Grinding machine

Abstract

The invention relates to the technical field of grinding machines, in particular to a grinding machine which comprises a main machine, a grinding cup and a grinding cutter set, the grinding cup is installed on the main machine, the grinding cutter set is rotationally connected into the grinding cup and driven by the main machine to rotate, and the grinding cutter set comprises a rotating shaft, an upper blade and a lower blade, in the vertical projection direction, the upper blade and the lower blade are arranged at an angle of 90 degrees; the upper blade is twisted, and the included angle between the material facing surface of the upper blade and the horizontal plane is larger when the material facing surface of the upper blade faces outwards due to the twisting; the lower blade is in a horizontal shape which is gradually reduced from the middle to the tail end, and the tail end of the lower blade is provided with a warped edge which obliquely extends outwards and upwards; a plurality of collision protrusions are arranged on the inner wall of the grinding cup, and a plurality of collision protruding points are arranged on the bottom face of the grinding cup. According to the grinding machine, through the combination of the horizontal lower blade and the twisted upper blade, a more complex cutting path can be formed, so that the motion trail of materials in the grinding cup is complex and changeable, and the uniformity and consistency of ground products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of food processing equipment, in particular to a grinder. Background Art

[0002] As a common food processing equipment, grinders are widely used in the fields of material crushing, grinding and mixing. Their working principle is mainly to cut, impact and rub materials through high-speed rotating blades, so as to achieve material refinement, homogenization or modification. However, in the existing grinder design, the blades of the blade assembly generally only use horizontal blades. During the grinding process, due to the relatively single cutting method of the horizontal blade, the flow of materials in the grinder is restricted, and it is difficult to form an effective circulation, resulting in poor crushing uniformity of the material during the grinding process, and local over-grinding or under-grinding is prone to occur, thereby affecting the particle size distribution and uniformity of the final product. To this end, it is necessary to improve the existing technology to solve the above problems. Summary of the invention

[0003] The object of the present invention is to provide a grinder, aiming to solve the problem that the grinder in the prior art only uses horizontal blades, resulting in poor crushing uniformity of materials during the grinding process.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a grinding machine, including a main machine, a grinding cup and a grinding knife group, the grinding cup is installed on the main machine, the grinding knife group is rotatably connected in the grinding cup and driven to rotate by the main machine, the grinding knife group includes a rotating shaft and an upper blade and a lower blade arranged on the rotating shaft; in the upper and lower projection directions, the upper blade and the lower blade are arranged at 90 degrees; the upper blade is twisted and the twisting makes the angle between the material-facing surface of the upper blade and the horizontal plane larger as it moves outward; the lower blade is horizontal and gradually narrows from the middle to the end, and the end of the lower blade is provided with a warped edge extending obliquely in an outward and upward direction; the inner wall of the grinding cup is provided with a plurality of collision protrusions, and the bottom surface of the grinding cup is provided with a plurality of collision convex points.

[0005] Furthermore, the upper blade is obtained by shortening and rotating the central section of the upper blade at the center and smoothing it along a straight line radially outward; the upper blade is respectively cut with a plane parallel to the central section at the center to obtain characteristic sections one, two, three and four; the central section includes a section material-facing line and a section material-backing line, both of which are straight lines, and the two sides of the section material-facing line and the section material-backing line are respectively connected by means of the front edge of the section and the rear edge of the section, and after a smooth transition, the section material-facing line, the section material-backing line, the front edge of the section and the rear edge of the section are respectively smoothed into the material-facing surface, the material-backing surface, the blade and the back of the blade of the upper blade; In the process of smoothing from the center section of the upper blade to the characteristic section one, the scaling of the section material contact line is equal; in the process of smoothing from the characteristic section one to the characteristic section two, the characteristic section three and the characteristic section four, the scaling of the section material contact line is gradually shortened.

[0006] Furthermore, the length L1 of the cross-section material receiving line of the central section is 16mm-20mm, the length L2 of the cross-section material receiving line of the characteristic section one is 16mm-20mm, the length L3 of the cross-section material receiving line of the characteristic section two is 12mm-16mm, the length L4 of the cross-section material receiving line of the characteristic section three is 7mm-11mm, and the length L5 of the cross-section material receiving line of the characteristic section four is 2mm-6mm.

[0007] Furthermore, the angle ∠1 between the section feed line of the characteristic section one and the section feed line of the central section is 0°, the angle ∠2 between the section feed line of the characteristic section two and the section feed line of the central section is 7°-11°, the angle ∠3 between the section feed line of the characteristic section three and the section feed line of the central section is 26°-30°, and the angle ∠4 between the section feed line of the characteristic section four and the section feed line of the characteristic section is 32°-37°.

[0008] Furthermore, the angle ∠5 between the warped edge and the horizontal plane is 90°-100°.

[0009] Furthermore, in the up and down projection direction, the outer contour of one side of the lower blade includes an upper flat section, an upper right inclined section, a right curved section, a right vertical section, a right inclined section, a lower right inclined section and a lower flat section connected in sequence.

[0010] Furthermore, the angle ∠6 between the upper right inclined section and the upper flat section and the angle ∠7 between the lower right inclined section and the lower flat section are both 6°-10°.

[0011] Furthermore, the diameter D1 of the grinding cup is 130mm-135mm, the collision protrusion is triangular and the protruding distance D2 is 2mm-4mm, the rotation diameter D3 of the upper blade is 75mm-85mm, and the rotation diameter D4 of the lower blade is 110mm-115mm; the distance D5 between the collision protrusion and the bottom of the inner wall of the grinding cup is 7mm-9mm; the distance D6 between the lower blade and the bottom of the inner wall of the grinding cup is 5mm-7mm, and the distance D7 between the upper blade and the lower blade is 7mm-9mm; the length L6 of the collision protrusion is 65mm-75mm; the bottom surface of the grinding cup is provided with two circles of collision protrusions, and the first circle of collision protrusions is 10mm-115mm in diameter. 1 is a 45mm-55mm circular ring distributed on the bottom of the grinding cup, and the second circle of collision convex points is 2 is a circular ring with a circumference of 95mm-105mm distributed on the bottom surface of the grinding cup, the collision convex point is conical and the protruding distance D8 is 3mm-4mm.

[0012] Furthermore, the thickness T1 of the upper blade is 1 mm-2 mm; the thickness T2 of the lower blade is 1.5 mm-2.5 mm.

[0013] Furthermore, the main machine is provided with a function control module, which is provided with a plurality of food gears, a coarse grinding gear and a fine grinding gear. Under the coarse grinding gear and the fine grinding gear of different food gears, the function control module controls the grinding knife group to rotate at different rhythms so as to grind the food to a desired degree. The different rhythms are that the grinding knife group is controlled to work in multiple time periods, and within different time periods, the grinding knife group rotates at a specific direction, a specific speed, for a specific time, and then pauses for a specific time.

[0014] Compared with the prior art, the grinder provided by the present invention can form a more complex cutting path through the combination of a horizontal lower blade and a twisted upper blade, and make the material produce a more complex up and down displacement, so that the movement trajectory of the material in the grinding cup is complex and changeable, effectively covering the grinding area, avoiding the situation of local over-grinding or under-grinding of the material during the grinding process, thereby improving the uniformity and consistency of the ground product. At the same time, during the grinding process, the material rotates with the grinding knife group and collides with the collision protrusions on the inner wall of the grinding cup and the collision protrusions on the bottom surface. Under the impact, the material rebounds radially, increasing the contact opportunity between the material and the grinding knife group, so that the grinding knife group can more fully cut, squeeze and impact the material, thereby accelerating the crushing and grinding process of the material, which is conducive to improving the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a cross-sectional view of the present invention; Figure 3 is a cross-sectional view of the grinding cup and the grinding knife assembly; Figure 4 It is a top view of the grinding cup and the grinding knife set; Figure 5 It is a top view of the grinding cup; Figure 6 It is a three-dimensional structural schematic diagram of the grinding knife set; Figure 7 is a top view of the lower blade; Figure 8 is a front view of the lower blade; Figure 9 It is a three-dimensional structural schematic diagram of the upper blade; Figure 10is a top view of the upper blade; Figure 11 yes Figure 10 Sectional view at AA in the middle; Figure 12 yes Figure 10 Sectional view at the middle BB; Figure 13 yes Figure 10 Sectional view at CC; Figure 14 yes Figure 10 Sectional view at DD in the middle; Figure 15 yes Figure 10 Sectional view at EE; Figure 16 It is a schematic diagram of the functional control module.

[0016] Description of reference numerals: 1. Host; 2. Grinding cup; 21. Collision bulge; 22. Collision bulge; 3. Grinding knife set; 4. Rotating shaft; 5. Upper blade; 51. Cross-section material-facing line; 52. Cross-section material-backing line; 53. Cross-section front edge; 54. Cross-section back edge; 55. Cross-section material-facing surface; 56. Material-backing surface; 57. Blade; 58. Blade back; 6. Lower blade; 60. Warped edge; 61. Upper flat section; 62. Upper right slanted section; 63. Right-warped arc section; 64. Right-warped vertical section; 65. Right-warped slanted section; 66. Lower right slanted section; 67. Lower flat section. DETAILED DESCRIPTION

[0017] The present invention is described in detail below in conjunction with specific embodiments.

[0018] In the present invention, unless otherwise clearly specified and limited, when terms such as "set on", "connected", and "connected" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through one or more intermediate media. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The directional words that appear in the present invention are to better illustrate the characteristics of the features and the relationship between the features. It should be understood that when the placement direction of the present invention changes, the characteristics of the features and the direction of the relationship between the features also change accordingly. Therefore, the directional words do not constitute an absolute limitation on the characteristics of the features and the relationship between the features in space, but only play a relative limitation role.

[0019] The present invention provides a grinding machine, such as Figures 1 to 16As shown, it includes a main machine 1, a grinding cup 2 and a grinding knife group 3, the grinding cup 2 is installed on the main machine 1, the grinding knife group 3 is rotatably connected in the grinding cup 2 and driven to rotate by the main machine 1, and the grinding knife group 3 includes a rotating shaft 4 and an upper blade 5 and a lower blade 6 arranged on the rotating shaft 4; in the upper and lower projection directions, the upper blade 5 and the lower blade 6 are arranged at 90 degrees; the upper blade 5 is twisted and the twisting makes the angle between the material-facing surface 55 of the upper blade 5 and the horizontal plane larger as it moves outward; the lower blade 6 is horizontal and gradually narrows from the middle to the end, and the end of the lower blade 6 is provided with a warping edge 60 extending obliquely in the outward and upward direction. The setting of the warping edge 60 enables the lower blade 6 to cover a wider area when cutting or grinding, thereby increasing the contact area with the material and improving the cutting or grinding efficiency; the inner wall of the grinding cup 2 is provided with a plurality of collision protrusions 21, and the bottom surface of the grinding cup 2 is provided with a plurality of collision convex points 22.

[0020] Based on the above structural setting, this type of grinder can form a more complex cutting path through the combination of the horizontal lower blade 6 and the twisted upper blade 5, and make the material produce more complex up and down displacement, so that the movement trajectory of the material in the grinding cup 2 is complex and changeable, effectively covering the grinding area, avoiding the situation of local over-grinding or under-grinding of the material during the grinding process, thereby improving the uniformity and consistency of the ground product. At the same time, during the grinding process, the material rotates with the grinding knife group 3 and collides with the collision protrusion 21 on the inner wall of the grinding cup 2 and the collision protrusion 22 on the bottom surface. Under the impact, the material rebounds radially, increasing the contact opportunity between the material and the grinding knife group 3, so that the grinding knife group 3 can more fully cut, squeeze and impact the material, thereby accelerating the crushing and grinding process of the material, which is conducive to improving the grinding efficiency.

[0021] It is easy to understand that, like the prior art, the upper blade 5 and the lower blade 6 are both of a centrally symmetrical structure, so the blade is described in this embodiment by only describing one half of it, and the other half is centrally symmetrical with the one half.

[0022] In this embodiment, if Figure 10 As shown, the upper blade 5 is obtained by shortening, rotating and smoothing the central section (AA) of the upper blade 5 at the center; Figure 10 H1 in), 20mm ( Figure 10 H2), 30mm ( Figure 10 H3) and 40mm ( Figure 10The upper blade 5 is cut at the position of H4 in the figure, and the plane parallel to the central section (AA) located at the center is used to cut the upper blade 5 respectively to obtain characteristic sections 1 (BB), 2 (CC), 3 (DD) and 4 (EE); the central section (AA) includes a section material-facing line 51 and a section material-backing line 52, and both the section material-facing line 51 and the section material-backing line 52 are straight lines. The two sides of the section material-facing line 51 and the section material-backing line 52 are connected by the front side 53 and the rear side 54 of the section, and the smooth transition is performed. Afterwards, the cross-section material-facing line 51, the cross-section material-backing line 52, the cross-section front edge 53 and the cross-section rear edge 54 are respectively smoothed into the material-facing surface 55, the material-backing surface 56, the blade 57 and the blade back 58 of the upper blade 5; in the process of smoothing from the central cross section (AA) of the upper blade 5 to the characteristic cross section 1 (BB), the cross-section material-facing line 51 is scaled to be equal; in the process of smoothing from the characteristic cross section 1 (BB) to the characteristic cross section 2 (CC), the characteristic cross section 3 (DD) and the characteristic cross section 4 (EE), the cross-section material-facing line 51 is scaled to be gradually shortened. Except for the upper characteristic cross section, other positions are smooth transitions. When the twisted upper blade 5 rotates, due to the special shape, it can generate lifting force and radial outward thrust, so that the material keeps rolling in the grinding cup 2, so as to avoid the fixed stratification of the material, resulting in only a part of the material always contacting the blade while the other part of the material cannot contact the blade, further promoting the uniform refinement of the material.

[0023] In this embodiment, if Figures 11 to 15 As shown, the length L1 of the cross-section feed line 51 of the center section (AA) is 16mm-20mm, and further preferably, the length L1 of the cross-section feed line 51 of the center section (AA) is 18mm; the length L2 of the cross-section feed line 51 of the characteristic section one (BB) is 16mm-20mm, and further preferably, the length L2 of the cross-section feed line 51 of the characteristic section one (BB) is 18mm; the length L3 of the cross-section feed line 51 of the characteristic section two (CC) is 12mm-16mm, and further preferably, the length L3 of the cross-section feed line 51 of the characteristic section two (CC) is 14mm; the length L4 of the cross-section feed line 51 of the characteristic section three (DD) is 7mm-11mm, and further preferably, the length L4 of the cross-section feed line 51 of the characteristic section three (DD) is 9.5mm; the length L5 of the cross-section feed line 51 of the characteristic section four (EE) is 2mm-6mm, and further preferably, the length L5 of the cross-section feed line 51 of the characteristic section four (EE) is 4mm.

[0024] In this embodiment, if Figures 12 to 15As shown, the angle ∠1 between the cross-section feed line 51 of the characteristic cross section 1 (BB) and the cross-section feed line 51 of the central cross section (AA) is 0°; the angle ∠2 between the cross-section feed line 51 of the characteristic cross section 2 (CC) and the cross-section feed line 51 of the central cross section (AA) is 7°-11°, and further preferably, the angle ∠2 between the cross-section feed line 51 of the characteristic cross section 2 (CC) and the cross-section feed line 51 of the central cross section (AA) is 9°; the angle ∠2 between the cross-section feed line 51 of the characteristic cross section 3 (DD) and the cross-section feed line 51 of the central cross section (AA) is 9°. The angle ∠3 between the material lines 51 is 26°-30°, and further preferably, the angle ∠3 between the cross-section material line 51 of the characteristic section three (DD) and the cross-section material line 51 of the central section (AA) is 28°; the angle ∠4 between the cross-section material line 51 of the characteristic section four (EE) and the cross-section material line 51 of the central section (AA) is 32°-37°, and further preferably, the angle ∠4 between the cross-section material line 51 of the characteristic section four (EE) and the cross-section material line 51 of the central section (AA) is 35°.

[0025] The above-mentioned length and angle settings are the best choices to achieve the best grinding effect.

[0026] In this embodiment, if Figure 8 As shown, the angle ∠5 between the warped edge 60 and the horizontal plane is 90°-100°. More preferably, the angle ∠5 between the warped edge 60 and the horizontal plane is 95°.

[0027] In this embodiment, if Figure 7 As shown, in the upper and lower projection directions, the outer contour of one side of the lower blade 6 includes an upper flat section 61, an upper right inclined section 62, a right curved section 63, a right vertical section 64, a right inclined section 65, a lower right inclined section 66 and a lower flat section 67 connected in sequence.

[0028] In this embodiment, if Figure 7 As shown, the angle ∠6 between the upper right inclined section 62 and the upper flat section 61 and the angle ∠7 between the lower right inclined section 66 and the lower flat section 67 are both 6°-10°. Further preferably, the angle ∠6 between the upper right inclined section 62 and the upper flat section 61 and the angle ∠7 between the lower right inclined section 66 and the lower flat section 67 are both 8°.

[0029] Through the above structural design, the grinding effect of the lower blade 6 is better.

[0030] In this embodiment, if Figure 3 , Figure 4 and Figure 5As shown, the diameter D1 of the grinding cup 2 is 130mm-135mm, and further preferably, the diameter D1 of the grinding cup 2 is 132mm; the collision protrusion 21 is triangular and the protruding distance D2 is 2mm-4mm, and further preferably, the protruding distance D2 of the collision protrusion 21 is 3mm; the rotation diameter D3 of the upper blade 5 is 75mm-85mm, and further preferably, the rotation diameter D3 of the upper blade 5 is 80mm; the rotation diameter D4 of the lower blade 6 is 110mm-115mm, and further preferably, the rotation diameter D4 of the lower blade 6 is 112mm; the distance D5 between the collision protrusion 21 and the bottom of the inner wall of the grinding cup 2 is 7mm-9mm, Further preferably, the distance D5 between the collision protrusion 21 and the bottom of the inner wall of the grinding cup 2 is 8mm; the distance D6 between the lower blade 6 and the bottom of the inner wall of the grinding cup 2 is 5mm-7mm, and further preferably, the distance D6 between the lower blade 6 and the bottom of the inner wall of the grinding cup 2 is 6mm; the distance D7 between the upper blade 5 and the lower blade 6 is 7mm-9mm, and further preferably, the distance D7 between the upper blade 5 and the lower blade 6 is 8mm; the length L6 of the collision protrusion 21 is 65mm-75mm, and further preferably, the length L6 of the collision protrusion 21 is 70mm; the bottom surface of the grinding cup 2 is provided with two circles of collision protrusions 22, and the first circle of collision protrusions 22 is 1.5mm in diameter. 1 is a circular ring with a circumference of 45mm-55mm distributed on the bottom surface of the grinding cup 2. Further preferably, the first circle of collision convex points 22 is with a diameter of 1 is a 50 mm circular ring distributed on the bottom surface of the grinding cup 2; the second circle collision convex point 22 is a 50 mm circular ring distributed on the bottom surface of the grinding cup 2; 2 is a circular ring with a circumference of 95mm-105mm distributed on the bottom surface of the grinding cup 2. Further preferably, the second circle of collision convex points 22 is with a diameter of 2 is distributed on the bottom surface of the grinding cup 2 with a circumference of 100 mm; the collision convex point 22 is conical and the protruding distance D8 is 3 mm-4 mm, and more preferably, the collision convex point 22 is conical and the protruding distance D8 is 3.5 mm. The above parameter settings can improve the uniformity of the particle size and stable quality of the ground material, and can also improve the grinding efficiency and reduce the grinding time and energy consumption.

[0031] In this embodiment, if Figure 8 and Figure 11 As shown, the thickness T1 of the upper blade 5 is 1mm-2mm, and more preferably, the thickness T1 of the upper blade 5 is 1.5mm; the thickness T2 of the lower blade 6 is 1.5mm-2.5mm, and more preferably, the thickness T2 of the lower blade 6 is 2mm. The above blade thickness makes the blade have higher strength, can withstand greater grinding pressure and impact force, is not easy to deform or damage, and helps to maintain the stability and accuracy of the grinder. In addition, the size relationship of the grinding cup 2 and the above specific blade size have a better grinding effect.

[0032] In this embodiment, if Figure 16 As shown, the host 1 is provided with a function control module, and the function control module is provided with multiple food gears, coarse grinding gears and fine grinding gears. Under different food gears, the function control module controls the grinding knife group 3 to rotate at different rhythms so as to grind the food to a desired degree. The different rhythms are that the grinding knife group 3 is controlled to work in multiple time periods, and in different time periods, the grinding knife group 3 rotates at a specific direction, a specific speed, for a specific time, and then pauses for a specific time.

[0033] Specifically, the food stalls include rice stall, coix seed stall, sesame stall, pepper stall, red bean stall, mung bean stall, lotus seed stall, peanut stall, Panax notoginseng stall, donkey-hide gelatin stall, Panax notoginseng stall, yam stall, cinnamon stall, ginseng stall, dried chili stall, star anise stall, coffee bean stall and rock sugar stall.

[0034] When the rice gear, barley gear, sesame gear or pepper gear is selected, in the coarse grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 2 seconds and stops for 1 second, and stops after the above three cycles; in the fine grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 3 seconds and stops for 1 second, and stops after the above three cycles, and finally runs clockwise at a maximum speed of 20,000 r / min for 20 seconds and stops.

[0035] When the red bean gear, mung bean gear, lotus seed gear or peanut gear is selected, in the coarse grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 2 seconds and stops for 1 second, then runs clockwise at a low speed of 10,000 r / min for 2 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 3 seconds and stops; in the fine grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 3 seconds and stops for 1 second, then runs clockwise at a medium speed of 15,000 r / min for 3 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 20 seconds and stops.

[0036] When the Tianqi gear, Ejiao gear or Panax notoginseng gear is selected, in the coarse grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 3 seconds and stops for 1 second, then runs counterclockwise at a maximum speed of 20,000 r / min for 3 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 20 seconds and stops; in the fine grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 6 seconds and stops for 1 second, then runs counterclockwise at a maximum speed of 20,000 r / min for 6 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 30 seconds and stops.

[0037] When the yam gear, cinnamon gear or ginseng gear is selected, in the coarse grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 3 seconds and stops for 1 second, then runs counterclockwise at a medium speed of 15,000 r / min for 3 seconds and stops for 1 second, and performs the above two cycles, and finally runs clockwise at a maximum speed of 20,000 r / min for 10 seconds and stops; in the fine grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 6 seconds and stops for 1 second, then runs counterclockwise at a maximum speed of 20,000 r / min for 6 seconds and stops for 1 second, and performs the above two cycles, and finally runs clockwise at a maximum speed of 20,000 r / min for 20 seconds and stops.

[0038] When the dried chili gear or the star anise gear is selected, in the coarse grinding gear, the grinding knife group 3 first runs clockwise at a medium speed of 15000 r / min for 3 seconds and stops for 1 second, then runs counterclockwise at a low speed of 10000 r / min for 3 seconds and stops for 1 second, and performs the above two cycles, and finally runs clockwise at a medium speed of 15000 r / min for 10 seconds and stops; in the fine grinding gear, the grinding knife group 3 first runs clockwise at a medium speed of 15000 r / min for 6 seconds and stops for 1 second, then runs counterclockwise at a low speed of 10000 r / min for 6 seconds and stops for 1 second, and performs the above two cycles, and finally runs clockwise at a medium speed of 15000 r / min for 8 seconds and stops.

[0039] When the coffee bean gear is selected, in the coarse grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 2 seconds and stops for 1 second, then runs clockwise at a medium speed of 15,000 r / min for 2 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 6 seconds and stops; in the fine grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 5 seconds and stops for 1 second, then runs clockwise at a medium speed of 15,000 r / min for 5 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 30 seconds and stops.

[0040] When the rock sugar gear is selected, in the coarse grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 3 seconds and stops for 1 second, then runs clockwise at a low speed of 10,000 r / min for 2 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 6 seconds and stops; in the fine grinding gear, the grinding knife group 3 first runs clockwise at a maximum speed of 20,000 r / min for 5 seconds and stops for 1 second, then runs clockwise at a low speed of 15,000 r / min for 5 seconds and stops for 1 second, and finally runs clockwise at a maximum speed of 20,000 r / min for 30 seconds and stops.

[0041] Under the control of the function control module, in combination with the grinding cup 2 and the grinding knife set 3 provided in this embodiment, experiments have shown that the above grinding rhythm can achieve the best grinding effect.

[0042] In summary, this type of grinder can solve the problem in the prior art that grinders only use horizontal blades, resulting in poor crushing uniformity of materials during the grinding process.

[0043] In the absence of conflict, the above-mentioned embodiments and features thereof may be combined with each other.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A grinding machine, comprising a main machine (1), a grinding cup (2) and a grinding knife group (3), wherein the grinding cup (2) is mounted on the main machine (1), and the grinding knife group (3) is rotatably connected to the grinding cup (2) and driven to rotate by the main machine (1), characterized in that: The grinding blade assembly (3) comprises a rotating shaft (4) and an upper blade (5) and a lower blade (6) arranged on the rotating shaft (4); in the vertical projection direction, the upper blade (5) and the lower blade (6) are arranged at 90 degrees; the upper blade (5) is twisted and the twist causes the angle between the material-facing surface (55) of the upper blade (5) and the horizontal plane to increase as it moves outward; the lower blade (6) is horizontal and gradually narrows from the middle to the end, and the end of the lower blade (6) is provided with a warped edge (60) extending obliquely in an outward and upward direction; the inner wall of the grinding cup (2) is provided with a plurality of collision protrusions (21), and the bottom surface of the grinding cup (2) is provided with a plurality of collision convex points (22).

2. The grinding machine according to claim 1, characterized in that: The upper blade (5) is obtained by shortening and rotating the central section at the center of the upper blade (5) and smoothing the straight line radially outward; the upper blade (5) is cut with a plane parallel to the central section at the center to obtain characteristic sections one, two, three and four; the central section includes a section material-facing line (51) and a section material-receiving line (52); the section material-facing line (51) and the section material-receiving line (52) are both straight lines; the two sides of the section material-facing line (51) and the section material-receiving line (52) are connected by means of a section front edge (53) and a section rear edge (54); after smooth transition, the section material-facing line (51), the section material-receiving line (52), the section front edge (53) and the section rear edge (54) are smoothed into a material-facing surface (55), a material-receiving surface (56), a blade (57) and a blade back (58) of the upper blade (5); In the process of smoothing from the central section of the upper blade (5) to the characteristic section 1, the scaling of the section material-facing line (51) is equal in size; In the process of smoothing from the characteristic section 1 to the characteristic section 2, the characteristic section 3 and the characteristic section 4, the scaling of the section material-meeting line (51) is gradually shortened.

3. The grinding machine according to claim 2, characterized in that: The length L1 of the cross-sectional material receiving line (51) of the central cross-section is 16mm-20mm, the length L2 of the cross-sectional material receiving line (51) of the characteristic cross-section one is 16mm-20mm, the length L3 of the cross-sectional material receiving line (51) of the characteristic cross-section two is 12mm-16mm, the length L4 of the cross-sectional material receiving line (51) of the characteristic cross-section three is 7mm-11mm, and the length L5 of the cross-sectional material receiving line (51) of the characteristic cross-section four is 2mm-6mm.

4. The grinding machine according to claim 3, characterized in that: The angle ∠1 between the cross-section feed line (51) of the characteristic section one and the cross-section feed line (51) of the central section is 0°, the angle ∠2 between the cross-section feed line (51) of the characteristic section two and the cross-section feed line (51) of the central section is 7°-11°, the angle ∠3 between the cross-section feed line (51) of the characteristic section three and the cross-section feed line (51) of the central section is 26°-30°, and the angle ∠4 between the cross-section feed line (51) of the characteristic section four or five and the cross-section feed line (51) of the central section is 32°-37°.

5. The grinding machine according to claim 1, characterized in that: The angle ∠5 between the warped edge (60) and the horizontal plane is 90°-100°.

6. The grinding machine according to claim 1, characterized in that: In the up and down projection direction, the outer contour of one side of the lower blade (6) comprises an upper flat section (61), an upper right inclined section (62), a right curved section (63), a right vertical section (64), a right inclined section (65), a lower right inclined section (66) and a lower flat section (67) which are connected in sequence.

7. The grinding machine according to claim 6, characterized in that: The angle ∠6 between the upper right inclined section (62) and the upper flat section (61) and the angle ∠7 between the lower right inclined section (66) and the lower flat section (67) are both 6°-10°.

8. The grinding machine according to claim 1, characterized in that: The diameter D1 of the grinding cup (2) is 130 mm to 135 mm, the collision protrusion (21) is triangular and the protrusion distance D2 is 2 mm to 4 mm, the rotation diameter D3 of the upper blade (5) is 75 mm to 85 mm, and the rotation diameter D4 of the lower blade (6) is 110 mm to 115 mm; The distance D5 between the collision protrusion (21) and the bottom of the inner wall of the grinding cup (2) is 7 mm to 9 mm; the distance D6 between the lower blade (6) and the bottom of the inner wall of the grinding cup (2) is 5 mm to 7 mm; the distance D7 between the upper blade (5) and the lower blade (6) is 7 mm to 9 mm; the length L6 of the collision protrusion (21) is 65 mm to 75 mm; The bottom surface of the grinding cup (2) is provided with two circles of collision convex points (22), the first circle of collision convex points (22) having a diameter of 1 is a circular ring with a circumference of 45mm-55mm distributed on the bottom surface of the grinding cup (2), and the second circle of collision convex points (22) is with a diameter of 2 is a circular ring with a circumference of 95mm-105mm distributed on the bottom surface of the grinding cup (2), and the collision convex point (22) is conical and the protruding distance D8 is 3mm-4mm.

9. The grinding machine according to claim 1, characterized in that: The thickness T1 of the upper blade (5) is 1 mm to 2 mm; the thickness T2 of the lower blade (6) is 1.5 mm to 2.5 mm.

10. The grinding machine according to claim 1, characterized in that: The main machine (1) is provided with a function control module, which is provided with a plurality of food gears, a coarse grinding gear and a fine grinding gear. In different food gears, the function control module controls the grinding knife group (3) to rotate at different rhythms so as to grind the food to a desired degree. The different rhythms are that the grinding knife group (3) is controlled to work in multiple time periods. In different time periods, the grinding knife group (3) rotates at a specific direction, a specific speed, for a specific time, and then pauses for a specific time.

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