CN113180500B - Vertical straight row grinding knife set - Google Patents

Abstract

The invention discloses a vertical type direct-row grinding knife set, which comprises an upper grinding knife, an inner grinding knife and a lower grinding knife, wherein the upper grinding knife is annular, and the inner grinding knife is arranged at the upper end of the lower grinding knife and is positioned in the upper grinding knife; the first upper grinding tooth groove of the upper grinding knife and the first inner grinding tooth groove of the inner grinding knife form a leading-in crushing gap, an axial grinding gap is formed between the second upper grinding tooth groove of the upper grinding knife and the second inner grinding tooth groove of the inner grinding knife, the upper conical teeth on the bottom surface of the upper grinding knife and the lower conical teeth on the upper surface of the lower grinding knife are in staggered fit along the radial direction to form a circumferential grinding gap, a powder discharging channel is formed between adjacent upper conical teeth and adjacent lower conical teeth in the axial grinding gap, and materials enter from the leading-in crushing gap and are discharged from the powder discharging channel after being subjected to multi-face cutting of the axial grinding gap and the circumferential grinding gap. The coffee powder grinding machine can realize the material guiding input of materials, has good coffee particle uniformity and more tangent plane surfaces, and achieves higher grinding quality.

Description

Vertical straight row grinding knife set

Technical Field

The invention relates to the technical field of grinding cutters, in particular to a vertical in-line grinding knife tackle.

Background

Coffee has become one of daily drinks of people, and compared with instant coffee, the freshly ground coffee is prepared by directly grinding coffee beans into coffee powder and then brewing and extracting, the materials are natural, the quality of the coffee beans is easy to control, substances in the coffee are continuously lost along with the lengthening of oxidation time, and the freshly ground coffee can play a role in refreshing.

When coffee beans are ground into coffee powder, the coffee beans are ground into coffee powder, manual or electric grinding equipment is adopted for the grinding, a grinding cutter is a core component of the grinding equipment, the particle size, the particle uniformity and the particle shape of the coffee powder can influence the taste of coffee brewing, therefore, the grinding cutter for grinding the coffee beans and foods such as the coffee beans has higher requirements, for example, the Chinese patent publication No. CN201977614U discloses a tooth-shaped cutting and forming coffee grinding cutter which comprises an upper cutter and a lower cutter which are made of stainless steel with the specification of SUS420, wherein the upper cutter is in a ring shape, the lower cutter is provided with two stages of grinding teeth with increased density, and correspondingly, the inner wall of the upper cutter is provided with two stages of grinding teeth with increased density; the stainless steel coffee grinding knife can solve the rust-proof problem and can meet the powder requirement by adopting the structure that a pair of upper knives and lower knives are matched for use and two stages of grinding teeth with gradually increased density are correspondingly arranged.

The grinding knife is characterized in that the grinding knife has poor uniformity of coffee bean cutting particles, the coffee particles are distributed in a sheet shape and have few cutting surfaces, and the coffee particles cannot be rapidly discharged so as to be extruded in a channel to generate micro powder particles; in order to solve the technical defects, a grinding cutterhead shown in fig. 1 and 2 is adopted, and the grinding cutterhead has a multi-layer cutting structure and can rapidly discharge cut coffee particles; however, the grinding cutterhead is fed from the center hole, the grinding cutterhead does not have feeding and inputting capability, and a feeding structure is required to be arranged above the center hole, so that the feeding direction of coffee beans is along the axial direction of the center hole, the grinding powder discharging channels of the grinding cutterhead are outwards distributed along the radial direction of the center hole, the grinding powder discharging channels are approximately perpendicular to each other, and feeding and grinding cannot be well matched with each other, so that grinding quality and grinding efficiency are affected.

Disclosure of Invention

The invention aims to solve the technical problem of providing the vertical type in-line grinding knife set, which can realize guiding input, so that the residence time of coffee particles in the grinding knife set is in a reasonable interval, and the coffee particles are good in uniformity and have more section surfaces, thereby achieving higher grinding quality.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the invention provides a vertical type in-line grinding knife set, which comprises an upper grinding knife, an inner grinding knife and a lower grinding knife, wherein the upper grinding knife is annular, and the inner grinding knife is arranged at the upper end of the lower grinding knife and is positioned in the upper grinding knife;

the inner wall of the upper grinding cutter is sequentially provided with a first upper grinding tooth groove and a second upper grinding tooth groove, the outer wall of the inner grinding cutter is sequentially provided with a first inner grinding tooth groove and a second inner grinding tooth groove corresponding to the first upper grinding tooth groove and the second upper grinding tooth groove, and the bottom surface of the upper grinding cutter and the upper surface of the lower grinding cutter are respectively provided with more than one circle of upper conical teeth and lower conical teeth;

the first upper grinding tooth groove and the first inner grinding tooth groove form a leading-in crushing gap, the second upper grinding tooth groove and the second inner grinding tooth groove form an axial grinding gap, the upper conical teeth and the lower conical teeth are in staggered fit along the radial direction to form a circumferential grinding gap, powder discharging channels are formed between the adjacent upper conical teeth and between the adjacent lower conical teeth in the axial grinding gap, and materials enter from the leading-in crushing gap and are discharged from the powder discharging channels after being subjected to multi-face cutting of the axial grinding gap and the circumferential grinding gap.

Furthermore, the leading-in crushing gap is obliquely distributed in an inverted cone shape from the upper end to the central line, the axial grinding gap and the circumferential grinding gap are obliquely distributed in a cone shape from the upper end away from the central line, and the inclination angle of the circumferential grinding gap is larger than that of the axial grinding gap.

Further, the bottom surface of the upper grinding blade and the upper surface of the lower grinding blade have the same inclination angle, and the upper conical teeth of each circle are correspondingly matched with the lower conical teeth; the upper conical teeth or the lower conical teeth are distributed on the same straight line along the radial direction, and powder discharge channels are formed between the adjacent upper conical teeth which are distributed in the radial direction and between the adjacent lower conical teeth which are distributed in the radial direction.

Further, the bottom surface of the upper grinding knife is provided with more than one circle of upper conical teeth around the inner grinding knife, an upper annular grinding channel is formed between two adjacent circles of upper conical teeth along the circumferential direction, the upper surface of the lower grinding knife is correspondingly provided with more than one circle of lower conical teeth around the inner grinding knife, and a lower annular grinding channel is formed between two adjacent circles of lower conical teeth along the circumferential direction; each circle of the upper conical teeth are embedded with the corresponding lower annular grinding channel, and each circle of the lower conical teeth are embedded with the corresponding upper annular grinding channel.

Further, upper powder discharge channels are formed between the adjacent upper conical teeth which are distributed in the radial direction, and the upper powder discharge channels are communicated with each upper annular grinding channel in the radial direction; and a lower powder discharge channel is formed between the adjacent lower conical teeth which are distributed in the radial direction, and the lower powder discharge channels are communicated with each lower annular grinding channel in the radial direction.

Optionally, the upper powder discharge channel takes the inner grinding blade as a center to be in involute spiral distribution, and the lower powder discharge channel takes the inner grinding blade as a center to be in involute spiral distribution.

Further, each upper conical tooth is in a tetrahedral pyramid shape and comprises an upper first side serrated surface, an upper second side serrated surface, an upper front trapezoidal tooth surface and an upper rear trapezoidal tooth surface, wherein the upper first side serrated surface and the upper second side serrated surface are oppositely arranged along the circumferential direction; the upper powder discharge channel is formed between the circumferentially adjacent upper first side serrated surface and the upper second side serrated surface, and the upper annular grinding channel is formed between the radially adjacent upper front trapezoidal tooth surface and the upper rear trapezoidal tooth surface;

each lower conical tooth is in a tetrahedral pyramid shape and comprises a lower first side saw tooth surface, a lower second side saw tooth surface, a lower front trapezoidal tooth surface and a lower rear trapezoidal tooth surface, wherein the lower first side saw tooth surface and the lower second side saw tooth surface are oppositely arranged along the circumferential direction; the lower powder discharge channel is formed between the circumferentially adjacent lower first side serrated surface and the lower second side serrated surface, and the lower annular grinding channel is formed between the radially adjacent lower front trapezoidal tooth surface and the lower rear trapezoidal tooth surface.

Further, the upper front trapezoidal tooth surface of each of the upper cone teeth is obliquely distributed toward the central axis, and correspondingly, the lower front trapezoidal tooth surface of each of the lower cone teeth is obliquely distributed toward the central axis.

Further, an upper transition ring surface is arranged at the lower end of the second upper grinding tooth groove, an upper transition groove is arranged in the upper transition ring surface corresponding to each upper powder discharge channel, and the upper transition grooves are correspondingly communicated with the upper powder discharge channels; the upper transition ring surface is provided with a lower transition ring inclined surface on the lower grinding blade, a lower transition groove is arranged in the lower transition ring inclined surface corresponding to each lower powder discharging channel, one end of the lower transition groove extends to the connection position of the inner grinding blade and the lower grinding blade, and the other end of the lower transition groove is correspondingly communicated with the lower powder discharging channels.

Further, the lower end edge of the bottom surface of the upper grinding blade is provided with an upper edge ring surface, the lower end edge of the upper surface of the lower grinding blade is correspondingly provided with a lower edge ring surface, the upper powder discharge channel penetrates through the upper edge ring surface, the lower powder discharge channel penetrates through the lower edge ring surface, and the upper edge ring surface and the lower edge ring surface are correspondingly matched.

Further, the first upper grinding tooth grooves are obliquely distributed in an inverted cone shape from the upper end to the central line, the first upper grinding tooth grooves are composed of a plurality of triangular grinding teeth, and each triangular grinding tooth comprises a first triangular tooth surface and a second triangular tooth surface which are obliquely distributed in an inverted cone shape from the upper end to the central line; the second upper grinding tooth grooves are obliquely distributed in a conical shape from the upper end away from the central line, each second upper grinding tooth groove consists of a plurality of trapezoid arc-shaped teeth, and each trapezoid arc-shaped tooth comprises a first convex arc-shaped tooth surface and a second convex arc-shaped tooth surface which are obliquely distributed in a conical shape from the upper end away from the central line and are obliquely distributed in the circumferential direction;

optionally, the upper and lower ends of the first convex arc tooth surface and the second convex arc tooth surface are respectively provided with a trapezoidal tooth surface.

Further, the first inner grinding tooth grooves are obliquely and conically distributed from the upper end away from the central line, the first inner grinding tooth grooves are formed by a plurality of spiral grinding teeth, and each spiral grinding tooth comprises a first spiral tooth surface and a second spiral tooth surface which are obliquely and conically distributed from the upper end away from the central line; the second internal grinding tooth grooves are distributed in a conical shape from the upper end away from the central line, the second internal grinding tooth grooves are formed by a plurality of triangular arc-shaped teeth, and each triangular arc-shaped tooth comprises a first concave arc-shaped tooth surface and a second concave arc-shaped tooth surface which are distributed in a conical shape from the upper end away from the central line in a inclined manner and are inclined in the circumferential direction.

Optionally, the lower ends of the triangular arc teeth are respectively provided with an inclined triangular surface, and the inclined triangular surfaces extend to the edge of the inner grinding cutter base.

Optionally, the spiral direction of the spiral grinding tooth is the same as the inclination direction of the first triangular tooth surface or the second triangular tooth surface in the first upper grinding tooth groove. The spiral direction of the spiral grinding teeth is the same as the inclined direction of the trapezoid arc-shaped teeth of the second upper grinding tooth groove and the inclined direction of the triangle arc-shaped teeth of the second inner grinding tooth groove.

By adopting the technical scheme, the vertical type in-line grinding knife set of the embodiment of the invention forms a guiding crushing gap with spiral feeding between the middle inner wall of the upper grinding knife and the upper part of the inner grinding knife, forms an axial grinding gap for axial cutting and grinding with the inner grinding knife at the lower part, forms a circumferential grinding gap for circumferential cutting and grinding with the lower grinding knife at the bottom surface of the upper grinding knife, and forms a plurality of through powder discharging channels between the bottom surface of the upper grinding knife and the lower grinding knife; the coffee beans are spirally rolled downwards and extruded and crushed at the same time when being led into the crushing gap, multi-angle multi-face cutting is carried out at the circumferential grinding gap and the circumferential grinding gap, the powder discharging gap is arranged between the conical teeth, the switched coffee particles immediately fall into the powder discharging gap to be rapidly discharged, the retention time of the coffee particles in the grinding knife set is short, the coffee particles are prevented from being extruded mutually and extruded with the inner wall of the knife set to produce coffee powder, and the coffee particles which have a polyhedral shape and uniform size are obtained.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a top view of a prior art abrasive cutterhead assembly;

FIG. 2 is a front view of a prior art abrasive cutterhead assembly;

FIG. 3 is a front view of the vertical inline grinding whetset of the present invention;

FIG. 4 is a top view of the vertical inline grinding whetstone of the present invention;

FIG. 5 is a bottom view of the vertical inline grinding whetstone assembly of the present invention;

FIG. 6 is a cross-sectional view of the structure of section A-A of FIG. 4;

FIG. 7 is a three-dimensional block diagram of a vertical inline grinding whetset of the present invention;

FIG. 8 is a three-dimensional exploded view of the vertical inline grinding whetset of the present invention;

FIG. 9 is a three-dimensional view of the upper abrasive blade of the present invention;

FIG. 10 is a bottom view of the upper grinding blade of the present invention;

FIG. 11 is a front view of the inner and lower grinder blades of the present invention;

FIG. 12 is a top view of the inner and lower grinding blades of the present invention;

FIG. 13 is a three-dimensional block diagram of the inner and lower grinding blades of the present invention;

FIG. 14 is a three-dimensional structural view of the inner grinding blade of the present invention;

FIG. 15 is a diagram showing the configuration of the cooperation relationship among the upper grinding blade, the inner grinding blade and the lower grinding blade according to the present invention;

FIG. 16 is a schematic view of the cross-sectional shape of the powder discharge passage of the present invention;

in the figure, 10-upper grinding knives, 11-fixed bosses, 12-first upper grinding tooth slots, 121-triangular grinding teeth, 122-first triangular tooth flanks, 123-second triangular tooth flanks, 13-second upper grinding tooth slots, 131-trapezoidal arc teeth, 132-first convex arc tooth flanks, 133-second convex arc tooth flanks, 134-trapezoidal tooth surfaces, 14-upper transitional torus, 15-upper transitional grooves, 16-upper conical teeth, 161-upper first side serrated surfaces, 162-upper second side serrated surfaces, 163-upper front trapezoidal tooth flanks, 164-upper rear trapezoidal tooth flanks, 17-upper powder discharge channels, 18-upper annular grinding channels, 19-upper edge torus;

20-internal grinding cutter, 21-internal shaft hole, 22-internal mounting pin hole, 23-first internal grinding tooth socket, 231-spiral grinding tooth, 232-first spiral tooth surface, 233-second spiral tooth surface, 24-second internal grinding tooth socket, 241-triangular arc tooth, 242-first concave arc tooth surface, 243-second concave arc tooth surface, 244-inclined triangular surface and 25-internal grinding cutter base;

30-lower grinding cutters, 31-lower shaft holes, 32-lower mounting pin holes, 33-bearing tables, 34-lower transition ring inclined planes, 35-lower transition grooves, 36-lower conical teeth, 361-lower first side saw tooth surfaces, 362-lower second side saw tooth surfaces, 363-lower front trapezoid tooth surfaces, 364-lower rear trapezoid tooth surfaces, 37-lower powder discharge channels, 38-lower annular grinding channels, 39-lower edge annular surfaces, 310-lower grinding bases and 311-fixed mounting holes.

Detailed Description

The following describes the embodiments of the present invention further with reference to the drawings. The description of these embodiments is provided to assist understanding of the present invention, but is not intended to limit the present invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Example 1

As shown in fig. 3-8, an embodiment of the present invention provides a vertical in-line grinding blade set, which includes an upper grinding blade 10, an inner grinding blade 20 and a lower grinding blade 30, wherein the upper grinding blade 10 is in a ring shape, and the inner grinding blade 20 is installed at the upper end of the lower grinding blade 30 and is located in the upper grinding blade 10;

the inner wall of the upper grinding cutter 10 is sequentially provided with a first upper grinding tooth groove 12 and a second upper grinding tooth groove 13, the outer wall of the inner grinding cutter 20 is sequentially provided with a first inner grinding tooth groove 23 and a second inner grinding tooth groove 24 corresponding to the first upper grinding tooth groove 12 and the second upper grinding tooth groove 13, and the bottom surface of the upper grinding cutter 10 and the upper surface of the lower grinding cutter 30 are respectively provided with more than one circle of upper conical teeth 16 and lower conical teeth 36;

an induced crushing gap is formed between the first upper grinding tooth groove 12 and the first inner grinding tooth groove 23, an axial grinding gap is formed between the second upper grinding tooth groove 13 and the second inner grinding tooth groove 24, the upper conical teeth 16 and the lower conical teeth 36 are in staggered fit along the radial direction to form a circumferential grinding gap, a powder discharge channel is formed between adjacent upper conical teeth 16 and between adjacent lower conical teeth 36 in the axial grinding gap, and materials enter from the induced crushing gap and are discharged from the powder discharge channel after being subjected to multi-face cutting of the axial grinding gap and the circumferential grinding gap.

Specifically, the leading-in crushing gap is inclined to form an inverted cone shape from the upper end to the central line, and the inclination angle between the leading-in crushing gap and the central line can be 10-20 degrees, preferably 15 degrees; the axial grinding gap and the circumferential grinding gap are distributed in a tapered manner from the upper end away from the central line, and the inclination angle of the circumferential grinding gap is larger than that of the axial grinding gap. The inclination of the axial grinding gap to the horizontal plane may be 50-70 degrees, preferably 60 degrees, and the inclination of the circumferential grinding gap to the horizontal plane may be 10-20 degrees, preferably 15 degrees. As shown in fig. 15, the leading-in crushing gap is of a structure with wide upper part and narrow lower part, coffee beans enter from the upper end of the leading-in crushing gap, are crushed by extrusion under the action of the first upper grinding tooth groove 12 and the first inner grinding tooth groove 23 and enter the axial grinding gap and the circumferential grinding gap in a spiral way from the lower end of the leading-in crushing gap, and due to the transitional arrangement of the inclination angle, coffee particles cannot be blocked among the leading-in crushing gap, the axial grinding gap and the circumferential grinding gap to cause that the coffee particles are excessively extruded into coffee powder, and the directions of cutting structures of cutters in the axial grinding gap and the circumferential grinding gap are different, so that multi-layer multi-surface cutting processing is carried out on the coffee beans, and the coffee particles are in a polyhedral structure.

As shown in fig. 6, the bottom surface of the upper grinding blade 10 and the upper surface of the lower grinding blade 30 have the same inclination angle, and the upper conical teeth 16 of each turn are correspondingly matched with the lower conical teeth 36; the upper conical teeth 16 or the lower conical teeth 36 are radially and linearly distributed, and a powder discharge channel is formed between the radially distributed adjacent upper conical teeth 16 and between the radially distributed adjacent lower conical teeth 36.

Specifically, as shown in fig. 9, the bottom surface of the upper grinding blade 10 is provided with more than one circle (3 circles as shown in fig. 10) of the upper conical teeth 16 around the inner grinding blade 20, an upper annular grinding channel 18 is formed between two adjacent circles of the upper conical teeth 16 along the circumferential direction, the upper surface of the lower grinding blade 30 is correspondingly provided with more than one circle (3 circles as shown in fig. 12) of the lower conical teeth 36 around the inner grinding blade 30, and a lower annular grinding channel 38 is formed between two adjacent circles of the lower conical teeth 36 along the circumferential direction; each ring of the upper tapered teeth 16 is engaged with the corresponding lower annular grinding channel 38, and each ring of the lower tapered teeth 36 is engaged with the corresponding upper annular grinding channel 18. The upper conical teeth 16 are arranged in a multi-circle annular array in the bottom surface of the upper grinding blade 10, and likewise, the lower conical teeth 36 are arranged in a multi-circle annular array in the bottom surface of the lower grinding blade 30, and the number of teeth of the annular arrays of the upper conical teeth 16 and the annular arrays of the lower conical teeth 36 is 40-60; when the upper and lower grinding blades 10 and 30 are engaged, the lower grinding blade 30 can be rotated with no gap between the bottom surfaces of the upper grinding blade 10.

As shown in fig. 8, upper powder discharge channels 17 are formed between adjacent upper conical teeth 16 which are distributed radially, and the upper powder discharge channels 17 are communicated with each upper annular grinding channel 18 along the radial direction; a lower powder discharge channel 37 is formed between the adjacent lower conical teeth 36 which are distributed in the radial direction, and the lower powder discharge channels 37 are communicated with each lower annular grinding channel 38 in the radial direction. The upper powder discharging channel 17 and the lower powder discharging channel 37 are groove-shaped, and as shown in fig. 16, the cross section of the powder discharging channel can be V-shaped, trapezoidal, arc-shaped, rectangular and other modes.

Optionally, the upper powder discharge channel 17 is in involute spiral distribution with the inner grinding blade 20 as a center, and the lower powder discharge channel 27 is in involute spiral distribution with the inner grinding blade 20 as a center.

In use, coffee particles are circumferentially cut in the upper annular grinding channel 18 and the lower annular grinding channel 38 and then fall into the upper powder discharge channel 17 and the lower powder discharge channel 37, as the upper powder discharge channel 17 and the lower powder discharge channel 37 are obliquely arranged, and the powder discharge channels 17 and the lower powder discharge channel 37 are in involute spiral distribution by taking the inner grinding cutter 20 as a center, under the action of rotary centrifugal force, the coffee particles can be rapidly discharged from the tail end without being detained between the cutters, each ring of upper conical teeth 16 is embedded with the corresponding lower annular grinding channel 38, each ring of lower conical teeth 36 is embedded with the corresponding upper annular grinding channel 18, namely, the upper conical teeth 16 are scraped in the lower annular grinding channel 38, the lower conical teeth 36 are scraped in the upper annular grinding channel 18, and when the upper conical teeth 16 and the lower conical teeth 36 relatively rotate, all the coffee particles can be scraped in the powder discharge channels and are rapidly discharged under the action of centrifugal force.

As shown in fig. 9, each of the upper cone teeth 16 has a tetrahedral pyramid shape, including an upper first side saw tooth surface 161, an upper second side saw tooth surface 162, and upper front and rear trapezoidal tooth surfaces 163, 164, which are disposed in front of and behind each other in the radial direction; the upper powder discharge channel 17 is formed between the upper first side serrated surface 161 and the upper second side serrated surface 162 which are adjacent in the circumferential direction, and the upper annular grinding channel 18 is formed between the upper front trapezoidal tooth surface 163 and the upper rear trapezoidal tooth surface 164 which are adjacent in the radial direction;

as shown in fig. 13, each of the lower tapered teeth 36 has a tetrahedral pyramid shape, including a lower first side saw tooth surface 361, a lower second side saw tooth surface 362, and lower front trapezoidal tooth surfaces 363, lower rear trapezoidal tooth surfaces 364, which are disposed opposite to each other in the circumferential direction, and disposed front and rear in the radial direction; the lower powder discharge channel 37 is formed between the circumferentially adjacent lower first side serrated surface 361 and lower second side serrated surface 362, and the lower annular grinding channel 38 is formed between the radially adjacent lower front trapezoidal tooth surface 363 and lower rear trapezoidal tooth surface 364.

Alternatively, the upper front trapezoidal tooth surface 163 of each of the upper conical teeth 16 is distributed obliquely to the central axis, and correspondingly, the lower front trapezoidal tooth surface 363 of each of the lower conical teeth 36 is distributed obliquely to the central axis. Alternatively, the upper front trapezoidal tooth surface 163 of each of the upper conical teeth 16 is distributed obliquely away from the central axis, and correspondingly, the lower front trapezoidal tooth surface 363 of each of the lower conical teeth 36 is distributed obliquely away from the central axis. The upper front trapezoidal tooth surface 163 and the lower front trapezoidal tooth surface 363 have the same inclination angle, preferably 60 degrees, and since the intersection of the upper front trapezoidal tooth surface 163 with the lower first side serrated surface 361 and the lower second side serrated surface 362 forms a circumferential cutting edge at the intersection of the lower front trapezoidal tooth surface 363 with the lower first side serrated surface 361 and the lower second side serrated surface 362, the inclination can increase the length of the circumferential cutting edge, and the cutting increase is sufficient.

As shown in fig. 9, an upper transition ring surface 14 is disposed at the lower end of the second upper grinding tooth slot 13, an upper transition groove 15 is disposed in the upper transition ring surface 14 corresponding to each upper powder discharge channel 17, and the upper transition groove 15 is correspondingly communicated with the upper powder discharge channels 17; as shown in fig. 12, a lower transition ring inclined surface 34 is provided on the lower grinding blade 30 corresponding to the upper transition ring surface 14, a lower transition groove 35 is provided in the lower transition ring inclined surface 34 corresponding to each lower powder discharge channel 37, one end of the lower transition groove 35 extends to a connection position between the inner grinding blade 20 and the lower grinding blade 30, and the other end is correspondingly communicated with the lower powder discharge channel 37.

Optionally, the upper powder discharging channel 17 and the upper transition groove 15 are integrally formed and are on the same straight line; the lower powder discharge channel 37 and the lower transition groove 35 are integrally formed on the same straight line. The coffee particles in the axial grinding gap can smoothly fall into the circumferential grinding gap through the upper transition ring surface 14 and the lower transition ring inclined surface 34, and the coffee particles with smaller centrifugal force can fall between the upper transition ring surface 14 and the lower transition ring inclined surface 34, can directly enter the upper powder discharge channel 17 or the lower powder discharge channel 37 through the upper transition groove 15 and the lower transition groove 35, are rapidly discharged through centrifugal force, and avoid being excessively ground into coffee powder.

Optionally, an upper edge ring surface 19 is provided at the lower end edge of the bottom surface of the upper grinding blade 10, a lower edge ring surface 310 is provided corresponding to the lower end edge of the upper surface of the lower grinding blade 30, the upper powder discharge channel 17 penetrates through the upper edge ring surface 19, the lower powder discharge channel 37 penetrates through the lower edge ring surface 310, and the upper edge ring surface 19 and the lower edge ring surface 310 are correspondingly matched. The upper edge ring surface 19 and the lower edge ring surface 310 serve as edges for buckling between the bottom surface of the upper grinding blade 10 and the lower grinding blade 30, and when the upper edge ring surface 19 and the lower edge ring surface 310 are attached, the ends of the upper powder discharge channel 17 and the lower powder discharge channel 37 are arranged at the edges to form a plurality of powder discharge holes formed in the cross section as shown in fig. 16.

As shown in fig. 8 and 9, the first external grinding tooth grooves 12 are inclined from the upper end to the central line in an inverted cone shape, the first external grinding tooth grooves 12 are composed of a plurality of triangular grinding teeth 121, and each triangular grinding tooth 121 comprises a first triangular tooth surface 122 and a second triangular tooth surface 123 which are inclined from the upper end to the central line in an inverted cone shape. Alternatively, the first triangular tooth surface 122 and the second triangular tooth surface 123 intersect to form a tooth edge, and the cross section of the triangular grinding tooth 121 may be a right triangle or the like. As shown in fig. 7, the second outer grinding tooth grooves 13 are distributed in a tapered shape from the upper end away from the center line, the second outer grinding tooth grooves 13 are composed of a plurality of trapezoidal arc-shaped teeth 131, each of the trapezoidal arc-shaped teeth 131 includes a first convex arc-shaped tooth surface 132, a second convex arc-shaped tooth surface 133, which are distributed in a tapered shape from the upper end away from the center line and are inclined in the circumferential direction, and the grinding channel is formed between the adjacent first convex arc-shaped tooth surface 132 and the second convex arc-shaped tooth surface 133.

Specifically, the upper and lower ends of the first convex arc-shaped tooth surface 132 and the second convex arc-shaped tooth surface 133 are respectively provided with a trapezoidal tooth surface 134, and the grinding and pulverizing channel is communicated with the powder discharge gap 14.

As shown in fig. 8, the first inner grinding tooth grooves 23 are arranged in a tapered shape from the upper end away from the center line, the first inner grinding tooth grooves 23 are composed of a plurality of spiral grinding teeth 231, each of the spiral grinding teeth 231 comprises a first spiral tooth surface 232 and a second spiral tooth surface 233 which are arranged in a tapered shape from the upper end away from the center line, and the adjacent first spiral tooth surface 232 and second spiral tooth surface 233 form the leading crushing channel therebetween.

Optionally, a helical tooth edge surface is formed between the first helical tooth surface 232 and the second helical tooth surface 233, and the inclined directions between the first inner grinding tooth groove 23 and the first outer grinding tooth groove 12 are different, so that the gap leading into the crushing channel is in a mode of being wide in upper part and narrow in lower part, thereby being more beneficial to crushing and extrusion of materials.

As shown in fig. 8, 11-13, the second inner grinding tooth grooves 24 are distributed in a tapered shape from the upper end away from the center line, the second inner grinding tooth grooves 24 are composed of a plurality of triangular arc-shaped teeth 241, and each of the triangular arc-shaped teeth 241 comprises a first concave arc-shaped tooth surface 242 and a second concave arc-shaped tooth surface 243 which are distributed in a tapered shape from the upper end away from the center line and are inclined in the circumferential direction. Specifically, the lower ends of the triangular arc teeth 241 are respectively provided with inclined triangular surfaces 244, and the inclined triangular surfaces 244 extend to the edge of the inner grinding blade base 25.

Optionally, the spiral direction of the spiral grinding teeth 231 is the same as the inclination direction of the first triangular tooth surface 122 or the second triangular tooth surface 123 in the first outer grinding tooth slot 12. The spiral direction of the spiral grinding teeth 231 is the same as the inclined direction of the trapezoid arc teeth 131 of the second outer grinding tooth slot 13 and the inclined direction of the triangle arc teeth 241 of the second inner grinding tooth slot 24.

Optionally, the number of the first outer grinding tooth grooves 12 is smaller than the number of the second outer grinding tooth grooves 13, the number of the first inner grinding tooth grooves 23 is smaller than the number of the second inner grinding tooth grooves 24, and the first inner grinding tooth grooves 23 may be formed of 5 or 6 spiral grinding teeth 231.

Optionally, the trapezoid arc teeth 131 of the second outer grinding tooth groove 13 are outwardly protruded along the center line, and the triangle arc teeth 241 of the second inner grinding tooth groove 24 are inwardly recessed along the center line, so that a gap between the second outer grinding tooth groove 13 and the upper end of the second inner grinding tooth groove 24 is formed to be smaller than a gap between the second outer grinding tooth groove 13 and the middle and lower end of the second inner grinding tooth groove 24. Alternatively, the trapezoidal arc teeth 131 of the second outer grinding tooth slot 13 and the triangular arc teeth 241 of the second inner grinding tooth slot 24 are concave inward or concave outward along the center line and have different radians, so that the gap between the upper ends of the second outer grinding tooth slot 13 and the second inner grinding tooth slot 24 is smaller than the gap between the middle and lower ends of the second outer grinding tooth slot 13 and the second inner grinding tooth slot 24. In use, when a hard foreign matter (gravel, metal chips, etc.) falls into the upper end of the grinding channel, the foreign matter may destroy the second upper grinding tooth slot 13 and the second inner grinding tooth slot 24 at the upper end due to the rotational movement of the inner grinding blade 20 relative to the upper grinding blade 10, so that the gap is increased, if the gap distance between the second upper grinding tooth slot 13 and the second inner grinding tooth slot 24 is the same, the influence caused by the destruction of the second upper grinding tooth slot 13 and the second inner grinding tooth slot 24 cannot be eliminated regardless of the relative positions of the inner grinding blade 20 and the upper grinding blade 10, and when the gap between the upper ends of the second upper grinding tooth slot 13 and the second inner grinding tooth slot 24 is smaller than the gap between the middle and the lower ends of the second upper grinding tooth slot 13 and the second inner grinding tooth slot 24, the axial grinding gap can be kept relatively stable by shortening the length, and the second upper grinding tooth slot 13 and the second inner grinding tooth slot 24 cannot be made to contact each other, so that the grinding blade set can work continuously.

As shown in fig. 3, the upper end of the upper grinding blade 10 is further provided with a fixing boss 11 for fixing, an inner shaft hole 21 is provided in the middle of the inner grinding blade 20, a first inner grinding tooth slot 23 and a second inner grinding tooth slot 24 are provided around the inner shaft hole 21, a lower shaft hole 31 is provided in the middle of the lower grinding blade 30, the lower shaft hole 31 penetrates through the bottom surface of the lower grinding base 311, and the apertures of the inner shaft hole 21 and the lower shaft hole 31 are the same and correspondingly communicated.

Optionally, a receiving table 33 is provided in the middle of the lower grinding blade 30, the inner grinding blade base 25 is correspondingly provided on the receiving table 33, as shown in fig. 14, the bottom surface of the inner grinding blade base 25 is provided with a plurality of inner mounting pinholes 22, and a plurality of lower mounting pinholes 32 are correspondingly provided on the receiving table 33; the inner grinding blade 20 and the lower grinding blade 30 may be connected by a plurality of pins, or the inner grinding blade 20 and the lower grinding blade 10 may be integrally formed. The upper grinding blade 10, the inner grinding blade 20, and the lower grinding blade 30 are all made of metal materials such as tool steel, stainless steel, etc.

Optionally, a fixed mounting hole 312 is further provided on the bottom surface of the lower grinding base 311, and when in use, the power shaft is connected to drive the lower grinding blade 30 and the inner grinding blade 20 to rotate relative to the upper grinding blade 10 through the inner shaft hole 21, the lower shaft hole 31 and the fixed mounting hole 312, the upper grinding blade 10 is fixedly mounted in the device through the fixing boss 11, and the relative position between the upper grinding blade 10 and the inner grinding blade 20 and the relative position between the upper grinding blade 10 and the lower grinding blade 30 can be adjusted by adjusting the relative position of the fixing boss 11 in the device or adjusting the relative position of the power shaft, so that the size of the induced crushing gap, the axial grinding gap and the circumferential grinding gap can be adjusted.

According to the vertical type direct-discharge grinding knife set, a spiral feeding guide-in crushing gap is formed between the middle inner wall of the upper grinding knife and the upper part of the inner grinding knife, an axial grinding gap for axial cutting and grinding is formed between the lower part of the upper grinding knife and the inner grinding knife, a circumferential grinding gap for circumferential cutting and grinding is formed between the bottom surface of the upper grinding knife and the lower grinding knife, and a plurality of direct-through powder discharge channels are formed between the bottom surface of the upper grinding knife and the lower grinding knife; the coffee beans are spirally rolled downwards and extruded and crushed at the same time when being led into the crushing gap, multi-angle multi-face cutting is carried out at the circumferential grinding gap and the circumferential grinding gap, the powder discharging gap is arranged between the conical teeth, the switched coffee particles immediately fall into the powder discharging gap to be rapidly discharged, the retention time of the coffee particles in the grinding knife set is short, the coffee particles are prevented from being extruded mutually and extruded with the inner wall of the knife set to produce coffee powder, and the coffee particles which have a polyhedral shape and uniform size are obtained.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, and yet fall within the scope of the invention.

In the description of the present patent, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "row", "column", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present patent and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as a limitation on the novel form of the present patent.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present patent, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In the patent of the invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," "fixedly connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present patent will be understood by those skilled in the art according to the specific circumstances.

In the present patent, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Claims (9)

1. The vertical type in-line grinding knife set is characterized by comprising an upper grinding knife, an inner grinding knife and a lower grinding knife, wherein the upper grinding knife is annular, and the inner grinding knife is arranged at the upper end of the lower grinding knife and is positioned in the upper grinding knife;

the inner wall of the upper grinding cutter is sequentially provided with a first upper grinding tooth groove and a second upper grinding tooth groove, the outer wall of the inner grinding cutter is sequentially provided with a first inner grinding tooth groove and a second inner grinding tooth groove corresponding to the first upper grinding tooth groove and the second upper grinding tooth groove, and the bottom surface of the upper grinding cutter and the upper surface of the lower grinding cutter are respectively provided with more than one circle of upper conical teeth and lower conical teeth;

an induced crushing gap is formed between the first upper grinding tooth groove and the first inner grinding tooth groove, an axial grinding gap is formed between the second upper grinding tooth groove and the second inner grinding tooth groove, the upper conical teeth and the lower conical teeth are in staggered fit along the radial direction to form a circumferential grinding gap, a powder discharge channel is formed between the adjacent upper conical teeth and between the adjacent lower conical teeth in the axial grinding gap, and materials enter from the induced crushing gap and are discharged from the powder discharge channel after being subjected to multi-face cutting of the axial grinding gap and the circumferential grinding gap;

the bottom surface of the upper grinding knife is provided with more than one circle of upper conical teeth around the inner grinding knife, an upper annular grinding channel is formed between two adjacent circles of upper conical teeth along the circumferential direction, the upper surface of the lower grinding knife is correspondingly provided with more than one circle of lower conical teeth around the inner grinding knife, and a lower annular grinding channel is formed between two adjacent circles of lower conical teeth along the circumferential direction; each circle of the upper conical teeth are embedded with the corresponding lower annular grinding channel, and each circle of the lower conical teeth are embedded with the corresponding upper annular grinding channel.

2. The vertical inline grinding whetset of claim 1 wherein the lead-in crushing gap is tapered from the upper end toward the centerline, the axial grinding gap and the circumferential grinding gap are tapered from the upper end away from the centerline, and the circumferential grinding gap is tapered at an angle greater than the angle of inclination of the axial grinding gap.

3. The set of vertical inline grinding knives of claim 1, wherein the bottom surface of the upper grinding knives and the upper surface of the lower grinding knives have the same angle of inclination, the upper tapered teeth of each turn being correspondingly engaged with the lower tapered teeth; the upper conical teeth or the lower conical teeth are distributed on the same straight line along the radial direction, and powder discharge channels are formed between the adjacent upper conical teeth which are distributed in the radial direction and between the adjacent lower conical teeth which are distributed in the radial direction.

4. The vertical inline grinding whetset of claim 1 wherein an upper powder discharge channel is formed between radially disposed adjacent said upper tapered teeth, said upper powder discharge channels being in radial communication with each of said upper annular grinding channels; and a lower powder discharge channel is formed between the adjacent lower conical teeth which are distributed in the radial direction, and the lower powder discharge channels are communicated with each lower annular grinding channel in the radial direction.

5. The set of vertical inline grinding stones according to claim 4, wherein each of the upper cone teeth has a tetrahedral pyramid shape including an upper first side saw tooth face, an upper second side saw tooth face, which are disposed opposite to each other in a circumferential direction, and an upper front trapezoidal tooth face, an upper rear trapezoidal tooth face, which are disposed front and rear in a radial direction; the upper powder discharge channel is formed between the circumferentially adjacent upper first side serrated surface and the upper second side serrated surface, and the upper annular grinding channel is formed between the radially adjacent upper front trapezoidal tooth surface and the upper rear trapezoidal tooth surface;

each lower conical tooth is in a tetrahedral pyramid shape and comprises a lower first side saw tooth surface, a lower second side saw tooth surface, a lower front trapezoidal tooth surface and a lower rear trapezoidal tooth surface, wherein the lower first side saw tooth surface and the lower second side saw tooth surface are oppositely arranged along the circumferential direction; the lower powder discharge channel is formed between the circumferentially adjacent lower first side serrated surface and the lower second side serrated surface, and the lower annular grinding channel is formed between the radially adjacent lower front trapezoidal tooth surface and the lower rear trapezoidal tooth surface.

6. The set of vertical inline grinding cutters according to claim 5, wherein said upper front trapezoidal tooth face of each said upper tapered tooth is obliquely distributed toward a central axis, and correspondingly said lower front trapezoidal tooth face of each said lower tapered tooth is obliquely distributed toward a central axis.

7. The vertical inline grinding whetset of claim 1 wherein an upper transition annulus is provided at a lower end of the second upper grinding tooth slot, an upper transition groove being provided in the upper transition annulus corresponding to each upper powder discharge channel, the upper transition grooves being in corresponding communication with the upper powder discharge channels; a lower transition ring inclined plane is arranged on the lower grinding blade corresponding to the upper transition ring surface, a lower transition groove is arranged in the lower transition ring inclined plane corresponding to each lower powder discharge channel, one end of the lower transition groove extends to the connection position of the inner grinding blade and the lower grinding blade, and the other end of the lower transition groove is correspondingly communicated with the lower powder discharge channels;

the lower end edge of the bottom surface of the upper grinding blade is provided with an upper edge ring surface, the lower end edge of the upper surface of the lower grinding blade is provided with a lower edge ring surface corresponding to the upper surface of the lower grinding blade, the upper edge ring surface is penetrated by the upper powder discharge channel, the lower edge ring surface is penetrated by the lower powder discharge channel, and the upper edge ring surface is correspondingly matched with the lower edge ring surface.

8. The vertical inline grinding whetset of claim 1 wherein the first upper grinding tooth slots are disposed in an inverted conical configuration from an upper end toward a center line, the first upper grinding tooth slots being comprised of a plurality of triangular grinding teeth, each of the triangular grinding teeth including a first triangular tooth face, a second triangular tooth face disposed in an inverted conical configuration from an upper end toward a center line; the second upper grinding tooth grooves are obliquely distributed in a conical shape from the upper end to be far away from the central line, the second upper grinding tooth grooves are formed by a plurality of trapezoid arc-shaped teeth, and each trapezoid arc-shaped tooth comprises a first convex arc-shaped tooth surface and a second convex arc-shaped tooth surface which are obliquely distributed in a conical shape from the upper end to be far away from the central line and are obliquely distributed in the circumferential direction.

9. The set of vertical inline grinding whets of claim 8 wherein the first inner grinding tooth slots are conically tapered from the upper end away from the center line, the first inner grinding tooth slots being comprised of a plurality of helical grinding teeth, each of the helical grinding teeth including a first helical tooth face, a second helical tooth face conically tapered from the upper end away from the center line; the second internal grinding tooth grooves are distributed in a conical shape from the upper end away from the central line, the second internal grinding tooth grooves are formed by a plurality of triangular arc-shaped teeth, and each triangular arc-shaped tooth comprises a first concave arc-shaped tooth surface and a second concave arc-shaped tooth surface which are distributed in a conical shape from the upper end away from the central line in a inclined manner and are inclined in the circumferential direction.