CN220069547U - Grinding wheel assembly and handheld bean grinder - Google Patents

Abstract

The utility model discloses a grinding wheel assembly and a handheld bean grinder, wherein the grinding wheel assembly comprises: a bean bin; an inner grinding wheel; the outer grinding wheel is sleeved on the inner grinding wheel, a grinding area is formed between the inner grinding wheel and the outer grinding wheel, and the inner grinding wheel and the outer grinding wheel rotate relatively to grind materials positioned in the grinding area; the supporting ring is fixedly connected with the lower end of the bean bin, the supporting ring is sleeved on the outer grinding wheel, the supporting ring and the bean bin are matched together to limit the outer grinding wheel to move in the up-down direction, the bean bin can limit the outer grinding wheel to rotate relative to the bean bin, and an elastic piece is arranged on the supporting ring; one side of the elastic piece, which is close to the axis of the supporting ring, is abutted against the outer circumferential surface of the outer grinding wheel so as to apply force to the outer grinding wheel towards the axis direction of the inner grinding wheel; the outer grinding wheel is in elastic contact with the bean bin through the elastic piece, the limit that the outer grinding wheel is fixedly connected to the bean bin is eliminated, the elastic piece can apply force towards the center to the outer peripheral wall of the outer grinding wheel, and concentricity of the outer grinding wheel and the inner grinding wheel is improved.

Description

Grinding wheel assembly and handheld bean grinder

Technical Field

The utility model relates to the technical field of bean grinding machines, in particular to a grinding wheel assembly and a handheld bean grinding machine.

Background

In the existing bean grinder, an outer grinding wheel is usually fixedly arranged in the bean grinder, and concentricity of the outer grinding wheel and an inner grinding wheel with tolerance is poor during assembly, so that coffee powder ground during relative rotation of the outer grinding wheel and the inner grinding wheel has different fineness.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model provides a grinding wheel assembly and a handheld bean grinder.

In a first aspect, embodiments of the present utility model provide a grinding wheel assembly comprising:

a bean bin;

an inner grinding wheel;

the outer grinding wheel is sleeved on the inner grinding wheel, a grinding area is formed between the inner grinding wheel and the outer grinding wheel, and the inner grinding wheel and the outer grinding wheel rotate relatively to grind materials positioned in the grinding area;

the support ring is fixedly connected with the lower end of the bean bin, the support ring is sleeved on the outer grinding wheel, the support ring is matched with the bean bin together to limit the outer grinding wheel to move in the up-down direction, the bean bin can limit the outer grinding wheel to rotate relative to the bean bin, and an elastic piece is arranged on the support ring; and one side, close to the axis of the supporting ring, of the elastic piece is abutted against the outer circumferential surface of the outer grinding wheel so as to apply force to the outer grinding wheel towards the axis direction of the inner grinding wheel.

The grinding wheel assembly provided by the embodiment of the utility model has at least the following technical effects: the outer grinding wheel is in elastic contact with the bean bin through the elastic piece, the limit that the outer grinding wheel is fixedly connected to the bean bin is eliminated, the elastic piece can apply force towards the center to the outer peripheral wall of the outer grinding wheel, and concentricity of the outer grinding wheel and the inner grinding wheel is improved.

According to some embodiments of the utility model, the inner side of the support ring protrudes upwards to form an annular support part, an annular accommodating area is formed between the upper end of the annular support part and the bean bin, the upper end of the outer grinding wheel protrudes in a direction away from the axis of the outer grinding wheel to form an annular protruding part, and the annular protruding part is inserted into the annular accommodating area.

According to some embodiments of the utility model, the inner side surface of the bean bin is provided with a positioning part protruding along the radial direction, the outer peripheral surface of the annular protruding part is provided with a first notch, and the positioning part is inserted into the first notch so that the bean bin limits the rotation of the outer grinding wheel.

According to some embodiments of the utility model, the plurality of positioning portions are circumferentially distributed around the axis of the bean bin, the plurality of first notches are circumferentially distributed around the axis of the annular protrusion, and the plurality of first notches are in one-to-one correspondence with the plurality of positioning portions.

According to some embodiments of the utility model, the support ring is provided with a plurality of placement grooves, the placement grooves are uniformly distributed circumferentially around the axis of the support ring, the placement grooves are in one-to-one correspondence with the elastic pieces, and the elastic pieces are arranged in the placement grooves.

According to some embodiments of the utility model, a side of the seating groove near the axis of the support ring has a second notch so that the elastic member portion passes through the second notch to abut against the outer peripheral surface of the outer grinding wheel.

In a second aspect, an embodiment of the present utility model further provides a handheld bean grinder, including:

a grinding wheel assembly according to an embodiment of the above first aspect of the utility model;

the host bin is provided with a driving motor;

the storage bin is positioned below the main machine bin, is detachably connected with the main machine bin and is connected with the grinding wheel assembly;

the powder bin is positioned below the bin and is detachably connected with the bin;

the upper end of the rotating shaft is connected with the driving motor, the lower end of the rotating shaft penetrates through the inner grinding wheel of the grinding wheel assembly, and the driving motor can drive the rotating shaft to rotate so as to drive the inner grinding wheel to rotate.

The handheld bean grinder provided by the embodiment of the utility model has at least the following technical effects: when the handheld bean grinder is started, the driving motor drives the axis to rotate so as to drive the inner grinding wheel to rotate, so that coffee beans are ground; because the outer grinding wheel is in elastic contact with the bean bin through the elastic piece, the limit of the outer grinding wheel fixedly connected to the bean bin is eliminated, the elastic piece can apply force towards the center to the outer peripheral wall of the outer grinding wheel, concentricity of the outer grinding wheel and the inner grinding wheel is improved, the thickness of the coffee powder can be kept consistent, and different powder sizes are avoided.

According to some embodiments of the utility model, a shaft sleeve part is arranged in the middle of the bean bin of the grinding wheel assembly, and the rotating shaft penetrates through the shaft sleeve part.

According to some embodiments of the utility model, a spring is arranged between the shaft sleeve part and the inner grinding wheel, the spring is sleeved on the rotating shaft, the upper end of the spring is abutted against the lower end of the shaft sleeve part, the lower end of the spring is abutted against the upper end of the inner grinding wheel, and the spring applies downward force to the inner grinding wheel.

According to some embodiments of the utility model, the handheld bean grinder further comprises an adjusting rod sleeved on the rotating shaft and in threaded connection with the rotating shaft, and the upper end of the adjusting rod is abutted against the lower end of the inner grinding wheel; the rotation of the adjusting rod relative to the rotating shaft can drive the inner grinding wheel to move up and down so as to change the size of the grinding area of the grinding wheel assembly.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of the construction of a grinding wheel assembly according to some embodiments of the utility model;

FIG. 2 is a schematic view of a portion of the construction of a grinding wheel assembly according to some embodiments of the utility model;

FIG. 3 is a schematic illustration of the structure of an outer grinding wheel according to some embodiments of the utility model;

FIG. 4 is a schematic view of the structure of a bean bin according to some embodiments of the utility model;

FIG. 5 is a schematic view of the structure of a support ring according to some embodiments of the utility model;

FIG. 6 is a schematic illustration of the structure of a support ring and an inner grinding wheel according to some embodiments of the utility model;

FIG. 7 is a top view of a support ring and inner grinding wheel according to some embodiments of the utility model;

fig. 8 is a schematic diagram of a handheld bean grinder according to some embodiments of the present utility model.

Reference numerals:

the device comprises a main machine bin 100, a driving motor 101, a bin 110, a powder bin 120, a rotating shaft 130, an adjusting rod 140, a grinding area 150 and an annular accommodating area 160;

bean bin 200, positioning portion 210, boss 220, spring 230;

an inner grinding wheel 300, an outer grinding wheel 310, an annular protrusion 320, a first notch 321;

the support ring 400, the elastic member 410, the annular support 420, the mounting groove 430, and the second notch 431.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the direction or positional relationship indicated with respect to the description of the orientation, such as up, down, etc., is based on the direction or positional relationship shown in the drawings, is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Embodiments of the present utility model will be further described below with reference to the accompanying drawings.

According to some embodiments of the present utility model, referring to fig. 1 and 2, the grinding wheel assembly includes a bean bin 200, an inner grinding wheel 300, an outer grinding wheel 310, and a support ring 400. The outer diameter of the inner grinding wheel 300 is gradually increased from top to bottom. The outer grinding wheel 310 is sleeved on the inner grinding wheel 300, a grinding area 150 is formed between the inner grinding wheel 300 and the outer grinding wheel 310, and the inner grinding wheel 300 and the outer grinding wheel 310 can relatively rotate to grind materials in the grinding area 150. The support ring 400 is fixedly connected with the lower end of the bean bin 200, the support ring 400 is sleeved on the outer grinding wheel 310, and the support ring 400 is matched with the bean bin 200 together to limit the outer grinding wheel 310 to move along the up-down direction. The pod cartridge 200 may be capable of restricting rotation of the outer grinding wheel 310 relative to the pod cartridge 200. The support ring 400 is provided with an elastic member 410. The elastic member 410 abuts the outer circumferential surface of the outer grinding wheel 310 on a side close to the axis of the support ring 400 to apply a force to the outer grinding wheel 310 in the direction of the axis of the inner grinding wheel 300.

It will be appreciated that the elastic contact between the outer grinding wheel 310 and the bean bin 200 by the elastic member 410 removes the limitation of the outer grinding wheel 310 being fixedly connected to the bean bin 200, and the elastic member 410 can apply a force toward the center to the outer peripheral wall of the outer grinding wheel 310, thereby improving concentricity of the outer grinding wheel 310 and the inner grinding wheel 300.

It should be noted that, in the prior art, the outer grinding wheel 310 is directly and fixedly connected to the bean bin 200, so that the concentricity of the outer grinding wheel 310 and the inner grinding wheel 300 cannot be further improved, and the elastic member 410 can enable the outer grinding wheel 310 to be finely moved in the horizontal direction, thereby improving the concentricity.

According to some embodiments of the present utility model, referring to fig. 1 and 2, the inner side of the support ring 400 is upwardly protruded to form an annular support part 420, an annular receiving area 160 is formed between the upper end of the annular support part 420 and the bean bin 200, the upper end of the outer grinding wheel 310 is protruded in a direction away from the axis of the outer grinding wheel 310 to form an annular protrusion 320, and the annular protrusion 320 is inserted into the annular receiving area 160.

It will be appreciated that the annular support 420 limits the downward movement of the annular protrusion 320, and that the bean bin 200 limits the upward movement of the annular protrusion 320, and that the cooperation of the bean bin 200 and the annular support 420 together limits the upward and downward movement of the outer grinding wheel 310.

According to some embodiments of the present utility model, referring to fig. 4, the inner side of the bean bin 200 is provided with a positioning portion 210 protruding in a radial direction. Referring to fig. 3, the outer circumferential surface of the annular protrusion 320 is provided with a first notch 321, and the positioning portion 210 is inserted into the first notch 321 to allow the bean bin 200 to restrict the outer grinding wheel 310 from rotating relative to the bean bin 200.

Preferably, the plurality of positioning portions 210 are circumferentially distributed around the axis of the bean bin 200, the plurality of first notches 321 are circumferentially distributed around the axis of the annular protrusion 320, and the plurality of first notches 321 are in one-to-one correspondence with the plurality of positioning portions 210, so as to improve the connection stability between the annular protrusion 320 and the bean bin 200.

According to some embodiments of the present utility model, referring to fig. 5 to 7, the support ring 400 is provided with a plurality of seating grooves 430, the seating grooves 430 are uniformly distributed around the axis of the support ring 400, the seating grooves 430 are in one-to-one correspondence with the plurality of elastic members 410, and the elastic members 410 are disposed in the seating grooves 430.

It can be appreciated that the side of the plurality of elastic members 410 near the axis of the support ring 400 is abutted against the outer circumferential wall of the outer grinding wheel 310 and applies a force, thereby improving concentricity of the outer grinding wheel 310 and the inner grinding wheel 300.

Preferably, referring to fig. 5, the seating groove 430 has a second notch 431 at a side near the axis of the support ring 400 such that the elastic member 410 partially passes through the second notch 431 to be abutted against the outer circumferential surface of the outer grinding wheel 310.

According to some embodiments of the present utility model, referring to fig. 8, a handheld bean grinder includes a grinding wheel assembly, a main machine bin 100, a bin 110, a powder bin 120, and a spindle 130. A driving motor 101 is arranged in the main machine bin 100. The bin 110 is located below the host bin 100, and the bin 110 is detachably connected with the host bin 100. The bin 110 is fixedly connected with a bean bin 200 of the grinding wheel assembly; the powder bin 120 is located below the bin 110, and the powder bin 120 is detachably connected with the bin 110. The upper end of the rotating shaft 130 is connected with the driving motor 101, the lower end of the rotating shaft 130 penetrates through the inner grinding wheel 300 of the grinding wheel assembly, and the driving motor 101 can drive the rotating shaft 130 to rotate so as to drive the inner grinding wheel 300 to rotate.

When the handheld bean grinder is started, the driving motor 101 drives the axis to rotate so as to drive the inner grinding wheel 300 to rotate, so that coffee beans are ground; since the outer grinding wheel 310 is elastically contacted with the bean bin 200 through the elastic member 410, the limitation that the outer grinding wheel 310 is fixedly connected to the bean bin 200 is removed, the elastic member 410 can apply a force to the outer circumferential wall of the outer grinding wheel 310 toward the center, the concentricity of the outer grinding wheel 310 and the inner grinding wheel 300 is improved, the fineness of coffee powder can be kept consistent, and the difference of the powder sizes is avoided.

Preferably, the middle part of the bean bin 200 of the grinding wheel assembly is provided with a shaft sleeve part 220, and the rotating shaft 130 is penetrated through the shaft sleeve part 220, so that the connection stability of the rotating shaft 130 and the bean bin 200 is improved, and the coaxiality of the bean bin 200 and the inner grinding wheel 300 is improved.

Preferably, a spring 230 is disposed between the shaft sleeve 220 and the inner grinding wheel 300, the spring 230 is sleeved on the rotating shaft 130, the upper end of the spring 230 is abutted against the lower end of the shaft sleeve 220, the lower end of the spring 230 is abutted against the upper end of the inner grinding wheel 300, and the spring 230 applies downward force to the inner grinding wheel 300.

Further, the handheld bean grinder further comprises an adjusting rod 140, the adjusting rod 140 is sleeved on the rotating shaft 130 and is in threaded connection with the rotating shaft 130, and the upper end of the adjusting rod 140 is abutted against the lower end of the inner grinding wheel 300.

When the adjusting lever 140 rotates relative to the rotating shaft 130, the adjusting lever 140 can move up and down relative to the rotating shaft 130, so as to drive the inner grinding wheel 300 to move up and down, so as to change the size of the grinding area 150 of the grinding wheel assembly, and further change the thickness of the powder.

In the description of the present specification, reference to the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A grinding wheel assembly, comprising:

a bean bin (200);

an inner grinding wheel (300);

an outer grinding wheel (310) sleeved on the inner grinding wheel (300), wherein a grinding area (150) is formed between the inner grinding wheel (300) and the outer grinding wheel (310), and the inner grinding wheel (300) and the outer grinding wheel (310) rotate relatively to grind materials positioned in the grinding area (150);

the support ring (400) is fixedly connected with the lower end of the bean bin (200), the support ring (400) is sleeved on the outer grinding wheel (310), the support ring (400) is matched with the bean bin (200) together to limit the outer grinding wheel (310) to move in the up-down direction, the bean bin (200) can limit the outer grinding wheel (310) to rotate relative to the bean bin (200), and an elastic piece (410) is arranged on the support ring (400); the elastic member (410) is abutted against the outer peripheral surface of the outer grinding wheel (310) on a side close to the axis of the support ring (400) to apply a force to the outer grinding wheel (310) in the direction of the axis of the inner grinding wheel (300).

2. The grinding wheel assembly of claim 1, wherein the inner side of the support ring (400) protrudes upward to form an annular support (420), an annular receiving area (160) is formed between an upper end of the annular support (420) and the bean bin (200), an upper end of the outer grinding wheel (310) protrudes in a direction away from an axis of the outer grinding wheel (310) to form an annular protrusion (320), and the annular protrusion (320) is inserted into the annular receiving area (160).

3. Grinding wheel assembly according to claim 2, wherein the inner side of the bean bin (200) is provided with a radially protruding positioning portion (210), the outer circumferential surface of the annular protrusion (320) is provided with a first notch (321), and the positioning portion (210) is inserted into the first notch (321) to enable the bean bin (200) to limit the rotation of the outer grinding wheel (310).

4. A grinding wheel assembly according to claim 3, wherein a plurality of said positioning portions (210) are circumferentially distributed about the axis of said bean bin (200), a plurality of said first notches (321) are circumferentially distributed about the axis of said annular protrusion (320), and a plurality of said first notches (321) are in one-to-one correspondence with a plurality of said positioning portions (210).

5. The grinding wheel assembly according to claim 1, wherein the supporting ring (400) is provided with a plurality of placement grooves (430), the placement grooves (430) are uniformly distributed circumferentially around the axis of the supporting ring (400), the placement grooves (430) are in one-to-one correspondence with the elastic members (410), and the elastic members (410) are disposed in the placement grooves (430).

6. The grinding wheel assembly according to claim 5, wherein a side of the seating groove (430) near the axis of the support ring (400) has a second notch (431) so that the elastic member (410) partially passes through the second notch (431) to abut against the outer circumferential surface of the outer grinding wheel (310).

7. A hand-held bean grinder, comprising:

the grinding wheel assembly of any one of claims 1 to 6;

a host bin (100) provided with a driving motor (101);

the bin (110) is positioned below the main machine bin (100), the bin (110) is detachably connected with the main machine bin (100), and the bin (110) is connected with the grinding wheel assembly;

the powder bin (120) is positioned below the bin (110), and the powder bin (120) is detachably connected with the bin (110);

the rotating shaft (130), the upper end of the rotating shaft (130) is connected with the driving motor (101), the lower end of the rotating shaft (130) penetrates through the inner grinding wheel (300) of the grinding wheel assembly, and the driving motor (101) can rotate to drive the rotating shaft (130) to rotate so as to drive the inner grinding wheel (300) to rotate.

8. The handheld bean grinder of claim 7, wherein a shaft sleeve portion (220) is provided at a middle portion of the bean bin (200) of the grinding wheel assembly, and the rotating shaft (130) is penetrated through the shaft sleeve portion (220).

9. The handheld bean grinder of claim 8, wherein a spring (230) is disposed between the shaft sleeve portion (220) and the inner grinding wheel (300), the spring (230) is sleeved on the rotating shaft (130), an upper end of the spring (230) is abutted to a lower end of the shaft sleeve portion (220), a lower end of the spring (230) is abutted to an upper end of the inner grinding wheel (300), and the spring (230) applies a downward force to the inner grinding wheel (300).

10. The handheld bean grinder according to claim 9, further comprising an adjusting rod (140), wherein the adjusting rod (140) is sleeved on the rotating shaft (130) and is in threaded connection with the rotating shaft (130), and the upper end of the adjusting rod (140) is abutted against the lower end of the inner grinding wheel (300); the rotation of the adjusting rod (140) relative to the rotating shaft (130) can drive the inner grinding wheel (300) to move up and down so as to change the size of the grinding area (150) of the grinding wheel assembly.