CN114669344A

CN114669344A - Two-dimensional regulation and control displacement mechanism for rice cutter

Info

Publication number: CN114669344A
Application number: CN202210454146.8A
Authority: CN
Inventors: 肖崇业; 王成; 彭紫恒
Original assignee: Wuhan Cofco Machinery Ezhou Co ltd
Current assignee: Wuhan Cofco Machinery Ezhou Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-06-28
Anticipated expiration: 2042-04-27
Also published as: CN114669344B

Abstract

The invention relates to a rice cutter two-dimensional regulation and displacement mechanism which comprises a mounting frame, a rice cutter assembly and a hollow sieve frame, wherein a sand roller is arranged inside the sieve frame, a rice milling cavity is formed between the sand roller and the inner wall of the sieve frame, the rice cutter assembly is arranged on the sieve frame, a lifting mechanism is arranged on the mounting frame, the lifting mechanism is connected with the rice cutter assembly and is used for regulating a gap between the rice cutter assembly and the sand roller, a driving mechanism is externally connected with the sieve frame and is used for driving the sieve frame to rotate and driving the rice cutter assembly to synchronously rotate, even after the rice cutter assembly is worn, the gap between the rice cutter assembly and the sand roller can be kept at a value capable of obtaining the best rice milling precision, the sieve frame and the rice cutter assembly are driven to rotate by the driving mechanism, rice grains are prevented from contacting with the rice cutter assembly when the speed is lower, and the technical problems that the rice milling rate of a rice mill is high and the quality of finished rice is poor in the prior art are solved.

Description

Two-dimensional regulation and control displacement mechanism for rice cutter

Technical Field

The invention relates to the technical field of rice mills, in particular to a two-dimensional regulation and displacement mechanism for a rice knife.

Background

The rice mill is a device for milling, peeling and whitening the brown rice by moving mechanical force. During rice milling, rice grains are positioned in a gap air-trapping between the rice knife and the sand roller. Two rice knives about being equipped with more in current rice mill, when the husk rice, take place the spiral by the screw propeller drive grain of rice and remove, when the grain of rice removes rice knife department, the grain of rice touches the rice knife and takes place the upset, thereby touches the emery roller and grinds the surface chaff of getting rid of on the grain of rice and emery roller contact site. Wherein, when the rice grain from bottom to top moves to the rice sword in-process on upper portion, rice grain speed reduces gradually, when the top of arrival circumference, when the rice sword department of top promptly, rice grain speed reduces to minimumly, causes the rice grain to pile up in clearance department between rice sword and sand roller, produces great internal stress between the rice grain, leads to broken rice increase in the rice grain of rolling out, and the rice grain quality reduces. In addition, after a period of rice milling, the rice cutter is easy to wear, so that the gap between the rice cutter and the sand roller is enlarged, and the rice milling precision is reduced. The existing rice mill increases the 'air-storage' internal pressure of a whitening chamber by pressurizing a pressure door of a discharge port, increases the density of rice grains, prolongs the grinding time of the rice grains in the whitening chamber and improves the whitening precision. But the mechanical stress of the rice grains is increased along with the increase of the 'air-storage' internal pressure of the whitening chamber, and the rice grains are broken when the mechanical stress exceeds the strength of the rice grains; the rice grains receive friction and collision and generate a large amount of heat, so that the surface temperature of the rice grains is increased, the heat is slowly transferred from the surface layer of the rice grains to the inside due to poor heat conductivity of the rice grains, the rice grains form large temperature gradient (namely temperature difference), the large temperature difference generates thermal stress in the rice grains, and the thermal stress exceeds the inherent strength of rice quality and enables the rice grains to break or explode, thereby increasing broken rice and reducing the rice yield.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a rice cutter two-dimensional regulation and displacement mechanism which can improve the quality of finished rice and reduce broken rice.

In order to solve the technical problem, the invention provides a two-dimensional rice cutter regulating and position changing mechanism which comprises a mounting frame, a rice cutter assembly and a hollow sieve frame, wherein a sand roller is arranged inside the sieve frame, a rice milling cavity is formed between the sand roller and the inner wall of the sieve frame, the rice cutter assembly is arranged on the sieve frame, a lifting mechanism is arranged on the mounting frame, the lifting mechanism is connected with the rice cutter assembly and used for regulating a gap between the rice cutter assembly and the sand roller, a driving mechanism is externally connected with the sieve frame, and the driving mechanism is used for driving the sieve frame to rotate and driving the rice cutter assembly to synchronously rotate.

After adopting the structure, the two-dimensional regulation and control displacement mechanism of the rice knife has the following advantages: the clearance between the rice cutter assembly and the sand roller is adjusted through the lifting mechanism, even after the rice cutter assembly is abraded, the clearance between the rice cutter assembly and the sand roller can be kept at a value which can obtain the optimal rice milling precision, and the adjusting mechanism can not cause the mechanical stress increase or the temperature rise of rice grains, so that broken rice is reduced, the rice yield is improved, and the quality of finished rice is greatly improved; in addition, through actuating mechanism drive bank of screens and rice knife tackle spare rotation, avoid the grain of rice to contact with rice knife tackle spare when speed is lower to reduce the accumulation volume of grain of rice in rice knife tackle spare department, reduce broken rice rate, improved the grain of rice quality.

As an improvement, the lifting mechanism comprises a first motor, a first screw rod and a screw cap, the first motor is arranged on the mounting frame, the output end of the first motor is connected with the first screw rod, the screw cap is arranged on the rice cutter assembly, the first screw rod is in threaded connection with the screw cap, and the axes of the first screw rod and the screw cap are both arranged along the radial direction of the sand roller; by adopting the structure, the first motor and the mounting frame are fixed, when the first motor drives the first screw rod to rotate, the screw cap vertically moves, so that the gap between the rice knife assembly and the sand roller can be changed, the gap between the rice knife assembly and the sand roller can be ensured to be in an ideal state capable of obtaining high-quality finished rice, and the rice milling precision is improved.

As an improvement, the rice knife assembly comprises a rice knife and a cross beam, the cross beam is positioned between the rice knife and the first motor, the cross beam is connected with the sieve frame, the screw cap is arranged on the rice knife, the cross beam is provided with a groove, the rice knife is clamped in the groove and can slide in the groove along the radial direction of the sand roller, the cross beam is provided with a first through hole, and the first screw penetrates through the first through hole to be connected with the screw cap; by adopting the structure, the groove can play a role in guiding the movement of the rice knife.

As an improvement, the lifting mechanism further comprises a second screw, a first gear and a second gear, the axis of the second screw is parallel to the first screw, the second screw is in threaded connection with the cross beam, one end of the second screw abuts against the rice cutter, the first gear is arranged on the first screw and rotates coaxially and synchronously with the first screw, the second gear is arranged on the second screw and rotates coaxially and synchronously with the second screw, the first gear and the second gear are meshed, and the transmission ratio is 1: 1; by adopting the structure, when the first screw rod is driven to rotate by the first motor, the second screw rod rotates reversely, the second screw rod and the cross beam are in threaded connection, so that the second screw rod and the rice cutter move in the same direction, and the second screw rod always supports against the rice cutter, so that the influence of the gap between the first screw rod and the nut due to the threaded connection can be eliminated, the moving distance of the rice cutter is more accurate, and the gap adjustment precision between the rice cutter and the sand roller is higher.

As an improvement, a second through hole is formed in the wall of the sieve frame and is arranged along the axial direction of the sieve frame, fixing frames extending to the outer side of the sieve frame are arranged on the inner walls of two sides of the second through hole in the width direction, the rice knife assembly is arranged between the two fixing frames, and the cross beam is connected with the two fixing frames; by adopting the structure, the stability of the connection of the rice knife assembly and the sieve frame is improved.

As an improvement, the outer wall of each fixed frame is connected with a supporting frame, and the supporting frame is connected with a cross beam; by adopting the structure, the connection strength of the screen frame and the cross beam is increased.

As an improvement, the driving mechanism comprises a second motor, a reduction gearbox, a driving gear and a driven gear, the output end of the second motor is connected with the driving gear through the reduction gearbox, the driving gear is meshed with the driven gear, and the driven gear and the sieve frame are coaxially arranged and synchronously rotate; by adopting the structure, the transmission mechanism has the advantages of simple structure and stable transmission.

As an improvement, the clearance d between the rice knife assembly and the sand roller ranges from 3mm to 10 mm; with this structure, if the clearance between the rice knife assembly and the sand roller is smaller than the transverse diameter of the rice grains, the rice grains are easy to break, and if the clearance is larger than the longitudinal diameter of the rice grains, the rice is not easy to roll out, so the clearance between the rice knife assembly and the sand roller is set to be 3mm to 10 mm.

As an improvement, three lifting mechanisms are arranged on the mounting frame at intervals transversely and are respectively used for changing the gaps between the two ends and the middle part of the rice knife assembly and the sand roller; by adopting the structure, the rice knife component is ensured to be in a horizontal state.

Drawings

FIG. 1 is a schematic view of a connection structure of a rice knife assembly and a sieve frame according to the present invention.

Fig. 2 is a partially enlarged view of a portion a in fig. 1.

Fig. 3 is a schematic view of the overall structure of the present invention.

Fig. 4 is a schematic structural view of the lifting mechanism of the present invention.

Fig. 5 is a partially enlarged view of a portion B in fig. 4.

FIG. 6 is a schematic view of the connection structure of the cross beam and the rice knife in the present invention.

Reference numerals: 1. a mounting frame; 2. a rice knife assembly; 21. rice knife; 22. a cross beam; 3. a screen frame; 4. a lifting mechanism; 41. a first motor; 42. a first screw; 43. a nut; 44. a second screw; 45. a first gear; 46. a second gear; 5. a drive mechanism; 51. a second motor; 52. a reduction gearbox; 53. a driving gear; 54. a driven gear; 6. a sand roller; 7. a groove; 8. a first through hole; 9. a second through hole; 10. a fixed mount; 11. a support frame; 12. a rice milling cavity.

Detailed Description

The two-dimensional regulating and displacing mechanism of the rice knife is explained in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 6, a rice knife two-dimensional regulation and control displacement mechanism, including mounting bracket 1, rice knife subassembly 2 and including hollow bank of screens 3, the inside sand roller 6 that is equipped with of bank of screens 3, wherein, bank of screens 3 is cylindricly, and sand roller 6 and the coaxial setting of bank of screens 3, form husk rice chamber 12 between sand roller 6 and the 3 inner walls of bank of screens, rice knife subassembly 2 is located on bank of screens 3, be equipped with elevating system 4 on mounting bracket 1, rice knife subassembly 2 is connected to elevating system 4 and is used for adjusting the clearance between rice knife subassembly 2 and the sand roller 6, the bank of screens 3 is external to have actuating mechanism 5, actuating mechanism 5 is used for driving bank of screens 3 to rotate and drives rice knife subassembly 2 synchronous rotation.

As shown in fig. 4 and 5, the lifting mechanism 4 includes a first motor 41, a first screw 42, a nut 43, a second screw 44, a first gear 45 and a second gear 46, the first motor 41 is disposed on the mounting frame 1, an output end of the first motor 41 is connected to the first screw 42, the nut 43 is disposed on the rice knife assembly 2, the first screw 42 is in threaded connection with the nut 43, and axes of the first screw 42 and the nut 43 are both disposed along a radial direction of the sand roller 6; the rice huller blade assembly 2 comprises a rice huller blade 21 and a cross beam 22, the cross beam 22 is positioned between the rice huller blade 21 and a first motor 41, the cross beam 22 is connected with the sieve frame 3, and a nut 43 is arranged on the rice huller blade 21, as shown in fig. 6, a groove 7 is formed in the cross beam 22, the rice huller blade 21 is clamped in the groove 7, and the rice huller blade 21 can slide in the groove 7 along the radial direction of the sand roller 6; in this embodiment, the groove 7 is provided at the lower end of the cross beam 22; a first through hole 8 is formed in the cross beam 22, and a first screw 42 penetrates through the first through hole 8 and is connected with a nut 43; the axis of the second screw 44 is parallel to the first screw 42, the second screw 44 is in threaded connection with the cross beam 22, one end of the second screw is abutted against the rice cutter 21, the first gear 45 is arranged on the first screw 42 and rotates coaxially and synchronously with the first screw 42, the second gear 46 is arranged on the second screw 44 and rotates coaxially and synchronously with the second screw 44, the first gear 45 is meshed with the second gear 46, and the transmission ratio is 1: 1; in this embodiment, the mounting bracket 1 is of a shell structure, the first motor 41 is disposed inside the mounting bracket 1, and the lower ends of the first screw 42 and the second screw 44 both penetrate through the mounting bracket 1 and are exposed below the mounting bracket 1.

As shown in fig. 4, three lifting mechanisms 4 are provided, and the three lifting mechanisms 4 are transversely arranged on the mounting frame 1 at intervals and are respectively used for changing the gaps between the two ends and the middle part of the rice knife assembly 2 and the sand roller 6, so that the rice knife 21 is in a horizontal state; wherein, the three lifting mechanisms 4 are preferably arranged near the two ends and the middle part of the rice knife 21.

As shown in fig. 1 and 2, a second through hole 9 is formed in the wall of the sieve frame 3, the second through hole 9 is axially arranged along the sieve frame 3, that is, the second through hole 9 is a long hole extending along the axial direction of the sieve frame 3, fixing frames 10 extending to the outer side of the sieve frame 3 are respectively arranged on the inner walls of two sides of the second through hole 9 in the width direction, the rice knife assembly 2 is arranged between the two fixing frames 10, and the cross beam 22 is connected with the two fixing frames 10; each fixing frame 10 is connected with a supporting frame 11 on the outer wall, the supporting frame 11 is connected with a cross beam 22, and in this embodiment, each supporting frame 11 is connected with the cross beam 22 through a bolt.

As shown in fig. 3, the driving mechanism 5 includes a second motor 51, a reduction gearbox 52, a driving gear 53 and a driven gear 54, wherein the second motor 51 is a right-angle gear reduction motor, the reduction gearbox 52 is a worm and gear reduction gearbox, the output end of the second motor 51 is connected to the driving gear 53 through the reduction gearbox 52, the driving gear 53 is engaged with the driven gear 54, and the driven gear 54 is coaxially arranged with the sieve frame 3 and synchronously rotates.

Since rice grains are easily broken if the clearance between the rice knife assembly 2 and the sand roller 6 is smaller than the lateral diameter of the rice grains and rice grains are not easily rolled out if the clearance is larger than the longitudinal diameter of the rice grains, the clearance d between the rice knife assembly 2 and the sand roller 6 is set to a range of 3mm to 10mm, and the clearance between the rice knife assembly 2 and the sand roller 6 described in the present embodiment, that is, the clearance between the rice knife 21 and the sand roller 6.

The invention is applied to the rice mill, and the positions of the rice knife 21, the sand roller 6 and the cross beam 22 in the rice mill and the connecting structure with the rice mill are all the prior art, and are not described again; wherein, as shown in fig. 1, be equipped with two rice knife tackle spares 2 on the bank of screens 3, and two rice knife tackle spares 2 circumference equidistance distribute on the bank of screens 3, correspondingly, be equipped with two second through-holes 9 on the bank of screens 3, all be equipped with mount 10 on the 9 both sides inner walls of every second through-hole, all be equipped with support frame 11 on the mount 10 outer wall, all be connected with elevating system 4 and the mounting bracket 1 that corresponds moreover on the rice knife tackle spare 2 of every side.

As shown in fig. 3, in the initial state, the two rice knife assemblies 2 are vertically arranged, and at this time, the axes of the first screw 42 and the screw cap 43 are both vertically arranged, and if the broken rice rate of the milled rice is found to be high, the driving mechanism 5 drives the sieve frame 3 to rotate, for example, the sieve frame 3 rotates 30 degrees counterclockwise, the rice knife assemblies 2 rotate synchronously, at this time, the included angle between the connecting line of the two rice knife assemblies 2 and the vertical direction is 30 degrees, and the speed is gradually reduced in the process of the rice grains moving from bottom to top, so that in the initial state, the rice grains are in the lowest speed state when contacting with the upper rice knife assembly 2, at this time, the rice grains are easy to accumulate at the upper rice knife assembly 2, and after the sieve frame 3 rotates 30 degrees counterclockwise, the speed when contacting with the upper rice knife assembly 2 is increased, the accumulation amount of the rice grains at the upper rice knife assembly 2 is reduced, the broken rice rate is reduced, and the rice grain quality is improved; if the broken rice rate is still higher, the sieve frame 3 can be further rotated in the counterclockwise direction. In addition, the rice milling cutter 21 is matched with the sand roller 6 to mill rice in the rice milling process, and after the rice milling cutter 21 is abraded, the gap between the rice milling cutter 21 and the sand roller 6 is increased, so that the rice milling precision is reduced; at the moment, the first motor 41 drives the first screw 42 to rotate, so that the screw cap 43 moves downwards, and the rice cutter 21 is driven to move downwards to reduce the gap between the rice cutter 21 and the sand roller 6; meanwhile, the second screw 44 rotates reversely relative to the first screw 42, and the second screw 44 is in threaded connection with the cross beam 22, so that the second screw 44 moves in the same direction as the rice cutter 21, and the second screw 44 always abuts against the rice cutter 21 to apply a downward force to the rice cutter 21, thereby eliminating the movement error of the rice cutter 21 caused by the threaded connection gap between the first screw 42 and the nut 43, so that the movement distance of the rice cutter 21 is more accurate, and the gap adjustment precision between the rice cutter 21 and the sand roller 6 is higher. The rice milling precision is improved by adjusting the gap between the rice knife 21 and the sand roller 6, the rice temperature cannot rise, the broken rice is less, the accumulation amount of the rice grains at the rice knife 21 is reduced by using the driving mechanism 5, the broken rice rate is further reduced, and the eating quality of the finished rice is greatly improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above-described embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.

Claims

1. The utility model provides a rice sword two dimension regulation and control displacement mechanism, its characterized in that includes mounting bracket (1), rice knife tackle spare (2) and hollow bank of screens (3), bank of screens (3) inside is equipped with sand roller (6), sand roller (6) with form rice milling chamber (12) between bank of screens (3) inner wall, rice knife tackle spare (2) are located on bank of screens (3), be equipped with elevating system (4) on mounting bracket (1), elevating system (4) are connected rice knife tackle spare (2) are used for adjusting rice knife tackle spare (2) with clearance between sand roller (6), bank of screens (3) are external to have actuating mechanism (5), actuating mechanism (5) are used for the drive bank of screens (3) are rotated and are driven rice knife tackle spare (2) rotate in step.

2. The rice knife two-dimensional regulation and control shifting mechanism of claim 1, wherein the lifting mechanism (4) comprises a first motor (41), a first screw (42) and a nut (43), the first motor (41) is arranged on the mounting frame (1), the output end of the first motor (41) is connected with the first screw (42), the nut (43) is arranged on the rice knife assembly (2), the first screw (42) is in threaded connection with the nut (43), and the axes of the first screw (42) and the nut (43) are radially arranged along the sand roller (6).

3. The rice huller blade two-dimensional control shifting mechanism as claimed in claim 2, wherein the rice huller blade assembly (2) comprises a rice huller blade (21) and a cross beam (22), the cross beam (22) is located between the rice huller blade (21) and the first motor (41), the cross beam (22) is connected with the screen frame (3), a nut (43) is arranged on the rice huller blade (21), a groove (7) is formed in the cross beam (22), the rice huller blade (21) is clamped in the groove (7) and the rice huller blade (21) can slide in the groove (7) along the sand roller (6) in a radial direction, a first through hole (8) is formed in the cross beam (22), and the first screw (42) penetrates through the first through hole (8) to be connected with the nut (43).

4. The rice knife two-dimensional regulation and displacement mechanism according to claim 3, wherein the lifting mechanism (4) further comprises a second screw (44), a first gear (45) and a second gear (46), the axis of the second screw (44) is parallel to the first screw (42), the second screw (44) is in threaded connection with the cross beam (22) and one end of the second screw abuts against the rice knife (21), the first gear (45) is arranged on the first screw (42) and rotates coaxially and synchronously with the first screw (42), the second gear (46) is arranged on the second screw (44) and rotates coaxially and synchronously with the second screw (44), and the first gear (45) is meshed with the second gear (46) and has a transmission ratio of 1: 1.

5. The rice huller blade two-dimensional regulation and control displacement mechanism of claim 3, wherein a second through hole (9) is formed in the wall of the sieve frame (3), the second through hole (9) is axially arranged along the sieve frame (3), fixing frames (10) extending to the outer side of the sieve frame (3) are arranged on the inner walls of two sides of the second through hole (9) in the width direction, the rice huller blade assembly (2) is arranged between the two fixing frames (10), and the cross beam (22) is connected with the two fixing frames (10).

6. The rice knife two-dimensional regulation and displacement mechanism according to claim 5, wherein a support frame (11) is connected to the outer wall of each fixing frame (10), and the support frame (11) is connected with the cross beam (22).

7. The rice knife two-dimensional regulation and displacement mechanism according to any one of claims 1 to 6, wherein the driving mechanism (5) comprises a second motor (51), a reduction gearbox (52), a driving gear (53) and a driven gear (54), the output end of the second motor (51) is connected with the driving gear (53) through the reduction gearbox (52), the driving gear (53) is meshed with the driven gear (54), and the driven gear (54) and the sieve frame (3) are coaxially arranged and synchronously rotate.

8. The rice knife two-dimensional regulation and displacement mechanism according to any one of claims 1 to 6, wherein the clearance d between the rice knife assembly (2) and the sand roller (6) ranges from 3mm to 10 mm.

9. The rice knife two-dimensional regulation and displacement mechanism according to any one of claims 1 to 6, characterized in that three lifting mechanisms (4) are provided, and the three lifting mechanisms (4) are transversely arranged on the mounting frame (1) at intervals and are respectively used for changing the gaps between the two ends and the middle part of the rice knife assembly (2) and the sand roller (6).