CN112168016A

CN112168016A - Grinding device

Info

Publication number: CN112168016A
Application number: CN202011076830.4A
Authority: CN
Inventors: 金文�; 胡伟; 张勇
Original assignee: Ningbo Kedly Appliance Industry Co ltd
Current assignee: Ningbo Kedly Appliance Industry Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-01-05
Also published as: WO2022073523A1

Abstract

The invention discloses a grinding device, which comprises a first grinding head, a driving mechanism for driving the first grinding head to rotate around a rotation axis, a base fixedly connected with the driving mechanism and provided with a first blocking part, a movable adjusting piece arranged on the base and capable of moving along the rotation axis direction, a second grinding head forming a grinding gap with the first grinding head, and an adjusting limiting piece provided with a limiting part matched with the first blocking part for limiting; the second grinding head is detachably fixed on the movable adjusting piece so that the second grinding head can move along with the movable adjusting piece to adjust the grinding gap; the adjusting limiting part and the movable adjusting part are detachably and fixedly connected so that the adjusting limiting part and the movable adjusting part can be adjusted in position at the same time, and therefore the limiting part is driven to be close to or far away from the first blocking part; when the limiting part approaches to the first blocking part, the grinding gap is reduced; when the limiting part is blocked by the first blocking part, the grinding gap is the minimum value. The grinding device can conveniently and uniformly adjust the grinding gap of the grinding device, and the user experience is strong.

Description

Grinding device

Technical Field

The invention belongs to the field of grinding devices, and particularly relates to a grinding device.

Background

With the gradual development of national economy, the requirements of people on the quality of life are higher and higher, and coffee as a daily drink has entered many common families. The quality of coffee is critical to the quality of coffee beans, but the taste of coffee depends on the freshness of the coffee powder. Even the coffee beans with good quality are ground into coffee powder and then placed for a certain time, the quality of the coffee beans is reduced to a certain extent. Based on this, more and more coffee loyalty enthusiasts prefer to have a coffee bean grinder for themselves, by grinding coffee beans to get fresher coffee powder.

Chinese patent application (entitled: a bean grinding mechanism and a bean grinding apparatus; application No. 201720938653.3) discloses a bean grinding mechanism having an upper grinding wheel and a lower grinding wheel, the lower grinding wheel being mounted on a motor shaft, the upper grinding wheel being mounted on a holder base by a screw, the upper grinding wheel being capable of adjusting a gap between the upper grinding wheel and the lower grinding wheel up and down by the screw, thereby adjusting the coffee grinding thickness.

However, the inventor researches and discovers that although the thickness degree during grinding can be adjusted by the arrangement mode, in actual production and assembly, due to the existence of assembly errors, the downward extending lengths of the motor shafts after being installed may be inconsistent, that is, the grinding gaps may be actually unequal when the upper grinding wheels are adjusted to the same positions by different bean grinding mechanisms, so that the difference of use experiences obtained by users is large, and the users may consider that the quality control of manufacturers is problematic, thereby affecting the product evaluation. However, if the assembly of each bean grinding mechanism is adjusted to be uniform during production, great manpower is consumed, the production cost is greatly increased, and the production efficiency is reduced.

Therefore, a new technology is needed to solve the problem that the grinding gap adjustment of the grinding device in the prior art is not uniform and affects the product evaluation.

Disclosure of Invention

In order to solve the above problems in the prior art, the present invention provides a polishing apparatus, which can conveniently and uniformly adjust a polishing gap of the polishing apparatus.

The invention adopts the following technical scheme:

a grinding apparatus comprising:

a first grinding head;

a drive mechanism having an output shaft detachably connected to the first grinding head for driving the first grinding head to rotate about a rotation axis;

the seat body is fixedly connected with the driving mechanism, and a first blocking part is arranged on the seat body;

the movable adjusting piece is arranged on the seat body and can adjust the position along the direction of the rotating axis;

the second grinding head and the first grinding head form a grinding gap; the second grinding head is detachably fixed on the movable adjusting piece, so that the second grinding head can be adjusted in position along with the movable adjusting piece to adjust the size of the grinding gap;

the adjusting limiting part is provided with a limiting part which is matched with the first blocking part for limiting; the adjusting limiting part and the moving adjusting part are detachably and fixedly connected so that the adjusting limiting part and the moving adjusting part can be adjusted in position at the same time, and therefore the limiting part is driven to be close to or far away from the first blocking part; when the limiting part approaches to the first blocking part, the grinding gap is reduced; when the limiting part is blocked by the first blocking part, the grinding gap is the minimum value.

As a further improvement of the technical solution of the present invention, the seat body is provided with a first threaded hole along the direction of the rotation axis, and one end of the movable adjusting member is a first external threaded section matched with the first threaded hole.

As a further improvement of the technical scheme of the present invention, one end of the seat body close to the grinding gap is provided with a circumferential surface coaxial with the first threaded hole, the circumferential surface is provided with an arc-shaped movable groove for the movement of the limiting portion, and the first blocking portion is located at one end of the arc-shaped movable groove close to the grinding gap.

As a further improvement of the technical solution of the present invention, a second blocking portion is disposed at the other end of the arc-shaped movable groove, and when the limiting portion approaches the second blocking portion, the grinding gap is enlarged, so that the grinding gap is the maximum value when the limiting portion is blocked by the second blocking portion.

As a further improvement of the technical scheme of the invention, the seat body comprises a cylindrical end provided with the circumferential surface;

the adjusting limiting part comprises a side ring part which surrounds the circumferential surface and is rotatably connected with the cylindrical end, and an end plate part which is fixedly connected with one end of the side ring part, which is far away from the base body, wherein the limiting part is positioned on one surface of the side ring part, which is opposite to the circumferential surface; the end plate part is detachably and fixedly connected with the movable adjusting part.

As a further improvement of the technical scheme of the invention, the device also comprises a limiting fixing piece;

remove the regulating part still including locating first external screw thread section is kept away from the spacing chimb of pedestal one end, spacing mounting with end plate portion fixed connection will spacing chimb presss from both sides tightly to be fixed spacing mounting with between the end plate portion.

As a further improvement of the technical scheme of the invention, the limiting convex edge is circumferentially and fixedly connected with the limiting fixing piece.

As a further improvement of the technical scheme of the invention, one surface of the limiting convex edge, which is far away from the seat body, is provided with a first annular tooth which is coaxial with the first threaded hole; the limiting fixing piece faces one face of the limiting convex edge, and a second annular tooth matched with the first annular tooth is arranged on the face of the limiting fixing piece facing the limiting convex edge.

As a further improvement of the technical scheme of the invention, a circle of adjusting scales are annularly arranged on the seat body, and the adjusting limiting part is provided with an indicating mark corresponding to the adjusting scales.

As a further improvement of the technical solution of the present invention, the present invention further includes a lock mechanism, the lock mechanism including:

the plurality of positioning grooves are arranged on one of the seat body and the adjusting limiting part, and are annularly arranged around the axis of the first threaded hole;

the push rod is telescopically inserted into the other one of the seat body and the adjusting limiting part and can stretch and retract to be inserted into or separated from the positioning groove.

As a further improvement of the technical solution of the present invention, the locking mechanism further includes an elastic member for pushing the push rod toward the direction of the positioning groove, the positioning groove is a spherical groove, and one end of the push rod inserted into the positioning groove is a smooth end portion adapted to the spherical groove.

As a further improvement of the technical scheme of the invention, the elastic piece is a spring sleeved on the ejector rod.

As a further improvement of the technical scheme of the invention, the movable adjusting piece is provided with a containing groove, and the second grinding head is fixed in the containing groove.

As a further improvement of the technical scheme of the invention, the side wall of the accommodating groove is provided with a protruding rotation limiting convex strip, and the second grinding head is provided with a rotation limiting clamping groove for embedding the limiting convex strip;

the second grinding head is fixedly clamped in the accommodating groove through a threaded connection.

As a further improvement of the technical scheme of the invention, the grinding device further comprises a cover body which envelopes the first grinding head and the second grinding head so as to separate the first grinding head and the second grinding head from the outside, and the cover body is fixedly connected with the thread limiting piece.

As a further improvement of the technical scheme of the present invention, the cover body and the thread limit piece are integrally formed.

As a further improvement of the technical scheme of the invention, one end of the cover body, which is far away from the seat body, is provided with a powder outlet.

As a further improvement of the technical scheme of the invention, one end of the cover body, which is far away from the base body, is provided with a powder guide inclined plane, and the powder outlet is positioned at the lower end of the powder guide inclined plane.

As a further improvement of the technical scheme of the invention, the grinding machine further comprises a storage bin for containing grinding raw materials, wherein the storage bin is arranged on the seat body, and the seat body is provided with a feeding channel for communicating the storage bin with the grinding gap.

As a further improvement of the technical scheme of the invention, the upper end of the storage bin is a feeding port.

As a further improvement of the technical scheme of the invention, the automatic feeding device also comprises a bin cover for closing the feeding port.

As a further improvement of the technical scheme of the invention, the first grinding head is a conical grinding fluted disc, and the second grinding head is a circular fluted disc matched with the conical grinding fluted disc.

As a further improvement of the technical solution of the present invention, the driving mechanism is a motor, and the grinding apparatus further includes a control device for controlling the start and stop of the motor, and a power supply unit for supplying power to the motor and the control device.

As a further improvement of the technical solution of the present invention, the power supply portion includes a storage battery and a charging interface for charging the storage battery.

As a further improvement of the technical scheme of the invention, the control device comprises a control circuit board and a control switch.

As a further improvement of the technical scheme of the invention, the device also comprises a longitudinally arranged conduit, a trigger switch arranged adjacent to the lower end of the conduit and a trigger element which can be movably arranged in the conduit up and down; the trigger switch is electrically connected with the control circuit board and is used for controlling the connection or disconnection of the circuit of the control circuit board; when the trigger element is positioned at one end of the conduit adjacent to the trigger switch, the trigger switch is triggered to connect the circuit.

As a further improvement of the technical scheme of the invention, the trigger switch is a Hall switch, and the trigger element is a magnet.

Compared with the prior art, the invention has the beneficial effects that:

in the grinding device, the second grinding head realizes the adjustment of the grinding gap by moving and adjusting the movable adjusting piece on the seat body, and the limit part of the adjusting limit piece is blocked by the first blocking part on the seat body, so that the adjusting range of the movable adjusting piece connected with the adjusting limit piece is limited. Under this kind of structural arrangement, this grinder is when the equipment of leaving the factory, after installing actuating mechanism and first bistrique, can adjust the removal regulating part earlier and make the grinding clearance adjust to the minimum value h of settlement, then support first stop part with spacing portion and will adjust the locating part and fix with removing the regulating part, connect the back, the grinding clearance can be adjusted to h at minimum. In other words, the minimum value of the grinding gap can be determined by adjusting the positions of the adjusting limiting part and the moving adjusting part during assembly of the grinding device, the installation error of the driving mechanism is not required to be considered, so that the minimum grinding gap of each adjusted grinding device is uniform and equal, standardization is achieved, the efficiency is higher during assembly, the user experience feeling is strong, and the product evaluation of a user is facilitated.

Drawings

The technology of the present invention will be described in further detail with reference to the accompanying drawings and detailed description below:

FIG. 1 is a cross-sectional view of the grinding apparatus of the present invention;

FIG. 2 is a cross-sectional view from another perspective of the grinding apparatus of the present invention;

FIG. 3 is a schematic view of the drive mechanism of the present invention;

FIG. 4 is an exploded view of the drive mechanism of the present invention;

FIG. 5 is a schematic view of the base of the present invention;

fig. 6 is an exploded view of the housing of the present invention;

FIG. 7 is an exploded view of the assembly of the base, the movable adjusting member, the adjusting position limiting member and the limiting fixing member of the present invention;

fig. 8 is an exploded view of the seat, the movable adjusting member, the adjusting limiting member and the limiting fixing member of the present invention from another view angle;

fig. 9 is an exploded view of the assembly of the housing, the movement adjuster, the first grinding head, the second grinding head, and the cover of the present invention;

FIG. 10 is an exploded view of the entire grinder assembly of the present invention;

fig. 11 is an overall assembly view of the grinding apparatus of the present invention.

Reference numerals:

10-a first grinding head;

20-a drive mechanism; 201-output shaft; 202-a nut; 203-a storage battery; 2031-a charging interface; 204-a control circuit board; 205-control switch; 206-a catheter; 207-trigger switch; 208-a trigger element; 209-inner shell;

30-a seat body; 301-a first threaded hole; 302-circumferential surface; 303-arc movable groove; 304-cylindrical end; 305-adjusting the scale; 306-mounting holes; 307-a feed channel; 308-a first barrier; 309-a second barrier;

40-moving the adjusting member; 401-a first external thread section; 402-a limiting flange; 4021-a first annular tooth; 403-a receiving groove; 4031-rotation limit raised line; 404-a thread stop;

50-a second grinding head; 501-rotating a limit card slot;

60-adjusting a limit stop; 601-a limiting part; 602-side ring section; 603-end plate portion; 604-indication identification;

70-limiting fixing piece; 701-second ring-shaped teeth;

80-a locking mechanism; 801-positioning grooves; 802-a mandrel; 8021-rounding the ends; 803-an elastic member;

90-a housing; 901-powder outlet; 902-powder guide inclined plane;

100-a storage bin; 1001-feeding port; 1002-cabin cover.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The same reference numbers will be used throughout the drawings to refer to the same or like parts.

It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Further, the description of the upper, lower, left, right, etc. used in the present invention is only with respect to the positional relationship of the respective components of the present invention with respect to each other in the drawings.

Referring to fig. 1 to 11, a grinding apparatus includes a first grinding wheel head 10, a driving mechanism 20, a base body 30, a movement adjusting member 40, a second grinding wheel head 50, and an adjustment limiting member 60.

Wherein, referring to fig. 1 to 4, 10, the driving mechanism 20 has an output shaft 201 detachably connected to the first grinding head for driving the first grinding head 10 to rotate about the rotational axis. The driving mechanism 20 may be a manual rocker or a motor, and is detachably connected and fixed to the first grinding head 10 through an output shaft 201 to drive the first grinding head 10 to rotate. More specifically, the end of the output shaft 201 is a flat head and is threaded, the first grinding head 10 is fittingly sleeved on the flat head to be circumferentially fixed with the output shaft 201, and then the first grinding head 10 is screwed and fixed at the end of the output shaft 201 through the nut 202.

Referring to fig. 1, 5 and 6, the housing 30 is fixedly connected to the driving mechanism 20 for fixing the driving mechanism 20 and, in addition, for mounting the second grinding head 50. The seat 30 is provided with a through hole for the output shaft 201 of the driving mechanism 20 to extend out. As shown in fig. 7, a first blocking portion 308 is disposed on the seat 30.

Referring to fig. 1 and 7, the movable adjusting member 40 is mounted on the seat 30 and can be adjusted in position along the direction of the rotation axis; a grinding gap is formed between the second grinding head 50 and the first grinding head 10, and the second grinding head 50 is detachably fixed on the movable adjusting member 40, so that the second grinding head 50 can be adjusted in position along with the movable adjusting member 40 to adjust the size of the grinding gap. That is, by adjusting the position of the movable adjusting member 40 on the housing 30, the position of the second grinding stone 50 can be adjusted, thereby adjusting the size of the grinding gap. The grinding gap can grind the material to be ground entering the grinding gap into fine powder, and the specific thickness of the powder is determined according to the size of the grinding gap. The material to be ground may be coffee beans.

Referring to fig. 1, 7 and 8, the adjustment limiting member 60 is provided with a limiting portion 601 for limiting the first blocking portion in a matching manner; the adjustment limiting member 60 and the movable adjusting member 40 are detachably and fixedly connected to enable the two members to adjust positions at the same time, so as to drive the limiting portion 601 to approach or depart from the first blocking portion 308. When the limiting part 601 approaches the first blocking part 308, the grinding gap is reduced; when the limiting portion 601 is blocked by the first blocking portion 308, the grinding gap is a minimum value. In other words, when the grinding gap is adjusted to be larger, the first blocking portion 308 does not block the movement of the limiting portion 601, and when the grinding gap is adjusted to be larger, the limiting portion 601 continuously approaches the first blocking portion 308 until the limiting portion 601 contacts the first blocking portion 308, and at this time, the limiting portion 601 is blocked and cannot move continuously, and the grinding gap reaches the minimum value.

Based on the above structure, in the grinding apparatus of the present invention, the second grinding head 50 adjusts the grinding gap by moving the adjusting member 40 on the base 30, and the first blocking portion 308 of the base 30 blocks the limiting portion 601 of the adjusting limiting member 60, so as to limit the adjusting range of the moving adjusting member 40 connected to the adjusting limiting member 60. Under the structure, when the grinding device is shipped from a factory, after the driving mechanism 20 and the first grinding head 10 are installed, the movable adjusting member 40 can be adjusted to adjust the grinding gap to a set minimum value h, then the limiting part 601 abuts against the first blocking part 308 and the adjusting limiting part 60 and the movable adjusting member 40 are fixed, and after the connection is completed, the grinding gap of the grinding device can be adjusted to h at the minimum value. In other words, the minimum value of the polishing clearance can be determined by adjusting the positions of the adjustment limiting member 60 and the movement adjusting member 40 during assembly of the polishing apparatus, and the mounting error of the driving mechanism 20 does not need to be considered, so that the minimum polishing clearance of each adjusted polishing apparatus is uniform and equal, standardization is achieved, and the efficiency during assembly is higher. In addition, in the invention, the first grinding head 10 and the second grinding head 50 are independently detachable or fixed, so that the product is convenient to clean, and the cleanliness of the product is ensured.

Specifically, referring to fig. 1, 5 and 6, the seat body 30 is provided with a first threaded hole 301 along the direction of the rotation axis, and one end of the movable adjusting member 40 is a first external threaded section 401 matched with the first threaded hole 301. The positional adjustment of the movable adjusting member 40 on the housing 30 is achieved by means of screw adjustment, thereby bringing the second grinding stone 50 to adjust the grinding gap. Preferably, the first threaded hole 301 is arranged coaxially with the rotation axis.

Referring to fig. 7, since the position adjustment is realized by the movable adjusting member 40 and the seat body 30 in a threaded manner, the movable adjusting member 40 rotates during the adjustment movement, which causes the adjustment limiting member 60 to rotate accordingly, in other words, the track of the limiting portion 601 during the movement is also rotational, and based on this point, the first blocking portion 308 should be located on the arc-shaped movement track of the limiting portion 601. Specifically, a circumferential surface 302 coaxial with the first threaded hole 301 is disposed at one end of the seat body 30 close to the grinding gap, an arc-shaped movable groove 303 for allowing the limiting portion 601 to move along with the movement of the movement adjusting member 40 is disposed on the circumferential surface 302 to adapt to the arc-shaped moving track, the first blocking portion 308 is disposed at one end of the arc-shaped movable groove 303 close to the grinding gap, when the limiting portion 601 moves towards the first grinding head 10, that is, when the grinding gap is reduced, the limiting portion moves to the end of the arc-shaped movable groove 303, and the end of the arc-shaped movable groove 303 is blocked by the first blocking portion 308, so that the minimum grinding gap is achieved. In the present invention, the position-limiting portion 601 is a small protruding block, and the first blocking portion 308 is a groove wall at the end of the arc-shaped movable groove 303.

The other end of the arc-shaped movable groove 303 is provided with a second blocking portion 309, and when the limiting portion 601 approaches the second blocking portion 309, the grinding gap is enlarged, so that the grinding gap is the maximum value when the limiting portion 601 is blocked by the second blocking portion 309. That is, the grinding gap is adjusted when the stopper 601 moves in the arc-shaped movable groove 303, and is reduced when the stopper moves closer to the first stopper 308, and is increased when the stopper moves closer to the second stopper 309. Based on this, the adjusting range of the grinding gap of the grinding device of the invention is limited and clear.

Specifically, referring to fig. 7 and 8, the seat body 30 includes a cylindrical end 304 provided with the circumferential surface 302; the adjustment limiting member 60 includes a side ring portion 602 surrounding the circumferential surface 302 to be rotatably connected with the cylindrical end 304, and an end plate portion 603 fixedly connected with one end of the side ring portion 602 away from the seat body 30, wherein the limiting portion 601 is located on one surface of the side ring portion 602 opposite to the circumferential surface 302; the end plate portion 603 is detachably and fixedly connected to the movement regulating member 40. That is, the adjusting limiting member 60 is annular and is sleeved on the cylindrical end 304 of the base 30, and the movement of the limiting portion 601 relative to the first blocking portion 308 can be realized by integrally rotating the adjusting limiting member 60, so as to drive the moving adjusting member 40 and the second grinding head 50 to adjust the grinding gap.

In order to realize the detachable connection between the movable adjusting member 40 and the adjustment limiting member 60, referring to fig. 7 and 8, the grinding apparatus of the present invention further includes a limiting fixing member 70, the movable adjusting member 40 further includes a limiting convex edge 402 disposed at an end of the first external thread section 401 away from the seat body 30, and the limiting fixing member 70 is fixedly connected to the end plate portion 603 and clamps and fixes the limiting convex edge 402 between the limiting fixing member 70 and the end plate portion 603. By adopting the clamping and fixing manner, when the position of the movable adjusting part 40 on the seat body 30 is required to be adjusted to change the grinding gap at the beginning of assembly, the connection between the movable adjusting part 40 and the adjusting and limiting part 60 is not affected, i.e. no matter which position the movable adjusting part 40 rotates to, the adjusting and limiting part 60 does not need to move together with the movable adjusting part 60 at this time, when the grinding gap is adjusted to reach the predetermined minimum gap, the adjusting and limiting part 60 is rotated to the limiting part 601 to abut against the first blocking part 308, and then the limiting and fixing part 70 is matched with the adjusting and limiting part 60 to clamp and fix the limiting convex edge 402 of the movable adjusting part 40 (the limiting convex edge 402 is a circle, and can be clamped no matter which angle the limiting convex edge 402 rotates), so that the.

In order to ensure that the relative rotation between the movable adjusting member 40 and the adjusting limiting member 60 does not affect the grinding gap after clamping, the limiting flange 402 is fixedly connected with the limiting fixture 70 in the circumferential direction. Specifically, referring to fig. 7 and 8, a first annular tooth 4021 coaxial with the first threaded hole 301 is disposed on a surface of the limiting flange 402 away from the seat body 30; the surface of the limiting fixing piece 70 facing the limiting convex edge 402 is provided with a second annular tooth 701 matched with the first annular tooth 4021. Namely, the circumferential fixation is realized by the engagement and the limit of the first annular tooth 4021 and the second annular tooth 701, and the relative rotation between the movable adjusting member 40 and the adjustment limiting member 60 is avoided. The first annular tooth 4021 and the second annular tooth 701 are matched for limiting, so that the movable adjusting piece 40 and the adjusting limiting piece 60 can be fixed at any staggered angle, the position of the movable adjusting piece 40 can be adjusted at will when the movable adjusting piece is assembled at first, the movable adjusting piece can be limited and fixed with the adjusting limiting piece 60 after being adjusted, and fixed alignment does not need to be considered.

As a preferred embodiment of the present invention, referring to fig. 3, the seat body 30 is provided with a circle of adjustment scales 305, referring to fig. 7, the adjustment limiting member 60 is provided with an indication mark 604 corresponding to the adjustment scales 305, that is, a user can determine the adjustment amount by judging through the indication mark 604 and the adjustment scales 305 when adjusting the grinding gap. Preferably, the housing 30 is transparent, and the adjustment scale 305 can also be disposed on the driving mechanism 20, so that the adjustment scale 305 can be seen through the housing 30.

When the grinding gap is adjusted to reach the required size, the grinding gap needs to be kept unchanged in the grinding process, and the phenomenon that the grinding gap is changed due to the fact that the acting force generated by grinding drives the second grinding head 50 and the movable adjusting piece 40 to move in the grinding process is avoided, and therefore the grinding particles are uneven in thickness. Based on this, the grinding device of the present invention further includes a locking mechanism 80, referring to fig. 6 and 8, the locking mechanism 80 includes a plurality of positioning grooves 801 provided on one of the seat body 30 and the adjustment limiting member 60, and each of the positioning grooves 801 is annularly arranged around an axis of the first threaded hole 301; the adjusting device further comprises a top rod 802 telescopically inserted into the other one of the seat body 30 and the adjusting limiting member 60, wherein the top rod 802 can be extended and retracted to be inserted into or disengaged from the positioning groove 801.

In one embodiment, the top rod 802 is disposed on the base 30, the base 30 is provided with a mounting hole 306 for the top rod 802 to be inserted and extended, and each positioning groove 801 is disposed on the adjustment limiting member 60, when the grinding gap needs to be adjusted, the top rod 802 is firstly retracted into the mounting hole 306 to make the top rod 802 come out of the positioning groove 801, at this time, the adjustment limiting member 60 can rotate and drive the movable adjusting member 40 and the second grinding head 50 to rotate together, and when the grinding gap reaches a desired size, the top rod 802 is then extended out and inserted into the positioning groove 801 corresponding to the top rod 802. After the insertion, the adjustment limiting member 60 is relatively fixed to the seat body 30 and cannot rotate continuously, so that the grinding gap is stable and does not change. When adjustment is needed again, the top rod 802 needs to be pulled out of the positioning groove 801 again.

In another embodiment, the top rod 802 is disposed on the adjustment limiting member 60, the adjustment limiting member 60 is disposed with a mounting hole 306 for the top rod 802 to insert and extend, and each positioning groove 801 is disposed on the base 30, when the grinding gap needs to be adjusted, the top rod 802 retracts into the mounting hole 306 to make the top rod 802 get out of the positioning groove 801, at this time, the adjustment limiting member 60 can rotate and drive the movable adjusting member 40 and the second grinding head 50 to rotate together, when the grinding gap reaches a desired size, the top rod 802 extends out and is inserted into the current positioning groove 801 corresponding thereto, after insertion, the adjustment limiting member 60 and the base 30 are relatively fixed and cannot rotate continuously, thereby achieving the stability of the grinding gap without any change. When adjustment is needed again, the top rod 802 needs to be pulled out of the positioning groove 801 again.

Preferably, referring to fig. 6 and 8, the locking mechanism 80 further includes an elastic member 803 for pushing the top rod 802 toward the direction of the positioning groove 801, the positioning groove 801 is a spherical groove, and one end of the top rod 802 inserted into the positioning groove 801 is a rounded end portion 8021 adapted to the spherical groove. The elastic member 803 is specifically located in the mounting hole 306 for the top bar 802 to extend and retract, one end of the elastic member abuts against the bottom of the mounting hole 306, a circle of raised rings are arranged on the top bar 802, and the other end of the elastic member 803 abuts against the raised rings, so that the trend of pushing the top bar 802 outwards is maintained. The elastic member 803 is a spring fitted on the top bar 802, and may be an elastic rubber pad in the mounting hole 306. The arrangement of the smooth end 8021 of the top rod 802 and the spherical groove enables the spherical groove to overcome the elasticity of the elastic member 803 more easily through the spherical surface to press down the top rod 802 to enable the smooth end 8021 of the top rod 802 to be separated from the spherical groove when the adjusting and limiting member 60 is subjected to the rotating torsion, and the adjusting and limiting member 60 can be rotated to change the grinding gap after the separation; when the adjustment limiting member 60 rotates to another spherical groove, the ejector rod 802 is inserted into the spherical groove again under the elastic force of the elastic member 803 to achieve fixation, and if the grinding gap does not meet the requirement, the ejector rod 802 can continue to rotate, so that the ejector rod 802 is disengaged from the spherical groove again to continue to adjust the grinding gap. Under the design, a user can easily adjust the grinding gap by twisting the adjusting limiting piece 60, and the adjusted ejector rod 802 can automatically fix the adjusting limiting piece 60 under the action of the elastic piece 803, so that the grinding gap is ensured not to be changed, and the grinding machine is more convenient.

The connection of the second grinding wheel 50 to the movable adjustment member 40 will be explained as follows: referring to fig. 7 and 9, the movement adjusting member 40 is provided with a receiving groove 403, and the second grinding wheel 50 is fixed in the receiving groove 403. The second grinding stones 50, fixed in the receiving grooves 403, are moved together with the movement adjusting members 40 to change the gaps between the first grinding stones 10 and the second grinding stones, thereby changing the grinding gaps. Specifically, the movable adjusting member 40 is also provided with a through hole for passing the output shaft 201 of the drive mechanism 20, and the second grinding stones 50 are also provided with a through hole for passing the output shaft 201.

In one embodiment, referring to fig. 9, a protruding rotation limiting protruding strip 4031 is disposed on a side wall of the accommodating groove 403, and a rotation limiting locking groove 501 into which the limiting protruding strip is inserted is disposed on the second grinding head 50;

the grinding device further comprises a thread limiting piece 404, wherein the thread limiting piece 404 is fixedly connected with the notch of the accommodating groove 403 through threads, so that the second grinding head 50 is clamped and fixed in the accommodating groove. The circumferential fixation between the second grinding head 50 and the movable adjusting piece 40 is realized through the matching of the rotation limiting convex strip 4031 and the rotation limiting clamping groove 501, so that when the movable adjusting piece 40 rotates, the second grinding head 50 rotates along with the movable adjusting piece 40; the second grinding head 50 and the movable adjusting member 40 are limited along the axial direction by the groove bottoms of the thread limiting piece 404 and the accommodating groove 403, so that the second grinding head 50 and the movable adjusting member 40 are fixed in the axial direction. Specifically, the inner wall of the receiving groove 403 is provided with an internal thread at an end away from the bottom of the groove, the thread limiting member 404 is annular, and an external thread is provided on an outer circumferential surface thereof, and the second grinding head 50 is fixed in the receiving groove 403 by the internal thread and the external thread being matched and fixed.

Preferably, referring to fig. 1, 2 and 9 to 11, the grinding apparatus of the present invention further includes a housing 90 enclosing the first grinding head 10 and the second grinding head 50 to separate the first grinding head 10 and the second grinding head 50 from the outside, in order to prevent a situation where a person is injured during grinding. The cover 90 may be fixedly connected to the base 30, or may be fixedly connected to the thread-limiting member 404. Preferably, the cover 90 is fixedly connected to the thread stop 404. More preferably, the housing 90 is integrally formed with the thread stop 404 so that the housing 90 is installed when the second grinding wheel 50 is clamped.

Referring to fig. 1, 2 and 9 to 11, in the present invention, the first grinding head 10 and the second grinding head 50 are both located below the base 30 during grinding, so the cover 90 is also located below the base 30 to cover the two grinding heads, one end of the cover 90 away from the base 30 is provided with a powder outlet 901, that is, the bottom of the cover 90 is provided with the powder outlet 901, the powder generated after grinding falls under the action of gravity and is finally discharged from the powder outlet 901, and a user can place a cup below the powder outlet 901 to receive the fallen powder. In other words, the cover 90 can also play a role of collecting powder to prevent the powder from flying apart, in addition to a protective role.

Further, referring to fig. 1, fig. 2, and fig. 9 to fig. 11, one end of the cover 90 away from the seat 30 is provided with a powder guiding inclined plane 902, and the powder outlet 901 is located at a lower end of the powder guiding inclined plane 902. The powder guiding inclined plane 902 is inclined, and when powder falls on the powder guiding inclined plane 902, the powder slides down along the powder guiding inclined plane 902 and is finally discharged from the powder outlet 901 below the powder guiding inclined plane 902. That is, the powder guiding inclined plane 902 further plays a role in collecting powder, thereby facilitating the discharge of the powder and avoiding the powder from accumulating in the cover body 90 and being difficult to clean.

In addition, the grinding device of the present invention further includes a storage bin 100 for accommodating grinding raw materials, referring to fig. 1, 6, 8 and 10, the storage bin 100 is disposed on the seat 30, during the grinding process, the storage bin 100 is located above the grinding gap, and the seat 30 is provided with a feeding channel 307 for communicating the storage bin 100 with the grinding gap. The ground material may be coffee beans or other material to be ground. The grinding raw material is loaded in the storage bin 100, and when grinding is performed, the grinding raw material enters the grinding gap along the feeding channel 307 under the action of gravity without being manually fed.

Specifically, referring to fig. 1, 6, 8 and 10, the upper end of the storage bin 100 is a material inlet 1001, and the storage bin 100 further includes a bin cover 1002 for closing the material inlet 1001, so as to prevent external foreign matters from entering the storage bin 100. In the present invention, the storage bin 100 and the seat 30 are fixed together, preferably, they are connected together to form a whole.

The first grinding stones 10 and the second grinding stones 50 are arranged one above the other, and the first grinding stones 10 may be positioned above the second grinding stones 50 or may be positioned below the second grinding stones 50, depending on the specific forms of the first grinding stones 10 and the second grinding stones 50. In the present invention, referring to fig. 1, 2, 9 to 11, preferably, the first grinding head 10 is a tapered grinding toothed disc, the second grinding head 50 is a circular toothed disc matched with the tapered grinding toothed disc, an output shaft 201 of the driving mechanism 20 passes through the second grinding head 50, the first grinding head 10 is located at a distal end of the output shaft 201, and when grinding is performed, the first grinding head 10 is located below the second grinding head 50.

In one embodiment, the driving mechanism 20 is a motor, and the grinding apparatus further comprises a control device for controlling the start and stop of the motor, and a power supply portion for supplying power to the motor and the control device. The working state of the motor is controlled by the control device so as to control the starting and stopping of the grinding. Specifically, the power supply portion includes a storage battery 203 and a charging interface 2031 for charging the storage battery 203, and the storage battery 203 may be a rechargeable lithium battery. The storage battery 203 is arranged, so that the portable grinding device can be conveniently carried, whether a power supply exists in a use place or not is not required to be considered, and the storage battery 203 can be charged through the charging interface 2031. The control device comprises a control circuit board 204 and a control switch 205, and the control switch 205 can be arranged on the outer surface of the storage bin 100 and is arranged in a button type, and a user can start the motor or stop the motor by pressing the button. In addition, an inner housing 209 is provided to cover the driving mechanism 20, the control circuit board 204 and the battery 203 integrally, and then installed in the storage bin 100, and the upper end of the inner housing 209 is an inclined surface to facilitate the coffee beans in the storage bin 100 to slide down.

The first grinding head 10 and the second grinding head 50 of the present invention are independently detachable, and since the motor of the present invention is controlled by a button, there is a possibility that the button is pressed to start grinding during the detachment to cause injury to a user. To avoid this, referring to fig. 4 and 10, the driving mechanism further includes a longitudinally disposed guide tube 206, a trigger switch 207 disposed adjacent to a lower end of the guide tube 206, and a trigger member 208 movably disposed up and down within the guide tube 206; the trigger switch 207 is electrically connected with the control circuit board 204 and is used for controlling the connection or disconnection of the circuit of the control circuit board 204; when the trigger element 208 is located at an end of the conduit 206 adjacent to the trigger switch 207, the trigger switch 207 is triggered to complete the circuit.

In the invention, the storage bin 100 is arranged at the upper part during grinding, the first grinding head 10 and the second grinding head 50 are arranged at the lower part during grinding, and by arranging the trigger switch 207, the trigger element 208 is positioned at the lower end of the conduit 206 under the action of gravity during normal grinding (the lower end is adjacent to the trigger switch 207 at the moment), and at the moment, the trigger element 208 enables the trigger switch 207 to be communicated with a circuit, so that the driving mechanism 20 can normally rotate. When the user dismantles first bistrique 10 or second bistrique 50, in order to make things convenient for the dismantlement, can turn over whole grinder, first bistrique 10 this moment, second bistrique 50 are last, storage silo 100 is down, naturally, pipe 206, trigger switch 207 have also all been fallen over, trigger switch 207 is last this moment, and trigger element 208 is still down under the effect of gravity, can't trigger switch 207 this moment, the circuit does not communicate, therefore, even the user mistakenly touches the button this time, also can not start actuating mechanism 20, avoid causing the user to be injured. Specifically, the trigger switch 207 is a hall switch, and the trigger element 208 is a magnet, specifically a small magnet.

Other aspects of the polishing apparatus of the present invention are described in the prior art and will not be described herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A grinding apparatus, comprising:

a first grinding head;

2. The abrading device of claim 1, wherein: the base body is provided with a first threaded hole along the direction of the rotation axis, and one end of the movable adjusting piece is a first external thread section matched with the first threaded hole.

3. The abrading device of claim 2, wherein: the seat body is provided with a circumferential surface which is coaxial with the first threaded hole at one end close to the grinding gap, an arc-shaped movable groove for the limiting part to move is arranged on the circumferential surface, and the first blocking part is positioned at one end, close to the grinding gap, of the arc-shaped movable groove.

4. The abrading device of claim 3, wherein: the other end of the arc-shaped movable groove is provided with a second blocking part, and when the limiting part approaches to the second blocking part, the grinding gap is enlarged, so that the grinding gap is the maximum value when the limiting part is blocked by the second blocking part.

5. The abrading device of claim 3, wherein: the seat body comprises a cylindrical end provided with the circumferential surface;

6. The abrading device of claim 5, wherein: the device also comprises a limiting fixing piece;

7. The abrading device of claim 6, wherein: the limiting convex edge is circumferentially and fixedly connected with the limiting fixing piece.

8. The abrading device of claim 7, wherein: a first annular tooth coaxial with the first threaded hole is arranged on one surface of the limiting convex edge away from the seat body; the limiting fixing piece faces one face of the limiting convex edge, and a second annular tooth matched with the first annular tooth is arranged on the face of the limiting fixing piece facing the limiting convex edge.

9. The abrading device of claim 2, wherein: the pedestal is fitted with a contraceptive ring and is equipped with the round and adjusts the scale, adjust be equipped with on the locating part with adjust the corresponding indicator of scale.

10. The abrading device of claim 2, wherein: still include locking mechanical system, locking mechanical system includes:

11. The abrading device of claim 10, wherein: the locking mechanism further comprises an elastic piece which pushes the ejector rod to the direction of the positioning groove, the positioning groove is a spherical groove, and one end of the ejector rod, which is inserted into the positioning groove, is a smooth end portion matched with the spherical groove.

12. The abrading device of claim 11, wherein: the elastic piece is a spring sleeved on the ejector rod.

13. The abrading device of claim 1, wherein: the movable adjusting piece is provided with a containing groove, and the second grinding head is fixed in the containing groove.

14. The abrading device of claim 13, wherein: the side wall of the accommodating groove is provided with a protruding rotary limiting convex strip, and the second grinding head is provided with a rotary limiting clamping groove for embedding the limiting convex strip;

15. The abrading device of claim 14, wherein: the grinding head grinding device further comprises a cover body which envelopes the first grinding head and the second grinding head so as to separate the first grinding head and the second grinding head from the outside, and the cover body is fixedly connected with the thread limiting piece.

16. The abrading device of claim 15, wherein: the cover body and the thread limiting piece are integrally formed.

17. The abrading device of claim 15, wherein: one end of the cover body, which is far away from the seat body, is provided with a powder outlet.

18. The abrading device of claim 17, wherein: one end of the cover body, which is far away from the base body, is provided with a powder guide inclined plane, and the powder outlet is positioned at the lower end of the powder guide inclined plane.

19. The abrading device of claim 1, wherein: the grinding machine is characterized by further comprising a storage bin for containing grinding raw materials, wherein the storage bin is arranged on the base body, and the base body is provided with a feeding channel for communicating the storage bin with the grinding gap.

20. The abrading device of claim 19, wherein: the upper end of the storage bin is a feeding port.

21. The abrading device of claim 20, wherein: the device also comprises a bin cover for sealing the feeding port.

22. The abrading device of claim 1, wherein: the first grinding head is a conical grinding fluted disc, and the second grinding head is a circular fluted disc matched with the conical grinding fluted disc.

23. The abrading device of any one of claims 1-22, wherein: the grinding device comprises a grinding device, a driving mechanism and a power supply part, wherein the driving mechanism is a motor, the grinding device further comprises a control device and a power supply part, the control device is used for controlling the motor to start and stop, and the power supply part is used for supplying power to the motor and the control device.

24. The abrading device of claim 23, wherein: the power supply portion includes a storage battery and a charging interface for charging the storage battery.

25. The abrading device of claim 23, wherein: the control device comprises a control circuit board and a control switch.

26. The abrading device of claim 25, wherein: the device also comprises a longitudinally arranged guide pipe, a trigger switch arranged adjacent to the lower end of the guide pipe and a trigger element which is movably arranged in the guide pipe up and down; the trigger switch is electrically connected with the control circuit board and is used for controlling the connection or disconnection of the circuit of the control circuit board; when the trigger element is positioned at one end of the conduit adjacent to the trigger switch, the trigger switch is triggered to connect the circuit.

27. The abrading device of claim 26, wherein: the trigger switch is a Hall switch, and the trigger element is a magnet.