CN216090169U - Double-layer grinding hand coffee machine - Google Patents

Abstract

The utility model discloses a double-layer grinding hand-operated coffee machine, which comprises a main shell, a rotating shaft, a rotating cover, a primary mounting seat and a secondary mounting seat, wherein the rotating cover is arranged at the upper end of the main shell; grinding sword and the outer grinding sword of one-level in being provided with the one-level in the one-level mount pad, grinding sword and the outer grinding sword of second grade in being provided with the second grade in the second grade mount pad, the pivot upper end is connected with the swivel cap, grinding sword and the second grade in the drive one-level are connected to the pivot lower extreme, main casing body upper end still is provided with adjusts the rotating turret and adjusts the swivel, the pivot is installed on adjusting the rotating turret, adjust the swivel cover and establish the axial displacement at the main casing body at main casing body upper portion and drive adjustment rotating turret. Through setting up one-level grinding knife tackle, second grade grinding knife tackle, can grind the grinding clearance of knife tackle, second grade grinding knife tackle to one-level and carry out the synchronization regulation, through double-deck grinding structure, can fully grind coffee beans, promoted grinding efficiency simultaneously.

Description

Double-layer grinding hand coffee machine

Technical Field

The utility model relates to the technical field of grinding equipment, in particular to a double-layer grinding hand-operated coffee machine.

Background

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

In order to make coffee better, the freshly ground coffee is made by grinding coffee beans into coffee powder, which is generally implemented by using a manual or electric grinding device, and the coffee powder has a particle size, a particle uniformity and a particle shape which can affect the taste of coffee making. Chinese utility model patent with publication number CN208799096U discloses an external-adjusting bean grinder, including: a hollow housing; a bean grinding mechanism assembled in the hollow shell; and a power mechanism for providing hand power to the bean grinding mechanism; a joint seat connected with the hollow shell; and a receiving seat which is assembled with the connecting seat and is used for collecting the ground coffee powder; a grinding adjusting mechanism is disposed between the power mechanism and the hollow housing, the grinding adjusting mechanism includes: the coffee bean grinding machine comprises a linkage piece, a driven disc, a positioning seat, a scale turntable and an angle scale, wherein the linkage piece is assembled with one end of a transmission shaft of the bean grinding mechanism and is locked with the driven disc into a whole, the driven disc is driven by the rotation of the scale turntable to link the linkage piece, and the thickness of ground coffee beans can be selected according to the number marks on the scale turntable, so that the effect of simple and accurate operation is achieved.

However, the conventional hand coffee machine generally has only one pair of grinding knife sets, coffee beans are crushed and ground into coffee powder while passing through the grinding knife sets, and due to the short grinding path, the grinding efficiency is low, and the grinding is insufficient, so that further optimization and improvement of the conventional grinding knife are required.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-layer grinding hand-operated coffee machine and aims to solve the technical problem that the grinding path of the existing hand-operated coffee machine is short.

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

a double-layer grinding hand-operated coffee machine comprises a main shell, a rotating shaft, a rotating cover, a primary mounting seat and a secondary mounting seat, wherein the rotating cover is arranged at the upper end of the main shell; the utility model discloses a rotary grinding machine, including main casing body, one-level mount pad, pivot upper end, pivot lower extreme, regulation swivel cover, be provided with in the one-level grinding sword and the outer grinding sword of one-level, be provided with in the second grade mount pad in grinding sword and the outer grinding sword of second grade, pivot upper end with the swivel cover is connected, the drive is connected to the pivot lower extreme grind in the one-level with grind the sword in the second grade, main casing body upper end still is provided with adjusts the rotating turret and adjusts the swivel, the pivot is installed on adjusting the rotating turret, adjust the swivel cover and establish main casing body upper portion and drive adjust the rotating turret the axial displacement of main casing body.

Furthermore, the upper end of the rotating shaft is fixedly connected with a shaft connecting piece through a spline end, the shaft connecting piece is installed in the rotating cover through a plurality of bearings, a grinding knife driving part is arranged at the lower part of the rotating shaft, and the first-stage inner grinding knife and the second-stage inner grinding knife are sequentially installed on the grinding knife driving part.

Further, be provided with the guide clamping ring on the one-level mount pad, the one-level grinds the sword setting outward in the one-level mount pad, the upper end with the guide clamping ring is connected. Specifically, the primary mounting seat and the material guide pressure ring are installed into the main shell from the lower end, and the primary mounting seat is fixed with the main shell through threaded fit.

Furthermore, a material guide support ring is arranged below the second-stage mounting seat, and the second-stage external grinding cutter is arranged in the second-stage mounting seat through the material guide support ring.

Further, be provided with the pivot seat in the main casing body, the pivot seat is in through a plurality of evenly distributed's division board setting the central point of the main casing body puts, the pivot is installed through a bearing respectively both ends about the pivot seat.

Furthermore, a center bearing seat hole is formed in the upper end of the second-stage mounting seat, the center bearing seat hole is formed in the middle of the upper end of the second-stage mounting seat through a plurality of supporting rib plates, the rotating shaft penetrates through the center bearing seat hole through a bearing, a first-stage inner grinding cutter is sleeved on the upper end of the center bearing seat hole, and a second-stage inner grinding cutter is sleeved on the lower end of the center bearing seat hole.

Furthermore, the lower end of the rotating shaft is provided with a locking nut, a threaded end is arranged at the lower end of the rotating shaft corresponding to the locking nut, the locking nut is matched with the threaded end, and the bottom of the secondary internal grinding knife is attached to the upper end of the locking nut.

Furthermore, the adjusting rotating frame is provided with a central shaft hole, the central shaft hole is arranged in the center of the adjusting rotating frame through a plurality of supporting ribs, and the rotating shaft is arranged in the central shaft hole through a positioning supporting sleeve and a shaft shoulder.

Furthermore, a limit guide ring is arranged between the rotary cover and the upper end of the main shell, and the limit guide ring is used for limiting the axial movement of the adjusting rotary ring; adjust the change inner wall and evenly be provided with the scale groove, it establishes to adjust the change cover main casing body upper portion just is in spacing guide ring below, correspond on the main casing body the scale groove evenly is provided with a plurality of balls.

Furthermore, main casing body upper end is provided with a plurality of grooves of splining adjusting the rotating turret periphery wall corresponds the groove of splining is provided with raised thread portion, raised thread portion with the restriction of splining groove the adjusting the rotating turret for the main casing body rotates, raised thread portion with the adjusting thread portion of adjusting the rotating ring inner wall is mutually supported.

Optionally, the scale groove in the adjusting rotary ring is arranged below the adjusting thread part, and the corresponding ball is mounted in the mounting seat hole of the main shell through the ball seat. A limiting bulge is further arranged below the scale groove, a stop post is arranged on the main shell through a limiting seat hole corresponding to the limiting bulge, and the limiting bulge and the stop post enable the adjusting rotating frame to rotate only one circle; the periphery wall of adjusting the swivel evenly is provided with the scale interval, and corresponds the scale marking of scale interval, in addition, it evenly is provided with a plurality of anti-skidding grooves of adjusting to adjust the swivel periphery wall. Meanwhile, the upper end of the main shell is provided with scale mark points corresponding to the scale marks.

When the adjustable rotary ring is used, the scale grooves roll relatively to the balls when the adjustable rotary ring rotates, a prompt sound is sent out along with the contact of the balls and the scale grooves at different positions, a user can judge the rotating scale value through the times of sound lifting or determine the rotating scale value through the scale mark points and the scale mark lines, the adjusting thread part of the adjustable rotary ring is matched with the convex thread part of the adjustable rotary frame, the adjustable rotary ring cannot axially move due to the limiting guide ring, only the convex thread part can axially move, the adjustable rotary frame cannot rotate due to the rotation stopping grooves, so that the rotation of the adjustable rotary ring is converted into the axial movement of the adjustable rotary frame, the rotating shaft is supported and installed on the adjustable rotary frame, the first-stage internal grinding cutter and the second-stage internal grinding cutter are fixedly installed on the rotating shaft, and the rotating shaft synchronously moves with the first-stage internal grinding cutter and the second-stage internal grinding cutter, grinding gaps between the first-stage inner grinding cutter and the first-stage outer grinding cutter and between the second-stage inner grinding cutter and the second-stage outer grinding cutter are changed, and two-stage synchronous regulation of the granularity of the coffee powder is finally realized.

Further, the shaft connecting piece lower extreme is provided with bearing retainer ring, and the upper end is provided with connecting thread portion the axle head retainer ring with set up a plurality of bearings between the connecting thread portion, through a plurality of the bearing is installed in the swivel cap, set up a spline shaft hole in the shaft connecting piece, both ends are the clearance shaft hole about the spline shaft hole, the length in spline shaft hole is less than spline end length of pivot upper end.

Furthermore, the lower end edge of the rotating cover is attached to the upper circumferential surface of the limiting guide ring, a rotating handle seat is further arranged at the upper end of the rotating cover, and the rotating handle seat is matched with the connecting thread part.

Furthermore, the double-layer grinding hand-operated coffee machine also comprises a rotating handle, wherein one end of the rotating handle is provided with a handle, and the other end of the rotating handle is connected with the rotating handle seat through a connecting limiting piece; the rotating handle drives the rotating handle seat to drive the shaft connecting piece to rotate, and the shaft connecting piece drives the rotating shaft to rotate through the spline end.

Furthermore, the one-level external grinding cutter is annular, a one-level first external grinding tooth socket and a one-level second external grinding tooth socket are sequentially arranged on the inner wall of the one-level external grinding cutter, the one-level internal grinding cutter is arranged in the one-level external grinding cutter and corresponds to the one-level first external grinding tooth socket and the one-level second external grinding tooth socket, a one-level first internal grinding tooth socket and a one-level second internal grinding tooth socket are sequentially arranged in the one-level first external grinding cutter, a one-level leading-in crushing gap is formed between the one-level first external grinding tooth socket and the one-level first internal grinding tooth socket, and a one-level grinding crushing gap is formed between the one-level second external grinding tooth socket and the one-level second internal grinding tooth socket.

Further, the second-stage external grinding cutter is annular, a second-stage first external grinding tooth groove and a second-stage second external grinding tooth groove are sequentially formed in the inner wall of the second-stage external grinding cutter, the second-stage internal grinding cutter is arranged in the second-stage external grinding cutter, a second-stage first internal grinding tooth groove and a second-stage second internal grinding tooth groove are sequentially arranged corresponding to the second-stage first external grinding tooth groove and the second-stage second external grinding tooth groove, a second-stage leading-in crushing gap is formed between the second-stage first external grinding tooth groove and the second-stage first internal grinding tooth groove, and a second-stage grinding crushing gap is formed between the second-stage second external grinding tooth groove and the second-stage second internal grinding tooth groove.

By adopting the technical scheme, the double-layer grinding hand coffee machine provided by the embodiment of the utility model is provided with the primary grinding cutter set and the secondary grinding cutter set, and the primary inner grinding cutter set and the secondary inner grinding cutter set are driven by the same rotating shaft.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the main view of the double-grinding hand coffee maker of the present invention;

FIG. 2 is a top view of the dual-layer grinding hand coffee maker of the present invention;

FIG. 3 is a sectional view of the section A-A in FIG. 2;

FIG. 4 is a three-dimensional block diagram of a double-grinder hand coffee maker of the present invention;

FIG. 5 is a three-dimensional exploded view of the double-grinder coffee maker of the present invention;

FIG. 6 is a three-dimensional omitted structure diagram of the double-layer grinding hand coffee maker of the present invention;

FIG. 7 is a three-dimensional exploded and omitted structure of the double-layer grinding hand coffee maker of the present invention;

FIG. 8 is a three-dimensional block diagram of a secondary mount of the present invention;

FIG. 9 is a three-dimensional block diagram of an adjustment swivel of the present invention;

FIG. 10 is a structural diagram of the fit between the primary outer grinding blade and the primary inner grinding blade according to the present invention;

FIG. 11 is a structural diagram of a matching relationship between the two-stage outer grinding blade and the two-stage inner grinding blade according to the present invention;

FIG. 12 is a cross-sectional structural view of the shaft coupling of the present invention;

in the figure, 1-main shell, 101-rotating shaft seat, 102-separation plate, 103-mounting seat hole, 104-limiting seat hole, 105-rotation stopping groove, 106-scale mark point, 107-tooth groove ring; 2-rotating shaft, 201-grinding cutter driving part, 202-shaft shoulder, 203-spline end, 204-thread end;

3-bearing, 4-thread bushing, 5-shaft bushing, 6-shaft connecting piece, 61-bearing baffle ring, 62-clearance shaft hole, 63-spline shaft hole and 64-connecting thread part; 7-a material guide compression ring, 8-a primary inner grinding cutter, 9-a primary outer grinding cutter, 10-a primary mounting seat, 11-a secondary inner grinding cutter, 12-a secondary outer grinding cutter, 13-a material guide support ring, 14-a locking nut, 15-a secondary mounting seat, 151-a central bearing seat hole and 152-a support rib plate; 16-ball seat, 17-ball, 18-bumping post, 19-non-slip mat, 20-bin, 210-anti-slip groove outside bin, 21-positioning support sleeve, 22-adjusting rotating frame, 221-central shaft hole, 222-support rib and 223-raised thread part; 23-adjusting a rotating ring, 231-a scale groove, 232-an adjusting threaded part, 233-a limiting protrusion, 234-a scale value, 235-a scale marking line and 236-an adjusting anti-skidding groove; 24-a limiting guide ring, 25-a rotating cover, 26-a rotating handle seat, 27-a connecting limiting part, 28-a rotating handle, 29-a handle, 30-a fixed clamping ring and 31-a pressing screw thread part;

81-primary shaft hole, 82-primary first inner grinding tooth groove, 83-primary second inner grinding tooth groove, 84-primary inclined triangular ring surface, 91-primary first outer grinding tooth groove, 92-primary second outer grinding tooth groove, 111-secondary shaft hole, 112-secondary first inner grinding tooth groove, 113-secondary second inner grinding tooth groove, 114-secondary inclined triangular surface, 121-secondary first outer grinding tooth groove and 122-secondary second outer grinding tooth groove.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1-5, an embodiment of the present invention provides a double-layer grinding hand coffee maker, which includes a main housing 1, a rotating shaft 2, a rotating cover 25 disposed at an upper end of the main housing 1, and a primary mounting seat 10 and a secondary mounting seat 15 disposed in the main housing 1, wherein a storage bin 20 is connected to a lower end of the secondary mounting seat 15; grind sword 8 and the outer sword 9 that grinds of one-level in being provided with the one-level in the one-level mount pad 10, grind sword 11 and the outer sword 12 that grinds of second grade in being provided with the second grade in the second grade mount pad 15, 2 upper ends of pivot with rotatory lid 25 is connected, 2 lower extreme connection drives in the pivot grind sword 8 in the one-level with grind sword 11 in the second grade, main casing body 1 upper end still is provided with adjusts the rotating turret 22 and adjusts swivel 23, pivot 2 is installed adjust on the rotating turret 22, it establishes to adjust swivel 23 the cover main casing body 1 upper portion and drive adjust the rotating turret 22 and be in main casing body 1's axial displacement.

During the use, one-level grinding knife tackle, second grade grinding knife tackle is installed from top to bottom in the main casing body in proper order, synchronous rotation under same pivot drive, coffee beans is respectively through one-level grinding knife tackle, second grade grinding knife tackle, fall into the feed bin after second grade intensive grinding, through the two-stage clearance of grinding, coffee beans will be fully ground into coffee powder, in addition, because grinding sword and second grade internal grinding sword are all installed in same pivot in the one-level, drive the pivot at axial displacement through adjusting the rotating turret, thereby make grinding sword and second grade internal grinding sword at axial displacement in the one-level, because the external grinding sword of one-level and second grade external grinding sword are fixed at the main casing body, consequently, the one-level grinding clearance of one-level grinding knife tackle, the second grade grinding clearance synchronous control of second grade grinding knife tackle, thereby make the even and accord with the user's requirement of the granularity of coffee powder.

As shown in fig. 3 and 5, the upper end of the rotating shaft 2 is fixedly connected to a shaft connecting member 6 through a spline end 203, the shaft connecting member 6 is installed in the rotating cover 25 through a plurality of bearings 3, a grinding blade driving portion 201 is provided at the lower portion of the rotating shaft 2, and the primary inner grinding blade 8 and the secondary inner grinding blade 11 are sequentially installed in the grinding blade driving portion 201.

As shown in fig. 3, a material guiding press ring 7 is arranged on the primary mounting seat 10, the primary external grinding tool 9 is arranged in the primary mounting seat 10, and the upper end of the primary external grinding tool is connected with the material guiding press ring 7. Specifically, the primary mounting seat 10 and the material guiding pressure ring 7 are installed into the main casing 1 from the lower end, and the primary mounting seat 10 and the main casing 1 are fixed in a threaded fit manner.

As shown in fig. 3, a material guiding support ring 13 is disposed below the secondary mounting seat 15, and the secondary external grinding tool 12 is disposed in the secondary mounting seat 15 through the material guiding support ring 13. Specifically, threaded connection between the upper end of the second-stage mounting seat 15 and the inner wall of the main shell 1, the second-stage external grinding cutter 12 is installed from the upper end of the second-stage mounting seat 15, the guide support ring 13 is fixed with the inner wall of the second-stage mounting seat 15 in a threaded fit mode, and the lower end of the outer wall of the second-stage mounting seat 15 is in threaded connection with the storage bin 20. As shown in fig. 3, 6, and 7, a rotating shaft seat 101 is disposed in the main housing 1, the rotating shaft seat 101 is disposed at a central position of the main housing 1 through a plurality of partition plates 102 uniformly distributed, and the rotating shaft 2 is respectively mounted at upper and lower ends of the rotating shaft seat 101 through a bearing 3. Optionally, the upper end of the rotating shaft seat 101 is further provided with a threaded sleeve 4, the threaded sleeve 4 is used for fixing the upper end of the bearing 3, the lower end of the rotating shaft seat 101 is further provided with a shaft sleeve 5, and the shaft sleeve 5 is used for fixing the lower end of the bearing 3.

As shown in fig. 3 and 8, a center bearing seat hole 151 is formed in the upper end of the secondary mounting seat 15, the center bearing seat hole 151 is formed in the middle of the upper end of the secondary mounting seat 15 through a plurality of support rib plates 152, the rotating shaft 2 is inserted into the center bearing seat hole 151 through a bearing 3, a primary inner grinding cutter 8 is sleeved on the upper end of the center bearing seat hole 151 of the rotating shaft 2, and a secondary inner grinding cutter 11 is sleeved on the lower end of the center bearing seat hole 151.

Specifically, the upper and lower ends of the center bearing hole 151 are respectively provided with a bushing 5.

As shown in fig. 3, a locking nut 14 is arranged at the lower end of the rotating shaft 2, a threaded end 204 is arranged at the lower end of the rotating shaft 2 corresponding to the locking nut 14, the locking nut 14 is matched with the threaded end 204, and the bottom of the secondary inner grinding cutter 11 is attached to the upper end of the locking nut 14.

As shown in fig. 6 and 7, the adjusting rotary frame 22 is provided with a central shaft hole 221, the central shaft hole 221 is arranged in the center of the adjusting rotary frame 22 through a plurality of support ribs 222, and the rotating shaft 2 is installed in the central shaft hole 221 through a positioning support sleeve 21 and a shaft shoulder 202. As shown in fig. 3 and 9, a limit guide ring 24 is further disposed between the rotary cover 25 and the upper end of the main housing 1, and the limit guide ring 24 is used for limiting the axial movement of the adjusting rotary ring 23; adjust swivel 23 inner wall and evenly be provided with scale groove 231, it establishes to adjust swivel 23 the main casing body 1 upper portion just is in spacing guide ring 24 below, correspond on the main casing body 1 scale groove 231 evenly is provided with a plurality of balls 17.

As shown in fig. 6 and 7, a plurality of rotation stopping grooves 105 are formed in the upper end of the main housing 1, a raised thread portion 223 is formed on the outer peripheral wall of the adjusting rotary frame 22 corresponding to the rotation stopping grooves 105, the raised thread portion 223 and the rotation stopping grooves 105 cooperate to limit the rotation of the adjusting rotary frame 22 relative to the main housing 1, and the raised thread portion 223 cooperates with an adjusting thread portion 232 on the inner wall of the adjusting rotary ring 23.

Alternatively, the scale groove 231 in the adjusting swivel 23 is disposed below the adjusting screw portion 232, and the corresponding ball 17 is mounted in the mounting hole 103 of the main housing 1 through the ball seat 16. A limit protrusion 233 is further arranged below the scale groove 231, a stop post 18 is mounted on the main housing 1 through a limit seat hole 104 corresponding to the limit protrusion 233, and the limit protrusion 233 and the stop post 18 enable the adjusting rotary frame 22 to rotate only one circle; the outer peripheral wall of the adjusting rotary ring 23 is uniformly provided with a scale value 234 and a scale mark 235 corresponding to the scale value 234, and in addition, the outer peripheral wall of the adjusting rotary ring 12 is uniformly provided with a plurality of adjusting anti-skid grooves 236. Meanwhile, the scale mark points 106 corresponding to the scale marks 235 are arranged at the upper end of the main casing 1.

When the adjustable rotary ring is used, the scale grooves roll relatively to the balls when the adjustable rotary ring rotates, a prompt sound is sent out along with the contact of the balls and the scale grooves at different positions, a user can judge the rotating scale value through the times of sound lifting or determine the rotating scale value through the scale mark points and the scale mark lines, the adjusting thread part of the adjustable rotary ring is matched with the convex thread part of the adjustable rotary frame, the adjustable rotary ring cannot axially move due to the limiting guide ring, only the convex thread part can axially move, the adjustable rotary frame cannot rotate due to the rotation stopping grooves, so that the rotation of the adjustable rotary ring is converted into the axial movement of the adjustable rotary frame, the rotating shaft is supported and installed on the adjustable rotary frame, the first-stage internal grinding cutter and the second-stage internal grinding cutter are fixedly installed on the rotating shaft, and the rotating shaft synchronously moves with the first-stage internal grinding cutter and the second-stage internal grinding cutter, grinding gaps between the first-stage inner grinding cutter and the first-stage outer grinding cutter and between the second-stage inner grinding cutter and the second-stage outer grinding cutter are changed, and two-stage synchronous regulation of the granularity of the coffee powder is finally realized.

Specifically, as shown in fig. 5, 6 and 7, when the number of the balls 17 is 3, the number of the scale grooves 231 is 25, and the pitch of the relative rotation circle between the convex screw thread portion 223 and the adjusting screw thread portion 232 is 1mm, the axial adjusting distance of the primary inner grinding cutter 8 and the secondary inner grinding cutter shaft 11 is 1/75mm each time the primary inner grinding cutter is indicated by sound; or the distance of the rotary adjustment is determined according to the scale value, the scale mark line and the scale mark point.

As shown in fig. 12, the lower end of the shaft connecting piece 6 is provided with a bearing retainer ring 61, the upper end of the shaft connecting piece is provided with a connecting thread part 64, the shaft end retainer ring 61 and the connecting thread part 64 are provided with a plurality of bearings 3, the bearings 3 are installed in the rotating cover 25, the shaft connecting piece 6 is internally provided with a spline shaft hole 63, the upper end and the lower end of the spline shaft hole 63 are provided with a gap shaft hole 62, and the length of the spline shaft hole 63 is smaller than that of a spline end 203 at the upper end of the rotating shaft 2. When the coffee powder adjusting device is used, the rotating shaft 2 is driven to move up and down by the adjusting rotating frame 22, and the spline end 203 can axially move in the spline shaft hole 63 in a reciprocating manner, so that the rotating shaft 2 cannot drive the shaft connecting piece 6 to move up and down when moving up and down in the axial position, and a gap generated between the rotating cover 25 and the upper end of the main shell 1 due to the adjustment of the particle size of coffee powder is avoided.

As shown in fig. 3, the upper end of the secondary mounting seat 15 extends into the main housing 1 and is in threaded connection with the inner wall of the main housing 1, the lower end of the main housing 1 is matched with the step surface of the outer peripheral wall of the secondary mounting seat 15, and the lower end of the secondary mounting seat 15 is in threaded connection with the storage bin 20.

Optionally, the surface of the main housing 1 is further provided with circumferentially uniform and separate spline rings 107, which is convenient for a user to hold and is decorative and beautiful.

Specifically, the lower end edge of the rotating cover 25 is attached to the upper circumferential surface of the limiting guide ring 24, the upper end of the rotating cover 25 is further provided with a rotating handle seat 26, and the rotating handle seat 26 is matched with the connecting thread part 64.

As shown in fig. 1, the bottom of the bin 20 is provided with a non-slip mat 19, and a plurality of non-slip grooves 210 are uniformly arranged on the outer peripheral wall of the bin 20.

As shown in fig. 3 and 5, the double-layer grinding hand coffee maker further comprises a rotating handle 28, wherein one end of the rotating handle 28 is provided with a handle 29, and the other end of the rotating handle 28 is connected with the rotating handle base 26 through a connecting limiting piece 27; the rotating handle 28 drives the rotating handle seat 26 to drive the shaft connecting piece 6 to rotate, and the shaft connecting piece 6 drives the rotating shaft 2 to rotate through the spline end 203.

Specifically, a fixing clamping ring 30 and a pressing threaded part 31 are arranged in the handle 29, the fixing clamping ring 30 is matched with the tail end of the rotating handle 28, and the pressing threaded part 31 fixes the fixing clamping ring 30 in a mounting hole of the handle 29.

As shown in fig. 10, the primary external grinding blade 9 is annular, a primary first external grinding tooth groove 91 and a primary second external grinding tooth groove 92 are sequentially formed in the inner wall of the primary external grinding blade 9, the primary internal grinding blade 8 is disposed in the primary external grinding blade 9, a primary first internal grinding tooth groove 82 and a primary second internal grinding tooth groove 83 are sequentially disposed corresponding to the primary first external grinding tooth groove 91 and the primary second external grinding tooth groove 92, a primary leading-in crushing gap is formed between the primary first external grinding tooth groove 91 and the primary first internal grinding tooth groove 82, and a primary grinding and crushing gap is formed between the primary second external grinding tooth groove 92 and the primary second internal grinding tooth groove 83. As shown in fig. 11, the secondary external grinding blade 12 is annular, a secondary first external grinding tooth groove 121 and a secondary second external grinding tooth groove 122 are sequentially formed in the inner wall of the secondary external grinding blade 12, the secondary internal grinding blade 11 is disposed in the secondary external grinding blade 12, a secondary first internal grinding tooth groove 112 and a secondary second internal grinding tooth groove 113 are sequentially disposed corresponding to the secondary first external grinding tooth groove 121 and the secondary second external grinding tooth groove 122, a secondary introducing crushing gap is formed between the secondary first external grinding tooth groove 121 and the secondary first internal grinding tooth groove 112, and a secondary grinding and crushing gap is formed between the secondary second external grinding tooth groove 122 and the secondary second internal grinding tooth groove 113.

Specifically, the primary first external grinding tooth groove 91 or the secondary first external grinding tooth groove 121 is inclined from the upper end to the center line and is distributed in an inverted cone shape, the primary first external grinding tooth groove 91 or the secondary first external grinding tooth groove 121 is composed of a plurality of upper triangular arc-shaped teeth, and each upper triangular arc-shaped tooth comprises a rectangular tooth surface and an arc-shaped tooth surface which are inclined from the upper end to the center line and are distributed in an inverted cone shape; the first-stage second external grinding tooth groove 92 or the second-stage second external grinding tooth groove 122 is inclined from the upper end to the center line and is in conical distribution, the first-stage second external grinding tooth groove 92 or the second-stage second external grinding tooth groove 122 is composed of a plurality of lower-layer triangular arc-shaped teeth, and each lower-layer triangular arc-shaped tooth comprises a first convex arc-shaped tooth surface and a second convex arc-shaped tooth surface which are inclined from the upper end to the center line and are in conical distribution and in the circumferential direction.

Optionally, the rectangular tooth surface and the arc tooth surface are intersected to form a tooth edge, and the section of the upper triangular arc tooth can be in a right triangle shape.

Specifically, the primary first internal grinding tooth groove 82 or the secondary first internal grinding tooth groove 112 is inclined from the upper end to be away from the center line and is distributed in a conical shape, the primary first internal grinding tooth groove 82 or the secondary first internal grinding tooth groove 112 is composed of 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 inclined from the upper end to be away from the center line and are distributed in a conical shape; grind the tooth's socket 83 in the one-level second or grind the tooth's socket 113 in the second grade in beginning to keep away from the central line slope from the upper end and be the toper and distribute, grind the tooth's socket 83 in the one-level second or grind the tooth's socket 113 in the second grade second and constitute by a plurality of interior triangle arc tooth, each interior triangle arc tooth includes and begins to keep away from the central line slope from the upper end and be the first concave arc flank, the second concave arc flank that the conical distribution just circumferencial direction inclines.

Optionally, a helical tooth flank is formed between the first helical tooth flank and the second helical tooth flank, and an upper rectangular chamfer surface is spirally and synchronously arranged on the helical grinding tooth of the first-stage first internal grinding tooth groove 82. Because the first internal grinding tooth socket 82 of one-level and the first external grinding tooth socket 91 of one-level, the inclination direction between the first internal grinding tooth socket 112 of second grade and the first external grinding tooth socket 121 of second grade is different for the leading-in broken clearance of one-level, the leading-in broken clearance of second grade present wide mode from top to bottom, thereby be favorable to the extrusion crushing of material more.

Specifically, the lower ends of the inner triangular arc teeth of the primary second inner grinding tooth grooves 83 are respectively provided with a primary inclined triangular ring surface 84; the lower ends of the inner triangular arc-shaped teeth of the second-stage second inner grinding tooth grooves 113 are respectively provided with a second-stage inclined triangular surface 114; the primary grinding and crushing gap extends to a primary inner grinding knife base, and a primary powder discharge gap is formed between the primary inclined triangular ring surface 84 and the lower end of the primary second outer grinding tooth groove 92; the secondary grinding comminution gap extends to a secondary inner grinding blade base, a secondary powder discharge gap being formed between the secondary inclined triangular surface 114 and the lower end of the secondary second outer grinding gullet 122. Optionally, the spiral direction of the spiral grinding tooth is the same as the inclined direction of the rectangular tooth surface or the arc tooth surface in the first-stage first external grinding tooth groove 91 or the second-stage first external grinding tooth groove 121; the spiral direction of the spiral grinding teeth is the same as the inclination direction of the lower triangular arc-shaped teeth of the first-stage second external grinding tooth groove 92 or the second-stage second external grinding tooth groove 122, and the inclination direction of the inner triangular arc-shaped teeth of the first-stage second internal grinding tooth groove 92 or the second-stage second internal grinding tooth groove 122. Optionally, the number of the first outer grinding tooth grooves 91 is less than the number of the second outer grinding tooth grooves 92, the number of the first inner grinding tooth grooves 82 is less than the number of the second inner grinding tooth grooves 83, and the first inner grinding tooth grooves 82 may be composed of 5 or 6 spiral grinding teeth. The number of secondary first outer grinding gullets 121 is less than the number of secondary second outer grinding gullets 122, the number of secondary first inner grinding gullets 112 is less than the number of secondary second inner grinding gullets 113, and the secondary first inner grinding gullet 112 may be comprised of 5 or 6 helical grinding teeth.

Alternatively, the lower triangular arc-shaped teeth of the first-stage second outer grinding tooth grooves 92 are outwardly convex along the center line, and the inner triangular arc-shaped teeth of the first-stage second inner grinding tooth grooves 83 are inwardly concave along the center line, so that the gap between the upper ends of the first-stage second outer grinding tooth grooves 92 and the first-stage second inner grinding tooth grooves 83 is smaller than the gap between the middle and lower ends of the first-stage second outer grinding tooth grooves 92 and the first-stage second inner grinding tooth grooves 83. Or the lower triangular arc-shaped teeth of the first-stage second outer grinding tooth grooves 92 and the inner triangular arc-shaped teeth of the first-stage second inner grinding tooth grooves 83 are both concave inwards or concave outwards along the central line and have different radians, so that the gap between the upper ends of the first-stage second outer grinding tooth grooves 92 and the first-stage second inner grinding tooth grooves 83 is smaller than the gap between the middle ends and the lower ends of the first-stage second outer grinding tooth grooves 92 and the first-stage second inner grinding tooth grooves 83. By setting the gap at the upper end of the primary second outer grinding gullet 92 and the primary second inner grinding gullet 83 to be smaller than the gap between the middle and lower ends of the primary second outer grinding gullet 92 and the primary second inner grinding gullet 83. After the foreign matter destroys the one-level second external grinding tooth socket 92 and the one-level second internal grinding tooth socket 83 at the upper end, the distance between the one-level internal grinding cutter 8 and the one-level external grinding cutter 9 is shortened through fine adjustment, so that the grinding and crushing channel can keep the relative stability of the gap by shortening the length, and the contact interference between the one-level second external grinding tooth socket 92 and the one-level second internal grinding tooth socket 83 is avoided, thereby the one-level grinding cutter group can continuously work. Similarly, the secondary grinding cutter set can be arranged in the same way, and is not described in detail.

Optionally, a first-stage shaft hole 81 is formed in the center of the first-stage inner grinding cutter 8, a second-stage shaft hole 111 is formed in the center of the second-stage inner grinding cutter 11, the first-stage shaft hole 81 and the second-stage shaft hole 111 are correspondingly communicated, and the rotating shaft 2 is sequentially installed in the first-stage shaft hole 81 and the second-stage shaft hole 111 through the grinding cutter driving portion 201. According to the double-layer grinding hand-operated coffee machine provided by the embodiment of the utility model, the primary grinding cutter set and the secondary grinding cutter set are arranged, the primary inner grinding cutter and the secondary inner grinding cutter are driven by the same rotating shaft, in addition, the grinding gaps of the primary grinding cutter set and the secondary grinding cutter set can be synchronously adjusted, coffee beans can be fully ground through the double-layer grinding structure, and meanwhile, the grinding efficiency is improved.

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

In the description of the present patent application, it is to 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 and positional relationships based on those shown in the drawings, and are used merely for convenience of describing and simplifying the present patent application, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the novel aspects of the present patent application.

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

In the present patent application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," "secured," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present patent can be understood by those skilled in the art according to specific situations.

In the patent of the utility model, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Claims (10)

1. A double-layer grinding hand coffee maker is characterized by comprising a main shell, a rotating shaft, a rotating cover arranged at the upper end of the main shell, a primary mounting seat and a secondary mounting seat which are arranged in the main shell, wherein the lower end of the secondary mounting seat is connected with a storage bin; the utility model discloses a rotary grinding machine, including main casing body, one-level mount pad, pivot upper end, pivot lower extreme, regulation swivel cover, be provided with in the one-level grinding sword and the outer grinding sword of one-level, be provided with in the second grade mount pad in grinding sword and the outer grinding sword of second grade, pivot upper end with the swivel cover is connected, the drive is connected to the pivot lower extreme grind in the one-level with grind the sword in the second grade, main casing body upper end still is provided with adjusts the rotating turret and adjusts the swivel, the pivot is installed on adjusting the rotating turret, adjust the swivel cover and establish main casing body upper portion and drive adjust the rotating turret the axial displacement of main casing body.

2. The double-layer grinding hand-operated coffee machine according to claim 1, wherein the upper end of the rotating shaft is fixedly connected with a shaft connecting piece through a spline end, the shaft connecting piece is installed in the rotating cover through a plurality of bearings, the lower part of the rotating shaft is provided with a grinding knife driving part, and the primary inner grinding knife and the secondary inner grinding knife are sequentially installed on the grinding knife driving part.

3. The double-layer grinding hand-operated coffee machine as claimed in claim 1, wherein a material guiding press ring is arranged on the primary mounting seat, the primary outer grinding knife is arranged in the primary mounting seat, and the upper end of the primary outer grinding knife is connected with the material guiding press ring; a material guide support ring is arranged below the second-stage mounting seat, and the second-stage external grinding cutter is arranged in the second-stage mounting seat through the material guide support ring.

4. The double-layer grinding hand-operated coffee machine as claimed in claim 2, wherein a rotating shaft seat is arranged in the main housing, the rotating shaft seat is arranged at the center of the main housing through a plurality of partition plates which are evenly distributed, and the rotating shafts are respectively arranged at the upper end and the lower end of the rotating shaft seat through a bearing.

5. The double-layer grinding hand-operated coffee machine according to claim 3, wherein the upper end of the secondary mounting seat is provided with a central bearing seat hole, the central bearing seat hole is arranged in the middle of the upper end of the secondary mounting seat through a plurality of support rib plates, the rotating shaft is arranged in the central bearing seat hole in a penetrating manner through a bearing, the rotating shaft is sleeved with a primary inner grinding cutter at the upper end of the central bearing seat hole, and the secondary inner grinding cutter is sleeved at the lower end of the central bearing seat hole.

6. The double-layer grinding hand-operated coffee machine as claimed in claim 2, wherein the adjusting rotary frame is provided with a central shaft hole, the central shaft hole is arranged at the center of the adjusting rotary frame through a plurality of supporting ribs, and the rotating shaft is arranged in the central shaft hole through a positioning supporting sleeve and a shaft shoulder.

7. The double-layer grinding hand-operated coffee machine as claimed in claim 6, wherein a limiting guide ring is further arranged between the rotary cover and the upper end of the main shell, and the limiting guide ring is used for limiting the axial movement of the adjusting rotary ring; adjust the change inner wall and evenly be provided with the scale groove, it establishes to adjust the change cover main casing body upper portion just is in spacing guide ring below, correspond on the main casing body the scale groove evenly is provided with a plurality of balls.

8. The double-layer grinding hand-operated coffee machine as claimed in claim 7, wherein the upper end of the main housing is provided with a plurality of rotation stopping grooves, the outer peripheral wall of the adjusting rotating frame is provided with a raised threaded portion corresponding to the rotation stopping grooves, the raised threaded portion and the rotation stopping grooves are matched to limit the adjusting rotating frame to rotate relative to the main housing, and the raised threaded portion and the adjusting threaded portion of the inner wall of the adjusting rotating ring are matched with each other.

9. The double-layer grinding hand-operated coffee machine as claimed in claim 2, wherein a bearing retainer ring is arranged at the lower end of the shaft connecting piece, a connecting thread portion is arranged at the upper end of the shaft connecting piece, a plurality of bearings are arranged between the shaft end retainer ring and the connecting thread portion, the shaft connecting piece is mounted in the rotary cover through a plurality of bearings, a spline shaft hole is arranged in the shaft connecting piece, gap shaft holes are formed in the upper end and the lower end of the spline shaft hole, and the length of the spline shaft hole is smaller than that of the spline end at the upper end of the rotary shaft.

10. The double-layer grinding hand-operated coffee machine as claimed in claim 1, further comprising a rotating handle, wherein one end of the rotating handle is provided with a handle, and the other end of the rotating handle is connected with the rotating handle seat through a connecting limiting piece; the rotating handle drives the rotating handle seat to drive the shaft connecting piece to rotate, and the shaft connecting piece drives the rotating shaft to rotate through the spline end.

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