Coarse cereal grinding device

Abstract

The invention relates to the technical field of coarse cereal grinding, and discloses a coarse cereal grinding device which comprises a material box, a motor is installed on the material box, the material box is communicated with a feeding pipe, the output end of the motor is connected with a conveying device, the surface of the material box is fixedly connected with a fixing box, the bottom of the fixing box is connected with a base through a connecting piece, and the fixing box is connected with the base through a connecting piece. And a grinding assembly for grinding coarse cereals is arranged in the fixed box. According to the coarse cereal grinding device, millstone type grinding of coarse cereals can be achieved through the arranged grinding assembly, meanwhile, extrusion type grinding can also be achieved, hard extrusion can be directly conducted on some hard coarse cereal particles, the grinding quality is guaranteed, the lower millstone is designed to be of a four-split-type structure, and when the coarse cereals are ground, the millstone type grinding device can be used for grinding the coarse cereals. And rotary grinding after up-and-down staggered actions is realized, so that the overall grinding effect is improved, and the grinding quality and the grinding sufficiency under single-time grinding are improved.

Description

Technical Field

[0001] The invention relates to the technical field of grain grinding, in particular to a grain grinding device. Background Art

[0002] Coarse grains usually refer to grain and bean crops other than the five major crops of rice, wheat, corn, soybeans and potatoes. Coarse grains are rich in nutrients, beneficial to human health, and have the effects of relieving constipation, regulating blood lipids and supplementing nutrition. For people's convenience, coarse grains are usually ground into powder and then consumed.

[0003] There are various grain grinding equipments in the prior art, but they basically rely on grinding discs or pressure rollers for crushing grinding. This single method has poor grinding effect and insufficient grinding. If some harder grains are ground, it is difficult to completely reduce the grinding by relying solely on the rotation of the grinding disc. It is often necessary to collect the grains ground for the first time and then grind them repeatedly to meet the grinding requirements. This grinding method is relatively cumbersome and requires operators to manually collect them and then pour them into the grinding equipment, which affects the grinding efficiency and increases the labor intensity of the operators. The degree of automation is low, so a grain grinding device is proposed to solve the above problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a grain grinding device, which solves the problems of poor grain grinding effect, insufficient grinding and overly single grinding process in the prior equipment.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a miscellaneous grain grinding device, comprising a material box, a motor is installed on the material box, a feed pipe is connected to the material box, the output end of the motor is connected to a conveying device, the surface of the material box is fixedly connected to a fixed box, the bottom of the fixed box is connected to a base via a connecting piece, a grinding component for grinding miscellaneous grains is arranged inside the fixed box, and a self-circulation component is arranged on the fixed box; the motor drives the conveying device to extrude and convey the miscellaneous grains inside the material box; the drive of the motor will synchronously drive the grinding component to extrude and rotate the miscellaneous grains inside; the operation of the grinding component will drive the self-circulation component to automatically and regularly circulate the ground miscellaneous grains.

[0008] Preferably, the conveying device includes a driving shaft, one end of the driving shaft is connected to the output end of the motor, the other end of the driving shaft is connected to the grinding assembly, the surface of the driving shaft is connected to a spiral blade, and a feed port is opened at the bottom of the material box.

[0009] Preferably, the grinding assembly includes an upper grinding disc, which is fixed on a material box, a lower grinding disc is arranged below the upper grinding disc, and the lower grinding disc is connected to a driving shaft through a connecting piece, the opposing surfaces of the upper grinding disc and the lower grinding disc are both provided with grinding grooves, the opposing surfaces of the upper grinding disc and the lower grinding disc are in a conical structure, and a grinding space is arranged between the upper grinding disc and the lower grinding disc.

[0010] Preferably, the connecting member includes a driving plate, a sliding column is fixedly connected to the driving plate, the sliding column is slidably connected to the lower grinding plate, and the driving plate is slidably connected to the driving shaft via a key groove; the lower grinding plate includes four split plates, and the multiple split plates are slidably connected to each other via T-slots.

[0011] Preferably, the bottoms of the multiple split disks are fixedly connected with bottom cones, a fixing plate is provided above the base, and a plurality of rollers are provided on the fixing plate. Each rotation of the split disk will drive the bottom cone and the fixing plate to slide and squeeze, causing the split disk to move up and down slightly to squeeze and crush the grains in the grinding space.

[0012] Preferably, an adjustment device is provided below the lower grinding disc, and the adjustment device includes an adjustment rod, an adjustment plate is threadedly connected to the surface of the adjustment rod, the adjustment plate is slidably connected to the base through a key slot, an adjustment spring is connected to the top of the adjustment plate, and the top of the adjustment spring abuts against the driving disc.

[0013] Preferably, the self-circulating component includes a transmission device and a circulation device; the transmission device includes a rotating plate, to which a sleeve gear ring 711 is fixedly connected, and a pinion is meshed on the sleeve gear ring, and the pinion is connected to the circulation device.

[0014] Preferably, the circulation device includes a key shaft, which is slidably connected to the pinion gear through a keyway, one side of the pinion gear is connected to an extrusion spring, the other side of the pinion gear is fixedly connected to a cam sleeve, the right end of the extrusion spring is connected to a spring sheet, and the spring sheet is fixed on the key shaft, one end of the key shaft is rotatably connected to the material box, the other end of the key shaft is fixedly connected to a rotating screw through a connecting rod, the surface of the rotating screw rod is threadedly connected to a threaded sleeve, two push rods are connected to the threaded sleeve, the bottom of the threaded sleeve is slidably connected to the fixed box through a connecting rod, the rotating screw rod is slidably connected to a pull rod, the bottom of the pull rod is connected to a baffle, the baffle is located inside a powder chamber opened inside the fixed box, the surface of the pull rod is fixedly connected to an abutment sheet, and the abutment sheet abuts against the cam sleeve.

[0015] Preferably, a slot cooperating with the baffle is provided inside the fixed box, a sliding groove is provided inside the pull rod, the rotating screw is located inside the sliding groove, and the baffle abuts against the surface of the lower grinding disc.

[0016] Preferably, a reflux groove is provided on the upper grinding disc, a reflux hole is provided inside the upper grinding disc, the reflux hole is connected to the grinding space, an outlet groove is provided at the bottom of the fixed box, a collecting box is provided below the lower outlet groove, and the collecting box is fixed on the fixed box.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a grain grinding device, which has the following beneficial effects:

[0019] 1. The grain grinding device can realize the disc-type grinding of grains through the provided grinding components, and can also realize the extrusion-type grinding, so that some harder grain particles can be directly extruded, thereby ensuring the grinding quality. By designing the lower grinding disc into four split structures, it can realize "rotational grinding after staggered up and down movements" when grinding grains, thereby improving the overall grinding effect, and improving the grinding quality and grinding sufficiency in a single grinding.

[0020] 2. The grain grinding device can automatically time and trigger the action through the self-circulation component, so as to automatically feed the ground grains and then automatically re-enter the grinding space to realize automatic material return, avoiding the situation of low grinding quality caused by short grinding time. Therefore, the overall solution adds an automatic feeding device for some grains that are difficult to grind and need to be repeatedly ground, thereby improving the overall grain grinding efficiency. There is no need for manual feeding by operators, which is more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a grain grinding device proposed by the present invention;

[0022] Figure 2 This is a schematic diagram of the overall cross-sectional structure of a grain grinding device proposed by the present invention;

[0023] Figure 3 A schematic diagram of the structure of a grinding component of a grain grinding device proposed by the present invention;

[0024] Figure 4 A schematic diagram of the connection position of the bottom cone of a grain grinding device proposed by the present invention;

[0025] Figure 5This is a schematic diagram of the transmission of the sleeve gear ring connection of a grain grinding device proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of a self-circulating component of a grain grinding device proposed by the present invention;

[0027] Figure 7 A schematic diagram of a cam sleeve connection structure of a grain grinding device proposed by the present invention;

[0028] Figure 8 The present invention provides a schematic cross-sectional structure diagram of an upper grinding disc of a grain grinding device.

[0029] In the figure: 1. material box; 2. motor; 3. feed pipe; 4. fixed box; 5. collection box; 6. base; 7. grinding assembly; 701. upper grinding disc; 7011. reflux hole; 7012. reflux groove; 702. lower grinding disc; 703. driving disc; 704. sliding column; 705. adjusting plate; 706. adjusting rod; 707. adjusting spring; 708. bottom cone; 709. fixed plate; 710. rotating plate; 711. sleeve gear ring; 8. self-circulation assembly; 801. pull rod; 802. baffle plate; 803. cam sleeve; 804. abutment plate; 805. threaded sleeve; 806. rotating screw; 807. push rod; 808. pinion; 809. slot; 810. sliding groove; 811. key shaft; 812. extrusion spring; 813. spring plate; 9. driving shaft. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 8 A grain grinding device comprises a material box 1, a motor 2 is installed on the material box 1, a feed pipe 3 is connected to the material box 1, an output end of the motor 2 is connected to a conveying device, a fixed box 4 is fixedly connected to the surface of the material box 1, a base 6 is connected to the bottom of the fixed box 4 through a connecting piece, a grinding component 7 for grinding grains is arranged inside the fixed box 4, and a self-circulation component 8 is arranged on the fixed box 4; the motor 2 drives the conveying device to extrude and convey the grains inside the material box 1; the driving of the motor 2 will synchronously drive the grinding component 7 to extrude and rotate the grains inside; the operation of the grinding component 7 will drive the self-circulation component 8 to automatically and regularly circulate the ground grains.

[0032] In this embodiment, the conveying device includes a drive shaft 9, one end of the drive shaft 9 is connected to the output end of the motor 2, the other end of the drive shaft 9 is connected to the grinding assembly 7, the surface of the drive shaft 9 is connected with a spiral blade, and a feed port is opened at the bottom of the material box 1.

[0033] Furthermore, the grinding assembly 7 includes an upper grinding disc 701, which is fixed on the material box 1, and a lower grinding disc 702 is arranged below the upper grinding disc 701. The lower grinding disc 702 is connected to the driving shaft 9 through a connecting piece, and the opposing surfaces of the upper grinding disc 701 and the lower grinding disc 702 are both provided with grinding patterns. The provided grinding patterns can increase a certain friction force and improve the grinding effect laterally. The opposing surfaces of the upper grinding disc 701 and the lower grinding disc 702 are in a conical structure. The conical structure is convenient for guiding the ground powder to slide down, and a grinding space is provided between the upper grinding disc 701 and the lower grinding disc 702. The connecting part includes a driving disk 703, to which a sliding column 704 is fixedly connected. The sliding column 704 is slidingly connected to the lower grinding disk 702, and the driving disk 703 is slidingly connected to the driving shaft 9 via a keyway. As the driving shaft 9 rotates, the driving disk 703 will be driven to rotate, and the driving disk 703 will drive the lower grinding disk 702 to rotate through the connection of the sliding column 704, thereby realizing the rotary grinding of grains. Because the lower grinding disk 702 is composed of four split disks, the sliding connection of the sliding column 704 is utilized to provide the four split disks with the freedom to move up and down, but this will not affect the entire rotary grinding process.

[0034] Furthermore, the lower grinding disc 702 includes four split discs, and the multiple split discs are slidably connected to each other through T-slots. The bottoms of the multiple split discs are fixedly connected with bottom cones 708, and a fixing plate 709 is arranged above the base 6, and a plurality of rollers are arranged on the fixing plate 709. Each rotation of the split disc will drive the bottom cone 708 and the fixing plate 709 to slide and squeeze, so that the split disc moves up and down slightly to squeeze and crush the grains in the grinding space. The main purpose of setting the lower grinding disc 702 into four split discs is to deal with some harder grains that are not completely ground in one go and need to be ground repeatedly. The specific process is that when the bottom cone 708 of one of the split discs rotates one circle, it will slide in contact with and press against multiple fixed plates 709, and the position height of the fixed plates 709 is fixed, so when the bottom cone 708 and the fixed plates 709 slide in an inclined surface, the split discs will be driven to move upward. The purpose of the upward movement is to directly squeeze and crush the grains in the grinding space to improve the grinding effect.

[0035] In addition, an adjustment device is provided below the lower grinding disc 702, and the adjustment device includes an adjustment rod 706, and an adjustment sheet 705 is threadedly connected to the surface of the adjustment rod 706, and the adjustment sheet 705 is slidably connected to the base 6 through a keyway, and an adjustment spring 707 is connected to the top of the adjustment sheet 705, and the top of the adjustment spring 707 abuts against the driving disc 703. The operator rotates the adjustment rod 706, and the adjustment sheet 705 is driven to move up and down by the threaded connection, and then the elastic force of the adjustment spring 707 on the driving sheet 703 is adjusted, so as to adjust the squeezing force of the lower grinding disc 702 on the grains.

[0036] In addition, the self-circulation component 8 includes a transmission device and a circulation device; the transmission device includes a rotating plate 710, a collar ring 711 is fixedly connected to the rotating plate 710, a pinion 808 is meshed on the collar ring 711, and the pinion 808 is connected to the circulation device. Through the collar ring 711, the rotation power of the lower grinding disc 702 is used as a power source to drive the circulation device to perform automatic feeding reciprocating grinding.

[0037] It is worth noting that the circulation device includes a key shaft 811, which is slidably connected to the pinion 808 through a key groove, one side of the pinion 808 is connected to an extrusion spring 812, and the other side of the pinion 808 is fixedly connected to the cam sleeve 803, the right end of the extrusion spring 812 is connected to a spring sheet 813, and the spring sheet 813 is fixed on the key shaft 811, one end of the key shaft 811 is rotatably connected to the material box 1, and the other end of the key shaft 811 is fixedly connected to a rotating screw through a connecting rod. 806, the surface of the rotating screw 806 is threadedly connected with a threaded sleeve 805, and the threaded sleeve 805 is connected with two push rods 807. The bottom of the threaded sleeve 805 is slidably connected to the fixed box 4 through a connecting rod. The rotating screw 806 is slidably connected with a pull rod 801, and the bottom of the pull rod 801 is connected with a baffle 802, which is located inside the powder chamber opened inside the fixed box 4. The surface of the pull rod 801 is fixedly connected with a contact piece 804, and the contact piece 804 contacts the cam sleeve 803. When the lower grinding disc 702 rotates, the keyway connection will drive the rotating plate 710 to rotate, and the rotation of the rotating plate 710 will drive the sleeve gear ring 711 to rotate, and then the mutual engagement between the teeth will drive the small gear 808 to rotate, and the rotation of the small gear 808 will drive the cam sleeve 803 to rotate. The cam structure is used to indirectly drive the pull rod 801 to lift, which will drive the baffle 802 to move upward. Therefore, during the upward movement of the baffle 802, the carried grinding material will be guided to the inside of the reflux groove 7012, and then flow to the position of the reflux hole 7011, and then flow back to the grinding space.

[0038] It is worth noting that a slot 809 cooperating with the baffle 802 is provided inside the fixed box 4, a sliding slot 810 is provided inside the pull rod 801, the rotating screw 806 is located inside the sliding slot 810, the baffle 802 abuts against the surface of the lower grinding disc 702, and after the pull rod 801 is moved down to the limit position by the impact force, the baffle 802 is reinserted into the position of the slot 809, exposing the discharge trough, and then as the discharge trough is opened, the ground grains will be discharged and enter the collection box 5 for collection. A reflux slot 7012 is provided on the upper grinding disc 701, and a reflux hole 7011 is provided inside the upper grinding disc 701, and the reflux hole 7011 is connected to the grinding space, an outlet slot is provided at the bottom of the fixed box 4, and a collection box 5 is provided below the lower outlet slot, and the collection box 5 is fixed on the fixed box 4. When the ground material is moved upward by the baffle 802 and the powder is moved to the highest point, it will enter the inside of the reflux groove 7012. Then, as the toothed ring 711 rotates, the rotating plate 710 is driven to rotate, and the granular powder in the reflux groove 7012 is gradually swept into the inside of the reflux hole 7011, realizing automatic reciprocating feeding and grinding.

[0039] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0040] Working principle: first, the operator needs to put the grains to be ground into the material box 1 from the position of the feed pipe 3, and then start the operation of the motor 2 to drive the rotation of the drive shaft 9, and then the drive shaft 9 will drive the spiral blades on the surface to rotate, and the material will be gradually squeezed and transported to the bottom of the material box 1 along with the rotation of the spiral blades, and enter the top of the lower grinding disc 702 from the position of the discharge port. Because of the conical structure of the surface of the lower grinding disc 702, the grains will gradually roll downward obliquely and enter the grinding space between the upper grinding disc 701 and the lower grinding disc 702, and then synchronously with the rotation of the drive shaft 9, it will drive the rotation of the drive disc 703, and the drive disc 703 will drive the lower grinding disc 702 to rotate through the connection of the sliding column 704, so as to realize the rotary grinding of the grains. In the initial stage, the grinding space between the upper grinding disc 701 and the lower grinding disc 702, that is, the spacing, is very small. As the spiral blade drives the extrusion of the material, a downward extrusion force will be generated on the lower grinding disc 702, and the lower grinding disc 702 will transfer the force to the driving disc 703. After that, the driving disc 703 moves downward and transfers the force to the adjusting spring 707. Therefore, the elastic force of the adjusting spring 707 is used as the extrusion force as a whole, providing an upward extrusion thrust for the lower grinding disc 702, thereby realizing the rotary extrusion grinding of miscellaneous grains. The entire design scheme sets the lower grinding disc 702 into four split discs. The main purpose is to target some harder grains that need to be repeatedly ground because a single grinding is not thorough. The specific process is that when the bottom cone 708 of one of the split discs rotates one circle, it will slide, contact and press against multiple fixed plates 709. The position height of the fixed plates 709 is fixed, so when the bottom cone 708 slides against the fixed plates 709 on the inclined surface, it will drive the split disc to move upward. The purpose of moving upward is to directly squeeze and crush the grains in the grinding space to avoid the situation where incomplete crushing is caused by only adjusting the elastic force of the spring 707. The bottom of the four split discs is provided with a bottom cone 708, so the overall grinding action is that the four split discs will interlace with each other in small up and down movements when rotating and grinding, thereby improving the grinding effect of the grains, and the ground material will gradually flow into the powder cavity inside the fixed box 4 along with the conical surface of the lower grinding disc 702, and be carried by the blocking piece 802. Then, the grains slide along the inclined surface of the baffle 802 to the inside of the collection box 5 to collect the ground grains.In order to take into account that some harder grains may not be ground thoroughly in a single grinding and may need to be ground repeatedly, a self-circulating component 8 is provided. When the grains ground once enter the baffle 802, the baffle 802 can actually move up and down to move the ground materials to the reflux groove 7012 provided on the upper grinding disc 701. The specific movement process is that when the lower grinding disc 702 rotates, the rotation of the rotating plate 710 will be driven through the keyway connection, and the rotation of the rotating plate 710 will drive the sleeve gear ring 711 to rotate, and then the teeth will mesh with each other. It will drive the small gear 808 to rotate, and the rotation of the small gear 808 will drive the cam sleeve 803 to rotate, and each time the cam sleeve 803 rotates one circle, it will drive the abutment plate 804 to move upward through the protrusion, and the upward movement of the abutment plate 804 will drive the pull rod 801 to move upward, and then the pull rod 801 will drive the baffle plate 802 to move upward, so during the upward movement of the baffle plate 802, the carried grinding material will be guided to the inside of the reflux groove 7012, and then flow to the position of the reflux hole 7011, and then flow back to the grinding space, realizing reciprocating automatic feeding and grinding. At the same time, a similar timing device is set up to discharge the material after reciprocating grinding. Every time the cam sleeve 803 rotates, it will synchronously drive the rotating screw 806 to rotate, and the rotating screw 806 will drive the threaded sleeve 805 to move horizontally through the threaded connection. The threaded sleeve 805 is limited by the connecting rod set at the bottom, and can only be restricted to move horizontally. When the threaded sleeve 805 moves horizontally, it will drive the two push rods 807 to move synchronously. After moving to a certain position, the two push rods 807 will It will abut against the side of the cam sleeve 803, thereby driving the cam sleeve 803 to move horizontally, and at the same time drive the pinion 808 to slide on the key shaft 811, so that the pinion 808 squeezes the extrusion spring 812, thereby disengaging from the sleeve gear ring 711. At this time, the cam sleeve 803 will move horizontally and will disengage from the abutment sheet 804, and then the pull rod 801 will sink following gravity, so that the blocking sheet 802 will be reinserted into the position of the slot 809, exposing the discharge trough, and then with the opening of the discharge trough, the ground grains will be discharged again and enter the interior of the collection box 5. Therefore, the overall solution realizes the timing cycle automatic feeding, and the timing time can be limited by setting the length of the rotating screw 806, because the end point of the trigger timing is that the two ejector rods 807 are appropriately moved to the limit position, and the cam sleeve 803 is pushed out of the contact position of the abutment sheet 804. When the self-circulating component 8 is not used, it is only necessary to move the threaded sleeve 805 to the right limit position, so the operator can set it according to their own needs.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A grain grinding device, characterized in that: include A material box (1), wherein a motor (2) is installed on the material box (1), a feed pipe (3) is connected to the material box (1), an output end of the motor (2) is connected to a conveying device, a fixed box (4) is fixedly connected to the surface of the material box (1), a bottom of the fixed box (4) is connected to a base (6) via a connecting piece, a grinding component (7) for grinding grains is arranged inside the fixed box (4), and a self-circulation component (8) is arranged on the fixed box (4); The motor (2) drives the conveying device to squeeze and convey the miscellaneous grains inside the material box (1); The driving of the motor (2) will synchronously drive the grinding assembly (7) to perform extrusion and rotation grinding on the miscellaneous grains inside; The operation of the grinding component (7) will drive the self-circulating component (8) to automatically circulate the ground grains in a timed manner.

2. A grain grinding device according to claim 1, characterized in that: The conveying device comprises a driving shaft (9), one end of the driving shaft (9) is connected to the output end of the motor (2), the other end of the driving shaft (9) is connected to the grinding assembly (7), the surface of the driving shaft (9) is connected to a spiral blade, and a feed port is provided at the bottom of the material box (1).

3. A grain grinding device according to claim 2, characterized in that: The grinding assembly (7) comprises an upper grinding disc (701), the upper grinding disc (701) being fixed on the material box (1), a lower grinding disc (702) being arranged below the upper grinding disc (701), the lower grinding disc (702) being connected to the driving shaft (9) via a connecting piece, the opposing surfaces of the upper grinding disc (701) and the lower grinding disc (702) being both provided with grinding grooves, the opposing surfaces of the upper grinding disc (701) and the lower grinding disc (702) being in a conical structure, and a grinding space being arranged between the upper grinding disc (701) and the lower grinding disc (702).

4. A grain grinding device according to claim 3, characterized in that: The connecting member comprises a driving disc (703), a sliding column (704) is fixedly connected to the driving disc (703), the sliding column (704) is slidably connected to the lower grinding disc (702), and the driving disc (703) is slidably connected to the driving shaft (9) via a keyway; The lower grinding disc (702) includes four split discs, and the multiple split discs are slidably connected to each other through T-slots.

5. A grain grinding device according to claim 4, characterized in that: The bottoms of the multiple split disks are all fixedly connected to a bottom cone (708), a fixing plate (709) is arranged above the base (6), and a plurality of rollers are arranged on the fixing plate (709). Each rotation of the split disk will drive the bottom cone (708) and the fixing plate (709) to slide and squeeze, thereby causing the split disk to move up and down slightly to squeeze and crush the grains in the grinding space.

6. A grain grinding device according to claim 4, characterized in that: An adjusting device is provided below the lower grinding disc (702), and the adjusting device comprises an adjusting rod (706). An adjusting plate (705) is threadedly connected to the surface of the adjusting rod (706). The adjusting plate (705) is slidably connected to the base (6) via a keyway. An adjusting spring (707) is connected to the top of the adjusting plate (705), and the top of the adjusting spring (707) abuts against the driving disc (703).

7. A grain grinding device according to claim 6, characterized in that: The self-circulating component (8) comprises a transmission device and a circulation device; The transmission device comprises a rotating plate (710), a sleeve gear ring (711) is fixedly connected to the rotating plate (710), a pinion gear (808) is meshed on the sleeve gear ring (711), and the pinion gear (808) is connected to the circulation device.

8. The grain grinding device according to claim 7, characterized in that: The circulation device comprises a key shaft (811), the key shaft (811) is slidably connected to a pinion gear (808) via a key groove, one side of the pinion gear (808) is connected to an extrusion spring (812), the other side of the pinion gear (808) is fixedly connected to a cam sleeve (803), the right end of the extrusion spring (812) is connected to a spring sheet (813), the spring sheet (813) is fixed to the key shaft (811), one end of the key shaft (811) is rotatably connected to a material box (1), the other end of the key shaft (811) is fixedly connected to a rotating screw rod (806) via a connecting rod, The surface of the rotating screw (806) is threadedly connected to a threaded sleeve (805), and two push rods (807) are connected to the threaded sleeve (805). The bottom of the threaded sleeve (805) is slidably connected to the fixed box (4) through a connecting rod. The rotating screw (806) is slidably connected to a pull rod (801), and the bottom of the pull rod (801) is connected to a baffle (802), and the baffle (802) is located inside a powder chamber opened inside the fixed box (4). The surface of the pull rod (801) is fixedly connected to a contact sheet (804), and the contact sheet (804) is in contact with the cam sleeve (803).

9. The grain grinding device according to claim 8, characterized in that: The interior of the fixed box (4) is provided with a slot (809) that cooperates with the baffle (802), the interior of the pull rod (801) is provided with a sliding groove (810), the rotating screw (806) is located inside the sliding groove (810), and the baffle (802) abuts against the surface of the lower grinding disc (702).

10. The grain grinding device according to claim 9, characterized in that: The upper grinding disc (701) is provided with a reflux groove (7012), the interior of the upper grinding disc (701) is provided with a reflux hole (7011), the reflux hole (7011) is connected to the grinding space, the bottom of the fixed box (4) is provided with an outlet groove, a collection box (5) is provided below the outlet groove, and the collection box (5) is fixed on the fixed box (4).

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