Single motor driven mechanical linkage longan pitting machine

Abstract

The application provides a single-drive mechanical linkage longan pitting machine, which is provided with a rack with upper, middle and lower three layers of rack plates, and is provided with a driving mechanism, a conveying mechanism, a kernel lifting mechanism, a kernel removing mechanism, a linkage mechanism and a kernel meat lifting mechanism on the rack. The machine adopts a single-motor driven mechanical linkage design, only has a speed reducer motor as a mechanical power source, and the positioning and operation control of each station are all simple mechanical linkages, so that the machine is not easy to produce cumulative errors, the positioning is accurate, the pitting is accurate, and the kernel completeness after processing is good. Moreover, the kernel removing pincers for separating the fruit stem and the kernel in the kernel removing mechanism adopt split blades, which can match various different sizes of fruits, can completely separate the fruit stem and the kernel, and will not cause excessive loss of the kernel. In addition, the pincers head of the kernel removing pincers is freely arranged on the pincers seat, and after shutdown, the pincers head can be conveniently disassembled to clean the blade head part, and the next use is cleaner and more sanitary.

Description

TECHNICAL FIELD

[0001] The application relates to a fruit pitting machine, in particular to a single-motor-driven mechanical linkage longan pitting machine, and belongs to the technical field of food processing machines. BACKGROUND

[0002] Longan, also known as longan, is a common fruit in subtropical regions. The fruit has rich nutritional value and medicinal value for nourishing yin and kidney, tonifying qi, moistening the lungs and soothing the nerves, and stimulating the appetite and spleen. In addition to being eaten as fresh fruit, a portion of longan fruit is dried to increase its product value. There are mainly two methods for making dried longan: one is to dry the longan fruit with shell and kernel directly to make dried fruit. The dried longan made by this method has black-brown flesh, poor quality and appearance, and the flesh is closely connected with the kernel, which is not conducive to eating. The other method is to dry the longan flesh after removing the kernel and shell. The dried longan made by this method has orange-yellow flesh, good quality and appearance, and is easy to eat, with higher added value than directly dried fruit.

[0003] The early work of removing the kernel and shell of longan fresh fruit mainly relies on manual operation, which is low in efficiency and time-consuming and laborious. Therefore, some longan kernel and shell removing machines with higher working efficiency have been put on the market. The basic principle of the longan kernel and shell removing machine is to first cut the fruit stem of the longan kernel from the flesh with a cutter, and then to eject the longan kernel from the flesh with a thin ejector rod. However, the existing longan kernel and shell removing machine has the following defects when removing the kernel:

[0004] (1) The driving and positioning control is complex, resulting in inaccurate processing positioning, easy to accumulate errors, and further causing inaccurate kernel removal, incomplete separation of flesh and kernel, high loss rate of flesh and juice, poor integrity of processed flesh, and inability to obtain the best appearance of lantern-shaped flesh, which greatly reduces the product price.

[0005] (2) The cutter used to separate the fruit stem and the flesh is not designed reasonably, and most of them adopt a simple integral ring cutter. The ring-shaped cut of this type of cutter is difficult to match different sizes of fruits. If the cut is too small, the fruit stem and the flesh cannot be cut off, and the kernel removal will damage the appearance of the flesh. If the cut is too large, the separated fruit stem will carry too much flesh, causing flesh loss.

[0006] (3) The cutter is not convenient to disassemble and clean after kernel removal. The cutter will be soaked with a large amount of longan juice during use. If it is not cleaned in time after use, harmful substances such as mold will be produced, which will contaminate the flesh in the next use. SUMMARY

[0007] The present application aims to provide a single motor driven mechanical linkage longan core removing machine to solve the above-mentioned defects of the existing longan core removing and shelling machine.

[0008] The specific technical scheme of the present application is:

[0009] A single motor driven mechanical linkage longan core removing machine is provided with a rack with upper, middle and lower rack plates, and is provided with a main power mechanism, a conveying mechanism, a core removing mechanism, a shelling mechanism, a linkage mechanism and a shell meat removing mechanism on the rack.

[0010] The main power mechanism is supported and rotated by a bearing seat assembly at the middle of the lower layer of the rack, and a horizontal transverse main shaft is arranged at the right end of the main shaft, which is connected with a speed reducer motor through a shaft coupling. The speed reducer motor drives the main shaft, and the left end of the main shaft is connected with a driven shaft of the linkage mechanism through a vertically arranged chain transmission assembly, so that the driven shaft and the main shaft rotate synchronously. The shaft body of the main shaft is further sequentially connected with a left lever, a lower cam and a right lever which rotate synchronously with the main shaft from left to right. Further, a motor control box for controlling the speed reducer motor is arranged on one side of the rack, and a power switch and a speed adjusting knob are arranged on the motor control box.

[0011] The conveying mechanism is arranged outside the left side of the middle and lower layer of the rack, and two vertically arranged conveying chains are arranged in parallel and at intervals. The two conveying chains are driven and synchronized by a coaxial double-row driving sprocket arranged at the front end of the lower layer of the rack. The rear end of the lower layer of the rack and the front and rear ends of the middle layer of the rack are respectively provided with driven sprockets for supporting the conveying chains. The shaft of the driving sprocket extends to the left and is connected with a vertical star wheel, which is located in front of the main shaft of the main power mechanism and corresponds to the left lever on the main shaft. The left lever drives the vertical star wheel to rotate intermittently by one tooth position every revolution, and the driving sprocket rotates synchronously with the vertical star wheel. A group of material conveying plates are fixedly arranged between the two conveying chains and are uniformly distributed along the outer edge of the conveying chains. The material conveying plates move synchronously with the conveying chains. The vertical star wheel drives the conveying chains to move by one displacement of the material conveying plate every revolution. The material conveying plate is located directly above the core removing station when the material conveying plate is located at the uppermost end of the rear position, and the material conveying plate is located at the shelling meat station. A positioning hole and a fruit supporting hole are arranged on the material conveying plate.

[0012] The top core mechanism is provided with a top core hole in the lower layer shelf plate of the frame, a vertical sleeve is arranged below the top core hole, a ladder-shaped ejector rod which can slide up and down is arranged in the sleeve, the upper part of the ladder-shaped ejector rod is a thin needle rod for ejecting the core, the upper end of the thin needle rod extends upwards through the top surface opening of the sleeve and the top core hole of the lower layer shelf plate of the frame and is opposite to the center of the fruit holding hole of the conveying mechanism coreless work station feed plate, the lower part of the ladder-shaped ejector rod is a jacking post, the upper end of the jacking post is slidably inserted into the sleeve, a jacking post clamping bolt is arranged in the middle of the jacking post, a vertical return spring is arranged between the jacking post clamping bolt and the lower end surface of the sleeve on the outer side of the jacking post, the lower end of the jacking post is provided with a pulley and abuts against the lower cam on the driving shaft of the driving mechanism from the upper side, and the lower cam drives the ladder-shaped ejector rod to move up and down once per revolution; one end of the jacking post clamping bolt is further fixedly connected with a downward extending limiting fork head, and the limiting fork head is clamped on the driving shaft to prevent the ladder-shaped ejector rod from rotating.

[0013] The core removing mechanism is rotatably supported by a vertical rotating shaft which penetrates the middle layer shelf plate at a position right of the middle of the middle layer shelf plate of the frame through a bearing seat assembly, the upper end of the vertical rotating shaft penetrates above the upper layer shelf plate, a horizontal rotating disc is fixedly sleeved on the vertical rotating shaft at a position above the middle layer shelf plate and higher than the conveying mechanism, a circle of installation holes are uniformly distributed on the disc face of the rotating disc, one core removing clamp is arranged in each installation hole, a circle of positioning through holes are arranged on the inner side of the circle of installation holes of the rotating disc, each positioning through hole corresponds to one core removing clamp, a horizontal star-shaped wheel is fixedly connected to the lower end of the vertical rotating shaft below the middle layer shelf plate, the number of teeth of the horizontal star-shaped wheel is equal to the number of core removing clamps on the rotating disc and is an even number, the horizontal star-shaped wheel is located above the driving shaft of the driving mechanism and corresponds to the right lever on the driving shaft, the right lever drives the horizontal star-shaped wheel to intermittently rotate one tooth position per revolution, the rotating disc rotates synchronously with the horizontal star-shaped wheel, the horizontal star-shaped wheel drives the rotating disc to rotate by the displacement of one core removing clamp per rotation, the core removing clamps on the rotating disc are located in the left direction when the core removing clamps are in the coreless work station, and the center of the core removing clamps is opposite to the center of the fruit holding hole of the lower coreless work station feed plate, the core removing clamps on the rotating disc are located in the right direction when the core removing clamps are in the core releasing station.

[0014] The de-nucleating forceps is provided with a forceps seat and a forceps head; the forceps seat is provided with a vertical sliding cylinder penetrating from top to bottom, the lower cylinder opening of the sliding cylinder is provided with a circle of inwardly retracting blocking edges, the outer side of the sliding cylinder is connected with a locking nut through external threads, the lower end of the outer side of the sliding cylinder is provided with an outwardly spreading convex edge; the forceps head is provided with a cylindrical slider matching with the sliding cylinder of the forceps seat and capable of sliding up and down in the sliding cylinder, the cylindrical slider is provided with a central hole, a push rod is sleeved in the central hole, the lower end of the push rod is provided with a push head larger than the diameter of the central hole of the cylindrical slider, the center of the push rod is provided with a vertically penetrating thread hole, the top surface of the cylindrical slider is placed with a flat cover plate with a central hole, the upper end of the rod body of the push rod penetrates through the central hole of the cylindrical slider and the central hole of the flat cover plate upwards and extends outwards from the top surface of the flat cover plate, a vent screw is connected in the thread hole of the push rod, the screw head of the vent screw is pressed on the upper end surface of the push rod through a flat washer, the lower end of the vent screw extends downwards from the push head of the push rod by a distance, the center of the vent screw is provided with a vertically penetrating vent hole, a tension spring is sleeved on the rod body of the push rod between the flat washer and the flat cover plate, the push head at the lower end of the push rod is pulled upwards by the tension spring to abut against the lower side hole edge of the central hole of the cylindrical slider; the outer circumference of the cylindrical slider is provided with a vertical strip-shaped groove on each of the front, rear, left and right sides, the outer circumference of the cylindrical slider is further provided with two narrow and wide annular grooves on the lower part, the upper annular groove is a cutter shaft accommodating groove, the lower annular groove is a spring accommodating groove, one piece of blade is installed in each of the strip-shaped grooves; the blade is provided with a vertical blade body, the upper end of the vertical blade body is provided with a cutter shaft horizontally extending to both sides, the lower end of the vertical blade body is connected with an inclined blade body converging inward, the end of the inclined blade body is connected with a vertically downward extending blade head, the lower end of the blade head is provided with a cutting edge; the vertical blade bodies of the four pieces of blade are respectively movably embedded in the four strip-shaped grooves of the cylindrical slider, the cutter shaft is movably embedded in the cutter shaft accommodating groove of the cylindrical slider, the inclined blade body and the blade head are located below the cylindrical slider, one or more annular holding springs are arranged in the spring accommodating groove of the cylindrical slider, the holding springs hold the vertical blade bodies of the four pieces of blade from the outside to make the four pieces of blade converge inward, when the four pieces of blade are completely converged, the blade heads are combined together to form an annular cutting head, the push head of the push rod is located directly above the funnel-shaped frame formed by the inclined blade bodies of the four pieces of blade, the lower opening of the vent hole of the vent screw is located directly above the annular cutting head; the forceps head is freely placed on the sliding cylinder of the forceps seat through the flat cover plate, the cylindrical slider is sleeved on the upper part inside the sliding cylinder, the blade heads of the four pieces of blade extend downwards through the lower cylinder opening of the sliding cylinder.

[0015] Further, the left and right sides of the blade heads of the front and rear two side blades of the 4-blade are provided with inwardly bent vertical side edges, when the 4-blade is fully folded, the blade head side edges of the front and rear two side blades form a surrounding, and the blade heads of the left and right two side blades are attached to the periphery of the blade head side edges of the front and rear two side blades. When the split blade of the conventional split structure cuts into the fruit stem, the cutting effect of the joint seam of the blade head is not good, and the edge of the joint seam is easy to wear, causing the fruit stem and pulp to be partially adhered after cutting, affecting the final coring effect, and the present application surrounds the blade head side edges of the front and rear two side blades and attaches the blade heads of the left and right two side blades to the periphery of the blade head side edges of the front and rear two side blades, which can perfectly solve the problem of poor cutting effect of the joint seam of the blade head, and can effectively reduce the wear rate of the edge of the joint seam.

[0016] The linkage mechanism supports a horizontal transverse driven shaft through a bearing seat assembly at a position above the upper layer shelf plate of the frame and rotates, and the shaft body of the driven shaft is sequentially fixedly connected from left to right with a left positioning cam, a coring cam, a double right positioning cam, a releasing cam and a gas valve lever which rotate synchronously with the driven shaft; the upper layer shelf plate is provided above the positioning hole of the material feeding plate corresponding to the coring station through a guide hole, and is provided above the positioning through hole of the coring clamp corresponding to the coring station and the releasing station of the rotating disc through a guide hole, respectively, the positioning rod of the left positioning cam driven by the left positioning cam is inserted into the positioning hole of the material feeding plate corresponding to the coring station to position the material feeding plate, and the positioning rods of the two right positioning cam driven by the double right positioning cam are inserted into the positioning through hole of the coring clamp corresponding to the coring station and the releasing station of the rotating disc to position the rotating disc; the upper layer shelf plate is provided above the coring clamp corresponding to the coring station through a guide hole, and is provided above the coring clamp corresponding to the releasing station through a guide hole, the head of the left elastic head assembly driven by the coring cam pushes the push rod of the coring clamp corresponding to the coring station downward to control the coring clamp, and the head of the right elastic head assembly driven by the releasing cam pushes the push rod of the coring clamp corresponding to the releasing station downward and connects high pressure air to control the coring clamp; the upper layer shelf plate is provided with a mechanical gas valve with a roller switch on one side corresponding to the gas valve lever, the air inlet of the mechanical gas valve is connected to the outside air supply, the air outlet of the mechanical gas valve is connected to the air inlet of the right elastic head assembly through a gas conveying pipe, and the opening and closing of the mechanical gas valve is controlled by the gas valve lever, so that the right elastic head assembly provides high pressure air when the right elastic head assembly controls the opening of the coring clamp corresponding to the releasing station.

[0017] The left positioning rod assembly and the right positioning rod assembly adopt the same basic structure, and each is provided with a positioning rod which is downwardly extended and can slide up and down through a corresponding guide hole of the upper layer shelf plate, a rectangular frame sleeve which is fixedly connected to one side of the upper end of the positioning rod and vertically extends upward, the frame sleeve is movably sleeved on the outer periphery of the shaft body of the driven shaft, the upper end of the frame sleeve is provided with a pulley, the upper end of the positioning rod is further provided with a tension spring which is connected to the upper layer shelf plate on the front and back sides, and the pulley at the upper end of the frame sleeve is elastically abutted on the corresponding cam of the driven shaft from the upper side by the tension spring, and the corresponding cam drives the positioning rod to move up and down once per revolution.

[0018] The left elastic top head assembly and the right elastic top head assembly adopt the same basic structure, and each is provided with a top head which is downwardly extended and can slide up and down through a corresponding guide hole of the upper layer shelf plate, a top head clamping bolt which is longitudinally arranged at the upper position of the top head, a rectangular frame which is fixedly connected to one side of the upper end of the top head and vertically extends upward, the frame is movably sleeved on the outer periphery of the shaft body of the driven shaft, the upper end of the top head is provided with a pulley, and a tension spring is sleeved on the rod body of the top head between the top head clamping bolt and the upper layer shelf plate, and the pulley at the upper end of the top head is elastically abutted on the corresponding cam of the driven shaft from the lower side by the tension spring, and the corresponding cam drives the top head to move up and down once per revolution; the right elastic top head assembly is provided with a vertical air blowing channel which penetrates to the lower end surface of the top head inside the top head, one end of the top head clamping bolt serves as an air inlet of the right elastic top head assembly and is provided with an air passage which is in communication with the air blowing channel, and the lower end surface of the top head is provided with a ring of sealing rubber pads around the air outlet hole of the air blowing channel.

[0019] The top meat mechanism is provided with a horizontal longitudinal sliding sleeve which is installed below the middle layer shelf plate of the rack through a lower support plate, a horizontal longitudinal sliding rod is slidably sleeved in the sliding sleeve, a pushing end is arranged at the rear end of the sliding rod, the pushing end faces the center of the supporting fruit hole of the meat discharging workbench of the rear conveying mechanism, a clamping frame is arranged at the front end of the sliding rod, and a horizontal return spring is sleeved on the outer side of the sliding rod between the sliding sleeve and the clamping frame, so that the pushing end of the sliding rod is abutted on the rear end surface of the sliding sleeve; the top meat mechanism is provided with a vertical upwardly extending swing rod which is installed above the lower layer shelf plate of the rack and can swing forward and backward, the swing rod is located behind the driving shaft of the driving mechanism, the upper end of the swing rod is movably inserted into the clamping frame of the sliding rod, a supporting rod which extends forward is arranged at the middle part of the swing rod, a pulley is arranged at the end of the supporting rod and abutted on the lower cam on the driving shaft from the rear side, and the lower cam drives the swing rod to swing backward once per revolution, and then the swing rod pushes the sliding rod to push backward once.

[0020] The single motor driven mechanical linkage type design is adopted in the longan core removing machine, only one speed reducing motor is provided as the mechanical power source, the positioning and operation control of each station are all simple mechanical linkage, thus the cumulative error is not easy to occur, the processing positioning is accurate, the core removing is accurate, the fruit pulp and core are separated completely, the loss rate of fruit pulp and juice is low, the fruit pulp after processing is complete, the lantern-shaped fruit pulp with the best appearance can be obtained, the product selling price is increased. Moreover, the core removing pincers for separating the fruit stem and fruit pulp in the core removing mechanism of the machine adopt the split type blade, the design cooperation is ingenious, only the size of the cutter head is designed according to the size of the small fruit stem, the fruit stem and fruit pulp can be completely separated, and the fruit pulp loss is not caused. In addition, the pincers head of the machine is freely arranged on the pincers seat, after shutdown, the pincers head can be conveniently disassembled to clean the cutter head part, the next use is cleaner and more sanitary. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective structural schematic view of the longan core removing machine.

[0022] Figure 2 It is Figure 1 The front view of the longan core removing machine.

[0023] Figure 3 It is Figure 1 The left view of the longan core removing machine.

[0024] Figure 4 It is Figure 1 The perspective structural schematic view of the longan core removing machine after being turned 180° front and back.

[0025] Figure 5 It is the schematic view of the linkage mechanism at the upper layer shelf plate of the rack.

[0026] Figure 6 It is the schematic view of the main power mechanism at the lower layer shelf plate of the rack.

[0027] Figure 7 It is the schematic view of the conveying mechanism conveying plate.

[0028] Figure 8 It is Figure 7 The exploded view of the conveying plate.

[0029] Figure 9 It is the schematic view of the core removing mechanism.

[0030] Figure 10 It is Figure 9 The front sectional view of the core removing mechanism.

[0031] Figure 11 It is the schematic view of the core removing mechanism.

[0032] Figure 12 A three-dimensional schematic diagram of the denucleation mechanism after the denucleation clamp has been removed.

[0033] Figure 13 This is a three-dimensional structural diagram of the nucleoclastic clamp.

[0034] Figure 14 for Figure 13 Front cross-sectional view of the nucleus removal clamp.

[0035] Figure 15 for Figure 14 Enlarged cross-sectional view of the blade of the nucleolytic forceps along the AA direction.

[0036] Figure 16 This is a three-dimensional structural diagram of the nucleus removal clamp holder.

[0037] Figure 17 This is a three-dimensional structural diagram of the denucleation forceps head.

[0038] Figure 18 This is a schematic diagram of the three-dimensional structure of the denucleation forceps head after it has been rotated 180° up and down.

[0039] Figure 19 for Figure 17 Exploded view of the jaws of the denuclearizing forceps.

[0040] Figure 20 This is a three-dimensional structural diagram of the left positioning rod assembly of the linkage mechanism.

[0041] Figure 21 This is a three-dimensional structural diagram of the right positioning rod assembly of the linkage mechanism.

[0042] Figure 22 This is a three-dimensional structural diagram of the left elastic top assembly of the linkage mechanism.

[0043] Figure 23 This is a three-dimensional structural diagram of the right elastic top assembly of the linkage mechanism.

[0044] Figure 24 for Figure 23 Front cross-sectional view of the right elastic top assembly.

[0045] Figure 25 This is a three-dimensional structural diagram of the support carriage of the conveying mechanism.

[0046] Figure 26 This is a three-dimensional structural diagram of the lower tray of the core removal mechanism.

[0047] Figure 27 This is a three-dimensional structural diagram of the top shell meat mechanism.

[0048] Figure: 1-frame, 2-driving shaft, 3-reduction motor, 3.1-motor control box, 4-chain transmission assembly, 5-driven shaft, 6-left push rod, 7-lower cam, 8-right push rod, 9-conveying chain ring, 10-driving sprocket, 11-driven sprocket, 12-vertical star wheel, 13-conveying plate, 13.1-positioning hole, 13.2-fruit holder hole, 13.3-upper pressing plate, 13.31-positioning upper hole, 13.32-upper pressing hole, 13.4-intermediate plate, 13.41-positioning intermediate hole, 13.42- bracket mounting hole, 13.5-lower supporting plate, 13.51-lower bottom hole, 13.6-fruit holder bracket, 14-supporting bracket, 15-limiting stopper, 16-sleeve, 17-ladder top rod, 17.1-fine needle rod, 17.2-top post, 18-top post clamping bolt, 19-vertical return spring, 20-limiting fork head, 21-vertical rotating shaft, 22-rotating disc, 22.1-mounting hole, 22.2-positioning through hole, 23-nucleus removing forceps, 24-horizontal star wheel, 25-nucleus removing inclined chute, 26-lower supporting plate, 27-sliding cylinder, 28-locking nut, 29-cylindrical sliding block, 29.1-strip-shaped groove, 29.2-knife shaft accommodating groove, 29.3-spring accommodating groove, 30-push rod, 31-flat cover, 32-ventilation bolt, 32.1-ventilation hole, 33-flat washer, 34-tension spring, 35-blade, 35.1-vertical blade body, 35.2-knife shaft, 35.3-inclined blade body, 35.4-blade head, 35.5-side edge, 36-holding spring, 37-left positioning cam, 38-nucleus removing cam, 39-double right positioning cam, 40-nucleus releasing cam, 41-gas valve push rod, 42-left positioning rod assembly, 43-right positioning rod assembly, 44-left elastic top head assembly, 45-right elastic top head assembly, 46-mechanical gas valve, 47-gas conveying pipe, 48-positioning rod, 49-frame sleeve, 50-tension spring, 51-guide sleeve, 52-U-shaped stop bar, 53-limiting rod, 54-top head, 54.1-air blowing channel, 55-top head clamping bolt, 56-rectangular frame, 57-tension spring, 58-sealing rubber gasket, 59-lower supporting plate, 60-sliding sleeve, 61-sliding rod, 61.1-thrust end, 61.2-clamping frame, 62-horizontal return spring, 63-rocker lever, 63.1-branch lever. DETAILED DESCRIPTION

[0049] The application will be further described below with reference to the drawings. In the description of the application, the terms "front", "back", "left", "right", "upper", "lower", and the like are defined based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application, and should not be regarded as a limitation on the application. Figure 1 The terms "front", "back", "left", "right", "upper", "lower", and the like are defined based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application, and should not be regarded as a limitation on the application.

[0050] As shown in the drawings, the application is characterized in that the conveying plate 13 is provided with a plurality of positioning holes 13.1, fruit holder holes 13.2, upper pressing plates 13.3, and intermediate plates 13.4, and the conveying plate 13 is provided with a plurality of positioning holes 13.1, fruit holder holes 13.2, upper pressing plates 13.3, and intermediate plates 13.4. Figures 1-4As shown, the longan core removing machine is provided with a rack 1 with upper, middle and lower three layers of rack plates, and the rack 1 is provided with a main power mechanism, a conveying mechanism, a core lifting mechanism, a core removing mechanism, a linkage mechanism and a shell meat lifting mechanism.

[0051] As shown, Figures 5-6 the main power mechanism is supported and rotated by a bearing seat assembly at a horizontal transverse main driving shaft 2 at the middle of the front and back of the lower layer of rack plates of the rack 1, the right end of the main driving shaft 2 is connected with a speed reducer motor 3 through a coupling, the main driving shaft 2 is driven by the speed reducer motor 3, the left end of the main driving shaft 2 is connected with a driven shaft 5 of the linkage mechanism through a vertically arranged chain transmission assembly 4, so that the driven shaft 5 rotates synchronously with the main driving shaft 2; the shaft body of the main driving shaft 2 is further sequentially connected with a left push rod 6, a lower cam 7 and a right push rod 8 which rotate synchronously with the main driving shaft 2 from left to right. One side of the rack 1 is provided with a motor control box 3.1 for controlling the speed reducer motor 3, and the motor control box 3.1 is provided with a power switch and a speed adjusting knob.

[0052] As shown, Figures 1-4 and Figure 6 the conveying mechanism is provided with two vertically arranged conveying chain rings 9 which are arranged in parallel and at intervals outside the middle left position of the middle and lower layers of rack plates of the rack 1, the two conveying chain rings 9 are driven and synchronously advanced by coaxial double-row driving sprockets 10 arranged at the front end of the lower layer of rack plates, and driven sprockets 11 for supporting the conveying chain rings 9 are arranged at the front and back ends of the middle layer of rack plates, respectively, the shaft of the driving sprocket 10 extends to the left and is connected with a vertical star wheel 12, the vertical star wheel 12 is located in front of the main driving shaft 2 of the main power mechanism and corresponds to the left push rod 6 on the main driving shaft 2, the left push rod 6 drives the vertical star wheel 12 to rotate intermittently by one tooth position every rotation, and the driving sprocket 10 rotates synchronously with the vertical star wheel 12; a group of material conveying plates 13 which are uniformly distributed along the outer edge of the conveying chain rings 9 are fixedly arranged across the two conveying chain rings 9, the material conveying plates 13 synchronously walk with the conveying chain rings 9, the vertical star wheel 12 drives the conveying chain rings 9 to walk by the displacement of one material conveying plate 13 every rotation of one tooth position, and the material conveying plate 13 is located directly above the core lifting mechanism when it is located at the uppermost end in the rear, which is the shell meat lifting position; the material conveying plate 13 is provided with a positioning hole 13.1 and a fruit supporting hole 13.2.

[0053] As shown, Figures 6-8The feeding plate 13 is fixedly connected to the bent plates on the sides of the two conveying chain rings 9 through bolts on the left and right sides. The feeding plate 13 is composed of an upper pressing plate 13.3, an intermediate plate 13.4 and a lower supporting plate 13.5 stacked one on top of another. The right end of the lower supporting plate 13.5 is provided with a lower bottom hole 13.51. The left and right ends of the intermediate plate 13.4 are respectively provided with a positioning middle hole 13.41 and a bracket mounting hole 13.42. The bracket mounting hole 13.42 is axially aligned with the lower bottom hole 13.51, and the diameter of the bracket mounting hole 13.42 is greater than that of the lower bottom hole 13.51. A stainless steel fruit supporting rack 13.6 is embedded in the bracket mounting hole 13.42. The fruit supporting rack 13.6 is provided with a cylindrical wall matched with the bracket mounting hole 13.42. The upper edge of the cylindrical wall is provided with a plurality of arc-shaped supporting pieces bent inward and downward. The arc-shaped supporting pieces together form an elastic supporting bowl. The left and right ends of the upper pressing plate 13.3 are respectively provided with a positioning upper hole 13.31 and an upper pressing hole 13.32. The positioning upper hole 13.31 is axially aligned with the positioning middle hole 13.41 and has the same diameter. The upper pressing hole 13.32 is axially aligned with the bracket mounting hole 13.42, and the diameter of the upper pressing hole 13.32 is smaller than that of the bracket mounting hole 13.42. The positioning upper hole 13.31 and the positioning middle hole 13.41 together form a positioning hole 13.1 of the feeding plate 13. The upper pressing hole 13.32, the fruit supporting rack 13.6 and the lower bottom hole 13.51 together form a fruit supporting hole 13.2 of the feeding plate 13.

[0054] In order to ensure that the feeding plate 13 travels horizontally above the layer rack plate in the rack 1, as shown in Figure 3 and Figure 25 , the top surface of the layer rack plate in the rack 1 is provided with a longitudinal supporting carriage 14 corresponding to the position where the feeding plate 13 passes through, which supports the passing feeding plate 13 from the bottom surface through the pulley on the supporting carriage 14 to prevent the feeding plate 13 from falling down during the travel. Figure 1 and Figure 4 , the top surface of the layer rack plate in the rack 1 is provided with a limiting stop block 15 corresponding to the right side edge of the travel of the feeding plate 13 to prevent the feeding plate 13 from tilting up during the travel.

[0055] As shown in Figures 1-4 , Figure 6 and Figures 9-10As shown, the top core mechanism is provided with a top core hole in the lower layer of the frame 1, and a vertical sleeve 16 is arranged below the top core hole. A stepped ejector rod 17 is arranged in the sleeve 16 and can slide up and down. The upper part of the stepped ejector rod 17 is a thin needle rod 17.1 for ejecting the core, and the upper end of the thin needle rod 17.1 extends upward through the top surface opening of the sleeve 16 and the top core hole of the lower layer of the frame 1 and is opposite to the center of the fruit supporting hole 13.2 of the fruit supporting plate 13 of the conveying mechanism. The lower part of the stepped ejector rod 17 is a top post 17.2, and the upper end of the top post 17.2 is slidably inserted into the sleeve 16. A top post latch 18 is arranged in the middle of the top post 17.2. A vertical return spring 19 is arranged between the top post latch 18 and the lower end of the sleeve 16. The lower end of the top post 17.2 is provided with a pulley and is abutted on the lower cam 7 of the driving shaft 2 through the pulley. The lower cam 7 drives the stepped ejector rod 17 to move up and down once per revolution. One end of the top post latch 18 is further fixedly connected with a downward extending limiting fork head 20, and the limiting fork head 20 is clamped on the driving shaft 2 to prevent the stepped ejector rod 17 from rotating.

[0056] As shown in Figures 1-4 , Figure 6 and Figures 11-12 , the core removing mechanism is rotatably supported by a vertical rotating shaft 21 which penetrates the middle layer of the frame 1 and is rotatably supported by a bearing seat assembly at a position right of the middle layer of the frame 1. The upper end of the vertical rotating shaft 21 penetrates the upper layer of the frame 1. A horizontal rotating disc 22 is fixedly connected to the vertical rotating shaft 21 at a position above the middle layer of the frame 1 and higher than the conveying mechanism. The rotating disc 22 is provided with a circle of installation holes 22.1 which are uniformly distributed along the circumferential direction of the disc. One core removing clamp 23 is arranged in each installation hole 22.1. The rotating disc 22 is further provided with a circle of positioning through holes 22.2 at the inner side of the circle of installation holes 22.1. Each positioning through hole 22.2 corresponds to one core removing clamp 23. The lower end of the vertical rotating shaft 21 is fixedly connected with a horizontal star-shaped wheel 24 below the middle layer of the frame 1. The number of teeth of the horizontal star-shaped wheel 24 is equal to the number of core removing clamps 23 on the rotating disc 22 and is an even number. The horizontal star-shaped wheel 24 is located above the driving shaft 2 of the driving mechanism and corresponds to the right lever 8 on the driving shaft 2. The right lever 8 drives the horizontal star-shaped wheel 24 to rotate intermittently by one tooth position per revolution. The rotating disc 22 rotates synchronously with the horizontal star-shaped wheel 24. The horizontal star-shaped wheel 24 drives the rotating disc 22 to rotate by the displacement of one core removing clamp 23 per tooth position. When the core removing clamps 23 on the rotating disc 22 are located at the left, the core removing clamps 23 are at the core removing position. The center of the core removing clamps 23 at the core removing position is opposite to the center of the fruit supporting hole 13.2 of the fruit supporting plate 13 below. When the core removing clamps 23 on the rotating disc 22 are located at the right, the core removing clamps 23 are at the core releasing position. Further, the frame 1 is provided with a core discharging chute 25 below the core releasing position of the core removing clamps 23 for receiving the fallen longan cores and discharging the longan cores to one side. Further, a horizontal discharging chute 26 is arranged below the rotating disc 22. Figure 26The lower tray 26 is fixedly installed above the layer plate of the rack 1 through the supporting legs, and a central opening is arranged in the center of the lower tray 26 for the vertical rotating shaft 21 to pass through. The top surface of the lower tray 26 supports the bottom surface of the rotating disc 22, preventing the rotating disc 22 from tilting during rotation.

[0057] As Figures 13-19As shown, the de-nucleating forceps 23 is provided with a forceps seat and a forceps head two major parts; the forceps seat is provided with a vertical sliding cylinder 27 which is through from top to bottom, the lower cylinder mouth of the sliding cylinder 27 is provided with a circle of inwardly retracting blocking edge, the outer side of the sliding cylinder 27 is connected with a locking nut 28 through external thread, the lower end of the outer side of the sliding cylinder 27 is provided with an outwardly spreading convex edge; the forceps head is provided with a cylindrical slider 29 which is matched with the sliding cylinder 27 of the forceps seat and can slide up and down in the sliding cylinder 27, the cylindrical slider 29 is provided with a central hole, a push rod 30 is slidably sleeved in the central hole, the lower end of the push rod 30 is provided with a push head which is larger than the hole diameter of the central hole of the cylindrical slider 29, the center of the push rod 30 is provided with a through hole which is through from top to bottom, the top surface of the cylindrical slider 29 is placed with a flat cover 31 which is provided with a middle hole, the upper end of the push rod 30 is upwardly extended out of the top surface of the flat cover 31 after passing through the central hole of the cylindrical slider 29 and the middle hole of the flat cover 31, a vent bolt 32 is connected in the through hole of the push rod 30, the screw head of the vent bolt 32 is pressed on the upper end surface of the push rod 30 through a flat washer 33, the lower end head of the vent bolt 32 is extended downwardly from the push head of the push rod 30 by a distance, the center of the vent bolt 32 is provided with a vent hole 32.1 which is through from top to bottom, the rod body of the push rod 30 between the flat washer 33 and the flat cover 31 is sleeved with a tension spring 34, the push head of the lower end of the push rod 30 is pulled up to abut against the lower side hole edge of the central hole of the cylindrical slider 29 by the tension spring 34; the outer circumference of the cylindrical slider 29 is provided with a vertical strip-shaped groove 29.1 in each of the front, rear, left and right sides, the outer circumference of the cylindrical slider 29 is further provided with two ring-shaped grooves which are narrow and wide in the lower part, the upper ring-shaped groove is a cutter shaft accommodating groove 29.2, and the lower ring-shaped groove is a spring accommodating groove 29.3, one piece of blade 35 is installed in each of the strip-shaped grooves 29.1; the blade 35 is provided with a vertical blade body 35.1, the upper end of the vertical blade body 35.1 is provided with cutter shafts 35.2 which horizontally extend to both sides, the lower end of the vertical blade body 35.1 is connected with an inwardly converging inclined blade body 35.3, the end of the inclined blade body 35.3 is connected with a vertically downwardly extending blade head 35.4, and the lower end of the blade head 35.4 is provided with a cutting edge; the vertical blade bodies 35.1 of the four pieces of blade 35 are respectively movably embedded in the four strip-shaped grooves 29.1 of the cylindrical slider 29, the cutter shafts 35.2 are movably embedded in the cutter shaft accommodating groove 29.2 of the cylindrical slider 29, the inclined blade body 35.3 and the blade head 35.4 are located below the cylindrical slider 29, more than one ring-shaped holding spring 36 is arranged in the spring accommodating groove 29.3 of the cylindrical slider 29, the four pieces of blade 35 are inwardly retracted by the holding spring ring 36 which holds the outer sides of the vertical blade bodies 35.1 of the four pieces of blade 35, the blade heads 35.4 are combined together to form a ring-shaped cutting head when the four pieces of blade 35 are completely retracted, the push head of the push rod 30 is located directly above the funnel-shaped frame which is surrounded by the inclined blade bodies 35.3 of the four pieces of blade 35, and the lower hole of the vent hole 32.1 of the vent bolt 32 is located directly above the ring-shaped cutting head; the forceps head is freely placed on the sliding cylinder 27 of the forceps seat through the flat cover 31, the cylindrical slider 29 is sleeved on the inner part of the sliding cylinder 27 at a higher position, and the blade heads 35.4. The blade extends downward through the lower opening of the slide tube 27. The front and rear blades 35 have inwardly bent vertical side edges 35.5 on both sides of their cutting heads 35.4. When the four blades 35 are fully retracted, the cutting heads and side edges 35.5 of the front and rear blades 35 form a closed enclosure, with the cutting heads 35.4 of the left and right blades 35 closely surrounding the outer perimeter of the cutting heads and side edges 35.5 of the front and rear blades.

[0058] like Figures 1-5 As shown, the linkage mechanism is positioned centered above the upper shelf of the machine frame 1, supported by a bearing seat assembly, which elevates and rotatably supports a horizontally driven shaft 5. From left to right, the shaft of the driven shaft 5 is sequentially and fixedly connected to a left positioning cam 37, a core-removing cam 38, a double right positioning cam 39, a core-releasing cam 40, and a pneumatic valve lever 41, all rotating synchronously with the driven shaft 5. Above the positioning hole 13.1 of the corresponding core-removing station conveyor plate 13, the upper shelf is fitted with a left positioning rod assembly 42 via a guide hole, located directly above the corresponding turntable 2. Above the positioning through-holes 22.2 of the core removal and core release stations, right positioning rod assemblies 43 are respectively mounted through guide holes. The positioning rods 48 of the left positioning rod assembly 42, driven by the left positioning cam 37, are inserted downwards into the positioning holes 13.1 of the material conveyor plate 13 at the core removal station to position the material conveyor plate 13. The positioning rods 48 of the two right positioning rod assemblies 43, driven by the double right positioning cam 39, are respectively inserted downwards into the positioning through-holes 22.2 of the core removal and core release stations of the turntable 22 to position the turntable 22. Positioning: The upper shelf plate has a left elastic mandrel assembly 44 mounted through a guide hole directly above the corresponding de-core removal clamp 23 at the de-core removal station, and a right elastic mandrel assembly 45 mounted through a guide hole directly above the corresponding de-core release clamp 23 at the de-core release station. The de-core removal cam 38 drives the mandrel 54 of the left elastic mandrel assembly 44 to push the push rod 30 of the de-core removal clamp 23 downward to control the de-core removal clamp 23. The de-core release cam 40 drives the mandrel 54 of the right elastic mandrel assembly 45 to push the push rod of the de-core release clamp 23 downward. 30 and connects it to high-pressure air to control the denuclearizing clamp 23 at the nucleus release station; the upper shelf is equipped with a mechanical air valve 46 with a roller switch on one side of the corresponding air valve lever 41. The air inlet of the mechanical air valve 46 is connected to the external air supply, and the air outlet of the mechanical air valve 46 is connected to the air inlet of the right elastic mandrel assembly 45 through the air supply pipe 47. The opening and closing of the mechanical air valve 46 is controlled by the air valve lever 41, so that when the right elastic mandrel assembly 45 controls the denuclearizing clamp 23 at the nucleus release station to open, high-pressure air is provided to the right elastic mandrel assembly 45.

[0059] like Figures 20-21As shown, the left positioning rod assembly 42 and the right positioning rod assembly 43 adopt the same basic structure, and each is provided with a positioning rod 48 extending downward through the corresponding guide hole of the upper shelf plate and being slidable upward and downward, one side of the upper end of the positioning rod 48 being fixedly connected with a vertically upward extending rectangular frame sleeve 49, the frame sleeve 49 being movably sleeved on the outer periphery of the shaft body of the driven shaft 5, the upper end of the frame sleeve 49 being provided with a pulley, the upper end of the positioning rod 48 being further provided with a tension spring 50 on the front and rear sides and being connected with the upper shelf plate, the pulley at the upper end of the frame sleeve 49 being elastically abutted on the corresponding cam of the driven shaft 5 from the upper side by the tension spring 50, and the corresponding cam driving the positioning rod 48 to move upward and downward once per one rotation. Further, a guide sleeve 51 for guiding the rod body of the positioning rod 48 is further arranged below the upper shelf plate of the rack 1.

[0060] As shown in Figure 21 the lower end of the left positioning rod assembly 42 is further fixedly connected with a U-shaped blocking strip 52 extending horizontally and transversely to the right, the U-shaped blocking strip 52 crossing over the holding fruit hole 13.2 of the kernel removing work station feed plate 13, the opening of the U-shaped blocking strip 52 being larger than the cutter head of the kernel removing pliers 23 and smaller than the passageway of the holding fruit hole 13.2, and a limiting rod 53 extending upward being fixedly arranged on the middle shelf plate of the rack 1, the upper end of the limiting rod 53 being inserted into the opening of the right end of the U-shaped blocking strip 52, thereby limiting the rotation of the U-shaped blocking strip 52; the U-shaped blocking strip 52 can prevent the cutter head of the kernel removing pliers 23 from taking the longan shell and pulp out of the holding fruit hole 13.2 when the cutter head is retracting upward while clamping the longan kernel.

[0061] As shown in Figures 22-24 the left elastic top head assembly 44 and the right elastic top head assembly 45 adopt the same basic structure, and each is provided with a top head 54 extending downward through the corresponding guide hole of the upper shelf plate and being slidable upward and downward, the top head 54 being provided with a top head clamping bolt 55 at the upper position, one side of the upper end of the top head 54 being fixedly connected with a vertically upward extending rectangular frame 56, the rectangular frame 56 being movably sleeved on the outer periphery of the shaft body of the driven shaft 5, the upper end of the top head 54 being provided with a pulley, and the tension spring 57 being sleeved on the rod body of the top head 54 between the top head clamping bolt 55 and the upper shelf plate, the pulley at the upper end of the top head 54 being elastically abutted on the corresponding cam of the driven shaft 5 from the lower side by the tension spring 57, and the corresponding cam driving the top head 54 to move upward and downward once per one rotation; the right elastic top head assembly 45 is provided with a vertical blowing channel 54.1 penetrating into the top head 54 inside the top head 54, one end of the top head clamping bolt 55 serving as the air inlet of the right elastic top head assembly and being provided with an air passage communicating with the blowing channel 54.1, and a ring of sealing rubber pads 58 being arranged on the outer periphery of the air outlet of the blowing channel 54.1 at the lower end surface of the top head 54.

[0062] As shown in Figure 27As shown, the top meat mechanism is installed with a horizontal longitudinal sliding sleeve 60 below the lower layer shelf plate in the frame 1 through the lower support plate 59, the sliding sleeve 60 is sleeved with a horizontal longitudinal sliding rod 61, the rear end of the sliding rod 61 is provided with a pushing end 61.1 which faces the center of the supporting hole 13.2 of the material feeding plate 13 of the shell meat mechanism in the rear of the rear conveying mechanism, the front end of the sliding rod 61 is provided with a clamping frame 61.2, and a transverse return spring 62 is sleeved between the sliding sleeve 60 and the clamping frame 61.2 outside the sliding rod 61, so that the pushing end 61.1 of the sliding rod 61 is abutted against the rear end face of the sliding sleeve 60; the top meat mechanism is installed with a vertical upward and front and rear tilting swing swing rod 63 above the lower layer shelf plate in the frame 1, the swing rod 63 is located behind the driving shaft 2 of the driving mechanism, the upper end of the swing rod 63 is movably inserted into the clamping frame 61.2 of the sliding rod 61, the middle part of the swing rod 63 is provided with a forwardly extending supporting rod 63.1, the end of the supporting rod 63.1 is provided with a pulley and abutted against the lower cam 7 on the driving shaft 2 from the rear side through the pulley, and the lower cam 7 rotates one circle to drive the swing rod 63 to swing once, and then the swing rod 63 is pushed by the swing rod 63 to push the sliding rod 61 once.

[0063] The working process of the longan core removing machine is as follows:

[0064] (1) The operator manually puts the longan to be cored in the supporting hole 13.2 of the material feeding plate 13 behind the cored position with the fruit stem upwards, and starts the speed reducer motor 3, so that the driving mechanism of the machine drives the conveying mechanism, the core pushing mechanism, the core removing mechanism, the linkage mechanism and the top meat mechanism to work synchronously in a mechanical linkage mode.

[0065] (2) The left push rod 7 on the driving shaft 2 rotates one circle to drive the vertical star-shaped wheel 12 to rotate one tooth position intermittently, and then drive the conveying chain ring 12 to walk one displacement of the material feeding plate 13 from front to back; the right push rod 8 on the driving shaft 2 rotates one circle to drive the horizontal star-shaped wheel 24 to rotate one tooth position intermittently, and then drive the rotating disc 22 to rotate one displacement of the core removing clamp 23 clockwise (from top to bottom).

[0066] (3) When the material feeding plate 13 with the longan walks to the cored position, the left positioning cam 37 drives the positioning rod 48 of the left positioning rod assembly 42 to insert into the positioning hole 13.1 of the material feeding plate 13 of the cored position to position the material feeding plate 13; at the same time, the double right positioning cam 39 drives the positioning rods 48 of the two right positioning rod assemblies 43 to respectively insert into the positioning through hole 22.2 of the core removing clamp 23 of the rotating disc 22 cored position and the core releasing position to position the rotating disc 22.

[0067] (4), the left elastic top head assembly 44 of the core removal cam 38 drives the top head 54 to push the push rod 30 of the core removal station pitting clamp 23 downward to control the core removal station pitting clamp 23. When the push rod 30 of the core removal station pitting clamp 23 moves downward, the four-blade cutter 35 moves downward together with the cylindrical slider 29 first, until the cylindrical slider 29 abuts against the stopper of the lower cylinder of the slide cylinder 27, at this time, the four-blade cutter 35 is completely closed under the action of the embracing spring 36, the cutter head 35.4 penetrates into the longan fruit stem a certain depth in the form of a ring-shaped cutting head, then the push rod 30 continues to move downward and presses on the funnel-shaped frame surrounded by the inclined cutter body 35.3 of the four-blade cutter 35, so that the cutter head 35.4 of the four-blade cutter 35 opens to a certain extent, the fruit pulp connected around the fruit stem is separated by the opened cutter head 35.4, and the fruit stem and the fruit pulp are completely separated. Since the four-blade cutter design is designed to penetrate first and then open, as long as the cutter head size is designed according to the size of the smaller fruit stem, it can match various sizes of fruit. At the same time that the cutter head 35.4 of the four-blade cutter 35 opens, the lower cam 7 drives the stepped top rod 17 of the core removal mechanism to move upward, the fine needle rod 17.1 of the stepped top rod 17 penetrates through the shell and pulp from below the longan and pushes the longan core upward, then the push rod 30 moves upward, the cutter head 35.4 of the four-blade cutter 35 is closed under the action of the embracing spring 36, the pushed longan core is clamped on the cutter head 35.4 and moves upward together with the cylindrical slider 29.

[0068] (5), the longan after the core removal continues to move backward with the feeding plate 13, the lower cam 7 drives the stepped top rod 17 of the core removal mechanism to move upward at the same time, and also drives the swing rod 63 of the shell pulp removal mechanism to swing backward, so that the top pushing end 61.1 of the slide rod 61 pushes backward, and the longan shell and pulp on the feeding plate 13 of the shell pulp removal station are pushed out of the fruit holding hole 13.2 and fall into the lower collection, and then are sent to the next process for shell pulp separation treatment.

[0069] (6), after the core removal station pitting clamp 23 holding the longan core rotates to the core releasing station, the core releasing cam 40 drives the top head 54 of the right elastic top head assembly 45 to push the push rod 30 of the core releasing station pitting clamp 23 downward and connects high-pressure air to control the core releasing station pitting clamp 23, when the push rod 30 of the core releasing station pitting clamp 23 moves downward, the cutter head 35.4 of the four-blade cutter 35 opens, at the same time, the air blowing channel 54.1 of the right elastic top head assembly 45 is connected with the air hole 32.1 of the push rod 30, high-pressure air blown out of the air blowing channel 54.1 blows the clamped core downward through the air hole 32.1 of the push rod 30, and the blown core falls into the core discharging chute 25 below and is discharged outward.

[0070] The above examples are only typical embodiments of the present application, and are not used to limit the present application, any modification or equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A single motor driven mechanical linkage longan pitting machine, characterized in that: The longan core removing machine is provided with a rack with upper, middle and lower rack plates, a main power mechanism, a conveying mechanism, a core lifting mechanism, a core removing mechanism, a linkage mechanism and a shell meat lifting mechanism are arranged on the rack; The main power mechanism is provided with a horizontal transverse main shaft supported by a bearing seat assembly at the middle of the lower rack plate of the rack, the right end of the main shaft is connected with a speed reducer motor through a coupling, the main shaft is driven by the speed reducer motor, the left end of the main shaft is connected with a driven shaft of the linkage mechanism through a vertically arranged chain transmission assembly, so that the driven shaft rotates synchronously with the main shaft, the shaft body of the main shaft is sequentially connected with a left lever, a lower cam and a right lever which rotate synchronously with the main shaft from left to right; The conveying mechanism is provided with two vertically arranged conveying chains arranged in parallel and at intervals on the left side of the middle and lower rack plates of the rack, the two conveying chains are driven and synchronously moved by coaxial double-row driving sprockets arranged at the front end of the lower rack plate, the rear end of the lower rack plate and the front and rear ends of the middle rack plate are respectively provided with driven sprockets for supporting the conveying chains, the shaft of the driving sprocket extends to the left and is connected with a vertical star wheel, the vertical star wheel is located in front of the main shaft of the main power mechanism and corresponds to the left lever on the main shaft, the left lever drives the vertical star wheel to intermittently rotate one tooth position per revolution, and the driving sprocket rotates synchronously with the vertical star wheel, a group of material conveying plates are fixedly arranged across the conveying chains and are uniformly distributed along the outer edges of the conveying chains, the material conveying plates move synchronously with the conveying chains, the vertical star wheel drives the conveying chains to move one displacement of the material conveying plate per revolution, the material conveying plate is located directly above the main shaft as a core removing station, and the material conveying plate is located at the uppermost end in the rear as a shell meat removing station, a positioning hole and a fruit supporting hole are arranged on the material conveying plate; The core lifting mechanism is provided with a core lifting hole in the lower rack plate of the rack, a vertical sleeve is arranged below the core lifting hole, a stepped ejector rod which can slide up and down is arranged in the sleeve, the upper part of the stepped ejector rod is a thin needle rod for ejecting the core, the upper end of the thin needle rod extends upward through the opening in the top surface of the sleeve and the core lifting hole in the lower rack plate of the rack and is located opposite to the center of the fruit supporting hole of the material conveying plate in the core removing station of the conveying mechanism, the lower part of the stepped ejector rod is a lifting column, the upper end of the lifting column is slidably inserted into the sleeve, a lifting column clamping bolt is arranged in the lifting column in a transverse direction, a vertical return spring is arranged between the lifting column clamping bolt and the lower end surface of the sleeve, the lower end of the lifting column is provided with a pulley which abuts against the lower cam on the main shaft of the main power mechanism from the upper side, the lower cam drives the stepped ejector rod to move up and down once per revolution, one end of the lifting column clamping bolt is further connected with a downward extending limiting fork, and the limiting fork is clamped on the main shaft. The de-nucleating mechanism is rotatably supported by a bearing seat assembly at a position right of the middle layer shelf plate in the frame, and has a vertical rotating shaft penetrating the middle layer shelf plate, the upper end of the vertical rotating shaft penetrating above the upper layer shelf plate, and a horizontal rotating disc being fixedly sleeved to the middle part of the vertical rotating shaft above the middle layer shelf plate and higher than the conveying mechanism, the rotating disc being provided with a circle of installation holes uniformly distributed along the circumferential direction of the disc surface, each installation hole being provided with a de-nucleating clamp, the rotating disc being further provided with a circle of positioning through holes at the inner side of the circle of installation holes, each positioning through hole corresponding to a de-nucleating clamp, the lower end of the vertical rotating shaft being fixedly connected with a horizontal star-shaped wheel below the middle layer shelf plate, the number of teeth of the horizontal star-shaped wheel being equal to the number of de-nucleating clamps on the rotating disc and being even, the horizontal star-shaped wheel being located above the driving shaft of the driving mechanism and corresponding to the right shifting lever on the driving shaft, the right shifting lever driving the horizontal star-shaped wheel to intermittently rotate one tooth position per rotation, the rotating disc synchronously rotating with the horizontal star-shaped wheel, the horizontal star-shaped wheel driving the rotating disc to rotate the displacement of one de-nucleating clamp per rotation, the de-nucleating clamp on the rotating disc being located at the left position as a de-nucleating station, the center of the de-nucleating clamp on the de-nucleating station being opposite to the center of the fruit supporting hole of the de-nucleating station fruit conveying plate below, the de-nucleating clamp on the rotating disc being located at the right position as a de-nucleating station; The linkage mechanism is rotatably supported by a bearing seat assembly at a position above the upper layer shelf plate in the frame, and has a horizontal transverse driven shaft, the shaft body of the driven shaft being fixedly connected with, from left to right, a left positioning cam, a de-nucleating cam, a double right positioning cam, a de-nucleating cam, and a valve shifting lever, the left positioning lever assembly being arranged above the positioning hole of the de-nucleating station fruit conveying plate through a guide hole, the right positioning lever assembly being arranged above the positioning through hole of the de-nucleating station de-nucleating clamp through a guide hole, the left elastic top head assembly being arranged above the de-nucleating station de-nucleating clamp through a guide hole, the right elastic top head assembly being arranged above the de-nucleating station de-nucleating clamp through a guide hole, the mechanical valve with a roller switch being arranged on one side of the de-nucleating station through a guide hole, the air inlet of the mechanical valve being connected with an external air supply, and the air outlet of the mechanical valve being connected with the air inlet of the right elastic top head assembly through a gas conveying pipe; The top shell meat mechanism is installed with a horizontal longitudinal sliding sleeve below the middle layer shelf plate in the frame through a lower support plate, the horizontal longitudinal sliding sleeve being slidably sleeved with a horizontal longitudinal sliding rod, the rear end of the sliding rod being provided with a pushing end, the pushing end being opposite to the center of the fruit supporting hole of the de-nucleating station fruit conveying plate of the conveying mechanism, the front end of the sliding rod being provided with a clamping frame, a transverse return spring being sleeved between the sliding sleeve and the clamping frame on the outside of the sliding rod, so that the pushing end of the sliding rod is abutted against the rear end surface of the sliding sleeve, the top shell meat mechanism being installed with a vertically upward extending and forward and backward tilting swing lever above the lower layer shelf plate in the frame, the swing lever being located behind the driving shaft of the driving mechanism, the upper end of the swing lever being movably inserted into the clamping frame of the sliding rod, the middle part of the swing lever being provided with a forward extending support rod, the end of the support rod being provided with a pulley and being abutted against the lower cam on the driving shaft from the rear side through the pulley, the lower cam driving the swing lever to swing backward once per rotation, and the swing lever driving the sliding rod to push backward once per rotation. The de-nucleating forceps are provided with a forceps seat and a forceps head; the forceps seat is provided with a vertical sliding cylinder penetrating through the forceps seat from top to bottom, the lower cylinder opening of the sliding cylinder is provided with a circle of inwardly retracted blocking edges, the outer side of the sliding cylinder is connected with a locking nut through external threads, the lower end of the outer side of the sliding cylinder is provided with an outwardly spread protruding edge; the forceps head is provided with a cylindrical slider which is matched with the sliding cylinder of the forceps seat and can slide up and down in the sliding cylinder, the cylindrical slider is provided with a central hole, a push rod is sleeved in the central hole in sliding mode, the lower end of the push rod is provided with a push head which is larger than the diameter of the central hole of the cylindrical slider, the center of the push rod is provided with a through-thread hole, a flat cover with a central hole is placed on the top surface of the cylindrical slider, the upper end of the push rod is upwardly inserted through the central hole of the cylindrical slider and the central hole of the flat cover and then outwardly extends from the top surface of the flat cover, a vent screw is connected in the through-thread hole of the push rod, the screw head of the vent screw is pressed on the upper end surface of the push rod through a flat washer, the lower end of the vent screw extends downwardly from the push head of the push rod by a distance, the center of the vent screw is provided with a through vent hole, a tension spring is sleeved on the rod body of the push rod between the flat washer and the flat cover, the lower end of the push rod is pulled upwardly by the tension spring to abut against the lower side hole edge of the central hole of the cylindrical slider; the outer side circumference of the cylindrical slider is provided with a vertical strip-shaped groove on each of the front, rear, left and right sides, the outer side circumference of the cylindrical slider is further provided with two ring-shaped grooves with different widths on the lower part, the upper ring-shaped groove is a cutter shaft accommodating groove, the lower ring-shaped groove is a spring accommodating groove, one piece of blade is installed in each of the strip-shaped grooves; the blade is provided with a vertical blade body, the upper end of the vertical blade body is provided with cutter shafts which horizontally extend to both sides, the lower end of the vertical blade body is connected with an inwardly gathered inclined blade body, the end of the inclined blade body is connected with a vertically downwardly extending blade head, the lower end of the blade head is provided with a cutting edge; the vertical blade bodies of the four pieces of blade are respectively movably embedded in the four strip-shaped grooves of the cylindrical slider, the cutter shafts are movably embedded in the cutter shaft accommodating groove of the cylindrical slider, the inclined blade body and the blade head are located below the cylindrical slider, one or more than one ring-shaped holding spring is arranged in the spring accommodating groove of the cylindrical slider, the holding spring holds the four pieces of blade on the outside of the vertical blade bodies of the four pieces of blade to make the four pieces of blade inwardly retract, the blade heads of the four pieces of blade are combined together to form a ring-shaped cutting head when the four pieces of blade are completely retracted, the push head of the push rod is located directly above the funnel-shaped frame formed by the inclined blade bodies of the four pieces of blade, the lower opening of the vent hole of the vent screw is located directly above the ring-shaped cutting head; the forceps head is freely placed on the sliding cylinder of the forceps seat through the flat cover, the cylindrical slider is sleeved on the upper part of the sliding cylinder, the blade heads of the four pieces of blade extend downwardly through the lower cylinder opening of the sliding cylinder. The blade heads of the front and rear blades of the four pieces of blade are provided with inwardly bent vertical side edges on the left and right sides, the blade head side edges of the front and rear blades form a surrounding when the four pieces of blade are completely retracted, the blade heads of the left and right blades are surrounded by the blade head side edges of the front and rear blades. The machine frame is provided with a nuclear discharging chute below the de-nucleating forceps at the corresponding de-nucleating position, the nuclear discharging chute is used for receiving the falling longan kernels and discharging the longan kernels to one side.

2. The single-motor-driven mechanically linked longan pitting machine according to claim 1, characterized in that: The left positioning rod assembly and the right positioning rod assembly adopt the same basic structure, and each is provided with a positioning rod which is downwardly extended through a corresponding guide hole of the upper layer frame plate and is capable of upward and downward sliding, a rectangular frame which is fixedly connected to one side of the upper end of the positioning rod and is vertically upwardly extended, the rectangular frame is movably sleeved on the outer periphery of the shaft body of the driven shaft, the upper end of the frame is provided with a pulley, the upper end of the positioning rod is further provided with a tension spring which is connected to the upper layer frame plate on the front and back sides, the pulley at the upper end of the frame is elastically abutted on the corresponding cam of the driven shaft from the upper side by the tension spring, and the corresponding cam drives the positioning rod to move up and down once per one rotation.

3. The single-motor-driven mechanically linked longan pitting machine according to claim 2, characterized in that: A U-shaped blocking strip which is horizontally and transversely extended to the right is further fixedly connected to the upper end of the left positioning rod assembly, the U-shaped blocking strip is across the upper part of the supporting fruit hole of the nuclear station material conveying plate, the opening of the U-shaped blocking strip is larger than the cutter head of the nuclear pincer and is smaller than the passageway of the supporting fruit hole, a limiting rod which is upwardly extended is fixedly arranged on the middle layer frame plate of the frame, and the upper end of the limiting rod is inserted into the opening of the right end of the U-shaped blocking strip.

4. The single-motor-driven mechanically linked longan pitting machine according to claim 1, characterized in that: The left elastic top head assembly and the right elastic top head assembly adopt the same basic structure, and each is provided with a top head which is downwardly extended through a corresponding guide hole of the upper layer frame plate and is capable of upward and downward sliding, a top head clamping bolt which is longitudinally arranged at the upper part of the top head, a rectangular frame which is fixedly connected to one side of the upper end of the top head and is vertically upwardly extended, the rectangular frame is movably sleeved on the outer periphery of the shaft body of the driven shaft, the upper end of the top head is provided with a pulley, and a tension spring is sleeved on the rod body of the top head between the top head clamping bolt and the upper layer frame plate, the pulley at the upper end of the top head is elastically abutted on the corresponding cam of the driven shaft from the lower side by the tension spring, and the corresponding cam drives the top head to move up and down once per one rotation; the right elastic top head assembly is provided with a vertical air blowing channel which penetrates into the lower end surface of the top head inside the top head, one end of the top head clamping bolt is used as the air inlet of the right elastic top head assembly and is provided with an air passage which is communicated with the air blowing channel, and a ring of sealing rubber pads is arranged on the outer periphery of the air outlet hole of the air blowing channel at the lower end surface of the top head.

5. The single motor driven mechanically linked longan pitting machine according to claim 1, characterized in that: The material conveying plate of the conveying mechanism is fixedly connected to the curved plates on the sides of the two conveying chain rings through the bolts on the left and right sides, and the material conveying plate is composed of the upper pressing plate, the middle plate and the lower supporting plate which are stacked one above another; the right end of the lower supporting plate is provided with a lower bottom hole, the left and right ends of the middle plate are respectively provided with a positioning middle hole and a bracket mounting hole, the bracket mounting hole is axially aligned with the lower bottom hole, the diameter of the bracket mounting hole is larger than that of the lower bottom hole, a stainless steel fruit supporting frame is embedded in the bracket mounting hole, the fruit supporting frame is provided with a cylindrical wall which is matched with the bracket mounting hole, the upper edge of the cylindrical wall is provided with a plurality of arc-shaped supporting pieces which are downwardly bent to the inner side of the cylindrical wall, and the plurality of arc-shaped supporting pieces jointly form an elastic supporting bucket, the left and right ends of the upper pressing plate are respectively provided with a positioning upper hole and an upper pressing hole, the positioning upper hole is axially aligned with the positioning middle hole and has the same diameter, and the upper pressing hole is axially aligned with the bracket mounting hole and has a smaller diameter than that of the bracket mounting hole, the positioning upper hole and the positioning middle hole jointly form the positioning hole of the material conveying plate, and the upper pressing hole, the fruit supporting frame and the lower bottom hole jointly form the supporting fruit hole of the material conveying plate.

6. The single motor driven mechanically linked longan pitting machine according to claim 1, characterized in that: The top surface of the middle shelf plate in the frame is provided with a longitudinal support bracket to prevent the downward falling of the feeding plate during the feeding process, and the feeding plate is supported by a pulley on the support bracket.

7. The single motor driven mechanically linked longan pitting machine according to claim 1, characterized in that: A lower tray is further arranged below the rotating disc, and the lower tray is fixedly installed above the middle shelf plate of the frame through supporting legs. A center opening is arranged at the center of the lower tray to allow the vertical rotating shaft to pass through, and the bottom surface of the rotating disc is supported by the top surface of the lower tray.

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