Fineness adjusting mechanism of coffee bean grinding machine

Abstract

The utility model relates to the technical field of grinding machines, in particular to a fineness adjusting mechanism of a coffee bean grinding machine. Comprising a first roller, a first gap cam connected with the first roller, a first driving wheel used for driving the first gap cam to rotate, a second roller, a second gap cam connected with the second roller, and a second driving wheel used for driving the second gap cam to rotate. The central axis of the first gap cam deviates from the central axis of the first driving wheel, and the central axis of the second gap cam deviates from the central axis of the second driving wheel; the first driving wheel drives the first gap cam eccentrically arranged with the first driving wheel to swing, the second driving wheel drives the second gap cam eccentrically arranged with the second driving wheel to swing, and therefore the distance between the first roller and the second roller is adjusted, coffee bean grinding fineness is adjusted, the precision of the cam adjusting mode is high, and the structure is compact.

Description

TECHNICAL FIELD

[0001] The utility model relates to a grinding machine technical field especially, it relates to a coffee bean grinder fineness adjusting mechanism. BACKGROUND

[0002] Coffee bean grinder usually adopts two rotation settings roller cylinder to carry out the grinding to coffee bean, and the interval between the two roller cylinders determines the coffee bean grinding fineness.

[0003] The interval adjusting mechanism in the prior art usually adopts worm gear structure, and the motor drives the worm gear to rotate, and the nut on the worm gear is driven to rotate and displace, and the roller cylinder fixed with the nut is relatively displaced to realize the adjustment of the interval between the two roller cylinders, but the adjustment precision of the worm gear structure is not high. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the prior art usually adopts worm gear structure to adjust the roller cylinder interval, but the adjustment precision is not high, and provides a coffee bean grinder fineness adjusting mechanism.

[0005] In order to solve the above technical problem, the utility model adopts the following technical scheme: a coffee bean grinder fineness adjusting mechanism, including first roller cylinder, first gap cam connected with first roller cylinder and first drive wheel for driving first gap cam to rotate, second roller cylinder, second gap cam connected with second roller cylinder and second drive wheel for driving second gap cam to rotate;

[0006] And the central axis of the first gap cam deviates from the central axis of the first drive wheel, and the central axis of the second gap cam deviates from the central axis of the second drive wheel.

[0007] Further, the first roller cylinder end is contracted and formed with a first connecting part for connecting with the first gap cam profile, and the second roller cylinder end is contracted and formed with a second connecting part for connecting with the second gap cam profile.

[0008] Further, it further includes a mounting plate internally formed with a mounting hole, and the first gap cam and the second gap cam are rotatably installed in the mounting hole.

[0009] Further, the first drive wheel and the second drive wheel are both driven gears, and a driving gear is arranged between the two, and the driving gear is driven by a rotary drive mechanism.

[0010] Further, the rotary drive mechanism is a rudder, a stepping motor, a servo motor or a hand wheel.

[0011] Further, the first gap cam and the mounting hole corresponding thereto are arranged with a first gap shaft sleeve, and the second gap cam and the mounting hole corresponding thereto are arranged with a second gap shaft sleeve.

[0012] The utility model discloses the beneficial effects: the utility model discloses utilize first drive wheel to drive the first gap cam swing of eccentric setting with it, and second drive wheel drives the second gap cam swing of eccentric setting with it, adjusts the interval of first roller and second roller, thereby realizes the adjustment of coffee bean grinding fineness, and the precision of cam adjusting mode is higher, and the structure is compact. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model is further explained below in combination with the drawings and examples.

[0014] Figure 1 It is the three -dimensional schematic view of first perspective of the utility model;

[0015] Figure 2 It is the three -dimensional schematic view of second perspective after removing cover of the utility model;

[0016] Figure 3 It is the front view of second perspective after removing cover of the utility model;

[0017] Figure 4 It is Figure 3 The sectional view of A-A direction in;

[0018] Figure 5 It is the cooperation schematic drawing of two rollers;

[0019] Figure 6 It is the sectional view of first roller, first gap cam and first drive wheel;

[0020] In the drawing:

[0021] 1, first roller;101, first connecting portion;

[0022] 2, first gap cam;

[0023] 3, first drive wheel;

[0024] 4, second roller;401, second connecting portion;

[0025] 5, second gap cam;

[0026] 6, second drive wheel;

[0027] 7, mounting plate;701, mounting hole;

[0028] 8, driving gear;

[0029] 9, rotary drive mechanism;901, indication arrow;

[0030] 10. First clearance bushing;

[0031] 11. Second clearance bushing. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0033] like Figures 1-3 As shown, a fineness adjustment mechanism for a coffee bean grinder includes a first roller 1, a first gap cam 2 connected to the first roller 1, and a first drive wheel 3 for driving the first gap cam 2 to rotate; a second roller 4, a second gap cam 5 connected to the second roller 4, and a second drive wheel 6 for driving the second gap cam 5 to rotate; the first gap cam 2 is installed at the end of the first roller 1, and the second gap cam 5 is installed at the end of the second roller 4; both the first roller 1 and the second roller 4 have several grooves in the middle part to grind coffee beans during rotation.

[0034] Furthermore, the central axis of the first clearance cam 2 is offset from the central axis of the first drive wheel 3, meaning they are eccentrically set; similarly, the central axis of the second clearance cam 5 is offset from the central axis of the second drive wheel 6, meaning they are also eccentrically set. Figure 3 In the diagram, A1 is the center point of the first drive wheel 3, and A2 is the center point of the first clearance cam 2. A1 and A2 are not concentric.

[0035] When the first drive wheel 3 rotates, the first gap cam 2, which is eccentrically set with respect to the first drive wheel 3, swings around the rotation axis of the first drive wheel 3, causing the first roller 1 to move closer to or away from the second roller 4. When the second drive wheel 6 rotates, the second gap cam 5, which is eccentrically set with respect to the second drive wheel 6, swings around the rotation axis of the second drive wheel 6, causing the second roller 4 to move closer to or away from the first roller 1. Thus, the distance between the first roller 1 and the second roller 4 can be adjusted, that is, the fineness of coffee bean grinding can be adjusted. The cam adjustment structure used in this embodiment has high adjustment accuracy, which can reach the micron level.

[0036] In some examples, the end of the first roller 1 is tapered to form a first connecting portion 101 for connecting with the profile of the first gap cam 2. The first gap cam 2 has a first connecting hole for the first connecting portion 101 to be inserted. The first connecting hole and the first connecting portion 101 are shaped and have non-circular cross sections to achieve synchronous rotation of the first roller 1 and the first gap cam 2. At the same time, a first step is formed between the first connecting portion 101 and the first roller 1 to axially limit the first gap cam 2. There are two first gap cams 2 and two first drive wheels 3, which are respectively arranged at both ends of the first roller 1 in the axial direction. When the first gap cam 2 and the first drive wheel 3 at one end of the first roller 1 in the axial direction move and drive the first roller 1 to rotate, the first gap cam 2 and the first drive wheel 3 at the other end rotate synchronously to ensure the synchronicity of the two ends of the first roller 1 and avoid axial displacement.

[0037] The second roller 4 has a tapered end forming a second connecting part 401 for connecting with the profile of the second gap cam 5. The second gap cam 5 has a second connecting hole for the second connecting part 401 to be inserted. The second connecting hole and the second connecting part 401 are shaped and have non-circular cross sections, thereby achieving synchronous rotation of the second roller 4 and the second gap cam 5. At the same time, a second step is formed between the second connecting part 401 and the second roller 4 for axially limiting the second gap cam 5. There are two second gap cams 5 and two second drive wheels 6, which are respectively distributed at both ends of the second roller 4 in the axial direction. When the second gap cam 5 and the second drive wheel 6 at one end of the second roller 4 in the axial direction move and drive the second roller 4 to rotate, the second gap cam 5 and the second drive wheel 6 at the other end rotate synchronously to ensure the synchronicity of the two ends of the second roller 4 and avoid axial displacement.

[0038] In some examples, such as Figure 4 As shown, it also includes a mounting plate 7 with mounting holes 701 inside. There are two mounting plates 7, which are distributed on both sides of the roller axis. The first gap cam 2 and the second gap cam 5 are rotatably installed in their corresponding mounting holes 701. The hole wall of the mounting hole 701 can limit the swinging first gap cam 2 and second gap cam 5.

[0039] In some examples, such as Figure 5 As shown, the first drive wheel 3 and the second drive wheel 6 are both driven gears, and a drive gear 8 is meshed between them. The drive gear 8 is driven by a rotary drive mechanism 9. The rotary drive mechanism 9 drives the drive gear 8 to rotate, and the drive gear 8 can drive the first drive wheel 3 and the second drive wheel 6 on both sides to rotate synchronously, so as to adjust the distance between the first roller 1 and the second roller 4.

[0040] In some examples, the rotary drive mechanism 9 is a servo motor, stepper motor, servo motor or handwheel. The servo motor, stepper motor and servo motor are electric, and the handwheel is manual. The two rotary drive mechanisms 9 located on both sides of the roller can be the same or different. In this embodiment, one of the rotary drive mechanisms 9 is a servo motor and the other is a handwheel. The handwheel is provided with an indicator arrow 901 and has anti-slip grooves.

[0041] In some examples, such as Figure 4 and Figure 6 As shown, a first clearance sleeve 10 is disposed between the first clearance cam 2 and the mounting hole 701, and a second clearance sleeve 11 is disposed between the second clearance cam 5 and the mounting hole 701.

[0042] Working principle:

[0043] The rotary drive mechanism 9 drives the drive gear 8 to rotate, and the drive gear 8 drives the first drive wheel 3 and the second drive wheel 6 on both sides to rotate synchronously. The first gap cam 2, which is eccentrically set with the first drive wheel 3, swings around the rotation axis of the first drive wheel 3, causing the first roller 1 to move closer to or away from the second roller 4. The second gap cam 5, which is eccentrically set with the second drive wheel 6, swings around the rotation axis of the second drive wheel 6, causing the second roller 4 to move closer to or away from the first roller 1. Thus, the distance between the first roller 1 and the second roller 4 can be adjusted, that is, the fineness of the coffee bean grind can be adjusted.

[0044] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fineness adjustment mechanism for a coffee bean grinder, characterized in that: It includes a first roller (1), a first gap cam (2) connected to the first roller (1) and a first drive wheel (3) for driving the first gap cam (2) to rotate, a second roller (4), a second gap cam (5) connected to the second roller (4) and a second drive wheel (6) for driving the second gap cam (5) to rotate; Furthermore, the central axis of the first clearance cam (2) is offset from the central axis of the first drive wheel (3), and the central axis of the second clearance cam (5) is offset from the central axis of the second drive wheel (6).

2. The coffee bean grinder fineness adjustment mechanism according to claim 1, characterized in that: The first roller (1) has a first connecting portion (101) formed at its end for connecting with the profile of the first gap cam (2), and the second roller (4) has a second connecting portion (401) formed at its end for connecting with the profile of the second gap cam (5).

3. The fineness adjustment mechanism for a coffee bean grinder according to claim 2, characterized in that: It also includes a mounting plate (7) with mounting holes (701) inside, and the first gap cam (2) and the second gap cam (5) are rotatably mounted in the mounting holes (701).

4. The fineness adjustment mechanism for a coffee bean grinder according to claim 1, characterized in that: Both the first drive wheel (3) and the second drive wheel (6) are driven gears, and a drive gear (8) is provided between them. The drive gear (8) is driven by a rotary drive mechanism (9).

5. The coffee bean grinder fineness adjustment mechanism according to claim 4, characterized in that: The rotary drive mechanism (9) is a servo motor, stepper motor, servo motor or handwheel.

6. The coffee bean grinder fineness adjustment mechanism according to claim 3, characterized in that: A first clearance sleeve (10) is disposed between the first clearance cam (2) and its corresponding mounting hole (701), and a second clearance sleeve (11) is disposed between the second clearance cam (5) and its corresponding mounting hole (701).

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