Coffee fruit peeling machine

Abstract

The coffee fruit peeling machine comprises a rack, a discharging hopper, a peeling roller, a discharging keel, a transmission mechanism, a driving mechanism, a coffee bean conveying assembly and a peel collecting bin, wherein the rack is provided with the discharging hopper, and the output end of the discharging hopper is provided with the peeling roller with a plurality of protruding nails on the outer wall surface; the lower side of the peeling roller is provided with the peel collecting bin matched therewith; the peeling roller is connected with the output end of the transmission mechanism; the input end of the transmission mechanism and the coffee bean conveying assembly are connected with the driving mechanism arranged on the rack; a plurality of discharging keels with guide grooves are arranged on the outer surface of the peeling roller in a circumferential interval; the guide groove is communicated with the output end of the discharging hopper at the inlet end and communicated with the coffee bean conveying assembly at the outlet end; the guide groove is provided with recesses and / or protrusions; and the transmission mechanism is provided with a power-free self-circulation lubricating assembly. The peeling rate is improved, and the self-circulation lubrication is realized.

Description

Technical Field

[0001] This invention relates to a peeling machine, and more particularly to a coffee fruit peeling machine, belonging to the field of mechanical design and manufacturing technology. Background Technology

[0002] After coffee cherries are harvested, the skin and pulp need to be removed as soon as possible, leaving only the white kernel—the coffee bean. This is done to prevent the fruit from undergoing natural fermentation, thus preventing the coffee beans from developing rancid or moldy flavors due to the fermentation of sugars in the pulp. This ensures the safety and purity of the flavor during subsequent drying and storage.

[0003] Currently, the peeling of fresh coffee cherries is mainly accomplished using a peeling machine. This machine utilizes peeling rollers with numerous protrusions on their outer walls, in conjunction with multiple feed ribs with guide grooves spaced around these rollers. The incoming fresh coffee cherries, guided by the feed ribs and guide grooves, rub and compress against the protrusions on the rotating outer wall of the peeling rollers, thus peeling the skin and pulp off the coffee beans. The peeled coffee beans are then conveyed to the next process, while the skin and pulp fall into a collection bin for unified collection and processing. The peeling rollers are powered by a transmission mechanism connected to a power unit, which drives the rollers to rotate. Because coffee cherry peeling machines are small-scale mechanical devices, in order to simplify the structure and reduce costs, the lubrication of the transmission mechanism mostly adopts a non-recirculating total loss lubrication method. This has several drawbacks: first, poor heat dissipation and inconsistent lubrication, leading to increased wear and even malfunctions in transmission components due to insufficient lubrication; second, requiring periodic shutdowns to inject lubricant, affecting equipment efficiency; and third, after the coffee cherries enter the feed chute, the peeling process creates a flat surface on the surface of the cherries, hindering further tumbling and friction within the feed chute, thus affecting the peeling rate. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0004] To address the problems of poor heat dissipation and lubrication continuity in the transmission mechanism of existing coffee cherry peeling machines due to the lack of circulating lubrication, and the flat surface formed on the coffee cherry after peeling off the skin and pulp, which hinders the continuous tumbling and friction of the coffee cherry in the feeding keel and thus affects the peeling rate, this invention provides a coffee cherry peeling machine.

[0005] This invention is achieved through the following technical solution: a coffee fruit peeling machine, comprising a frame, a hopper, a peeling roller, a feeding rib, a transmission mechanism, a drive mechanism, a coffee bean conveying assembly, and a peel collection bin, wherein: the frame is provided with a hopper, and at the output end of the hopper is a peeling roller with a plurality of protruding nails densely distributed on its outer wall surface; a peel collection bin is provided below the peeling roller and is connected to it; the peeling roller is connected to the output end of the transmission mechanism; the input end of the transmission mechanism and the coffee bean conveying assembly are poweredly connected to the drive mechanism provided on the frame; a plurality of feeding ribs with guide grooves are provided circumferentially along the outer surface of the peeling roller; the feeding end of the guide groove is connected to the output end of the hopper, and the discharge end is connected to the coffee bean conveying assembly; characterized in that: the guide groove has recesses and / or protrusions, and the transmission mechanism has a non-powered self-circulating lubrication assembly. This allows for self-circulation of lubricating oil without the need for an external circulation system, improving the heat dissipation capacity and lubrication continuity of the transmission mechanism. When fresh coffee cherries enter the feeding duct, the rotating peeling roller and the cooperation of several protrusions on its outer wall with the guide trough apply friction and compression forces to the fresh coffee cherries, thereby separating the outer skin from the pulp. The added depressions and protrusions in the guide trough allow the fresh coffee cherries to tumble under the obstruction of the depressions or protrusions, thus improving the peel removal rate.

[0006] Furthermore, the peeling roller includes: a vertical cylinder and an end cap located at the upper end of the vertical cylinder. The end cap has a central shaft hole for connecting to the output end of the transmission mechanism. A number of protruding nails are evenly distributed around the outer wall of the vertical cylinder. Each protruding nail is an arc-shaped protrusion, and each arc-shaped protrusion has a flat head on one side along the rotation direction of the vertical cylinder, so that the peel and pulp can be peeled off by the blade formed by the flat head on the protruding nail.

[0007] Furthermore, the feeding keel is arranged at equal or unequal angles, and at uniform or non-uniform intervals along the circumferential direction of the outer wall of the peeling roller. Each feeding keel has a guide groove extending vertically on its inner side. The guide groove cooperates with the outer wall of the peeling roller, and there is a gap between the two sides of the guide groove and the outer wall of the peeling roller for the fruit peel and pulp to pass through. The upper end of the guide groove has a feed inlet connected to the output end of the feeding hopper, and the lower end has a discharge outlet connected to the coffee bean conveying assembly. So that after the fresh coffee cherries enter the feed trough through the upper inlet, they slide down the feed trough under the action of gravity and come into contact with several protrusions on the outer wall of the peeling roller. Then, under the action of friction and compression, the skin and pulp on the surface of the fresh coffee cherries are separated from the coffee beans. The peeled coffee beans enter the coffee bean conveying assembly from the lower outlet, while the thinner and smaller skin and pulp that are peeled off are carried out of the feed trough through the gaps and fall into the skin collection bin below.

[0008] Furthermore, at least one recess is provided in the guide groove, located at the bottom of the guide groove, and at least one protrusion is provided in the guide groove, located on the inner wall of one or both sides of the guide groove. The recess and protrusion are arranged side by side or cross by cross in the guide groove, so that the coffee cherries are obstructed and their rolling properties are changed by the recess and protrusion, thereby causing the incompletely peeled skin and pulp parts on the coffee cherries to continue to rub and squeeze against the protrusions, thereby improving the peeling rate of the coffee cherries.

[0009] Furthermore, the transmission mechanism includes: a housing, a transmission cavity disposed within the housing, and a vertical transmission shaft and a horizontal transmission shaft disposed within the transmission cavity and connected to each other by a bevel gear pair. A helical blade is sleeved on the horizontal transmission shaft, and a circulation pipe is disposed on the outside of the housing, which is connected to both ends of the transmission cavity. So that when the horizontal drive shaft drives the spiral blades on it to rotate, the spiral blades cause the lubricating oil in the transmission cavity to form a power flow, thereby forming a self-circulating lubricating oil between the transmission cavity and the circulation pipe.

[0010] Furthermore, the transmission cavity includes a first, a second, and a third cavity. The first cavity is located at the connection between the lower end of the vertical transmission shaft and the inner end of the horizontal transmission shaft, and accommodates the bevel gear pair connecting the lower end of the vertical transmission shaft and the inner end of the horizontal transmission shaft. The second and third cavities respectively house the vertical and horizontal transmission shafts, which are connected to the first cavity. The second and third cavities are tubular structures with a circular cross-section, and their inner diameters are adapted to the outer diameters of the corresponding transmission shafts. Within the second and third cavities, bearings are rotatably connected to both ends of the vertical and horizontal transmission shafts, respectively, so that the transmission shafts and the bevel gear pair are located within the transmission cavity. Lubricating oil injected into the transmission cavity is used to lubricate and cool all transmission components within the transmission cavity.

[0011] Furthermore, the helical blade is sleeved on the inner end or middle shaft of the horizontal transmission shaft. The outer diameter of the helical blade is adapted to the inner diameter of the third cavity and a gap is maintained to allow the helical blade to rotate freely. The length of the helical blade is set as needed so that the helical blade can push the lubricating oil in the third cavity to form a kinetic oil, and then use the kinetic lubricating oil to efficiently lubricate all components in the transmission cavity.

[0012] Furthermore, a horizontal support platform is fixed inside the second cavity. The horizontal support platform has a shaft hole at its center that is rotatably connected to the vertical transmission shaft. A ring groove is provided around the top edge of the shaft hole, and a thrust bearing is provided in the ring groove. The thrust bearing is sleeved on the vertical transmission shaft. The bearing loose ring at the lower end of the thrust bearing is embedded in the ring groove, and the bearing tight ring at the upper end is engaged with a limiting recess on the vertical transmission shaft. The outer circumference of the horizontal support platform is provided with multiple vertical through grooves to connect the cavity above and below the horizontal support platform, so that the axial load of the vertical transmission shaft can be borne by the horizontal support platform and the thrust bearing, effectively alleviating the problem of transmission shaft wear caused by excessive axial force.

[0013] Furthermore, the housing is provided with an inlet and an outlet that communicate with the transmission cavity. One end of the pipe is connected to the outlet and the other end is connected to the inlet, so as to establish a circulation channel through the pipe.

[0014] The present invention has the following advantages and effects: 1. By using externally driven lubricating oil and relying on the kinetic energy generated by the spiral blades to complete autonomous circulation lubrication, the structure is simplified while the transmission mechanism is cooled by 15-20℃, the lubricating oil replacement cycle is extended by 2.5 times, and the equipment reliability is improved by more than 40%. 2. Through the concave and convex structure in the feeding trough, the fresh coffee cherries are obstructed and tumbled, achieving all-round peeling and increasing the peeling rate from 85% to over 95%. It can be adapted to fresh coffee cherries of different ripeness. Overall, it reduces equipment operating costs by 25%-30%, increases production efficiency by 20%, and combines multiple benefits such as cost reduction and efficiency improvement, stable quality, and environmental friendliness. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 for Figure 2 A sectional view; Figure 5 This is a structural diagram of the material feeding keel of the present invention; Figure 6 This is a cross-sectional view of the transmission mechanism of the present invention; Figure 7 This is a front view of the horizontal support platform of the present invention. Detailed Implementation

[0016] 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. Example

[0017] A coffee cherry peeling machine includes a frame 1, a feeding hopper 7, a peeling roller 5, a feeding rib 6, a transmission mechanism 8, a drive mechanism 2, a coffee bean conveying assembly 4, and a cherry peel collection bin 3; wherein: The frame 1 is equipped with a feeding hopper 7, and at the output end of the feeding hopper 7 is a peeling roller 5 with a plurality of protruding nails 51 densely distributed on its outer wall surface. Below the peeling roller 5 is a fruit peel collection bin 3 that is connected to it. The peeling roller 5 is connected to the output end of a transmission mechanism 8. The input end of the transmission mechanism 8 and the coffee bean conveying assembly 4 are poweredly connected to a drive mechanism 2 mounted on the frame 1. A plurality of feeding ribs 6, each containing a guide groove 61, are spaced circumferentially along the outer wall surface of the peeling roller 5. The feeding end of the guide groove 61 is connected to the output end of the feeding hopper 7, and the discharge end is connected to the coffee bean conveying assembly 4. Wherein: The feed channel 61 is provided with a recess 63 and a protrusion 62; The transmission mechanism 8 is equipped with a non-powered self-circulating lubrication component, which is used to realize the self-circulation of lubricating oil without the drive of an external circulation system, thereby improving the heat dissipation capacity and lubrication continuity of the transmission mechanism 8. After the fresh coffee cherries are distributed from the hopper 7 into the guide troughs 61 of each feed keel 6, the rotating peeling roller 5 and the protrusions 51 on its outer wall work together with the guide troughs 61 to apply force to the fresh coffee cherries, thereby separating the outer skin from the pulp. Then, through the depressions 63 and protrusions 62 added in the guide troughs 61, the fresh coffee cherries can be turned over by the obstruction of the depressions 53 or protrusions 62, thereby improving the peel removal rate.

[0018] As one embodiment, the hopper 7 includes: a hopper body with a feed inlet at the top, a feed guide plate 72 located in the upper part of the hopper body, a rotating feed plate 71 located in the middle of the lower part, and a feed channel 73 located around the rotating feed plate 71 and communicating with the feed end (upper end) of the feed trough 61. The rotating feed plate 71 is connected to the upper end of the peeling roller 5 and rotates together with the peeling roller 5 so that the fresh coffee fruit can be driven into the feed trough 61 through the rotating feed plate 71, so as to avoid the formation of dead corners in the feed while discharging the material evenly.

[0019] As an example, the peeling roller 5 includes: a vertical cylinder 52 and an end cap 53 disposed at the upper end of the vertical cylinder 52. The top of the end cap 53 is connected to the rotating material tray 71, and the end cap 53 has a shaft hole in the center for connecting to the output end of the transmission mechanism 8. A plurality of protruding nails 51 are evenly distributed around the outer wall of the vertical cylinder 52. Each protruding nail 51 is an arc-shaped protrusion, and each arc-shaped protrusion has a flat head on one side along the rotation direction of the vertical cylinder 52, so that the peel and pulp can be peeled off by the blade formed by the flat head on the protruding nail 51.

[0020] As one embodiment, the feeding keel 6 is evenly spaced at equal angles along the circumference of the outer wall of the peeling roller 5. Each feeding keel 6 has a guide groove 61 extending vertically on its inner side. The guide groove 61 cooperates with the outer wall of the peeling roller 5, and there is a gap between the two sides 64 of the guide groove 61 and the outer wall of the peeling roller 5 for the peel and pulp to pass through. The upper end of the guide groove 61 has a feed inlet communicating with the output end of the feeding hopper, and the lower end has a connection to the coffee bean conveying assembly 4. The coffee cherries have a clear discharge port so that after entering the feed trough 61 through the upper feed port, they slide down the feed trough 61 under the action of gravity and come into contact with several protrusions 51 on the outer wall of the peeling roller 5. Then, under the action of friction and compression, the peel and pulp on the surface of the coffee cherries are separated from the coffee beans. The peeled coffee beans enter the coffee bean conveying assembly 4 through the lower discharge port, while the thinner and smaller peels and pulp that are peeled off are carried out of the feed trough 61 through the gaps and fall into the peel collection bin 3 below.

[0021] As one embodiment, the recess 63 in the guide groove 61 is a single elliptical arc recess located on the bottom of the groove in the middle of the guide groove 61, and the protrusion 62 in the guide groove 61 is a single arc protrusion located on the inner wall of one side of the guide groove 61 next to the recess 63. This is so that the recess 63 and the protrusion 62 can cause the coffee cherries to change their rolling properties due to obstruction, thereby causing the incompletely peeled skin and pulp parts on the coffee cherries to continue to rub and squeeze against the protrusion 51, thereby improving the peeling rate of the coffee cherries.

[0022] As an example, the coffee bean conveying assembly 4 includes: a chute 41 connected to the discharge port at the lower end of each guide chute 61; a collecting hopper 42 connected below the chute 41; the bottom of the collecting hopper 42 being connected to one end of a horizontal cylinder 43; the other end of the horizontal cylinder 43 being connected to a downstream processing device; a spiral pusher 45 being provided inside the horizontal cylinder 43; the two ends of the spiral pusher 45 being rotatably supported inside the horizontal cylinder 43 by bearings 44; the outer end extending outward from the cylinder and being poweredly connected to the drive mechanism 2 to realize the conveying of peeled coffee beans.

[0023] As one embodiment, the transmission mechanism 8 includes: a housing 812 fixed to the cavity of the hopper 42 and the peeling roller 5 on the frame 1; a transmission cavity disposed in the housing 812; and a vertical transmission shaft 83 and a horizontal transmission shaft 81 rotatably disposed in the transmission cavity and connected to each other by a bevel gear pair. The horizontal transmission shaft 81 is provided with a helical blade 814. A circulation pipe 82 is provided on the outside of the housing 812. The circulation pipe 82 is connected to both ends of the transmission cavity, so that when the horizontal transmission shaft 81 drives the helical blade 814 to rotate, the helical blade 814 causes the lubricating oil in the transmission cavity to form a power flow, thereby forming a self-circulating lubricating oil between the transmission cavity and the circulation pipe 82.

[0024] As one embodiment, the transmission cavity includes a first cavity 811, a second cavity 86, and a third cavity 815. The first cavity 811 is located at the connection between the lower end of the vertical transmission shaft 83 and the inner end of the horizontal transmission shaft 81, and accommodates the bevel gear pair connecting the lower end of the vertical transmission shaft 83 and the inner end of the horizontal transmission shaft 81. The second cavity 86 and the third cavity 815 are respectively provided with the vertical transmission shaft 83 and the horizontal transmission shaft 81, and are both connected to the first cavity 811. The second cavity 86 and the third cavity 815 are tubular structures with a circular cross-section, and their inner diameter is adapted to the outer diameter of the corresponding transmission shaft. In the second cavity 86 and the third cavity 815, the two ends of the vertical transmission shaft 83 and the horizontal transmission shaft 81 are rotatably connected by bearings 85, so that the transmission shafts 83 and 81 and the bevel gear pair are all located in the transmission cavity. The lubricating oil injected into the transmission cavity is used to lubricate and cool all transmission components in the transmission cavity.

[0025] As one embodiment, the first cavity 811 is located between the second cavity 86 and the third cavity 815. All three cavities are formed inside the housing 812 and are interconnected.

[0026] As one embodiment, the upper end of the vertical drive shaft 83 extends upward out of the housing 812 and is sleeved on the shaft hole on the end cover 53 of the peeling roller 5. The lower end of the vertical drive shaft 53 meshes with the second bevel gear 813 located at the inner end of the horizontal drive shaft 81 through the first bevel gear 810. The first and second bevel gears form a bevel gear pair. The outer end of the horizontal drive shaft 81 extends outward out of the housing 812 and is poweredly connected to the drive mechanism 2. The housing 812 is provided with sealing rings 84 that mate with the outer ends of the vertical drive shaft 83 and the horizontal drive shaft 81, respectively, to achieve power connection, transmission and sealing.

[0027] As one embodiment, the drive mechanism 2 includes a power unit fixed on the frame 1 and a drive pulley 21 sleeved on the main shaft of the power unit. The drive pulley 21 is connected to a first driven pulley 22 located at the outer end of the spiral push rod 45 via a first transmission belt, and is connected to a second driven pulley 23 located at the outer end of the horizontal transmission shaft 81 via a second transmission belt, so that the power unit can simultaneously drive the peeling roller 5 and the spiral push rod 45 to run.

[0028] As one embodiment, the helical blade 814 is sleeved on the inner end shaft of the horizontal transmission shaft 81. The outer diameter of the helical blade 814 is adapted to the inner diameter of the third cavity 815 and a gap is maintained to allow the helical blade 814 to rotate freely. The length of the helical blade 814 is set as needed so that the helical blade 814 pushes the lubricating oil in the third cavity 815 to form a kinetic oil, thereby efficiently lubricating all components in the transmission cavity through the kinetic lubricating oil.

[0029] As one embodiment, a horizontal support platform 89 is fixed inside the second cavity 86. The horizontal support platform 89 has a shaft hole at its center that is rotatably fitted with the vertical transmission shaft 83. A ring groove 818 is provided around the top edge of the shaft hole. A thrust bearing 87 is provided in the ring groove 818. The thrust bearing 87 is fitted onto the vertical transmission shaft 83. The bearing loose ring at the lower end of the thrust bearing 87 is embedded in the ring groove 818, and the bearing tight ring at the upper end is engaged with a limiting recess on the vertical transmission shaft 83. The horizontal support platform 89 has multiple vertical through grooves 88 on its outer circumference to connect the cavities above and below the horizontal support platform 89, so that the axial load of the vertical transmission shaft 83 can be borne by the horizontal support platform 89 and the thrust bearing 87, effectively alleviating the problem of transmission shaft wear caused by excessive axial force.

[0030] As one embodiment, the housing 812 is provided with an inlet hole 817 and an outlet hole 816 that communicate with the transmission cavity. The input end of the circulation pipe 82 is screwed to the outlet hole 816 and the output end is screwed to the inlet hole 817. Sealing rings are provided between the input end and the outlet hole 816 and between the output end and the inlet hole 817 of the circulation pipe 82, so as to establish a self-circulation channel for lubricating oil through the circulation pipe. A three-way valve is provided at the input end of the circulation pipe 82 that is screwed to the outlet hole 816. The three-way valve is connected to one end of the oil supply pipe, and the other end of the oil supply pipe is connected to the oil tank, so as to provide lubricating oil periodically.

[0031] As an example, the fruit peel collection bin 3 is a conical bin with an open top. The conical bin is located at the bottom of the frame 1, and its open top is located below the peeling roller 8 and is connected to the peeling roller 5 so as to collect fruit peel and pulp through the fruit peel collection bin 3.

[0032] Working principle: After fresh coffee cherries enter from the hopper 7, they are evenly distributed by the rotating feed plate 71 linked to the peeling roller 5. Then, they enter the guide groove 61 between the peeling roller 5 and the feed keel 6 through the inlet, sliding down under gravity. Several protruding nails 51 with flat-headed blades on the outer wall of the peeling roller 5 rotate with the roller, applying friction and pressure to the outer skin of the coffee cherries, causing them to separate from the coffee beans. The depressions 63 and protrusions 62 in the guide groove 61 obstruct the flow of the coffee cherries, causing them to tumble and further peel off the remaining skin and pulp, greatly improving the peeling rate. After peeling, the skin and pulp... The peeled coffee beans are carried out of the gap between the peeling roller 5 and the guide trough 61 and fall into the fruit peel collection bin 3 below for collection. The peeled coffee beans are discharged from the discharge port at the lower end of the guide trough 61, collected in the collection hopper 42 via the chute 41, and then conveyed to the next processing equipment by the spiral pusher 45. The power unit drives the horizontal transmission shaft 81 to rotate, and through the meshing transmission of the second bevel gear 813 and the first bevel gear 810, it drives the vertical transmission shaft 83 to rotate to drive the peeling roller 5 to work. At the same time, the spiral blades 814, which rotate synchronously with the horizontal transmission shaft 81, push the lubricating oil in the transmission cavity. With the help of the pipe 82 connecting the two ends of the transmission cavity, the lubricating oil is circulated without power (see the lubricating oil circulation path). Figure 6 (As indicated by the middle arrow).

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A coffee cherry peeling machine, comprising a frame, a feeding hopper, a peeling roller, a feeding rib, a transmission mechanism, a drive mechanism, a coffee bean conveying assembly, and a cherry peel collection bin, wherein: The frame is equipped with a feeding hopper, and at the output end of the feeding hopper is a peeling roller with a densely distributed protruding nail on its outer wall. Below the peeling roller is a fruit peel collection bin that is matched with it. The peeling roller is connected to the output end of the transmission mechanism. The input end of the transmission mechanism and the coffee bean conveying assembly are poweredly connected to the drive mechanism on the frame. Several feeding ribs with guide grooves are arranged circumferentially along the outer surface of the peeling roller. The feeding end of the guide groove is connected to the output end of the feeding hopper, and the discharging end is connected to the coffee bean conveying assembly. The characteristic feature is that the guide groove has a recess and / or a protrusion, and the transmission mechanism has a non-powered self-circulating lubrication assembly.

2. The coffee cherry peeling machine according to claim 1, characterized in that... The peeling roller includes a vertical cylinder and an end cap located at the upper end of the vertical cylinder. The end cap has a central shaft hole for connecting to the output end of a transmission mechanism. The outer wall of the vertical cylinder is evenly distributed with a number of protruding nails. Each protruding nail is an arc-shaped protrusion, and each arc-shaped protrusion has a flat head on one side along the rotation direction of the vertical cylinder.

3. The coffee cherry peeling machine according to claim 1, characterized in that... The feeding keel is arranged at equal and / or unequal angles, and at uniform and / or non-uniform intervals along the circumferential direction of the outer wall of the peeling roller. Each feeding keel has a guide groove extending vertically on its inner side. The guide groove is matched with the outer wall of the peeling roller, and there is a gap between the two sides of the guide groove and the outer wall of the peeling roller for the peel and pulp to pass through. The upper end of the guide groove has a feed inlet connected to the output end of the feeding hopper, and the lower end has a discharge outlet connected to the coffee bean conveying assembly.

4. The coffee cherry peeling machine according to claim 1, characterized in that... The material guide groove has at least one recess located at the bottom of the groove, and the material guide groove has at least one protrusion located on the inner wall of one or both sides of the groove. The recess and protrusion are arranged side by side or cross each other in the material guide groove.

5. The coffee cherry peeling machine according to claim 1, characterized in that... The transmission mechanism includes: a housing, a transmission cavity disposed within the housing, and a vertical transmission shaft and a horizontal transmission shaft disposed within the transmission cavity and connected to each other by a bevel gear pair. A helical blade is sleeved on the horizontal transmission shaft. A circulation pipe is disposed on the outside of the housing, and the circulation pipe is connected to both ends of the transmission cavity.

6. The coffee cherry peeling machine according to claim 5, characterized in that... The transmission cavity includes a first, a second, and a third cavity. The first cavity is located at the connection between the lower end of the vertical transmission shaft and the inner end of the horizontal transmission shaft, and accommodates a pair of bevel gears connecting the lower end of the vertical transmission shaft and the inner end of the horizontal transmission shaft. The second and third cavities are respectively equipped with the vertical and horizontal transmission shafts, and are both connected to the first cavity. The second and third cavities are tubular structures with a circular cross-section, and their inner diameters are adapted to the outer diameters of the corresponding transmission shafts. The second and third cavities are rotatably connected to the two ends of the vertical and horizontal transmission shafts respectively through bearings.

7. The coffee cherry peeling machine according to claim 5, characterized in that... The helical blade is sleeved on the inner end or middle shaft of the horizontal transmission shaft. The outer diameter of the helical blade is adapted to the inner diameter of the third cavity and a gap is maintained to allow the helical blade to rotate freely. The length of the helical blade is set as needed.

8. The coffee cherry peeling machine according to claim 6, characterized in that... A horizontal support platform is fixed inside the second cavity. The center of the horizontal support platform has a shaft hole that is rotatably connected to the vertical transmission shaft. A ring groove is provided around the top edge of the shaft hole. A thrust bearing is provided in the ring groove and is sleeved on the vertical transmission shaft. The bearing loose ring at the lower end of the thrust bearing is embedded in the ring groove, and the bearing tight ring at the upper end is engaged with a limiting recess on the vertical transmission shaft. Multiple vertical through grooves are provided around the outer side of the horizontal support platform to connect the cavity above and below the horizontal support platform.

9. The coffee cherry peeling machine according to claim 5, characterized in that... The housing is provided with an inlet and an outlet that are connected to the transmission cavity. One end of the circulation pipe is connected to the outlet and the other end is connected to the inlet.

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