length of the rotating roller, forming multiple independent material handling units. After the jujubes fall into the receiving grooves 31, the constraint effect of the groove walls prevents them from immediately detaching under gravity and centrifugal force, thus prolonging the frictional contact time with the surface of the rotating roller.

[0031] Specifically, the geometry of the receiving groove 31 has been specially optimized. The groove depth is sufficient to accommodate the jujubes without being too deep, which would prevent them from detaching properly. The bottom of the groove has a slightly curved design to match the shape of the jujubes and increase the contact area. When the cantilevered rotating roller 3 rotates at high speed, the jujubes in the receiving groove 31 experience strong friction against the bottom surface of the groove under the constraint of the groove wall. Under the combined action of shear force and friction, the peel gradually separates from the flesh surface. The axial extension of the receiving groove 31 eliminates processing blind spots, ensuring that jujubes in different axial positions receive the same processing intensity.

[0032] In one specific embodiment, the cantilever rotating roller 3 has an outer diameter of 70mm and eight evenly spaced receiving grooves 31 around its circumference. The grooves are 6mm deep, 15mm wide at the bottom, and 20mm wide at the opening. The receiving grooves 31 have a trapezoidal cross-section, facilitating the entry and exit of dates. When the rotating roller rotates at 180 rpm, the linear velocity of the receiving grooves 31 is approximately 0.66 m / s, and the centrifugal acceleration experienced by the dates within the grooves is approximately 3.1 m / s², ensuring sufficient friction without excessive impact. Actual tests show that setting the receiving grooves 31 increases peeling efficiency by 45% compared to a smooth surface, and reduces surface damage to the dates by 20%. The setting of the receiving grooves 31 fundamentally changes the interaction between the dates and the rotating roller. Under the constraint of the receiving grooves 31, the dates rotate synchronously with the rotating roller, eliminating slippage and achieving true forced friction, laying the foundation for standardized product quality.

[0033] In some embodiments, two cantilever rotating rollers 3 are provided, and the two cantilever rotating rollers 3 are symmetrically arranged on the left and right sides inside the inner cylinder 2, with a gap between the two cantilever rotating rollers 3.

[0034] In this invention, two cantilevered rotating rollers 3 are symmetrically arranged left and right within the inner cylinder 2 to create dual processing zones, significantly expanding the working coverage of the device. An appropriate gap is maintained between the two rotating rollers, providing necessary movement space for the jujubes and forming a natural transition channel between the two processing zones. The symmetrical arrangement also balances the mechanical environment within the inner cylinder 2, avoiding vibration and uneven wear problems that may result from unilateral loads.

[0035] Specifically, the symmetrical configuration of the two cantilevered rotating rollers 3 allows the jujubes to pass sequentially through two high-intensity processing zones during the rotation of the inner cylinder 2, ensuring thorough frictional peeling with each pass. Under the combined effects of gravity, centrifugal force, and the driving force of the rotating rollers, the jujubes form a complex three-dimensional motion trajectory between the two rollers, ensuring uniform processing of every surface. The gap design between the two rollers also considers the adaptability to jujubes of different sizes, preventing jamming due to excessively small gaps and ensuring effective processing even with excessively large gaps.

[0036] The dual-rotating roller configuration of this invention achieves a multiplier effect in processing capacity. The two processing zones work together to not only increase the processing volume per unit time, but more importantly, improve the stability of processing quality, providing technical support for large-scale continuous production.

[0037] In some embodiments, the device further includes a cantilever collection cover 6 disposed within the housing 1. The cantilever collection cover 6 extends into the inner cylinder 2 in a cantilever shape and is located above the cantilever rotating roller 3. A cleaning brush 61 is disposed on the top of the cantilever collection cover 6, and the cleaning brush 61 abuts against the inner wall of the inner cylinder 2.

[0038] In this invention, the introduction of the cantilever collection cover 6 solves the key technical problem of timely removal of separated fruit peels during the peeling process. The collection cover adopts a cantilever structure that corresponds to the cantilever rotating roller 3. It extends into the inner cylinder 2 from one side of the housing 1 and covers the area above the rotating roller. The cleaning brush 61 installed on the top forms a slight contact with the inner wall of the inner cylinder 2. As the inner cylinder 2 rotates, it continuously cleans the inner wall, ensuring the real-time removal of separated fruit peels and maintaining a clean environment in the peeling area.

[0039] Specifically, the contact relationship between the cleaning bristles 61 and the inner wall of the inner cylinder 2 is carefully designed to ensure sufficient cleaning force while avoiding excessive wear. The bristle material selection takes into account multiple requirements such as food safety, wear resistance, and flexibility. As the inner cylinder 2 rotates, fruit peel debris adhering to the inner wall is continuously scraped off by the bristles and falls into the cantilevered collection hood 6 under gravity, where it is guided to the peel discharge hole 21. This continuous cleaning mechanism prevents the accumulation of fruit peel inside the inner cylinder 2, thus preventing it from re-adhering to the surface of the jujubes or affecting subsequent peeling processes.

[0040] Peeling equipment commonly suffers from a decline in the cleanliness of its working chamber. Separated fruit peels easily adhere to the inner wall of the chamber, accumulating over time and affecting not only peeling efficiency but also potential product contamination. Traditional solutions involve periodic shutdowns for cleaning, severely impacting production efficiency. This invention's cantilevered collection hood 6 cleaning system enables simultaneous peeling and cleaning, maintaining a clean working environment without shutdown, thus creating conditions for continuous and automated production.

[0041] In some embodiments, a baffle 62 is provided on the top of the cantilever collection cover 6. The baffle 62 is located outside the cleaning brush bristles 61, and the baffle 62 maintains an adjustable small gap with the inner wall of the inner cylinder 2.

[0042] In this invention, the baffle 62 is located outside the cleaning brush bristles 61, maintaining an adjustable small gap with the inner wall of the inner cylinder 2. Its main function is to intercept the upward-moving jujubes, preventing them from accidentally entering the cantilever collection hood 6. The cantilever collection hood 6 extends into the inner cylinder 2 and is located above the cantilever rotating roller 3. The jujubes will generate complex movement trajectories under the rotation of the inner cylinder 2 and the action of the rotating roller. Some jujubes may move upward due to centrifugal force and the rotation roller. Without the baffle 62 to intercept them, the jujubes may enter the collection hood and mix with fruit peel debris, affecting the separation effect.

[0043] Specifically, the gap design between the baffle 62 and the inner wall of the inner cylinder 2 needs to meet two requirements: the gap must be smaller than the diameter of the jujube to effectively intercept it, and larger than the thickness of the peel to allow peel debris to pass through. Small jujubes are typically 10-12mm in diameter, while large jujubes can reach 18-20mm, and the thickness of the peel debris is only 0.2-0.5mm. The baffle 62 has a wedge-shaped cross-section with an acute angle at the front end, so that when a jujube hits the baffle 62, it can slide down along the wedge surface and return to the processing area.

[0044] This invention achieves precise isolation through the baffle 62, ensuring that the collection hood only collects fruit peels and extending the processing time of jujubes through its guiding effect. The adjustable gap allows the equipment to adapt to jujubes of different sizes, improving its versatility.

[0045] In some embodiments, a jet assembly 7 is provided inside the housing 1. The jet assembly 7 includes: a jet pipe 71 located outside the inner cylinder 2 and directly above the cantilever collection hood 6, with the input end of the jet pipe 71 connected to an external high-pressure air source; and a plurality of jet nozzles 72, which are respectively connected to the bottom of the jet pipe 71, and the plurality of jet nozzles 72 are correspondingly provided with the diaphragm discharge holes 21 on the inner cylinder 2.

[0046] In this invention, the jet assembly 7 represents a significant shift from passive to active peel removal. The jet pipe 71 is located outside the inner cylinder 2 and aligned with the cantilever collection hood 6. Its input end is connected to an external high-pressure air source. Multiple jet nozzles 72 are connected to the bottom of the jet pipe 71 and are correspondingly positioned with the peel removal through-hole 21. The introduction of high-pressure airflow provides a powerful driving force for the rapid and complete removal of fruit peels, ensuring that the airflow precisely targets the area where the peels are most concentrated.

[0047] Specifically, the jet system works by using the drag force generated by a high-speed airflow to draw fruit peel debris out of the discharge holes 21. An external high-pressure air source supplies compressed air to each jet nozzle 72 through the jet pipe 71. The high-speed airflow generated by the jet nozzles 72 creates a negative pressure area at the discharge holes 21, producing a strong suction effect. The suction force not only removes loose fruit peel debris but also peels off some stubborn residue adhering to the edges of the holes. The airflow direction and speed are precisely designed to ensure effective peel removal while avoiding any adverse effects on the jujubes.

[0048] Traditional fruit peel removal relies primarily on passive methods such as gravity and equipment vibration, resulting in slow and incomplete removal. This is especially problematic for sticky or small fruit peel fragments, where passive removal often proves inadequate, leading to peel accumulation within the equipment and impacting peeling quality and hygiene. This invention's active airflow peel removal system completely revolutionizes the efficiency and quality of fruit peel removal. The powerful drag force generated by the high-speed airflow can handle various types of fruit peel residue, ensuring a continuously clean working environment and providing crucial support for continuous equipment operation and automated control.

[0049] In some embodiments, the bottom of the cantilever collecting cover 6 is provided with an arc-shaped shielding surface 63, which is located in the upper region between the two cantilever rotating rollers 3.

[0050] In this invention, the arc-shaped shielding surface 63 is located in the upper region between the two cantilevered rotating rollers 3, demonstrating a deep understanding and precise control of the jujube's movement trajectory. In the dual rotating roller system, the jujube's movement trajectory is quite complex, involving gravity sinking, centrifugal rising, and the driving effect of the rotating rollers. The function of the arc-shaped shielding surface 63 is to guide the complex movement in an orderly manner, preventing the jujubes from leaving the processing area prematurely and ensuring that each jujube receives sufficient processing time.

[0051] Specifically, the radius of curvature of the arc-shaped shielding surface 63 is precisely calculated to match the natural movement trajectory of the jujubes in the dual-rotating roller system. When the jujubes move upward under the action of the rotating rollers, the arc-shaped shielding surface 63 guides them along the predetermined trajectory, preventing them from rushing out of the working area due to inertia. The smooth surface and suitable tilt angle of the shielding surface ensure that the impact on the jujubes is minimized when they come into contact with it, protecting them from damage. The shielding surface also serves to separate processed jujubes from those to be processed, preventing them from mixing and affecting the processing effect.

[0052] In one specific embodiment, the arc-shaped shielding surface 63 is made of food-grade stainless steel sheet, with a thickness of 2mm, a radius of curvature of 120mm, and an arc length of 180mm. The shielding surface is installed 18mm above the top of the rotating roller, ensuring both the normal passage of the jujubes and providing effective trajectory constraint. During operation, the average dwell time of the jujubes between the two rotating rollers increases from 15 seconds to 25 seconds, and the average number of contacts between a single jujube and the rotating roller increases from 8 to 14. The increase in dwell time and number of contacts directly translates into a significant improvement in the peeling effect. The guiding role of the arc-shaped shielding surface 63 enables active control of the jujube's movement trajectory. The intelligent guidance based on kinematic principles allows the jujubes to perform more thorough cyclical movement within the processing area, laying the foundation for obtaining consistent product quality.

[0053] In some embodiments, an end plate 23 is provided at the end of the inner cylinder 2 away from the loading and unloading port, and the driving mechanism 5 includes: a drive motor 51 connected to the housing 1, the output end of the drive motor 51 connected to the end plate 23; a sun gear 52 connected to the end plate 23; and a planetary gear 53 rotatably disposed inside the housing 1, the planetary gear 53 meshing with the sun gear 52, and the planetary gear 53 connected to the cantilever rotating roller 3.

[0054] In this invention, the drive mechanism 5 employs a planetary gear transmission system to achieve precise drive control of dual shafts by a single motor. The end plate 23 is located at the end of the inner cylinder 2 furthest from the loading / unloading port, providing a reliable mounting base for the drive system. The drive motor 51 is connected to the housing 1, and its output end is connected to the end plate 23, driving the inner cylinder 2 to rotate. The sun gear 52 is connected to the end plate 23 and rotates synchronously with the inner cylinder 2. The planetary gears 53 are rotatably mounted inside the housing 1, meshing with the sun gear 52 and simultaneously connected to the cantilever rotating roller 3. The core advantage of this transmission scheme is that it ensures a stable rotational speed relationship between the inner cylinder 2 and the cantilever rotating roller 3 through mechanical transmission, avoiding synchronization errors and control complexity that may occur in multi-motor systems.

[0055] Specifically, the working mechanism of the planetary gear transmission system is based on the kinematic characteristics of planetary gears. When the drive motor 51 drives the inner cylinder 2 and the fixed sun gear 52 to rotate, the planetary gears 53 meshing with the sun gear 52 both revolve around the sun gear 52 and rotate on their own axes. The rotational motion of the planetary gears 53 is transmitted to the cantilevered rotating roller 3 through the connecting shaft. The advantages of this transmission method are a constant transmission ratio, smooth transmission, and high load-bearing capacity. The compact structure of the planetary gear transmission allows the entire transmission system to be integrated within a limited installation space without affecting the overall layout of the equipment.

[0056] The single-motor planetary gear transmission scheme of this invention significantly simplifies the control system while ensuring transmission accuracy. The constant speed ratio ensured by mechanical transmission eliminates errors that may occur in electronic control synchronization, improves system reliability, and creates favorable conditions for the industrial application of equipment.

[0057] In some embodiments, the speed ratio of the planetary gear 53 to the sun gear 52 is greater than or equal to 10:1.

[0058] In this invention, the determination of a rotation speed ratio of 10:1 or higher is based on in-depth research and extensive experimental verification of the peeling mechanism of jujubes. The rotation speed ratio range ensures a sufficiently large relative speed difference between the cantilever rotating roller 3 and the inner cylinder 2, generating appropriate shear friction on the jujube surface. The lower limit of the rotation speed ratio, 10:1, is the critical point for effective peeling; below this value, the friction is insufficient to effectively separate the peel; appropriately exceeding this value ensures effective peeling while avoiding excessive damage to the fruit pulp.

[0059] Specifically, the binding force between the jujube peel and pulp mainly originates from the intercellular bio-glue. Effective separation requires sufficiently high shear stress. When the rotation speed ratio reaches 10:1, the relative friction speed on the jujube surface is approximately 1.3-1.8 m / s, generating a shear stress of about 150-200 kPa. This stress level is just sufficient to overcome the peel binding force of most jujube varieties. When the rotation speed ratio is further increased to 12:1-15:1, the shear stress increases to 250-300 kPa, which can handle varieties with stronger peel binding force while still remaining below the safe threshold for pulp damage.

[0060] This invention achieves the optimal balance between peeling effect and pulp protection by determining the rotation speed ratio parameters through systematic research. The parameters not only take into account the differences in characteristics of different varieties of jujubes, but also take into account the comprehensive requirements of processing efficiency and product quality, providing a reliable technical basis for standardized production.

[0061] In some embodiments, the device further includes: a frame 8, on which the housing 1 is rotatably mounted via a pivot; and a tilting mechanism 9, which is mounted on the frame 8 and whose output end is connected to the housing 1.

[0062] In this invention, the introduction of a tilting function transforms a fixed device into an adjustable one, fundamentally impacting its practicality and ease of operation. The frame 8 serves as the supporting foundation for the entire device, providing stable support for the housing 1. The rotating shaft connection allows the entire working unit, including the inner cylinder 2 and the rotating roller, to be angle-adjusted as a whole. The output end of the tilting mechanism 9 is connected to the housing 1 to transmit the power for angle adjustment, allowing the operator to adjust the equipment to the most suitable working angle according to specific needs.

[0063] Specifically, the tilting function plays a crucial role in all aspects of equipment operation. During the loading stage, tilting the equipment upwards at a certain angle allows the loading port to face upwards, facilitating the loading of dates using gravity and reducing the labor intensity of manual feeding. During the working stage, slight adjustments to the tilt angle can affect the distribution and movement trajectory of the dates within the inner cylinder 2, optimizing the peeling effect. During the unloading stage, tilting downwards promotes the natural discharge of processed dates, improving unloading efficiency. During the cleaning and maintenance stage, a large-angle tilt completely exposes the interior of the inner cylinder 2, facilitating thorough cleaning and comprehensive inspection.

[0064] Most peeling equipment uses a fixed installation method, and the angle of the equipment cannot be changed once it is determined. This design exhibits significant limitations when facing different operational needs, resulting in inconvenient loading and unloading, difficult cleaning and maintenance, and poor equipment versatility and adaptability. The tilting function of this invention allows a single machine to adapt to various working scenarios and operational requirements. This multi-functionality not only increases the equipment's usability but also provides users with greater operational flexibility. Especially in small and medium-sized processing enterprises with low levels of automation, the tilting function can significantly improve worker operating conditions and increase production efficiency.

[0065] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0066] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0067] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0068] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0069] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A roller-type jujube peeling device, characterized in that, include: Casing (1); The inner cylinder (2) is rotatably disposed inside the housing (1). One end of the inner cylinder (2) is provided with a pick-up and drop-out port, and the side wall of the inner cylinder (2) is provided with a skin discharge through hole (21). The cantilever rotating roller (3) is rotatably disposed inside the housing (1). The cantilever rotating roller (3) extends into the inner cylinder (2) in a cantilever shape. The cantilever rotating roller (3) is adjacent to the inner bottom wall of the inner cylinder (2) and a bottom material circulation gap (4) is left between it and the inner bottom wall of the inner cylinder (2). The drive mechanism (5) is mounted on the housing (1) and is used to drive the inner cylinder (2) and the cantilever rotating roller (3) to rotate at different speeds.

2. The drum-type jujube peeling device according to claim 1, characterized in that, The inner wall of the inner cylinder (2) is provided with a plurality of flexible lifting plates (22) spaced apart along the axial direction, which are used to lift the material onto the cantilever rotating roller (3).

3. The drum-type jujube peeling device according to claim 2, characterized in that, The outer circumferential surface of the cantilever rotating roller (3) is provided with a plurality of receiving grooves (31), which are arranged along the axial direction of the cantilever rotating roller (3) and are used to receive the material lifted by the flexible lifting plate (22).

4. The drum-type jujube peeling device according to any one of claims 1-3, characterized in that, There are two cantilever rotating rollers (3), which are symmetrically arranged on the left and right sides inside the inner cylinder (2), with a gap between the two cantilever rotating rollers (3).

5. The drum-type jujube peeling device according to claim 4, characterized in that, It also includes a cantilever collection cover (6) disposed in the housing (1), the cantilever collection cover (6) extends into the inner cylinder (2) in a cantilever shape and is located above the cantilever rotating roller (3), and the top of the cantilever collection cover (6) is provided with cleaning brush bristles (61), the cleaning brush bristles (61) abut against the inner wall of the inner cylinder (2).

6. The drum-type jujube peeling device according to claim 5, characterized in that, The top of the cantilever collection cover (6) is provided with a baffle (62), which is located outside the cleaning brush bristles (61). The baffle (62) maintains an adjustable small gap with the inner wall of the inner cylinder (2).

7. The drum-type jujube peeling device according to claim 5, characterized in that, An air jet assembly (7) is provided inside the housing (1), the air jet assembly (7) comprising: The jet pipe (71) is located outside the inner cylinder (2) and directly above the cantilever collection hood (6). The input end of the jet pipe (71) is connected to an external high-pressure gas source. Multiple air nozzles (72) are connected to the bottom of the air pipe (71), and the multiple air nozzles (72) are respectively arranged to correspond to the discharge holes (21) on the inner cylinder (2).

8. The drum-type jujube peeling device according to claim 5, characterized in that, The bottom of the cantilever collection cover (6) is provided with an arc-shaped shielding surface (63), which is located in the upper region between the two cantilever rotating rollers (3).

9. The drum-type jujube peeling device according to claim 1, characterized in that, The inner cylinder (2) is provided with an end plate (23) at the end away from the loading and unloading port, and the driving mechanism (5) includes: A drive motor (51) is connected to the housing (1), and the output end of the drive motor (51) is connected to the end plate (23); The sun gear (52) is connected to the end plate (23); Planetary gear (53) is rotatably disposed inside the housing (1). The planetary gear (53) meshes with the sun gear (52) and is connected to the cantilever rotating roller (3).

10. The drum-type jujube peeling device according to claim 1, characterized in that, Also includes: The frame (8) is rotatably mounted on the housing (1) via a pivot. A tilting mechanism (9) is mounted on the frame (8), and the output end of the tilting mechanism (9) is connected to the housing (1).

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