A precision grading device for macadamia nut shells

Abstract

The utility model discloses a kind of macadamia nut shell fruit precision grading devices, it is related to nut grading technical field, the macadamia nut shell fruit precision grading device includes the U-shaped guide frame of inclination arrangement, and U-shaped guide frame is provided with screening roller in rectangular array, and, every described screening roller is all opened with classification hole in annular array;The one end of the U-shaped guide frame is further equipped with lifting support, and the inner side of lifting support is further movably connected with vertical feeder;The utility model is vertically arranged on the side of feed inlet Setting lifting mechanism, by the thread cooperation between screw lifting rod and side limit seat, vertical lifting is carried out to macadamia nut inside the hollow hopper, it can not only prevent macadamia nut from rolling, but also can be poured into a large amount of macadamia nut for grading at a time, and vertically arranged lifting mechanism is less to space occupation, more convenient to operate.

Description

Technical Field

[0001] This utility model specifically relates to the field of nut grading technology, and more specifically to a device for precise grading of macadamia nut shells. Background Technology

[0002] Macadamia nuts are the fruit of an evergreen tree belonging to the genus Macadamia in the family Proteaceae. They are also called Hawaiian nuts. Due to the growing environment, cultivation management, and physiological changes during fruit development, macadamia nuts vary in size after harvesting. In order to ensure their quality, achieve standardized sales, and enhance the value of the industry, macadamia nuts are generally graded according to their size, weight, and other conditions. Inferior fruits can also be removed through grading.

[0003] Currently, most macadamia nuts are graded using a rotary drum grading machine. The surface of the drum in the rotary drum grading machine has holes of different diameters. As the drum rotates, nuts smaller than the hole diameter fall through the holes, thus achieving size separation.

[0004] However, in practice, it has been noted that most macadamia nut grading machines currently have their feed inlets located at the top of the machine. Due to the height of the grading machine, the feed inlet is generally at the worker's chest level. Therefore, when feeding, it is necessary to manually move the collection box containing macadamia nuts to one side of the feed inlet, and then pour the macadamia nuts inside into the grading machine through the feed inlet. This results in high labor intensity and low efficiency when manually feeding.

[0005] Some grading machines have an inclined material elevator at the feeding position to lift the macadamia nuts at the bottom using mechanical force. Since macadamia nuts are generally spherical, they are prone to rolling off the conveyor structure during the lifting process, resulting in low feeding efficiency. In addition, the inclined material elevator occupies a large space and is widely used. Utility Model Content

[0006] The purpose of this invention is to provide a precise grading device for macadamia nuts. A vertically positioned lifting mechanism is installed on one side of the feed inlet. Through the threaded engagement between a threaded lifting rod and a side limiting seat, the macadamia nuts inside the hollow hopper are vertically lifted. This prevents the macadamia nuts from rolling off and allows for the simultaneous loading and grading of large quantities of nuts. Furthermore, the vertically positioned lifting mechanism occupies less space and is easier to operate. This invention aims to solve the technical problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A precise grading device for macadamia nut shells includes an inclined U-shaped guide frame, on which screening rollers are arranged in a rectangular array, and each screening roller has grading holes arranged in a ring array.

[0009] The U-shaped guide frame is also provided with a lifting bracket at one end, and a vertical feeder is movably connected to the inner side of the lifting bracket. The lifting bracket includes a fixed base and a top frame arranged symmetrically, and the fixed base and the top frame are fixedly connected in a rectangular array with limit support rods.

[0010] Both ends of the fixed base are movably connected with threaded lifting rods, and the ends of the threaded lifting rods pass through the top frame and are driven by a lifting motor fixedly connected above the top frame.

[0011] As a further technical solution of this utility model, the vertical feeder includes a hollow hopper located between the fixed base and the top frame. Both ends of the hollow hopper are fixedly connected to side limiting seats, and a material blocking gate is movably connected to the side of the hollow hopper near the U-shaped guide frame.

[0012] As a further technical solution of this utility model, each of the side limiting seats is movably connected with a limiting sliding hole, and the limiting support rod passes through the limiting sliding hole;

[0013] The side limiting seat is also provided with a threaded hole, and the threaded lifting rod is engaged with the inner thread of the threaded hole.

[0014] As a further technical solution of this utility model, both ends of the material gate are integrally provided with end shafts, and both ends of the top frame are fixedly connected with material gate openers and closers corresponding to the end shafts.

[0015] As a further technical solution of this utility model, the material gate opener and closer includes an extended vertical rod fixedly connected to the bottom of the top frame, and an inclined stop block is integrally provided at the other end of the extended vertical rod. A rotating rocker arm that is movably connected to the extended vertical rod is also provided above the inclined stop block.

[0016] The rotating rocker arm has an arc-shaped groove located above the end shaft at the end away from the tilting block.

[0017] As a further technical solution of this utility model, the hollow hopper is inclined downward on the side near the material gate, and the side of the hollow hopper away from the material gate is fixedly connected with support columns in a rectangular array, and the bottom of the support columns is in contact with the fixed base.

[0018] As a further technical solution of this utility model, the bottom of the U-shaped guide frame is also fixedly connected to a bottom frame, and both ends of the screening roller are movably connected to the bottom frame.

[0019] The bottom frame is also fixedly connected to a grading guide plate corresponding to the screening roller, and one end of the grading guide plate extends to the inside of the screening roller.

[0020] As a further technical solution of this utility model, a sprocket is fixedly connected to the end of the screening roller away from the grading guide plate, and a transmission chain is connected between two adjacent sprockets. A transmission pulley is also fixedly connected to the end of the screening roller away from the lifting bracket.

[0021] A drive motor is also fixedly connected to the side of the bottom frame, and a transmission pulley is also fixedly connected to the end of the drive motor. A transmission belt is used to drive the two transmission pulleys.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. In this utility model, the lifting motor drives the threaded lifting rod to rotate. Through the threaded engagement of the threaded lifting rod and the threaded hole on the side limit seat, the hollow hopper is vertically lifted, thereby vertically feeding the macadamia nuts inside the hollow hopper. This can reduce the space occupied by the feeding structure, prevent the macadamia nuts from rolling off during the feeding process, and make the discharge smoother due to the inclined bottom of the hollow hopper.

[0024] 2. In this utility model, when the hollow hopper rises to a certain height, the arc-shaped groove below the rotating rocker will cooperate with the support columns at both ends of the material blocking gate. As the hollow hopper continues to rise, due to the inclined setting of the rotating rocker, the end of the rocker will rotate upward under force, thereby pushing the bottom of the material blocking gate to rotate away from the hollow hopper. This causes the macadamia nuts inside the hollow hopper to roll out from the gap to the end of the U-shaped guide frame, automatically opening the material blocking gate.

[0025] 3. In this utility model, according to the required feeding speed, the limiting screw on the side of the insertion baffle is loosened, and the limiting screw is threaded to the threaded adjustment hole at different positions. The position of the insertion baffle is limited by the limiting screw, thereby adjusting the distance between the bottom of the insertion baffle and the U-shaped guide frame. By controlling the size of the distance, the throughput of macadamia nuts is controlled, thereby controlling the feeding speed during grading. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model in use.

[0027] Figure 2 This utility model Figure 1 Another perspective view.

[0028] Figure 3 This utility model Figure 2 Enlarged schematic diagram of part A.

[0029] Figure 4 This utility model Figure 1 A partial structural diagram.

[0030] Figure 5 This utility model Figure 4 Enlarged schematic diagram of part B.

[0031] Figure 6 This is a three-dimensional structural diagram of the material gate opener / closer of this utility model.

[0032] Figure 7 This utility model Figure 6 Rear view.

[0033] Figure 8 This is a three-dimensional structural diagram of the vertical feeder in this utility model.

[0034] Figure 9 This utility model Figure 8 A schematic diagram of the bottom structure.

[0035] Figure 10 This utility model Figure 9 Enlarged schematic diagram of part C.

[0036] In the picture:

[0037] U-shaped guide frame-1, bottom frame-2, drive motor-3, screening roller-4, grading hole-5, limit baffle-6, material discharge speed limit plate-7, plug-in baffle-71, threaded adjustment hole-72, limit screw-73, lifting bracket-8, fixed base-81, top frame-82, limit support rod-83, threaded lifting rod-84, vertical feeder-9, hollow hopper-91, side limit seat-92, limit sliding hole-93, threaded hole-94, material gate-95, support column-96, end shaft-97, material gate opener-10, extension vertical rod-101, rotating rocker-102, arc-shaped slot-103, tilting block-104, lifting motor-11, grading guide plate-12. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figure 1-10This utility model provides a precise grading device for macadamia nut shells, including an inclined U-shaped guide frame 1, on which screening rollers 4 are arranged in a rectangular array, and each of the screening rollers 4 is provided with grading holes 5 in a ring array.

[0040] One end of the U-shaped guide frame 1 is also provided with a lifting bracket 8, and the inner side of the lifting bracket 8 is also movably connected with a vertical feeder 9. The lifting bracket 8 includes a fixed base 81 and a top frame 82 arranged symmetrically, and the fixed base 81 and the top frame 82 are fixedly connected in a rectangular array with a limit support rod 83.

[0041] Both ends of the fixed base 81 are movably connected to threaded lifting rods 84, and the ends of the threaded lifting rods 84 pass through the top frame 82 and are in transmission cooperation with the lifting motor 11 fixedly connected above the top frame 82.

[0042] Furthermore, the vertical feeder 9 includes a hollow hopper 91 located between the fixed base 81 and the top frame 82. Both ends of the hollow hopper 91 are fixedly connected to side limiting seats 92, and the side of the hollow hopper 91 near the U-shaped guide frame 1 is movably connected to a material blocking gate 95.

[0043] By adopting the above technical solution, the lifting motor 11 drives the threaded lifting rod 84 to rotate. Through the threaded engagement of the threaded lifting rod 84 and the threaded hole 94 on the side limit seat 92, the hollow hopper 91 is vertically lifted, thereby vertically feeding the macadamia nuts inside the hollow hopper 91. This not only reduces the space occupied by the feeding structure, but also prevents the macadamia nuts from rolling off during the feeding process. Furthermore, due to the inclined bottom of the hollow hopper 91, the discharge is smoother.

[0044] More specifically, each of the side limiting seats 92 is movably connected to a limiting sliding hole 93, and the limiting support rod 83 passes through the limiting sliding hole 93;

[0045] The side limiting seat 92 is also provided with a threaded hole 94, and the threaded lifting rod 84 is engaged with the inner thread of the threaded hole 94.

[0046] Furthermore, both ends of the material gate 95 are integrally provided with end shafts 97, and both ends of the top frame 82 are fixedly connected with gate openers 10 corresponding to the end shafts 97.

[0047] Furthermore, the material gate opener 10 includes an extension vertical rod 101 fixedly connected to the bottom of the top frame 82, and the other end of the extension vertical rod 101 is integrally provided with an inclined stop 104. Above the inclined stop 104, there is also a rotating rocker 102 movably connected to the extension vertical rod 101.

[0048] The rotating rocker arm 102 has an arc-shaped groove 103 located above the end shaft 97 at the end away from the tilting block 104.

[0049] Furthermore, the hollow hopper 91 is inclined downward on the side near the material gate 95, and the side of the hollow hopper 91 away from the material gate 95 is fixedly connected with support columns 96 in a rectangular array, and the bottom of the support columns 96 is in contact with the fixed base.

[0050] By adopting the above technical solution, when the hollow hopper 91 rises to a certain height, the arc-shaped slot 103 below the rotating rocker 102 will cooperate with the support columns 96 at both ends of the material blocking gate 95. The hollow hopper 91 continues to rise. Since the rotating rocker 102 is set at an angle, the end of the rocker will rotate upward after being subjected to force, thereby pushing the bottom of the material blocking gate 95 to rotate away from the hollow hopper 91. This causes the macadamia nuts inside the hollow hopper 91 to roll down from the gap to the end of the U-shaped guide frame 1, automatically opening the material blocking gate 95.

[0051] Furthermore, the bottom of the U-shaped guide frame 1 is also fixedly connected to the bottom frame 2, and both ends of the screening roller 4 are movably connected to the bottom frame 2.

[0052] The bottom frame 2 is also fixedly connected to a grading guide plate 12 corresponding to the screening roller 4 on one side, and one end of the grading guide plate 12 extends to the inside of the screening roller 4.

[0053] More specifically, the end of the screening roller 4 away from the grading guide plate 12 is fixedly connected to a sprocket, and a transmission chain is connected between two adjacent sprockets. The end of the screening roller 4 away from the lifting bracket 8 is also fixedly connected to a transmission pulley.

[0054] The bottom frame 2 is also fixedly connected to a drive motor 3 on its side, and the end of the drive motor 3 is also fixedly connected to a transmission pulley, and a transmission belt is used to drive the two transmission pulleys together.

[0055] Furthermore, through the transmission engagement between the transmission belt and the transmission pulley, the drive motor 3 drives the screening roller 4 to rotate, and through the mutual meshing between the transmission chain and the sprocket, all the screening rollers 4 rotate synchronously.

[0056] Furthermore, the diameter of the grading holes 5 on all the screening rollers 4 increases sequentially from left to right, and the U-shaped guide frame 1 is symmetrically fixedly connected to the two sides of the limit baffle 6, and the inner side of the limit baffle 6 is slidably fitted with the material dropping speed limiting plate 7.

[0057] Furthermore, the material discharge speed limiter 7 includes a plug-in baffle 71, and both ends of the plug-in baffle 71 are provided with threaded adjustment holes 72 in a rectangular array, and both ends of the plug-in baffle 71 are provided with limit screws 73 that are threadedly engaged with the threaded adjustment holes 72.

[0058] By adopting the above technical solution, according to the required feeding speed, the limiting screw 73 on the side of the insertion baffle 71 is loosened, and the limiting screw 73 is threaded to the threaded adjustment hole 72 at different positions. The position of the insertion baffle 71 is limited by the limiting screw 73, thereby adjusting the distance between the bottom of the insertion baffle 71 and the U-shaped guide frame 1. By controlling the size of the distance, the throughput of macadamia nuts is controlled, thereby controlling the feeding speed during grading.

[0059] More specifically, the inner side of the screening roller 4 is hollow, and the grading holes 5 are connected to the inner side of the screening roller 4. After the macadamia nuts pass through the grading holes 5 and enter the inner side of the screening roller 4, they move to the inner side of the grading guide plate 12 as the screening roller 4 rolls. They then fall into the collection box that has been placed in advance at the end of the grading guide plate 12 under the guidance of the grading guide plate 12.

[0060] The working principle of this utility model is as follows: First, macadamia nuts are poured into the hollow hopper 91 located at the bottom. Then, the lifting motor 11 drives the threaded lifting rod 84 to rotate. Through the threaded engagement between the threaded lifting rod 84 and the threaded hole 94, the hollow hopper 91 moves vertically upward. When the hollow hopper 91 moves above one end of the U-shaped guide frame 1, the end of the rotating rocker 102, which is inclined below the extended vertical rod 101, contacts the support columns 96 at both ends of the material gate 95. As the hollow hopper 91 continues to move upward, the end of the rotating rocker 102 rotates upward, thereby pushing the bottom of the material gate 95 upward. The macadamia nuts inside the hollow hopper 91 roll down through the gaps and fall into the end of the U-shaped guide frame 1. Then, the limit screw is adjusted in advance according to the discharge speed. The position of the nail 73 at the end of the insertion baffle 71 adjusts the distance between the insertion baffle 71 and the U-shaped guide frame 1. Macadamia nuts roll along the inclined direction of the U-shaped guide frame 1 and come into contact with the screening roller 4. When the size of the macadamia nut is large enough to pass through the grading holes 5 on the screening roller 4, the shelled nut will fall through the grading holes 5 onto the grading guide plate 12 extending to the inside of the screening roller 4. It is then graded by the guidance of the grading guide plate 12. When the diameter of the shelled nut is insufficient to pass through the grading holes 5, the rotating screening roller 4 drives the shelled nut to roll over the screening roller 4 to the other side through the grading holes 5, and then comes into contact with the next screening roller 4. The shelled nut of macadamia nuts is graded through the grading holes 5 of different diameters on multiple screening rollers 4. The structure is simple, the operation is very convenient, and it effectively reduces the intensity of manual labor.

[0061] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0062] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for precise grading of macadamia nut shells, characterized in that: It includes an inclined U-shaped guide frame (1), and the U-shaped guide frame (1) is provided with screening rollers (4) in a rectangular array, and each of the screening rollers (4) is provided with grading holes (5) in a ring array. The U-shaped guide frame (1) is also provided with a lifting bracket (8) at one end. The inner side of the lifting bracket (8) is also movably connected with a vertical feeder (9). The lifting bracket (8) includes a fixed base (81) and a top frame (82) arranged symmetrically. The fixed base (81) and the top frame (82) are fixedly connected in a rectangular array with a limit support rod (83). Both ends of the fixed base (81) are movably connected with threaded lifting rods (84), and the ends of the threaded lifting rods (84) pass through the top frame (82) and are in transmission cooperation with the lifting motor (11) fixedly connected above the top frame (82).

2. The precise grading device for macadamia nut shells according to claim 1, characterized in that: The vertical feeder (9) includes a hollow hopper (91) located between a fixed base (81) and a top frame (82). Both ends of the hollow hopper (91) are fixedly connected to side limit seats (92), and a material gate (95) is movably connected to the side of the hollow hopper (91) near the U-shaped guide frame (1).

3. The precise grading device for macadamia nut shells according to claim 2, characterized in that: Each of the aforementioned side limiting seats (92) is movably connected to a limiting sliding hole (93), and the limiting support rod (83) passes through the limiting sliding hole (93). The side limiting seat (92) is also provided with a threaded hole (94), and the threaded lifting rod (84) is engaged with the inner thread of the threaded hole (94).

4. The precise grading device for macadamia nut shells according to claim 3, characterized in that: Both ends of the material gate (95) are integrally provided with end shafts (97), and both ends of the top frame (82) are fixedly connected with gate openers (10) corresponding to the end shafts (97).

5. The precise grading device for macadamia nut shells according to claim 4, characterized in that: The material gate opener (10) includes an extension vertical rod (101) fixedly connected to the bottom of the top frame (82), and the other end of the extension vertical rod (101) is integrally provided with an inclined stop (104). Above the inclined stop (104) is a rotating rocker (102) movably connected to the extension vertical rod (101). The rotating rocker arm (102) has an arc-shaped groove (103) located above the end shaft (97) at the end away from the inclined stop (104).

6. The precise grading device for macadamia nut shells according to claim 2, characterized in that: The hollow hopper (91) is inclined downward on the side near the material gate (95), and the side of the hollow hopper (91) away from the material gate (95) is fixedly connected with support columns (96) in a rectangular array, and the bottom of the support columns (96) is in contact with the fixed base.

7. The precise grading device for macadamia nut shells according to claim 1, characterized in that: The bottom of the U-shaped guide frame (1) is also fixedly connected to the bottom frame (2), and both ends of the screening roller (4) are movably connected to the bottom frame (2); The bottom frame (2) is also fixedly connected to a grading guide plate (12) corresponding to the screening roller (4) on one side, and one end of the grading guide plate (12) extends to the inside of the screening roller (4).

8. The precise grading device for macadamia nut shells according to claim 7, characterized in that: The diameter of the grading holes (5) on all the screening rollers (4) increases from left to right. Both sides of the U-shaped guide frame (1) are symmetrically fixedly connected with limit baffles (6), and the inner side of the limit baffles (6) is slidably fitted with a material dropping speed limiting plate (7).

9. The precise grading device for macadamia nut shells according to claim 8, characterized in that: The material discharge speed limiter (7) includes a plug-in baffle (71), and both ends of the plug-in baffle (71) are provided with threaded adjustment holes (72) in a rectangular array. Both ends of the plug-in baffle (71) are provided with limit screws (73) that are threadedly engaged with the threaded adjustment holes (72).

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