Nut shell breaking mechanism

Abstract

The nut shell breaking mechanism comprises a first push rod, a second push rod, a supporting frame, a first servo motor and a second servo motor, the first push rod and the second push rod are both installed on the supporting frame, the first push rod and the second push rod are parallel to each other and are both located on the same plane, and external threads are arranged at one end of the first push rod and one end of the second push rod; the first push rod is provided with a first gear, and the second push rod is provided with a second gear. According to the macadamia nut shell breaking device, independent push rods are connected with shell breaking cutters, so that the stroke of each shell breaking cutter can be independently controlled, macadamia nuts with different diameters can be broken during shell breaking, servo motors are alternately arranged on a supporting frame up and down, the distance between the shell breaking cutters is the same as the distance between shell breaking cutters of existing equipment, and the shell breaking efficiency is improved. According to the macadamia nut shell breaking device, existing equipment can be conveniently upgraded, mutual collision between servo motors is avoided, meanwhile, whether shells of macadamia nuts are broken or not is detected through torque detection modules of the servo motors, and the proportion of complete kernels after shell breaking is increased.

Description

Technical Field

[0001] This application relates to the technical field of macadamia nut processing, and particularly to a nut shelling mechanism. Background Art

[0002] Macadamia nuts, also known as Hawaiian nuts, are a type of nut rich in nutrients. With the expansion of the planting area in recent years, the output has been continuously increasing, and the current processing equipment has been upgraded from semi-automatic to fully automatic. The outer shell of macadamia nut kernels is hard. For macadamia nuts that need to be sold in the form of kernels, the wooden shell needs to be cracked. For example, Chinese Patent No. 202321193767.1 discloses a multi-knife-position propulsion double-knife counter-pressure nut shelling device, which includes a frame, a support frame, a feeding hopper, a feeding mechanism, a first cutting knife, a material pushing mechanism, a vertical plate, a second cutting knife, and a receiving trough. The feeding hopper is installed on the support frame, the feeding mechanism is installed inside the support frame, the first cutting knife is installed on the frame, the material pushing mechanism is installed on the chute provided on the vertical plate through a slider and a baffle, the second cutting knife and the receiving trough are installed at the bottom of the material pushing mechanism, a sliding guide rail is opened in the center of the vertical plate, and a sliding member is slidably installed on the sliding guide rail. It generates a thrust through an electric push rod to press the cutting knife against the outside of the macadamia nut, so that the shell of the macadamia nut is squeezed and broken. In the macadamia nut industry, the unit price of intact kernels is 2 to 3 times that of broken kernels. In order to prevent the cutting knife from crushing the kernels during shelling, when these shelling devices are shelling, macadamia nuts with similar diameters are shelled, and then the moving stroke of the cutting knife is restricted to prevent the kernels from being crushed. Therefore, such devices have relatively high requirements for the grading equipment of macadamia nuts. When the diameter difference of macadamia nuts is too large, the kernels will be squeezed or the shelling will be incomplete and need to be shelled again. Therefore, a nut shelling mechanism is needed, in which each cutting knife is individually pushed by a servo motor, has a wider diameter range requirement for macadamia nuts, and the servo motors are installed alternately up and down, so that the cutting knives can be installed compactly, facilitating the upgrade and transformation of existing equipment. Summary of the Utility Model

[0003] To solve the above problems, this application proposes a nut shelling mechanism, in which each cutting knife is individually pushed by a servo motor, has a wider diameter range requirement for macadamia nuts, and the servo motors are installed alternately up and down, so that the cutting knives can be installed compactly, facilitating the upgrade and transformation of existing equipment.

[0004] This application is achieved through the following technical solutions:

[0005] This application proposes a nut shelling mechanism, including: a first push rod, a second push rod, a support frame, a first servo motor, and a second servo motor. The first push rod and the second push rod are both installed on the support frame. The first push rod and the second push rod are parallel to each other and in the same plane. One end of the first push rod and the second push rod is provided with an external thread. A first gear is provided on the first push rod, and a second gear is provided on the second push rod. Internal threads are provided in the middle of the first gear and the second gear; The first gear and the second gear are both installed on the support frame, and the first gear and the second gear are alternately arranged on the support frame; The first servo motor is installed on the upper part of the support frame, and the second servo motor is installed on the lower part of the support frame. Third gears are provided on the rotating shafts of the first servo motor and the second servo motor. The first servo motor is connected to the first gear through the third gear, and the second servo motor is connected to the second gear through the third gear.

[0006] Further, shelling cutters are provided at the ends of the first push rod and the second push rod, and the shelling cutters are arranged evenly in a straight line.

[0007] Further, a front baffle and a rear baffle are provided on the support frame. The front baffle and the rear baffle are installed on both sides of the support frame, and the front baffle and the rear baffle are respectively connected to the first gear and the second gear through sleeves.

[0008] Further, a reinforcing rib is provided on one side of the rear baffle, and the rear baffle is connected to the front baffle through a connecting rod.

[0009] Further, a positioning plate is provided on one side of the front baffle. The positioning plate is connected to the front baffle through a connecting rod. A guiding hole is provided in the middle of the positioning plate. The first push rod and the second push rod pass through the guiding hole, and guiding grooves are provided on the first push rod and the second push rod. Protrusions corresponding to the guiding grooves are provided on the inner wall of the guiding hole.

[0010] Further, a cross bar is provided on the support frame. The cross bar straddles the support frame and both ends of the cross bar are fixedly connected to the support frame. The first servo motor and the second servo motor are connected to the cross bar through bolts.

[0011] Further, torque detection modules are provided on the upper parts of the first servo motor and the second servo motor.

[0012] Advantages of this application:

[0013] 1. By connecting a separate push rod to the shelling cutter and driving the push rod separately by a servo motor, the stroke of each shelling cutter can be independently controlled, and macadamia nuts with different diameters can be shelled during shelling;

[0014] 2. The servo motors are arranged alternately up and down on the support frame, so that the distance between the shelling cutters is the same as that of the shelling cutters of the existing equipment, which is convenient for upgrading the existing equipment and avoiding mutual collision between the servo motors;

[0015] 3. Use the torque detection module of the servo motor to detect whether the shell of macadamia nuts is cracked, avoid crushing the kernels, and increase the proportion of intact kernels after shelling. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the present utility model;

[0017] Figure 2 It is a schematic diagram of the installation position of the servo motor of the present utility model;

[0018] Figure 3 It is a schematic structural diagram of the front baffle of the present utility model;

[0019] Figure 4 It is a schematic structural diagram of the rear baffle of the present utility model;

[0020] Figure 5 It is a schematic diagram of the gear meshing and arrangement distribution of the present utility model;

[0021] In the figure: 1 - shelling cutter, 2 - first push rod, 3 - second push rod, 4 - support frame, 5 - first servo motor, 6 - second servo motor, 7 - first gear, 8 - second gear, 9 - third gear, 10 - front baffle, 11 - rear baffle, 12 - sleeve, 13 - reinforcing rib, 14 - cross bar, 15 - positioning plate, 16 - guide hole, 17 - guide groove. Detailed Embodiment

[0022] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Among them, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the said features. Additionally, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0025] As Figures 1 to 5 shown, an embodiment of the present utility model provides a nut shell-breaking mechanism, including: a first push rod 2, a second push rod 3, a support frame 4, a first servo motor 5, and a second servo motor 6. Both the first push rod 2 and the second push rod 3 are installed on the support frame 4. The first push rod 2 and the second push rod 3 are parallel to each other and are both in the same plane. One end of each of the first push rod 2 and the second push rod 3 is provided with an external thread. A first gear 7 is provided on the first push rod 2, and a second gear 8 is provided on the second push rod 3. Internal threads are provided in the middle of both the first gear 7 and the second gear 8. Both the first gear 7 and the second gear 8 are installed on the support frame 4, and the first gear 7 and the second gear 8 are arranged alternately on the support frame 4. The first servo motor 5 is installed on the upper part of the support frame 4, and the second servo motor 6 is installed on the lower part of the support frame 4. Third gears 9 are provided on the rotating shafts of both the first servo motor 5 and the second servo motor 6. The first servo motor 5 is connected to the first gear 7 through the third gear 9, and the second servo motor 6 is connected to the second gear 8 through the third gear 9.

[0026] This nut shell-breaking mechanism is mainly installed in the shell-breaking equipment for macadamia nuts, such as disclosed in the Chinese patent with the application number 202321193767.1. The original equipment uses a single electric push rod. Therefore, the distance between the shell-breaking cutters of the original equipment is very close. When this application is upgraded to use servo motors for driving, multiple servo motors cannot be installed on a horizontal plane. Therefore, in this application, the first servo motor 5 and the second servo motor 6 are installed separately above and below the support frame 4. At the same time, the first gear 7 and the second gear 8 are installed alternately to avoid mutual interference. After the staggered arrangement in the vertical and horizontal directions, the distance between the first push rod 2 and the second push rod 3 in this application can be the same as the distance between the shell-breaking cutters of the existing equipment, and servo motors of the 50mm×50mm series or 60mm×60mm series can be installed, which is convenient for upgrading the existing equipment to reduce the upgrading cost of production enterprises.

[0027] The principle of this macadamia nut shelling mechanism is also similar to that of existing equipment. It mainly crushes the shell of macadamia nuts by squeezing with the shelling cutter 1. The main difference lies in the driving method. When this macadamia nut shelling mechanism is shelling, after the first servo motor 5 or the second servo motor 6 rotates, the third gear 9 drives the first gear 7 or the second gear 8 to rotate. The internal threads of the first gear 7 and the second gear 8 drive the first push rod 2 or the second push rod 3 to move axially, thereby synchronously driving the shelling cutter 1 to move. The shelling cutter 1 is an existing shelling cutter, and pressure is applied to the shell of the macadamia nut through the end of the shelling cutter, causing the wooden shell of the macadamia nut to crack. By connecting a separate push rod to the shelling cutter 1 and driving the push rod separately by a servo motor, the stroke of each shelling cutter 1 can be independently controlled, and macadamia nuts with different diameters can be shelled during shelling.

[0028] The first servo motor 5 or the second servo motor 6 has a torque detection function. After the shelled macadamia nuts are baked, the shell becomes very brittle. When the macadamia nut is compressed by the shelling cutter 1, at the moment of cracking, the torque of the servo motor will decrease instantaneously. By setting the servo controller, when it detects that the torque will decrease instantaneously, the first servo motor 5 or the second servo motor 6 is controlled to rotate in the reverse direction to avoid crushing the kernel and release the crushed macadamia nuts, allowing them to fall into the collection box.

[0029] Preferably, shelling cutters 1 are provided at the ends of both the first push rod 2 and the second push rod 3. The shelling cutters 1 are arranged evenly in a straight line. The shelling cutters 1 are existing shelling cutters. Pressure is applied to the shell of the macadamia nut through the ends of the shelling cutters, causing the wooden shell of the macadamia nut to crack. By connecting a separate push rod to the shelling cutter 1 and driving the push rod separately by a servo motor, the stroke of each shelling cutter 1 can be independently controlled, and macadamia nuts with different diameters can be shelled during shelling.

[0030] Specifically, a front baffle 10 and a rear baffle 11 are provided on the support frame 4. The front baffle 10 and the rear baffle 11 are installed on both sides of the support frame 4, and the front baffle 10 and the rear baffle 11 are respectively connected to the first gear 7 and the second gear 8 through sleeves 12. The front baffle 10 and the rear baffle 11 support both sides of the first gear 7 and the second gear 8 through the sleeves 12, so that the first gear 7 and the second gear 8 will not move axially when rotating, thereby pushing the first push rod 2 and the second push rod 3 to move axially.

[0031] In a preferred embodiment, as Figure 4 shown, a reinforcing rib 13 is provided on one side of the rear baffle 11 to improve the bending resistance of the rear baffle 11 and prevent the rear baffle 11 from being bent by the reaction force during shelling. The rear baffle 11 is connected to the front baffle 10 through a connecting rod to further improve the structural strength of the rear baffle 11.

[0032] Specifically, asFigure 3 On one side of the shown front baffle 10, there is a positioning plate 15. The positioning plate 15 is connected to the front baffle 10 through a connecting rod. A guiding hole 16 is provided in the middle of the positioning plate 15. The first push rod 2 and the second push rod 3 pass through the guiding hole 16, and guiding grooves 17 are provided on the first push rod 2 and the second push rod 3. On the inner wall of the guiding hole 16, there are protrusions corresponding to the guiding grooves 17. Through the guiding grooves 17 and the protrusions, the first push rod 2 and the second push rod 3 can only move axially and will not rotate synchronously with the gear, so as to facilitate the smooth operation of the equipment.

[0033] In a specific embodiment, as Figure 3 、 Figure 4 shown, a cross bar 14 is provided on the support frame 4. The cross bar 14 straddles the support frame 4 and both ends of the cross bar 14 are fixedly connected to the support frame 4. The first servo motor 5 and the second servo motor 6 are connected to the cross bar 14 through bolts. By providing an installation position through the cross bar 14, the first servo motor 5 and the second servo motor 6 can be installed front and back crosswise on the support frame 4.

[0034] Specifically, torque detection modules are provided on the upper parts of the first servo motor 5 and the second servo motor 6. The first servo motor 5, the second servo motor 6, and the torque detection modules all adopt existing commercially available mature products. After the shelled macadamia nuts are baked, the shell becomes very brittle. When the macadamia nuts are compressed by the shelling cutter 1, at the moment of rupture, the torque of the servo motor will instantaneously decrease. By setting the servo controller, when it is detected that the torque will instantaneously decrease, the first servo motor 5 or the second servo motor 6 is controlled to rotate in the reverse direction to avoid crushing the nuts and release the crushed macadamia nuts so that they fall into the collection box.

[0035] Certainly, the present application can also have many other implementation manners. Based on this implementation manner, other implementation manners obtained by ordinary technical personnel in the art without any creative work belong to the scope protected by the present application.

Claims

1. A nut shelling mechanism, characterized in that: include: A first push rod (2), a second push rod (3), a support frame (4), a first servo motor (5), and a second servo motor (6); the first push rod (2) and the second push rod (3) are both mounted on the support frame (4); the first push rod (2) and the second push rod (3) are parallel to each other and are both on the same plane; one end of the first push rod (2) and the second push rod (3) are both provided with external threads; the first push rod (2) is provided with a first gear (7); the second push rod (3) is provided with a second gear (8); and the middle parts of the first gear (7) and the second gear (8) are both provided with internal threads; A gear (7) and a second gear (8) are both mounted on a support frame (4), and the first gear (7) and the second gear (8) are alternately arranged on the support frame (4); the first servo motor (5) is mounted on the upper part of the support frame (4), and the second servo motor (6) is mounted on the lower part of the support frame (4); a third gear (9) is provided on the rotating shafts of the first servo motor (5) and the second servo motor (6); the first servo motor (5) is connected to the first gear (7) via the third gear (9), and the second servo motor (6) is connected to the second gear (8) via the third gear (9).

2. A nut shelling mechanism according to claim 1, characterized in that: The ends of the first push rod (2) and the second push rod (3) are both provided with shell-breaking cutters (1), and the shell-breaking cutters (1) are evenly arranged along a straight line.

3. A nut shelling mechanism according to claim 1, characterized in that: The support frame (4) is provided with a front baffle (10) and a rear baffle (11), the front baffle (10) and the rear baffle (11) are installed on both sides of the support frame (4), and the front baffle (10) and the rear baffle (11) are respectively connected to the first gear (7) and the second gear (8) through a sleeve (12).

4. A nut shelling mechanism according to claim 3, characterized in that: A reinforcing rib (13) is provided on one side of the rear baffle (11), and the rear baffle (11) is connected to the front baffle (10) via a connecting rod.

5. A nut shelling mechanism according to claim 3, characterized in that: A positioning plate (15) is provided on one side of the front baffle (10), and the positioning plate (15) is connected to the front baffle (10) through a connecting rod. A guide hole (16) is provided in the middle of the positioning plate (15), and the first push rod (2) and the second push rod (3) pass through the guide hole (16). The first push rod (2) and the second push rod (3) are provided with a guide groove (17), and a protrusion corresponding to the guide groove (17) is provided on the inner wall of the guide hole (16).

6. A nut shelling mechanism according to claim 1, characterized in that: The support frame (4) is provided with a cross bar (14), the cross bar (14) spans the support frame (4) and both ends of the cross bar (14) are fixedly connected to the support frame (4), and the first servo motor (5) and the second servo motor (6) are connected to the cross bar (14) by bolts.

7. A nut shelling mechanism according to claim 1, characterized in that: The first servo motor (5) and the second servo motor (6) are both provided with torque detection modules on their upper parts.

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