Coffee fruit peeling machine
By designing a multi-point coffee peeling machine, which utilizes the synchronous rotation of transmission gears and feeding rollers, combined with an adjustable peeling pressure plate, the problem of limited peeling points and high damage rate in existing peeling machines is solved, achieving efficient peeling and low damage, and reducing processing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN BAIRUI MECHANICAL EQUIP CO LTD
- Filing Date
- 2025-06-15
- Publication Date
- 2026-06-16
AI Technical Summary
Existing coffee cherry peeling machines have limited adjustment points, resulting in poor peeling performance, high damage rate, and the need for manual secondary sorting, which increases processing costs.
A coffee fruit peeling machine was designed, including a feeding hopper, a peeling and separating device, a receiving plate, a gear cover, a frame, a water separator, and a motor. Through the synchronous rotation of the transmission gear and the feeding roller, combined with an adjustable peeling pressure plate device, multi-point peeling is achieved, reducing the damage rate.
It achieves efficient peeling, reduces damage to fresh coffee cherries, improves operational efficiency, reduces the need for secondary manual sorting, and lowers processing costs.
Smart Images
Figure CN224356956U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a coffee processing equipment, and more particularly to a coffee peeling machine that removes the skin from fresh coffee cherries with minimal damage to the coffee and a high peeling rate. Background Technology
[0002] After coffee cherries are picked from the coffee tree, they undergo several processing steps, including peeling, degumming, drying, storage, hulling, and polishing. Finally, they are roasted to become the finished coffee beans available on the market. Among the pre-roasting processing steps, there are generally two methods: "dry" and "wet." The "dry" method is simple and low-cost, but it is easily affected by weather and has a higher impurity content, so it is mostly used for processing lower-grade coffee cherries. The "wet" method requires more investment of time and money, but it helps to ensure the quality of the coffee beans and reduce losses, so it is mostly used for processing high-quality coffee cherries.
[0003] The traditional "wet process" involves placing freshly picked coffee cherries into a rinsing tank. After removing the cherries floating on the surface, a pulp remover is used to peel off the skin and pulp. The force of the water flow then washes away the pulp and skin, removing small, underdeveloped cherries and further improving the quality of the coffee beans. However, to increase the water flow and force during rinsing, a larger water flow is often required, leading to water waste and pollution.
[0004] Existing coffee cherry peeling machines have unsatisfactory peeling results in production due to individual differences in coffee cherries and their relatively smooth shape, coupled with the limited adjustable points of the peeling machine. Small coffee cherries are prone to incomplete peeling, while larger coffee cherries are prone to damage and jamming. Overall, the peeling effect is unsatisfactory, requiring manual secondary sorting, which increases processing costs and losses. Summary of the Invention
[0005] The present invention addresses the problems of existing coffee cherry peeling machines, such as limited adjustment points, poor peeling effect, and high damage rate. It provides a coffee cherry peeling machine with multiple adjustment points, good peeling effect, low damage, and high operating efficiency.
[0006] This utility model discloses a coffee fruit peeling machine, characterized in that the peeling machine includes a feeding hopper, a wheel cover, a peeling and separating device, a receiving plate, a gear cover, a frame, a water separator, and a motor. The feeding hopper is located at the top of the frame, and its lower end is connected to the peeling and separating device. The peeling and separating device is fixedly connected to the frame on both sides, and a receiving plate is installed below it. A water separator is installed below the receiving plate, and the discharge direction of the water separator is opposite to that of the receiving plate. The wheel cover is located on the left side of the frame and is mounted on the side plate of the peeling and separating device. The gear cover is located on the right side of the frame. The motor is located below the water separator and is mounted in the middle of the frame via a motor mounting plate.
[0007] The peeling and separating device includes a transmission gear, side plates, a feeding roller, a peeling roller, a peeling pressure plate device, and a tail end fixing plate. The two side plates are arranged in parallel, and the feeding roller, peeling roller, peeling pressure plate device, and tail end fixing plate are all installed between the two side plates. Two transmission gears are installed on the outer end of the side plates, inside the gear cover, and mesh with each other. One transmission gear is installed on the rotating shaft of the peeling roller, and the other transmission gear is installed on the rotating shaft of the feeding roller. The peeling roller and the feeding roller rotate synchronously, but in opposite directions.
[0008] Several feeding rods are welded at intervals and in an alternating manner on the feeding roller. The feeding roller is located above the peeling roller, and both ends are mounted on the side plate through bearings with seats.
[0009] The outer surface of the peeling roller is stamped with fish-scale-like protrusions in an alternating pattern. Both ends are mounted on the frame via bearings with seats. A transmission gear is installed at one end of the rotating shaft of the peeling roller, and a pulley is installed at the other end. The power is transmitted through the transmission belt connected to the pulley of the motor.
[0010] The peeling pressure plate device is located at the rear end of the peeling roller and is connected and fixed to the side plates on both sides. The peeling pressure plate device includes an adjusting handwheel, adjusting bolts and a pressure plate. The adjusting handwheel passes through the screw hole on the tail end fixing plate and is connected to the upper end of the pressure plate. The lower end of the side plate is connected to the lower end of the pressure plate by two adjusting bolts. One side of the pressure plate is arc-shaped and has a discharge hole at the lower end. The lowest end of the pressure plate also has a fixing hole. The bolt passes through the fixing hole and is connected and fixed to the lower end of the side plate.
[0011] The coffee fruit peeling machine of this utility model has a simple and compact structure, ingenious design, multiple adjustment points, good peeling effect, low damage rate, high operating efficiency, and low failure rate.
[0012] During operation, start the motor and, once the machine is running normally, pour fresh coffee cherries into the feed hopper, then connect the water pipe. After peeling, the coffee cherries are discharged from the outlet at the bottom of the pressure plate, falling onto the discharge plate for discharge. The broken peels and pulp are washed onto the baffle plate and discharged with the wastewater, completing the peeling and impurity separation process for the coffee cherries. During the peeling process, adjust the tightness of the adjusting handwheel and adjusting bolts at the top of the pressure plate according to the size of the coffee cherries and the desired peeling effect. This changes the gap between the pressure plate and the peeling roller, allowing the equipment to achieve the best peeling effect. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model.
[0014] Figure 2 This is a schematic diagram of the peeling and separating device of this utility model.
[0015] Figure 3 This is a schematic diagram of the peeling and pressing plate device of this utility model.
[0016] Figure 4 This is a partial schematic diagram of the punching holes on the peeling roller of this utility model.
[0017] The components include: 1. Feed hopper; 2. Wheel cover; 3. Receiving plate; 4. Gear cover; 5. Frame; 6. Water baffle; 7. Motor; 8. Transmission gear; 9. Side plate; 10. Feeding roller; 11. Peeling roller; 12. Tail end fixing plate; 13. Adjusting handwheel; 14. Adjusting bolt; and 15. Pressure plate. Detailed Implementation
[0018] Example 1: A coffee fruit peeling machine includes a feeding hopper, a wheel cover, a peeling and separating device, a receiving plate, a gear cover, a frame, a water separator, and a motor. The feeding hopper is located at the top of the frame, and its lower end is connected to the peeling and separating device. The peeling and separating device is fixed to the frame on both sides, and a receiving plate is installed below it. A water separator is installed below the receiving plate, and the discharge direction of the water separator is opposite to that of the receiving plate. A wheel cover is located on the left side of the frame and is mounted on the side plate of the peeling and separating device. The gear cover is located on the right side of the frame. The motor is located below the water separator and is mounted in the middle of the frame via a motor mounting plate.
[0019] The peeling and separating device includes a transmission gear, side plates, a feeding roller, a peeling roller, a peeling pressure plate device, and a tail end fixing plate. The two side plates are arranged in parallel, and the feeding roller, peeling roller, peeling pressure plate device, and tail end fixing plate are all installed between the two side plates. Two transmission gears are installed on the outer end of the side plates, inside the gear cover, and mesh with each other. One transmission gear is installed on the rotating shaft of the peeling roller, and the other transmission gear is installed on the rotating shaft of the feeding roller. The peeling roller and the feeding roller rotate synchronously, but in opposite directions.
[0020] Several feeding rods are welded at intervals and in an alternating manner on the feeding roller. The feeding roller is located above the peeling roller, and both ends are mounted on the side plate through bearings with seats.
[0021] The outer surface of the peeling roller is stamped with fish-scale-like protrusions in an alternating pattern. Both ends are mounted on the frame via bearings with seats. A transmission gear is installed at one end of the rotating shaft of the peeling roller, and a pulley is installed at the other end. The power is transmitted through the transmission belt connected to the pulley of the motor.
[0022] The peeling pressure plate device is located at the rear end of the peeling roller and is connected and fixed to the side plates on both sides. The peeling pressure plate device includes an adjusting handwheel, adjusting bolts and a pressure plate. The adjusting handwheel passes through the screw hole on the tail end fixing plate and is connected to the upper end of the pressure plate. The lower end of the side plate is connected to the lower end of the pressure plate by two adjusting bolts. One side of the pressure plate is arc-shaped and has a discharge hole at the lower end. The lowest end of the pressure plate also has a fixing hole. The bolt passes through the fixing hole and is connected and fixed to the lower end of the side plate.
[0023] During operation, start the motor and, once the machine is running normally, pour fresh coffee cherries into the feed hopper, then connect the water pipe. After peeling, the coffee cherries are discharged from the outlet at the bottom of the pressure plate, falling onto the discharge plate for discharge. The broken peels and pulp are washed onto the baffle plate and discharged with the wastewater, completing the peeling and impurity separation processes for the coffee cherries. During the peeling process, adjust the tightness of the adjusting handwheel and adjusting bolts at the top of the pressure plate according to the size of the coffee cherries and the desired peeling effect. This changes the gap between the pressure plate and the peeling roller, allowing the equipment to achieve a better peeling effect.
Claims
1. A coffee fruit peeling machine, characterized in that... The peeling machine includes a feed hopper, a wheel cover, a peeling and separating device, a receiving plate, a gear cover, a frame, a water separator, and a motor. The feed hopper is located at the top of the frame, and its lower end is connected to the peeling and separating device. The peeling and separating device is fixed to the frame on both sides, and a receiving plate is installed below it. A water separator is installed below the receiving plate, and the discharge direction of the water separator is opposite to that of the receiving plate. The wheel cover is located on the left side of the frame and is mounted on the side plate of the peeling and separating device. The gear cover is located on the right side of the frame. The motor is located below the water separator and is mounted in the middle of the frame via a motor mounting plate. The peeling and separating device includes a transmission gear, side plates, a feeding roller, a peeling roller, a peeling pressure plate device, and a tail end fixing plate. The two side plates are arranged in parallel, and the feeding roller, peeling roller, peeling pressure plate device, and tail end fixing plate are all installed between the two side plates. Two transmission gears are installed on the outer end of the side plates, inside the gear cover, and mesh with each other. One transmission gear is installed on the rotating shaft of the peeling roller, and the other transmission gear is installed on the rotating shaft of the feeding roller. The peeling roller and the feeding roller rotate synchronously, but in opposite directions. Several feeding rods are welded at intervals and in an alternating manner on the feeding roller. The feeding roller is located above the peeling roller, and both ends are mounted on the side plate through bearing seats.
2. The coffee cherry peeling machine as described in claim 1, characterized in that... The outer surface of the peeling roller is stamped with fish-scale-like protrusions in an alternating pattern. Both ends are mounted on the frame via bearings with seats. A transmission gear is installed at one end of the rotating shaft of the peeling roller, and a pulley is installed at the other end. The shaft is connected to the pulley of the motor via a transmission belt to achieve power transmission.
3. The coffee cherry peeling machine as described in claim 1, characterized in that... The peeling pressure plate device is located at the rear end of the peeling roller and is connected and fixed to the side plates on both sides. The peeling pressure plate device includes an adjusting handwheel, adjusting bolts and a pressure plate. The adjusting handwheel passes through the screw hole on the tail end fixing plate and is connected to the upper end of the pressure plate. The lower end of the side plate is connected to the lower end of the pressure plate by two adjusting bolts. One side of the pressure plate is arc-shaped and has a discharge hole at the lower end. The lowest end of the pressure plate also has a fixing hole, through which the bolt passes and is connected and fixed to the lower end of the side plate.